EP2599079A2 - Systèmes, procédés, appareil et supports pouvant être lus par un ordinateur destinés à un codage à mode dépendant de signaux audio - Google Patents
Systèmes, procédés, appareil et supports pouvant être lus par un ordinateur destinés à un codage à mode dépendant de signaux audioInfo
- Publication number
- EP2599079A2 EP2599079A2 EP11745635.0A EP11745635A EP2599079A2 EP 2599079 A2 EP2599079 A2 EP 2599079A2 EP 11745635 A EP11745635 A EP 11745635A EP 2599079 A2 EP2599079 A2 EP 2599079A2
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- EP
- European Patent Office
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/90—Pitch determination of speech signals
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
- G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
- G10L19/093—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters using sinusoidal excitation models
Definitions
- FIG. 8E shows a block diagram of an implementation A130 of apparatus A120.
- the locations of regions of significant energy in the frequency domain at a given time may be relatively persistent over time. It may be desirable to perform efficient transform-domain coding of an audio signal by exploiting such a correlation over time.
- a scheme as described herein for coding a set of transform coefficients that represent an audio-frequency range of a signal exploits time-persistence of energy distribution across the signal spectrum by encoding the locations of regions of significant energy in the frequency domain relative to locations of such regions in an earlier frame of the signal as decoded.
- VQ coding scheme e.g., GSVQ
- GSVQ VQ coding scheme
- method MB 110 is arranged to encode regions of significant energy in a frequency range of an UB-MDCT spectrum.
- FIG. 14B shows a block diagram of an implementation of the path of FIG. 14A in which transform module MM1 is implemented using an MDCT transform module.
- Modified DCT module MM 10 performs an MDCT operation on each audio frame to produce a set of MDCT domain coefficients.
- FIG. 16 shows front, rear, and side views of a handset H100 (e.g., a smartphone) having two voice microphones MVlO-1 and MV10-3 arranged on the front face, a voice microphone MV10-2 arranged on the rear face, an error microphone ME 10 located in a top corner of the front face, and a noise reference microphone MR 10 located on the back face.
- a loudspeaker LS10 is arranged in the top center of the front face near error microphone ME10, and two other loudspeakers LS20L, LS20R are also provided (e.g., for speakerphone applications).
- a maximum distance between the microphones of such a handset is typically about ten or twelve centimeters.
- Important design requirements for implementation of a configuration as disclosed herein may include minimizing processing delay and/or computational complexity (typically measured in millions of instructions per second or MIPS), especially for computation-intensive applications, such as playback of compressed audio or audiovisual information (e.g., a file or stream encoded according to a compression format, such as one of the examples identified herein) or applications for wideband communications (e.g., voice communications at sampling rates higher than eight kilohertz, such as 12, 16, 44.1, 48, or 192 kHz).
- MIPS processing delay and/or computational complexity
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
Un système destiné à coder un ensemble de coefficients de transformation qui représentent une plage de fréquences audio d'un signal utilise des informations en provenance d'une trame de référence qui décrit une trame précédente du signal de façon à déterminer dans le domaine fréquentiel des emplacements de régions qui présentent une énergie importante dans une trame cible du signal.
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US36966210P | 2010-07-30 | 2010-07-30 | |
| US36970510P | 2010-07-31 | 2010-07-31 | |
| US36975110P | 2010-08-01 | 2010-08-01 | |
| US37456510P | 2010-08-17 | 2010-08-17 | |
| US201061384237P | 2010-09-17 | 2010-09-17 | |
| US201161470438P | 2011-03-31 | 2011-03-31 | |
| US13/193,542 US20120029926A1 (en) | 2010-07-30 | 2011-07-28 | Systems, methods, apparatus, and computer-readable media for dependent-mode coding of audio signals |
| PCT/US2011/045865 WO2012016128A2 (fr) | 2010-07-30 | 2011-07-29 | Systèmes, procédés, appareil et supports pouvant être lus par un ordinateur destinés à un codage à mode dépendant de signaux audio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2599079A2 true EP2599079A2 (fr) | 2013-06-05 |
Family
ID=48173935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11745635.0A Withdrawn EP2599079A2 (fr) | 2010-07-30 | 2011-07-29 | Systèmes, procédés, appareil et supports pouvant être lus par un ordinateur destinés à un codage à mode dépendant de signaux audio |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP2599079A2 (fr) |
-
2011
- 2011-07-29 EP EP11745635.0A patent/EP2599079A2/fr not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2012016128A2 * |
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