U.S. patent application number 16/596241 was filed with the patent office on 2020-05-07 for asymmetric video conferencing system and method.
The applicant listed for this patent is NANNING FUGUI PRECISION INDUSTRIAL CO., LTD.. Invention is credited to Yung-Chang Huang.
Application Number | 20200145610 16/596241 |
Document ID | / |
Family ID | 68617904 |
Filed Date | 2020-05-07 |
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United States Patent
Application |
20200145610 |
Kind Code |
A1 |
Huang; Yung-Chang |
May 7, 2020 |
ASYMMETRIC VIDEO CONFERENCING SYSTEM AND METHOD
Abstract
An asymmetric video conferencing system comprises a panoramic
video conferencing device in a first location and a head mounted
video conferencing device in a second location. The panoramic video
conferencing device acquires panoramic images of multiple
participants via a 360 degree camera, identifies a face or other
region of interest (ROI) in the panoramic images, and captures
video data of the ROI. To reduce bandwidth utilized, the ROI video
data is transmitted to the head mounted video conferencing device
used by a remote participant, who can command alternative views and
audio from the first location. Images and audio of the remote
participant can be transmitted to the first location for viewing
and hearing by the multiple participants, enabling virtual
face-to-face discussions. A method implementing the system is also
disclosed herein.
Inventors: |
Huang; Yung-Chang; (New
Taipei, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
NANNING FUGUI PRECISION INDUSTRIAL CO., LTD. |
Nanning |
|
CN |
|
|
Family ID: |
68617904 |
Appl. No.: |
16/596241 |
Filed: |
October 8, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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16183648 |
Nov 7, 2018 |
10491857 |
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16596241 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G06K 9/00228 20130101;
H04N 5/23238 20130101; H04N 7/15 20130101; H04N 7/147 20130101;
H04N 7/142 20130101 |
International
Class: |
H04N 7/14 20060101
H04N007/14; H04N 5/232 20060101 H04N005/232; G06K 9/00 20060101
G06K009/00; H04N 7/15 20060101 H04N007/15 |
Claims
1. An asymmetric video conferencing system, comprising: a panoramic
video conferencing device, comprising; a 360 degree camera adapted
for acquiring a panoramic video data of a plurality of first
participants; a first display device; and a speaker device; and a
head mounted video conferencing device, comprising: a second
display device; and a microphone adapted for receiving a voice
command, wherein the panoramic video conferencing device is adapted
for identifying a region of interest (ROI) in the panoramic video
data, where in the region of interest is a face region, extracting
video data of the ROI, acquiring, according to the ROI, locations
of each of the plurality of first participants, and transmitting
the video data of the ROI and the locations of the plurality of
first participants to the head mounted video conferencing device,
wherein the locations are angles of each of the plurality of first
participants; the head mounted video conferencing device is adapted
for receiving the video data of the ROI and displaying the video
data of the ROI on the second display device, transmitting a preset
angle and an angle determined from the locations of each of the
plurality of first participants according to the received voice
command to the panoramic video conferencing device; and the
panoramic video conferencing device is further adapted to
horizontally rotating the first display device and the speaker
based on the preset angle and the determined angle received from
the head mounted video conferencing device.
2. The system of claim 1, wherein the head mounted video
conferencing device, after receiving the video data of the ROI, is
adapted for further selecting a portion of the video data of the
ROI based on the preset angle and the locations of each of the
plurality of first participants and displaying the portion of the
video data of the ROI on the second display device.
3. The system of claim 1, wherein the panoramic video conferencing
device is further adapted for re-extracting the video data of the
ROI based on the preset angle and the determined angle received
from the head mounted video conferencing device and transmitting
the video data of the ROI which has been re-extracted to the head
mounted video conferencing device.
4. The system of claim 1, wherein the panoramic video conferencing
device further comprises a microphone array adapted for locating a
sound source location, the panoramic video conferencing device is
further adapted for transmitting the sound source location to the
head mounted video conferencing device, and the head mounted video
conferencing device is further adapted for simulating audio from
the sound source location.
