Mpeg-2 Magneto-optical Disk Digital Video Recorders

MPEG-2(Moving Pictures Experts Group-2) is the standard of moving picture and accompanying audio, It is compose of the system of MPEG, the vedio of MPEG, the audio of MPEG.the transfer ratio of compressing data is ten Mbps.It is an expansion and amelioration basing on MPEG-1,Now it is using in BSS(Broadcasting satellite Service to The Home), DTTB(Digital Terrestrial Television Broadcast), EC(Electronic Cinema), ENG(Electronic News Gathering), IPC(Inter Personal Communication), MMM(Multimedia Mailing), NDB(Networked Database Service )and VOD(.Video-On-Demand).This task about "digital magnetic-optical (MO) disk videocorder" basing on MPEG-2, the machine adopted the advanced photoelectrinicity recording technology and realized the real-time and high speed data collection, data compressing, data encoding of color moving pictures, data storage used compact disc and image playback. Its storage medium is magnetic-optical disk(MO).It conquers many disadvantages of analog video recorder and accomplishes the real-time recording of video and audio data, the data may be played back infinitely, its quality of image is equal to VHS recorder and the playback of CD-ROM and the sound level of CD. Because of adopting digital encoding of video and audio and using magnetic-optical disk as recording medium, it possess not only the properties of high recording density, huge storing volume, long preserving time, higher reliability, writing and erasing, the recording medium being able to be discharged but also its data formatting compatible with computer, so its recording data may also be played back, transmitted and other disposed by computer.The quality of video and audio of digital magnetic-optical disk recorder arrive to the quality of MPEG-2.This paper will discuss some aspects of digital magnetic-optical disk recorder and the soft programming.