Patent EP0751493A2 successfully refreshed from Google Patents.
EP0751493A2
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Method and apparatus for reproducing speech signals and method for transmitting same
Assignee: Sony Corp
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Filing: 1996-06-19
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Granted: —
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Expires: 2016-06-19
Abstract
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 A m . 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.
Inventors
- 👤 Masayuki C/O Sony Corporation Nishiguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 13:09
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G10; G10L; G10L19/00; G10L19/02; G10L21/00; G10L21/04; G10L19/04; G10L19/08; G10L19/10; G10L2019/0001; G10L2019/0012
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
A method for reproducing an input speech signal based on encoding parameters determined by dividing the input speech signal into frames having predetermined length on the time axis and by encoding the input speech signal on the frame basis, comprising the steps of: interpolating the encoding parameter to determine modified encoding parameters associated with desired time points; and generating a modified speech signal different in rate from the input speech signal based on the modified encoding parameters.
Claim 2
Dependent Claim
33 words
The method for reproducing an input speech signal as claimed in claim 1 wherein the modified speech signal is produced by at least synthesizing sine waves in accordance with the modified encoding parameters.
Claim 3
Dependent Claim
32 words
The methoc for reproducing an input speech signal as claimed in claim 1 or 2 wherein the parameter period is changed by compressing or expanding the parameters before or after the interpolation.
Claim 4
Dependent Claim
44 words
The method for reproducing an input speech signal as claimed in claim 1, 2 or 3 wherein the interpolation of said encoding parameters is performed by linear interpolation of linear spectral pair parameters, pitch and a residual spectral envelope contained in the encoding parameters.
Claim 5
Dependent Claim
62 words
The method for reproducing an input speech signal as claimed in claim 1, 2 , 3 or 4 wherein the encoding parameters used are such parameters determined by representing short-term prediction residuals of the input speech signal as the synthesized sine wave and the noise and by encoding the frequency spectral information of each of the synthesized sine wave and the noise.
Claim 6
Independent Claim
89 words
An apparatus for reproducing a speech signal in which an input speech signal is regenerated based on encoding parameters determined by dividing the input speech signal into frames having predetermined length on the time axis and by encoding the input speech signal on the frame basis, comprising: interpolation means for interpolating the encoding parameters to determine modified encoding paramete.rs associated with desired time points; and speech signal generating means for generating a modified speech signal different in rate from the input speech signal based on the modified encoding parameters.
Claim 7
Dependent Claim
37 words
The speech signal generating apparatus as claimed in claim 6 wherein said speech signal generating means is for generating said modified speech signal by at least synthesizing the sine wave in accordance with the modified encoding parameters.
Claim 8
Dependent Claim
36 words
The speech signal generating apparatus as claimed in claim 6 or 7 further comprising period changing means at upstream or downstream of said interpolating means for compressing or expanding the parameters to change the parameter periods.
Claim 9
Dependent Claim
37 words
The speech signal generating apparatus as claimed in claim 6, 7 or 8 wherein said interpolating means is for performing linear interpolation on linear spectral pair parameters, pitch and residual spectral envelope contained in the encoding parameters.
Claim 10
Dependent Claim
58 words
The speech signal generating apparatus as claimed in claim 6, 7, 8 or 9 wherein the encoding parameters used are such parameters determined by representing short-term prediction residuals of the input speech signal as the synthesized sine wave and the noise and by encoding the frequency spectral information of each of the synthesized sine wave and the noise.
Claim 11
Independent Claim
59 words
A method for transmitting speech signals comprising the steps of; determining encoding parameters by dividing an input speech signal into frames having predetermined length on the time axis and by encoding the input speech signal on the frame basis; interpolating the encoding parameters to determine modified parameters associated with a desired time point; and transmitting the modified encoding parameters.
Claim 12
Dependent Claim
57 words
The method for transmitting the input speech signal as claimed in claim 11 wherein the encoding parameters used are such parameters determined by representing short-term prediction residuals of the input speech signal as the synthesized sine wave and the noise and by encoding the frequency spectral information of each of the synthesized sine wave and the noise.
References Cited (Backward Citations)
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