论文部分内容阅读
14年来,直径5时的CD逐渐发展成CD-ROMVCD等,但它们区别只是记录内容的变化,而容量直保持在640MB,到了DVD才开始出现突破。DVD一诞生就拥有4.7GB的容量,即等于CD记录容量的七倍,可记录133分钟的图像和AC-3多声道信息。随后,其容量将增加一倍,接着还会增至四倍,即17GB(1GB=1000MB),也就是说,在一张DVD上可以录入相当于25张以上的CD或VCD的内容。DVD虽然也
In the past 14 years, CDs with a diameter of 5 have gradually developed into CD-ROMVCDs, but the difference between them is only the change of recorded contents. While the capacity is kept at 640MB, a break has started to occur in DVDs. The birth of a DVD has a capacity of 4.7GB, which is equivalent to seven times the CD recording capacity, can record 133 minutes of images and AC-3 multichannel information. After that, it will double in capacity and then quadruple it to 17GB (1GB = 1000MB), which means that you can record 25 or more CDs or VCDs on one DVD. DVD though