5. An asymmetric video conferencing method adapted for a video
conferencing system, wherein the video conferencing system
comprising a panoramic video conferencing device, and a head
mounted video conferencing device, the panoramic video conferencing
device comprising a display device and a speaker device, the method
comprising: acquiring a panoramic video data of a plurality of
first participants by the panoramic video conferencing device;
extracting a video data of a region of interest (ROI) from the
panoramic video data and acquiring locations of each of the
plurality of first participants by the panoramic video conferencing
device; transmitting the video data of the ROI and the locations to
the head mounted video conferencing device by the panoramic video
conferencing device; displaying a portion of the video data of the
ROI according to a preset angle and the locations by the head
mounted video conferencing device; transmitting the preset angle
and an angle determined from the locations of each of the plurality
of first participants according to a voice command received by the
head mounted video conferencing device to the panoramic video
conferencing device by the head mounted video conferencing device;
and rotating the display device and the speaker horizontally based
on the preset angle and the determined angle by the panoramic video
conferencing device.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The application is a continuation of and claims priority
under 35 U.S.C. .sctn. 120 to U.S. application Ser. No. 16/183,648,
filed Nov. 7, 2018, the entire contents of which are incorporated
by reference herein.
FIELD
[0002] The subject matter herein generally relates to video
conferencing.
BACKGROUND
[0003] The traditional 360-degree video conferencing device can
display a panoramic image or display a small image of a speaker,
but if all the people participating in the video conference are to
be viewed, the panoramic image needs to be transmitted, which is
more bandwidth-consuming. In addition, there is no face-to-face
intimacy in video conferencing.
[0004] Thus, there is room for improvement within the art.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] Implementations of the present technology will now be
described, by way of example only, with reference to the attached
figures, wherein:
[0006] FIG. 1 is a schematic diagram of one embodiment of an
asymmetric video conferencing system.
[0007] FIG. 2 is a schematic structural diagram of one embodiment
of a panoramic video conferencing device.
[0008] FIG. 3 is a schematic structural diagram of one embodiment
of a head mounted video conferencing device in the system of FIG.
1.
[0009] FIG. 4 is a schematic diagram of one embodiment of an
indication map in the system of FIG. 1.
[0010] FIG. 5 is a flow chart of one embodiment of the operation of
the panoramic video conferencing device in FIG. 2.
[0011] FIG. 6 is a flow chart of one embodiment of the operation
process of the head mounted video conferencing device in FIG.
3.
DETAILED DESCRIPTION
[0012] It will be appreciated that for simplicity and clarity of
illustration, where appropriate, reference numerals have been
repeated among the different figures to indicate corresponding or
analogous elements. In addition, numerous specific details are set
forth to provide a thorough understanding of the embodiments
described herein. However, it will be understood by those of
ordinary skill in the art that the embodiments described herein can
be practiced without these specific details. In other instances,
methods, procedures, and components have not been described in
detail so as not to obscure the related relevant feature being
described. Also, the description is not to be considered as
limiting the scope of the embodiments described herein. The
drawings are not necessarily to scale and the proportions of
certain parts may be exaggerated to better illustrate details and
features of the present disclosure.
[0013] References to "an" or "one" embodiment in this disclosure
are not necessarily to the same embodiment, and such references
mean "at least one". The term "comprising", when utilized, means
"including, but not necessarily limited to"; it specifically
indicates open-ended inclusion or membership in a so-described
combination, group, series, and the like.
[0014] FIG. 1 illustrates a plurality of first participants 10 at a
first location and a single second participant 20 at a second
location. The first and second participants 10 and 20 are using an
asymmetrical video conferencing system 100 for video conferencing.
The asymmetric video conferencing system 100 comprises a panoramic
video conferencing device 110 and a head mounted video conferencing
device 120. The panoramic video conferencing device 110 is
connected to the head mounted video conferencing device 120 via the
network 130 and performs bidirectional communication. By way of
example and not limitation, the network 130 may comprise wired
and/or wireless transmission media, which may be in the form of a
private network or a public network such as the Internet, or a
combination of the two.
[0015] FIG. 2 illustrates a schematic structural diagram of the
panoramic video conference device 110 according to an embodiment.
The panoramic video conferencing device 110 comprises a
photographing device 112, a projection device 114, a display device
116, and a speaker device 118. The photographic device 112 may be
any type of imaging system for capturing images of the plurality of
first participants 10. In one embodiment, the photographic device
112 comprises a 360 degree camera 1121 and a microphone array 1122.
