Typical signal quality measures involving noise are signal-to-noise ratio ( SNR or " S " / " N " ), signal-to-quantization noise ratio ( SQNR ) in " E " b / " N " 0 in digital transmission, carrier to noise ratio ( CNR ) before the detector in carrier-modulated systems, and noise figure in cascaded amplifiers.
32.
In the case of a signal that varies very quickly, such as the attack on a cymbal, we need a good temporal resolution of the same ( which implies less spectral resolution ), hence the block size must be to codify small for the quantization noise associated with this signal be temporarily confined in the vicinity of the same, so that this can be masked by noise that signal along the lines of masking temporary human ear.
