| 摘要 |
The adaptive video signal encoder and decoder includes an A/D converter for converting video signal to digital signal, a spatial low-pass filter for dividing spatial brightness signal from digital video signal, a low-pass filter for detecting spatial brightness signal in bandwidth of recording tape, a soft switch for mixing spatial brightness signal in the bandwidth and time brightness signal, a frequency overlapping circuit for damping brightness signal level appropriately mixing the damped signal and brightness signal in the bandwidth and a D/A converter for converting mixed signal to analog signal.
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