WO2009131066A1 - 信号分析制御及び信号制御のシステム、装置、方法及びプログラム - Google Patents
信号分析制御及び信号制御のシステム、装置、方法及びプログラム Download PDFInfo
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- G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
Definitions
- the present invention relates to a signal analysis control and signal control system, apparatus, method, and program.
- a noise suppression system (hereinafter referred to as a noise suppressor) is known as a system that suppresses background noise of an input signal in which a plurality of sound sources are composed of desired speech and background noise.
- the noise suppressor is a system that suppresses noise (noise) superimposed on a desired audio signal.
- noise suppressor estimates a power spectrum of a noise component using an input signal converted into a frequency domain, and subtracts the estimated power spectrum of the noise component from the input signal. Thereby, the noise mixed in a desired audio
- these noise suppressors are also applied to non-stationary noise suppression by continuously estimating the power spectrum of the noise component.
- the noise suppressor of the first related technology functions as a pre-processing of an encoder when used for communication.
- the output of the noise suppressor is encoded and transmitted through the communication path.
- the signal is decoded to generate an audible signal.
- the noise suppressor of the first related technology is a one-input noise suppression system, and generally, there is a trade-off relationship between residual noise that remains without being suppressed and distortion of the output enhanced speech. Reducing residual noise increases distortion, and reducing distortion increases residual noise.
- the optimum state of the balance between residual noise and distortion varies depending on each user. However, in a configuration in which the noise suppressor is in front of the encoder, that is, in the transmission unit, the user cannot adjust the balance between residual noise and distortion to suit his / her preference.
- Non-Patent Document 1 a reception-side noise suppressor shown in FIG. 40 disclosed in Non-Patent Document 1 is known.
- the configuration of the second related technology includes a noise suppression unit 9501 in the reception unit, not in the transmission unit.
- the noise suppression unit 9501 performs noise suppression processing on the signal input from the decoder. Therefore, the user can adjust the balance between residual noise and distortion so as to suit his / her preference.
- JP 2002-204175 A January 2007, IEE International Conference on Consumer Electronics, 6.1-4, No. 2 (IEEE INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS, 6.1-4, JAN, 2007)
- the first related technology described above has a problem that the user cannot adjust the balance between residual noise and distortion to suit his / her preference.
- the second related technique described above As a means for solving this problem, there is the second related technique described above.
- the second related technology there is a problem that the amount of calculation of the receiving unit increases because the receiving unit performs the noise suppression processing performed by the transmitting unit in the first related technology. Furthermore, in the second related technology, when the receiver has an important function other than the noise suppressor, the noise suppressor function cannot be incorporated, or another function cannot be incorporated by incorporating the noise suppressor function. There is. This is because there is generally a restriction on the total calculation amount of the receiving unit. In addition, the amount of computation of the receiving unit (or the playback unit) is large, which causes a drop in convenience due to limitations on sound quality and receiver functions. Furthermore, the configurations of the first related technology and the second related technology are also intended to separate speech and background noise, and there is a problem that they cannot be applied to general signal separation.
- the present invention has been invented in view of the above problems, and its purpose is to be able to configure a receiving unit with a small amount of computation, and independently for each element that constitutes an input signal for all types of input signals. It is to provide a signal analysis control system that can be controlled.
- the present invention for solving the above problems includes a first signal, a second signal including a plurality of constituent elements, constituent element information representing a relationship between the constituent elements, the constituent elements, and the second signal.
- Signal control comprising: analyzing control information including information representing a relationship between the first signal and the second signal based on the component information and the analysis control information Is the method.
- the present invention for solving the above-described problems is characterized by receiving the first signal, the second signal including a plurality of components, and the analysis control information including information indicating the relationship between the second signal and the first signal.
- the signal analysis method is characterized in that, based on one signal, the second signal, and the analysis control information, component information representing a relationship between the components is generated.
- the present invention for solving the above-described problems is characterized by receiving the first signal, the second signal including a plurality of components, and the analysis control information including information indicating the relationship between the second signal and the first signal. Based on one signal, the second signal, and the analysis control information, component information representing a relationship between the components is generated, and based on the component information and the analysis control information, the first information is generated.
- a signal analysis control method characterized by controlling one signal or the second signal.
- the present invention for solving the above problems includes a first signal, a second signal including a plurality of constituent elements, constituent element information representing a relationship between the constituent elements, the constituent elements, and the second signal. And a signal control unit that controls the first signal or the second signal based on the component information and the analysis control information. This is a featured signal control apparatus.
- the present invention for solving the above-described problems is characterized by receiving the first signal, the second signal including a plurality of components, and the analysis control information including information indicating the relationship between the second signal and the first signal.
- a signal analysis apparatus comprising: a component information generation unit that generates component information representing a relationship between the components based on one signal, the second signal, and the analysis control information. .
- the present invention for solving the above-described problems is characterized by receiving the first signal, the second signal including a plurality of components, and the analysis control information including information indicating the relationship between the second signal and the first signal.
- a component information generating unit that generates component information representing a relationship between the components based on one signal, the second signal, and the analysis control information; the component information and the analysis control information;
- a signal control unit that controls the first signal or the second signal based on the signal analysis control system.
- the present invention for solving the above-described problems is directed to a computer, a first signal, a second signal including a plurality of components, component information representing a relationship between the components, the components, and the second Signal control for controlling the first signal or the second signal on the basis of the processing to receive the analysis control information including information representing the relationship with the signal, and the component element information and the analysis control information
- a signal control program characterized in that processing is executed.
- the present invention for solving the above problems receives a first signal, a second signal including a plurality of components, and analysis control information including information indicating a relationship between the second signal and the computer. And a component information generation process for generating component information representing a relationship between the components based on the first signal, the second signal, and the analysis control information. Is a signal analysis program.
- the present invention for solving the above problems receives a first signal, a second signal including a plurality of components, and analysis control information including information indicating a relationship between the second signal and the computer.
- a component information generation process for generating component information representing a relationship between the components based on the processing, the first signal, the second signal, and the analysis control information; and the component information
- a signal analysis control program for executing a signal control process for controlling the first signal or the second signal based on the analysis control information.
- the amount of calculation related to the signal analysis in the reception unit can be reduced.
- FIG. 2 is a first configuration example of an encoding unit 100.
- FIG. 3 is a second configuration example of the encoding unit 100.
- FIG. 4 is a third configuration example of the encoding unit 100.
- FIG. 3 is a configuration example of a decoding unit 150.
- FIG. 3 is a configuration example of a signal analysis unit 101.
- 3 is a configuration example of a signal control unit 151.
- 2 is a first configuration example of an analysis information calculation unit 121.
- FIG. 2 is a first configuration example of a signal processing unit 172.
- FIG. 3 shows a second configuration example of the signal processing unit 172.
- FIG. 10 is a third configuration example of the signal processing unit 172.
- FIG. 10 is a third configuration example of the signal processing unit 172.
- FIG. 10 is a fourth configuration example of the signal processing unit 172.
- FIG. 5 shows a second configuration example of the analysis information calculation unit 121.
- FIG. 10 is a fifth configuration example of the signal processing unit 172.
- FIG. 10 is a sixth configuration example of the signal processing unit 172.
- FIG. 11 is a seventh configuration example of the signal processing unit 172.
- FIG. 10 is a third configuration example of the analysis information calculation unit 121.
- FIG. 11 is an eighth configuration example of the signal processing unit 172.
- FIG. FIG. 10 is a fourth configuration example of the analysis information calculation unit 121.
- FIG. 10 is a ninth configuration example of the signal processing unit 172.
- FIG. FIG. 10 is a fifth configuration example of the analysis information calculation unit 121.
- FIG. 10 is a fifth configuration example of the analysis information calculation unit 121.
- FIG. 10 is a fifth configuration example of the analysis information calculation unit 121.
- FIG. 10 is a fifth configuration example of the analysis information calculation unit 121
- FIG. 12 is a tenth configuration example of the signal processing unit 172.
- FIG. 11 shows an eleventh configuration example of the signal processing unit 172.
- FIG. This is a twelfth configuration example of the signal processing unit 172.
- This is a thirteenth configuration example of the signal processing unit 172.
- FIG. 10 is a sixth configuration example of the analysis information calculation unit 121.
- FIG. This is a fourteenth configuration example of the signal processing unit 172.
- FIG. This is a fifteenth configuration example of the signal processing unit 172.
- FIG. FIG. 10 is a seventh configuration example of the analysis information calculation unit 121.
- FIG. This is a seventeenth configuration example of the signal processing unit 172.
- FIG. 18 is an eighth configuration example of the analysis information calculation unit 121.
- FIG. This is an eighteenth configuration example of the signal processing unit 172. It is a block diagram which shows the 9th embodiment of this invention. It is a block diagram which shows the 10th Embodiment of this invention. It is a figure which shows the relationship of the magnification of the coefficient correction
- Transmitter 15 Receiver 100 Encoder 101 Signal analyzer 102 Multiplexer 110, 111, 114, 120, 121, 171 Converter 112, 115 Quantizer 113, 116 Downmix section 122 Analysis information calculator 150 Decryption unit 151 Output signal generator 152 Separation part 160 Inverse quantization section 161, 173 Inverse transform unit 172 Signal controller 200 Inter-signal information calculator 201, 202, 206, 207, 209, 210, 212, 213 Suppression coefficient calculator 203, 307 Gain reverse converter 204, 208, 211, 214, 220, 221, 222, 223 Analysis information coding part 205 switch 300, 312, 316, 317, 320, 321, 322, 323 Analysis information decoder 301, 304 Rendering control information separator 302, 303 Rendering part 305, 313 Gain correction section 306 Gain converter 308, 309, 314 Sub-gain correction unit 310, 315 Sub-gain lower limit correction section 311 Sub-gain lower limit estimator 1300
- the signal analysis control system of the present invention has a configuration in which a transmission unit 10 and a reception unit 15 are connected via a transmission path.
- the transmission unit 10 receives a plurality of input signals composed of a plurality of sound sources and outputs a transmission signal.
- the transmission signal is input to the receiving unit 15 via the transmission path.
- the receiving unit 15 receives a transmission signal and outputs a plurality of or one output signal.
- the transmission unit, the transmission path, and the reception unit may be a recording unit, a storage medium, and a reproduction unit, respectively.
- the number of input signals will be described as two of the first and second input signals.
- the transmission unit 10 includes an encoding unit 100, a signal analysis unit 101, and a multiplexing unit 102.
- the plurality of input signals, the first and second input signals are input to the encoding unit 100 and the signal analysis unit 101.
- At least one input signal of each input signal includes a plurality of components.
- the signal analysis unit 101 receives the first and second input signals and the analysis control information. Then, the signal analysis unit 101 analyzes each input signal based on the analysis control information, and calculates component information regarding the components that constitute the input signal.
- the signal analysis unit 101 outputs analysis encoded information obtained by encoding the component element information and the analysis control information.
- the analysis control information includes information indicating the relationship between each component and the input signal.
- the information indicating the relationship between the component and the input signal may include dependency relationship information indicating from which input signal the component is generated.
- the analysis control information includes information regarding the classification of each component.
- the information regarding the classification may include classification of the target sound and background sound, classification of voice and music, classification for each instrument included in the music, and the like.
- the component element information may include, for example, an energy ratio, phase difference, coherence, etc. between the components included in the input signal.
- the signal analysis unit 101 outputs the analysis coding information to the multiplexing unit 102.
- Encoding section 100 encodes each of a plurality of input signals.
- Encoding section 100 outputs signal encoding information for each input signal to multiplexing section 102.
- the multiplexing unit 102 multiplexes the signal encoding information input from the encoding unit 100 and the analysis encoding information input from the signal analysis unit 101.
- Multiplexing section 102 outputs the multiplexed signal as a transmission signal to the transmission line.
- the receiving unit 15 includes a decoding unit 150, an output signal generation unit 151, and a separation unit 152.
- the transmission signal is input to the separation unit 152.
- Separating section 152 separates the transmission signal into signal encoded information and analysis encoded information.
- the separation unit 152 outputs the signal coding information to the decoding unit 150 and the analysis coding information to the output signal generation unit 151, respectively.
- the decoding unit 150 decodes the signal encoding information and generates a decoded signal.
- Decoding section 150 then outputs the decoded signal to output signal generation section 151.
- the output signal generation unit 151 operates the decoded signal received from the decoding unit 150 for each component based on the analysis coding information and the reproduction control information received from the separation unit 152.
- the output signal generation unit 151 outputs the operated signal as an output signal.
- the output signal generation unit 151 may be operated in units of a component group composed of a plurality of components instead of the components.
- the component included in the input signal may be a sound source.
- the signal control unit 151 operates for each sound source corresponding to the component.
- the reproduction control information may include signal control information or rendering information.
- the signal control information is information for controlling each component of the input signal for each frequency component. That is, the signal control information is information for controlling the relationship between the constituent elements. For example, when the constituent elements are the target sound and the background sound, the signal control information is information for changing the energy level of the target sound and the background sound.
- the signal control information may be input from the outside by the user. For example, as signal control information input from the outside, personal information such as user preferences registered in advance in the receiving unit, operating state of the receiving unit (including external environment information such as a speaker being turned off) , The type and type of the receiver, the use state and remaining amount of the power supply and battery, and the type and state of the antenna (shape such as folded, orientation, etc.).
- the signal control information may be automatically acquired in another format.
