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ICASSP
2009
IEEE

Scalable superwideband extension for wideband coding

10 years 4 months ago
Scalable superwideband extension for wideband coding
Recent trends in speech and audio codec standardization include scalability and extending the signal bandwidth beyond wideband (WB) to superwideband (SWB). In this paper we introduce a SWB extension for the ITU-T G.718 WB codec. In the SWB extension the high frequency content is generated utilizing the quantized MDCT domain coefficients of the WB core, which enables low additional delay. The proposed implementation is scalable with 4 kbps layers. In the first layer two different coding modes are used depending on the input signal type. The proposed SWB extension is evaluated with listening tests and complexity analysis.
Mikko Tammi, Lasse Laaksonen, Anssi Rämö
Added 21 May 2010
Updated 21 May 2010
Type Conference
Year 2009
Where ICASSP
Authors Mikko Tammi, Lasse Laaksonen, Anssi Rämö, Henri Toukomaa
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