APPARATUS AND METHOD FOR SYNCHRONIZING MULTICHANNEL EXTENSION DATA WITH AN AUDIO SIGNAL AND FOR PROCESSING THE AUDIO SIGNAL

摘要

For synchronizing multichannel extension data with an audio signal, wherein the audio signal includes block division information and the multichannel extension data include reference audio signal fingerprint information, the block division information in the audio signal is detected by means of a block detector. Thereupon, block division of the audio signal is performed by a fingerprint calculator according to the block division information in order to obtain a sequence of test audio signal fingerprints. In addition to that, a sequence of reference audio signal fingerprints is extracted from the reference audio signal fingerprint information of the multichannel extension data. Both sequences of fingerprints are correlated in order to obtain a correlation result, by which a compensator is controlled in order to reduce or eliminate a time offset between the multichannel extension data and the audio signal.

主权项

1. An apparatus for processing an audio signal, comprising:
a fingerprint calculator for calculating a fingerprint per block of the audio signal for a sequence of subsequent blocks in order to acquire a sequence of reference audio signal fingerprint information, wherein the fingerprint calculator is implemented to use predetermined block division information for calculating the sequence of reference audio signal fingerprint information, or to store used block division information in association with the audio signal; a fingerprint information embedder for associating the reference audio signal fingerprint information with the multichannel extension data, wherein the multichannel extension data are implemented such that an approximation of a multichannel audio signal can be determined with a block of the multichannel extension data together with a block of the audio signal, wherein the fingerprint information embedder is implemented to embed the reference fingerprint information for the block of the audio signal into the block of the multichannel extension data or to insert it into an output signal in association with the block of multichannel extension data; and an output interface for outputting the output signal.