PROCESS FOR FINDING THE OVERALL MONITORING THRESHOLD DURING A BIT-RATING SOURCE CODING

摘要

In order to determine the total masking limit value 6 during source coding that reduces the bit rate of the digital audio signal 1, the requantization and coding adjustments to the time or spectral scanning value 2 of the audio signal are carried out with all relevant maskers and From the masking results of the noise maskers 100, 200 and 300 and from the normal audio threshold 400.;The masking edges 101, 102, 201, 202, 301, 302 of the masker selected for this purpose are divided, and the low order polynomials are determined close to the individual segments, and the low order polynomial mutual coefficients are determined. The strength of the masker converted to the logarithmic level is used to determine the mutual coefficients of low order polynomials. The total masking limit 6 is determined step by step from the polynomial representing the masking edge of the masker selected as needed, individually or in accordance with the selected reference point, in units of maskers.