发明授权
US08279946B2 System and method for providing a variable frame rate and adaptive frame skipping on a mobile device
有权
用于在移动设备上提供可变帧率和自适应跳帧的系统和方法
- 专利标题: System and method for providing a variable frame rate and adaptive frame skipping on a mobile device
- 专利标题(中): 用于在移动设备上提供可变帧率和自适应跳帧的系统和方法
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申请号: US11944549申请日: 2007-11-23
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公开(公告)号: US08279946B2公开(公告)日: 2012-10-02
- 发明人: David Mak-Fan , Aaron B. Small , Thomas C. Nagy
- 申请人: David Mak-Fan , Aaron B. Small , Thomas C. Nagy
- 申请人地址: CA Waterloo
- 专利权人: Research In Motion Limited
- 当前专利权人: Research In Motion Limited
- 当前专利权人地址: CA Waterloo
- 代理机构: Blake, Cassels & Graydon LLP
- 代理商 Brett J. Slaney
- 主分类号: H04N7/12
- IPC分类号: H04N7/12
摘要:
A processor and method are provided for decoding a multimedia file having video and audio data streams that are configured to be played in synchronization. Frames of the video stream are decoded and played with the audio and, to compensate for saturation of the processor usage, two procedures are performed. The first procedure operates at a first periodic interval and slows down the frame rate to reduce processor usage if needed. The second procedure first attempts to speed up the video to catch up to the audio if they are out of sync and if this cannot be done in the next time interval, the decoding of a select number of frames is skipped such that the video and audio data streams are resynchronized.
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