SPEECH DECODER, SPEECH CODER, SPEECH DECODING METHOD, SPEECH ENCODING METHOD, SPEECH DECODING PROGRAM AND SPEECH CODING PROGRAM Russian patent published in 2021 - IPC G10L21/388 G10L25/18

Abstract RU 2742199 C1

FIELD: physics.

SUBSTANCE: invention relates to the computer equipment. Speech decoder comprises a demultiplexing means; low-frequency band decoding means; frequency conversion means; high-frequency band coded sequence analysing means; decoded an encoded sequence decoding means; means for generating a high-frequency band; a first-N^th means for calculating a low-frequency band time envelope; time envelope calculation means; time envelope correction means; and a signal output means, wherein the time envelope calculating means calculating the high-frequency band temporal envelope by performing processing using a plurality of low frequency band temporal envelopes, selected based on time envelope information from a plurality of determined processing prepared in advance, and a plurality of determined processing includes a time-domain smoothing process.

EFFECT: technical result consists in the leading and lagging echo reduction.

2 cl, 40 dwg

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RU 2 742 199 C1

Authors

Kikuiri, Kei

Yamaguchi, Atsushi

Dates

2021-02-03—Published

2020-03-19—Filed