CA2564970A1 - Information signal processing by carrying out modification in the spectral/modulation spectral region representation - Google Patents
Information signal processing by carrying out modification in the spectral/modulation spectral region representation Download PDFInfo
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- CA2564970A1 CA2564970A1 CA002564970A CA2564970A CA2564970A1 CA 2564970 A1 CA2564970 A1 CA 2564970A1 CA 002564970 A CA002564970 A CA 002564970A CA 2564970 A CA2564970 A CA 2564970A CA 2564970 A1 CA2564970 A1 CA 2564970A1
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- 230000003595 spectral effect Effects 0.000 title claims abstract 118
- 238000012986 modification Methods 0.000 title abstract 2
- 230000004048 modification Effects 0.000 title abstract 2
- 230000001131 transforming effect Effects 0.000 claims abstract 3
- 238000000354 decomposition reaction Methods 0.000 claims 9
- 238000000034 method Methods 0.000 claims 3
- 238000004590 computer program Methods 0.000 claims 2
- 230000003247 decreasing effect Effects 0.000 claims 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 230000005236 sound signal Effects 0.000 claims 1
Classifications
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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
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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
- G10L19/0212—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 orthogonal transformation
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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
- G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
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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
- G10L2021/02087—Noise filtering the noise being separate speech, e.g. cocktail party
Abstract
Processing of information signals separated according to modulation and carrier components in a more controlled way is made possible by a device for processing an information signal (14) including means (20) for converting the information signal (14) to a time/spectral representation by block-wise transforming of the information signal and means (22) for converting the information signal from the time/spectral representation to a spectral/modulation spectral representation, wherein the means (22) for converting is designed such that the spectral /modulation spectral representation depends on both a magnitude component and a phase component of the time/spectral representation of the information signal (14). A means (24, 40) then performs a manipulation and/or modification of the information signal (14) in the spectral/modulation spectral representation to obtain a modified spectral/modulation spectral representation. A further means (26) finally forms a processed information signal (18) representing a processed version of the information signal (14) based on the modified spectral/modulation spectral representation.
Claims (19)
1. Device for processing an information signal (14), comprising means (20) for converting the information signal (14) to a time/spectral representation (74) by block-wise transforming of the information signal;
means (22) for converting the information signal from the time/spectral representation (74) to a spectral/modulation spectral representation (88) by means of a single frequency decomposition transform, wherein the means (22) for converting is designed such that the spectral/modulation spectral representation (88) depends on both a magnitude component and a phase component of the time/spectral representation (74) of the information signal (14);
means (24, 40) for manipulating the information signal (14) in the spectral/modulation spectral representation (88) to obtain a modified spectral/modulation spectral representation; and means (26) for forming a processed information signal (18) representing a processed version of the information signal (14) based on the modified spectral/modulation spectral representation.
means (22) for converting the information signal from the time/spectral representation (74) to a spectral/modulation spectral representation (88) by means of a single frequency decomposition transform, wherein the means (22) for converting is designed such that the spectral/modulation spectral representation (88) depends on both a magnitude component and a phase component of the time/spectral representation (74) of the information signal (14);
means (24, 40) for manipulating the information signal (14) in the spectral/modulation spectral representation (88) to obtain a modified spectral/modulation spectral representation; and means (26) for forming a processed information signal (18) representing a processed version of the information signal (14) based on the modified spectral/modulation spectral representation.
2. Device according to claim 1, wherein the means (20) for converting the information signal (14) to the time/spectral representation (74) is designed to decompose the time/spectral representation into a plurality of spectral components to obtain a sequence (82a, 82b, 82c, 82d) of complex spectral values per spectral component.
3. Device according to claim 2, wherein the means (22) for converting the information signal (14) from the time/spectral representation (74) to the spectral/modulation spectral representation (88) comprises means (36, 38) for block-wise spectral decomposition of the sequence (82a, 82b, 82c, 82d) of spectral values for a predetermined spectral component to obtain a portion of the spectral/modulation spectral representation (88).
4. Device according to claim 3, wherein the means (22) for block-wise spectral decomposition of the sequence (82a, 82b, 82c, 82d) of spectral values for a predetermined spectral component is designed to first multiply (84) the sequence (82a, 82b, 82c, 82d) of spectral values block-wise by a complex carrier such that a magnitude of a mean slope of a phase course of the sequence (82a, 82b, 82c, 82d) of spectral values is reduced block-wise to obtain demodulated blocks of spectral values, and to then spectrally decompose the demodulated blocks of spectral values block-wise to obtain the portion of the modified spectral/modulation spectral representation (88).
5. Device according to claim 4, wherein the means (22) for block-wise spectral decomposition of the sequence (82a, 82b, 82c, 82d) of complex spectral values for a predetermined spectral component comprises means (32) for block-wise varying, depending on the time/spectral representation (74) of the information signal, the complex carrier by which the sequence (82a, 82b, 82c, 82d) of complex spectral values is multiplied block-wise.
