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10 lines
564 B
Text
10 lines
564 B
Text
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shorten reduces the size of waveform files (such as audio) using
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Huffman coding of prediction residuals and optional additional
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quantisation. In lossless mode the amount of compression obtained
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depends on the nature of the waveform. Those composing of low
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frequencies and low amplitudes give the best compression, which may
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be 2:1 or better. Lossy compression operates by specifying a minimum
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acceptable segmental signal to noise ratio or a maximum bit rate. Lossy
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compression operates by zeroing the lower order bits of the waveform,
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so retaining waveform shape.
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