Eliminating the low-frequency chrominance signal for tracking in

Details Eliminating the low-frequency chrominance signal for tracking in Eliminating the low-frequency chrominance signal for tracking in

1982-10-08

1985-10-22

Faber, Alan

Facsimile and static presentation processing

Facsimile

Recording apparatus

358327, 358320, 360 77, G11B 2110, H04N 592

Patent

active

045492263

ABSTRACT:
An automatic tracking apparatus, by which a tracking condition of reproducing heads and a recorded track can be automatically adjusted. This apparatus has a rotary heads, an envelope detector, and a filter. A tracking error signal is generated by detecting the envelope of a video signal which does not contain chrominance signal components, the video signal being derived from the rotary heads. As a result, the tracking error signal includes only the luminance signal but does not include the signal from the next track. Therefore, the envelope signal is a good tracking error signal which is only responsive to the signal level of the objective track.

REFERENCES:
patent: 4141047 (1979-02-01), Kambara et al.
patent: 4151570 (1979-04-01), Ravizza et al.
patent: 4172265 (1979-10-01), Sakamoto et al.
patent: 4344082 (1982-08-01), Ishiodori
patent: 4402006 (1983-08-01), Karlock
Shiraishi et al.; Video Cassette Recorder Development for Consumers; Aug. 1978; IEEE Transactions on Consumer Electronics, vol. CE-24, No. 3, pp. 468-472.

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