发明名称 Automatic Display Latency Measurement System for Video Conferencing
摘要 Methods and systems that compensate for display latency when separate speakers are used during video conferencing. A method includes determining whether speakers, which are not controlled by a display, are to be used in connection with a video conferencing session. The method further includes sending, to the display, data that causes the display to generate a predetermined pattern, capturing imagery of the effects of the predetermined pattern shown on the display, calculating a latency of the display based on a difference in a time the data was sent and the imagery of the effects is received, and storing a value of the latency of the display in a device that enables the video conferencing. When the speakers, which are not controlled by the display are selected, are selected, the audio portion of the video conferencing session is redirected to those speakers, but delayed for an amount of time substantially equivalent to the value of the latency of the display. In this way audio and video synchronization may be improved.
申请公布号 US2011018959(A1) 申请公布日期 2011.01.27
申请号 US20090509870 申请日期 2009.07.27
申请人 CISCO TECHNOLOGY, INC. 发明人 FRIEL JOSEPH T.;GRAHAM PHILIP R.;WALES RICHARD T.;SUNDSBARM TOR A.;RANDALL PAUL J.
分类号 H04N7/15 主分类号 H04N7/15
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