发明授权
US08599235B2 Automatic display latency measurement system for video conferencing
有权
用于视频会议的自动显示延迟测量系统
- 专利标题: Automatic display latency measurement system for video conferencing
- 专利标题(中): 用于视频会议的自动显示延迟测量系统
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申请号: US12509870申请日: 2009-07-27
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公开(公告)号: US08599235B2公开(公告)日: 2013-12-03
- 发明人: Joseph T. Friel , Philip R. Graham , Richard T. Wales , Tor A. Sundsbarm , Paul J. Randall
- 申请人: Joseph T. Friel , Philip R. Graham , Richard T. Wales , Tor A. Sundsbarm , Paul J. Randall
- 申请人地址: US CA San Jose
- 专利权人: Cisco Technology, Inc.
- 当前专利权人: Cisco Technology, Inc.
- 当前专利权人地址: US CA San Jose
- 代理机构: Edell, Shapiro & Finnan, LLC
- 主分类号: H04N7/14
- IPC分类号: H04N7/14
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.