Dvd Video Compression Technology And Laser Head

This paper introduces the process of Transform Coding and the principle of still picture & moving picture compression and the standards of JPEG/MPEG-2 and practical skill of the standards from the angle of the application and Network in the development of DVD in front. The rear expounds the working principle of Pick-up and the methods that are able to implement compatibility and fit high density disc. Moreover a devise idea is put forward that hologram incorporates object lens that can adapt to the Panasonic's Double focus and give credible technologic guarantee and carry out product's simplification.In the information society, the new technique come on constantly. It will tend to be variety and network on the development of DVD in the future. So it will be not enough using MPEG-2 only in the area of Digital Correspondence. Then the discovery of application for MPEG-4 or MPEG-7 is in the most urgent situation. However, the development of Digital Collective System must have attained high level, which includes optics,electronics and mechanics etc.by the progress of Compression Technique and HD Disc Technique.