APPARATUS AND METHOD FOR PROVIDING ERROR RECOGNITION AND CORRECTION OF RECORDED DIGITAL INFORMATION

• Main Author: STOCKHAM, THOMAS G., JR
• Format: Patent
• Language: English; French
• Published: 30.03.1982
• Edition: 3
• Subjects: ADHESIVES; BASIC ELECTRONIC CIRCUITRY; CALCULATING; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CODE CONVERSION IN GENERAL; CODING; COMPUTING; CORRECTING FLUIDS; COUNTING; DECODING; DYES; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; FILLING PASTES; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PHYSICS; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

The present invention involves apparatus and techniques for converting analog data, preferably audio signals, to digital information, which digital information is preferably recorded from two separate main channels onto main tracks and includes a third or backup track for recording thereon partial or most significant portions of that information recorded on the main tracks. The invention involves apparatus and techniques of each data group on each main track and the backup track; checking for synchronization codes arranged between data groups: and checking for a match of that appropriate portion of the main track data against the data on the backup track, with, when potentially erroneous or questionable data is detected, the invention providing for comparison of main and backup track data groupings for determining which is most likely correct or, in the case where neither data grouping is identifiable as most likely correct, the invention provides for substitution of last correct data or integration between good data. The preferred invention incorporates clocking at the signal input for data stabilization, and first-in-first-out circuitry at the output for reducing the effects of wow and flutter to produce a very high quality conversion of digital to analog form to pass to a speaker system.