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spaper01_slides - DESIGN AND IMPLEMENTATION OF A...

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DESIGN AND IMPLEMENTATION OF A MULTITHREADED HIGH RESOLUTION MPEG4 DECODER ON SANDBLASTER DSP Sagar Gaikwad and
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Agenda MPEG Encoding MPEG Decoding SandBlaster DSP Multithreading Decoder Conclusion
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MPEG Moving Picture Experts Group ( MPEG ) Group of experts formed to set standards for digital audio & video compression and transmission.
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Different Standards Mpeg-1 Ø Compressing audio/video on a VCD Ø Low bit rate (video<=1.5 Mbps, audio<=192 bps) Mpeg-2 Ø Compressing audio/video on DVD & broadcast TV Ø High bit rate (TV=3-15 Mbps, HDTV=15-30 Mbps) Mpeg-4 Ø Targeted for low resource devices viz.
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Mpeg-4 Encoding Image preparation Motion Estimati on DCT Quant AC/DC pred Scannin g VLC Image M B Motion Compensati on EM B M B Freq. domai n Q Q Arr Coded stream
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Mpeg-4 Decoding Image preparation IDCT De- Quant Inv AC/DC pred Inv Scannin g VLD Image Motion Compensati on Coded stream Next
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Macroblock Basic unit of coding in MPEG 16 x 16 pixel segment in a frame
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