Error protection techniques for longitudinal digital recording of audio and video signals

摘要

Techniques for protection against errors arising during magnetic tape recording of digital audio and video signals are discussed. These errors mostly result from 'drop¬outs' which cause burst errors typically affecting several hundred successive bits. The error protection techniques considered include the use of (a) conventional error-detecting and correcting codes employing parity check bits (b) data re-ordering to break up burst errors into shorter groups of errors which are easier to correct (c) the examination of signal characteristics so as to detect errors without employing parity check bits. The report includes general details of error protection methods that have been designed to operate with specific experimental equipment for the recording of digital audio and video signals. Possible improvements in error protection methods for video recording are suggested.