| 摘要 |
PURPOSE: A 3-mode feedback method for obtaining a high definition digital image is provided to effectively remove digitizing and white noise and to improve image quality lost by a shaking phenomenon during frame and line scanning. CONSTITUTION: A 3-mode feedback apparatus filters a digital image signal inputted by a digital comb filter1 (DCF1), performs shaking, depressing dynamic 2K (Right-Left edges) (dD2K) and gamma correction, and synchronizes a corrected signal. The 3-mode feedback apparatus stores a synchronized signal in each of a graphic memory1 (GM1) and a graphic memory2 (GM2), filters a signal stored in the GM2 by a digital comb filter2 (DCF2), filters an inputted signal from a graphic memory3 (GM3) which stores the signal filtered by the GM1 and the DCF2 by a digital comb filter3 (DCF3) and synchronizes the signal filtered by the DCF3. The 3-mode feedback apparatus mixes and outputs synchronized signals.
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