| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2011: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2010: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2009: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
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| Research Abstract |
This project has established the design methodology for digital filters that makes analog performance optimal, based on sampled-data control theory. We have also successfully derived adaptation scheme for sampled-data filters. Major achievements include a) high-quality restoration from compressed audio sources, b) super-sonic reproduction from compact disc sources, c) a super-resolution method for image processing that reduces jaggy components, d) optimal construction of splines, e) design method for fractional-delay filters with applications to pitch-shifting. In particular, the algorithm is implemented into sound-processing LSI chips, and their cumulative production has reached 30 million chips. We have also placed an application to wavelets in a subsequent scope for the future.
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