6. Device according to claim 5, wherein the means (32) for varying is designed to block-wise unwrap phases of the spectral values in the sequence of spectral values for block-wise varying of the complex carrier to obtain a phase course, to determine a mean slope of the phase course and to determine the complex carrier based on the mean slope.
7. Device according to claim 6, wherein the means (32) for varying is further designed to determine an axis portion of the phase course from the phase course and to further determine the complex carrier based on the axis portion.
8. Device according to one of claims 4 to 7, wherein the means (26) for forming comprises:
means (42) for back-converting the information signal from the modified spectral/modulation spectral representation to a modified time/spectral representation to obtain modified demodulated blocks of spectral values for the predetermined spectral component;
means (46) for block-wise multiplying the modified demodulated blocks of spectral values by a carrier complex conjugated with respect to the complex carrier to obtain modified blocks of spectral values; and means (44) for combining the modified blocks of spectral values to form a modified sequence of spectral values to obtain a portion of a time/spectral representation of the processed information signal (18).
means (42) for back-converting the information signal from the modified spectral/modulation spectral representation to a modified time/spectral representation to obtain modified demodulated blocks of spectral values for the predetermined spectral component;
means (46) for block-wise multiplying the modified demodulated blocks of spectral values by a carrier complex conjugated with respect to the complex carrier to obtain modified blocks of spectral values; and means (44) for combining the modified blocks of spectral values to form a modified sequence of spectral values to obtain a portion of a time/spectral representation of the processed information signal (18).
9. Device according to claim 8, wherein the means for forming further comprises:
means for back-converting the processed information signal (18) from the time/spectral representation to the time representation.
means for back-converting the processed information signal (18) from the time/spectral representation to the time representation.
10. Device according to one of the preceding claims, wherein the means (40) for modifying is designed to perform weighting of the modulation components of the spectral/modulation spectral representation (88) for modulation filtering, audio coding, source separation, reconstruction of the information signal, for error concealing or for superimposing a watermark on the information signal.
11. Device according to one of the preceding claims, wherein the information signal (14) is an audio signal, a video signal, a multimedia signal, a measurement signal or the like.
12. Device according to claim 1, wherein the means (20) for converting the information signal to the time/spectral representation (74) comprises:
block formation means (28) for forming a sequence of blocks of information values from the information signal (14); and means (30) for spectrally decomposing each of the sequence of blocks of information values to obtain a sequence of spectral value blocks, wherein each spectral value block comprises a spectral value (76) for each of a predetermined plurality of spectral components, so that the sequence of spectral value blocks per spectral component forms a sequence (82a-82d) of spectral values.
block formation means (28) for forming a sequence of blocks of information values from the information signal (14); and means (30) for spectrally decomposing each of the sequence of blocks of information values to obtain a sequence of spectral value blocks, wherein each spectral value block comprises a spectral value (76) for each of a predetermined plurality of spectral components, so that the sequence of spectral value blocks per spectral component forms a sequence (82a-82d) of spectral values.
13. Device according to claim 12, wherein the means (22) for converting the information signal (14) to the spectral/modulation spectral representation (88) comprises:
means (32-38) for spectrally decomposing a predetermined sequence of the sequences (82a-82d) of spectral values to obtain a block of modulation values, wherein the means (24; 40) for modifying is designed to modify the block (88) of modulation values to obtain a modified block of modulation values, which is part of the modified spectral/modulation spectral representation (88).
means (32-38) for spectrally decomposing a predetermined sequence of the sequences (82a-82d) of spectral values to obtain a block of modulation values, wherein the means (24; 40) for modifying is designed to modify the block (88) of modulation values to obtain a modified block of modulation values, which is part of the modified spectral/modulation spectral representation (88).
14. Device according to claim 13, wherein the means (26) for forming is designed to back-convert (42, 44, 46) the modified block of modulation values from the spectral decomposition to obtain a modified sequence of spectral values, and to back-convert (48) a sequence of modified spectral blocks based on the modified sequence of spectral values to obtain a sequence of modified blocks of information values, and to combine (50) the modified blocks of information values to obtain the processed information signal (18).
15. Device according to claim 14, wherein the means (20) for spectrally decomposing each of the sequence of blocks of information values is designed to first multiply each block of the sequence of blocks of information values by a window function and to then spectrally decompose it, and the means (26) for forming is designed to process the modified blocks of information values, when combining (50), such that the multiplication by the window function does not affect the processed information signal (18).
