WO2011077041A2 - Procede d'optimisation de la reception stereo pour radio analogique et recepteur de radio analogique associe - Google Patents
Procede d'optimisation de la reception stereo pour radio analogique et recepteur de radio analogique associe Download PDFInfo
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- WO2011077041A2 WO2011077041A2 PCT/FR2010/052865 FR2010052865W WO2011077041A2 WO 2011077041 A2 WO2011077041 A2 WO 2011077041A2 FR 2010052865 W FR2010052865 W FR 2010052865W WO 2011077041 A2 WO2011077041 A2 WO 2011077041A2
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- decorrelation
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000005236 sound signal Effects 0.000 claims abstract description 16
- 230000003111 delayed effect Effects 0.000 claims description 14
- 230000006870 function Effects 0.000 claims description 9
- 230000008447 perception Effects 0.000 claims description 5
- 230000001934 delay Effects 0.000 claims description 4
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 230000000875 corresponding effect Effects 0.000 description 14
- 230000002596 correlated effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000003190 augmentative effect Effects 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
- H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
- H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
- H04H40/54—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving generating subcarriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
- H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
- H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
- H04H40/63—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving for separation improvements or adjustments
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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
- G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
- H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
- H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
- H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
- H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
- H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
- H04H40/81—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving for stereo-monaural switching
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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
- G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
Definitions
- the invention relates to a method of optimizing the stereo reception for analogue radio as well as the associated analog radio receiver.
- the invention finds a particularly advantageous application in the field of analog radio but could also be used in any other type of application where it could be useful to transform two strongly correlated audio signals into a stereo type signal.
- an analog radio comprises a tuner adapted to select a channel from a set of frequency channels and to demodulate a first and a second signal contained in the channel.
- the first signal G + D (called the mono component) corresponds to the sum of the signal of its left and the signal of its right of the stereo
- the second signal GD (called the stereo component) corresponds to the subtraction of the signal of his right to the signal from his left.
- the first and the second signal corresponds to obtain the stereo signal composed by the signal of his right and the signal of his left to broadcast.
- the invention aims to allow a stereo broadcast of the received signal despite poor reception of the radio.
- a decorrelation module will decorrelate the signals of its right and left received according to a coefficient "alpha" of reception quality. radio receiver.
- the decorrelation rate of the decorrelation module is modified as a function of the "alpha" coefficient of radio reception quality, in order to restore the stereo effect of the received signal.
- the invention therefore relates to a method for optimizing the audio reproduction in an analog radio, characterized in that it comprises the following steps:
- one selects a given radio channel from among a set of frequency channels
- the signals of this channel are demodulated to obtain a signal of its right and a signal of its left demodulated
- the signal of its right and the signal of its demodulated left are decorrelated with the aid of a decorrelation module, so as to obtain signals decorrelated with respect to each other corresponding to the signal of its optimized right and at the signal of its optimized left, this decorrelation module having a variable decorrelation rate,
- the decorrelation rate of the decorrelation module is modified as a function of this "alpha" coefficient, so that the "alpha" reception quality coefficient is smaller, more the decorrelation rate applied by the decorrelation module is important, and the higher the reception quality rate "alpha", the lower the decorrelation rate applied by the decorrelation module is important.
- the decorrelation module is formed by two elementary blocks at the input of which the signal of its right and the signal of its demodulated left are applied, the output signal of these blocks corresponding respectively to the electrical signal of its optimized right and to the electrical signal of his left optimized, the output signal of each block being the combination of the input signal of the block weighted by a first gain, and the combination of the output signal of the weighted block by a second gain and input signals of the delayed block by a delay line.
- the gain and delay parameters of the elementary blocks are modified.
- the decorrelation rate of the decorrelation module is modified by selecting the parameters corresponding to the reception quality coefficient "alpha".
- g 2 being respectively the values of the first gain and the second gain of the first block
- D1 being the value of the number of delay samples introduced by the delay line
- s 2 (n) e 2 (n). g3 + s 2 (n-D2) .g 4 + e 2 (n-D2),
- g 3 , g 4 being respectively the values of the first gain and the second gain of the second block, - D2 being the value of the number of delay samples introduced by the delay line.
- the first gain and the second gain have opposite values with respect to each other.
- the gains of the first block and the gains of the second block have opposite values from each other, the value of the first gain of the first block being opposite to the value of the first gain of the second block; while the value of the second gain of the first block is opposite to the value of the second gain of the second block.
