APPARATUS ANDMETHOD FOR GENERATING AUDIO SUBBAND VALUES AND APPARATUS AND METHOD FOR GENERATING TIME-DOMAIN AUDIO SAMPLES

摘要

APPARATUS AND METHOD FOR GENERATING AUDIO SUBBAND VALUES AND APPARATUS AND METHOD FOR GENERATING TIME-DOMAIN AUDIO 5 SAMPLES AN EMBODIMENT OF AN APPARATUS (100) FOR GENERATING AUDIO SUBBAND VALUES IN AUDIO SUBBAND CHANNELS COMPRISES AN ANALYSIS WINDOWER (110) FOR WINDOWING A FRAME (120) OF 10 TIME-DOMAIN AUDIO INPUT SAMPLES BEING IN A TIME SEQUENCE EXTENDING FROM AN EARLY SAMPLE TO A LATER SAMPLE USING AN ANALYSIS WINDOW FUNCTION (190) COMPRISING A SEQUENCE OF WINDOW COEFFICIENTS TO OBTAIN WINDOWED SAMPLES. THE ANALYSIS WINDOW FUNCTION (190) COMPRISES A FIRST GROUP 15 (200) OF WINDOW COEFFICIENTS AND A SECOND GROUP (210) OF WINDOW COEFFICIENTS. THE FIRST GROUP (200) OF WINDOW COEFFICIENTS IS USED FOR WINDOWING LATER TIME-DOMAIN SAMPLES AND THE SECOND GROUP (210) OF WINDOW COEFFICIENTS IS USED FOR WINDOWING AN EARLIER TIME-DOMAIN SAMPLES. THE 20 APPARATUS (100) FURTHER COMPRISES A CALCULATOR (170) FOR CALCULATING THE AUDIO SUBBAND VALUES USING THE WINDOWED SAMPLES. 25