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1.创作:对DVD盘片的内容,你可以处理来源于不同地方的各种输入媒体。程序信息被压缩成一个MPEG-2数据流。 2.格式编码:在创作过程中,DVD数据流要根据DVD的标准按照“只读光盘”1.0版进行编码。 3.基底准备:在DVD盘的制作中,凹坑的几何形状的准确性是至关重要的。为了实现这一点,使用一种表面涂有粘合剂的玻璃为基底,另外在粘合剂外还涂有一层“感光剂”。 4.录制:在激光束记录器中,涂有“感光剂”的玻璃在激光束的照射之下曝光,根据DVD盘片所携带的信息密度,要给光学系统指定不同的激光光波和更高的数字孔径。这样便导致了更小、更集中的信息凹坑,因此DVD要求更高的聚焦准确性。
1. Creation: For DVD disc content, you can handle a variety of input media from different places. Program information is compressed into an MPEG-2 stream. 2. Formatting: During the authoring process, the DVD data stream should be encoded according to the DVD standard according to the “CD-ROM” version 1.0. 3. Substrate preparation: In the manufacture of DVD discs, the accuracy of the geometry of the pits is of crucial importance. To do this, use a glass with an adhesive coated on it and a layer of “sensitizer” in addition to the adhesive. 4. Recording: In a laser beam recorder, the glass coated with “sensitizer” is exposed by the laser beam. Depending on the density of information carried by the DVD disc, different laser light waves are required to be given to the optical system and higher Digital aperture. This results in smaller, more focused information pits, so DVDs require higher focus accuracy.