Real-time VQ codebook generation hardware for speech processing
Diana Chase, A. Gersho · 2003
A hardware subsystem is described which, in conjunction with an IBM PC, facilitates the development of various types of vector-quantization (VQ)-based speech coders and also serves as a powerful general-purpose DSP (digital-signal-processor) development system. Each iteration of the usual VQ codebook-design algorithm can be performed by playing, in real-time, an analog cassette tape of recorded speech into the hardware. The hardware is based on the TMS320C25 processor and a semicustom VLSI coprocessor used for VQ codebook searching. The architecture of the system is described and some of the most useful applications that it supports are outlined.>