Synchronous SRC – SSRC
Arbitrary sample-rate converter. Code optimised for speed (fixed-point Q15) or for accuracy using floating-point arithmetics. The code is designed for 32bits processors Cortex-M and Cortex-A with NEON.
Link to the implementation details here.
Asynchronous SRC – ASRC
Low complexity Asynchronous Sample-Rate Converter optimised for drifts compensations in +/- 5000 ppm range. The code optimised for Cortex-M processors.
Link to the implementation details here.
DRC1
Low-complexity single-band audio compressor, with tunable attack and decay. Complexity number of 2 MAC per sample. Guarantee of no clipping, by construction.
PDM decimation
Pulse-density decimator, and PDM modulator using delta-sigma modulation.
Link to the implementation details here.
THDN
Matlab program, computation of THD+N of audio files (WAV, RAW, PDM). CCIR and A-weighting, compensation for distortions and jitter effects.
Link to the implementation details here.
BIQUAD
Assembly code programs for ARM-Cortex-M0, M4, M7, NEON, Coolflux. Using CMSIS-DSP APIs with fixed-point arithmetics.
Advanced SIMD NEON code written in assembly codes for ARMv8 Aarch64 and Aarch32. Super high-speed floating-point 32bits at less than 4 cycles per sample.
Link to the implementation details here.
SSRC x2 x3 x6
Low-latency sample-rate converter for Cortex-M4 and Coolflux. Low-latency optimised for speech communication devices and conformance to 3GPP/ITU standards.
In development
To be accelerated upon customer request
FVAD
Far-field sound and voice detection for Cortex-M.
BEAM
Two-MICs direction detection for Cortex-M0, alarm and robot/game use-cases. Noise reduction for Cortex-M3 and upper.
TASR
Phonetic and prosody recognizer for Cortex-M0.
HAID
Hearing-aid application for smart-phones.
VXCH
Voice changer for secure phone communications.