Fixed-point DSP Implementation of HVXC Encoder/Decoder on OakDSPCore Platform

P. Zervas, I. Potamitis, N. Fakotakis, and G. Kokkinakis (Greece)


Speech coding, floating point arithmetic, fixed point arithmetic, Digital Signal Processing, MPEG coding / decoding.


This contribution describes the implementation of the HVXC vocoder fixed rate mode in 2 kbit/s on 16 bit fixed-point OakDSPCore Digital Signal Processor. The implementation we discuss is completely based on a 16 bit fixed-point representation and we present the requirements of the encoder/decoder in terms of computational load for real time operation with a view to applying the implemented version to mobile applications.

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