- the signal control information may be automatically acquired via a sensor installed in or near the receiving unit. For example, the amount of external noise, brightness, time zone, geographical position, temperature, synchronization information with video, bar code information through a camera, etc. may be used as signal control information acquired automatically.
- the rendering information is information for outputting a plurality of components included in the input signal to a plurality of output channels, respectively. That is, the rendering information is information that represents the relationship between the component and the output signal for each frequency component.
- the rendering information may include localization information of each component mixed in the decoded signal.
- the rendering information may include information for operating the sense of localization by blurring the sound image.
- the output signal to each output channel can be controlled for each component.
- Each component may be output from one specific output channel (for example, a speaker), or may be distributed and output to a plurality of output channels. For example, if the component is the target sound and the background sound, the target sound is output from only a specific output channel, and the background sound is output from the other output channels, so that the target sound is clearly localized and the environmental sound is output. The presence can be improved.
- the encoding unit 100 receives a plurality of input signals, first and second input signals, and outputs signal encoding information.
- the encoding unit 100 includes conversion units 110 and 111 and a quantization unit 112.
- the first input signal is input to the conversion unit 110.
- the second input signal is input to the conversion unit 111.
- the converter 110 decomposes the first input signal into frequency components and generates a first converted signal.
- the conversion unit 110 outputs the first conversion signal to the quantization unit 112.
- the conversion unit 111 decomposes the second input signal into frequency components and generates a second converted signal.
- the conversion unit 111 outputs the second conversion signal to the quantization unit 112.
- the quantization unit 112 quantizes the first converted signal and the second converted signal, and outputs the result as signal encoding information.
- the conversion units 110 and 111 combine a plurality of input signal samples to form one block, and apply frequency conversion to this block.
- frequency conversion examples include Fourier transform, cosine transform, KL (Kalunen label) transform, and the like are known.
- Non-Patent Document 2 (1990, "Digital Coding of Waveforms", Prentice Hall (DIGITAL CODING OF OF WAVEFORMS, PRINCIPLES AND AND APPLICATIONS) TO SPEECH AND VIDEO, PRENTICE-HALL, 1990.)).
- the conversion units 110 and 111 can also apply the above-described conversion to the result of weighting one block of input signal samples with a window function.
- window functions such as Hamming, Hanning (Han), Kaiser, and Blackman are known. A more complicated window function can also be used. Techniques related to these window functions are described in Non-Patent Document 3 (1975, “Digital Signal Processing”, Prentice Hall (DIGITAL SIGNAL PROCESSING, PRENTICE-HALL, 1975)) and Non-Patent Document 4 (1993). "Multirate Systems and Filterbanks", Plentice Hall (MULTIRATE SYSTEMS AND FILTER BANKS, PRENTICE-HALL, 1993)).
- each block may be allowed to overlap. For example, when an overlap of 30% of the block length is applied, the last 30% of the signal samples belonging to one block are used by multiple blocks as the first 30% of the signal samples belonging to the next block.
- Non-patent document 2 discloses a technique related to blocking and conversion having overlap.
- the conversion units 110 and 111 may be configured by a band division filter bank.
- the band division filter bank is composed of a plurality of band pass filters.
- the band division filter bank divides the received input signal into a plurality of frequency bands and outputs the result to the quantization unit 112.
- Each frequency band of the band division filter bank may be equally spaced or unequal.
- the time resolution can be reduced by dividing the band into a narrow band in the low band and the time resolution can be increased by dividing the band into a wide band in the high band.
- Typical examples of unequal interval division include octave division in which the band is successively halved toward the low band and critical band division corresponding to human auditory characteristics.
- a technique related to the band division filter bank and its design method is disclosed in Non-Patent Document 4.
- the quantization unit 112 removes redundancy of the input signal and outputs an encoded signal.
- control is performed so that the correlation of input signals is minimized.
- signal components that are not perceptually perceived may be removed by using auditory characteristics such as a masking effect.
- a quantization method such as linear quantization or nonlinear quantization is known. Redundancy can be further removed from the quantized signal using Huffman coding or the like.
- the encoding unit 100 receives a plurality of input signals, first and second input signals, and outputs signal encoding information.
- the encoding unit 100 includes a downmix unit 113, a conversion unit 114, and a quantization unit 115.
- the first input signal and the second input signal are input to the downmix unit 113.
- the downmix unit 113 generates a downmix signal from the first input signal and the second input signal, and outputs the downmix signal to the conversion unit 114.
- the conversion unit 114 decomposes the downmix signal into frequency components and generates a downmix conversion signal.
- the conversion unit 114 outputs the downmix conversion signal to the quantization unit 115.
- the quantization unit 115 quantizes the downmix conversion signal and outputs it as signal coding information. Since the conversion unit 114 can use the same processing as the conversion units 110 and 111, description thereof is omitted. Further, since the quantization unit 115 can use the same processing as the quantization unit 112, description thereof is omitted.
- the first input signal and the second input signal may be added, or the phase difference between the first input signal and the second input signal is compensated. You may add after.
- the second configuration example can reduce the amount of processing related to the conversion unit compared to the first configuration example.
- the signal to be quantized becomes a downmixed signal, and the amount of signal encoded information can be reduced as compared with the first configuration example.
- the encoding unit 100 receives a plurality of input signals, first and second input signals, and outputs signal encoding information.
- the encoding unit 100 includes conversion units 110 and 111, a downmix unit 116, and a quantization unit 115.
- the first input signal is input to the conversion unit 110.
- the second input signal is input to the conversion unit 111.
- the converter 110 decomposes the first input signal into frequency components and generates a first converted signal.
- the converter 110 outputs the first converted signal to the downmix unit 116.
- the conversion unit 111 decomposes the second input signal into frequency components and generates a second converted signal.
- the converter 111 outputs the second converted signal to the downmix unit 116.
- the downmix unit 116 calculates a downmix conversion signal from the first conversion signal and the second conversion signal, and outputs the downmix conversion signal to the quantization unit 115. Then, the quantization unit 115 quantizes the downmix conversion signal and outputs it as signal coding information.
- the first conversion signal and the second conversion signal may be added for each frequency, or different energy correction or phase difference compensation for each frequency may be added to the first conversion. You may add, after giving to a signal and a 2nd conversion signal. Since the third configuration example performs the downmix process in the frequency domain, a detailed downmix process can be realized as compared with the second configuration example. Similarly to the second configuration example, in the third configuration example, the signal to be quantized is a downmixed signal, and the amount of signal encoded information can be reduced as compared with the first configuration example. I can do it.
- Decoding section 150 receives the signal encoding information and outputs a decoded signal.
- the decoding unit 150 includes an inverse quantization unit 160 and an inverse transform unit 161.
- the inverse quantization unit 160 inversely quantizes the received signal encoding information of each frequency, and generates a plurality of or one decoded transform signal composed of a plurality of frequency components. Then, the inverse quantization unit 160 outputs the decoded transform signal to the inverse transform unit 161.
- the inverse transform unit 161 inversely transforms the decoded converted signal to generate a decoded signal. Then, the inverse transform unit 161 outputs the decoded signal.
- the decoded signal is a signal in which the first input signal and the second input signal are multiplexed. In the case of the second configuration example shown in FIG. 3 or the third configuration example shown in FIG.
- the inverse transform applied by the inverse transform unit 161 it is desirable to select an inverse transform corresponding to the transform applied by the transform unit 110. For example, when the transform unit 110 collects a plurality of input signal samples to form one block and applies frequency transform to this block, the inverse transform unit 161 performs corresponding inverse transform on the same number of samples. Apply. In addition, when the converting unit 110 configures one block from a plurality of input signal samples, if the blocks allow overlapping (overlap), the inverse converting unit 161 corresponds to this after the inverse conversion. Apply the same overlap to the signal. Further, when the converting unit 110 is configured by a band division filter bank, the inverse converting unit 161 is configured by a band synthesis filter bank. A technique related to the band synthesis filter bank and its design method is disclosed in Non-Patent Document 4.
- Non-Patent Document 2 March 1985, IEE International Conference on Acoustic Speech and Signal Processing, 25.1.1, ( IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, 25.1.1, MAR, 1985, pp.937-940) (pp.937-940).
- the encoding unit 100 outputs the input signal as it is to the multiplexing unit 102 without performing the encoding process
- the decoding unit 150 outputs the decoded signal as it is to the signal control unit 151 without performing the decoding process. Also good. With this configuration, it is possible to eliminate signal distortion associated with encoding / decoding processing. Further, the encoder 100 and the decoder 150 may be configured to perform distortion-free compression / decompression processing. With this configuration, the output signal generation unit 151 can receive a decoded signal without causing distortion in the input signal.
- the signal analysis unit 101 receives a plurality of input signals, first and second input signals, and outputs analysis coding information.
- the signal analysis unit 101 includes conversion units 120 and 121 and an analysis information calculation unit 122.
- the first input signal is input to the conversion unit 120.
- the second input signal is input to the conversion unit 121.
- the converter 120 decomposes the received first input signal into frequency components and generates a first converted signal.
- the conversion unit 120 outputs the first conversion signal to the analysis information calculation unit 122.
- the conversion unit 121 decomposes the received second input signal into frequency components and generates a second converted signal.
- the conversion unit 121 outputs the second conversion signal to the analysis information calculation unit 122.
- the analysis information calculation unit 122 breaks down the first conversion signal and the second conversion signal into components based on the analysis control information, and calculates component information regarding the components constituting each conversion signal.
- the analysis control information includes information indicating the relationship between each component and the input signal.
- the information indicating the relationship between the component and the input signal may include dependency relationship information indicating from which input signal the component is generated.
- the analysis control information includes information regarding the classification of each component.
- the information regarding the classification may include classification of the target sound and background sound, classification of voice and music, classification for each instrument included in the music, and the like. Then, the analysis information calculation unit 122 encodes the component element information and the analysis control information to calculate analysis encoding information, and outputs the analysis encoding information.
- the analysis information calculation unit 122 may calculate the component information by decomposing the first and second converted signals into component groups each including a plurality of components.
- the conversion method in the conversion units 120 and 121 the conversion method in the conversion units 110 and 111 may be used.
- the output signal generation unit 151 receives the decoded signal and the analysis coding information, and outputs an output signal.
- the output signal generation unit 151 includes a conversion unit 171, a signal control unit 172, and an inverse conversion unit 173.
- the conversion unit 171 decomposes the received decoded signal into frequency components, and generates a decoded converted signal.
- the conversion unit 171 outputs the decoded conversion signal to the signal control unit 172.
- the signal control unit 172 controls each component corresponding to the sound source constituting the decoded converted signal based on the analysis coding information and the reproduction control information, changes the relationship between the plurality of components, and outputs the converted signal Is generated.
- the signal control unit 172 outputs the output conversion signal to the inverse conversion unit 173. Further, the signal control unit 172 may be decomposed into a component group composed of a plurality of components and change the relationship between the plurality of components.
- the inverse conversion unit 173 performs inverse conversion on the output conversion signal to generate an output signal. Then, the inverse transform unit 173 outputs an output signal.
- the inverse transformation method in the inverse transformation unit 173 the inverse transformation method in the inverse transformation unit 161 can be used.
- component information may be analyzed for either the first input signal or the second input signal.
- you may analyze component information with respect to both the 1st and 2nd input signals. Analysis of the component information for the first and second input signals is controlled by the analysis control information.
- the signal analysis unit 101 receives the first input signal, the second input signal composed of the target sound and the background sound, and the analysis control information, and receives the target sound and the background sound for the second input signal.
- the suppression coefficient that expresses the relationship with is calculated.
- the signal analysis unit 101 generates inter-signal information that represents the relationship between the first input signal and the second input signal.
- the signal analysis unit 101 generates component element information from the suppression coefficient and the inter-signal information, encodes the component element information and the analysis control information, and outputs the encoded component information and analysis control information to the multiplexing unit 102.
- the suppression coefficient is information that is applied to the input signal to control the component.
- the suppression coefficient is information that is applied to the input signal in order to suppress the background sound.
- the output signal generation unit 151 receives the analysis encoded information and the decoded signal, derives the component information from the analysis encoded information, and configures the first input signal and the second input signal. The output signal is generated and output by controlling the sound and the background sound.
- the analysis information calculation unit 122 receives the first conversion signal, the second conversion signal, and the analysis control information, and outputs analysis coding information.
- the analysis information calculation unit 122 includes an inter-signal information calculation unit 200, suppression coefficient calculation units 201 and 202, a gain inverse conversion unit 203, an analysis information encoding unit 204, and a switch 205.
- the first conversion signal and the second conversion signal are input to the inter-signal information calculation unit 200 and the switch 205.
- the analysis control information is input to the switch 205, the gain reverse conversion unit 203, and the analysis information encoding unit 204.
- the inter-signal information calculation unit 200 receives the first converted signal and the second converted signal, and calculates the energy ratio, phase difference, coherence, etc. between the first converted signal and the second converted signal. Generate as For the energy ratio, the phase difference, and the coherence, an average value, an interval maximum value, an interval minimum value, or the like in the analysis interval may be used.
- the inter-signal information calculation unit 200 outputs the inter-signal information to the gain inverse conversion unit 203.
- the switch 205 outputs the first conversion signal and the second conversion signal to the suppression coefficient calculation units 201 and 202 based on the analysis control information.
- FIG. 8 shows an example in which control is performed so that the suppression coefficient is calculated only for the second converted signal based on the analysis control information.
- the suppression coefficient calculation units 201 and 202 estimate the background sound from the first or second converted signal input thereto, and calculate a suppression coefficient for suppressing the background sound based on the background sound estimation result.
