lllllllllllllllllllllllllllIlllllllllllllllllllllllllllllllllllIIIIIIIHIII _ USO05434913A UIlltBd States Patent [19] [11] Patent Number: 5,434,913 Tung et a1. [45] Date of Patent: Jul. 18, 1995 [54] AUDIO SUBSYS'I'EM FOR COMPUTER-BASED CONFERENCING SYSTEM OTHER PUBLICATIONS Computer Conferencing: IBM scientists demo proto type of affordable computer conferencing system, Nov. [75] Inventors: Peter Tung, Beaverton; Ben Vrvilo, 2’ 1992_ EDGE’ on & about AT&T’ V7, 11223’ p, 22_ Portland, both of Greg. Primary Examiner—.larnes L. Dwyer [73] Assignee: Intel Corporation, Santa Clara, Calif. Assistant Examiner-Scott Wolinsky [21] A 1 N 158 246 Attorney, Agent, or Firm—-Steve Mendelsohn; William pp . 0.: , H. Murray [22] Filed: Nov. 24, 1993 [57] ABSTRACI‘ [51] Int. 01.6 ............................................ .. HD4M 3/56 An audi° task ,residing °n 3,11 audio/communicating [52] us. (:1. .................................. .. 379/202; 395/800; Pwd °f a“ “(11° ‘Subsystem “1 a COmPuF“ °°Y%fe“?“°' 395/162 ing system. An audio manager and an audio applications [58] Field of Search ______________ u 395/800’ 162; 379/202, programming interface reside on a host processor of: the 379/205 203 204 computer conferencing system. The audio task receives ’ ’ local analog audio signals, generates local compressed [56] References Cited audio signals corresponding to the local analog audio U S PATENT DOCUMENTS signals, and passes the local compressed audio signals to ' ‘ ' a communications subsystem of the computer confer 4,475,l93 10/1984 Brown ....................... .. 379/202 encing system for transmission over a communications 4,333,795 12/1989 AndO e} 31 -- 379/53 link to a remote computer conferencing system. The 5,014,267 5/1991 Tompi‘ms ct a1‘ " """"" " 370/62 audio task receives remote compressed audio signals snuzuktllet a1‘ """""""" from the communications subsystem and generates re 5Z231Z492 7/1993 Dangig:al:":::............12: 358/143 mote decompress“ audio Signals correspmding to the 5,315,633 5/1994 remote compressed audio signal for local playback. 5,319,793 6/1994 5,335,321 8/1994 16 Claims, 32 Drawing Sheets 102 102 104 CANERA MICROPHONE CANERA MICROPHONE ANALOG ANALOG ANALOG ANALOG VIDEO AUDIO VIDEO AUDIO V V V V 100 ' 100 1 CONFERENCING ISDN NETWORK CONFERENCING f SYSTEN SYSTEN A (DIGITAL) B 1 1 0 ANALOG ANALOG ANALOG ANALOG VIDEO AUDIO VIDEO AUDIO V l l V KINITOR SPEAKER NONITOR SPEAKER 106 108 106 108 CISCO SYSTEMS, INC. Ex. 1031 Page 1
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UIlltBd States Patent [19] [11] Patent Number: 5,434,913 Tung et a1. [45] Date of Patent: Jul. 18, 1995
[54] AUDIO SUBSYS'I'EM FOR COMPUTER-BASED CONFERENCING SYSTEM
OTHER PUBLICATIONS
Computer Conferencing: IBM scientists demo proto type of affordable computer conferencing system, Nov.
[75] Inventors: Peter Tung, Beaverton; Ben Vrvilo, 2’ 1992_ EDGE’ on & about AT&T’ V7, 11223’ p, 22_ Portland, both of Greg.
Primary Examiner—.larnes L. Dwyer [73] Assignee: Intel Corporation, Santa Clara, Calif. Assistant Examiner-Scott Wolinsky [21] A 1 N 158 246 Attorney, Agent, or Firm—-Steve Mendelsohn; William
395/162 ing system. An audio manager and an audio applications [58] Field of Search ______________ u 395/800’ 162; 379/202, programming interface reside on a host processor of: the
379/205 203 204 computer conferencing system. The audio task receives ’ ’ local analog audio signals, generates local compressed
[56] References Cited audio signals corresponding to the local analog audio U S PATENT DOCUMENTS signals, and passes the local compressed audio signals to
' ‘ ' a communications subsystem of the computer confer
4,475,l93 10/1984 Brown ....................... .. 379/202 encing system for transmission over a communications 4,333,795 12/1989 AndO e} 31 -- 379/53 link to a remote computer conferencing system. The 5,014,267 5/1991 Tompi‘ms ct a1‘ " """"" " 370/62 audio task receives remote compressed audio signals
snuzuktllet a1‘ """""""" from the communications subsystem and generates re 5Z231Z492 7/1993 Dangig:al:":::............12: 358/143 mote decompress“ audio Signals correspmding to the 5,315,633 5/1994 remote compressed audio signal for local playback. 5,319,793 6/1994 5,335,321 8/1994 16 Claims, 32 Drawing Sheets
102 102 104
CANERA MICROPHONE CANERA MICROPHONE
ANALOG ANALOG ANALOG ANALOG
VIDEO AUDIO VIDEO AUDIO
V V V V
100 ' 100 1 CONFERENCING ISDN NETWORK CONFERENCING f
SYSTEN SYSTEN
A (DIGITAL) B
1 1 0
ANALOG ANALOG ANALOG ANALOG
VIDEO AUDIO VIDEO AUDIO
V l l V
KINITOR SPEAKER NONITOR SPEAKER
106 108 106 108
CISCO SYSTEMS, INC. Ex. 1031 Page 1
CISCO SYSTEMS, INC. Ex. 1031 Page 2
US. Patent July 18, 1995 Sheet 2 of 32 5,434,913
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U.S. Patent July 18, 1995 Sheet 3 of 32 5,434,913
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CISCO SYSTEMS, INC. Ex. 1031 Page 4
CISCO SYSTEMS, INC. Ex. 1031 Page 5
US. Patent July 18, 1995 Sheet 5 of 32 Y 5,434,913
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502 AUDIO/VIDEO DATA CONFERENCING 5 04 CONFERENCING APPN APPLICATION
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