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AUDIO SIGNAL PROCESSING DEVICE, AUDIO SIGNAL PROCESSING METHOD, AND AUDIO SIGNAL PROCESSING PROGRAM commons meetings

Foreign code F170009288
File No. (H27-G09)
Posted date Nov 14, 2017
Country WIPO
International application number 2017JP016019
International publication number WO 2017188141
Date of international filing Apr 21, 2017
Date of international publication Nov 2, 2017
Priority data
  • P2016-089417 (Apr 27, 2016) JP
Title AUDIO SIGNAL PROCESSING DEVICE, AUDIO SIGNAL PROCESSING METHOD, AND AUDIO SIGNAL PROCESSING PROGRAM commons meetings
Abstract An audio signal processing device according to one embodiment is provided with an acceptance unit for accepting audio signals of a plurality of channels, a division unit for dividing the audio signal of each channel into a coherent component and a field component, and an output unit for outputting the coherent component and field component of each channel. In the dividing process, an estimated signal having highest correlation with the audio signal of a channel to be processed among estimated signals calculated using at least the audio signal of other than the channel to be processed, is extracted as the coherent component of the channel to be processed. Then, a difference of the audio signal of the channel to be processed and the coherent component is extracted as a field component.
Scope of claims [claim1]
1. The acceptance section which accepts the audio signal of the plural channels and,
The aforementioned audio signal is divided with into the coherent component and the field component concerning each channel, executes the split application which being the divided section which, the aforementioned split application,
When one aforementioned channel which becomes the object of the aforementioned split application is designated as the object channel, using the aforementioned audio signal of the channel other than the said object channel at least, the step which extracts the presumption signal whose correlation with the aforementioned audio signal of the inside said object channel of the presumption signal which is calculated is highest as the aforementioned coherent component of the said object channel and,
The aforementioned audio signal of the aforementioned object channel and the step which extracts the finite difference of the aforementioned coherent component of the said object channel as the aforementioned field component of the said object channel
It includes, the said divided section and,
The output section which outputs the aforementioned coherent component and the aforementioned field component of each channel which is extracted by the aforementioned divided section
The audio signal processing device which it has.
[claim2]
2. The aforementioned split application,
The step which executes the processing which divides the audio signal in the plural frames making use of window function concerning each channel and,
The step which executes the processing which forms plural aforementioned blocks by the fact that the processing which at least collects two which it continues aforementioned frames to one block is executed vis-a-vis the whole of the aforementioned plural frames concerning each channel and,
The step which extracts the aforementioned coherent component of the aforementioned object channel the aforementioned block in respectively
It includes,
In claim 1 audio signal processing device of statement.
[claim3]
3. The aforementioned divided section,
By the fact that the audio signal of each channel is divided into the plural sub bands, the step which forms the plural sub band signals concerning each channel and,
The step which extracts the coherent component of the aforementioned object channel the aforementioned plural sub bands in respectively and,
The step which extracts the coherent component of the aforementioned object channel by the fact that the coherent component in the aforementioned plural sub bands is added
It includes,
In claim 1 or 2 audio signal processing device of statement.
[claim4]
4. The audio signal processing device, the acceptance step which accepts the audio signal of the plural channels and,
The aforementioned audio signal processing device, the aforementioned audio signal is divided with into the coherent component and the field component concerning each channel, executes the split application which being the divided step which, the aforementioned split application,
When one aforementioned channel which becomes the object of the aforementioned split application is designated as the object channel, using the aforementioned audio signal of the channel other than the said object channel at least, the step which extracts the presumption signal whose correlation with the aforementioned audio signal of the inside said object channel of the presumption signal which is calculated is highest as the aforementioned coherent component of the said object channel and,
The aforementioned audio signal of the aforementioned object channel and the step which extracts the finite difference of the aforementioned coherent component of the said object channel as the aforementioned field component of the said object channel
It includes, the said divided step and,
The aforementioned audio signal processing device, the output step which outputs the aforementioned coherent component and the aforementioned field component of each channel which is extracted in the aforementioned divided step
The audio signal processing method of including.
[claim5]
5. The acceptance step which accepts the audio signal of the plural channels and,
The aforementioned audio signal is divided with into the coherent component and the field component concerning each channel, executes the split application which being the divided step which, the aforementioned split application,
When one aforementioned channel which becomes the object of the aforementioned split application is designated as the object channel, using the aforementioned audio signal of the channel other than the said object channel at least, the step which extracts the presumption signal whose correlation with the aforementioned audio signal of the inside said object channel of the presumption signal which is calculated is highest as the aforementioned coherent component of the said object channel and,
The aforementioned audio signal of the aforementioned object channel and the step which extracts the finite difference of the aforementioned coherent component of the said object channel as the aforementioned field component of the said object channel
It includes, the said divided step and,
The output step which outputs the aforementioned coherent component and the aforementioned field component of each channel which is extracted in the aforementioned divided step
The audio signal processing program which is made to execute to the computer.
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • UNIVERSITY OF TOYAMA
  • Inventor
  • ANDO AKIO
IPC(International Patent Classification)
Specified countries (WO2017188141)
National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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