Code signal generator or detector for video frame code

Details Code signal generator or detector for video frame code Code signal generator or detector for video frame code

1983-12-08

1986-05-06

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

371 2, 371 47, 307445, 34082557, 358142, H04Q 900, H03K 518, H04N 700, G06F 1100

Patent

active

045875219

ABSTRACT:
A code signal detector for detecting a code signal included in signals of a broadcast with characters superimposed in which character signals are superimposed during the vertical blanking line period, said code signal detector comprising one or more shift registers for converting serial data into parallel data, priority encoder elements for detecting the most significant or the least significant bit represented by positive or negative logic level out of parallel data supplied from said shift register, and exclusive-OR gates.

REFERENCES:
patent: 3891792 (1975-06-01), Kimura
patent: 4032885 (1977-06-01), Roth
patent: 4230990 (1980-10-01), Lert, Jr. et al.
patent: 4418364 (1983-11-01), Wine
patent: 4442521 (1984-04-01), Inaba et al.
patent: 4517600 (1985-05-01), Reitmeier
patent: 4524445 (1985-06-01), Fujii
patent: 4533948 (1985-08-01), McNamara et al.
"A Proposal of a New Scheme (Packet Scheme) for the Character Broadcast", 4-1-1-WG-9, Japan Broadcasting Corporation, 2 pages, no date.

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