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A method and apparatus for predictively quantizing voiced speech includes a parameter generator and a quantizer. The parameter generator is configured to extract parameters from frames of predictive speech such as voiced speech, and to transform the extracted information to a frequency-domain repres

A method and apparatus for predictively quantizing voiced speech includes a parameter generator and a quantizer. The parameter generator is configured to extract parameters from frames of predictive speech such as voiced speech, and to transform the extracted information to a frequency-domain representation. The quantizer is configured to subtract a weighted sum of the parameters for previous frames from the parameter for the current frame. The quantizer is configured to quantize the difference value. A prototype extractor may be added to first extract a pitch period prototype to be processed by the parameter generator.

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What is claimed is: 1. A processor operable to execute a set of instructions stored in a storage medium to produce a set of quantized speech frame parameters, the parameters comprising: a predictively quantized pitch lag value; a quantized target error vector of amplitude components; predictively q

What is claimed is: 1. A processor operable to execute a set of instructions stored in a storage medium to produce a set of quantized speech frame parameters, the parameters comprising: a predictively quantized pitch lag value; a quantized target error vector of amplitude components; predictively quantized phase values; and a quantized target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized pitch lag value δLm, based on a formula: description="In-line Formulae" end="lead"δLm=Lm-ηm 1Lm1-ηm 2Lm2-. . .-ηmNLmN, description="In-line Formulae" end="tail" wherein the values Lm1, Lm2 . . . , LmN are the pitch lags for frames m1, m2, . . . , mN, respectively and the values ηm1, ηm2, . . . , ηmN are weights corresponding to frames m1, m2, . . . , mN, respectively. 2. A processor operable to execute a set of instructions stored in a storage medium to produce a set of quantized speech frame parameters, the parameters comprising: a predictively quantized pitch lag value; a quantized target error vector of amplitude components; predictively quantized phase values; and a quantized target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized target error vector of amplitude components is based on a target error vector of amplitude components (δAm) that is described by a formula: description="In-line Formulae" end="lead"δAm=Am-αm 1TAm1-α m2TAm2 -. . .-αmNTAmN ,description="In-line Formulae" end="tail" wherein the values Am1, Am2 . . . , AmN are a subset of the amplitude vector for frames m1, m2, . . . , mN, respectively, and the values αm1T, αm2T, . . . , αmNT are the transposes of corresponding weight vectors. 3. A processor operable to execute a set of instructions stored in a storage medium to produce a set of quantized speech frame parameters, the parameters comprising: a predictively quantized pitch lag value; a quantized target error vector of amplitude components; predictively quantized phase values; and a quantized target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized phase values are based on a formula: description="In-line Formulae" end="lead"φm=φ'm-1, description="In-line Formulae" end="tail" wherein φ'm-1 represent the phases of an extracted prototype. 4. A processor operable to execute a set of instructions stored in a storage medium to produce a set of quantized speech frame parameters, the parameters comprising: a predictively quantized pitch lag value; a quantized target error vector of amplitude components; predictively quantized phase values; and a quantized target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized target error vector of linear spectral information components is based on a target error vector of linear spectral information components (TMn) that is described by a formula: wherein LMn refers to an n-dimensional linear spectral information vector for frame M, the values {��M-1n, ��M-2n, . . . , ��M-Pn; n=0, 1, . . . , N-1} are the contributions of linear spectral information parameters of a number of frames, P, immediately prior to frame M, and the values {β1n, β2n, . . . , βPn; n=0, 1, . . . , N-1} are respective weights such that {β0n+β1n+, . . . , +βPn=1; n=0, 1 , . . . , N-1}. 5. A method for forming a set of quantized speech frame parameters, comprising: quantizing a pitch lag value; quantizing a target error vector of amplitude components; quantizing phase values; and quantizing a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized pitch lag value is obtained from value δLm , based on a formula: description="In-line Formulae" end="lead"δLm=Lm-ηm 1Lm1-ηm 2Lm2-. . .-ηmNLmN, description="In-line Formulae" end="tail" wherein the values Lm1, Lm2 . . . , LmN are the pitch lags for frames m1, m2, . . . , mN, respectively and the values ηm1, ηm2, . . . , ηmN are weights corresponding to frames m1, m2, . . . , mN, respectively. 6. A method for forming a set of quantized speech frame parameters, comprising: quantizing a pitch lag value; quantizing a target error vector of amplitude components; quantizing phase values; and quantizing a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized target error vector of amplitude components is based on a target error vector of amplitude components (δAm) that is described by a formula: description="In-line Formulae" end="lead"δAm=Am-αm 1TAm1-α m2TAm2 -. . .