- the first gain of the first block and the second gain of the second block have a value g; while the second gain of the first block and the first gain of the second block have a value -g.
- the delays introduced by the delay line of the first elementary block and the delay line of the second elementary block are equal.
- the demodulated right and left signals are first filtered using high pass filters and only the high frequency portion of these signals is input to the decorrelation module.
- the low frequency part thus filtered is delayed by a third delay
- the output signals of each elementary block are filtered (in gain and phase) by means of parametric filtering cells to modify the sound perception of these output signals.
- the output signals of each elementary block are filtered (in gain and phase) by means of parametric filtering cells to modify the sound perception of these output signals.
- the higher frequency part of the optimized sound signal is isolated by means of a first band-pass filter
- a nonlinear processor is applied to the insulated part which creates the high frequency harmonics of the isolated signal to obtain a duplicated signal
- a second bandpass filter is applied to the duplicated signal to form a high frequency component
- the high frequency component thus created is combined with the optimized sound signal previously delayed by a delay cell
- an enhanced optimized signal comprising a low frequency component and a recreated high frequency component.
- the upper and lower terminals of the band-pass filter are a function of the "alpha" quality coefficient of reception
- the invention furthermore relates to an optimized analog radio receiver, characterized in that it comprises:
- a tuner able to select a given radio channel from among a set of frequency channels, and to demodulate the signals of this channel to obtain a signal of its right and a signal of its left demodulated
- a decorrelation module capable of generating, from the demodulated signals of its right and of the demodulated left signal, signals decorrelated with respect to each other corresponding to the signals of its optimized right and left, this module of decorrelation having a variable decorrelation rate
- the decorrelation module being able to adapt its decorrelation rate as a function of the measured "alpha” coefficient, so that the smaller the "alpha” reception quality coefficient, the lower the decorrelation rate applied by the decorrelation module; Importantly, and the higher the "alpha” reception quality coefficient, the lower the decorrelation rate applied by the decorrelation module.
- an acute generation module comprising:
- a first band-pass type filter for isolating the part of the highest frequency of the optimized sound signal
- a nonlinear processor which creates the high frequency harmonics applied to the isolated part of the signal to obtain a duplicated signal
- FIG. 1 a schematic representation of a radio according to the invention equipped with a module according to the invention for optimizing the reception of the radio
- FIG. 2 is a schematic representation of an improved embodiment of the invention in which the low frequency part of the right and left signals is not applied at the input of the decorrelation module according to the invention
- Figure 3 a schematic representation of a high frequency component generation module for broadcast stereo sound signals
- FIGS. 4a-4e very schematic representations of the signals observable during use of the high frequency component generation module of FIG. 3.
- Figure 1 shows a radio 1 according to the invention equipped with a standard analog radio receiver 2 comprising a tuner 3 in connection with a decorrelation module 5.
- the tuner 3 is adapted to select a channel Ci from a set of radio frequency channels Ci-C n and to demodulate a first and a second signal contained in the channel.
- the first signal S G + S D corresponds to the sum of the signal of its left SG and the signal of its right S D ; while the second signal corresponds to the signal SQ-S Di, that is to say to the subtraction of the signal from its right S D to the signal of its left S G.
- the first and second signals are then combined in a manner known per se to obtain the stereo signal formed by the signal of its right S D and the signal of its left demodulated SG.
- the tuner 3 comprises a calculation cell 6 making it possible to obtain the alpha quality coefficient of reception.
- variable decorrelation rate of the module 5 is adapted according to the reception quality coefficient "alpha" to restore the stereo effect.
- the more the signals S G and S D are correlated (more "alpha” is small) the higher the degree of decorrelation of the module 5 is important; while the more the signals S G and S D are close to the transmitted signals (more "alpha” is large), the lower the decorrelation rate of the decorrelation module is important.
- the decorrelation rate applied by the decorrelation module 5 is zero.
- the decorrelation module 5 is formed of two elementary blocks 9.1, 9.2 whose input is respectively applied the signal of its right S D and its left S G , the output if, s 2 of these blocks 9.1, 9.2 respectively corresponding to the signal of its optimized right SDO and to the signal of its left optimized S G o- the output signal if, s 2 of each block 9.1, 9.2 is a function of the input signal e- ⁇ , e 2 of the first gain-weighted block g 1 , g 3 and of the combination of the input signals e 2 and the output signal if, s 2 of block weighted by a second gain g 2 , g 4 delayed by a delay line 10.1, 10.2.
