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A DSP for DCT-based and wavelet-based video codecs for consumer applications

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10 Author(s)
Okamoto, K. ; Semicond. Res. Center, Matsushita Electr. Ind. Co. Ltd., Osaka, Japan ; Jinbo, T. ; Araki, T. ; Iizuka, Y.
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We have developed a video digital signal processor (VDSP1) which performs real-time encoding and decoding for discrete cosine transform- (DCT-) based algorithms such as ITU-T H.261, H.263 and wavelet-based subband encoding algorithms. This LSI is suitable for consumer applications, as it was implemented using 0.5 μm CMOS process technology to realize compactness (one million transistors on 65 mm2) and low power (maximum: 560 mW). It features a processing unit which performs wavelet filtering at high speeds, a compact DCT circuit, and a fast, flexible DRAM interface for low-cost systems. At 40 MHz, a single chip is capable of processing quarter common intermediate format (QCIF) (176×144 pixels) size pictures at a rate greater than 15 frames/s

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Solid-State Circuits, IEEE Journal of  (Volume:32 ,  Issue: 3 )