Implementation of a 5.0 kb/s. coder for vehicular applications. II. Acoustic echo and noise canceller

Presents the results of research on the real-time implementation of a digital echo and vehicular noise canceller on a TMS320C50/51 platform to comply with the ongoing efforts on half-rate coder implementation at various industrial and academic research and development centers. The proposed echo and noise cancellers are expected to be interfaced with a speech coding system for use in an automobile environment subject to both road engine and wind noises and acoustic echos generated inside a vehicle. The echo canceller based on adaptive filtering techniques for automobile acoustics has been fully implemented using a DSP board equipped with a Texas instruments TMS320C50/51 processor and it is hosted on a PC. The authors have also completed the simulations for road engine, and wind noise cancellation based on beamforming and adaptive filtering techniques for a microphone array system