Encoding recording data on optical disks

Abstract

An encoding method for recording gap regions or sectors having repeated data is disclosed. At least one sector is entirely encoded and stored in a memory buffer of the optical recording system. If the currently encoded are gap regions or sector having repeated data embedded in the fields of user data, only those portions affected by the modified header will be encoded to derive associated P code and Q code. The error detection code is firstly generated in the mode 1 standard when a gap region is encoded. P code is then encoded for those regions affected by the sequentially modified header and error detection code, while associated Q code is then derived according the modified header, error detection code, and P code. In the mode 2 form 1 and mode form 2 standards, only those regions affected by the sequentially modified header should be re-encoded again. Since the remaining portions employ the same data as the last encoded one in the memory buffer so that the encoding performance would be significantly upgraded whatever encoding standards are employed.

Description

.Iadd.CROSS-REFERENCE TO RELATED APPLICATION.Iaddend.

.Iadd.This patent application is a reissue application for commonly assigned U.S. Pat. No. 7,023,784, issued Apr. 4, 2006 from U.S. patent application Ser. No. 10/400,574, filed on Mar. 28, 2003..Iaddend.

BACKGROUND

1. Field of the Invention

The present invention is related to an encoding method for recording data on a compact disk (CD), and more particularly, to an encoding method that can efficiently upgrade the data encoding performance when an optical recording system records gap regions or sectors including repeated data onto a compact disk.

2. Background of the Invention

.[.Recently, optical.]. .Iadd.Optical .Iaddend.disks .Iadd.have .Iaddend.become an important and popular storage media for holding a huge volume of data. Generally, the data that is ready to be recorded onto a compact disk is divided and encoded into a plurality of sectors by following standard formats such as the sector structures shown in FIGS. 1 to 3. In these figures, the unit of data is byte, and there are 2352 bytes included in a sector. FIG. 1 is a schematic diagram of the first encoding form (e.g., mode 1 standard), which is adapted to encode data for application software. FIGS. 2 and 3 respectively show the second encoding form (e.g., mode 2 form 1 standard) and the third encoding form (e.g., mode 2 form 2 standard) that both of them are adapted for encoding video/audio data.

The conventional encoding method is described by making reference with FIG. 1. A host such as a personal computer (PC) firstly transfers a user data 13 having 2048 bytes to an optical recording system, e.g. a compact disk-recordable (CD-R) drive or a compact disk-rewritable (CD-RW) drive. The optical recording system then generates a synchronous code 11 and a header 12 for the user data 13, while an error detection code 14 (EDC) is generated according to the synchronous code 11, header 12, and the user data 13. Sequentially, after a zero code 15 is attached (with 4-byte length), an error correction code 16 (ECC) is next generated according to the header 12, user data 13, EDC 14, and the zero code 15. The first encoding form (or the C3 encoding procedure) is completed when the above encoding procedure terminates, wherein the ECC 16 includes a P code 161 (P-parity check code) and a Q code 162 (Q-parity check code). Sequential encoding procedures, including C2 and C1 encoding procedures, are then performed to the complete encoded data under the mode 1 standard.

Sometimes the optical recording system will record so-called gap regions on the compact disk within the data recording procedures. For example, when an audio or music CD is recording, the optical recording system may record a lot of gap regions (e.g., 2 seconds, about 150 gap regions) adjacent to a just recorded song before recording another one. Besides, if the so-called buffer-under-run occurs during data recoding operations, the optical recording system will also record gap regions on the current compact disk and wait for the data stored in buffers reaches to a predetermined threshold again. In comparison with a normal sector, these gap regions usually contain repeated information (e.g., all bit 0's) stored therein, and contents of the gap regions will be repeated except the header 12, 22 and 32, the EDC 14, 25 and 35, and the ECC 16 and 22.

As shown in FIG. 1, when a sector is being encoded, the ECC 16 will be generated according the header 12, user data 13, EDC 14 and zero code 15, while the ECC 26 will be derived according to the user data 24 and EDC 25 as shown in FIG. 2. However, since the .[.the.]. user data 13, 24 and 34 occupy most of the entire sector portions and they usually store repeated data as mentioned above, the conventional approach is .[.obvious.]. an inefficient way for encoding information due to a time-cost as well as resource-cost.[.approach is employed for the optical recording system.]..

Accordingly, the aforementioned conventional encoding scheme obviously includes many disadvantages waiting for further improvements. The present invention therefore discloses a solution for overcoming these disadvantages of the prior art scheme.

SUMMARY OF THE INVENTION

The principal object of the present invention is to provide an encoding method for recording data on a compact disk so that the encoding efficiency can be significantly upgraded.[.than before.]..

