Improved embedded wideband speech codec fitting EV-VBR standard
Based on the International Telecommunication Union Telecommunication Standardization Sector（ITU-T） recommendation for EV-VBR coding standard and the candidate codec designed by Speech and Audio Signal Processing Laboratory（SASPL） of Beijing University of Technology,an improved embedded variable bit...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2010-01-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/74648311/ |
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| _version_ | 1841537733492736000 |
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| author | XIN Jie BAO Chang-chun JIA Mao-shen LIU Xin |
| author_facet | XIN Jie BAO Chang-chun JIA Mao-shen LIU Xin |
| author_sort | XIN Jie |
| collection | DOAJ |
| description | Based on the International Telecommunication Union Telecommunication Standardization Sector（ITU-T） recommendation for EV-VBR coding standard and the candidate codec designed by Speech and Audio Signal Processing Laboratory（SASPL） of Beijing University of Technology,an improved embedded variable bit rates wideband speech codec was proposed.In the improved codec,ACELP coding was implied to the first two coding layers.The middle sub-frame spectral parameters were computed and quantized.Three pulses depth first tree search algorithm was designed.On the higher three coding layers embedded TCX coding was reconstructed by accumulating frequency coefficients vectors.Addition-ally,VAD and DTX functions were implemented in the improved codec.Test results show that the improved codec achieves better speech quality and much lower coding complexity than the original codec.The speech quality and coding efficiency are comparable with G.718 of a new ITU-T speech coding standard and the low delay feature is retained. |
| format | Article |
| id | doaj-art-77c48b841809450a85b23e0e8907c9f7 |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2010-01-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-77c48b841809450a85b23e0e8907c9f72025-01-14T08:25:22ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2010-01-013171374648311Improved embedded wideband speech codec fitting EV-VBR standardXIN JieBAO Chang-chunJIA Mao-shenLIU XinBased on the International Telecommunication Union Telecommunication Standardization Sector（ITU-T） recommendation for EV-VBR coding standard and the candidate codec designed by Speech and Audio Signal Processing Laboratory（SASPL） of Beijing University of Technology,an improved embedded variable bit rates wideband speech codec was proposed.In the improved codec,ACELP coding was implied to the first two coding layers.The middle sub-frame spectral parameters were computed and quantized.Three pulses depth first tree search algorithm was designed.On the higher three coding layers embedded TCX coding was reconstructed by accumulating frequency coefficients vectors.Addition-ally,VAD and DTX functions were implemented in the improved codec.Test results show that the improved codec achieves better speech quality and much lower coding complexity than the original codec.The speech quality and coding efficiency are comparable with G.718 of a new ITU-T speech coding standard and the low delay feature is retained.http://www.joconline.com.cn/zh/article/74648311/speech codingembedded codingembedded ACELP codingembedded TCX coding |
| spellingShingle | XIN Jie BAO Chang-chun JIA Mao-shen LIU Xin Improved embedded wideband speech codec fitting EV-VBR standard Tongxin xuebao speech coding embedded coding embedded ACELP coding embedded TCX coding |
| title | Improved embedded wideband speech codec fitting EV-VBR standard |
| title_full | Improved embedded wideband speech codec fitting EV-VBR standard |
| title_fullStr | Improved embedded wideband speech codec fitting EV-VBR standard |
| title_full_unstemmed | Improved embedded wideband speech codec fitting EV-VBR standard |
| title_short | Improved embedded wideband speech codec fitting EV-VBR standard |
| title_sort | improved embedded wideband speech codec fitting ev vbr standard |
| topic | speech coding embedded coding embedded ACELP coding embedded TCX coding |
| url | http://www.joconline.com.cn/zh/article/74648311/ |
| work_keys_str_mv | AT xinjie improvedembeddedwidebandspeechcodecfittingevvbrstandard AT baochangchun improvedembeddedwidebandspeechcodecfittingevvbrstandard AT jiamaoshen improvedembeddedwidebandspeechcodecfittingevvbrstandard AT liuxin improvedembeddedwidebandspeechcodecfittingevvbrstandard |