FIELD: information technology.
SUBSTANCE: method and device for masking deletion of frames, caused by deletion of frames of an encoded audio signal during transmission from an encoder to a decoder, and for restoring the decoder after deletion of frames, includes, in the encoder: determination of masking/restoration parametres, including at least phase information relating to frames of the encoded audio signal. Masking/restoration parametres defined in the encoder are sent to the decoder, in which deletion of frames is masked in response to the received masking/restoration parametres. Masking deletion of frames includes repeated synchronisation, in response to the obtained phase information, of frames with masked deletion with corresponding frames of the audio signal encoded by the encoder. When masking/restoration parametres are not sent to the decoder, the decoder assesses phase information of each frame of the encoded audio signal which was deleted during transmission from the encoder to the decoder. Similarly, masking deletion of frames is performed in a decoder in response to the assessed phase information. Masking deletion of frames includes repeated synchronisation, in response to the assessed phase information, of each frame with masked deletion with the corresponding frame of the audio signal encoded by the encoder.
EFFECT: reliable encoding and decoding of audio signals.
74 cl, 13 dwg, 6 tbl