In the preferred embodiment, the disclosed method provides an encoding method adapted for recording gap regions or sectors having repeated data that these repeated data are not always entirely encoded so as to upgrade encoding efficiency.

In accordance with the present invention, the optical recording system will encode at least one gap region or sector having repeated data firstly. The non-repeated portions such as the headers of the following gap regions or sectors in memory buffer of the optical recording system are then modified. Encoding procedures are then actuated for those portions affected by the modified header, while those unaffected portions are not encoded again since the unaffected ones in the memory buffer are not changed during the encoding procedures. The current encoded sector or gap region is then delivered to actuate following encoding procedures before being recorded onto a compact disc

In the embodiment, when .Iadd.a .Iaddend.header is modified in the memory buffer under the mode 1 standard when gap regions are encoded, the error detection code will be changed according to the modified .[.heard.]. .Iadd.header .Iaddend.simultaneously. The optical recording system then only encodes those portions affected by the modified header and error detection code. In another embodiment, since only the header changes as different gap regions in the mode 2 form 1 standard and the mode 2 form 2 standard, only those portions affected by the modified headers will be encoded by the optical recording system. Total time-cost regarding the encoding procedures will be significantly reduced since the bus bandwidths for accessing data is significantly reduced.

Numerous additional features, benefits and details of the method of the present invention are described in the detailed description which follows.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram of the first encoding form;

FIG. 2 is a diagram of the second encoding form;

FIG. 3 is a diagram of the third encoding form; and

FIG. 4 is a flow chart of the preferred embodiment according to the present invention.

Table 1 is a coding table of the first encoding form 1.

Table 2 is a coding table of the Q code of the first encoding form 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Please refer to FIG. 1 and by making reference to Tables 1 and 2. Table 1 is the coding table of the mode 1 standard (the sync code 11 of the first encoding form is not included in Table 1), while Table 2 is the coding table of the Q code 162 of the mode 1 standard. The word addresses (a word is composed of two bytes) are respectively marked as 0.about.1169 in Table 1, and the contents of the first encoding form is mapped into Table 1 orderly. For example, the header 12 is stored in words 0.about.1, the user data 13 employs 1024 words 2.about.1025 for storing purpose, the error detection code 14 is stored in words 1026.about.1027, while the fields of words 1028.about.1031 is used to store zero code 15. Furthermore, the P code 161 and the Q code of the error correction code 16 are respectively stored in words 1032.about.1117 and 1118.about.1169.

Since all information of the gap regions is stored into .Iadd.a .Iaddend.memory buffer of the optical recording system for encoding .[.purpose.]. .Iadd.purposes.Iaddend., the operating flows of the embodiment are described based on the memory buffer in the following paragraphs. The first embodiment demonstrates the operating flows when the optical recording system encodes data under the mode 1 standard. During the operation of recording data onto a compact disk, the optical recording system will encode whole portions of the first sector (or, at least one sector stored in the memory buffer currently). Thereafter, the optical recording system will generate a synchronous code 11 and a header 12 for the user data 13, while an error detection code 14 (EDC) is then derived according to the synchronous code 11, header 12, and the user data 13 when the mode 1 standard is followed. If gap regions are currently encoded, only the header 12 of the first sector (which indicates the first gap region now) will be changed (in fact, the content of header 12 will plus an integer one to indicate the header of the next gap region), which will also affect the error detection code under the mode 1 standard. Accordingly, the optical recording system will partially encode the next gap region to those non-repeated .[.potions.]. .Iadd.portions .Iaddend.(or affected portions), e.g. those portions affected by the modified header 12 (such column and rows including information regarding the modified header 12, EDC 14 and P code 161 under the mode 1 standard). All gap regions are encoded by following the aforementioned steps so that encoding efficiency will be significantly upgraded since most of the entire sectors do not need to be repeatedly encoded except the first gap region. On the other hand, if the currently encoded sector .[.are.]. .Iadd.is .Iaddend.not .Iadd.a .Iaddend.gap region, error correction code (ECC) 16 including P code and Q code are then derived by the optical recording system based on header 12, user data 13, EDC 14, and zero code 15. Please note that the optical recording system may employ the disclosed method of the embodiments for encoding sectors having repeated data embedded in their user data 13 in order to decrease required time-cost regarding encoding procedures. Any ordinary person having skills in the art may modify the embodiment .[.as applications.]. but all similar rearrangements and modifications within the .[.spirits.]. .Iadd.spirit .Iaddend.of the embodiment should included in the appended claims.

