Patent
Voice decoding device, voice encoding device, and methods therefor
Toshiyuki Morii
- 01 Sep 2005
28
TL;DR: In this article, an encoding device capable of realizing a scalable CODEC of a high performance was proposed, where an LPC analyzing unit (551 ) analyzes an input voice ( 301 ) efficiently with a synthesized LPC parameter obtained from a core decoder ( 305 ), to acquire an encoded LPC coefficient.
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Abstract: An encoding device capable of realizing a scalable CODEC of a high performance. In this encoding device, an LPC analyzing unit ( 551 ) analyzes an input voice ( 301 ) efficiently with a synthesized LPC parameter obtained from a core decoder ( 305 ), to acquire an encoded LPC coefficient. An adaptive code note ( 552 ) is stored with its sound source codes, as acquired from the core decoder ( 305 ). The adaptive code note ( 552 ) and a stochastic code note ( 553 ) send sound source samples to a gain adjusting unit ( 554 ). This gain adjusting unit ( 554 ) multiplies the individual sound source samples by an amplification based on the gain parameters acquired from the core decoder ( 305 ), and then adds the products to acquire sound source vectors. These vectors are sent to an LPC synthesizing unit ( 555 ). This LPC synthesizing unit ( 555 ) filters the sound source vectors acquired at the gain adjusting unit ( 554 ), with the LPC parameter, to acquire a synthetic signal.
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Citations
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TL;DR: In this paper, a method for encoding audio frames by producing a first frame of coded audio samples by coding a first audio frame in a sequence of frames, producing at least a portion of a second frame of audio samples, and producing parameters for generating audio gap filler samples.
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