- the background sound estimation result may be an amplitude absolute value or energy of the background sound, or an amplitude ratio or energy ratio between the background sound and the input signal.
- the background sound estimation result may be an absolute value of the background sound amplitude, energy, an amplitude ratio between the background sound and the input signal, an average value of the energy ratio, a section maximum value, and a section minimum value.
- the suppression coefficient calculation units 201 and 202 output the calculated suppression coefficients to the gain inverse conversion unit 203, respectively.
- Non-Patent Document 6 December 1984, IEE Transactions on Axetics Speech and Signal Processing, Vol. 32, as a technique related to the calculation method of the suppression coefficient, Minimum mean square error short time disclosed in No. 6, (IEEE TRANSACTIONS ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOL.32, NO. 6, PP. 1109-1121, Dec.
- Non-Patent Document 7 September 1985, IEE Transactions on Axetics Speech and Signal Processing, Vol. 33, No. 2 No., (IEEE TRANSACTIONS ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOL.33, NO. 2, PP. 443-445, Apr. 1985) pp. 443-445)
- Non-Patent Document 8 July 2005, Euraship Journal on Applied Signal Processing, Vol. 2005, No.
- the gain inverse transform unit 203 receives the inter-signal information, the suppression coefficient, and the analysis control information, and calculates them as component element information.
- Gain inverse transform section 203 outputs the component element information to analysis information encoding section 204.
- the component information is, for example, SG (1), SG (2) as the suppression coefficient, and G (1), G (2) as the energy ratio constituting the inter-signal information, and the gain constituting the component information is It is calculated as Equation 1.
- g () represents a gain constituting the component element information.
- the phase difference and coherence may be combined as component information in addition to the gain g ().
- the analysis information encoding unit 204 encodes the received component element information and analysis control information, and outputs the encoding result as analysis encoding information.
- a method similar to that already described with respect to the quantization unit 112 may be used. By encoding, the redundancy of the component element information and the analysis control information can be removed.
- the analysis information encoding unit 204 may output the component element information and the analysis control information as analysis encoding information without performing these encoding processes. .
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 300, a rendering control information separation unit 301, and a rendering unit 302.
- the decoded conversion signal is input to the rendering unit 302
- the analysis encoding information is input to the analysis information decoding unit 300
- the reproduction control information is input to the rendering control information separation unit 301.
- the analysis information decoding unit 300 decodes the component element information and the analysis control information from the received analysis encoding information, and outputs the component element information and the analysis control information to the rendering unit 302. When the component element information and the analysis control information are not encoded, the analysis information decoding unit 300 directly outputs the component element information and the analysis control information without performing the decoding process.
- the rendering control information separation unit 301 separates rendering information from the received reproduction control information.
- the rendering control information separation unit 301 outputs the rendering information to the rendering unit 302.
- the playback control information that is, the rendering information is input to the rendering unit 302.
- the rendering information is information that represents the relationship between the constituent elements constituting the decoded conversion signal and the output conversion signal for each frequency component, and can be expressed using energy difference, time difference, correlation, etc. between the signals.
- rendering information disclosed in Non-Patent Document 9 (2007, IS / 23003-1: 2007 Part 1 mpeg Surround, (ISO / IEC 23003-1: 2007 Part 1 MPEG MPEG Surround)) is known. ing.
- the rendering unit 302 uses the component element information, the analysis control information, and the rendering information to control each component corresponding to the sound source constituting the decoded conversion signal. Then, the rendering unit 302 changes the relationship between the plurality of components and generates an output conversion signal. The rendering unit 302 first calculates an output generation parameter for changing the relationship between a plurality of constituent elements from the constituent element information, the analysis control information, and the rendering information. Next, the rendering unit 302 generates an output conversion signal from the decoded conversion signal using the output generation parameter.
- the output generation parameter corresponding to each frequency component of the frequency band f is W (f)
- the rendering information is U (f)
- the gain in the component information is g (k, p, f)
- k 1,2 , ..., K
- p 1,2, ..., P
- the output generation parameter W (f) is
- K is the number of components and is determined from the analysis control information.
- P is the number of channels of the decoded conversion signal.
- the order in the row direction of the matrix H (f) of Equation 2 and the order in the column direction of the matrix U (f) are controlled by the dependency relationship between the components included in the analysis control information and the input signal. Thereby, it becomes possible to control a desired component.
- Non-Patent Document 9 As a method for calculating an output conversion signal from a decoded conversion signal using the output generation parameter W (f), a method disclosed in Non-Patent Document 9 is known.
- the output generation parameter W (f) is used as a data stream output to the MPEG Surround decoder. Note that the output generation parameter W (f) used in the MPEG Surround decoder may be output without being converted into a data stream.
- V (f) W (f) ⁇ X (f).
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 300, a rendering unit 303, a rendering control information separation unit 304, and a gain correction unit 305.
- FIG. 9 showing the first configuration example of the signal control unit 172
- the addition of the gain correction unit 305 and the operations of the rendering control information separation unit 304 and the rendering unit 303 are different.
- the decoded conversion signal is input to the rendering unit 303
- the analysis encoding information is input to the analysis information decoding unit 300
- the reproduction control information is input to the rendering control information separation unit 304.
- the analysis information decoding unit 300 decodes the component element information and the analysis control information from the received analysis encoding information, and outputs the component element information and the analysis control information to the gain correction unit 305. When the component element information and the analysis control information are not encoded, the analysis information decoding unit 300 directly outputs the component element information and the analysis control information without performing the decoding process.
- the rendering control information separation unit 304 separates the rendering information and the signal control information from the received reproduction control information.
- the rendering control information separation unit 304 outputs the rendering information to the rendering unit 303 and outputs the signal control information to the gain correction unit 305.
- the gain correction unit 305 corrects the gain constituting the component information using the received signal control information and analysis control information, and outputs the component information including the correction gain to the rendering unit 303.
- a (k, f) is a variable that controls the k-th component.
- the matrix A (f) is a KxK diagonal matrix with the number K of components.
- the order of the diagonal elements of the matrix A (f) is controlled by the dependency relationship between the constituent elements included in the analysis control information and the input signal.
- a desired component can be controlled by controlling the order of the matrix A (f) representing the signal control information in accordance with the dependency.
- the rendering unit 303 uses the component element information and the rendering information to control each component corresponding to the sound source constituting the decoded converted signal, changes the relationship between the plurality of components, and generates an output converted signal .
- the rendering unit 303 first calculates an output generation parameter for changing the relationship between a plurality of components from the correction gain that constitutes the component information and the rendering information.
- the rendering unit 303 calculates an output conversion signal from the decoded conversion signal using the output generation parameter.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 300, a rendering unit 303, a rendering control information separation unit 304, a gain conversion unit 306, a gain reverse conversion unit 307, and a sub gain correction unit 308.
- the gain correction unit 305 is replaced with a gain conversion unit 306, a gain reverse conversion unit 307, and a sub gain correction unit 308.
- the decoded conversion signal is input to the rendering unit 303, the analysis encoding information is input to the analysis information decoding unit 300, and the reproduction control information is input to the rendering control information separation unit 304. Since the analysis information decoding unit 300, the rendering unit 303, and the rendering control information separation unit 304 are the same as those in the second configuration example, description thereof is omitted. Note that the component information that is the output of the analysis information decoding unit 300 is output to the gain conversion unit 306, and the analysis control information is output to the gain conversion unit 306, the gain reverse conversion unit 307, and the sub gain correction unit 308. The signal control information that is the output of the rendering control information separation unit 304 is output to the sub-gain correction unit 308.
- the gain conversion unit 306 generates the inter-signal information and the suppression coefficient from the component element information using the analysis control information.
- the gain conversion unit 306 outputs the inter-signal information to the gain reverse conversion unit 307 and outputs the suppression coefficient to the sub gain correction unit 308.
- the conversion from the component element information to the inter-signal information and the suppression coefficient is equivalent to the inverse conversion of Equation 1, where SG (m) is the suppression coefficient and G (m) is the energy ratio constituting the inter-signal information. It is expressed as 6.
- g () represents a gain constituting the component element information.
- k is a component index
- m is an input signal index.
- k m is a component index of the target sound constituting the mth input signal.
- k, m, and k m are derived from analysis control information that represents the dependency between the component and the input signal. Note that k ⁇ m represents an index of all the components constituting the mth input signal.
- the number of input signals is two, and as shown in FIG. 8, the suppression coefficient is not calculated for the first input signal. Therefore, the energy ratio and the suppression coefficient constituting the inter-signal information are
- the sub-gain correction unit 308 corrects the suppression coefficient using the received signal control information and analysis control information, and outputs the corrected suppression coefficient to the gain inverse conversion unit 307.
- the signal control information for controlling the magnitude of the target sound is B (m) and the corrected suppression coefficient is SG ′ (m)
- SG ′ (m) B ( m) ⁇ SG (m).
- m is an index of the input signal.
- the suppression coefficient is not calculated for the first input signal, correction by the signal control information is not targeted.
- the suppression coefficient is calculated for the first input signal, the same correction can be performed for the suppression coefficient of the first input signal.
- Information such as each input signal being decomposed into a plurality of components is derived from the analysis control information.
- the gain reverse conversion unit 307 receives the inter-signal information, the correction suppression coefficient, and the analysis control information, calculates the correction gain, and calculates the component information including the correction gain.
- the correction gain calculation method is based on Equation 1 as in the gain inverse transform unit 203 described with reference to FIG. Furthermore, the total correction gain for each input signal may be modified to be the same as the total gain before correction. In this correction, the correction gain can be corrected using the fact that the sum of the correction suppression coefficient SG ′ (m) of the target sound and the coefficient 1 ⁇ SG ′ (m) of the background sound is 1.
- the gain reverse conversion unit 307 outputs the component element information to the rendering unit 303.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 300, a rendering unit 303, a rendering control information separation unit 304, a gain conversion unit 306, a gain inverse conversion unit 307, a sub gain correction unit 309, a sub gain lower limit value correction unit 310, and a sub gain lower limit value estimation. Part 311 is comprised. Compared with FIG.
- the sub gain correction unit 308 is replaced with a sub gain correction unit 309, a sub gain lower limit value correction unit 310, and a sub gain lower limit value estimation unit 311.
- the decoded conversion signal is input to the rendering unit 303
- the analysis encoding information is input to the analysis information decoding unit 300
- the reproduction control information is input to the rendering control information separation unit 304. Since the analysis information decoding unit 300, the rendering unit 303, the rendering control information separation unit 304, the gain conversion unit 306, and the gain reverse conversion unit 307 are the same as those in the third configuration example, the description thereof is omitted.
- the analysis control information which is the output of the analysis information decoding unit 300, is output to the gain conversion unit 306, the gain reverse conversion unit 307, the sub gain correction unit 309, and the sub gain lower limit value correction unit 310.
- the signal control information that is the output of the rendering control information separating unit 304 is output to the sub-gain lower limit correcting unit 310.
- the suppression coefficient that is the output of the gain conversion unit 306 is output to the sub-gain correction unit 309 and the sub-gain lower limit value estimation unit 311.
- the sub-gain lower limit value estimation unit 311 estimates a correction value for correcting the suppression coefficient from the received suppression coefficient.
- the correction value may be a coefficient correction lower limit value.
- Sub gain lower limit value estimation section 311 outputs the coefficient correction lower limit value to sub gain correction section 309 and sub gain lower limit value correction section 310.
- the coefficient correction lower limit value represents the lower limit value of the suppression coefficient.
- a specific value may be stored in advance in the memory, or may be calculated according to the suppression coefficient.
- the coefficient correction lower limit value an appropriate value may be selected from a plurality of values stored in the memory.
- the coefficient correction lower limit value may be set to be small when the background sound estimation result is small. A small background sound estimation result indicates that the target sound is dominant in the input signal. This is because when the background sound estimation result is small, distortion hardly occurs in the operation of the component.
- a method for estimating the coefficient correction lower limit value from the suppression coefficient will be described in detail.
- a method in which a value obtained by smoothing the suppression coefficient in the frequency direction is used as the coefficient correction lower limit value may be used.
- the suppression coefficient is calculated for each input signal, for simplicity, an index for distinguishing the input signal is not attached.
- the coefficient correction lower-limit value L (f), f 0,.
- F is the number of suppression coefficients in the frequency direction
- max (x, y) represents the larger of x and y.
- T1 (n, f) and T2 (n, f) are intermediate parameters
- a (f), b (f), and c (f) are parameters for smoothing.
- a moving average of the suppression coefficient SG (n, f) in the frequency direction can be used.
- the coefficient correction lower limit is
- w (m) is the weight of the moving average and can be set so that the sum of w (m) is 1.
- the suppression coefficient SG (n, f) is grouped in the time and / or frequency direction, or one of the directions, and the minimum value or average of the suppression coefficients in each group.
- the value may be used as the coefficient correction lower limit value of the group.
- a small number of suppression coefficients may be grouped in the low frequency band and a large number of suppression coefficients may be grouped in the high frequency band in accordance with human auditory characteristics. This grouping may be set in advance or may be calculated according to the suppression coefficient.
- coefficient correction lower limit value calculated by the first to third method examples may be smoothed in the time direction.
- the sub gain lower limit correction unit 310 corrects the coefficient correction lower limit value using the signal control information, and outputs the correction coefficient correction lower limit value to the sub gain correction unit 309.
- a method of correcting the coefficient correction lower limit value will be described.
