Predictive VQ for Bandwidth Scalable LSP Quantization

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

doi:10.1109/icassp.2005.1415069

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…These WB-LSF parameters are quantized using 24 bits by a bandwidth-scalable scheme [4,5]. The WB-LSF quantization method is similar to [5]. However, the decoded NB-LSF parameters from the 8 kbit/s core coder are directly extended and used to predict WB-LSF parameters.…”

Section: Bandwidth Extension Based On Wb-lpc (14 Kbit/s Layer)mentioning

confidence: 99%

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A 8–32 KBIT/S Scalable Wideband Speech and Audio Coding Candidate for ITU-T G729EV Standardization

Ragot

Kovesi

Virette

et al.

2006 IEEE International Conference on Acoustics Speed and Signal Processing Proceedings

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This paper describes a 8-32 kbit/s scalable speech and audio coder submitted as a candidate for the ITU-T G729-based Embedded Variable bitrate (G729EV) standardization. The coder is built upon a 3-stage coding structure consisting of: narrowband cascade CELP coding at 8 and 12 kbit/s, bandwidth extension based on wideband linear-predictive coding (WB-LPC) at 14 kbit/s, and MDCT coding in a WB-LPC weighted signal domain from 14 to 32 kbit/s. ITU-T test results showed that this coder passed all the requirements of the G729EV qualification phase.

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Section: Bandwidth Extension Based On Wb-lpc (14 Kbit/s Layer)mentioning

confidence: 99%

“…A wideband LPC (WB-LPC) analysis of order 18 is performed, and the resulting coefficients are converted to line spectrum frequencies (LSF). These WB-LSF parameters are quantized using 24 bits by a bandwidth-scalable scheme [4,5]. The WB-LSF quantization method is similar to [5].…”

Section: Bandwidth Extension Based On Wb-lpc (14 Kbit/s Layer)mentioning

confidence: 99%