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MUSICAM = ``Masking-pattern Universal Subband Integrated Coding and Multiplexing''
- Commonly referred to as ``MPEG Audio''
- Compresses 44.1kHz 16-bit audio from 706 Kbits/sec down to around 128 Kbits/sec (ratio = 5.5)
- Quality is ``transparent''
- Subband coder
- 32-band uniform FIR filter bank
- Uniformly spaced filters allow use of fast transform
- Less delay than a dyadic constant-Q filter bank
- Analysis filters are length 512
length
polyphase channel filters
- FFT used in parallel with filter bank
- Masking pattern based on spectral power estimate
- No entropy coding
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Download Compression.pdf
Download Compression_2up.pdf
Download Compression_4up.pdf
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