Frequency-domain coding using masking avoids transmitting masked sound information
Evidence
Although noise shaping provides a means of psychoacoustically shaping the quantization noise, it is difficult to achieve very low bit rates using it. In particular, one needs to be able to avoid transmitting information in frequency regions that either contain no signal or are masked by other signal components. To do this easily, one must work in the frequency domain. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2672
Related
- Very low bit-rate audio coding requires working in the frequency domain (similarity 0.86)
- Masked audio components below the masking threshold need no bits transmitted (similarity 0.84)
- Uniform masking noise can substitute for threshold-in-quiet across all frequencies. (similarity 0.84)
- Uniform masking noise is engineered as the inverse of white-noise masking’s frequency dependence. (similarity 0.84)
- White noise masking of tones is linear but frequency-dependent above 500 Hz (similarity 0.84)
- Uniform masking noise mirrors white-noise masking and gives flat thresholds (similarity 0.83)
- A masker’s intensity, frequency content, and temporal pattern determine its masking capability. (similarity 0.83)
- Masking depends on acoustic relationships between masker and signal, not on subjective noise. (similarity 0.83)
- Digital noise can be shaped to hide where hearing is least sensitive (similarity 0.83)
- Masking effectiveness depends on masker-signal power, frequency, and timing relationships (similarity 0.83)
- Perceptual coders exploit masking to cut audio storage and bandwidth (similarity 0.82)
- Narrower frequency bands make audio signals less correlated and easier to quantize (similarity 0.82)
- Masked threshold rises once noise bandwidth exceeds the critical bandwidth (similarity 0.82)
- Frequency masking is modelled as convolution with a spreading function (similarity 0.82)
- Masking measurements require noise slopes steeper than the ear’s own selectivity (similarity 0.82)