Waveform interpolation speech coding algorithm at 2.4kbit/s based on wavelet transform
A waveform interpolation speech coding algorithm at 2.4kbit/s based on wavelet transform was proposed,in which characteristic waveform decomposition and reconstruction is processed using biorthogonal wavelet filters.At the encoder,the alignment operation was removed and the amplitude spectrum is dec...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2007-01-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/74658881/ |
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| _version_ | 1841537445424791552 |
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| author | WANG Jing KUANG Jing-ming XIE Xiang |
| author_facet | WANG Jing KUANG Jing-ming XIE Xiang |
| author_sort | WANG Jing |
| collection | DOAJ |
| description | A waveform interpolation speech coding algorithm at 2.4kbit/s based on wavelet transform was proposed,in which characteristic waveform decomposition and reconstruction is processed using biorthogonal wavelet filters.At the encoder,the alignment operation was removed and the amplitude spectrum is decomposed without phase spectrum.Because of the wavelet compression,only the amplitude spectrum of last layer is transmitted.At the decoder,different scale space is reconstructed separately and random or fixed phase was combined to the spectrum based on voice degree at the last.Additionally,based on the time-variable feature of speech,voiced degree flag of each subframe was introduced to indicate the spectrum selection and quantization.Subjective R-A/B listening tests indicated that the synthesis speech quality of the 2.4kbit/s WT-CWI coding algorithm is better than that of standard 2.4kbit/s MELP coder and FS1016 4.8kbit/s CELP coder and is better than traditional 3.8kbit/s CWI coder. |
| format | Article |
| id | doaj-art-4bb0b8512aed404eb463c4df824c7b87 |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2007-01-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-4bb0b8512aed404eb463c4df824c7b872025-01-14T08:36:00ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2007-01-01434874658881Waveform interpolation speech coding algorithm at 2.4kbit/s based on wavelet transformWANG JingKUANG Jing-mingXIE XiangA waveform interpolation speech coding algorithm at 2.4kbit/s based on wavelet transform was proposed,in which characteristic waveform decomposition and reconstruction is processed using biorthogonal wavelet filters.At the encoder,the alignment operation was removed and the amplitude spectrum is decomposed without phase spectrum.Because of the wavelet compression,only the amplitude spectrum of last layer is transmitted.At the decoder,different scale space is reconstructed separately and random or fixed phase was combined to the spectrum based on voice degree at the last.Additionally,based on the time-variable feature of speech,voiced degree flag of each subframe was introduced to indicate the spectrum selection and quantization.Subjective R-A/B listening tests indicated that the synthesis speech quality of the 2.4kbit/s WT-CWI coding algorithm is better than that of standard 2.4kbit/s MELP coder and FS1016 4.8kbit/s CELP coder and is better than traditional 3.8kbit/s CWI coder.http://www.joconline.com.cn/zh/article/74658881/speech codingwavelet transformwaveform interpolationcharacteristic waveform decomposition |
| spellingShingle | WANG Jing KUANG Jing-ming XIE Xiang Waveform interpolation speech coding algorithm at 2.4kbit/s based on wavelet transform Tongxin xuebao speech coding wavelet transform waveform interpolation characteristic waveform decomposition |
| title | Waveform interpolation speech coding algorithm at 2.4kbit/s based on wavelet transform |
| title_full | Waveform interpolation speech coding algorithm at 2.4kbit/s based on wavelet transform |
| title_fullStr | Waveform interpolation speech coding algorithm at 2.4kbit/s based on wavelet transform |
| title_full_unstemmed | Waveform interpolation speech coding algorithm at 2.4kbit/s based on wavelet transform |
| title_short | Waveform interpolation speech coding algorithm at 2.4kbit/s based on wavelet transform |
| title_sort | waveform interpolation speech coding algorithm at 2 4kbit s based on wavelet transform |
| topic | speech coding wavelet transform waveform interpolation characteristic waveform decomposition |
| url | http://www.joconline.com.cn/zh/article/74658881/ |
| work_keys_str_mv | AT wangjing waveforminterpolationspeechcodingalgorithmat24kbitsbasedonwavelettransform AT kuangjingming waveforminterpolationspeechcodingalgorithmat24kbitsbasedonwavelettransform AT xiexiang waveforminterpolationspeechcodingalgorithmat24kbitsbasedonwavelettransform |