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Apparatus and Method for Generating Audio Subband Values and Apparatus and Method for Generating Time-Domain Audio Samples

 
: Schnell, M.; Lutzki, M.; Lohwasser, M.; Schmidt, M.; Gayer, M.; Mellar, M.; Edler, B.; Multrus, M.; Schuller, G.; Geiger, R.; Grill, B.

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Frontpage ()

US 20060862954 P: 20061025
AR 104728 A1: 20071025
AR 104739 A1: 20071025
WO 2008049589 A1: 20080502
AR 063394 A1: 20090128
AR 063400 A1: 20090128
English
Patent, Electronic Publication
Fraunhofer IIS ()

Abstract
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 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 (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 apparatus (100) further comprises a calculator (170) for calculating the audio subband values using the windowed samples.

: http://publica.fraunhofer.de/documents/N-201611.html