Low Bit-rate Video Coding Using a DSP for Consumer Applications

Hisashi INOUE  Shiro IWASAKI  Takashi KATSURA  Hitoshi FUJIMOTO  Shun-ichi KUROHMARU  Masatoshi MATSUO  Yasuo KOHASHI  Masayoshi TOUJIMA  Tomonori YONEZAWA  Kiyoshi OKAMOTO  Yasuo IIZUKA  Hiromasa NAKAJIMA  Junji MICHIYAMA  

IEICE TRANSACTIONS on Electronics   Vol.E81-C   No.5   pp.708-717
Publication Date: 1998/05/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Multimedia, Network, and DRAM LSIs)
digital signal processing,  discrete cosine transform,  ITU-T H. 261,  ITU-T H. 263,  symmetric biorthogonal wavelet,  subband coding,  

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We have developed a low bit-rate video coding using a video digital signal processor (DSP) called VDSP1χ, 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 features a processing unit which implements wavelet filters at high speeds, a compact DCT circuit, and a fast, flexible DRAM interface for low-cost systems. This system is capable of processing quarter common intermediate format (QCIF)(176144 pixels) size pictures at a rate greater than 15 frames/s.