SOUND CODING DEVICE AND DECODING DEVICE Russian patent published in 2017 - IPC G10L19/02 G10L19/32 G10L19/06 

FIELD: physics.

SUBSTANCE: speech encoder contains a framing module configured to receive a set of blocks; wherein mentioned set of blocks comprises a number of consecutive blocks of MDCT transformation coefficients; wherein mentioned set of blocks serves as a sign of discrete values of the speech signal. The transform coefficient block contains a number of transform coefficients for the corresponding series of frequency resolution elements. In addition, the encoder comprises an envelope estimation module configured to determine the current envelope based on a series of successive blocks of transform coefficients. This current envelope serves as a sign of a number of spectral energy values for a corresponding series of frequency resolution elements. In addition, the encoder comprises an envelope interpolation module configured to determine a number of interpolated envelopes based on a series of successive blocks of transform coefficients, respectively, based on the current envelope.

EFFECT: improving the quality of encoding by providing a smooth transition between time-domain coding and frequency-domain coding.

20 cl, 10 dwg