- the coefficient correction lower limit is used to control this trade-off. Therefore, the trade-off between the residual background sound and the magnitude of the output signal distortion can be controlled by correcting the coefficient correction lower limit value with the signal control information. With such a configuration, the suppression coefficient can be controlled by the signal control information, and the background sound and distortion can be easily controlled.
- the coefficient correction lower limit value may be corrected by generating the magnification of the coefficient correction lower limit value from the allowable residual background sound and multiplying the coefficient correction lower limit value by the magnification of the coefficient correction lower limit value.
- FIG. 36 has a characteristic of increasing to the right so that the magnification of the coefficient correction lower-limit value increases when the signal control information is large.
- the coefficient correction lower limit value is amplified and used. This is equivalent to using a larger coefficient correction lower limit.
- the coefficient correction lower limit value may be corrected directly with respect to the input signal control information without using the coefficient correction lower limit value magnification.
- FIG. 37 shows an example of the relationship between the correction coefficient correction lower-limit value and the signal control information when the residual background sound level allowed as the signal control information is input.
- FIG. 37 has a characteristic that the correction coefficient correction lower-limit value increases when the signal control information is large, and rises to the right.
- the signal control information is an intermediate value (in the example of FIG. 37, the signal control value is 0.5)
- the correction coefficient correction lower limit value and the coefficient correction lower limit value have the same characteristics.
- the sub-gain correction unit 309 corrects the suppression coefficient using the coefficient correction lower limit value and the correction coefficient correction lower limit value, and outputs the corrected suppression coefficient to the gain inverse conversion unit 307.
- a method for generating the corrected suppression coefficient will be described in detail.
- the coefficient correction lower limit value is compared with the suppression coefficient. If the coefficient correction lower limit value and the suppression coefficient are the same value, the sub-gain correction unit 309 outputs the correction coefficient correction lower limit value as the correction suppression coefficient. On the other hand, when the coefficient correction lower limit value and the suppression coefficient are not the same value, the sub-gain correction unit 309 outputs the larger one of the suppression coefficient and the correction coefficient correction lower limit value as the correction suppression coefficient.
- a method disclosed in Patent Document 1 that does not compare the coefficient correction lower limit value with the suppression coefficient may be used.
- the method disclosed in Patent Document 1 is a method of comparing a suppression coefficient and a correction coefficient correction lower limit value.
- the sub-gain correction unit 309 When the suppression coefficient is larger than the correction coefficient correction lower limit value, the sub-gain correction unit 309 outputs the suppression coefficient as the corrected suppression coefficient. If the suppression coefficient is smaller than the correction coefficient correction lower limit value, the sub-gain correction unit 309 outputs the correction coefficient correction lower limit value as the correction suppression coefficient.
- the input signal composed of a plurality of components is received for each component by the reception unit. Can be controlled. Furthermore, since the signal is analyzed by the transmission unit, the reception unit can reduce the amount of calculation related to the signal analysis. Further, even when there are a plurality of input signals of the transmission unit, by using information representing the relationship between the input signal included in the analysis control information and each component, a plurality of components constituting the input signal can be obtained. Each can be controlled independently of the other input signal components. Furthermore, by using the information regarding the classification of each component included in the analysis control information, it is possible to control each component according to the classification.
- the target sound can be controlled according to the target sound
- the background sound can be controlled according to the background sound.
- a more desired output signal can be obtained by the control according to the classification of the constituent elements.
- information representing the relationship between the input signal and each component and information relating to the classification of each component it is possible to perform accurate control on each component. For example, when there is a first and second signal including a target sound and a background sound, the background sound included in the first signal is suppressed with respect to the target sound included in the second signal. Inaccurate control over irrelevant components can be eliminated.
- a second embodiment of the present invention will be described.
- the second embodiment differs from the first embodiment in the operations of the analysis information calculation unit 122 and the signal control unit 172.
- the description of the overlapping part is omitted.
- the analysis information calculation unit 122 receives the first conversion signal, the second conversion signal, and the analysis control information, and outputs analysis coding information.
- the analysis information calculation unit 122 includes an inter-signal information calculation unit 200, suppression coefficient calculation units 206 and 207, a gain inverse conversion unit 203, an analysis information encoding unit 208, and a switch 205.
- the first conversion signal and the second conversion signal are input to the inter-signal information calculation unit 200 and the switch 205.
- the analysis control information is input to the switch 205, the gain reverse conversion unit 203, and the analysis information encoding unit 208.
- the suppression coefficient calculation units 201 and 202 are replaced with suppression coefficient calculation units 206 and 207, and the analysis information encoding unit 204 performs analysis information
- the encoding unit 208 is replaced.
- the inter-signal information calculation unit 200, the gain reverse conversion unit 203, and the switch 205 are the same as those in FIG.
- the suppression coefficient calculation units 206 and 207 estimate the background sound from the first or second converted signal inputted to each, and based on the background sound estimation result, the suppression coefficient for suppressing the background sound and the target sound existence probability Is calculated.
- the target sound existence probability represents how much the target sound is included in the input signal.
- the target sound existence probability can be expressed by a ratio of the amplitude and power of the target sound and the background sound.
- the target sound existence probability an amplitude or power ratio between the target sound and the background sound may be used.
- a short-time average, maximum value, minimum value, etc. of the amplitude and power ratio between the target sound and the background sound may be used.
- Suppression coefficient calculation sections 206 and 207 output the suppression coefficient to gain inverse conversion section 203 and output the target sound existence probability to analysis information encoding 208.
- a method for calculating the suppression coefficient the technique disclosed in Non-Patent Document 6, Non-Patent Document 7, or Non-Patent Document 8 described above may be used.
- a calculation method of the target sound existence probability a method disclosed in Patent Document 1 may be used. Instead of sequentially calculating the target sound existence probability, a fixed value may be stored in the memory, and this may be read and used sequentially. When no conversion signal is input from the switch 205, the suppression coefficient and the target sound existence probability may not be output, or the suppression coefficient and the target sound presence probability may be output as 1.
- the analysis information encoding unit 208 encodes the received component element information, analysis control information, and target sound existence probability, and outputs the encoding result as analysis encoding information.
- a method similar to that already described with respect to the quantization unit 112 may be used. By encoding, redundancy of component element information, analysis control information, and target sound existence probability can be removed. Also, the analysis information encoding unit 208, when it is not necessary to reduce the amount of information, does not perform these encoding processes and uses the component element information, the analysis control information, and the target sound existence probability as the analysis encoding information. It may be output.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 312, a gain correction unit 313, a rendering control information separation unit 304, and a rendering unit 303.
- the decoded conversion signal is input to the rendering unit 303
- the analysis encoding information is input to the analysis information decoding unit 312
- the reproduction control information is input to the rendering control information separation unit 304.
- the analysis information decoding unit 300 is replaced with the analysis information decoding unit 312, and the gain correction unit 305 is replaced with the gain correction unit 313.
- the rendering control information separation unit 304 and the rendering unit 303 are the same as those in FIG.
- the analysis information decoding unit 312 decodes the component element information, the analysis control information, and the target sound existence probability from the received analysis coding information, and sends the component element information, the analysis control information, and the target sound existence probability to the gain correction unit 313. Output.
- the analysis information decoding unit 312 directly outputs the component element information, the analysis control information, and the target sound existence probability without performing the decoding process.
- the gain correction unit 313 corrects the gain constituting the component element information using the received signal control information, analysis control information, and target sound existence probability, and outputs the component element information including the correction gain to the rendering unit 303.
- the signal control information A (f) for controlling the target sound expressed by Equation 5 is corrected using the target sound existence probability, and the correction gain is calculated from the corrected signal control information and the gain. You may do it. Thereby, it is possible to control the gain constituting the component according to the target sound existence probability.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 312, a rendering unit 303, a rendering control information separation unit 304, a gain conversion unit 306, a gain reverse conversion unit 307, and a sub gain correction unit 314.
- the analysis information decoding unit 300 is replaced with the analysis information decoding unit 312, and the sub gain correction unit 308 is replaced with the sub gain correction unit 314. .
- the rendering unit 303, the rendering control information separation unit 304, the gain conversion unit 306, and the gain reverse conversion unit 307 are the same as those in FIG.
- the analysis information decoding unit 312 is the same as the fifth configuration example of FIG. Note that the target sound existence probability that is the output of the analysis information decoding unit 312 is output to the sub-gain correction unit 314, and the analysis control information is output to the gain conversion unit 306, the gain reverse conversion unit 307, and the sub-gain correction unit 314, and component information Is output to the gain converter 306.
- the sub-gain correction unit 314 corrects the suppression coefficient using the received signal control information, analysis control information, and target sound existence probability, and outputs the corrected suppression coefficient to the gain inverse conversion unit 307.
- m is an index of the input signal.
- the suppression coefficient is not calculated for the first input signal, correction by the signal control information is not targeted.
- the suppression coefficient is calculated for the first input signal, the same correction can be performed for the suppression coefficient of the first input signal.
- Information such as each input signal being decomposed into a plurality of components is derived from the analysis control information.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 312, a rendering unit 303, a rendering control information separation unit 304, a gain conversion unit 306, a gain inverse conversion unit 307, a sub gain correction unit 309, a sub gain lower limit value correction unit 315, and a sub gain lower limit value estimation. Part 311 is comprised.
- Part 311 is comprised.
- the analysis information decoding unit 300 is replaced with the analysis information decoding unit 312, and the sub gain lower limit value correcting unit 310 is replaced with the sub gain lower limit value correcting unit 315.
- the rendering unit 303, the rendering control information separation unit 304, the gain conversion unit 306, the gain reverse conversion unit 307, the sub gain correction unit 309, and the sub gain lower limit value estimation unit 311 are the same as those in FIG.
- the analysis information decoding unit 312 is the same as the fifth configuration example of FIG.
- the target sound existence probability that is the output of the analysis information decoding unit 312 is output to the sub-gain lower limit correction unit 315, and the analysis control information is the gain conversion unit 306, gain inverse conversion unit 307, sub-gain correction unit 309, and sub-gain lower limit correction
- the component information is output to the unit 315, and the component information is output to the gain converter 306.
- the sub gain lower limit correcting unit 315 corrects the coefficient correction lower limit value using the signal control information and the target sound existence probability, and outputs the corrected coefficient correction lower limit value to the sub gain correcting unit 309.
- the coefficient correction lower limit value is corrected based on the signal control information.
- the coefficient correction lower limit value is corrected based on the signal control information and the target sound existence probability. Different.
- the trade-off between the residual background sound and the magnitude of the output signal distortion is controlled by correcting the coefficient correction lower limit value with the signal control information. be able to. Furthermore, since this trade-off differs depending on the signal characteristics, that is, whether the main component of the signal is speech or background sound, control suitable for the signal characteristics is possible by using the target sound existence probability. More specifically, based on the target sound existence probability, small residual background sound in the background sound section is obtained by performing suppression with priority on low distortion in the speech section and suppressing priority on low residual background sound in the non-speech section. And a small output signal distortion in the voice section can be achieved.
- the magnitude of the residual background sound allowed as signal control information may be input.
- the magnification of the coefficient correction lower-limit value is generated from the allowable residual background sound, and the method of generating the coefficient correction lower-limit value is switched according to the target sound existence probability.
- the coefficient correction lower limit value may be modified by multiplying the coefficient correction lower limit value by the magnification of the generated coefficient correction lower limit value.
- FIG. FIG. 38 is different from FIG. 36 in that FIG. 38 has a plurality of characteristics corresponding to the target sound existence probability.
- FIG. 38 is equivalent to FIG. 36 when the target sound existence probability is a fixed value.
- the characteristic of FIG. 38 is obtained by changing the characteristic of FIG. 36 according to the target sound existence probability.
- the signal control information when the signal control information is 1, this indicates that the residual background sound is allowed, and the minimum output signal distortion is minimized.
- the signal control information when the signal control information is 0, it represents that the output signal distortion is allowed, and the residual background sound is minimized.
- the coefficient correction lower limit value may be corrected directly with respect to the input signal control information without using the coefficient correction lower limit value magnification.
- FIG. 39 shows an example of the relationship between the correction coefficient correction lower limit value and the signal control information when the residual background sound level allowed as the signal control information is input. 39 differs from FIG. 37 in that FIG. 39 has a plurality of characteristics corresponding to the target sound existence probability. If the target sound existence probability is a fixed value, FIG. 39 is equivalent to FIG. That is, the characteristic of FIG. 39 is obtained by changing the characteristic of FIG. 37 according to the target sound existence probability. Similarly to FIG. 37, in FIG. 39, when the signal control information is 1, this indicates that the residual background sound is allowed, and the minimum output signal distortion is minimized. On the other hand, when the signal control information is 0, it represents that the output signal distortion is allowed, and the residual background sound is minimized.
- the input signal composed of a plurality of components is received for each component by the reception unit. Can be controlled. Further, even when there are a plurality of input signals of the transmission unit, by using information representing the relationship between the input signal included in the analysis control information and each component, a plurality of components constituting the input signal can be obtained. Each can be controlled independently of the other input signal components. Furthermore, by using the information regarding the classification of each component included in the analysis control information, it is possible to control each component according to the classification. For example, when the constituent elements are the target sound and the background sound, the target sound can be controlled according to the target sound, and the background sound can be controlled according to the background sound.