16. Device according to claim 13, wherein the means (20) for spectrally decomposing each of the sequence of blocks of information values is designed such that it provides a sequence (82a-82d) of complex spectral values in the spectral decomposition per spectral component, and the means (32, 34, 36, 38) for spectrally decomposing the predetermined sequence of the sequences (82a-82d) of spectral values is designed to first modify (34) the predetermined sequence (82a-82d) of spectral values such that a phase of the spectral values of the predetermined sequence of spectral values is increased or reduced by an amount steadily increasing or decreasing with the sequence to obtain a phase-modified sequence of spectral values, and then to spectrally decompose (38) the phase-modified sequence of spectral values to obtain the at least one block of modulation values, and the means for forming is designed to back-convert (42) the modified block of modulation values from the spectral decomposition to obtain a modified sequence of spectral values, to modify (46) the modified sequence of spectral values inversely to the means (34) for spectrally decomposing the predetermined sequence of the sequences of spectral values such that a phase of the spectral values of the at least one sequence of spectral values is increased or reduced by an amount steadily increasing or decreasing with the sequence to obtain a modified sequence of spectral values, to back-convert (48) a sequence of modified spectral blocks based on the modified sequence of spectral values to obtain a sequence of modified blocks of information values, and to combine (50) the modified blocks of information values to obtain the processed information signal (18).
17. Device according to one of the preceding claims, wherein the single frequency decomposition transform is a single discrete Fourier transform.
18. Method for processing an information signal (14), comprising converting (20) the information signal (14) to a time/spectral representation (74) by block-wise transforming of the information signal;
converting (22) the information signal from the time/spectral representation (74) to a spectral/modulation spectral representation (88) by means of a single frequency decomposition transform, wherein the conversion is performed such that the spectral/modulation spectral representation (88) depends on both a magnitude component and a phase component of the time/spectral representation (74) of the information signal (14);
modifying (24) the information signal (14) in the spectral/modulation spectral representation (88) to obtain a modified spectral/modulation spectral representation; and forming (26) a processed information signal (18) representing a processed version of the information signal (14) based on the modified spectral/modulation spectral representation.
converting (22) the information signal from the time/spectral representation (74) to a spectral/modulation spectral representation (88) by means of a single frequency decomposition transform, wherein the conversion is performed such that the spectral/modulation spectral representation (88) depends on both a magnitude component and a phase component of the time/spectral representation (74) of the information signal (14);
modifying (24) the information signal (14) in the spectral/modulation spectral representation (88) to obtain a modified spectral/modulation spectral representation; and forming (26) a processed information signal (18) representing a processed version of the information signal (14) based on the modified spectral/modulation spectral representation.
19. Computer program with a program code for performing the method according to claim 18 when the computer program runs on a computer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004021403.4 | 2004-04-30 | ||
| DE102004021403A DE102004021403A1 (en) | 2004-04-30 | 2004-04-30 | Information signal processing by modification in the spectral / modulation spectral range representation |
| PCT/EP2005/003064 WO2005109240A1 (en) | 2004-04-30 | 2005-03-22 | Information signal processing by carrying out modification in the spectral/modulation spectral region representation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2564970A1 true CA2564970A1 (en) | 2005-11-17 |
| CA2564970C CA2564970C (en) | 2012-02-07 |
Family
ID=34965409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2564970A Active CA2564970C (en) | 2004-04-30 | 2005-03-22 | Information signal processing by carrying out modification in the spectral/modulation spectral region representation |
Country Status (16)
| Country | Link |
|---|---|
| US (1) | US7574313B2 (en) |
| EP (1) | EP1741039B1 (en) |
| JP (1) | JP4473913B2 (en) |
| KR (1) | KR100851424B1 (en) |
| CN (1) | CN100583085C (en) |
| AT (1) | ATE458225T1 (en) |
| AU (1) | AU2005241157B8 (en) |
| BR (1) | BRPI0509818B1 (en) |
| CA (1) | CA2564970C (en) |
| DE (2) | DE102004021403A1 (en) |
| HK (1) | HK1097326A1 (en) |
| IL (1) | IL178671A (en) |
| MX (1) | MXPA06012424A (en) |
