发明授权
US5699470A Apparatus for recording and reproducing video signals with recording of
frequency converted subsampled chrominance signals
失效
用于通过记录频率转换的二次采样色度信号来记录和再现视频信号的装置
- 专利标题： Apparatus for recording and reproducing video signals with recording of frequency converted subsampled chrominance signals
- 专利标题（中）： 用于通过记录频率转换的二次采样色度信号来记录和再现视频信号的装置
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申请号： US983734申请日： 1992-12-01
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公开(公告)号： US5699470A公开(公告)日： 1997-12-16
- 发明人: Takashi Honda , Dai Sato
- 申请人： Takashi Honda , Dai Sato
- 申请人地址： JPX Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX3-332119 19911216; JPX3-357321 19911225; JPX3-360509 19911227
- 主分类号： H04N9/79
- IPC分类号： H04N9/79 ; H04N9/83
摘要：
In an apparatus for processing an input video signal that includes a chrominance signal and a luminance signal, the luminance signal is frequency-modulated and the chrominance signal is subsampled, preferably by field-offset subsampling, whereupon, the subsampled chrominance signal is frequency-converted to a lower frequency band than the frequency band of the frequency-modulated luminance signal. The frequency-modulated luminance signal and the frequency-converted subsampled chrominance signal are then combined and the resulting combined signal is recorded on a recording medium such as a magnetic tape. During reproduction of the recorded signal, interpolation among frames is used to reconstruct the chrominance signal. Recording of the frequency-converted subsampled chrominance signal allows for space-efficient recording of the video signal while providing a reproduced chrominance signal that has a relatively wide bandwidth, thereby permitting improved color reproducibility.