Sync displacement scrambling

Details Sync displacement scrambling Sync displacement scrambling

1982-01-08

1984-07-03

Buczinski, S. C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358119, H04N 716

Patent

active

044582684

ABSTRACT:
A subscription television system comprises means for broadcasting a scrambled television signal wherein the NTSC horizontal and vertical synchronization signals are displaced in time from their nominal positions. Each authorized system subscriber is provided with a decoder adapted for restoring the synchronization signals to their nominal positions to enable unscrambling of the broadcast programs for viewing. The synchronizing signals may be time displaced in a static manner or the time displacement may be dynamically varied as a function of time.

REFERENCES:
patent: 3460161 (1969-08-01), Waller et al.
patent: 3485941 (1969-12-01), Bass
patent: 3530232 (1970-09-01), Reiter et al.
patent: 4333107 (1982-06-01), McGuire et al.
patent: 4390898 (1983-06-01), Bond et al.

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