The 360 degree camera 1121 is configured to acquire panoramic video
of each of the first participants 10 sitting around the conference
table, and the microphone array 1122 is used for real-time sound
collection from a location to accurately detect a location of a
current speaker in the panoramic video (for example, anywhere in an
angle of 360 degrees). The projection device 114 and the display
device 116 are video output devices of the panoramic video
conferencing device 110 for displaying video data transmitted by
the head mounted video conferencing device 120 from the second
location. The projection device 114 may project the video data on a
wall or a display screen around the conference room, so that the
plurality of first participants 10 can view the video of the second
participant 20. The speaker device 118 is a voice output device of
the panoramic video conferencing device 110 for outputting voice
data transmitted by the head mounted video conferencing device 120
from the second location. To facilitate obtaining a frontal image
of each of the plurality of first participants 10, the panoramic
video conferencing device 110 may be disposed in the center of the
conference table at the first location. In general, a size of the
panoramic video conferencing device 110 should not be so large as
to obstruct a participant's view of other participants, so that the
plurality of first participants 10 can see each other in a
conference room. A height of the panoramic video conferencing
device 110 should be adjusted as needed by the plurality of first
participants 10. For example, in a video conference, the height of
the panoramic video conferencing device 110 may be adjusted
according to a height of the conference table and a seated height
of each of the plurality of first participants 10.
[0016] As shown in FIG. 2, in the embodiment, the photographing
device 112 is disposed at a position slightly higher than the
display device 116, and is approximately at the eye height of the
plurality of first participants 10. The projection device 114 is
disposed between the photographing device 112 and the display
device 116. The speaker device 118 can be integrated on a frame of
the display device 116. In one embodiment, a base together with a
support may be used to maintain relative positions of the camera
112, the projection device 114, the display device 116, and the
speaker device 118 in the panoramic video conferencing device 110.
In one embodiment, the position of one or more components in the
panoramic video conferencing device 110 is adjustable on the
support. In one embodiment, the panoramic video conferencing device
110 may further comprise a control component and a horizontal
rotation mechanism, such that the display device 116 and the
speaker device 118 may be rotated horizontally based on feedback of
the second participant 20 and/or locations of each of the plurality
of first participants 10.
[0017] FIG. 3 illustrates the head mounted video conferencing
device 120 according to an embodiment. The head mounted video
conferencing device 120 integrates the camera 122, the display
device 124, the earphone 126, and the microphone 127, and has
portability, so that the second participant 20 may participate in a
two-way video conference with any of the plurality of first
participations 10 in any environment. As shown in FIG. 3, the
camera 122 is disposed slightly below the display device 124. In
another embodiment, the camera 122 may also be disposed slightly
above the display device 124. In one embodiment, the camera 122 may
be mounted within the display device 124 such that the camera 122
and the display device 124 are located at approximately the same
height. In one embodiment, the camera 122 is located at an
approximate height of the eye of the second participant 20 to
assist the first participants 10 in having a more face-to-face user
experience in the video conference. In an embodiment, the head
mounted video conferencing device 120 may further comprise a
sensing device 128 for detecting an orientation, seated or
otherwise, of the second participant 20. In one embodiment, the
sensing device 128 comprises a tri-axial acceleration sensor and a
gyroscope that may detect angular velocity and angular changes
occurring at the head of the second participant 20.
[0018] In an embodiment, an operation mode of the asymmetric
videoconferencing system 100 may comprise a face-to-face
conversation mode and a general mode. The operation mode may be set
by an administrator of the asymmetric video conference system 100
before the video conference, or may be changed by the administrator
during the video conference, or may be changed by participants of
the video conference.
[0019] If the asymmetric video conferencing system 100 is set to
the face-to-face conversation mode, when the video conference
starts, in one embodiment, the panoramic video conferencing device
110 acquires panoramic video data of each of the plurality of first
participants 10 via the 360 degree camera 1121 of the camera device
112. A region of interest (ROI) is extracted from the panoramic
video data and locations of each of the plurality of first
participants 10 is acquired. In one embodiment, the ROI is
initially set to a human face. In another embodiment, the ROI can
also be set to comprise a head, shoulder, or other part of the body
in addition to the human face. In those embodiments, recognition of
the ROI in the panoramic video data may be accomplished using known
ROI recognition techniques (e.g., face recognition, image
recognition, or feature recognition techniques). For example, if
the ROI is set as the human face, the face recognition technology
is used in the panoramic video data to identify the ROI.
