Patent ID: 9466275
Filing Date: 2016-10-11
CPC Classification: G10H

Claim Text:
1. A method for extracting tempo information of an audio signal, the method comprising: providing a compressed, spectral band replication (SBR) encoded bitstream of the audio signal, wherein the encoded bitstream comprises spectral band replication data; determining an amount of data comprised in one or more fill-element fields of the encoded bit-stream for a time-interval of the audio signal; determining a size of SBR payload data comprised in the encoded bit-stream for the time interval of the audio signal based on the amount of data comprised in the one or more fill-element fields of the encoded bit-stream for the time-interval of the audio signal; repeating the determining steps for successive time intervals of the encoded bit-stream of the audio signal, thereby determining a sequence of sizes of SBR payload data; identifying a periodicity in the sequence of sizes of SBR payload data; and extracting tempo information of the audio signal from the identified periodicity, wherein the method is implemented by an audio signal processing device comprising one or more hardware elements.