AUDIO SIGNAL CODING AND DECODING METHOD AND DEVICE TO THIS END Russian patent published in 2009 - IPC G10L19/00 

FIELD: physics; acoustics.

SUBSTANCE: invention relates to audio signal processing. Spatial information related to an audio signal is coded in a bit stream which can be transmitted to a decoder or recorded on a data carrier. The bit stream has a different syntax, which is related to time, frequency and space domains, and also includes one or more data structures (for example frames) which contain ordered sets of time intervals with certain parametres. The data structures can be fixed or varying. An indicator of the type of data structure is included in the bit stream so that the decoder can determine types of data structures and start the corresponding decoding process. The data structure includes information on position, which is used by the decoder to identify the correct time interval for which a given set of parametres is applied. The information on position of the time interval is coded using a fixed number of bits or a varying number of bits based on the type of the data structure, indicated by data structure type indicator. For a varying type data structure, information on position is coded using a varying number of bits based on the position of the time interval in the ordered set of time intervals.

EFFECT: transmission of a multichannnel audio signal at low bit rate.

19 cl, 26 dwg