Noise shaping exploits hearing sensitivity to boost effective CD signal quality
Evidence
This technique is used to improve the quality of sounds on a CD. An example is Sony Super Bit Mapping (Akune et al., 1992), which uses psychoacoustic noise shaping to give an effective signal-to-noise ratio of 120 dB (20 bits) in our most sensitive frequency range. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2671
Categorization
- XREF: Connects to the broader theme of exploiting perceptual limits rather than physical fidelity, echoing the reader’s interest in how sound mechanics produce perceptual phenomena.
- CANDY: The idea that CD quality is improved by concentrating noise where ears are least sensitive is a neat, quickly-explained fact.
Related
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- Frequency-domain coding using masking avoids transmitting masked sound information (similarity 0.79)
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