发明申请
- 专利标题: INSTANTANEOUS DECODER REFRESH FRAME ALIGNED MULTI-BITRATE TRANSCODER OUTPUT
- 专利标题(中): 瞬态解码器刷新帧对齐多位转换器输出
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申请号: US13209490申请日: 2011-08-15
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公开(公告)号: US20130044803A1公开(公告)日: 2013-02-21
- 发明人: Yuval Fisher , Hain-Ching Liu , Dan R. Hunt , Shankar Venkataraman , Hsiang-Yun Alex Huang
- 申请人: Yuval Fisher , Hain-Ching Liu , Dan R. Hunt , Shankar Venkataraman , Hsiang-Yun Alex Huang
- 申请人地址: US CA Sunnyvale
- 专利权人: RGB Networks, Inc.
- 当前专利权人: RGB Networks, Inc.
- 当前专利权人地址: US CA Sunnyvale
- 主分类号: H04N7/40
- IPC分类号: H04N7/40 ; G06F15/16
摘要:
A video stream is transcoded to provide a plurality of primary profiles. Individual frames of the video stream have a Presentation Time Stamp (PTS). A PTS is used as a token to identify particular frames to be encoded as Instantaneous Decoder Refresh (IDR) frames in each profile. An IDR frame period is determined, indicative of a desired number of video frames between two IDR frames. An IDR frame is inserted into each profile every IDR frame period. The IDR frames of each profile are aligned with the same IDR frames of the other profiles. The PTS of each IDR frame in each profile is monitored. Upon determining that a PTS is out of alignment, the next PTS of the affected profile is aligned with the corresponding PTS of remaining profiles. Backup transcoders produce backup profiles that are maintained in alignment with each other and with the primary profiles.
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