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 ADM - Adaptive Dual
 Microphone

 AEC - Acoustic
 Echo Cancelling

 AFR - Acoustic
 Feedback Reduction

 AVQ - Automatic
 Volume & eQualization
 Control

 AVQ-Me - AVQ for Music
 and Entertainment

 AWNR - Adaptive Wind
Noise Reduction

 DRC - Dynamic Range
 Compression

 EasyListen - speech
 slowing-down

 Mono to Stereo
 conversion

 MuRefiner

 NS - Noise Suppression

 PLC - Packet
 Loss Concealment

 ISM - Intelligent
 Speech Mixer

 Vocoders

 White papers

 Terminology index

You are here: Technologies -> Vocoders

Alango Technologies in cooperation with its partner Saint-Petersburg State University of Telecommunications makes the following speech encoders evailable to the customers:

• ITU-T G.722.1 - wideband speech codec 24/32 kbps
• ITU-T G.726 - ADPCM speech codec 16/24/32/40 kbps
• ITU-T G.728 (Annex G) - LD-CELP speech codec 16 kbps
• LD-CELP - proprietary speech codec 16 kbps
• EFR GSM - ACELP speech codec 12.2 kbps
• VSELP - proprietary speech codec 8 kbps
• ITU-T G.729 - CS-ACELP speech codec 8 kbps
• ITU-T G.729 (Annex A) - CS-ACELP speech codec 8 kbps (low complexity)
• ITU-T G.729 (Annex A and B) - CS-ACELP speech codec 8 kbps (VAD,DTX)
• ITU-T G.729 (Annex D) - CS-ACELP speech codec 6.4 kbps/ 8.0 kbps
• ITU-T G.729 (Annex E) - CS-ACELP speech codec 8.0 kbps/ 11.8 kbps
• ITU-T G.723.1 (Annex А) - MP-MLQ/ACELP speech codec 6.3/5.3 kbps (VAD,DTX)
• Federal Standard FS1016 - CELP vocoder 4.8 kbps
• TCELP4600 - proprietary TCELP vocoder 4.6 kbps
• Standard MELP - MELP vocoder 2.4 kbps
• LPC2400 - proprietary LPC vocoder 2.4 kbps
• LSP2400 - proprietary LPC vocoder 2.4 kbps
• MELP2200 - proprietary MELP vocoder 2.2 kbps
• MELP2000 - proprietary MELP vocoder 2.0 kbps
• MELP1800 - proprietary MELP vocoder 1.8 kbps
• MELP1200 - proprietary MELP vocoder 1.2 kbps
• LPC1200 - proprietary vocoder 1.2 kbps

For more information please visit Saint-Petersburg State University of Telecommunications site.

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