CA2603219A1 - Method and apparatus for vector quantizing of a spectral envelope representation - Google Patents
Method and apparatus for vector quantizing of a spectral envelope representation Download PDFInfo
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- CA2603219A1 CA2603219A1 CA002603219A CA2603219A CA2603219A1 CA 2603219 A1 CA2603219 A1 CA 2603219A1 CA 002603219 A CA002603219 A CA 002603219A CA 2603219 A CA2603219 A CA 2603219A CA 2603219 A1 CA2603219 A1 CA 2603219A1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/0204—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders using subband decomposition
- G10L19/0208—Subband vocoders
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
- G10L21/0388—Details of processing therefor
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/032—Quantisation or dequantisation of spectral components
- G10L19/038—Vector quantisation, e.g. TwinVQ audio
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
- G10L19/18—Vocoders using multiple modes
- G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L21/0232—Processing in the frequency domain
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
Abstract
A quantizer according to an embodiment is configured to quantize a smoothed value of an input value (e.g., a vector of line spectral frequencies) to produce a corresponding output value, where the smoothed value is based on a scale factor and a quantization error of a previous output value.
Claims (23)
1. A method for signal processing, said method comprising:
encoding a first frame and a second frame of a speech signal to produce corresponding first and second vectors, wherein the first vector represents a spectral envelope of the speech signal during the first frame and the second vector represents a spectral envelope of the speech signal during the second frame;
generating a first quantized vector, said generating including quantizing a third vector that is based on'at least a portion of the first vector;
calculating a quantization error of the first quantized vector;
calculating a fourth vector, said calculating including adding a scaled version of the quantization error to at least a portion of the second vector; and quantizing the fourth vector.
encoding a first frame and a second frame of a speech signal to produce corresponding first and second vectors, wherein the first vector represents a spectral envelope of the speech signal during the first frame and the second vector represents a spectral envelope of the speech signal during the second frame;
generating a first quantized vector, said generating including quantizing a third vector that is based on'at least a portion of the first vector;
calculating a quantization error of the first quantized vector;
calculating a fourth vector, said calculating including adding a scaled version of the quantization error to at least a portion of the second vector; and quantizing the fourth vector.
2. The method according to claim 1, wherein said calculating a quantization error includes calculating a difference between the first quantized vector and the third vector.
3. The method according to claim 1, wherein said calculating a quantization error includes calculating a difference between the first quantized vector and at least a portion of the first vector.
4. The method according to claim 1, said method including calculating the scaled quantization error, said calculating comprising multiplying the quantization error by a scale factor, wherein the scale factor is based on a distance between at least a portion of the first vector and a corresponding portion of the second vector.
5. The method according to claim 4, wherein each among the first and second vectors includes a plurality of line spectral frequencies.
6. The method according to claim 1, wherein each among the first and second vectors includes a representation of a plurality of linear prediction filter coefficients.
7. The method according to claim 1, wherein each among the first and second vectors includes a plurality of line spectral frequencies.
8. A data storage medium having machine-executable instructions describing the method according to claim 1.
9. An apparatus comprising:
a speech encoder configured to encode a first frame of a speech signal into at least a first and to encode a second frame of a speech signal into at least a second vector, wherein the first vector represents a spectral envelope of the speech signal during the first frame and the second vector represents a spectral envelope of the speech signal during the second frame, a quantizer configured to quantize a third vector that is based on at least a portion of the first vector to generate a first quantized vector;
a first adder configured to calculate a quantization error of the first quantized vector; and a second adder configured to add a scaled version of the quantization error to at least a portion of the second vector to calculate a fourth vector;
wherein said quantizer is configured to quantize the fourth vector.
a speech encoder configured to encode a first frame of a speech signal into at least a first and to encode a second frame of a speech signal into at least a second vector, wherein the first vector represents a spectral envelope of the speech signal during the first frame and the second vector represents a spectral envelope of the speech signal during the second frame, a quantizer configured to quantize a third vector that is based on at least a portion of the first vector to generate a first quantized vector;
a first adder configured to calculate a quantization error of the first quantized vector; and a second adder configured to add a scaled version of the quantization error to at least a portion of the second vector to calculate a fourth vector;
wherein said quantizer is configured to quantize the fourth vector.
10. The apparatus according to claim 9, wherein said first adder is configured to calculate the quantization error based on a difference between the first quantized vector and the third vector.
11. The apparatus according to claim 9, wherein said first adder is configured to calculate the quantization error based on a difference between the first quantized vector and at least a portion of the first vector.
12. The apparatus according to claim 9, said apparatus including a multiplier configured to calculating the scaled quantization error based on a product of the quantization error and a scale factor, wherein said apparatus includes logic configured to calculate the scale factor based on a distance between at least a portion of the first vector and a corresponding portion of the second vector.
13. The apparatus according to claim 12, wherein each among the first and second vectors includes a plurality of line spectral frequencies.
