Material Copyright © 2023 ESPICO Ltd
Specialists in Speech and Audio Software Development
ITU G.728
ITU-T recommendation G.728 Annex G is the fixed-point version of the recommendation G.728: coding of speech at 16kbps using Low Delay Code Excited Linear Prediction (LD-CELP). It uses backward adaption of predictors and gain to achieve an algorithmic delay of 0.625 ms. Under error-free transmission conditions, the perceived quality of a 16kbit/s LD-CELP codec is equivalent to that of a codec conforming to 32 kbit/s ADPCM.
The ESPICO implementations are highly optimised, realising low memory and MHz requirements. Contact ESPICO for specific resource requirements.
Features
- Bit-exact with ITU-T G.728, G.728 Annex G recommendation
- Multi-channel
- Re-entrant
Availability
ESPICO’s optimised solution can be ported to any platform. Supported platforms include:
- ZSP Cores including ZSP400, ZSP500, ZSP800 families
- ARM including Cortex and NeonTM
- MIPS32 74KTM
- Ceva DSP Cores
Applications
- VoIP
- Speech storage
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| ETSI NB-AMR |
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| ETSI EFR |
| ETSI FR |