The first encoding operation when encoding sectors having non-repeated data (i.e., non-repeated data in their fields of user data 13) is described as follows. Please refer to Table 1 firstly. The optical recording system will generate P code 161 according to the data stored in rows R0.about.23, while the derived P code is then stored into rows R24.about.25 Taking column C0 as an example (the other columns will be manipulated in the same way), the optical recording system will encode the data in addresses 0, 43, 86 . . . 989 to derive corresponding parity check codes before storing in addresses 1032 and 1075.

Please now refer to Table 2. The optical recording system will generate Q code 162 according to the data in column C'0.about.C'42 after P code 161 is derived, while the derived Q code 162 is then stored into column C'43.about.44. Taking column R'0 as an example (the other rows will be encoded as the same manner), the optical recording system will encode the data in addresses 0, 44, 88 . . . 730 to generate corresponding parity check codes, while the derived parity check codes are then stored in addresses 1118 and 1144.

On the other hand, the second encoding operation when encoding gap regions or sectors having repeated data is described as follows. The optical recording system will firstly detect whether the gap region or sector encompasses repeated information or not. Please note that the gap regions basically including repeated data stored therein, this detection will be a step for guarantee purpose. If the detected sector or gap region is not a repeated one, the first encoding operation will be performed, otherwise the optical recording system will perform the second encoding operation to generate the error correction code 16 for those portions unaffected by the modified header 12.

Taking the first encoding form as an example. Since the header 12 in addresses 0.about.1, the error detection code 14 in addresses 1026.about.1027 and their corresponding parity check codes in addresses 1032, 1033, 1069, 1070, 1075, 1076, 1112 and 1113 are changed in the memory buffer when recording gap regions under mode 1 standard, the optical recording system only have to encode those portions affected by the above addresses during the second encoding operation.

For the sake of clarity, the encoding procedures of those portions affected by the modified header 12 are described further in the following.

(a) Firstly, the optical recording system generates the P code 161, according to the header 12 and the error detection code 14. Referring to Table 1, since there are columns C0, C1, C37 and C38 include the information regarding modified header 12 and EDC 14, the optical recording system generates the parity check codes for the data in columns C0, C1, C37 and C38 and then stores the derived parity check codes in addresses 1032, 1033, 1069, 1070, 1075, 1076, 1112 and 1113. Taking column C0 for example, the optical recording system will generate parity check codes according to the data in addresses 0, 43, 86 . . . 989, while these parity check codes are then stored into the addresses 1032 and 1075.

(b) The optical recording system generates the Q code 162 according to the header 12, the error detection code 14 and the P code 161 since modifications to P code 161 will cause modifications to Q code 162 simultaneously. Referring to Table 2, the optical recording system generates the Q code 162 according to the data in eight rows R'0, R'11, R'12, R'13, R'14, R'23, R'24 and R'25 and then stores the generated parity check codes in addresses 1118, 1129, 1130, 1131, 1132, 1141, 1142, 1143, 1144, 1155, 1156, 1157, 1158, 1167, 1168 and 1169, respectively. Taking row R'0 for example, the optical recording system generates parity check codes for the data in addresses 0, 44, 88 . . . 730 and then stores these parity check codes into the addresses 1118 and 1144. As known by an ordinary person having skills in the art, the modified header 12 will directly affect two rows by itself, and simultaneously affect two rows regarding the EDC 14 under the mode 1 standard. Since the P code 161 and Q code 162 will be affected to vary their currently stored values by the modified header 12 and EDC 14, eight additional rows are changed and need to be encoded in the embodiment. Finally, only aforementioned eight rows require to be encoded since some overlapped rows must be eliminated.

Please now refer to FIGS. 1 and 4 and by making reference to Tables 1 and 2, wherein FIG. 4 is a flow chart of the encoding method in accordance with the present invention. The encoding method of the present invention includes those steps as follows. Please note that the method described below is an embodiment of the present invention according to the mode 1 standard as shown in FIG. 1. However, in practice, this method also can apply to mode 2 form 1 and the mode 2 form 2 standards respectively shown in FIGS. 2 and 3, which may bring more encoding efficiency than that of the mode 1 standard. Detailed descriptions regarding the use of mode 2 form 1 and mode 2 form 2 standards are given later.

Step 401: During data recording operations, the optical recording system will encode the ready-for-encoding sector in the memory buffer to derive EDC 14 firstly. Of course, at least one sector (whether a gap region or a normal sector) should be encoded by using whole sector data. For example, there may create memory buffer having enough spaces to store three sectors in practical implementations, and the optical recording system will perform encoding procedures to all these three sectors before the operating flow of FIG. 4 starts. Please note that only the headers 12 of the three gap regions are different since they are given by sequential numerals, e.g. 00000001h, 00000002h, 00000003h are given for these three gap regions. The optical recording system will modify the header 00000001h of the first gap region to be 00000004h for the purpose of indicating the fourth gap region after the first gap region has been delivered to arisen the following C2 and C1 encoding procedures. Similarly, the fifth and sixth gap regions may be encoded by respectively modifying the header 00000002h and 00000003h to be 00000005h, 00000006h after the second and third gap regions being delivered. An artisan having ordinary skills in the art may modify the embodiment as requirements and applications .Iadd.dictate.Iaddend..

