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VLSI design of a FNNPDS encoder for vector quantization  

Kim Hyeung-Cheol (Dept. of Electrical & Electronic Eng., Dongshin University)
Shim Jeong-Bo (Dept. of Electrical & Electronic Eng., Dongshin University)
Jo Je-Hwang (Dept. of Information & Communication Eng., Dongshin University)
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Abstract
We propose the design method for the VLSI architecture of FNNPDS combined PDS(partial distance search) and FNNS(fast nearest neighbor search), which are used to fast encoding in vector quantization, and obtain the results that FNNPDS(fast nearest neighbor partial distance search) is faster method than the conventional methods by simulation. In simulations, we investigate timing diagrams described searching time of the nearest codevector for an input vector, and compare the average clock cycles per input vector for Lena and Peppers images. According to the result of simulations, the number of the clock cycle of FNNPDS was reduced to $79.2\%\~11.7\%$ as compared with the number using the conventional techniques.
Keywords
PDS; FNNS; FNNPDS; fast searching; codebook;
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