| 摘要 |
<p>A reference signal generator used to compensate for a time base error of a color video signal reproduced from a video tape recorder having a memory into which the color video signals are written in response to a write clock and from which the color video signals are read in response to a read clock and a read start pulse, comprises a color frame detector adapted to detect a color framing condition from a reference sync. (synchronizing) signal and a reference burst signal and to generate a color framing indicating signal. Also included are a first phase controller for controlling a phase of chrominance subcarrier signal in response to a subcarrier phase control signal, the chrominance subcarrier signal being phaselocked with the reference burst signal, a second phase controller for controlling a phase of the reference sync. signal in response to a sync. phase control signal and the subcarrier phase control signal, and a read start signal generator circuit responsive to the color framing indicating signal, the phase-controlled chrominance subcarrier signal and the phase-controlled reference sync. signal for generating the read start pulse to be supplied to the memory of the video tape recorder.</p> |
