Patent ID: 9306524
Filing Date: 2016-04-05
CPC Classification: G10L,H03G

Claim Text:
1. A method of using a signal processing apparatus to determine an objective measure of the perceived loudness of an audio signal, the method comprising: accepting blocks of frequency-domain audio data into the signal processing apparatus, each accepted block of frequency-domain audio data having a block size of a set of block sizes, each accepted block of frequency-domain audio data being the transform of a corresponding block of time samples of an audio signal, the set of block sizes comprising a smallest block size and a largest block size, each block size being the smallest block size or an integer multiple of the smallest block size each block size of the set being no smaller than the smallest block size and no larger than the largest block size; determining and/or accepting one or more perceived loudness parameters of the accepted blocks or of delayed versions of the accepted blocks, determining at least one perceived loudness modification to the audio signal, the modification applicable in the frequency domain at the frequency resolution that corresponds to the largest block size, the determining of the at least one perceived loudness modification using the one or more perceived loudness parameters.