Step 402: The optical recording system then .[.check.]. .Iadd.checks .Iaddend.whether the next sector ready for recording indicates a gap region (or a sector having repeated data) or not. This step will be one for achieving the guarantee purpose as above-mentioned when encoding gap regions. Based on decision result, the optical recording system performs the following Step 403 if the next sector data does not indicate a gap region, otherwise the following Step 404 will be performed if a gap region is going to be encoded.

Step 403: A first encoding operation is performed, which also includes Steps 4031 and 4032 as follows.

Step 4031: Referring to Table 1, the optical recording system will perform an encoding operation to derive the P code 161 according to related portions of the encoding format in Table 1. In other words, the data in columns C0.about.C42 are sequentially encoded along the direction indicated by rows R0.about.R23, while the generated parity check codes are then stored in rows R24.about.25 Taking column C0 as an example (of course the other columns will be encoded as the same manner), the optical recording system will encode the data in addresses 0, 43, 86 . . . 989 and generate corresponding parity check codes that are stored in addresses 1032 and 1075 as mentioned above.

Step 4032: Referring to Table 2, the optical recording system would generate the Q code 162. Taking column R'0 as an example, the optical recording system will encode the data mapped to addresses 0, 44, 88 . . . 730 and generate a corresponding parity check code stored in addresses 1118 and 1144. The encoding procedure of the embodiment is complete after this step terminates, while the optical recording system returns to Step 401 for encoding the successive sectors or gap regions.

Step 404: The optical recording system will execute the second encoding operation, which can be divided into separate Steps 4041, 4042 and 4043 described as follows.

Step 4041: By comparing with the former encoded data, the optical recording system will firstly detect whether the ready-for-encoding sector or gap region encompasses repeated data or not. This step may be eliminated or remained for confirmation purpose as applications since the optical recording system understands whether the currently encoding sector is a gap region (or a sector having repeated data stored in the filed of user data 13) or not. The optical recording system will switch to Step 4031 to perform the first encoding operations if the current encoding sector or gap region does not include repeated data. Otherwise the optical recording system will go on the following Step 4042.

Step 4042: The optical recording system generates the parity check code, i.e., the P code 161, according to those non-repeated portions (or "affected" portions) that are affected by the modified header 12 and EDC 14. Please now refer to Table 1, the optical recording system generates the parity check code according to the data mapped to columns C0, C1, C37 and C 38 and stores the generated parity check code in addresses 1032, 1033, 1069, 1070, 1075, 1076, 1112 and 1113. Taking column C0 for example, the optical recording system will generate a parity check code mapped to addresses 1032 and 1075 according to the data mapped to addresses 0, 43, 86 . . . 989. Moreover, the optical recording system will generate the parity check code of the P code 161 corresponding to the repeated portions by copying that of the former encoding data.

Step 4043: The optical recording system generates the Q code 162 according to the non-repeated portions affected by the modified header 12 and EDC 14. Please note that only the header 12 mapped to addresses 0.about.1, the EDC 14 mapped to addresses 1026.about.1027 and their corresponding parity check code (P code) mapped to addresses 1032, 1033, 1069, 1070, 1075, 1076, 1112 and 1113 are non-repeated portions here. Please refer to Table 2 now, the optical recording system will generate the Q code 162 according to the data mapped to rows R'0, R'11, R'12, R'13, R'14, R'23, R'24 and R'25 and then stores the generated parity check code in Addresses 1118, 1129, 1130, 1131, 1132, 1141, 1142, 1143, 1144, 1155, 1156, 1157, 1158, 1167, 1168 and 1169. Taking row R'0 for example, the optical recording system will generate a parity check code mapped to addresses 1118 and 1144 according to the data in addresses 0, 44, 88 . . . 730. Moreover, the optical recording system does not need to generate Q code 162 for those repeated portions since the Q code 162 regarding the repeated portions has been calculated and stored in the memory buffer already when encoding the first gap region. The second encoding operation is complete when this step terminates and the current encoded gap region can be delivered for recording onto a compact disc. Finally the optical recording system returns to Step 401 for encoding the sequential gap regions.