Improvements in ROI identification are not herein disclosed, a
detailed description of how to identify the ROI in the panoramic
video data is omitted. In another embodiment, the second
participant 20 can also change the setting of the ROI via a user
interface on the head mounted video conferencing device 120 and
feed back the settings of the ROI to the panoramic video
conferencing device 110. In an embodiment, the panoramic video
conferencing device 110 may obtain individual locations (for
example, through an angle of 360 degrees) of the first participants
through the identified ROI, when the ROI includes the human face.
In an embodiment, the panoramic video conferencing device 110 may
also perform sound source identification through the microphone
array 1122 of the photographing device 112 to obtain location of
the current speaker, that is, sound source location (for example,
through an angle of 360 degrees). In one embodiment, the panoramic
video conferencing device 110 may also use the face recognition
technology to acquire the individual identities of the first
participants 10 according to the pre-stored face image database,
with for example, a name of each of the first participants 10. The
panoramic video conferencing device 110 then transmits the ROI
video data, the individual locations of first participants 10, the
acquired identities, and the sound source location to the head
mounted video conferencing device 120.
[0020] After receiving the video data transmitted by the panoramic
video conferencing device 110, the head mounted video conferencing
device 120 selects a portion of the ROI video data corresponding to
one of the first participants 10 and displays the ROI video data on
the display device 124. In one embodiment, the head mounted video
conferencing device 120 can select a portion of the ROI video data
that is initially displayed according to a preset angle and
location of the each of the plurality of first participants 10. In
one embodiment, the head mounted video conferencing device 120 can
also use the sound source location transmitted by the panoramic
video conferencing device 110 and a 360 degree virtual sound field
technology to simulate audio from the sound source location. In one
embodiment, the head mounted video conferencing device 120 further
uses the individual location information and identity information
of each of the plurality of first participants 10 transmitted by
the panoramic video conferencing device 110 to establish an
indication map 400. Such indication map 400 is shown in FIG. 4, and
displayed on the display device 124 via a user interface. The
indication map 400 helps the second participant 20 to know the
identity of individuals of the plurality of first participants 10
and their relative locations. In an embodiment, the indication map
400 includes an "x" symbol 402 for indicating the location of the
second participant 20. An arrow symbol 404 pointing in a direction
can indicate facing direction of the second participant 20. A
speaker symbol 406 can indicate the location of a sound source,
that is, the location of the current speaker in the plurality of
first participants 10. The locations of individuals of the
plurality of first participants 10 who surround the conference
table together with the identities can also be shown. In one
embodiment, the indication map 400 may be displayed proximate to
the lower right corner of the display device 124. In general, the
indication map 400 may be displayed simultaneously with the video
data, but not so as to interfere with a main view of the video
data.
[0021] In one embodiment, the head mounted video conferencing
device 120 may further detect the angle of rotation of the head of
the second participant 20 via the sensing device 128. The detected
angle can be compared with the locations of each of the plurality
of first participants 10 by the head mounted video conferencing
device 120 to display the portion of the ROI video data on the
display device 124.
[0022] In one embodiment, the second participant 20 may also input
a voice command via the microphone 127. For example, a command of
"find a person G" can be given, or a gesture input of the second
participant 20 can be recognized via the camera 122, for example,
the second participant 20 pointing a finger to the location of the
person G on the left. The head mounted video conferencing device
120 can further determine, according to the result of the voice
recognition or the result of the gesture recognition, the identity
and location of the one of the plurality of first participants 10
specified by the second participant 20 and display the specified
ROI video data on the display device 124. In one embodiment, the
ROI video data transmitted by the panoramic video conferencing
device 110 is preset to include ROI video data of all of the
plurality of first participants 10. In one embodiment, the head
mounted video conferencing device 120 may further feed back the
specified participant information to the panoramic video
conferencing device 110 according to the participant information
specified by the second participant 20 (e.g., by specifying
location information) to enable the panoramic video conferencing
device 110 to transmit the ROI video data containing only the
specified participant, to further reduce the amount of data
transmitted by the network.