- the input signal e- ⁇ , e 2 of block 9.1, 9.2 is connected to an input of a first summer 1 1 .1, 1 1 .2 and applied to an input of a second summator 12.1, 12.2 after being multiplied by the first gain gi, g 3 .
- the output signal if, s 2 of the block is applied to another input of the first adder .1, 1 1.2 after having been multiplied by the second gain g 2 , g 4 , the output signal of the first adder 1 1.1, 1 1.2 being applied as input to the delay line 10.1, 10.2.
- the delay line output signal 10.1, 10.2 is applied to another input of the second summer 1 1 .1, 1 1.2, the output signal of this second summer 1 .1, 1 1.2 corresponding to the output signal s 2 of elementary block 9.1, 9.2 (and thus to the signal of its right and left optimized S D o, SGO in Figure 1).
- s 1 (n) e 1 (n) .g + s 1 (n-D1) .g 2 + e 1 (n-D1)
- gi, g 2 being respectively the values of the first gain and the second gain of the first block 9.1
- D1 being the value of the number of delay samples introduced by the delay line 10.1.
- g 3 , g 4 being respectively the values of the first gain and the second gain of the second block 9.2, D2 being the value of the number of delay samples introduced by the delay line 10.2.
- the first gain gi (respectively g 3 ) and the second gain g 2 (respectively g 4 ) have opposite values. one with respect to the other.
- Each block 9.1, 9.2 then behaves as an all-pass type filter which does not modify the gain of the input signal ei, e 2 but only its phase.
- the gains gi, g 2 of the first block 9.1 and the gains g 3 , g 4 of the second block 9.2 preferably have opposite values of each other.
- the value of the first gain gi of the first block 9.1 is opposite to the value of the first gain g 3 of the second block 9.2; while the value of the second gain g 2 of the first block 9.1 is opposite to the value of the second gain g 4 of the second block 9.2.
- the first 9.1 1 5 and the second 9.2 blocks which have an identical absolute value g.
- the first gain gi of the first block 9.1 and the second gain g 4 of the second block 9.2 have a value g; while the second gain g 2 of the first block 9.1 and the first g 3 gain of the second block 9.2 has a value -g.
- the delays D1, D2 introduced by the delay line 10.1 of the first elementary block 9.1 and the delay line 10.2 of the second elementary block 9.2 are equal and are equal to 76. However, it would be possible to choose delays D1, D2 having different durations.
- the parameters g1, g2, g3, g4, D1, D2 of the elementary blocks 9.1, 9.3 are varied.
- a table 15 stored in memory establishes the correspondence between the parameters of each block 9.1, 9.2 (first gain gi, g 3 and second gain g 2 , g 4 and delay D1, D2 of line 10.1, 10.2) and the "alpha" quality factor of reception, the parameters of each block 0 9.1, 9.2 being selected according to the coefficient "alpha" of reception quality provided by the radio.
- stage 17 composed of high pass filters 18 and low pass filters 19 for separating the low frequency signals of the high frequency signals in the right signals S D and left SG.
- a stage 17 composed of high pass filters 18 and low pass filters 19 for separating the low frequency signals of the high frequency signals in the right signals S D and left SG.
- only the high frequency part of the right signals S D and left SG is applied to the input of the decorrelation module 5.
- the low frequency part of the right signals S D and left SG is applied at the input of a third delay line 23 and the low frequency parts of the right signals S D and left S G thus delayed are summed respectively with the signals obtained at the outputs of the blocks 9.1, 9.2, so as to obtain the optimized right and left signals SDO and SGO-
- the delay D3 of the third line 23 is 176 (with a sampling frequency of 44.1 kHz).
- the equalizing cells 25.1, 25.2 each comprise a filter whose gain and phase can be adjusted according to different frequency bands of the signals si, s 2 and a gain which acts on the set the spectrum of the signals si, s 2 .
- These gain and phase parameters are adapted by sound engineers in particular according to the intended application.
- the invention makes it possible to recreate a high frequency component of the signals of its right S D o or left SGO which has been suppressed in case of poor reception.
- This aspect of the invention is independent of the technical principle of the creation of the stereo in case of poor reception and could be implemented independently of this principle.
- the signals of its left S G o and right S D o which are formed essentially of a lower frequency component SBF lower than the cutoff frequency fc (see Figure 4a), are each inputted.
