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公开(公告)号：EP2502155A4
公开(公告)日：2013-12-04
申请号：EP11840587
申请日：2011-11-11
申请人： POLYCOM INC
发明人： FENG JINWEI , CHU PETER , BOTZKO STEPHEN
IPC分类号： G06F15/16 , G10L19/002 , G10L19/02 , G10L19/24
CPC分类号： G10L19/002 , G10L19/0212 , G10L19/24 , G10L25/18 , H04M3/568 , H04M7/0072
摘要： Use of a scalable audio codec to implement distributed mixing and/or sender bit rate regulation in a multipoint conference is disclosed. The scalable audio codec allows the audio signal from each endpoint to be split into one or more frequency bands and for the transform coefficients within such bands to be prioritized such that usable audio may be decoded from a subset of the entire signal. The subset may be created by omitting certain frequency bands and/or by omitting certain coefficients within the frequency bands. By providing various rules for each endpoint in a conference, the endpoint can determine the importance of its signal to the conference and can select an appropriate bit rate, thereby conserving bandwidth and/or processing power throughout the conference.
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公开(公告)号：EP1425909A4
公开(公告)日：2006-10-18
申请号：EP02761322
申请日：2002-08-07
申请人： POLYCOM INC
发明人： KENOYER MICHAEL , MALLOY CRAIG , WASHINGTON RICHARD , CHU PETER
摘要： A system and method for high resolution video conferencing is shown and described. A transmitting station (102) and a receiving station (104) including video cameras (110/116) or sensors, a plurality of microphones (214) and speakers (210a-210d), video (310), audio (312), and communication (318) processing engines are disclosed. Video is processed and transferred through the system allowing for multiple video streams to be produced and audio is processed and transferred through the system allowing for sound to be played back with an indication of position in relation to the videoconferencing system.
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