SOFT DECISION AUDIO DECODING SYSTEM

摘要

A soft decision audio decoding system for preserving audio continuity in a digital wireless audio receiver is provided that deduces the likelihood of errors in a received digital signal, based on generated hard bits and soft bits. The soft bits may be utilized by a soft audio decoder to determine whether the digital signal should be decoded or muted. The soft bits may be generated based on the detected point and a detected noise power, or by using a soft-output Viterbi algorithm. The value of the soft bits may indicate confidence in the strength of the hard bit generation. The soft decision audio decoding system may infer errors and decode perceptually acceptable audio without requiring error detection, as in conventional systems, as well as have low latency and improved granularity.

主权项

1. A method of receiving an audio signal represented by a digital signal, comprising:
detecting a point of a constellation associated with a digital modulation scheme in the digital signal from a received RF signal; detecting a noise power of the digital signal; generating hard bits based on the detected point of the constellation; generating soft bits based on the detected point of the constellation and the detected noise power; determining whether to decode the digital signal into a digital audio signal, based on the soft bits; generating the digital audio signal based on the digital signal, if it is determined to decode the digital signal into the digital audio signal; and muting the digital audio signal, if it is determine not to decode the digital signal into the digital audio signal.