METHOD OF ENCODING AND DECODING AUDIO SIGNAL AND DEVICE FOR REALISING SAID METHOD Russian patent published in 2013 - IPC G01L19/00 

FIELD: information technology.

SUBSTANCE: spatial information associated with an audio signal is encoded into a bit stream which is transmitted to a decoder or is recorded on a data storage medium. The bit stream contains a different syntax associated with time, frequency and spatial regions, and also includes one or more data structures (e.g., frames) which contain ordered sets of time intervals for which certain parameters are used. The data structures can be fixed or variable. A data structure type indicator may be inserted in the bit stream to enable the decoder to determine the data structure type and activate the corresponding decoding process. The data structure includes position information which can be used by the decoder to identify the correct time interval for which the given set of parameters is used. The position information of the time interval may be encoded using a fixed number of bits or a variable number of bits based on the data structure type indicated by the data structure type indicator. For variable type data structures, position information may be encoded by a variable number of bits based on the position of the time interval in the ordered set of time intervals.

EFFECT: transmission of a multichannel audio signal with low bit rates.

8 cl, 26 dwg