Measuring method for aurally compensated quality assessment of coded audio signals

摘要

Measuring method for aurally compensated quality assessment of coded audio signals, wherein a signal to be assessed test signal is compared with a reference signal with the aid of filters, the time spreading, level - and the frequency response adjustment, wherein the audio signal to be evaluated as a test signal (1a, b) with a reference signal (1c, d) are supplied by the original signal is compared, both signals or signal pairs (1a, b; 1c, d) according to a pre-filtering (2) by a filter bank (3) in the 20 with the desired mean frequency of the frequency range, are broken down by the characteristic of the filter bank (3) and a subsequent time spreading step (9) by means of low-pass filtering of the filter output signals an perceptually adapted representation of the form of a test signal (1a, b), the audio signals to be assessed is generated by comparison of the belonging fair representation of test signal (1a, b) and the reference signal (1c, d) according to non-linear deformations an estimate of the expected auditory impression is supplied, the filter bank (3) is adapted to hearing, and of each incoming signal by a recursive complex multiplication an undamped sine wave with the desired profile of the term arrangement frequency is generated, which leads to a test signal..