发明公开
- 专利标题: Digital VCR with non-standard speed playback
- 专利标题(中): 具有非标准速度播放的数字录像机
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申请号: EP02005180.1申请日: 1995-04-03
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公开(公告)号: EP1211897A2公开(公告)日: 2002-06-05
- 发明人: Saeki, Tomoki , Kaneuchi, Toshio
- 申请人: RCA THOMSON LICENSING CORPORATION
- 申请人地址: CN 5312, Two Independence Way Princeton, NJ 08540 US
- 专利权人: RCA THOMSON LICENSING CORPORATION
- 当前专利权人: RCA THOMSON LICENSING CORPORATION
- 当前专利权人地址: CN 5312, Two Independence Way Princeton, NJ 08540 US
- 代理机构: Schäferjohann, Volker Willi, Dipl.-Phys.
- 优先权: GB9407283 19940413; GB9407287 19940413; GB9410309 19940523
- 主分类号: H04N5/783
- IPC分类号: H04N5/783
摘要:
A digital video cassette recorder records a high definition signal having an MPEG compatible structure, such as a proposed Grand Alliance signal. In the recorded format an advanced television frame occupies ten recorded tracks. Reproduction at speeds other than the recorded speed is termed "Trick Play". Reproduction in a "Trick Play" mode necessitates a reproducing head crossing a plurality of recorded tracks. However, since the advanced television signal is structured as groups of pictures comprising one intraframe coded frame and a plurality of predicted frames, many of the recorded tracks contain data representing predicted frames. Thus an advanced television signal reproduced in "Trick Play" may represent a jumble of unrelated data segments. Operation in "Trick Play" may be facilitated by the selection of predetermined replay speeds and the allocation of specific locations within each track from which data may be reproduced. These specific track locations are utilized during recording to place advanced television image data for reproduction during "Trick Play" operation. For generating the "Trick Play" image data the digital video image representative signal is compressed to have a data rate suitable for recorded placement at the specific track locations. The data for the digital video image representative signal and the "Trick Play" image data are multiplexed for recorded placement on said magnetic tape (504) such that said "Trick Play" image data is located at said specific track locations.
公开/授权文献
- EP1211897B1 Digital VCR with non-standard speed playback 公开/授权日:2003-08-20
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