June 30, 1997
Self-contained "Progressive LSI" Developed by Hitachi for High Picture Quality Signal Conversion- Universal application is possible for broad range of display devices from TVs to plasma displays with high picture quality motion picture -Motion picture infrastructures are undergoing major changes, in converting from analog to digital format, spurred by the start of data broadcasting, digital satellite broadcasting, and the increased penetration of PCs into ordinary households. The proliferation of video signal formats is generating a demand for display devices that can handle high-definition resolutions and PC display formats as well as NTSC. At the same time, the development of display devices requires the appropriate signal conversion technology to match those of fixed-pixel displays such as LCDs and plasma displays. The Progressive LSI can convert a standard NTSC interlaced-scanning(*) TV signal into a progressive-scanning(**) signal, using subsampling motion adaptive scanning interpolation(***) technology, which produces high picture quality. The Progressive LSI offers a high level of format cross-conversion flexibility that enables outputs to be matched to display device capabilities. An NTSC TV signal, for example, can be displayed on a PC screen, or a high-definition signal or a PC video signal such as VGA or SVGA can be displayed on a standard CRT, LCD or plasma display. The chip has a scaling function that enables the size of a picture to be varied from x1/5 to x256, horizontally and vertically, and moved to any position. It also features an adaptive enhancer function that emphasizes the outline of screen images according to the scaling ratio, thus making the picture seem more real. Hitachi will incorporate this key device for the multimedia age in, first of all, a wide-screen TV to be released this fall, then in liquid-crystal and plasma display products to follow.
*Interlaced scanning
**Progressive scanning
***Subsampling motion adaptive scanning interpolation Subsampling motion adaptive scanning interpolation utilizes both the preceding field signal and the current field signal for still pictures, which minimizes picture quality degradation caused by the conventional systems and halves the required memory capacity.
Specifications of Progressive LSI
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