internet Speech Audio Codec
iSAC: A wideband and super wideband audio codec for VoIP and streaming audio.
- Bitrates from 10 to 32 kbps in wideband
- Bitrates from 10 to 56 kbps in super-wideband
- Supports 16 kHz and 32 kHz input/output sampling rates
- Frame size of 30 or 60 ms
The iSAC codec compresses speech frames of 16 kHz, 16-bit sampled input speech, each frame containing 30 or 60 ms of speech.
|Arm Devices Armv8A Cortex-A53 | Armv9-A|
ADT iSAC is currently available on the above Platform: Other configurations are available upon request.
NOTE: We specify MIPS (Millions of Instructions Per Second) as MCPS (Millions of Instruction Cycles Per Second). Unless otherwise specified, peak MIPS are indicated.
↓ Click on links below to view specification tables.
Sampling rate: 16000
Frame Len: 960 (60ms/frame)
Bit rate: 32000
iSAC ARM Cortex-A53CPU Utilization
internet Speech Audio Codec (iSAC) is a wideband speech codec, developed by Global IP Solutions. It is suitable for VoIP applications and streaming audio. The encoded blocks have to be encapsulated in a suitable protocol for transport, e.g. RTP. iSAC codec delivers high-quality speech in both low-bit rate and high-bit rate voice applications.
API function call summary
iSACFIX_decoderinit(): initialize an iSAC decode channel
iSACFIX_encode(): perform iSAC encode
iSACFIXdecode(): perform iSAC decode