MP3 Decoder on the Blackfin

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MP3 Decoder on the Blackfin

• Ivan Lee , Sep. 2004

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Outline

• MP3 Encoder/Decoder overview
• Implement MP3 decoder
• Difference between float and fixed
• Optimize performance on DSP
• Q A

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MP3 Encoder overview
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MP3 Encoder overview (cont.)
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MP3 Encoder overview (cont.)
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MP3 Decoder overview
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Difference between float and fixed
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Optimize performance on DSP

• Variable optimization
• length, type, and calling parameter
• Algorithm optimization
• bandwidth , sorting , and approximate
  calculation
• Code optimization
• speed, size, and usage of assembly
• Memory allocation optimization
• data structure, buffer length, and usage of
  cache
• Preset tables
• huffman, sine/cosine , and exponent
• Hardware acceleration
• fractional operation, parallel process
  ,zero-overhead loop

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Q A