A method of identifying a stereo audio signal that has been encoded joint evaluation methods and the preservation of stereo audio signal

摘要

(57) save SUMMARY stereo audio signal characteristics, the method comprising: creating a test signal X ''by processing stereo signals by using the stereo signal as the reference signal X, such as by decoding continue such encoding it is evaluated by. (X, X '') between the signals is converted into the frequency domain in order to create a spectral representation data subbands respectively (i). Signal amount; ''is, on the basis of spectral data (L, R) of the channel of the test signal or the reference signal test signals (X (X) and the reference signal (Gi Gi)'' each of the subbands of both) (i) It is determined for. It is possible from comparison of; (Gi ''Gi), in connection with the preservation of the stereo audio signal characteristics for coding technique or process used to draw conclusions signal quantity belonging to the same subband (i).