| Speech Codec |
Name |
Description |
Download |
IT711 |
G.711 is an implementation of the ITU-T G.711 recommendation. The encoder compresses linear PCM, sampled at 8khz using non linear quantization to 64kbs. |
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IT722 |
G.722 is an implementation of ITU-T G.722 standard. The G.722 coder uses Sub-band Adaptive Differential Pulse Code Modulation (SB-ADPCM) to code wideband speech at 64, 56, or 48 kbps. |
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IT7221 |
G.722.1 is a low-bit-rate wideband coder, which codes speech at 24 kbps or 32 kbps. The quality at 32 kbps is the same as that of G.722 SB-ADPCM at 64 kbps. |
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IT7231 |
G.723.1A is the implementation of the ITU G.723.1 standard. It uses Multi-Pulse Maximum Likelihood Quantization (MP-MLQ) and Algebraic Code Excited Linear Prediction (ACELP) speech coding for coding at 6.3 kbps and 5.3 kbps respectively. |
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IT726 |
G.726 is an implementation of ITU-T G.726 standard for conversion linear or A-law or µ-law PCM to and from a 40, 32, 24 or 16 kbit/s channel. |
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IT728 |
ITU-T recommendation G.728 Annex G is the fixed-point version of the coding of speech at 16kbps using Low Delay Code Excited Linear Prediction (LD-CELP). |
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IT729 |
ITU-T recommendation G.729 annex A (referred as G.729A) is the reduced complexity version of G.729 recommendation and operates at 8 kbits/sec. |
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ITGSM/AMR |
GSM/AMR product is a complete implementation of the Global System for Mobile (GSM) Adaptive Multi-Rate (AMR) voice coder, and is fully compliant with the ETSI GSM 06.90 specification. |
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ITGSM/AMR/WB |
G.722.2 is an adaptive multi-rate wideband codec with bit rates ranging from 6.6 to 23.85 kbit/s. The codec is based on code excited linear predictive coding model (ACELP). The coder works on speech sampled at 16khz and a frame of 20 ms (320 speech samples). |
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