[0023] In one embodiment, the head mounted video conferencing
device 120 may also be set to a speaker mode. When set to the
speaker mode, the head mounted video conferencing device 120,
according to the received sound source location, that is, the
current speaker in the plurality of first participants 10, selects
a portion of the ROI video data corresponding to the sound source
location to display on the display device 124. Then the second
participant 20 can experience a face-to-face conversation with the
current speaker of the plurality of first participants 10.
[0024] In one embodiment, the display device 116 and the speaker
device 118 of the panoramic video conferencing device 110 may be
rotated by the angle of the head fed back by the second participant
20 or the location of one of the first participants 10 that the
second participant 20 desires to talk with. Thus, one of the
plurality of first participants 10 and the second participant 20
can have a more immersive and face-to-face conversation experience.
In one embodiment, the projection device 114 may simultaneously
project video data, so that other people of the plurality of first
participants 10 can see the video data at the same time.
[0025] In one scenario, the identity of one of the plurality of
first participants 10 transmitted by the panoramic video
conferencing device 110 may assist the second participant 20 of the
head mounted video conferencing device 120 to know the identities
of all participants. So, if there is a participant that the second
participant 20 does not know, such as person H, during the video
conference, the second participant 20 may point to location of the
person H by the angle of the head rotation, or by a voice or
gesture command, to clearly see the video data of the person H.
[0026] In one scenario, when the location of the current speaker of
the plurality of first participants 10 is not face-to-face with the
second participant 20, that is, if he does not appear on the
display device 124 of the head mounted video conferencing device
120, the second participant 20 can rotate his head to the position
(angle) of the analog sound source. Then the ROI video data of the
speaker is displayed on the display device 124 and the second
participant 20 can be face-to-face with him.
[0027] In one scenario, according to the identity information and
location information of the plurality of first participants 10
transmitted by the panoramic video conferencing device 110, the
second participant 20 may rotate his head, or via a voice or
gesture command, specify one of the plurality of first participants
10 to be talked to, then the one's ROI video data is displayed on
the display device 124. In this way, the second participant 20 can
talk to any person even if that person is not speaking.
[0028] The asymmetric video conferencing system 100 can be used
between a boss and an employee, or in any situation where a single
person wants to perform a video conference with other single
persons.
[0029] The above mentioned is the face-to-face conversation mode of
the asymmetric video conferencing system 100. In another
embodiment, the asymmetric video conferencing system 100 can also
be set to general mode. If the asymmetric video conferencing system
100 is set to the general mode, when the video conference starts,
the panoramic video conferencing device 110 supports a projection
function to project the video data transmitted by the head mounted
video conferencing device 120. The video data is also displayed on
the display device 116 at the same time. The video data transmitted
by the head mounted video conferencing device 120 can thus be seen
by all of the plurality of first participants 10.
[0030] When the asymmetric video conferencing system 100 is set to
the general mode, the display device 124 of the head mounted video
conferencing device 120 displays the panoramic video data
transmitted by the panoramic video conferencing device 110 or all
of the ROI video data of the plurality of the first participants
10.
[0031] Referring to FIG. 5, a process 500 of the panoramic video
conferencing device 110 is disclosed in accordance with one
embodiment. The step numbers provided in the process 500 are for
clarity of description, and do not represent a certain order. In
other embodiments, the operations of the steps may not be
implemented in the exact order shown.
[0032] The process 500 begins by receiving an instruction to start
a video conference. Step 502, the panoramic video conferencing
device 110 acquires panoramic video data via a 360 degree camera
1121 of the photographing device 112.
[0033] Step 504, identifies the ROI, extracts the video data of the
ROI in the panoramic video data, and further acquires the
individual locations of the plurality of first participants 10
according to the identified ROI. In this embodiment, the ROI is
initially set to a human face. Taking the plurality of first
participants 10 as an example, the ROI video data extracted by the
panoramic video conferencing device 110 comprises face information
of the plurality of first participants 10. In another embodiment,
the ROI could also be set to comprise a head, shoulder, or other
part of the body. In another embodiment, the second participant 20
could also change the setting of the ROI via a user interface and
feed back the settings of the ROI to the panoramic video
conferencing device 110.