- This module 35 comprises a first filter 36 into which the bandpass signal to its left S o G (resp. right S DR) is applied .
- This first filter 36 makes it possible to isolate the part of the highest frequency of the input signal S G o (resp S D o) between a lower bound and an upper bound.
- the upper bound is equal to the cut-off frequency fc
- the lower bound is equal to fc / N, N being preferably 2 or 4.
- the isolated portion Si of the signal obtained at the output of the band-pass filter 36 is shown in Figure 4b.
- the isolated part Si is then applied at the input of a non-linear type processor 38 which makes it possible to duplicate the isolated signal Frequency Si by creating the high frequency harmonics at,, f 2 f f n of this signal S, , which makes it possible to fill the frequency spectrum in the high frequency zone.
- the duplicated signal S D 'thus obtained at the output of the nonlinear processor 38 is shown in FIG. 4c.
- the harmonics of the signal S D ' have an amplitude which decreases with the increase of the frequency.
- the high frequency part of the duplicated signal S D '(without the isolated part Si from which it has been obtained) is then isolated in order to obtain a high frequency component S H F sound signal shown in Figure 4d.
- a bandpass filter 39 having a lower bound and an upper bound is used.
- the lower bound is fc while the upper bound is M.fc, M being for example 2 or 4.
- the signal from its left SGO (resp., Right S D o) restored is filtered using a low-pass filter 41 having a cut-off frequency substantially equal to fc to keep only the low frequency component S BF of the restored signal SGR, S D R.
- the low frequency part S BF is then delayed by a delay D4 by means of a delay cell 42.
- This delay I o D4 is of the order of a few samples.
- the low frequency component S B F is summed with the high frequency component S H F using an adder 44, in order to obtain an optimized left augmented sound signal SQOA (respectively SDOA right). formed of the initial low frequency component S B F of the optimized sound signal and the high frequency component S H F thus created by the method according to the invention.
- a post processing unit 45 modifies the shape of the spectral response of the high frequency component SHF, and gains gs and gg are applied to the high frequency components S H F and low frequency S BF before summation 0 by summator 44.
- the parameters of the filters 36, 39, 41 depend on the coefficient "alpha" of reception quality. Indeed, the filters 36, 39, 41 have terminals that depend on the cutoff frequency fc. Since this cut-off frequency fc depends on the "alpha" coefficient, the terminals 5 also depend on the "alpha” coefficient. There therefore exist a table 47 establishing the correspondence between the reception quality coefficient "alpha" and the associated filter parameters making it possible to generate the high frequency component of the left and right signals.
- the parameters of the post processing cell 45, the nonlinear processor 38, the delay cell 42, and the gains g 8 and gg also preferably depend on the reception quality coefficient "alpha".
- the parameters of the high-frequency generation modules 35 which process the signal of its left S G R and the signal of its right S D R are preferably symmetrical, that is to say that the module 35 which processes the signal of its left S G R presents parameters of the same value as the module 35 which processes the signal of its right S DR .
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- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES10808913.7T ES2644441T3 (es) | 2009-12-23 | 2010-12-21 | Procedimiento de optimización de la recepción estéreo para radio analógica y receptor de radio analógica asociado |
KR1020127019501A KR101785747B1 (ko) | 2009-12-23 | 2010-12-21 | 아날로그 라디오를 위한 스테레오 수신을 최적화하는 방법 및 연관된 아날로그 라디오 수신기 |
US13/519,036 US8934635B2 (en) | 2009-12-23 | 2010-12-21 | Method for optimizing the stereo reception for an analog radio set and associated analog radio receiver |
EP10808913.7A EP2517387B1 (fr) | 2009-12-23 | 2010-12-21 | Procédé d'optimisation de la réception stéréo pour radio analogique et récepteur de radio analogique associé |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0959552A FR2954640B1 (fr) | 2009-12-23 | 2009-12-23 | Procede d'optimisation de la reception stereo pour radio analogique et recepteur de radio analogique associe |
