Inter-tone noise reduction in a low bit rate CELP decoder

In this paper we present a novel technique to enhance music signals encoded using a low bit rate CELP coder. The method is based on reduction of inter-tone quantization noise for decoded music signals without affecting the quality for speech signals. The proposed technique consists of two modules. T...

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Main Authors: Vaillancourt, T., Jelinek, M., Salami, R., Malenovsky, V., Lefebvre, R.
Format: Conference Proceeding
Language:English
Subjects:
Acoustic noise
Bit rate
CELP
Codecs
Decoding
Filters
Multiple signal classification
music enhancement
Noise reduction
Predictive models
Quantization
speech coding
Speech enhancement
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creator Vaillancourt, T.
Jelinek, M.
Salami, R.
Malenovsky, V.
Lefebvre, R.
description In this paper we present a novel technique to enhance music signals encoded using a low bit rate CELP coder. The method is based on reduction of inter-tone quantization noise for decoded music signals without affecting the quality for speech signals. The proposed technique consists of two modules. The first module is used to discriminate between stable tonal sounds and other sounds and the second module is used to reduce the inter-tone quantization noise in the stable tonal segments. The inter-tone noise is reduced by means of spectral subtraction. The proposed method is a part of the newly standardised ITU-T G.718 codec.
doi_str_mv 10.1109/ICASSP.2009.4960533
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source IEEE Xplore All Conference Series
subjects Acoustic noise
Bit rate
CELP
Codecs
Decoding
Filters
Multiple signal classification
music enhancement
Noise reduction
Predictive models
Quantization
speech coding
Speech enhancement
title Inter-tone noise reduction in a low bit rate CELP decoder
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