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Quantize outputs of critically sampled STFT
- Need
for critical sampling
(Hop size = Window length = DFT length)
rectangular window
- Quantization noise causes discontinuities in reconstruction due to rectangular window
- Need smooth post-window (synthesis filter) to hide frame-to-frame discontinuities,
e.g., weighted overlap-add with
- Smooth windows require at least 50% overlap
200% initial data expansion
- Is there a better way?
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Download Compression.pdf
Download Compression_2up.pdf
Download Compression_4up.pdf
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