Since the encoding method of the present invention only encodes the non-repeated portions of the gap region, time-cost for encoding the gap region will be effectively reduced so that the data encoding efficiency can be significantly upgraded due to the system resource being efficiently used. In another embodiment, there is no additional portion in the memory buffer affected by the modified headers 22 and 32 under the mode 2 form 1 and mode 2 form 2 standards, respectively. In other words, the EDC 25 and ECC 26 in the mode 2 form 1 standard, and the EDC 35 in the mode 2 form 2 standard will remains the same as the former encoded results when only the header is modified. Therefore, only those portions related to the headers require to be encoded by the optical recording system, that is, only those rows and columns that include the modified header need to be encoded in these two embodiment. Totally encoding time will be significantly reduced since the bus bandwidths for accessing data will be significantly reduced whatever mode 1, mode 2 form 1, or mode 2 form 2 standards are employed.

Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are embraced within the scope of the invention as defined in the appended claims.

TABLE-US-00001 .Iadd.TABLE 1 PRIOR ART C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 R0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 R1 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 R2 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 R3 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 R4 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 R5 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 R6 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 R7 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 R8 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 R9 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 R10 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 R11 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 R12 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 R13 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 R14 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 R15 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 R16 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 R17 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 R18 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 R19 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 R20 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 R21 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 R22 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 R23 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 R24 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 - 1046 R25 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 - 1089 R26 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 - 1132 R27 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 - 1158 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 R0 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 R1 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 R2 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 R3 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 R4 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 R5 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 R6 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 R7 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 R8 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 R9 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 R10 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 R11 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 R12 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 R13 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 R14 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 R15 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 R16 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 R17 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 R18 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 R19 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 R20 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 R21 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 R22 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 R23 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 - 1018 R24 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 - 1061 R25 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 - 1104 R26 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 R27 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 R0 30 31 32 33 34 35 36 37 38 39 40 41 42 R1 73 74 75 76 77 78 79 80 81 82 83 84 85 R2 116 117 118 119 120 121 122 123 124 125 126 127 128 R3 159 160 161 162 163 164 165 166 167 168 169 170 171 R4 202 203 204 205 206 207 208 209 210 211 212 213 214 R5 245 246 247 248 249 250 251 252 253 254 255 256 257 R6 288 289 290 291 292 293 294 295 296 297 298 299 300 R7 331 332 333 334 335 336 337 338 339 340 341 342 343 R8 374 375 376 377 378 379 380 381 382 383 384 385 386 R9 417 418 419 420 421 422 423 424 425 426 427 428 429 R10 460 461 462 463 464 465 466 467 468 469 470 471 472 R11 503 504 505 506 507 508 509 510 511 512 513 514 515 R12 546 547 548 549 550 551 552 553 554 555 556 557 558 R13 589 590 591 592 593 594 595 596 597 598 599 600 601 R14 632 633 634 635 636 637 638 639 640 641 642 643 644 R15 675 676 677 678 679 680 681 682 683 684 685 686 687 R16 718 719 720 721 722 723 724 725 726 727 728 729 730 R17 761 762 763 764 765 766 767 768 769 770 771 772 773 R18 804 805 806 807 808 809 810 811 812 813 814 815 816 R19 847 848 849 850 851 852 853 854 855 856 857 858 859 R20 890 891 892 893 894 895 896 897 898 899 900 901 902 R21 933 934 935 936 937 938 939 940 941 942 943 944 945 R22 976 977 978 979 980 981 982 983 984 985 986 987 988 R23 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 R24 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 R25 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 R26 R27.Iaddend.