| NO (1) | NO337309B1 (en) |
| RU (1) | RU2351006C2 (en) |
| WO (1) | WO2005109240A1 (en) |
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| US8214200B2 (en) * | 2007-03-14 | 2012-07-03 | Xfrm, Inc. | Fast MDCT (modified discrete cosine transform) approximation of a windowed sinusoid |
| EP2015293A1 (en) * | 2007-06-14 | 2009-01-14 | Deutsche Thomson OHG | Method and apparatus for encoding and decoding an audio signal using adaptively switched temporal resolution in the spectral domain |
| US20090048828A1 (en) * | 2007-08-15 | 2009-02-19 | University Of Washington | Gap interpolation in acoustic signals using coherent demodulation |
| US8126578B2 (en) * | 2007-09-26 | 2012-02-28 | University Of Washington | Clipped-waveform repair in acoustic signals using generalized linear prediction |
| US9436759B2 (en) | 2007-12-27 | 2016-09-06 | Nant Holdings Ip, Llc | Robust information extraction from utterances |
| EP3273442B1 (en) | 2008-03-20 | 2021-10-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for synthesizing a parameterized representation of an audio signal |
| EP2362375A1 (en) * | 2010-02-26 | 2011-08-31 | Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. | Apparatus and method for modifying an audio signal using harmonic locking |
| EP2431970A1 (en) | 2010-09-21 | 2012-03-21 | Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. | Watermark generator, watermark decoder, method for providing a watermarked signal based on discrete valued data and method for providing discrete valued data in dependence on a watermarked signal |
| FR2977439A1 (en) * | 2011-06-28 | 2013-01-04 | France Telecom | WINDOW WINDOWS IN ENCODING / DECODING BY TRANSFORMATION WITH RECOVERY, OPTIMIZED IN DELAY. |
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| EP2830064A1 (en) | 2013-07-22 | 2015-01-28 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for decoding and encoding an audio signal using adaptive spectral tile selection |
| ES2650117T3 (en) | 2013-08-23 | 2018-01-17 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and procedure for processing an audio signal using a combination in an overlapping interval |
| EP2963645A1 (en) * | 2014-07-01 | 2016-01-06 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Calculator and method for determining phase correction data for an audio signal |
| KR102356028B1 (en) | 2015-02-06 | 2022-01-26 | 삼성디스플레이 주식회사 | Display device |
| KR102125410B1 (en) * | 2015-02-26 | 2020-06-22 | 프라운호퍼 게젤샤프트 쭈르 푀르데룽 데어 안겐반텐 포르슝 에. 베. | Apparatus and method for processing audio signal to obtain processed audio signal using target time domain envelope |
| RU2746708C1 (en) * | 2020-07-29 | 2021-04-19 | Закрытое акционерное общество "Перспективный мониторинг" | Method and device for introducing watermark into audio signal |
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2004
- 2004-04-30 DE DE102004021403A patent/DE102004021403A1/en not_active Withdrawn
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2005
- 2005-03-22 EP EP05735002A patent/EP1741039B1/en active Active
- 2005-03-22 AT AT05735002T patent/ATE458225T1/en not_active IP Right Cessation
- 2005-03-22 BR BRPI0509818-1A patent/BRPI0509818B1/en active IP Right Grant
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- 2005-03-22 KR KR1020067021826A patent/KR100851424B1/en active IP Right Grant
- 2005-03-22 WO PCT/EP2005/003064 patent/WO2005109240A1/en active Application Filing
- 2005-03-22 DE DE502005009035T patent/DE502005009035D1/en active Active
- 2005-03-22 CA CA2564970A patent/CA2564970C/en active Active
- 2005-03-22 AU AU2005241157A patent/AU2005241157B8/en active Active
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- 2006-10-26 US US11/553,376 patent/US7574313B2/en active Active
- 2006-11-24 NO NO20065423A patent/NO337309B1/en unknown
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2007
- 2007-05-07 HK HK07104845.2A patent/HK1097326A1/en unknown
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| JP2007535849A (en) | 2007-12-06 |
| BRPI0509818B1 (en) | 2022-06-07 |
| KR20070015174A (en) | 2007-02-01 |
| HK1097326A1 (en) | 2007-06-22 |
| CN1950815A (en) | 2007-04-18 |
| US20070100610A1 (en) | 2007-05-03 |
| EP1741039B1 (en) | 2010-02-17 |
| IL178671A (en) | 2011-03-31 |
| RU2006142324A (en) | 2008-06-10 |
| NO20065423L (en) | 2007-01-26 |
| AU2005241157A1 (en) | 2005-11-17 |
| JP4473913B2 (en) | 2010-06-02 |
| RU2351006C2 (en) | 2009-03-27 |
| NO337309B1 (en) | 2016-03-07 |
| KR100851424B1 (en) | 2008-08-11 |
| AU2005241157B2 (en) | 2008-05-22 |
| AU2005241157B8 (en) | 2008-11-06 |
| CA2564970C (en) | 2012-02-07 |
| BRPI0509818A (en) | 2007-09-18 |
| DE502005009035D1 (en) | 2010-04-01 |
| ATE458225T1 (en) | 2010-03-15 |
| MXPA06012424A (en) | 2007-01-17 |
| IL178671A0 (en) | 2007-02-11 |
| US7574313B2 (en) | 2009-08-11 |
| DE102004021403A1 (en) | 2005-11-24 |
| EP1741039A1 (en) | 2007-01-10 |
| WO2005109240A1 (en) | 2005-11-17 |
| CN100583085C (en) | 2010-01-20 |
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