| 摘要 |
An apparatus for generating a carrier frequency suitable for frequency band conversion of a color signal in a digital color signal processing circuit of a video tape recorder includes an adder, an integrator and a memory device. The adder combines a first phase variation amount signal, which can be obtained with respect to a change in a horizontal sync signal, to a second phase variation amount signal, which can be obtained with respect to a change in a color burst signal. The integrator integrates the resultant phase variation amount signal, and generates a phase value signal. The memory, which in an exemplary case can be a read only memory (ROM), then provides a carrier signal corresponding to the phase value signal output by the integrator. Thus, the required carrier for digital processing of the color signal can be generated using a simpler structure., e.g., without the use of a multiplier and a band-pass filter.
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