ATTENUATION OF ABNORMAL TONE, IN PARTICULAR, FOR GENERATION OF EXCITATION IN DECODER WITH INFORMATION UNAVAILABILITY Russian patent published in 2011 - IPC G10L19/00 

FIELD: information technologies.

SUBSTANCE: it is proposed to replace lost or erroneous units of this signal by means of synthesis during signal reception. For this purpose it is proposed to attenuate abnormal tone during generation of a synthesised signal. In particular, tone excitation is generated on the basis of a pitch period (T), calculated or transferred into a previous unit, if required, by means of application of plus or minus correction of one sample of this period duration (calculated by number of samples), by formation of groups (A, B, C, D), at least from two samples and by means of an arbitrary (B', C) or fixed inversion of sample positions in groups.

EFFECT: abnormal harmonicity in generated excitation is attenuated, and effect of abnormal tone in synthesis of a generated signal is attenuated.

11 cl, 7 dwg