论文部分内容阅读
时下,人们对市场上不断出现的视频设备,如VCD、SVCD、DVD等等,经常会提到一个技术指标——清晰度。如电视机(PAL制)的清晰度为437×583,DVD影碟为576×720。这个指标可以直观反映图像的质量,彩电的清晰度之所以小于DVD影碟,是受到目前模拟彩电技术中诸如扫描行数,信号通道带宽以及行频等因素的限制,如果您要使DVD影碟高画质图像再现,利用家用电脑所用的VGA彩显代替彩电就可实现。 在计算机领域,无论是硬件、软件还是外设技术,发展都非常快。尤其在显示器方面,目标朝向高清晰,高分辩率,它的发展是与计算机同步的。可以说正是由于家用电脑的普及,促进了高画质彩显的发展,它从80年代初的CGA、EGA,发展到目前的VGA、SVGA,
Now, people on the market constantly emerging video equipment, such as VCD, SVCD, DVD, etc., often referred to a technical indicator - clarity. Such as television (PAL system) definition of 437 × 583, DVD video is 576 × 720. This indicator can directly reflect the quality of the image, the clarity of color TV is less than the DVD video, is subject to the current analog color TV technology, such as the number of scan lines, signal channel bandwidth and line frequency and other factors, if you want to make high-definition DVD video Quality image reproduction, the use of home computer VGA color display instead of color TV can be achieved. In the computer field, whether it is hardware, software or peripheral technology, the development is very fast. Especially in the display area, the target is high definition and high resolution, and its development is synchronized with the computer. It can be said precisely because of the popularity of home computers to promote the development of high-definition color display, which from the early 80’s CGA, EGA, the development of the current VGA, SVGA,