Title :
A parallel vector-quantization processor eliminating redundant calculations for real-time motion picture compression
Author :
Nozawa, Toshiyuki ; Konda, Masahiro ; Fujibayashi, Masanori ; Imai, Makoto ; Kotani, Koji ; Sugawa, Shigetoshi ; Ohmi, Tadahiro
Author_Institution :
Dept. of Electron. Eng., Tohoku Univ., Sendai, Japan
Abstract :
A parallel vector-quantization (VQ) processor has been developed aiming at real-time compression of motion pictures using a 0.35-/spl mu/m triple-metal CMOS technology. The chip employs a new search algorithm for VQ encoding to reduce hardware volume. As a result, the die area of the chip is decreased to only 33% of that of conventional fully parallel design. This chip can handle 2048 template vectors by a single chip and is applicable to real-time compression of 30 frames/s full-color VGA (640/spl times/480 pixels) images. The chip operates at 33 MHz with power dissipation of 790 mW under 2.5-V power supply. A real-time motion picture compression system is demonstrated as an application of the chip. This system can transmit five full-color QVGA (320/spl times/240 pixels) images per second below 64 kb/s.
Keywords :
CMOS digital integrated circuits; application specific integrated circuits; colour; digital signal processing chips; image coding; image processing equipment; parallel architectures; real-time systems; vector quantisation; 0.35 micron; 2.5 V; 240 pixel; 307200 pixel; 320 pixel; 33 MHz; 480 pixel; 64 kbit/s; 640 pixel; 76800 pixel; 790 mW; VQ encoding; colour images; full-color VGA images; parallel VQ processor; parallel vector-quantization processor; real-time motion picture compression; redundant calculations elimination; search algorithm; triple-metal CMOS technology; CMOS process; CMOS technology; Encoding; Hardware; Image coding; Motion pictures; Pixel; Power dissipation; Power supplies; Real time systems;
Journal_Title :
Solid-State Circuits, IEEE Journal of