TABLE-US-00002 .Iadd.TABLE 2 PRIOR ART C'0 C'1 C'2 C'3 C'4 C'5 C'6 C'7 C'8 C'9 C'10 C'11 C'12 C'13 C'14 R'0 0 44 88 132 176 220 264 308 352 396 440 484 528 572 616 R'1 43 87 131 175 219 263 307 351 395 439 483 527 571 615 659 R'2 86 130 174 218 262 306 350 394 438 482 526 570 614 658 702 R'3 129 173 217 261 305 349 393 437 481 525 569 613 657 701 745 R'4 172 216 260 304 348 392 436 480 524 568 612 656 700 744 788 R'5 215 259 303 347 391 435 479 523 567 611 655 699 743 787 831 R'6 258 302 346 390 434 478 522 566 610 654 698 742 786 830 874 R'7 301 345 389 433 477 521 565 609 653 697 741 784 829 873 917 R'8 344 388 432 476 520 564 608 652 696 740 784 828 872 916 960 R'9 387 431 475 519 563 607 651 695 739 783 827 871 915 959 1003 R'10 430 474 518 562 606 650 694 738 782 826 870 914 958 1002 1046 R'11 473 517 561 605 649 693 737 781 825 869 913 957 1001 1045 1089 R'12 516 560 604 648 692 736 780 824 868 912 956 1000 1044 1088 14 R'13 559 603 647 691 735 779 823 867 911 955 999 1043 1087 13 57 R'14 602 646 690 734 778 822 866 910 954 998 1042 1086 12 56 100 R'15 645 689 733 777 821 865 909 953 997 1041 1085 11 55 99 143 R'16 688 732 776 820 864 908 952 996 1040 1084 10 54 98 142 186 R'17 731 774 819 863 907 951 995 1039 1083 9 53 97 141 185 229 R'18 774 818 862 906 950 994 1038 1082 8 52 96 140 184 228 272 R'19 817 861 905 949 993 1037 1081 7 51 95 139 183 227 271 315 R'20 860 904 948 992 1036 1080 6 50 94 138 182 226 270 314 358 R'21 903 947 991 1035 1079 5 49 93 137 181 225 269 313 357 401 R'22 946 990 1034 1078 4 48 92 136 180 224 268 312 356 400 444 R'23 989 1033 1077 3 47 91 135 179 223 267 311 355 399 443 487 R'24 1032 1076 2 46 90 134 178 222 266 310 354 398 442 486 530 R'25 1075 1 45 89 133 177 221 265 309 353 397 441 485 529 573 C'15 C'16 C'17 C'18 C'19 C'20 C'21 C'22 C'23 C'24 C'25 C'26 C'27 C'28 C'2- 9 R'0 660 704 748 792 836 880 924 968 1012 1056 1100 26 70 114 158 R'1 703 747 791 835 879 923 967 1011 1055 1099 25 69 113 157 201 R'2 746 790 834 878 922 966 1010 1054 1098 24 68 112 156 200 244 R'3 789 833 877 921 965 1009 1053 1097 23 67 111 155 199 243 287 R'4 832 876 920 964 1008 1052 1096 22 66 110 154 198 242 286 330 R'5 875 919 963 1007 1051 1095 21 65 109 153 197 241 285 329 373 R'6 918 962 1006 1050 1094 20 64 108 152 196 240 284 328 372 416 R'7 961 1005 1049 1093 19 63 107 151 195 239 283 327 371 415 459 R'8 1004 1048 1092 18 62 106 150 194 238 282 326 370 414 458 502 R'9 1047 1091 17 61 105 149 193 237 281 325 369 413 457 501 545 R'10 1090 16 60 104 148 192 236 280 324 368 412 456 500 544 588 R'11 15 59 103 147 191 235 279 323 367 411 455 499 543 587 631 R'12 58 102 146 190 234 278 322 366 410 454 498 542 586 630 674 R'13 101 145 189 233 277 321 365 409 453 497 541 585 629 673 717 R'14 144 188 232 276 320 364 408 452 496 540 584 628 672 716 760 R'15 187 231 275 319 363 407 451 495 539 583 627 671 715 759 803 R'16 230 274 318 362 406 450 494 538 582 626 670 714 758 802 846 R'17 273 317 361 405 449 493 537 581 625 669 713 757 801 845 889 R'18 316 360 404 448 492 536 580 624 668 712 756 800 844 888 932 R'19 359 403 447 491 535 579 623 667 711 755 799 843 887 931 975 R'20 402 446 490 534 578 622 666 710 754 798 842 886 930 974 1018 R'21 445 489 533 577 621 665 709 753 797 841 885 929 973 1017 1061 R'22 488 532 576 620 664 708 752 796 840 884 928 972 1016 1060 1104 R'23 531 575 619 663 707 751 795 839 883 927 971 1015 1059 1103 29 R'24 574 618 662 706 750 794 868 882 926 970 1014 1058 1102 28 72 R'25 617 661 705 749 793 837 881 925 969 1013 1057 1101 27 71 115 C'30 C'31 C'32 C'33 C'34 C'35 C'36 C'37 C'38 C'39 C'40 C'41 C'42 C'43 C'4- 4 R'0 202 246 290 334 378 422 466 510 554 598 642 686 730 1118 1144 R'1 245 289 333 377 421 465 509 553 597 641 685 729 773 1119 1145 R'2 288 332 376 420 464 508 552 596 640 684 728 772 816 1120 1146 R'3 331 375 419 463 507 551 595 639 683 727 771 815 859 1121 1147 R'4 374 418 462 506 550 594 638 682 726 770 814 858 902 1122 1148 R'5 417 461 505 549 593 637 681 725 769 813 857 901 945 1123 1149 R'6 460 504 548 592 636 680 724 768 812 856 900 944 988 1124 1150 R'7 503 547 591 635 679 723 767 811 855 899 943 987 1031 1125 1151 R'8 546 590 634 678 722 766 810 854 898 942 986 1030 1074 1126 1152 R'9 589 633 677 721 765 809 853 897 941 985 1029 1073 1117 1127 1153 R'10 632 676 720 764 808 852 896 940 984 1028 1072 1116 42 1128 1154 R'11 675 719 763 807 851 895 939 983 1027 1071 1115 41 85 1129 1155 R'12 718 762 806 850 894 938 982 1026 1070 1114 40 84 128 1130 1156 R'13 761 805 849 893 937 981 1025 1069 1113 39 83 127 171 1131 1157 R'14 804 848 892 936 980 1024 1068 1112 38 82 126 170 214 1132 1158 R'15 847 891 935 979 1023 1067 1111 37 81 125 169 213 257 1133 1159 R'16 890 934 978 1022 1066 1110 36 80 124 168 212 256 300 1134 1160 R'17 933 977 1021 1065 1109 35 79 123 167 211 255 299 343 1135 1161 R'18 976 1020 1064 1108 34 78 122 166 210 254 298 342 386 1136 1162 R'19 1019 1063 1107 33 77 121 165 209 253 297 341 385 429 1137 1163 R'20 1062 1106 32 76 120 164 208 252 296 340 384 428 472 1138 1164 R'21 1105 31 75 119 163 207 251 295 339 383 427 471 515 1139 1165 R'22 30 74 118 162 206 250 294 338 382 426 470 514 558 1140 1166 R'23 73 117 161 205 249 293 337 381 425 469 513 557 601 1141 1167 R'24 116 160 204 248 292 336 380 424 468 512 556 600 644 1142 1168 R'25 159 203 247 291 335 379 423 467 511 555 599 643 687 1143 1169.Iaddend- .