- a more desired output signal can be obtained by control according to the classification of each component. Further, by using the target sound existence probability, the relationship between the signal distortion and the residual background sound can be set to a desired balance relationship by control suitable for the signal characteristics. By using the target sound existence probability, it becomes possible to obtain an output signal with higher quality.
- a third embodiment of the present invention will be described.
- the third embodiment differs from the first embodiment in the operations of the analysis information calculation unit 122 and the signal control unit 172.
- the description of the overlapping part is omitted.
- the analysis information calculation unit 122 receives the first conversion signal, the second conversion signal, and the analysis control information, and outputs analysis coding information.
- the analysis information calculation unit 122 includes an inter-signal information calculation unit 200, suppression coefficient calculation units 209 and 210, a gain inverse conversion unit 203, an analysis information encoding unit 211, and a switch 205.
- the first conversion signal and the second conversion signal are input to the inter-signal information calculation unit 200 and the switch 205.
- the analysis control information is input to the switch 205, the gain reverse conversion unit 203, and the analysis information encoding unit 211.
- the suppression coefficient calculation units 201 and 202 are replaced with suppression coefficient calculation units 209 and 210, and the analysis information encoding unit 204
- the encoding unit 211 is replaced.
- the inter-signal information calculation unit 200, the gain reverse conversion unit 203, and the switch 205 are the same as those in FIG.
- Suppression coefficient calculators 209 and 210 estimate the background sound from the first or second converted signal input to each, and obtain a suppression coefficient and a suppression coefficient for suppressing the background sound based on the background sound estimation result. A correction value for correction is calculated.
- the correction value may be a coefficient correction lower limit value.
- the correction value will be described as a coefficient correction lower limit value.
- Suppression coefficient calculation sections 209 and 210 output the suppression coefficient to gain inverse conversion section 203, and output the coefficient correction lower limit value to analysis information encoding 211.
- the technique disclosed in Non-Patent Document 6, Non-Patent Document 7, or Non-Patent Document 8 described above may be used.
- a method disclosed in Patent Document 1 may be used. Instead of sequentially calculating the coefficient correction lower limit value, a fixed value may be stored in the memory, and this may be read and used sequentially. When no conversion signal is input from the switch 205, the suppression coefficient and the coefficient correction lower limit value may not be output, or the suppression coefficient may be output as 1.
- the analysis information encoding unit 211 encodes the received component element information, analysis control information, and coefficient correction lower limit value, and outputs the encoding result as analysis encoding information.
- a method similar to that already described with respect to the quantization unit 112 may be used. By encoding, redundancy of component element information, analysis control information, and coefficient correction lower-limit value can be removed. Also, the analysis information encoding unit 211, when it is not necessary to reduce the amount of information, without performing these encoding processes, the component element information, the analysis control information, and the coefficient correction lower limit value as analysis encoding information It may be output.
- the eighth configuration example of the signal control unit 172 will be described in detail with reference to FIG.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 316, a rendering unit 303, a rendering control information separation unit 304, a gain conversion unit 306, a gain reverse conversion unit 307, a sub gain correction unit 309, and a sub gain lower limit value correction unit 310. .
- the analysis information decoding unit 300 is replaced with the analysis information decoding unit 316, and the sub-gain lower limit value estimation unit 311 is not provided.
- the rendering unit 303, the rendering control information separation unit 304, the gain conversion unit 306, the gain reverse conversion unit 307, the sub gain correction unit 309, and the sub gain lower limit correction unit 310 are the same as those in FIG.
- the analysis information decoding unit 316 decodes the component element information, the analysis control information, and the coefficient correction lower limit value from the received analysis coding information, outputs the component element information to the gain conversion unit 306, and the coefficient correction lower limit value is the sub gain correction.
- Unit 309 and sub gain lower limit correction unit 310, and analysis control information is output to gain conversion unit 306, gain reverse conversion unit 307, sub gain correction unit 309, and sub gain lower limit value correction unit 310.
- the analysis information decoding unit 316 directly outputs the component element information, the analysis control information, and the coefficient correction lower limit value without performing the decoding process.
- the input signal composed of a plurality of components is received for each component by the reception unit. Can be controlled. Furthermore, since the signal is analyzed by the transmission unit, the reception unit can reduce the amount of calculation related to the signal analysis. Further, even when there are a plurality of input signals of the transmission unit, by using information representing the relationship between the input signal included in the analysis control information and each component, a plurality of components constituting the input signal can be obtained. Each can be controlled independently of the other input signal components.
- a fourth embodiment of the present invention will be described.
- the fourth embodiment differs from the first embodiment in the operations of the analysis information calculation unit 122 and the signal control unit 172.
- the description of the overlapping part is omitted.
- the analysis information calculation unit 122 receives the first conversion signal, the second conversion signal, and the analysis control information, and outputs analysis coding information.
- the analysis information calculation unit 122 includes an inter-signal information calculation unit 200, suppression coefficient calculation units 212 and 213, a gain inverse conversion unit 203, an analysis information encoding unit 214, and a switch 205.
- the first conversion signal and the second conversion signal are input to the inter-signal information calculation unit 200 and the switch 205.
- the analysis control information is input to the switch 205, the gain reverse conversion unit 203, and the analysis information encoding unit 214.
- the suppression coefficient calculation units 201 and 202 are replaced with suppression coefficient calculation units 212 and 213, and the analysis information encoding unit 204 performs analysis information analysis.
- the encoding unit 214 is replaced.
- the inter-signal information calculation unit 200, the gain reverse conversion unit 203, and the switch 205 are the same as those in FIG.
- Suppression coefficient calculators 212 and 213 estimate the background sound from the first or second converted signal input to each, and suppress the background sound based on the background sound estimation result and the target sound existence probability. And a correction value for correcting the suppression coefficient.
- the correction value may be a coefficient correction lower limit value.
- the correction value will be described as a coefficient correction lower limit value.
- the suppression coefficient calculation units 212 and 213 output the suppression coefficient to the gain inverse conversion unit 203, and outputs the target sound existence probability and the coefficient correction lower limit value to the analysis information encoding 214.
- the technique disclosed in Non-Patent Document 6, Non-Patent Document 7, or Non-Patent Document 8 described above may be used.
- the method disclosed in Patent Document 1 may be used. Instead of sequentially calculating the target sound existence probability and the coefficient correction lower limit value, a fixed value may be stored in the memory, and this may be read and used sequentially. When no conversion signal is input from the switch 205, the suppression coefficient, the target sound existence probability, and the coefficient correction lower limit value may not be output, or the suppression coefficient and the target sound existence probability may be output as 1.
- the analysis information encoding unit 214 encodes the received component element information, analysis control information, target sound existence probability, and coefficient correction lower limit value, and outputs the encoding result as analysis encoding information.
- a method similar to that already described with respect to the quantization unit 112 may be used.
- the analysis information encoding unit 214 when it is not necessary to reduce the amount of information, without performing these encoding processes, the component element information, the analysis control information, the target sound existence probability, the coefficient correction lower limit value, May be output as analysis coding information.
- the ninth configuration example of the signal control unit 172 will be described in detail with reference to FIG.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 317, a rendering unit 303, a rendering control information separation unit 304, a gain conversion unit 306, a gain reverse conversion unit 307, a sub gain correction unit 309, and a sub gain lower limit value correction unit 315. .
- the analysis information decoding unit 312 is replaced with the analysis information decoding unit 317, and the sub-gain lower limit value estimation unit 311 is not provided.
- the rendering unit 303, the rendering control information separation unit 304, the gain conversion unit 306, the gain reverse conversion unit 307, the sub gain correction unit 309, and the sub gain lower limit correction unit 315 are the same as those in FIG.
- the analysis information decoding unit 317 decodes the component element information, the analysis control information, the target sound existence probability, and the coefficient correction lower-limit value from the received analysis coding information, outputs the component element information to the gain conversion unit 306, and outputs the target sound
- the existence probability is output to the sub gain lower limit correction unit 315
- the coefficient correction lower limit value is output to the sub gain correction unit 309 and the sub gain lower limit correction unit 315
- the analysis control information is the gain conversion unit 306, the gain reverse conversion unit 307, and the sub gain correction. Output to unit 309 and sub-gain lower limit correction unit 315.
- the analysis information decoding unit 317 does not perform the decoding process, and the component element information, the analysis control information, and the target sound existence probability And the coefficient correction lower limit value are output directly.
- the input signal composed of a plurality of components is received for each component at the reception unit. Can be controlled. Furthermore, since the signal is analyzed by the transmission unit, the reception unit can reduce the amount of calculation related to the signal analysis. Further, even when there are a plurality of input signals of the transmission unit, by using information representing the relationship between the input signal included in the analysis control information and each component, a plurality of components constituting the input signal can be obtained. Each can be controlled independently of the other input signal components. Furthermore, by using the information regarding the classification of each component included in the analysis control information, it is possible to control each component according to the classification.
- the target sound can be controlled according to the target sound
- the background sound can be controlled according to the background sound.
- a more desired output signal can be obtained by control according to the classification of each component.
- the target sound existence probability the relationship between the signal distortion and the residual background sound can be set to a desired balance relationship by control suitable for the signal characteristics. By using the target sound existence probability, it becomes possible to obtain an output signal with higher quality.
- a fifth embodiment of the present invention will be described.
- the fifth embodiment differs from the first embodiment in the operations of the analysis information calculation unit 122 and the signal control unit 172.
- the description of the overlapping part is omitted.
- the present embodiment is characterized in that the configuration of analysis encoded information is different from that of the first embodiment.
- the analysis information calculation unit 122 receives the first conversion signal, the second conversion signal, and the analysis control information, and outputs analysis coding information.
- the analysis information calculation unit 122 includes an inter-signal information calculation unit 200, suppression coefficient calculation units 201 and 202, an analysis information encoding unit 220, and a switch 205.
- the first conversion signal and the second conversion signal are input to the inter-signal information calculation unit 200 and the switch 205.
- the analysis control information is input to the switch 205 and the analysis information encoding unit 220.
- the analysis information encoding unit 204 is replaced with the analysis information encoding unit 220 and the gain inverse conversion unit 203 is not provided.
- the inter-signal information calculation unit 200, the suppression coefficient calculation units 201 and 202, and the switch 205 are the same as those in FIG. Note that the inter-signal information output from the inter-signal information calculation unit 200 and the suppression coefficients output from the suppression coefficient calculation units 201 and 202 are output to the analysis information coding unit 220.
- the analysis information encoding unit 220 encodes the received inter-signal information, analysis control information, and suppression coefficient, and outputs the encoding result as analysis encoding information.
- a method similar to that already described with respect to the quantization unit 112 may be used. By encoding, redundancy of inter-signal information, analysis control information, and suppression coefficient can be removed.
- the analysis information encoding unit 220 outputs the inter-signal information, the analysis control information, and the suppression coefficient as analysis encoding information without performing these encoding processes when it is not necessary to reduce the amount of information. May be.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 320, a rendering unit 302, a rendering control information separation unit 301, and a gain reverse conversion unit 307.
- the analysis information decoding unit 300 is replaced with the analysis information decoding unit 320, and a gain inverse conversion unit 307 is added.
- the rendering unit 302 and the rendering control information separation unit 301 are the same as those in FIG. Further, the gain reverse conversion unit 307 is the same as that in FIG.
- the analysis information decoding unit 320 decodes the inter-signal information, the analysis control information, and the suppression coefficient from the received analysis coding information, and outputs the inter-signal information and the suppression coefficient to the gain inverse conversion unit 307, where the analysis control information is gain inverse
- the data is output to the conversion unit 307 and the rendering unit 302.
- the analysis information decoding unit 320 directly outputs the inter-signal information, the analysis control information, and the suppression coefficient without performing the decoding process.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 320, a rendering unit 303, a rendering control information separation unit 304, a gain reverse conversion unit 307, and a gain correction unit 305.
- the analysis information decoding unit 300 is replaced with the analysis information decoding unit 320, and a gain inverse conversion unit 307 is added.
- the rendering unit 303, the rendering control information separation unit 304, and the gain correction unit 305 are the same as those in FIG.
- the analysis information decoding unit 320 and the gain reverse conversion unit 307 are the same as those in FIG. Note that the analysis control information, which is the output of the analysis information decoding unit 320, is output to the gain reverse conversion unit 307 and the gain correction unit 305.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 320, a rendering unit 303, a rendering control information separation unit 304, a gain inverse conversion unit 307, and a sub gain correction unit 308.
- the analysis information decoding unit 300 is replaced with the analysis information decoding unit 320, and the gain conversion unit 306 is not provided.
- the rendering unit 303, the rendering control information separation unit 304, the gain reverse conversion unit 307, and the sub gain correction unit 308 are the same as those in FIG.
- the analysis information decoding unit 320 is the same as that shown in FIG. Note that the analysis control information, which is the output of the analysis information decoding unit 320, is output to the gain reverse conversion unit 307 and the sub gain correction unit 308.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 320, a rendering unit 303, a rendering control information separation unit 304, a gain reverse conversion unit 307, a sub gain correction unit 309, a sub gain lower limit value correction unit 310, and a sub gain lower limit value estimation unit 311. Is done.
- the analysis information decoding unit 300 is replaced with the analysis information decoding unit 320, and the gain conversion unit 306 is not provided.
- the rendering unit 303, the rendering control information separation unit 304, the gain reverse conversion unit 307, the sub gain correction unit 309, the sub gain lower limit value correction unit 310, and the sub gain lower limit value estimation unit 311 are the same as those in FIG.
