An Efficient Implementation of Silence Compression Scheme for the Dual Rate Speech Coder G.723.1

摘要

This paper deals with the implementation of the Silence Compression Scheme for the G.723.1 codec on the Motorola DSP563xx (ONYX) family. The G.723.1 recommendation deals with compressing the speech or other audio signal component of multimedia services at very low bit rates. The silence compression scheme is Annex to the Recommendation G. 723.1.The current implementation is an enhancement of an existing real-time implementation of the G.723.1 codec. The G.723.1 Recommendation assumes the implementation of the speech coder on a 16 bit, fixed point processor. The implementation uses the full 24 bit precision of a Motorola DSP563xx device.