Video disc encoding and decoding system providing intra-field tr

Details Video disc encoding and decoding system providing intra-field tr Video disc encoding and decoding system providing intra-field tr

1983-11-30

1985-10-22

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

358907, 369 43, 369 50, H04N 5781, G11B 2110

Patent

active

045492280

ABSTRACT:
A video disc tracking information encoding system includes a primary encoder for tracking information on a field-by-field basis and a secondary encoder for conveying a subset of the tracking information every N lines within a field. A video disc player for discs recorded with doubly conveyed complete and partial tracking information includes means for recovering the partial tracking information every N lines, comparing it with the complete tracking information recovered during the start of each field and effecting tracking error correction if the partial tracking information differs from a predetermined subset of the complete tracking information thereby facilitating intra-field track error correction so as to enable rapid correction of tracking errors.

REFERENCES:
patent: 4282551 (1981-08-01), Kanazawa et al.
patent: 4307418 (1981-12-01), Mindel et al.
patent: 4308557 (1981-12-01), Dieterich
patent: 4309721 (1982-01-01), Christopher
patent: 4313134 (1982-01-01), Rustman et al.
patent: 4375088 (1983-02-01), de Haan et al.
patent: 4426698 (1984-01-01), Pargee, Jr.
patent: 4455635 (1984-06-01), Dieterich
patent: 4488278 (1984-12-01), Dieterich

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