- the analysis information decoding unit 320 is the same as that shown in FIG. Note that the analysis control information that is the output of the analysis information decoding unit 320 is output to the gain inverse conversion unit 307, the sub gain correction unit 309, and the sub gain lower limit value correction unit 310, and the suppression coefficient is output to the sub gain lower limit value estimation unit 311.
- an input signal composed of a plurality of components is received for each component in the receiver based on the analysis coding information output from the transmitter. Can be controlled. Furthermore, since the signal is analyzed by the transmission unit, the reception unit can reduce the amount of calculation related to the signal analysis. Further, even when there are a plurality of input signals of the transmission unit, by using information representing the relationship between the input signal included in the analysis control information and each component, a plurality of components constituting the input signal can be obtained. Each can be controlled independently of the other input signal components.
- the sixth embodiment differs from the second embodiment in the operations of the analysis information calculation unit 122 and the signal control unit 172. The description of the overlapping part is omitted.
- the present embodiment is characterized in that the configuration of the analysis encoded information is different from that of the second embodiment.
- the sixth configuration example of the analysis information calculation unit 122 will be described in detail with reference to FIG.
- the analysis information calculation unit 122 receives the first conversion signal, the second conversion signal, and the analysis control information, and outputs analysis coding information.
- the analysis information calculation unit 122 includes an inter-signal information calculation unit 200, suppression coefficient calculation units 206 and 207, an analysis information encoding unit 221 and a switch 205.
- the first conversion signal and the second conversion signal are input to the inter-signal information calculation unit 200 and the switch 205.
- the analysis control information is input to the switch 205 and the analysis information encoding unit 221.
- the analysis information encoding unit 208 is replaced with the analysis information encoding unit 221 and the gain inverse conversion unit 203 is not provided.
- the inter-signal information calculation unit 200, the suppression coefficient calculation units 206 and 207, and the switch 205 are the same as those in FIG.
- the inter-signal information output from the inter-signal information calculation unit 200, the suppression coefficient output from the suppression coefficient calculation units 206 and 207, and the target sound presence probability are output to the analysis information encoding unit 221.
- the analysis information encoding unit 221 encodes the received inter-signal information, analysis control information, suppression coefficient, and target sound existence probability, and outputs the encoding result as analysis encoding information.
- a method similar to that already described with respect to the quantization unit 112 may be used. By encoding, redundancy of inter-signal information, analysis control information, suppression coefficient, and target sound existence probability can be removed.
- the analysis information encoding unit 221 analyzes the inter-signal information, the analysis control information, the suppression coefficient, and the target sound existence probability without performing these encoding processes when it is not necessary to reduce the amount of information. You may output as encoding information.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 321, a rendering unit 303, a rendering control information separation unit 304, a gain reverse conversion unit 307, and a gain correction unit 313.
- the analysis information decoding unit 312 is replaced with the analysis information decoding unit 321, and a gain inverse conversion unit 307 is added.
- the rendering unit 303, the rendering control information separation unit 304, and the gain correction unit 313 are the same as those in FIG. Further, the gain reverse conversion unit 307 is the same as that in FIG.
- the analysis information decoding unit 321 decodes the inter-signal information, the analysis control information, the suppression coefficient, and the target sound existence probability from the received analysis coding information, and outputs the inter-signal information and the suppression coefficient to the gain inverse conversion unit 307.
- the analysis control information is output to the gain reverse conversion unit 307 and the gain correction unit 313, and the target sound existence probability is output to the gain correction unit 313.
- the analysis information decoding unit 321 does not perform the decoding process, but the inter-signal information, the analysis control information, the suppression coefficient, and the target sound. Output the existence probability directly.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 321, a rendering unit 303, a rendering control information separation unit 304, a gain reverse conversion unit 307, and a sub gain correction unit 314.
- the analysis information decoding unit 312 is replaced with the analysis information decoding unit 321 and the gain conversion unit 306 is not provided.
- the rendering unit 303, the rendering control information separation unit 304, the gain reverse conversion unit 307, and the sub gain correction unit 314 are the same as those in FIG.
- the analysis information decoding unit 321 is the same as that in FIG.
- the analysis control information that is the output of the analysis information decoding unit 321 is output to the gain reverse conversion unit 307 and the sub gain correction unit 314, the inter-signal information is output to the gain reverse conversion unit 307, and the suppression coefficient and the target sound existence probability are It is output to the sub-gain correction unit 314.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 321, a rendering unit 303, a rendering control information separation unit 304, a gain reverse conversion unit 307, a sub gain correction unit 309, a sub gain lower limit value correction unit 315, and a sub gain lower limit value estimation unit 311. Is done.
- the analysis information decoding unit 312 is replaced with the analysis information decoding unit 321 and the gain conversion unit 306 is not provided.
- the rendering unit 303, the rendering control information separation unit 304, the gain reverse conversion unit 307, the sub gain correction unit 309, the sub gain lower limit value correction unit 315, and the sub gain lower limit value estimation unit 311 are the same as those in FIG.
- the analysis information decoding unit 321 is the same as that in FIG.
- the analysis control information that is the output of the analysis information decoding unit 321 is output to the gain reverse conversion unit 307, the sub gain correction unit 309, and the sub gain lower limit value correction unit 315, and the suppression coefficient is the sub gain correction unit 309 and the sub gain lower limit value estimation unit 311.
- the target sound presence probability is output to the sub-gain lower limit correction unit 315.
- the input signal composed of a plurality of components is received for each component by the reception unit. Can be controlled. Furthermore, since the signal is analyzed by the transmission unit, the reception unit can reduce the amount of calculation related to the signal analysis. Further, even when there are a plurality of input signals of the transmission unit, by using information representing the relationship between the input signal included in the analysis control information and each component, a plurality of components constituting the input signal can be obtained. Each can be controlled independently of the other input signal components. Furthermore, by using the information regarding the classification of each component included in the analysis control information, it is possible to control each component according to the classification.
- the target sound can be controlled according to the target sound
- the background sound can be controlled according to the background sound.
- a more desired output signal can be obtained by control according to the classification of each component.
- the target sound existence probability the relationship between the signal distortion and the residual background sound can be set to a desired balance relationship by control suitable for the signal characteristics. By using the target sound existence probability, it becomes possible to obtain an output signal with higher quality.
- a seventh embodiment of the present invention will be described.
- the seventh embodiment differs from the third embodiment in the operations of the analysis information calculation unit 122 and the signal control unit 172.
- the description of the overlapping part is omitted.
- the present embodiment is characterized in that the configuration of analysis encoded information is different from that of the third embodiment.
- the seventh configuration example of the analysis information calculation unit 122 will be described in detail with reference to FIG.
- the analysis information calculation unit 122 receives the first conversion signal, the second conversion signal, and the analysis control information, and outputs analysis coding information.
- the analysis information calculation unit 122 includes an inter-signal information calculation unit 200, suppression coefficient calculation units 209 and 210, an analysis information encoding unit 222, and a switch 205.
- the first conversion signal and the second conversion signal are input to the inter-signal information calculation unit 200 and the switch 205.
- the analysis control information is input to the switch 205 and the analysis information encoding unit 222.
- the analysis information encoding unit 211 is replaced with the analysis information encoding unit 222 and the gain inverse conversion unit 203 is not provided.
- the inter-signal information calculation unit 200, the suppression coefficient calculation units 209 and 210, and the switch 205 are the same as those in FIG. Note that the inter-signal information output from the inter-signal information calculation unit 200, the suppression coefficient output from the suppression coefficient calculation units 206 and 207, and the coefficient correction lower limit value are output to the analysis information encoding unit 222.
- the analysis information encoding unit 222 encodes the received inter-signal information, analysis control information, suppression coefficient, and coefficient correction lower limit value, and outputs the encoding result as analysis encoding information.
- a method similar to that already described with respect to the quantization unit 112 may be used.
- the analysis information encoding unit 222 analyzes the inter-signal information, the analysis control information, the suppression coefficient, and the coefficient correction lower limit value without performing these encoding processes when it is not necessary to reduce the amount of information. You may output as encoding information.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 322, a rendering unit 303, a rendering control information separation unit 304, a gain reverse conversion unit 307, a sub gain correction unit 309, and a sub gain lower limit value correction unit 310.
- the analysis information decoding unit 316 is replaced with the analysis information decoding unit 322, and the gain conversion unit 306 is not provided.
- the rendering unit 303, the rendering control information separation unit 304, the gain reverse conversion unit 307, the sub gain correction unit 309, and the sub gain lower limit correction unit 310 are the same as those in FIG.
- the analysis information decoding unit 322 decodes the inter-signal information, the analysis control information, the suppression coefficient, and the coefficient correction lower-limit value from the received analysis coding information, and the analysis control information includes the gain reverse conversion unit 307, the sub gain correction unit 309, and the sub gain. It outputs to the lower limit correction unit 310, outputs the suppression coefficient to the sub gain correction unit 309, and outputs the coefficient correction lower limit value to the sub gain correction unit 309 and the sub gain lower limit correction unit 310.
- the analysis information decoding unit 322 does not perform the decoding process, but the inter-signal information, the analysis control information, the suppression coefficient, and the coefficient correction. Outputs the lower limit value directly.
- an input signal composed of a plurality of components is received for each component in the receiver based on the analysis coding information output from the transmitter. Can be controlled. Furthermore, since the signal is analyzed by the transmission unit, the reception unit can reduce the amount of calculation related to the signal analysis. Further, even when there are a plurality of input signals of the transmission unit, by using information representing the relationship between the input signal included in the analysis control information and each component, a plurality of components constituting the input signal can be obtained. Each can be controlled independently of the other input signal components.
- the eighth embodiment of the present invention will be described.
- the eighth embodiment differs from the fourth embodiment in the operations of the analysis information calculation unit 122 and the signal control unit 172.
- the description of the overlapping part is omitted.
- the present embodiment is characterized in that the configuration of the analysis coding information is different from that of the fourth embodiment.
- the analysis information calculation unit 122 receives the first conversion signal, the second conversion signal, and the analysis control information, and outputs analysis coding information.
- the analysis information calculation unit 122 includes an inter-signal information calculation unit 200, suppression coefficient calculation units 212 and 213, an analysis information encoding unit 223, and a switch 205.
- the first conversion signal and the second conversion signal are input to the inter-signal information calculation unit 200 and the switch 205.
- the analysis control information is input to the switch 205 and the analysis information encoding unit 223.
- the inter-signal information calculation unit 200, the suppression coefficient calculation units 212 and 213, and the switch 205 are the same as those in FIG.
- the inter-signal information output from the inter-signal information calculation unit 200, the suppression coefficient output from the suppression coefficient calculation units 212 and 213, the coefficient correction lower limit value, and the target sound existence probability are output to the analysis information encoding unit 223.
- the analysis information encoding unit 223 encodes the received inter-signal information, analysis control information, suppression coefficient, coefficient correction lower limit value, and target sound existence probability, and outputs the encoding result as analysis encoding information.
- a method similar to that already described with respect to the quantization unit 112 may be used.
- the analysis information encoding unit 223, when it is not necessary to reduce the amount of information, does not perform these encoding processes, and performs inter-signal information, analysis control information, a suppression coefficient, a coefficient correction lower limit value, and a target sound.
- the existence probability may be output as analysis coding information.
- the signal control unit 172 receives the decoded conversion signal, the analysis coding information, and the reproduction control information, and outputs an output conversion signal.
- the signal control unit 172 includes an analysis information decoding unit 323, a rendering unit 303, a rendering control information separation unit 304, a gain reverse conversion unit 307, a sub gain correction unit 309, and a sub gain lower limit value correction unit 315.
- the analysis information decoding unit 317 is replaced with the analysis information decoding unit 323, and the gain conversion unit 306 is not provided.
- the rendering unit 303, the rendering control information separation unit 304, the gain reverse conversion unit 307, the sub gain correction unit 309, and the sub gain lower limit value correction unit 315 are the same as those in FIG.
- the analysis information decoding unit 323 decodes the inter-signal information, the analysis control information, the suppression coefficient, the coefficient correction lower limit value, and the target sound existence probability from the received analysis coding information, and the analysis control information is obtained by the gain inverse conversion unit 307 and the sub gain correction. 309 and the sub gain lower limit correction unit 315, the suppression coefficient is output to the sub gain correction unit 309, the target sound existence probability is output to the sub gain lower limit correction unit 315, and the coefficient correction lower limit value is the sub gain correction unit 309 and the sub gain. The result is output to the lower limit correction unit 315.
- the analysis information decoding unit 323 When the inter-signal information, the analysis control information, the suppression coefficient, the coefficient correction lower limit value, and the target sound existence probability are not encoded, the analysis information decoding unit 323 does not perform the decoding process, and the inter-signal information, the analysis control information, The suppression coefficient, the coefficient correction lower limit value, and the target sound existence probability are directly output.
- an input signal composed of a plurality of components is received for each component in the receiver based on the analysis coding information output from the transmitter. Can be controlled. Furthermore, since the signal is analyzed by the transmission unit, the reception unit can reduce the amount of calculation related to the signal analysis. Further, even when there are a plurality of input signals of the transmission unit, by using information representing the relationship between the input signal included in the analysis control information and each component, a plurality of components constituting the input signal can be obtained. Each can be controlled independently of the other input signal components. Furthermore, by using the information regarding the classification of each component included in the analysis control information, it is possible to control each component according to the classification.
- the target sound can be controlled according to the target sound
- the background sound can be controlled according to the background sound.
- a more desired output signal can be obtained by control according to the classification of each component.
