发明授权
US5793927A Methods for monitoring and modifying a trick play data stream to insure
MPEG compliance
失效
用于监视和修改特技播放数据流以确保符合MPEG的方法
- 专利标题: Methods for monitoring and modifying a trick play data stream to insure MPEG compliance
- 专利标题(中): 用于监视和修改特技播放数据流以确保符合MPEG的方法
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申请号: US481022申请日: 1995-06-07
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公开(公告)号: US5793927A公开(公告)日: 1998-08-11
- 发明人: Frank Lane
- 申请人: Frank Lane
- 申请人地址: NY Tarrytown
- 专利权人: Hitachi America, Ltd.
- 当前专利权人: Hitachi America, Ltd.
- 当前专利权人地址: NY Tarrytown
- 主分类号: H04N5/783
- IPC分类号: H04N5/783 ; G11B15/087 ; G11B15/18 ; G11B15/467 ; G11B20/10 ; G11B27/00 ; G11B27/10 ; G11B27/30 ; H04N5/7826 ; H04N5/92 ; H04N5/926 ; H04N5/945 ; H04N7/26 ; H04N9/804 ; H04N9/82
摘要:
Methods and apparatus for insuring that a trick play data stream, e.g., a stream of data used for fast forward or reverse playback operation, complies with preselected data standards and in particular the MPEG-2 standard are disclosed. Various methods are described for generating PCR, PTS and DTS values for a trick play data stream, which is generated from a normal play data steam, and is intended for recording in trick play segments of a tape. The described methods include generating new PCR, PTS and DTS values as a function of the trick play speed at which the data is intended to be read back. Methods and apparatus for correcting PCR, PTS and DTS values read from a tape during trick playback operation are also disclosed. The disclosed methods are directed to generating new PCRs, PTSs and DTSs to provide am MPEG-2 compliant bitstream. The described methods and apparatus are applicable to a plurality of storage and playback devices capable of implementing trick play including compact disks.
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