AUDIO ENCODING DEVICE, AN AUDIO ENCODING METHOD, AN AUDIO ENCODING PROGRAM, AN AUDIO DECODING DEVICE, AN AUDIO DECODING METHOD AND AN AUDIO DECODING PROGRAM Russian patent published in 2020 - IPC G10L19/05 G10L19/09 

FIELD: data processing.

SUBSTANCE: invention relates to means for encoding an audio signal. Audio encoding device comprises: an audio encoder for encoding an audio signal and a side information encoder for calculating a parameter for a predictive signal in CELP coding as side information to be used when masking packet loss in CELP coding. Audio encoder calculates an index which represents characteristics of the frame to be encoded and sends the index to the side information encoder. When the frame to be encoded is in a certain class of frames, the delay of the main tone of the prediction frame signal to be encoded is included as side information in the packet of the frame to be encoded. When a frame to be encoded is not in a specific frame class, the pitch lag is not included in the frame packet to be encoded.

EFFECT: technical result is higher efficiency of encoding an audio signal.

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