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引言数字录像机的发展已有十几年的历史。早在1987年和1988年,索尼公司分别发表了3/4英寸D1格式数字分量录像机及D2格式数字复合录像机。1990年及1993年松下公司又分别发表了D3格式1/2英寸数字复合录像机及D5格式1/2英寸数字分量录像机。它们都有很高的图像及声音质量,多代复制能力很强,但由于其生产和使用成本非常昂贵.无法得到普及。随着数字压缩技术的突破性进展及纠
Introduction The development of digital video recorders has more than ten years of history. As early as 1987 and 1988, Sony Corporation respectively published 3/4 inch D1 format digital component video recorder and D2 format digital composite video recorder. In 1990 and 1993, Matsushita also released the D3 format 1/2-inch digital composite video recorder and the D5 format 1/2-inch digital component video recorder respectively. They have a high image and sound quality, strong multi-generation copy capabilities, but because of its production and use of the cost is very expensive and can not be universal. With the digital compression technology breakthroughs and correction