Claims

What is claimed is:

1. A method for encoding data ready-for-recording on a compact disk, wherein said ready-for-recording data comprises a plurality of data sectors and each of said data .[.sector.]. .Iadd.sectors .Iaddend.having a header and a user data, said method comprising: encoding first sector of said plurality of data sectors; modifying said header of a second data sector of said plurality of data sectors, said second data sector being succeeding to said first data sector; partially encoding said second data sector by encoding an affected portion of said second data sector according to said modified header when said second sector having said user data identical to that of said first sector, wherein a portion of said second data sector that is not affected by said modified header is not varied when said affected portion is encoded; and encoding said second sector by using entire data of said second sector when said second sector has user data non-identical to that of said first sector.

2. The encoding method as claimed in claim 1 wherein said affected portion is varied with said modified header.

3. The encoding method as claimed in claim 2 wherein an encoding form for recording said optical disk is the mode 1 standard.

4. The encoding method as claimed in claim 1 wherein said modified header modified according to a relationship between said first sector and said second sector.

5. The encoding method as claimed in claim 4 wherein said affected portion comprises a row including information being modified by said modified header and a column including information being modified by said modified header.

6. The encoding method as claimed in claim 4 wherein said affected portion comprises an error detection code being modified according to said modified header.

7. The encoding method as claimed in claim 4 wherein said affected portion comprises an error correction code being modified according to said modified header.

8. The encoding method as claimed in claim 1 wherein said ready-for-recording data indicates a gap region when all of said user data in said plurality of data sectors are identical.

9. The encoding method as claimed in claim 1 wherein portion of said second data sector that is not affected by said modified header remains the same in a memory buffer of an optical recording system when encoding said second data sector.

10. A method of encoding a plurality of data sectors having identical user data before an optical recording system records said sector onto a compact disk comprising: encoding a first sector of said plurality of data sectors, wherein each one of said plurality of data sectors having a header; modifying said header of a second data sector of said plurality of data sectors, said second data sector being succeeding to said first data sector; .Iadd.and .Iaddend. partially encoding said second data sector by encoding an affected portion of said second data sector according to said modified header, wherein a portion of said second data sector that is not affected by said modified header is not varied when said affected portion is encoded.

11. The encoding method as claimed in claim 10 wherein said affected portion is varied with said modified header.

12. The encoding method as claimed in claim 10 wherein an encoding form for recording said optical disk is the mode 1 standard.

13. The encoding method as claimed in claim 12 wherein said affected portion comprises a row including information being modified by said modified header and a column including information being modified by said modified header.

14. The encoding method as claimed in claim 12 wherein said affected portion comprises an error detection code being modified according to said modified header.

15. The encoding method as claimed in claim 14 wherein said affected portion comprises an error correction code being modified according to said modified header.