-αmNTAmN ,description="In-line Formulae" end="tail" wherein the values Am1, Am2 . . . , AmN are a subset of the amplitude vector for frames m1, m2, . . . , mN, respectively, and the values αm1T, αm2T, . . . , αmNT are the transposes of corresponding weight vectors. 7. A method for forming a set of quantized speech frame parameters, comprising: quantizing a pitch lag value; quantizing a target error vector of amplitude components; quantizing phase values; and quantizing a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized phase values are based on-a formula: description="In-line Formulae" end="lead"φm=φ'm-1, description="In-line Formulae" end="tail" wherein φ'm-1 represent the phases of an extracted prototype. 8. A method for forming a set of quantized speech frame parameters, comprising: quantizing a pitch lag value; quantizing a target error vector of amplitude components; quantizing phase values; and quantizing a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized target error vector of linear spectral information components is based on a target error vector of linear spectral information components (TMn) that is described by a formula: wherein LMn refers to an n-dimensional linear spectral information vector for frame M, the values {��M-1n, ��M-2n, . . . , ��M-Pn; n=0, 1, . . . , N-1} are the contributions of linear spectral information parameters of a number of frames, P, immediately prior to frame M, and the values {β1n, β2n, . . . , βPn; n=0, 1, . . . , N-1} are respective weights such that {β0n+β1n+, . . . , +βPn=1; n=0, 1 , . . . , N-1}. 9. A method for forming a set of quantized speech frame parameters, comprising: quantizing a pitch lag value; quantizing a target error vector of amplitude components; quantizing phase values; and quantizing a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, further comprising extracting the pitch lag value, the amplitude components, the phase values, and the linear spectral information components from a plurality of voiced speech frames. 10. A method for forming a set of quantized speech frame parameters, comprising: quantizing a pitch lag value; quantizing a target error vector of amplitude components; quantizing phase values; and quantizing a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, further comprising transmitting the set of quantized speech frame parameters across a wireless communication channel. 11. An apparatus comprising: means for quantizing a pitch lag value; means for quantizing a target error vector of amplitude components; means for quantizing phase values; means for quantizing a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame; and means for transmitting a packet of the quantized error vectors across a wireless communication channel. 12. An apparatus comprising: means for quantizing a pitch lag value; means for quantizing a target error vector of amplitude components; means for quantizing phase values; and means for quantizing a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized pitch lag value is obtained from value δLm, based on formula: description="In-line Formulae" end="lead"δLm=Lm-ηm 1Lm1-ηm 2Lm2-. . .-ηmNLmN, description="In-line Formulae" end="tail" wherein the values Lm1, Lm2 . . . , LmN are the pitch lags for frames m1, m2, . . . , mN, respectively and the values ηm1, ηm2. . . , ηmN are weights corresponding to frames m1, m2, . . . , mN, respectively. 13. An apparatus comprising: means for quantizing a pitch lag value; means for quantizing a target error vector of amplitude components; means for quantizing phase values; and means for quantizing a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components,the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized target error vector of amplitude components is based on a target error vector of amplitude components (δAm) that is described by a formula: description="In-line Formulae" end="lead"δAm=Am-αm 1TAm1-α m2TAm2 -. . .-αmNTAmN ,description="In-line Formulae" end="tail" wherein the values Am1, Am2 . . . , AmN are a subset of the amplitude vector for frames m1, m2, . . . , mN, respectively, and the values αm1T, αm2T, . . . , αmNT are the transposes of corresponding weight vectors. 14. An apparatus comprising: means for quantizing a pitch lag value; means for quantizing a target error vector of amplitude components; means for quantizing phase values; and means for quantizing a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized phase values are based on a formula: description="In-line Formulae" end="lead"φm=φ'm-1, description="In-line Formulae" end="tail" wherein φ'm-1 represent the phases of an extracted prototype. 15. An apparatus comprising: means for quantizing a pitch lag value; means for quantizing a target error vector of amplitude components; means for quantizing phase values; and means for quantizing a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized target error vector of linear spectral information components is based on a target error vector of linear spectral information components (TMn ) that is described by a formula: wherein LMn refers to an n-dimensional linear spectral information vector for frame M, the values {��M-1n, ��M-2n, . . . , ��M-Pn; n=0, 1, . . . , N-1} are the contributions of linear spectral information parameters of a number of frames, P, immediately prior to frame M, and the values {β1n, β2n, . . . , βPn; n=0, 1, . . . , N-1} are respective weights such that {β0n+β1n+, . . . , +βPn=1; n=0, 1, . . . , N-1}. 