Television – Image signal processing circuitry specific to television
Patent
1992-12-28
1994-06-28
Groody, James J.
Television
Image signal processing circuitry specific to television
364717, 380 46, H04N 514
Patent
active
053252012
ABSTRACT:
An assembly of serially coupled XOR gates and an assembly of serially coupled shift register-XOR gate pairs are provided to a digital video system. The two assemblies are serially coupled to each other. The assembly of XOR gates generates a shift-in bit for the assembly of shift register-XOR gate pairs based on a cooperatively selected bit of a video control counter and a number of cooperatively selected feedback bits from the XOR gates of the assembly of shift register-XOR gate pairs it received as inputs. The assembly of shift register-XOR gate pairs in turn generates a pseudo-random number based on the shift-in bit and additional cooperatively selected bits of the video control counter. The XOR gate outputs of the assembly of shift register-XOR gate pairs are cooperatively mapped to the various bits of generated pseudo-random number. The pseudo-random number sequence is repeated when the video control counter is reinitialized to a predetermined value and the shift registers are cleared to a predefined state. The sequence length is sufficiently long to outlast a run of the video control counter before it is reinitialized for a new instance of the specified area controlled by the video control counter.
REFERENCES:
patent: 3811038 (1974-05-01), Reddaway
patent: 3958077 (1976-05-01), Ross et al.
patent: 4161041 (1979-07-01), Butler
patent: 4318126 (1982-05-01), Sassler
patent: 4408298 (1983-10-01), Ruhland
patent: 4438501 (1984-03-01), Weber
patent: 4568966 (1986-02-01), Lippel
patent: 4667301 (1987-05-01), Chiu
patent: 4791594 (1988-12-01), Harney
patent: 4888640 (1989-12-01), Acampora
patent: 4896213 (1990-01-01), Kobo
patent: 4928310 (1990-05-01), Goutzoulis
patent: 4959717 (1990-09-01), Faroudja
patent: 4965668 (1990-10-01), Abt
patent: 5136371 (1992-08-01), Savatier et al.
patent: 5235423 (1993-08-01), Dunbar et al.
Blatt Jeffrey J.
Grant Chris
Groody James J.
Sony Electronics Inc.
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