16. The encoding method as claimed in claim 15 wherein said currently encoded sector follows a standard adapted to encode application software.

17. The encoding method as claimed in claim 10 wherein said ready-for-recording data indicates a gap region when all of said user data in said plurality of data sectors are identical.

18. The encoding method as claimed in claim 10 wherein said portion of said second data sector that is not affected by said modified header remains the same in a memory buffer of an optical recording system when encoding said second data sector.

19. A method for encoding a gap region ready-for-recording onto a compact disk, wherein said gap region comprises a plurality of data sectors and each of said data sectors having a repeated user data identical to said other data sectors and a header that is non-identical to said other data sectors, said method comprising: encoding a first sector of said plurality of data sectors according to said repeated user data and said non-repeated portion; modifying said header of a second data sector of said plurality of data sector according to a relationship between said first sector and said second data sector, said second data sector being succeeding to said first data sector; encoding an affected portion of said second data sector according to said modified header, wherein said affected portion is varied with said modified header; and encoding said second data sector according to an encoding form said compact disk being employed.

20. The encoding method as claimed in claim 19 wherein said step of encoding said affected portion of said second data sector comprises a step of encoding an error detection code of said second data sector according to a synchronous code of said second data sector, said modified header, and said identical user data when said encoding form is the mode 1 standard.

21. The encoding method as claimed in claim 19 wherein a non-affected portion of said encoded result of said first sector remains the same when encoding said gap region.

22. The encoding method as claimed in claim 19 wherein said step of encoding said affected portion of said second data sector skipped when said encoding form is the mode 2 standard.

.Iadd.23. A method for encoding data ready-for-recording on a compact disk, wherein the ready-for-recording data comprises multiple data sectors and the individual data sectors have a header and a user data, the method comprising: modifying the header of a second data sector of the multiple data sectors, the second data sector following a first data sector; and at least partially encoding the second data sector by encoding an affected portion of the second data sector according to the modified header if the second sector has identical user data to that of the first data sector, wherein a portion of the second data sector that is not affected by the modified header is not varied if the affected portion is encoded..Iaddend.

.Iadd.24. The method of claim 23 further comprising encoding the first data sector before the modifying..Iaddend.

.Iadd.25. The method of claim 23 further comprising encoding the second data sector by using substantially all data of the second data sector if the second data sector has user data that is not identical to that of the first data sector..Iaddend.

.Iadd.26. The method of claim 23 further comprising: encoding the first data sector before the modifying; and encoding the second data sector by using substantially all data of the second data sector if the second data sector has user data that is not identical to that of the first data sector..Iaddend.

.Iadd.27. A computer-readable storage device storing computer-executable instructions that, when executed, perform a method for encoding data ready-for-recording on a compact disk, wherein the ready-for-recording data comprises multiple data sectors and individual data sectors have a header and a user data, the method comprising: modifying the header of a second data sector of the multiple data sectors, the second data sector following a first data sector; and at least partially encoding the second data sector by encoding an affected portion of the second data sector according to the modified header if the second sector has identical user data to that of the first data sector, wherein a portion of the second data sector that is not affected by the modified header is not varied if the affected portion is encoded..Iaddend.

.Iadd.28. The computer-readable storage device of claim 27 wherein the method further comprises: encoding the first data sector before the modifying; and encoding the second data sector by using substantially all data of the second data sector if the second data sector has user data that is not identical to that of the first data sector..Iaddend.

.Iadd.29. A system for encoding data ready-for-recording on a compact disk, wherein the ready-for-recording data comprises multiple data sectors and individual data sectors have a header and a user data, comprising: a component configured to modify the header of a second data sector of the multiple data sectors, the second data sector following a first data sector; and a component configured to encode the second data sector by encoding an affected portion of the second data sector according to the modified header if the second sector has identical user data to that of the first data sector, wherein a portion of the second data sector that is not affected by the modified header is not varied if the affected portion is encoded..Iaddend.

.Iadd.30. A system for encoding data ready-for-recording on a compact disk, wherein the ready-for-recording data comprises multiple data sectors and individual data sectors have a header and a user data, comprising: means for modifying the header of a second data sector of the multiple data sectors, the second data sector following a first data sector; and means for at least partially encoding the second data sector by encoding an affected portion of the second data sector according to the modified header if the second sector has identical user data to that of the first data sector, wherein a portion of the second data sector that is not affected by the modified header is not varied if the affected portion is encoded..Iaddend.

.Iadd.31. The system of claim 30 further comprising: means for encoding the first data sector before the modifying; and means for encoding the second data sector by using substantially all data of the second data sector if the second data sector has user data that is not identical to that of the first data sector..Iaddend.