16. A processor operable to execute a set of instructions stored in a storage medium to produce a set of quantized speech frame parameters, the parameters comprising: a predictively quantized pitch lag value; a quantized target error vector of amplitude components; predictively quantized phase values; and a quantized target error vector of linear spectral information components, wherein the pitch lag value, amplitude components, phase values, and the linear spectral information components have been extracted from a voiced speech frame, the processor being further operable to execute a set of instructions stored in a storage medium to extract the pitch lag value, the amplitude components, the phase values, and the linear spectral information components from a plurality of voiced speech frames. 17. A processor operable to execute a set of instructions stored in a storage medium to produce a set of quantized speech frame parameters, the parameters comprising: a predictively quantized pitch lag value; a quantized target error vector of amplitude components; predictively quantized phase values; and a quantized target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, the processor being further operable to execute a set of instructions stored in a storage medium to transmit the set of quantized speech frame parameters across a wireless communication channel. 18. An apparatus comprising: means for quantizing a pitch lag value; means for quantizing a target error vector of amplitude components; means for quantizing phase values; means for quantizing a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame; and means for extracting the pitch lag value, the amplitude components, the phase values, and the linear spectral information components from a plurality of voiced speech frames. 19. A computer-readable medium comprising instructions that upon execution in a processor cause the processor to: quantize a pitch lag value; quantize a target error vector of amplitude components; quantize phase values; and quantize a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized pitch lag value is obtained from value δLm, based on a formula: description="In-line Formulae" end="lead"δLm=Lm-ηm 1Lm1-ηm 2Lm2-. . .-ηmNLmN, description="In-line Formulae" end="tail" wherein the values Lm 1, Lm 2 . . . , Lm N are the pitch lags for frames m1,m2, . . . mN, respectively and the values ηm1, ηm2. . . ,ηmN are weights corresponding to frames m1m2, . . . mN, respectively. 20. A computer-readable medium comprising instructions that upon execution in a processor cause the processor to: quantize a pitch lag value; quantize a target error vector of amplitude components; quantize phase values; and quantize a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized target error vector of amplitude components is based on a target error vector of amplitude components (δAm) that is described by a formula: description="In-line Formulae" end="lead"δAm=Am-αm 1TAm1-α m2TAm 2-. . .-αmNTAmN ,description="In-line Formulae" end="tail" wherein the values Am1,Am2. . . , AmN are a subset of the amplitude vector for frames m1,m2, . . . , mN, respectively, and the values αm1T, αm1T, αm 2T, . . . , αmNT are the transposes of corresponding weight vectors. 21. A computer-readable medium comprising instructions that upon execution in a processor cause the processor to: quantize a pitch lag value; quantize a target error vector of amplitude components; quantize phase values; and quantize a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized phase values are based on a formula: description="In-line Formulae" end="lead"φm=φ'm-1 description="In-line Formulae" end="tail" wherein φ'm-1 represent the phases of an extracted prototype. 22. A computer-readable medium comprising instructions that upon execution in a processor cause the processor to: quantize a pitch lag value; quantize a target error vector of amplitude components; quantize phase values; and quantize a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame, wherein the quantized target error vector of linear spectral information components is based on a target error vector of linear spectral information components (Tb) that is described by a formula: wherein LMn refers to an n-dimensional linear spectral information vector for frame M, the values {��M-1n, ��M-2n, . . . , ��M-Pn;n=0, 1, . . , N-1} are contributions of linear spectral information parameters of a number of frames, P, immediately prior to frame M, and the values {β1n, β2n, . . , βPn; N=0,1, . . . , N-1} are respective weights such that {β0n-β1n+, . . . , +βPn=1; n=0, 1, . . , N-1}. 23. A computer-readable medium comprising instructions that upon execution in a processor cause the processor to: quantize a pitch lag value; quantize a target error vector of amplitude components; quantize phase values; quantize a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame; and extract the pitch lag value, the amplitude components, the phase values, and the linear spectral information components from a plurality of voiced speech frames. 24. A computer-readable medium comprising instructions that upon execution in a processor cause the processor to: quantize a pitch lag value; quantize a target error vector of amplitude components; quantize phase values; quantize a target error vector of linear spectral information components, wherein the pitch lag value, the amplitude components, the phase values, and the linear spectral information components have been extracted from a voiced speech frame; and transmit the set of quantized speech frame parameters across a wireless communication channel.