METHOD AND SYSTEM FOR ENCODING AUDIO DATA BY ADAPTIVE LOW FREQUENCY COMPENSATION

摘要

PROBLEM TO BE SOLVED: To provide a method for determining the fraction bit assignment of the audio data value of frequency domain audio data to be encoded.SOLUTION: The assignment method includes a step of determining a masking value for an audio data value, the step including carrying out adaptive low-frequency compensation regarding audio data of respective frequency bands in a set of low-frequency bands of audio data. The adaptive low-frequency compensation includes the steps of: carrying out tonality detection regarding the audio data and generating compensation control data that indicates whether each of the frequency bands in the set of low-frequency bands has a conspicuous tonal content; and carrying out low-frequency compensation regarding the audio data within each of the frequency bands in the set of low-frequency bands having such a conspicuous tonal content as indicated by the compensation control data, but not carrying out the low-frequency compensation regarding the audio data within any other frequency band in the set of low-frequency bands.