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An Apparatus and a Method for Decoding an Encoded Audio Signal

 
: Neuendorf, M.; Grill, B.; Kraemer, U.; Multrus, M.; Popp, H.; Rettelbach, N.; Nagel, F.; Lohwasser, M.; Gayer, M.; Jander, M.; Bacigalupo, V.

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Frontpage ()

US 20080079841 P: 20080711
WO 2010003545 A1: 2010014
EP 2352147 A2: 20110803
English
Patent, Electronic Publication
Fraunhofer IIS ()

Abstract
An apparatus for decoding (100) an encoded audio signal (102). A first decoder (110a) decodes a first portion (104a) in accordance with a first decoding algorithm for a first time portion of the encoded signal (102) to obtain a first decoded signal (114a). A second decoder (110b) decodes a second portion (104b) in accordance with a second decoding algorithm for a second time portion of the encoded signal (102) to obtain a second decoded signal (114b). A BWE module (130) has a controllable crossover frequency (fx) and is configured for performing a bandwidth extension algorithm using the first decoded signal (114a) and BWE parameters (106) for the first portion (104a), and for performing a bandwidth extension algorithm using the second decoded signal (114b) and the bandwidth extension parameters (106) for the second portion (104b). A controller (140) controls the crossover frequency (fx) for the BWE module (130) in accordance with a coding mode information (108).

: http://publica.fraunhofer.de/documents/N-201622.html