- the target sound existence probability the relationship between the signal distortion and the residual background sound can be set to a desired balance relationship by control suitable for the signal characteristics. By using the target sound existence probability, it becomes possible to obtain an output signal with higher quality.
- a ninth embodiment of the present invention will be described. From the first embodiment to the eighth embodiment, only one-way communication has been considered. That is, the communication between the transmission unit built in the terminal and the reception unit built in another terminal has been described.
- both a transmission unit and a reception unit to which the present invention is applied are incorporated in one transmission / reception terminal.
- any of the transmission unit and the reception unit of the first embodiment to the eighth embodiment may be used in combination. Good.
- the ninth embodiment of the present invention by having both the transmission unit and the reception unit, the effect of the present invention can be obtained when used for bidirectional communication such as a video conference terminal and a mobile phone.
- the signal analysis control system of the present invention can also be applied when one-way audio communication such as broadcasting is performed.
- the transmission terminal of the broadcast station may have at least the transmission unit 10 shown in FIG.
- Broadcasting stations include not only broadcasting stations with broadcasting licenses but also points that transmit audio and receive little, such as the main venue of multipoint video conferences. In this case, any of the transmission units in the first to eighth embodiments of the present invention may be used as the transmission terminal.
- the signal analysis control system of the present invention can be applied to a point where only reception is performed.
- the receiving terminal at the point where only reception is performed may have at least the receiving unit 15 shown in FIG. Any of the receiving units in the first to sixth embodiments of the present invention may be used for this receiving terminal.
- the tenth embodiment of the present invention includes computers 1300 and 1301 that operate under program control.
- the computer may be any of a central processing unit, a processor, and a data processing device.
- the computer 1300 performs processing according to any one of the first to ninth embodiments, and operates based on a program for receiving an input signal and outputting a transmission signal.
- the computer 1301 performs processing according to any of the first to ninth embodiments, operates based on a program for receiving a transmission signal and outputting an output signal.
- the transmission process and the reception process may be executed using the same computer.
- the operations of the transmission unit, transmission path, and reception unit have been described. However, the operations may be replaced with a recording unit, a storage medium, and a reproduction unit, respectively.
- the transmission unit 10 illustrated in FIG. 1 may output the transmission signal as a bit stream to a storage medium and record the bit stream on the storage medium.
- the receiving unit 15 may generate the output signal by taking out the bit stream recorded in the storage medium, decoding the bit stream, and performing processing.
- an input signal composed of a plurality of components can be controlled for each component by the receiver based on the signal analysis information obtained by the transmitter. Further, when a plurality of input signals are input instead of one input signal, the relationship between each input signal and the constituent elements included in each input signal is used, and a plurality of input signals are configured. The components can be controlled independently of other input signal components.
- the first signal, the second signal including a plurality of components, the component information indicating the relationship between the components, the component, and the first Receiving analysis control information including information representing a relationship with a second signal, and controlling the first signal or the second signal based on the component element information and the analysis control information.
- the second aspect of the present invention is characterized in that, in the above aspect, the analysis control information includes information representing a classification of each of the plurality of constituent elements.
- the rendering information for outputting the constituent element to a plurality of output channels is received, and based on the constituent element information, the analysis control information, and the rendering information.
- the first signal or the second signal is controlled.
- the signal control information representing the relationship between the plurality of components is received, and the component information is corrected based on the analysis control information and the signal control information.
- the first signal or the second signal is controlled based on the corrected component information and the rendering information.
- the inter-signal information indicating a relationship between the first signal and the second signal based on the component information and the signal control information; Generating a suppression coefficient for suppressing a part of the plurality of components, correcting the suppression coefficient based on the signal control information, the inter-signal information, the corrected suppression coefficient, and the analysis control
- the component information is corrected based on the information, and the first signal or the second signal is controlled based on the corrected component information and the rendering signal.
- a lower limit value of the suppression coefficient is generated, the suppression coefficient is corrected based on the lower limit value of the suppression coefficient and the signal control information, The component information is corrected based on the inter-signal information, the corrected suppression coefficient, and the analysis control information, and the first signal or the rendering signal is corrected based on the corrected component information and the rendering signal.
- the second signal is controlled.
- the seventh aspect of the present invention receives the first signal, the second signal including a plurality of components, and the analysis control information including information indicating the relationship between the second signal,
- the signal analysis method is characterized in that, based on the first signal, the second signal, and the analysis control information, component information representing a relationship between the components is generated.
- an eighth aspect of the present invention is characterized in that, in the above aspect, the analysis control information includes information indicating a classification of each of the plurality of constituent elements.
- the inter-signal information indicates a relationship between the first signal and the second signal based on the first signal and the second signal.
- a suppression coefficient for suppressing a part of the plurality of component elements, and generating the component element information based on the analysis information, the inter-signal information, and the suppression coefficient is included in the above aspect.
- a tenth aspect of the present invention receives a first signal, a second signal including a plurality of components, and analysis control information including information indicating a relationship between the second signal, Based on the first signal, the second signal, and the analysis control information, generate component information representing the relationship between the components, and based on the component information and the analysis control information,
- the signal analysis control method is characterized in that the first signal or the second signal is controlled.
- an eleventh aspect of the present invention is characterized in that, in the above aspect, the analysis control information includes information representing a classification of each of the plurality of constituent elements.
- the twelfth aspect of the present invention includes a first signal, a second signal including a plurality of components, component information representing a relationship between the components, the components and the second And a signal control unit that receives the analysis control information including information representing a relationship with the signal and controls the first signal or the second signal based on the component information and the analysis control information.
- a signal control device characterized by the above.
- a thirteenth aspect of the present invention is characterized in that, in the above aspect, the analysis control information includes information indicating a classification of each of the plurality of constituent elements.
- the signal control unit receives rendering information for outputting the constituent element to a plurality of output channels, and receives the constituent element information, the analysis control information, and the The first signal or the second signal is controlled based on rendering information.
- the component information is received based on the analysis control information and the signal control information based on the signal control information representing the relationship between the plurality of components.
- a component information correcting unit for correcting, and the signal control unit controls the first signal or the second signal based on the corrected component information and the rendering information. To do.
- the inter-signal information indicating the relationship between the first signal and the second signal based on the component element information and the signal control information;
- a component generation unit that generates a suppression coefficient for suppressing a part of the plurality of components, a suppression coefficient correction unit that corrects the suppression coefficient based on the signal control information, the inter-signal information, and the correction
- a component correction unit that corrects component information based on the suppressed suppression coefficient and the analysis control information, and the signal control unit, based on the corrected component information and the rendering signal,
- the first signal or the second signal is controlled.
- the suppression coefficient lower limit value generating unit that generates a lower limit value of the suppression coefficient, the lower limit value of the suppression coefficient, and the signal control information
- a suppression coefficient correction unit that corrects a suppression coefficient, and the component element information correction unit generates component element information based on the inter-signal information, the corrected suppression coefficient, and the analysis control information
- the control unit controls the first signal or the second signal based on the corrected component information and the rendering signal.
- a signal analysis apparatus comprising: a component information generation unit that generates component information representing a relationship between the components based on the first signal, the second signal, and the analysis control information It is.
- the nineteenth aspect of the present invention is characterized in that, in the above aspect, the analysis control information includes information representing a classification of each of the plurality of constituent elements.
- the inter-signal information indicates a relationship between the first signal and the second signal based on the first signal and the second signal.
- An inter-signal information generation unit that generates a suppression coefficient generation unit that generates a suppression coefficient for suppressing a part of the plurality of components based on the first signal and the second signal;
- the component element information generation unit generates the component element information based on the analysis information, the inter-signal information, and the suppression coefficient.
- the twenty-first aspect of the present invention receives the first signal, the second signal including a plurality of components, and the analysis control information including information representing the relationship between the second signal, Based on the first signal, the second signal, and the analysis control information, a component information generation unit that generates component information representing a relationship between the components, the component information, and the analysis control
- a signal analysis control system comprising: a signal control unit that controls the first signal or the second signal based on information.
- a twenty-second aspect of the present invention is characterized in that, in the above aspect, the analysis control information includes information indicating a classification of each of the plurality of constituent elements.
- a computer includes a first signal, a second signal including a plurality of components, component information representing a relationship between the components, the components, and the components.
- the first signal or the second signal is controlled based on the processing to receive the analysis control information including information representing the relationship with the second signal, the component element information, and the analysis control information.
- a signal control program that executes signal control processing.
- the analysis control information includes information representing each classification of the plurality of constituent elements.
- the method includes a process of receiving rendering information for outputting the component to a plurality of output channels, and the component information and the analysis control in the signal control process.
- the first signal or the second signal is controlled based on information and the rendering information.
- the constituent element is based on processing for receiving signal control information representing a relationship between the plurality of constituent elements, the analysis control information, and the signal control information.
- Component information correction processing for correcting information, and controlling the first signal or the second signal based on the corrected component information and the rendering information in the signal control processing. It is characterized by that.
- the inter-signal information indicating the relationship between the first signal and the second signal based on the component element information and the signal control information;
- a suppression coefficient generation process for generating a suppression coefficient for suppressing a part of a plurality of components, a suppression coefficient correction process for correcting the suppression coefficient based on the signal control information, the inter-signal information, and the A component information correction process for correcting the component information based on the corrected suppression coefficient and the analysis control information.
- the corrected component information and the rendering signal Based on this, the first signal or the second signal is controlled.
- a suppression coefficient correction process for correcting a suppression coefficient based on the inter-signal information, the corrected suppression coefficient, and the analysis control information.
- the first signal or the second signal is controlled based on the corrected component information and the rendering signal.
- a computer includes analysis control information including a first signal, a second signal including a plurality of components, and information indicating a relationship between the second signal, And a component information generation process for generating component information representing a relationship between the components based on the first signal, the second signal, and the analysis control information.
- the analysis control information includes information representing each classification of the plurality of constituent elements.
- the inter-signal information indicates a relationship between the first signal and the second signal based on the first signal and the second signal.
- An inter-signal information generation process for generating a signal, and a suppression coefficient generation process for generating a suppression coefficient for suppressing a part of the plurality of components based on the first signal and the second signal The component element information generation process generates the component element information based on the analysis information, the inter-signal information, and the suppression coefficient.
- analysis control information including information representing a relationship between a first signal, a second signal including a plurality of components, and the second signal;
- Receiving component component information generation processing for generating component information representing the relationship between the components based on the first signal, the second signal, and the analysis control information, and the component
- a signal analysis control program for executing a signal control process for controlling the first signal or the second signal based on information and the analysis control information.
- the analysis control information includes information representing each classification of the plurality of constituent elements.
- the present invention can be applied to applications such as a device for performing signal analysis or control, a program for realizing signal analysis or control in a computer.
