| 摘要 |
<p>The picture quality is improved in video recorders through use of a band width compression by the operation-adaptive spectrum folding procedures associated with the recording and playback of colour video signals. The video input (10) leads to a Y/C separator (1) which separates the luminance and chrominance components of the composite signal. An operation-adaptive free filter (3) separates the luminance signal dependent upon the level of movement. A generator (6) produces spectrum folding carrier signals dependent on the output from the filter (3). Other circuits includes a low pass filter (5), a FM modulator (7), an adder (12), to provide output signal to the tape head, a low pass filter (9), and a processor (8) to combine the colour signal and tape modulation signal.</p> |