14. The apparatus according to claim 9, wherein each among the first and second vectors includes a representation of a plurality of linear prediction filter coefficients.
15. The apparatus according to claim 9, wherein each among the first and second vectors includes a plurality of line spectral frequencies.
16. The apparatus according to claim 9, said apparatus comprising a device for wireless communications.
17. The apparatus according to claim 9, said apparatus comprising a device configured to transmit a plurality of packets compliant with a version of the Internet Protocol, wherein the plurality of packets describes the first quantized vector.
18. An apparatus comprising:
means for encoding a first frame and a second frame of a speech signal to produce corresponding first and second vectors, wherein the first vector represents a spectral envelope of the speech signal during the first frame and the second vector represents a spectral envelope of the speech signal during the second frame;
means for generating a first quantized vector, said generating including quantizing a third vector that is based on at least a portion of the first vector;
means for calculating a quantization error of the first quantized vector; and means for calculating a fourth vector, said calculating including adding a scaled version of the quantization error to at least a portion of the second vector, wherein said means for generating a first quantized vector is configured to quantize the fourth vector.
means for encoding a first frame and a second frame of a speech signal to produce corresponding first and second vectors, wherein the first vector represents a spectral envelope of the speech signal during the first frame and the second vector represents a spectral envelope of the speech signal during the second frame;
means for generating a first quantized vector, said generating including quantizing a third vector that is based on at least a portion of the first vector;
means for calculating a quantization error of the first quantized vector; and means for calculating a fourth vector, said calculating including adding a scaled version of the quantization error to at least a portion of the second vector, wherein said means for generating a first quantized vector is configured to quantize the fourth vector.
19. The apparatus according to claim 18, wherein said means for calculating a quantization error is configured to calculate the quantization error based on a difference between the first quantized vector and the third vector.
20. The apparatus according to claim 18, wherein said means for calculating a quantization error is configured to calculate the quantization error based on a difference between the first quantized vector and at least a portion of the first vector.
21. The apparatus according to claim 18, said apparatus including means for calculating the scaled quantization error, said calculating comprising multiplying the quantization error by a scale factor, wherein said apparatus comprises logic configured to calculate the scale factor based on a distance between at least a portion of the first vector and a corresponding portion of the second vector.
22. The apparatus according to claim 21, wherein each among the first and second vectors includes a plurality of line spectral frequencies.
23. The apparatus according to claim 18, said apparatus comprising a device for wireless communications.
Applications Claiming Priority (5)
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US66790105P | 2005-04-01 | 2005-04-01 | |
US60/667,901 | 2005-04-01 | ||
US67396505P | 2005-04-22 | 2005-04-22 | |
US60/673,965 | 2005-04-22 | ||
PCT/US2006/012227 WO2006107833A1 (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for vector quantizing of a spectral envelope representation |
Publications (2)
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CA2603219A1 true CA2603219A1 (en) | 2006-10-12 |
CA2603219C CA2603219C (en) | 2011-10-11 |
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CA2603246A Active CA2603246C (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for anti-sparseness filtering |
CA2603255A Active CA2603255C (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for wideband speech coding |
CA2602804A Active CA2602804C (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for highband burst suppression |
CA2602806A Active CA2602806C (en) | 2005-04-01 | 2006-04-03 | Methods and apparatus for encoding and decoding an highband portion of a speech signal |
CA2603229A Active CA2603229C (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for split-band encoding of speech signals |
CA2603219A Active CA2603219C (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for vector quantizing of a spectral envelope representation |
CA2603187A Active CA2603187C (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for highband excitation generation |
CA2603231A Active CA2603231C (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for highband time warping |
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CA2603255A Active CA2603255C (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for wideband speech coding |
CA2602804A Active CA2602804C (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for highband burst suppression |
CA2602806A Active CA2602806C (en) | 2005-04-01 | 2006-04-03 | Methods and apparatus for encoding and decoding an highband portion of a speech signal |
CA2603229A Active CA2603229C (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for split-band encoding of speech signals |
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CA2603231A Active CA2603231C (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for highband time warping |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2010003253A1 (en) * | 2008-07-10 | 2010-01-14 | Voiceage Corporation | Variable bit rate lpc filter quantizing and inverse quantizing device and method |
US8332213B2 (en) | 2008-07-10 | 2012-12-11 | Voiceage Corporation | Multi-reference LPC filter quantization and inverse quantization device and method |
US8712764B2 (en) | 2008-07-10 | 2014-04-29 | Voiceage Corporation | Device and method for quantizing and inverse quantizing LPC filters in a super-frame |
US9245532B2 (en) | 2008-07-10 | 2016-01-26 | Voiceage Corporation | Variable bit rate LPC filter quantizing and inverse quantizing device and method |
USRE49363E1 (en) | 2008-07-10 | 2023-01-10 | Voiceage Corporation | Variable bit rate LPC filter quantizing and inverse quantizing device and method |
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