Method of correcting data carried on video format signal

Details Method of correcting data carried on video format signal Method of correcting data carried on video format signal

1985-03-27

1987-06-02

Smith, Jerry

Excavating

371 39, 371 50, 360 381, G06F 1110

Patent

active

046708812

ABSTRACT:
A method of correcting errors in the information and control data of a video format signal containing redundant parity check bits, wherein the information data bits and associated parity check bits are assigned to the addresses located in an information data block and the control data bits and the associated parity check bits are assigned to the addresses located in a control data block, the two data blocks being carried on the video format signal. Prior to reproduction of the video format signal, the data blocks are extracted from the signal and are loaded into a memory whereupon the information data bits and then the control data bits are corrected by the respectively associated parity check bits. The control data block is divided into first and second subblocks, and the data bits are corrected by storing the first control data subblock and thereafter the information data block at selected addresses of the memory, executing the correction of the information data bits with use of the associated parity check bits, then loading the second control data subblock into the memory and storing it at selected ones of the addresses occupied by the parity check bits for the information data bits, and thereafter executing the correction of control data bits with use of the parity check bits contained in the two control data subblocks.

REFERENCES:
patent: 4204634 (1980-05-01), Barsuhn
patent: 4371963 (1983-02-01), Edwards
patent: 4433416 (1984-02-01), Kojima
patent: 4495623 (1985-01-01), George
patent: 4564945 (1986-01-01), Glover
patent: 4586183 (1986-04-01), Wilkinson

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