Importance

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Abstract

In this invention digital audio data transmitted by wireless means is error corrected and concealed to remove and hide noise created errors ranging from random to burst noise. The data is interleaved into even and odd sub-frames to combat burst mode noise, and ECC is created for the MSB of the data and for command and control bytes using a Reed Solomon encoder before transmission. The LSB are not encoded for reasons of bandwidth because experiments have show the LSB have little effect on audible noise even at a bit error rate of 3.0E-3. The transmitted data is decoded using Reed Solomon decoder and error corrected. The digital audio data is then processed through a concealment procedure that hides the remaining MSB errors by using extrapolation, soft muting and muting depending on the state of audio data preceding and following the current sub-frame of the digital audio data. Soft muting is a form of windowing using Hanning or other windowing algorithms where the coefficients of the window algorithm diminish to a minimum at the boundaries of the data frames.

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First Claim