| 摘要 |
A circuit for improving picture quality in a television receiver adapted to receive video signals, with light picture areas corresponding to a high video signal level bounded by inclined rising and falling edges comprising, circuit elements for producing a differentiated video signal from the received video signal having positive and negative peaks at the inclined rising and falling edges of the received video signal respectively, circuit elements for inverting the differentiated video signal and clipping the negative pulse thereof, and circuit elements for adding the inverted and clipped differentiated signal to the received video signal whereby the falling edge of the received video signal is enhanced and the picture quality is improved.
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