ITU G.711.0 Software
- Lossless compression of G.711 a-law and mu-law data
- Configurable frame size (40, 80, 160, 240 and 320 samples)
- Optimized for DSPs, RiSC, CISC processors
- ITU G.711.0 compliant
VOCAL offers the G.711.0 codec software as a standalone algorithm, as part of a modular software library suite, as well as with a VoIP stack.
G.711.0
ITU G.711.0 Lossless Codec is a variable bit rate codec which further compresses the G.711 A-law or mu-law symbols. G.711.0 can encode a frame of 40, 80, 160, 240 or 320 samples, and is configurable from frame to frame. The compression rate of the codec is dependent on the input characteristics of that frame’s signal, and is most effective on zero-mean speech and audio signals. The compression of a frame is independent of any previous frame. Thus, the only algorithm latency is a result of the buffering of the frame sample data.
G.711.0 codec employs multiple potential coding schemes. The coding method used for a given frame is selected by analysis of the input data and evaluation of multiple coding schemes. If the input frame values are between -2 and 1 or is constant, then a simple coding method will be selected. Otherwise, multiple coding methods will be tested to determine which produces the best result. A prefix code is placed as a header on the encoded data. That code will inform the decoder on which encoding scheme was used.
Features
- Compliant with G.711.0 Specification
- Optimized for high performance on leading edge DSP architectures
- Multichannel implementation
- Multi-tasking environment compatible
- Selectable frame/buffer memory size according to the system needs
- MISRA compliant version (with limited deviations) available
More Information
- Audio Processing Software
- Fractional Resampling
- Efficient Implementation of LPC Analysis Filters
- Linear Phase Filters in Acoustic Echo Cancellation
- Audio Solutions
Platforms
VOCAL’s optimized vocoder software is available for the following platforms. Please contact us for specific vocoder supported platforms.
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