发明名称 |
Video recording device compatible transmitter |
摘要 |
A device for transmitting digital packetized video and audio data is disclosed. The transmitter includes a video encoder, a prioritizer, and a packetizer. The video encoder receives video signals and encodes the video signals into a digital video data stream including codewords. The video encoder also generates motion vectors and fully intra-coded video frames for use by a video tape recorder during trick play operation. The prioritizer is coupled to the video encoder. The prioritizer receives the digital video data stream and prioritizes the video data according to a preselected prioritization scheme optimized for identifying data useful to video tape recorder trick play operation. The preselected prioritization scheme assigns the video codewords in the video data stream to a priority level according to the utility of each video codeword for video tape recorder recording and playback operation and outputs both the video codewords and a priority level signal. The video codewords and the priority level signal are supplied to a transport packetizer which packetizes the video codewords and associates a header with each packet. The headers contain information identifying the assigned priority level of the codewords in each packet. This makes it possible for a video tape recorder receiving the video packets to determine the utility of the codewords in a given packet from the priority level information in the packet headers.
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申请公布号 |
US5805762(A) |
申请公布日期 |
1998.09.08 |
申请号 |
US19940228949 |
申请日期 |
1994.04.18 |
申请人 |
HITACHI AMERICA, LTD. |
发明人 |
BOYCE, JILL MACDONALD;FUHRER, JACK SELIG;HENDERSON, JOHN GOODCHILDE NORIE;LANE, FRANK ANTON;PLOTNICK, MICHAEL ALLEN |
分类号 |
G11B5/008;G11B15/12;G11B15/18;G11B15/467;H04N5/00;H04N5/7826;H04N5/783;H04N7/24;H04N7/26;H04N7/30;H04N7/46;H04N7/50;H04N7/52;H04N9/804;H04N9/82;(IPC1-7):H04N5/91 |
主分类号 |
G11B5/008 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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