Efficient spectrum coding for super-wideband speech and its application to 7/10/15 kHz bandwidth scalable coders

Oshikiri, M.; Ehara, Hiroyuki; Yoshida, Kōji

doi:10.1109/icassp.2004.1326027

Cited by 3 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, we noticed that also in the MDCT domain it is rather easy to find similar shapes in the low frequency content as what there are in the high frequencies, which encourages on using the quantized low frequency content for coding the high frequencies, but in a manner which maintains the waveform shape. This kind of approach is introduced for example in [7], in which MDCT domain pitch filtering is used. However, the performance of that method is not quite at the aimed level.…”

Section: Generic Modementioning

confidence: 99%

Scalable superwideband extension for wideband coding

Tammi

Laaksonen

Rämö

et al. 2009

2009 IEEE International Conference on Acoustics, Speech and Signal Processing

View full text Add to dashboard Cite

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.

show abstract

Section: Generic Modementioning

confidence: 99%