FR0959552 | 2009-12-23 |
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WO2011077041A2 true WO2011077041A2 (fr) | 2011-06-30 |
WO2011077041A3 WO2011077041A3 (fr) | 2011-08-25 |
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PCT/FR2010/052865 WO2011077041A2 (fr) | 2009-12-23 | 2010-12-21 | Procede d'optimisation de la reception stereo pour radio analogique et recepteur de radio analogique associe |
Country Status (6)
Country | Link |
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US (1) | US8934635B2 (fr) |
EP (1) | EP2517387B1 (fr) |
KR (1) | KR101785747B1 (fr) |
ES (1) | ES2644441T3 (fr) |
FR (1) | FR2954640B1 (fr) |
WO (1) | WO2011077041A2 (fr) |
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US9508335B2 (en) | 2014-12-05 | 2016-11-29 | Stages Pcs, Llc | Active noise control and customized audio system |
US9654868B2 (en) | 2014-12-05 | 2017-05-16 | Stages Llc | Multi-channel multi-domain source identification and tracking |
US9747367B2 (en) | 2014-12-05 | 2017-08-29 | Stages Llc | Communication system for establishing and providing preferred audio |
US10609475B2 (en) | 2014-12-05 | 2020-03-31 | Stages Llc | Active noise control and customized audio system |
US9980042B1 (en) | 2016-11-18 | 2018-05-22 | Stages Llc | Beamformer direction of arrival and orientation analysis system |
US9980075B1 (en) | 2016-11-18 | 2018-05-22 | Stages Llc | Audio source spatialization relative to orientation sensor and output |
US10945080B2 (en) | 2016-11-18 | 2021-03-09 | Stages Llc | Audio analysis and processing system |
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US4037057A (en) * | 1974-08-01 | 1977-07-19 | Nippon Gakki Seizo Kabushiki Kaisha | Noise-cancelling apparatus for FM stereo receiver |
JP2693893B2 (ja) * | 1992-03-30 | 1997-12-24 | 松下電器産業株式会社 | ステレオ音声符号化方法 |
US7254239B2 (en) * | 2001-02-09 | 2007-08-07 | Thx Ltd. | Sound system and method of sound reproduction |
US20030195745A1 (en) | 2001-04-02 | 2003-10-16 | Zinser, Richard L. | LPC-to-MELP transcoder |
JP3992521B2 (ja) * | 2001-09-26 | 2007-10-17 | 三洋電機株式会社 | 隣接妨害検出装置および方法、ならびにその方法を利用可能な放送受信装置 |
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RU2331933C2 (ru) | 2002-10-11 | 2008-08-20 | Нокиа Корпорейшн | Способы и устройства управляемого источником широкополосного кодирования речи с переменной скоростью в битах |
US7394903B2 (en) * | 2004-01-20 | 2008-07-01 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Apparatus and method for constructing a multi-channel output signal or for generating a downmix signal |
CA2992125C (fr) * | 2004-03-01 | 2018-09-25 | Dolby Laboratories Licensing Corporation | Reconstruction de signaux audio au moyen de techniques de decorrelation multiple et de parametres codes de maniere differentielle |
KR101183859B1 (ko) * | 2004-11-04 | 2012-09-19 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 다중채널 오디오 신호들의 인코딩 및 디코딩 |
JP4512016B2 (ja) * | 2005-09-16 | 2010-07-28 | 日本電信電話株式会社 | ステレオ信号符号化装置、ステレオ信号符号化方法、プログラム及び記録媒体 |
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JP5202090B2 (ja) * | 2008-05-07 | 2013-06-05 | アルパイン株式会社 | サラウンド生成装置 |
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2009
- 2009-12-23 FR FR0959552A patent/FR2954640B1/fr active Active
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2010
- 2010-12-21 ES ES10808913.7T patent/ES2644441T3/es active Active
- 2010-12-21 WO PCT/FR2010/052865 patent/WO2011077041A2/fr active Application Filing
- 2010-12-21 KR KR1020127019501A patent/KR101785747B1/ko active IP Right Grant
- 2010-12-21 US US13/519,036 patent/US8934635B2/en active Active
- 2010-12-21 EP EP10808913.7A patent/EP2517387B1/fr active Active
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FR2954640B1 (fr) | 2012-01-20 |
WO2011077041A3 (fr) | 2011-08-25 |
ES2644441T3 (es) | 2017-11-29 |
FR2954640A1 (fr) | 2011-06-24 |
EP2517387B1 (fr) | 2017-07-26 |
KR101785747B1 (ko) | 2017-10-16 |
US20120288098A1 (en) | 2012-11-15 |
EP2517387A2 (fr) | 2012-10-31 |
KR20120123369A (ko) | 2012-11-08 |
US8934635B2 (en) | 2015-01-13 |
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