Title :
A low-power analog CMOS vector quantizer
Author :
Tuttle, G.T. ; Fallahi, S. ; Abidi, A.A.
Author_Institution :
Integrated Circuits & Syst. Lab., California Univ., Los Angeles, CA, USA
Abstract :
The authors describe the implementation and performance of what might be termed a `Vector A/D Converter´. The IC stores a codebook of vectors on-chip, accepts a 16-element analog vector at the input, calculates the Euclidean distance between the input and all codevectors (referred to as global search), and outputs an 8-bit code to index the codevector closest to the input prompt. At a 5 MHz clock rate it dissipates less than 50 mW to quantize 16 element analog vectors once every 10 clock periods, giving a 30 Hz frame rate for a 512×512 pixel gray scale image
Keywords :
CMOS integrated circuits; analogue processing circuits; search problems; vector quantisation; 262144 pixels; 512 pixels; CMOS vector quantizer; IC; codebook; global search; gray scale image; implementation; performance; Analog integrated circuits; Clocks; Euclidean distance; Image coding; Laboratories; Pattern recognition; Scattering; Speech; Statistics; Vector quantization;
Conference_Titel :
Data Compression Conference, 1993. DCC '93.
Conference_Location :
Snowbird, UT
Print_ISBN :
0-8186-3392-1
DOI :
10.1109/DCC.1993.253108
