| 研究課題/領域番号 |
23K19121
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| 研究機関 | 京都工芸繊維大学 |
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研究代表者 |
ラジプット スディーシュ 京都工芸繊維大学, その他部局等, 特任研究員 (10874448)
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| 研究期間 (年度) |
2023-08-31 – 2025-03-31
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| キーワード | Phase measurement / Sound field imaging / Digital holography |
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| 研究実績の概要 |
We have improved reconstruction of voice data by using optical setup of parallel phase-shifting digital holography(PPSDH). I tried to record the multiple sound sources.
We explored existing system for an optical voice security of anticounterfeiting scheme that utilizes the optical recording of voice data using optical microphone based on PPSDH.
In an another direction, we developed a voice or acoustic signal authentication method based on similar concept by checking it with several recorded sound/voice sources. The proposed system is advantageous in testing different acoustic signals at 3D sensitive locations due to use of the holographic microphone recording.
Now we are constructing new setup to be used for proper separation and recording of multiple sound sources.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
We have improved reconstruction of voice data by using optical setup of parallel phase-shifting digital holography(PPSDH). I tried to record the multiple sound sources.
Progress is very close to what I planned because the system started to give preliminary results. From the constructed system, we explored anticounterfeiting and authentication of different sound signals. The PPSDH system has also been used for temperature tomography by measuring phase distribution and by use of computed model.
Tried to find out suitable filtering methods to be used for voice separation.
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| 今後の研究の推進方策 |
We plan to re-construct/modify existing setup by using some new advanced optical components for good recording of multiple sound sources. Planned and figured out deep learning or advanced filtering options are suitable to be used for proper separation.
Above steps may take 6 months in execution.
An alternative way to figure out different acoustic signal from recorded multiple sources could be through optical authentication. For that, we have also some testing and got some preliminary results of sound authentication by adding optical correlator in the system.
The new constructed optical setup will also be used to measure 3D phase distribution for temperature tomography.
Some non-interferometric algorithms will also be checked to measure 3D phase distribution.
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| 次年度使用額が生じた理由 |
We find out more appropriate optical system design that con be constructed by some modifications. Now, we are re-constructing optical setup that needs few additional optical components to be purchased. So, incurring amount will be used to buy some more components in addition to this year plan.
Also, it was not possible to send results in conference last year. So, I am sending results in conferences this year and will present results there. Therefore, some part of incurring amount will be used this year for presenting results in conferences.
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