ERROR OF TIME AXIS CORRECTING DEVICE

摘要

PURPOSE:To attain highly accurate and stable time axis error correction by forming a means for shifting the phase of a phase synchronizing signal in accordance with a speed error correcting signal and obtaining a phase correcting clock signal and a means for A/D converting a reproduced video signal on the basis of the phase correcting clock signal. CONSTITUTION:The 2nd phase shifter 8 selects a clock signal from a phase synchronizing clock signal and a delay clock signal delayed in each 1/8 clock in accordance with a speed error correcting signal to obtain a phase correcting clock signal. An A/D converter 3 A/D converts a reproduced video signal on the basis of the phase correcting clock signal to control writing in a memory device 10. Reading from the memory device 10 and the operation of a D/A converter 11 are controlled by a reference clock signal and a reproduced video signal removed at its time axis error component is outputted to an output terminal 12. The reproduced video signal is A/D converted and the digital signal is written in the memory device and read out by the reference clock signal to execute D/A conversion. Consequently, time axis variation can be removed with rapid follow-up and highly accuracy and stability.