| Project/Area Number |
18K11370
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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 | University of Fukui |
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Principal Investigator |
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2020: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2019: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 動画像符号化 / 高フレームレート / 時空間画質 / 画質制御 / レート制御 / 主観評価値 / MOS / フレームレート |
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| Outline of Final Research Achievements |
Very high frame-rate videos, running upto 240 frame/s, require a maximization of video quality for a transmission / storage within a prescribed band width. This study extends and applies the spatio-temporal rate control technique for videos based on a maximization of their predicted subjective quality metric, developed previously by the author, and validates the effectiveness of the approach. The results of this study have suggested that 240 frame/s is not always necessary in preserving the total video qulity, which can drastically improved by applying the spatio-temporal adaptive rate control technique. They also have indicated that the proposed technique can precisely and effciently realize the video quality maximization.
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| Academic Significance and Societal Importance of the Research Achievements |
動画像の高画質化は，これまで主に画素数の拡大方向に進んでおり，4Kや8K画像が身近となりつつある一方で，今後は時間方向の高フレームレート化も進むと予想される．高精細かつ240フレーム／秒に達する超高フレームレート動画像をネットワーク伝送あるいは保存する際は，高画質性を保った上で巨大なデータ量を削減する効率的なデータ圧縮・制御手法が不可欠である．本研究では，ビデオシーン単位の最適なフレームレート予測に基づく効率的な画質制御手法を検討・提案し，高画質動画像に対するデータ制御法への貢献を目的とする．
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