[0034] Step 506, the panoramic video conferencing device 110
performs sound source identification through the microphone array
1122 of the photographing device 112, and acquires sound source
location.
[0035] Step 508, the panoramic video conferencing device 110
utilizes the face recognition technology to acquire the identities
(for example, names) of the first participants 10 according to the
pre-stored face image database.
[0036] Step 510, the panoramic video conferencing device 110
transmits the ROI video data, the sound source location, the
individual identities and the individual locations of the first
participants 10 to the head mounted video conferencing device
120.
[0037] Step 512, the panoramic video conferencing device 110
further determines whether a specified location message is
received. If the panoramic video conferencing device 110 receives
the message, it changes to extract only the ROI video data of the
specified location, and returns to step 502 to continue the video
conference. If the panoramic video conferencing device 110 does not
receive the message, then in step 516, it further determines
whether an instruction to end the video conference is received. If
the instruction to end the video conference is received, the
process 500 terminates; otherwise, return to step 502 to continue
the video conference.
[0038] Referring to FIG. 6, which illustrates an operational
process 600 of the panoramic video conferencing device 120 is
disclosed in accordance with one embodiment. The step numbers
provided in the process 600 are for clarity of description, and do
not represent a certain order. In other embodiments, the operations
of the steps may not be implemented in the exact order shown.
[0039] The process 600 begins by receiving an instruction to start
a video conference. Step 602, the head mounted video conferencing
device 120 receives the ROI video data, the sound source location,
and the individual identities and the individual locations of the
first participants 10.
[0040] Step 604, establishes an indication map according to the
received sound source location and the individual identities and
the individual locations of the first participants 10.
[0041] Step 606, displays the ROI video data and the indication map
on the display device 124. In one embodiment, the head mounted
video conferencing device may display a portion of the ROI video
data according to a preset angle and the individual locations.
[0042] Step 608, simulates audio from the received sound source
location by using a 360 degree virtual sound field technology.
[0043] Step 610, detects a head rotation angle of the second
participant 20 via the sensing device 128, and compares the
detected head rotation angle with the received individual locations
of the first participants 10. In comparison, it is determined
whether the second participant 20 has given the specified location
command. If the second participant 20 gives the specified location
command, then in step 612, a specified location message is
transmitted to the panoramic video conferencing device 110;
otherwise, step 614 is executed to determine whether an instruction
to end the video conference is received. In another embodiment, the
head mounted video conferencing device 120 cloud determine one of
the plurality of first participants 10 that to second participant
want to talk and/or view according to the detected angle of
rotation of the head of the second participant 20. The ROI video
data of the one of the first participant 10 that is to be viewed is
displayed on the display device 124. In another embodiment, the
video conferencing device 120 could receive a voice command via the
microphone 127 or receive a gesture command via the camera 122 to
confirm the video data that the second participant 20 wants to
view.
[0044] Step 614, determines whether an instruction to end the video
conference is received. If received an instruction to end the video
conference, the process 600 terminates; otherwise, returns to step
602 to continue the video conference.
[0045] In summary, the asymmetric video conferencing system 100
comprises the asymmetric panoramic video conferencing device 110
and the head mounted video conferencing device 120. The panoramic
video conferencing device 110 transmits only the ROI video data to
the head mounted video conferencing device 120 instead of the
panoramic video data to reduce the network transmission data. The
head mounted video conferencing device 120 could feedback the ROI
information further reduces the amount of network traffic.
[0046] The embodiments shown and described above are only examples.
Many other details are often found in such art. Therefore, many
such details are neither shown nor described. Even though numerous
characteristics and advantages of the present technology have been
set forth in the foregoing description, together with details of
the structure and function of the present disclosure, the
disclosure is illustrative only, and changes may be made in the
detail, especially in matters of shape, size, and arrangement of
the parts within the principles of the present disclosure, up to
and including the full extent established by the broad general
meaning of the terms used in the claims. It will therefore be
appreciated that the embodiments described above may be modified
within the scope of the claims.
* * * * *