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Description: G.729 is an ITU-T ADPCM speech codec standard covering the transmission of voice at rates of 16, 24, 32, and 40 kbit/s. It was introduced to supersede both G.721, which covered ADPCM at 32 kbit/s, and G.723, which described ADPCM for 24 and 40 kbit/s. G.726 also introduced a new 16 kbit/s rate. The four bit rates associated with G.726 are often referred to by the bit size of a sample, which are 2-bits, 3-bits, 4-bits, and 5-bits respectively.
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Size: 977088 |
Author: chu |
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Description: 基于DSP的语音编解码技术的研究
CS-ACELP算法 基于DSP的G729语音编码 解码实现方案-DSP-based voice codec technology CS-ACELP algorithm is based on the DSP-G729 voice codec program realize
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Size: 488448 |
Author: 欧阳 |
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Description: ITU-T在1996年3月公布了G.729建议的8Kbit/s共轭结构代数码激励线性预测（CS-ACELP）语音编码方案，其编解码程序C语言的源代码。-ITU-T in March 1996 announced a G.729 recommendations 8Kbit/s conjugate structure on behalf of a digital excitation linear prediction (CS-ACELP) voice coding schemes, the codec program C language source code.
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Size: 161792 |
Author: 小婷子 |
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Description: G.729 is an ITU-T ADPCM speech codec standard covering the transmission of voice at rates of 16, 24, 32, and 40 kbit/s. It was introduced to supersede both G.721, which covered ADPCM at 32 kbit/s, and G.723, which described ADPCM for 24 and 40 kbit/s. G.726 also introduced a new 16 kbit/s rate. The four bit rates associated with G.726 are often referred to by the bit size of a sample, which are 2-bits, 3-bits, 4-bits, and 5-bits respectively.
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Size: 976896 |
Author: chu |
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Description: 本程序的压缩编码是G.729的编解码程序，其的算法是基于CS-ACELP的算法基础上的编码-The process of compression encoding is G.729 codec process, its algorithm is based on the CS-ACELP coding algorithm based on
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Size: 9752576 |
Author: 张同学 |
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Description: Implementation of a speech codec based on coding of speech at 8 kbit/s
using conjugate-structure algebraic-code-excited linear-prediction (CS-ACELP)
- We took .wav files that is sampled at 8000 Hz using 16-bit linear PCM. The encoding process is done every 10ms frame or 80 samples. For the preprocessing stage, the samples are high passed with cut-off frequency of 140 Hz and scaled down by 2. A total of 240 samples are buffer for windowing and autocorrelation computation. The autocorrelation coefficients are used to calculate the LP filter coefficients using the Levinson-Durbin algorithm. The LP filter coefficients are converted to Line Spectral Pair (LSP) coefficients. LSP coefficients are converted back to the LP filter coefficients, which is just the reverse process of the conversion from LP to LSP. This module is exactly what the decoder will need in order to convert the LSP coefficients to LP coefficients. We decided not to implement the LSF quantization module because we did not have the codebook information when we designed our system.
The open-loop pitch delay is calculated first for each frame. Then the closed-loop pitch
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Size: 40960 |
Author: coco |
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Description: ITU-T G.729 Source codeITU-T G.729 Annex B ANSI-C Source CodeVersion 1.4 Last modified: November, 2000 */TITLE-----Fixed-point description of Recommendation G.729 with ANNEX BCoding of Speech at 8 kbit/s using Conjugate-StructureAlgebraic-Code-Excited Linear-Prediction (CS-ACELP) withVoice Activity Decision(VAD), Discontinuous Transmission(DTX), and Comfort Noise Generation(CNG).SOFTWARE AND INTELLECTUAL PROPERTY----------------------------------This software package is provided as part of ITU-T Recommendation G.729B.Copyright (c) 1996, AT&T, France Telecom, Lucent Technologies, NTT, Rockwell International, Universite de Sherbrooke.All rights reserved.The copy of the source C code, version 1.4, is given under Copyright of the authors, only for the purpose of establishing the specification of a codec.VERSION-------This is version 1.4.-ITU-T G.729 Source codeITU-T G.729 Annex B ANSI-C Source CodeVersion 1.4 Last modified: November, 2000*/TITLE-----Fixed-point description of Recommendation G.729 with ANNEX BCoding of Speech at 8 kbit/s using Conjugate-StructureAlgebraic-Code-Excited Linear-Prediction (CS-ACELP) withVoice Activity Decision(VAD), Discontinuous Transmission(DTX), and Comfort Noise Generation(CNG).SOFTWARE AND INTELLECTUAL PROPERTY----------------------------------This software package is provided as part of ITU-T Recommendation G.729B.Copyright (c) 1996, AT&T, France Telecom, Lucent Technologies, NTT, Rockwell International, Universite de Sherbrooke.All rights reserved.The copy of the source C code, version 1.4, is given under Copyright of the authors, only for the purpose of establishing the specification of a codec.VERSION-------This is version 1.4.
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Size: 115712 |
Author: 丁一 |
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Description: G.729标准--CS-ACELP编解码算法-G.729 standard- CS-ACELP codec
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Size: 94208 |
Author: Wang |
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