Switched-current technique for video compression and quantization

Portable consumer products need low-cost, low-power chips for realization of signal processing and image compression functions. In this paper a modification of such a chip for a digital video camera is presented. The chip contains an image sensing array composed of photodiodes, a two-dimensional DCT processor and an entropy coding section. The processor is designed in a switched-current (SI) technique and contains current mirrors and memory cells. In order to examine these elementary cells, an experimental chip in AMS 0.8 /spl mu/m technology was fabricated.