| 摘要 |
<p>A television signal processing system includes a source (321) of video images for providing luminance and chrominance components of the video images by generating and putting out scan lines. The source (32) includes a low level horizontal domain detail processor (34) connected for boosting low level horizontal transitions of the luminance component put out by the source below a predetermined threshold level. The system typically includes a signal-degrading path (38) such as one characteristic of transmission or recording. The signal is passed through the degrading path (38) to a display unit. A line doubler (42) is preferably, although not necessarily, included in the display unit for doubling the number of decoded scan lines of the signal and for putting out scan line doubled luminance and chrominance components. A display image processor (44, 46, 48) is connected to the line doubler (42) and provides horizontal domain transition high level enhancement (46) for enhancing horizontal domain transitions having amplitudes above the predetermined threshold level. The display image processor further preferably includes vertical enhancement (48) for enhancing vertical domain transitions in accordance with predetermined vertical domain enhancement criteria, such as low level vertical detail boost and vertical contouring.</p> |
