| 摘要 |
Apparatus and method for generating video picture adjustment signals in a VCR. The apparatus comprises a VCR head for detecting a video signal from a VCR tape, a double peaking and amplifying circuit for peaking and amplifying a luminance signal component of the detected video signal corresponding to a recording frequency band of a super tape to output a first peaked and amplified signal and peaking and amplifying a luminance signal component of the detected video signal corresponding to both the recording frequency band of the super tape and a recording frequency band of a normal tape to output a second peaked and amplified signal, first and second DC voltage converting circuits for converting the first and second peaked and amplified signals into first and second DC voltage signals, an adding circuit for adding the first and second DC voltage signals to obtain an automatic video picture tracking adjustment signal, a clamping circuit for clamping the added signal from the adding circuit at a predetermined voltage to obtain an automatic video picture sharpness adjustment signal, a first comparison circuit for obtaining an instruction signal for performance of a rental function, and a second comparison circuit for obtaining a signal for discriminating the type of the VCR tape.
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