Method for speech coding, method for speech decoding and their apparatuses

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United States of America Patent

PATENT NO 9852740
SERIAL NO

15043189

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Abstract

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A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. In speech coding method according to a code-excited linear prediction (CELP) speech coding, a noise level of a speech in a concerning coding period is evaluated by using a code or coding result of at least one of spectrum information, power information, and pitch information, and various excitation codebooks are used based on an evaluation result.

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Patent Owner(s)

  • BLACKBERRY LIMITED;MITSUBISHI DENKI KABUSHIKI KAISHA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Yamaura, Tadashi Tokyo, JP 35 362

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