SYNTHESIS OF LOST BLOCKS OF DIGITAL AUDIO SIGNAL WITH PITCH PERIOD CORRECTION Russian patent published in 2011 - IPC G10L19/00 

FIELD: information technology.

SUBSTANCE: invention relates to signal modification before pitch period repetition for the synthesis of blocks lost when decoding digital audio signals. The effects of repetition of transients, such as plosives of a speech signal, are avoided by comparing the samples of a pitch period with those of the previous pitch period. The signal is preferentially modified by selecting the minimum between a current sample (e(3)) of the last pitch period (T_j) and at least one sample (e(2-T₀)) of essentially the same position in the previous pitch period (T_j-1).

EFFECT: high quality of decoding during loss of data blocks.

12 cl, 12 dwg