如今,科技发展日新月异,新型家电层出不穷,生活日用家电更新换代越来越快。据有关专家预测,随着下个世纪的到来,有四种家电将开始流行。电脑电视它既是一台功能毫不逊色且有较高清晰度的电视(分辨率达700线),同时又是一台操作简单、功能比较齐全的电脑。那时,买一台25时的高清晰度电脑电视的价格不超过1万元,既便宜又实用。为充分发挥电脑显示器的性能,这种电脑电视对接收扫描电路进行了改进设计,变隔行扫描为逐行扫描,电视屏幕闪烁就不会太强,可近距离观看或操作。DVD机它被科学家们称为“21世纪的高科技产品”,是近年来美国、日本等国研制开发的一种高密度数字影碟机。它在VCD基础上采用更为先进的技术对图像进行压缩和解压缩,使记录密度大大提高,一张影碟通常可放映135分钟,而VCD只有74分钟。另外,由于DVD影碟采用特殊材料制成,其放映的图像质 Nowadays, with the rapid development of science and technology, new types of home appliances emerge in an endless stream, and daily household appliances are getting faster and faster. According to the prediction of relevant experts, with the arrival of the next century, there will be four types of home appliances that will become popular. Computer TV It is not only a TV with a good function and high definition (with a resolution of 700 lines), but also a computer with simple operation and complete functions. At that time, the price of buying a 25-hour high-definition computer TV was no more than 10,000 yuan, which was both cheap and practical. In order to give full play to the performance of computer monitors, such computer televisions have improved the design of the receiving scanning circuit, and the interlaced scanning is progressive scanning. The television screen will not be too flickering and can be viewed or operated at close range. The DVD player is known by scientists as “high-tech products in the 21st century” and is a high-density digital video player developed by the United States, Japan, and other countries in recent years. It adopts more advanced technology on the basis of VCD to compress and decompress the image, so that the recording density is greatly improved. A video disc can usually be displayed for 135 minutes while the VCD is only 74 minutes. In addition, since DVDs are made of special materials, the quality of their images