A DSP FOR DCT-BASED AND WAVELET-BASED VIDEO CODECS FOR CONSUMER APPLICATIONS

We have developed a video digital signal processor (VDSP1(x)) which pe rforms real-time encoding and decoding for discrete cosine tranform- ( DCT-) based algorithms such as ITU-T H.261, H.263 and wavelet-based su bband encoding algorithms, This LSI is suitable for consumer applicati ons, as it was implemented using 0.5-mu m CMOS process technology to r ealize compactness (one million transistors on 65 mm(2)) and low power (maximum: 560 mW). It features a processing unit which performs wavel et filters at high speeds, a compact DCT circuit, and a fast, flexible DRAM interface for low-cost systems, At 40 MHz, a single chip is capa ble of processing quarter common intermediate format (QCIF) (176 x 144 pixels) size pictures at a rate greater than 15 frames/s.