VOCODER

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相关领域：电子电信更多>>
相关作者：叶芸郭太良姚剑敏郑荣辉更多>>
相关机构：福州大学更多>>
相关期刊：《通信学报》《High Technology Letters》《The Journal of China Universities of Posts and Telecommunications》《电声技术》更多>>
相关基金：国家自然科学基金更多>>
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一种基于频谱细化分析的虚拟低音VB Phase Vocoder算法改进
《电声技术》2013年第8期70-72,76,共4页郑荣辉 姚剑敏 叶芸 郭太良 
介绍了产生虚拟低音的VB Phase Vocoder算法,阐述了其频谱确定方法在处理密集频谱时的不足。针对此情况引入了基于复解析带通滤波器的复调制细化频谱分析,通过对低频段的细化处理,提高了频谱确定单元的处理精度。实验证明该做法能有效...
关键词：虚拟低音 VB PHASE Vocoder算法 密集频谱 
Enhancement of Voice Quality and Bit-rate Reduction by Prosodic Control in G.723.1 Vocoder
《Journal of Measurement Science and Instrumentation》2011年第2期179-183,共5页Jong-kuk KIM 
supported by the Brain Korea 21 Project in 2010,and the MKE(The Ministry of Knowledge Economy,Korea);the ITRC(Information Technology Research Center)support program(NIPA-2010-(C1090-1021-0010))
Speech coding techniques have been studied not truly to reduce the complexity and bit rate but also to improve the sound quality. CELP type vocoder, used as standard, supports the great stead quality even low bit rate...
关键词：CELPocoder bit rate PSOLA technique prosodic 
Realtime robust speech communication based on iterative joint source-channel decoding and demodulation algorithm for MELP vocoder
《High Technology Letters》2010年第2期111-116,共6页彭坦 Cui Huijuan Tang Kun 
Supported by the National Natural Science Foundation of China （No. 60572081 ）
Realtime speech communications require high efficient compression algorithms to encode speech signals. As the compressed speech parameters are highly sensitive to transmission errors, robust source and channel decodin...
关键词：speech coding joint souree-channel coding and modulation （JSCCM） iterative decoding 
DCT_M model for excitation parameter in low bit rate vocoder
《Frontiers of Electrical and Electronic Engineering in China》2008年第2期204-207,共4页Xiaoyan DANG Kun TANG 
supported by the National Natural Science Foundation of China (Grant No.60272020).
The description precision of an excitation signal greatly influences the quality of reconstructed speech in low bit rate vocoders.To improve the reconstruction quality,the DCT_M model is proposed to express the excita...
关键词：VOCODER DCT_M model model error 
AN IMPROVED 2.4kb/s MIXED EXCITATION LINEAR PREDICTION VOCODER
《Journal of Electronics(China)》2005年第4期431-436,共6页MaXin LiWenyuan LiuChangshu ZhangYuzhong 
This letter presents two improvements on 2.4 kb/s Mixed-Excitation Linear Prediction (MELP) vocoder. The one is a new parameter Redzc named energy to differential zerocrossing rate which is used in adaptation of V/UV ...
关键词：Mixed-Excitation Linear Prediction (MELP) VOCODER Multi-Stage Vector Search (MSVQ) V/UV decision 
Software Simulation in GSM Environment and Hardware Implementation of Improved Multi-band Excitation Vocoder
《通信学报》1998年第5期18-27,共10页KuangJingming LiFeng 等 
ＳｏｆｔｗａｒｅＳｉｍｕｌａｔｉｏｎｉｎＧＳＭＥｎｖｉｒｏｎｍｅｎｔａｎｄＨａｒｄｗａｒｅＩｍｐｌｅｍｅｎｔａｔｉｏｎｏｆＩｍｐｒｏｖｅｄＭｕｌｔｉｂａｎｄＥｘｃｉｔａｔｉｏｎＶｏｃｏｄｅｒＫｕａｎｇＪｉｎｇｍｉｎ...
关键词：软件仿真 多带合成声码器 GSM 语音 
A SINGLE PROCESSOR MULTI-RATE VOCODER
《Journal of Electronics(China)》1997年第1期59-62,共4页Wang Dusheng Zhang Jiankang Fan Changxin(information Science Institute, Xidian university, Xi’an 710071) 
This paper presents the design of a full-duplex multi-rate vocoder which implements an LPC-10, CELPC and VSELPC algorithms in real time. A single commercially available digital signal processor IC, the TMS320C25, is u...
关键词：MULTI-RATE VOCODER SPEECH CODING Digital SIGNAL PROCESSOR 
Improved Populating Code-Excited Linear Predictive Coder
《The Journal of China Universities of Posts and Telecommunications》1994年第1期45-51,共7页Bao Changchun Zhao Guoqian (Department of Telecommunication Engineering, Changchun Post and Telecommunication institute, Changchun 130012, P. R. China) Dai Yisong (Department of Electronic Engineering,Jilin University of Technology, Changchun 130012, P. 
Although CELP coding has provided good quality synthetic speech at medium and low bit rates,the computation of an exhaustive search for stochastic codebook is extremely complex. This paper studies the exhaustive searc...
关键词：Speech processing VOCODER Linear prediction 
A New Adaptive Formant Vocoder
《Journal of Systems Engineering and Electronics》1991年第1期89-96,共8页Hu Yi and He DehuanBeijing Institute of Remote Sensing Equipment, P. O. Box 3925, Beijing 100854, China 
A new type of vocoder system based upon formant analysis is presented in this paper. The LMS adaptive algorithm is used for tracking formants of speech signals. The results of computer simulation show that the new voc...
关键词：Adaptive formant vocoder Formant analysis LMS adaptive algorithm. 
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