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VIDEO TRANSMISSION APPARATUS EMPLOYING INTRA-FRAME-ONLY VIDEO COMPRESSION THAT IS MPEG-2 COMPATIBLE
VIDEO TRANSMISSION APPARATUS EMPLOYING INTRA-FRAME-ONLY VIDEO COMPRESSION THAT IS MPEG-2 COMPATIBLE
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机译：使用MPEG-2兼容的仅帧内视频压缩的视频传输设备
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摘要
VIDEO TRANSMISSION APPARATUS EMPLOYING INTRAFRAME-ONLYVIDEO COMPRESSION THAT IS MPEG-2 COMPATIBLEIntraframe-only video compression encoding of every successive video frameis done the way intraframe video compression encoding is done on I anchorframes inMPEG-2, and each frame is identified as being intraframe video compressionencodedsimilarly to the way it is done on x anchor frames in MPEG-2. The encoder fordoingthis is simpler than that for coding P frames and B frames as well as Iframes, sincethere is no need for motion estimation circuitry. Using such an encoder in adigitalcamcorder reduces power drain on the battery and permits the weight and sizeof thecamcorder to be reduced. Intraframe-only video compression facilitates editingvideo.In many systems in which video editing is done an MPEG-2 decoder is alreadyavailable, so there is no additional cost for a decoder to decode thetransport stream ofI Frames without intervening P or B frames. If an MPEG-2 decoder is notalreadyavailable in a system, providing such a decoder is reasonable in cost, sincethe amountof hardware in an MPEG-2 decoder is considerably less than that in an MPEG-2encoder.47
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