2023 Fiscal Year Final Research Report
A modeling of spatial auditory masking in 3D audio field and its application to audio coding and enhancement for AR and VR
| Project/Area Number |
19K12021
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 61010:Perceptual information processing-related
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| Research Institution | Akita Prefectural University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
渡辺 貫治 秋田県立大学, システム科学技術学部, 准教授 (20452998)
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Keywords | 聴覚のマスキング効果 / 音響符号化 / 3次元音響 / イマーシブオーディオ / Virtual Reality / Augmented Reality / 空間的マスキング効果 |
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| Outline of Final Research Achievements |
Spatial auditory masking in the field of 3D audio has been thoroughly investigated. This involves the measurement of how a sound signal originating from a particular direction interferes with or 'masks' another sound signal emanating from a different direction. Various arrangements or frequency components in the sound signals were utilized for measurement purposes.
The results show interesting discoveries. When considering two sound signals located on the horizontal plane, it was observed that the level of masking threshold exhibits symmetry with respect to the frontal plane of the subjects. In other words, a sound signal originating directly in front of a subject not only masks signals originating nearby but also those coming from directly behind the subject.
Furthermore, when examining signals positioned at different elevations, it was noted that a sound signal emanating from above the subject's head tends to induce stronger masking effects compared to signals from other directions.
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| Free Research Field |
音声音響信号処理
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| Academic Significance and Societal Importance of the Research Achievements |
従来,音響符号化において,聴覚のマスキング効果は主に周波数軸上のそれが利用されてきた。一方,全天球から到来する音が相互にどのように影響しあうのかを明らかにすることは,今後普及が進むであろう3次元音響やイマーシブオーディオの伝送や再生に大きな役割を果たすと考える。とくにその符号化やレンダリングにおいて,伝送情報量や処理量などのリソースの優先順位をつけるうえで欠かせない情報となる。受聴者にとって重要な情報を優先して伝送,再生することで,限られた資源のなかでより高い臨場感を得ることが出来るようになると考える。
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