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[Multimedia Develop] celp_3.2a DL : 0: CELP Voice Coder Version 3.2c The U.S. Government shall not be held liable for any damages resulting from this code. Further reproduction or distribution of this code without prior written permission of the U.S Government is prohibited. CELP（码本激励预测编码算法）-CELP Voice Coder Version 3.2 C The U. S. Gove rnment shall not be held liable for any damages r esulting from this code. Further reproduction or distribution of this code without prior writ ten permission of the government is notified prohibi ted. CELP (code-excited predictive coding algorithm)
Date : 2025-12-18 Size : 1.87mb User : 周周
[Multimedia Develop] G728(LD-CELP) DL : 0: G.728 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.
Date : 2025-12-18 Size : 49kb User : chu
[Multimedia Develop] MC054 DL : 0: 4.8 Kbps CELP Coder 􀂄 Each frame is divided into 4 subframes. In each subframe, the codebook contains 512 codevectors. 􀂄 The gain is quantized using 5 bits per subframe. 􀂄 The LSP parameters are quantized using 34 bits similar to the LPC Vocoder
Date : 2025-12-18 Size : 194kb User : 黄豈荣
[Multimedia Develop] gsm-1.0.13.tar DL : 1: The low level speech compression algorithm of the GSM suite is called GSM 06.10 RPE LTP (Regular Pulse Excitation Long Term Predictor). My colleague Dr. Carsten Bormann and I have implemented a GSM 06.10 RPE LTP coder and decoder in C. Its source code is freely available, and we encourage you to use it, play with it, and invent new real time media protocols and algorithms. Our implementation consists of a C library and a stand alone program. Both are destined to be compiled and used on a Unix like environment with at least 32 bit integers, but others have ported it to VMS and a MS DOS 16 bit environment. GSM 06.10 is faster than code book lookup algorithms such as CELP, but by no means cheap to use it for real time communication, you will need at least a medium scale workstation. -The low level speech compression algorithm of the GSM suite is called GSM 06.10 RPE LTP (Regular Pulse Excitation Long Term Predictor). My colleague Dr. Carsten Bormann and I have implemented a GSM 06.10 RPE LTP coder and decoder in C. Its source code is freely available, and we encourage you to use it, play with it, and invent new real time media protocols and algorithms. Our implementation consists of a C library and a stand alone program. Both are destined to be compiled and used on a Unix like environment with at least 32 bit integers, but others have ported it to VMS and a MS DOS 16 bit environment. GSM 06.10 is faster than code book lookup algorithms such as CELP, but by no means cheap to use it for real time communication, you will need at least a medium scale workstation.
Date : 2025-12-18 Size : 64kb User : rdjusr