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Method and apparatus for reproducing speech signals and method for transmitting same

A technology of speech signal and generating device, applied in speech analysis, speech synthesis, digital recording/reproduction, etc., can solve problems such as conversion, difficulty in time axis speed conversion, etc.

Inactive Publication Date: 2004-06-23
SONY CORP
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Problems solved by technology

[0003] Meanwhile, with the development of high-efficiency speech coding methods that process signals on the time axis, such as Excited Linear Prediction (CELP), since a large number of signal output operations are implemented by the decoder, difficulties are encountered in the speed conversion of the time axis
[0004] In addition, the above method cannot be used for conversions such as pitch rate, because the speed control is implemented in the decoding linear range

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  • Method and apparatus for reproducing speech signals and method for transmitting same
  • Method and apparatus for reproducing speech signals and method for transmitting same
  • Method and apparatus for reproducing speech signals and method for transmitting same

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Embodiment Construction

[0039] The preferred embodiment of the voice signal reproduction method and device and the voice signal transmission method of the present invention will be described in detail with reference to the accompanying drawings.

[0040] Firstly, the voice signal reproducing apparatus will be described, including the voice signal reproducing method and apparatus. figure 1 Shown is the structure of a speech signal reproduction device, in which the input speech signal is decomposed according to the predetermined frame unit on the time axis, and the coding parameters are determined according to the frame coding, and the sine wave and Noise is synthesized to reproduce the speech signal.

[0041] In particular, the speech signal device 1 interpolates the coding parameters to obtain coding modification parameters associated with the required time point, and the sine wave and noise are synthesized according to the modification coding parameters. Although sine waves and noise are synthesize...

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Abstract

An encoding unit 2 divides speech signals entering an input terminal 10 in terms of frames as units and encodes the divided signals on the frame basis to output encoding parameters such as line spectral pair (LSP) parameters, pitch, voiced (V) / unvoiced (UV) or spectral amplitude Am. The modified encoding parameter calculating unit 3 interpolates the encoding parameters for calculating modified encoding parameters associated with desired time points. A decoding unit 6 synthesizes sine waves and the noise based upon the modified encoding parameters and outputs the synthesized speech signals at an output terminal 37. Speed control can be achieved easily at an arbitrary rate over a wide range with high sound quality with the phoneme and the pitch remaining unchanged.

Description

technical field [0001] The present invention relates to a method and device for reproducing speech signals. In the device, the input speech signal is divided into multi-frame units and encoded to determine encoding parameters. According to the parameters, at least sine waves can be synthesized to reproduce the speech signal. The invention also relates to a method for delivering modified coding parameters obtained by interpolating the coding parameters. Background technique [0002] At present, there are a variety of coding methods for compressing signals. These methods are realized by using the statistical characteristics of the time domain and frequency domain of the audio signal and the psychoacoustic characteristics of the human auditory system. The audio signal includes speech signals and acoustic signals. These coding methods are broadly classified into time-domain coding, frequency-domain coding, and decomposition / synthesis coding. [0003] Meanwhile, with the develop...

Claims

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Application Information

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IPC IPC(8): G10L19/038G10L13/00G10L19/04G10L19/08G10L19/087H03M7/30
CPCG10L19/02G10L19/10G10L21/04G10L2019/0012G11B20/10
Inventor 西口正之
Owner SONY CORP
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