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Abstract
Description
通常、第一の関連技術のノイズサプレッサは、通信に利用される場合、符号化器の前処理として機能する。ノイズサプレッサの出力は符号化されて、通信路を伝送される。受信部では、信号が復号されて可聴信号が生成される。第一の関連技術のノイズサプレッサは、1入力の雑音抑圧システムであり、一般的に、抑圧しきれずに残留する残留雑音と、出力される強調音声の歪はトレードオフの関係にある。残留雑音を減らすと歪が増え、歪を減らすと残留雑音が増える。それぞれの利用者によって、残留雑音と歪のバランスの最適状態は異なる。しかし、ノイズサプレッサが符号化器の前にある、すなわち送信部にある構成では、利用者は残留雑音と歪のバランスを自分の好みに合うように調整することができない。
15 受信部
100 符号化部
101 信号分析部
102 多重化部
110, 111, 114, 120, 121, 171 変換部
112, 115 量子化部
113, 116 ダウンミックス部
122 分析情報計算部
150 復号部
151 出力信号生成部
152 分離部
160 逆量子化部
161, 173 逆変換部
172 信号制御部
200 信号間情報計算部
201, 202, 206, 207, 209, 210, 212, 213 抑圧係数計算部
203, 307 ゲイン逆変換部
204, 208, 211, 214, 220, 221, 222, 223 分析情報符号化部
205 スイッチ
300, 312, 316, 317, 320, 321, 322, 323 分析情報復号部
301, 304 レンダリング制御情報分離部
302, 303 レンダリング部
305, 313 ゲイン補正部
306 ゲイン変換部
308, 309, 314 サブゲイン補正部
310, 315 サブゲイン下限値修正部
311 サブゲイン下限値推定部
1300, 1301 コンピュータ
図1を参照し、本発明の信号分析制御システムの第一の実施の形態について詳細に説明する。本発明の信号分析制御システムは、送信部10と受信部15とが伝送路を介して接続された構成である。送信部10は、複数音源から構成される入力信号を複数受信し、伝送信号を出力する。伝送信号は、伝送路を介して、受信部15に入力される。受信部15は、伝送信号を受信し、複数または1つの出力信号を出力する。また、送信部、伝送路、受信部をそれぞれ、録音部、蓄積媒体、再生部としてもよい。なお、図1において入力信号の個数は簡単のため第一及び第二の入力信号の2個として説明する。
本発明の第二の実施の形態について説明する。第二の実施の形態は第一の実施の形態と比べて、分析情報計算部122と信号制御部172の動作が異なる。重複する部分の説明は省略する。
本発明の第三の実施の形態について説明する。第三の実施の形態は第一の実施の形態と比べて、分析情報計算部122と信号制御部172の動作が異なる。重複する部分の説明は省略する。
本発明の第四の実施の形態について説明する。第四の実施の形態は第一の実施の形態と比べて、分析情報計算部122と信号制御部172の動作が異なる。重複する部分の説明は省略する。
本発明の第五の実施の形態について説明する。第五の実施の形態は第一の実施の形態と比べて、分析情報計算部122と信号制御部172の動作が異なる。重複する部分の説明は省略する。本実施の形態は第一の実施の形態と比べて分析符号化情報の構成が異なることを特徴とする。
本発明の第六の実施の形態について説明する。第六の実施の形態は第二の実施の形態と比べて、分析情報計算部122と信号制御部172の動作が異なる。重複する部分の説明は省略する。本実施の形態は第二の実施の形態と比べて分析符号化情報の構成が異なることを特徴とする。
本発明の第七の実施の形態について説明する。第七の実施の形態は第三の実施の形態と比べて、分析情報計算部122と信号制御部172の動作が異なる。重複する部分の説明は省略する。本実施の形態は第三の実施の形態と比べて分析符号化情報の構成が異なることを特徴とする。
本発明の第八の実施の形態について説明する。第八の実施の形態は第四の実施の形態と比べて、分析情報計算部122と信号制御部172の動作が異なる。重複する部分の説明は省略する。本実施の形態は第四の実施の形態と比べて分析符号化情報の構成が異なることを特徴とする。
図34を参照して、本発明の第九の実施の形態を説明する。第一の実施の形態乃至第八の実施の形態まで、一方向通信のみを考慮してきた。すなわち、端末に内蔵された送信部から、別の端末に内蔵された受信部との間での通信について説明してきた。第九の実施の形態は、双方向の通信を考慮し、一台の送受信端末に本発明を適用した送信部と受信部との両方を内蔵しているものである。ここで送信部と受信部との両方を内蔵する本発明を適応した端末としては、第一の実施の形態乃至第八の実施の形態のいずれかの送信部および受信部を組み合わせて用いてもよい。本発明の第九の実施の形態では、送信部と受信部との両方を持つことにより、テレビ会議端末や携帯電話などの双方向通信に利用した際に、本発明の効果が得られる。
図35を参照して、本発明の第十の実施の形態に基づく信号処理装置を詳細に説明する。本発明の第十の実施の形態は、プログラム制御により動作するコンピュータ1300、1301から構成される。コンピュータは、中央処理装置、プロセッサ、データ処理装置のいずれでもよい。
Claims (33)
- 第一の信号と、複数の構成要素を含む第二の信号と、前記構成要素間の関係を表す構成要素情報と、前記構成要素と前記第二の信号との関係を表す情報を含む分析制御情報と、を受け、
前記構成要素情報と前記分析制御情報とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする信号制御方法。 - 前記分析制御情報は、前記複数の構成要素のそれぞれの分類を表す情報を含むことを特徴とする請求項1に記載の信号制御方法。
- 前記構成要素を複数の出力チャネルに出力するためのレンダリング情報を受け、
前記構成要素情報と前記分析制御情報と前記レンダリング情報とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする請求項1または請求項2に記載の信号制御方法。 - 前記複数の構成要素間の関係を表す信号制御情報を受け、
前記分析制御情報と前記信号制御情報とに基づいて前記構成要素情報を補正し、
前記補正された構成要素情報と前記レンダリング情報とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする請求項3に記載の信号制御方法。 - 前記構成要素情報と前記信号制御情報とに基づいて、前記第一の信号と前記第二の信号との関係を示す信号間情報と、前記複数の構成要素の一部を抑圧するための抑圧係数とを生成し、
前記信号制御情報に基づいて、前記抑圧係数を補正し、
前記信号間情報と前記補正された抑圧係数と前記分析制御情報とに基づいて、前記構成要素情報を補正し、
前記補正された構成要素情報と前記レンダリング信号とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする請求項4に記載の信号制御方法。 - 前記抑圧係数の下限値を生成し、
前記前記抑圧係数の下限値と前記信号制御情報とに基づいて、前記抑圧係数を補正し、
前記信号間情報と前記補正された抑圧係数と前記分析制御情報とに基づいて、前記構成要素情報を補正し、
前記補正された構成要素情報と前記レンダリング信号とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする請求項5に記載の信号制御方法。 - 第一の信号と、複数の構成要素を含む第二の信号と、前記第二の信号との関係を表す情報を含む分析制御情報と、を受け、
前記第一の信号と前記第二の信号と前記分析制御情報とに基づいて、前記構成要素間の関係を表す構成要素情報を生成する
ことを特徴とする信号分析方法。 - 前記分析制御情報は、前記複数の構成要素のそれぞれの分類を表す情報を含むことを特徴とする請求項7に記載の信号分析方法。
- 前記第一の信号と前記第二の信号とに基づいて、前記第一の信号と前記第二の信号との関係を示す信号間情報と前記複数の構成要素の一部を抑圧するための抑圧係数とを生成し、
前記分析情報と前記信号間情報と前記抑圧係数とに基づいて、前記構成要素情報を生成する
ことを特徴とする請求項7または請求項8に記載の信号分析方法。 - 第一の信号と、複数の構成要素を含む第二の信号と、前記第二の信号との関係を表す情報を含む分析制御情報と、を受け、
前記第一の信号と前記第二の信号と前記分析制御情報とに基づいて、前記構成要素間の関係を表す構成要素情報を生成し、
前記構成要素情報と前記分析制御情報とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする信号分析制御方法。 - 前記分析制御情報は、前記複数の構成要素のそれぞれの分類を表す情報を含むことを特徴とする請求項10に記載の信号分析制御方法。
- 第一の信号と、複数の構成要素を含む第二の信号と、前記構成要素間の関係を表す構成要素情報と、前記構成要素と前記第二の信号との関係を表す情報を含む分析制御情報と、を受け、
前記構成要素情報と前記分析制御情報とに基づいて、前記第一の信号または前記第二の信号を制御する信号制御部を備える
ことを特徴とする信号制御装置。 - 前記分析制御情報は、前記複数の構成要素のそれぞれの分類を表す情報を含むことを特徴とする請求項12に記載の信号制御装置。
- 前記信号制御部は、
前記構成要素を複数の出力チャネルに出力するためのレンダリング情報を受け、前記構成要素情報と前記分析制御情報と前記レンダリング情報とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする請求項12または請求項13に記載の信号制御装置。 - 前記複数の構成要素間の関係を表す信号制御情報を受け、前記分析制御情報と前記信号制御情報とに基づいて、前記構成要素情報を補正する構成要素情報補正部を備え、
前記信号制御部は、前記補正された構成要素情報と前記レンダリング情報とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする請求項14に記載の信号制御装置。 - 前記構成要素情報と前記信号制御情報とに基づいて、前記第一の信号と前記第二の信号との関係を示す信号間情報と前記複数の構成要素の一部を抑圧するための抑圧係数とを生成する構成要素生成部と、
前記信号制御情報に基づいて前記抑圧係数を補正する抑圧係数補正部と、
前記信号間情報と前記補正された抑圧係数と前記分析制御情報とに基づいて、構成要素情報を補正する構成要素補正部と
を備え、
前記信号制御部は、前記補正された構成要素情報と前記レンダリング信号とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする請求項15に記載の信号制御装置。 - 前記抑圧係数の下限値を生成する抑圧係数下限値生成部と、
前記前記抑圧係数の下限値と前記信号制御情報とに基づいて、前記抑圧係数を補正する抑圧係数補正部と
を備え、
前記構成要素情報補正部は、前記信号間情報と前記補正された抑圧係数と前記分析制御情報とに基づいて構成要素情報を生成し、
前記信号制御部は、前記補正された構成要素情報と前記レンダリング信号とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする請求項15に記載の信号制御装置。 - 第一の信号と、複数の構成要素を含む第二の信号と、前記第二の信号との関係を表す情報を含む分析制御情報と、を受け、
前記第一の信号と前記第二の信号と前記分析制御情報とに基づいて、前記構成要素間の関係を表す構成要素情報を生成する構成要素情報生成部を
備えることを特徴とする信号分析装置。 - 前記分析制御情報は、前記複数の構成要素のそれぞれの分類を表す情報を含むことを特徴とする請求項18に記載の信号分析装置。
- 前記第一の信号と前記第二の信号とに基づいて、前記第一の信号と前記第二の信号との関係を示す信号間情報を生成する信号間情報生成部と、
前記第一の信号と前記第二の信号とに基づいて前記複数の構成要素の一部を抑圧するための抑圧係数を生成する抑圧係数生成部と、
を備え、
前記構成要素情報生成部は、前記分析情報と前記信号間情報と前記抑圧係数とに基づいて、前記構成要素情報を生成する
ことを特徴とする請求項18または請求項19に記載の信号分析装置。 - 第一の信号と、複数の構成要素を含む第二の信号と、前記第二の信号との関係を表す情報を含む分析制御情報と、を受け、
前記第一の信号と前記第二の信号と前記分析制御情報とに基づいて、前記構成要素間の関係を表す構成要素情報を生成する構成要素情報生成部と、
前記構成要素情報と前記分析制御情報とに基づいて、前記第一の信号または前記第二の信号を制御する信号制御部と
を備えることを特徴とする信号分析制御システム。 - 前記分析制御情報は、前記複数の構成要素のそれぞれの分類を表す情報を含むことを特徴とする請求項21に記載の信号分析制御システム。
- コンピュータに、
第一の信号と、複数の構成要素を含む第二の信号と、前記構成要素間の関係を表す構成要素情報と、前記構成要素と前記第二の信号との関係を表す情報を含む分析制御情報と、を受ける処理と、
前記構成要素情報と前記分析制御情報とに基づいて、前記第一の信号または前記第二の信号を制御する信号制御処理と
を実行させることを特徴とする信号制御プログラム。 - 前記分析制御情報は、前記複数の構成要素のそれぞれの分類を表す情報を含むことを特徴とする請求項23に記載の信号制御プログラム。
- 前記構成要素を複数の出力チャネルに出力するためのレンダリング情報を受ける処理を含み、
前記信号制御処理において、前記構成要素情報と前記分析制御情報と前記レンダリング情報とに基づいて、前記第一の信号または前記第二の信号を制御することを特徴とする請求項23または請求項24に記載の信号制御プログラム。 - 前記複数の構成要素間の関係を表す信号制御情報を受ける処理と、
前記分析制御情報と前記信号制御情報とに基づいて、前記構成要素情報を補正する構成要素情報補正処理と、
を含み、
前記信号制御処理において、前記補正された構成要素情報と前記レンダリング情報とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする請求項25に記載の信号制御プログラム。 - 前記構成要素情報と前記信号制御情報とに基づいて、前記第一の信号と前記第二の信号との関係を示す信号間情報と前記複数の構成要素の一部を抑圧するための抑圧係数とを生成する抑圧係数生成処理と、
前記信号制御情報に基づいて、前記抑圧係数を補正する抑圧係数補正処理と、
前記信号間情報と前記補正された抑圧係数と前記分析制御情報とに基づいて、構成要素情報を補正する構成要素情報補正処理と、
を含み、
前記信号制御処理において、前記補正された構成要素情報と前記レンダリング信号とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする請求項26に記載の信号制御プログラム。 - 前記抑圧係数の下限値を生成する抑圧係数下限値生成処理と、
前記前記抑圧係数の下限値と前記信号制御情報とに基づいて、前記抑圧係数を補正する抑圧係数補正処理と、
前記信号間情報と前記補正された抑圧係数と前記分析制御情報とに基づいて、構成要素情報を補正する構成要素情報補正処理と、
を含み、
前記信号制御処理において、前記補正された構成要素情報と前記レンダリング信号とに基づいて、前記第一の信号または前記第二の信号を制御する
ことを特徴とする請求項27に記載の信号制御プログラム。 - コンピュータに、
第一の信号と、複数の構成要素を含む第二の信号と、前記第二の信号との関係を表す情報を含む分析制御情報と、を受ける処理と、
前記第一の信号と前記第二の信号と前記分析制御情報とに基づいて、前記構成要素間の関係を表す構成要素情報を生成する構成要素情報生成処理と
を実行させることを特徴とする信号分析プログラム。 - 前記分析制御情報は、前記複数の構成要素のそれぞれの分類を表す情報を含むことを特徴とする請求項29に記載の信号分析プログラム。
- 前記第一の信号と前記第二の信号とに基づいて、前記第一の信号と前記第二の信号との関係を示す信号間情報を生成する信号間情報生成処理と、
前記第一の信号と前記第二の信号とに基づいて、前記複数の構成要素の一部を抑圧するための抑圧係数とを生成する抑圧係数生成処理と、
を含み、
前記構成要素情報生成処理は、前記分析情報と前記信号間情報と前記抑圧係数とに基づいて、前記構成要素情報を生成する
ことを特徴とする請求項29または請求項30に記載の信号分析プログラム。 - コンピュータに、
第一の信号と、複数の構成要素を含む第二の信号と、前記第二の信号との関係を表す情報を含む分析制御情報と、を受ける処理と、
前記第一の信号と前記第二の信号と前記分析制御情報とに基づいて、前記構成要素間の関係を表す構成要素情報を生成する構成要素情報生成処理と、
前記構成要素情報と前記分析制御情報とに基づいて、前記第一の信号または前記第二の信号を制御する信号制御処理と
を実行させることを特徴とする信号分析制御プログラム。 - 前記分析制御情報は、前記複数の構成要素のそれぞれの分類を表す情報を含むことを特徴とする請求項32に記載の信号分析制御プログラム。
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