Error detection method and apparatus for digital communication data packets

摘要

The present disclosure discloses an audio channel field for use in transmitting digital audio in a communication system. The audio channel field includes two or more nibbles of the digital audio, wherein a first nibble contains the most significant portion of the data and each of the nibbles are arranged most significant bit to least significant bit. The audio channel field further includes a channel check field calculated from one or more bits from each of the two or more nibbles selected from the most significant bit to least significant bit but in no event more than a portion of each of the nibbles. As disclosed, the channel check field can be calculated from two bits from each of the nibbles and may represent even or odd parity. The present disclosure also includes an error detection apparatus for detecting errors in a digital audio data transmitted from a sending station to a receiving station, utilizing the disclosed audio field. The apparatus includes a comparator for comparing the value of the channel check field and the output of a second channel check field calculator and further includes means for responding to the output from the comparator indicating non-equality of said channel check field and said second output by muting the audio and/or searching for a new transmission/reception channel for said communication system.