Patent ID: 9697840
Date: 2017-07-04
CPC Classifications: G10H,G10L

Claim:
1. A method for processing a block of samples of an audio signal, the method being performed at a spectral band replication based audio encoder which includes a core encoder adapted to derive a block of frequency coefficients from the block of samples of the audio signal and to generate an encoded bitstream of the audio signal from the block of frequency coefficients, and the method comprising: receiving the block of frequency coefficients from the core encoder of the spectral band replication based audio encoder; determining a chroma vector for the block of samples of the audio signal based on the received block of frequency coefficients, wherein determining the chroma vector comprises applying frequency dependent psychoacoustic processing to the received block of frequency coefficients or to one or more frequency coefficients which are determined on the basis of the received block of frequency coefficients; determining melodic and/or harmonic content of the block of samples of the audio signal based on the chroma vector for the block of samples of the audio signal; and storing the melodic and/or harmonic content on media or transferring the melodic and/or harmonic content via a network.