Methods for monitoring and modifying a trick play data stream to insure
MPEG compliance
    51.
    发明授权
    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

    公开(公告)号:US5793927A

    公开(公告)日:1998-08-11

    申请号:US481022

    申请日:1995-06-07

    申请人: Frank Lane

    发明人: Frank Lane

    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.

    摘要翻译: 公开了用于确保特技播放数据流(例如用于快进或反向重放操作的数据流)符合预选数据标准,特别是MPEG-2标准的方法和装置。 描述了用于生成从正常播放数据蒸汽产生的特技播放数据流的PCR,PTS和DTS值的各种方法,并且用于在磁带的特技播放段中进行记录。 所描述的方法包括产生新的PCR,PTS和DTS值作为要读取数据的特技播放速度的函数。 还公开了在特技重放操作期间从带读取的用于校正PCR,PTS和DTS值的方法和装置。 所公开的方法涉及生成新的PCR,PTS和DTS以提供符合MPEG-2的比特流。 所描述的方法和装置适用于能够实现包括光盘的特技播放的多个存储和重放装置。