发明授权
US6160847A Detection mechanism for video channel underflow in MPEG-2 video decoding
失效
MPEG-2视频解码中视频通道下溢的检测机制
- 专利标题: Detection mechanism for video channel underflow in MPEG-2 video decoding
- 专利标题(中): MPEG-2视频解码中视频通道下溢的检测机制
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申请号: US106049申请日: 1998-06-26
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公开(公告)号: US6160847A公开(公告)日: 2000-12-12
- 发明人: Scarlett Wu , Arvind Patwardhan , Youichi Obana
- 申请人: Scarlett Wu , Arvind Patwardhan , Youichi Obana
- 申请人地址: CA Milpitas
- 专利权人: LSI Logic Corporation
- 当前专利权人: LSI Logic Corporation
- 当前专利权人地址: CA Milpitas
- 主分类号: G06T9/00
- IPC分类号: G06T9/00 ; H04N21/6332 ; H04N21/654 ; H04N7/12 ; H04N11/02 ; H04N11/04
摘要:
A method and system for displaying a series of video frames so that picture corruption from video channel underflows is avoided. The method comprises the steps of receiving a data stream with compressed video data for the series of video frames, storing the compressed video data in a channel buffer, processing a video frame if sufficient compressed video data for the video frame is stored in the channel buffer, and displaying a preceding video frame if insufficient compressed video data for the video frame is stored in the channel buffer. The system, which displays a series of video frames, also addresses the issue of video channel underflow. The video frames are received as compressed video data in a data stream that also includes size parameters, such as the vbv.sub.-- delay parameter in the frame headers of MPEG frames, for each video frame in the series of video frames. The system comprises an input for receiving a data stream, a channel buffer for storing the compressed video data, a decoder that decodes the compressed video data and provides the decoded video data to a display device, and an underflow detector that compares the amount of compressed video data in the channel buffer to the required amount of compressed video data. If the amount of compressed video data in the channel buffer is less than the required amount, the decoder to pause before decoding the frame until a sufficient amount of compressed video data is available.
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