METHOD AND DEVICE FOR NOISE REDUCTION Russian patent published in 2009 - IPC G10L19/14 

FIELD: physics, acoustics.

SUBSTANCE: invention relates to the method of decoding signals, which are coded using a hybrid coder. Essence of the invention lies in the method of reducing interference (S-OUT) in the decoded signal, which is formed from the first decoded signal constituent (S_CELP) and the second decoded signal constituent (S_TDAC), containing the following stages: obtaining the first enveloping characteristics (ENV_CELP) of energy and the second enveloping characteristics (EN_TDAC) of energy of the first decoded signal constituent (S_CELP) and the second decoded signal constituent (S_TDAC), forming the characteristic number (R) depending on the comparison of the first and second enveloping characteristics (ENV_CELP, ENV_TDAC) of energy; output of the amplification coefficient (G) depending on the characteristic number (R); in the preferred manner, multiplication of second decoded signal constituent with the amplification coefficient.

EFFECT: providing a reduction of interference noises anticipating an echo and the following echo for signals, coding using a hybrid coder without requiring additional information.

13 cl, 4 dwg