PROTECTION AGAINST SIGNAL LIMITATION WITH USE OF PREVIOUSLY EXISTING METADATA OF AUDIO SIGNAL AMPLIFICATION COEFFICIENT Russian patent published in 2012 - IPC G10L19/14 

FIELD: information technologies.

SUBSTANCE: method is used to prevent limitation of a signal in case of mixing with reduction of a number of channels of a multi-channel signal to a stereophonic audio signal. In accordance with the method it is determined, whether the first value (4) of amplification on the basis of the received audio metadata is sufficient for protection against limitation of an audio signal. The audio metadata is introduced into the first flow (1) of audio data. In case when the first value (4) of amplification is not sufficient for protection, the appropriate first value (4) of amplification is replaced with an amplification value sufficient for protection against limitation of an audio signal. Preferably, in case when metadata referring to control of a dynamic range is not available in the first flow (1) of audio data, the method may add values of amplification sufficient for protection against signal limitation.

EFFECT: provision of signal limitation prevention based on received audio metadata in case of mixing with reduction of a number of channels in a multi-channel audio signal.

20 cl, 10 dwg