Patent ID: 8527264
Filing Date: 2013-09-03
Classification: G10L

Abstract:
1. An audio encoding method, including the steps of: (a) performing tonality detection on frequency domain audio data to generate compensation control data indicative of whether each low frequency band of a set of at least some low frequency bands of the audio data has prominent tonal content; (b) for said each low frequency band, generating a preliminary masking value for the audio data in the band; and (c) for said each low frequency band, determining a masking value for the audio data in the band, wherein the masking value for the audio data in each said low frequency band having prominent tonal content as indicated by the compensation control data is obtained by performing low frequency compensation to correct the preliminary masking value for the audio data in the band, and the masking value for the audio data in each other low frequency band in the set is the preliminary masking value for the audio data in the band, wherein the frequency domain audio data comprises an exponent value for said each low frequency band of the set, and step (a) includes a step of determining, for said each low frequency band of the set, a measure of difference between exponents and corresponding tented exponents of the audio data.