A Linear Prediction Coding On Perceptually Weighting
碩士 === 中原大學 === 電機工程研究所 === 93 === Linear prediction coefficients (LPC) analysis is a commonly used technique in speech coding. It is used to describe the short-term correlations between speech samples. Another commonly used feature for speech coding is noise-masking. A speech signal with a higher i...
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ndltd-TW-093CYCU54420442019-05-15T20:05:51Z http://ndltd.ncl.edu.tw/handle/98x355 A Linear Prediction Coding On Perceptually Weighting 基於聽覺特性之LPC編碼之研究 Wei-Yen Lin 林威延 碩士 中原大學 電機工程研究所 93 Linear prediction coefficients (LPC) analysis is a commonly used technique in speech coding. It is used to describe the short-term correlations between speech samples. Another commonly used feature for speech coding is noise-masking. A speech signal with a higher intensity will mask another one with smaller intensity. Therefore, the speech with smaller intensity is more sensitive than speech with higher intensity to noise. In this thesis, we combine the conventional LPC analysis with the noise-masking feature. In the analysis process, the difference of the estimated signal and the original signal is weighted by an A-law or μ-law like function of the original signal in the minimization of mean squared error calculations. The proposed method is used in a code excitation linear prediction (CELP) coder for simulation test. After some simulations, we find the proposed method can achieve some improvement of the speech quality. Keyword: Linear prediction, LPC, weighted LPC Jia-Yin Wang 王佳盈 2005 學位論文 ; thesis 67 zh-TW |
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碩士 === 中原大學 === 電機工程研究所 === 93 === Linear prediction coefficients (LPC) analysis is a commonly used technique in speech coding. It is used to describe the short-term correlations between speech samples. Another commonly used feature for speech coding is noise-masking. A speech signal with a higher intensity will mask another one with smaller intensity. Therefore, the speech with smaller intensity is more sensitive than speech with higher intensity to noise.
In this thesis, we combine the conventional LPC analysis with the noise-masking feature. In the analysis process, the difference of the estimated signal and the original signal is weighted by an A-law or μ-law like function of the original signal in the minimization of mean squared error calculations.
The proposed method is used in a code excitation linear prediction (CELP) coder for simulation test. After some simulations, we find the proposed method can achieve some improvement of the speech quality.
Keyword: Linear prediction, LPC, weighted LPC
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Jia-Yin Wang |
author_facet |
Jia-Yin Wang Wei-Yen Lin 林威延 |
author |
Wei-Yen Lin 林威延 |
spellingShingle |
Wei-Yen Lin 林威延 A Linear Prediction Coding On Perceptually Weighting |
author_sort |
Wei-Yen Lin |
title |
A Linear Prediction Coding On Perceptually Weighting |
title_short |
A Linear Prediction Coding On Perceptually Weighting |
title_full |
A Linear Prediction Coding On Perceptually Weighting |
title_fullStr |
A Linear Prediction Coding On Perceptually Weighting |
title_full_unstemmed |
A Linear Prediction Coding On Perceptually Weighting |
title_sort |
linear prediction coding on perceptually weighting |
publishDate |
2005 |
url |
http://ndltd.ncl.edu.tw/handle/98x355 |
work_keys_str_mv |
AT weiyenlin alinearpredictioncodingonperceptuallyweighting AT línwēiyán alinearpredictioncodingonperceptuallyweighting AT weiyenlin jīyútīngjuétèxìngzhīlpcbiānmǎzhīyánjiū AT línwēiyán jīyútīngjuétèxìngzhīlpcbiānmǎzhīyánjiū AT weiyenlin linearpredictioncodingonperceptuallyweighting AT línwēiyán linearpredictioncodingonperceptuallyweighting |
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