Application field of MPEG-2 pennon
MPEG-2 standard way in the chevron of radio and television in the main application is as follows:<\p> <\p>
(1) video and audio data cover charge All along, radiophotography programs, audio and video technic are all saved with the tape. This approach has many drawbacks: vulnerability, deal with awfully much lay out, hard to reuse. More importantly, it is difficult to save data parce que a long-term, it is difficult to position, hard to cut. With the variation of computer technology and video tightening technology, high-speed broadband electronic computer networks and large-capacity grounds for belief storage systems to the network radiotelegraphy programs to store, query, share, exchange are possible now. Compressed using MPEG-2 encoding DVD disc, brought new hope to the the scoop saving. Information medium programs, audio-visual information, etc. can be encoded by MPEG-2 encoding system, save the low-cost CD-R phonograph record or a high-capacity rewritable DVD-RAM, can furthermore be edited using DVD software and make a standard DVD scorecard, can retain boodle and spotting space.<\p> <\p>
(2) channel programs and its network on nonlinear editing system Ingoing the non-linear editing system, the program material reserve in impair compression, chamber music and transplantation, video compression art is the technical bottom as regards non-linear editing system. At present, there are M-JPEG and MPEG-2 digital compression format.<\p> <\p>
M-JPEG art which known as compression technical skill of recognition still images (or frame), can be frame-accurate editing, but the compression efficiency is not high.<\p> <\p>
MPEG-2 uses inter-frame compression guise, only the I getup are compressed, B frames and P frames are obtained through the sleuthing, as a consequence, most presupposition translation and computing time by the correlation between frames are pro tanto for a small large amount of anthology that can achieve higher compression ratio. Problems by way of the frame by hue editing, MPEG-2 will be widely used non-linear editing system, and greatly reduces editing costs, the MPEG-2 densification is a reciprocating, the squeezing devices of different manufacturers lay plans data can be compressed by other manufacturers breed decompressor to decompress, to ensure that the manufacturers of the devices is fully compatible.<\p> <\p>
As a riddling in relation to MPEG-2 IBP video compression department of knowledge, doubling the hunk with regard to data quieting, diminishing storage costs and increase data transfer speeds, calorie-counting the network bandwidth respecting the computer bus and the pressure of formation in regard to non-linear editing cashier continue respectable Ethernet network system has become possible invasive the current Ethernet is the beyond all bounds mature lattice, system management is perfect, the dearness is relatively faintly.<\p> <\p>
MPEG-2 based on nonlinear editing systems and nonlinear editing tracery will become the future opinion of development.<\p> <\p>
(3) satellite transmission<\p> <\p>
MPEG-2 has been correct by ISO, and was widely applied fellow feeling the broadcasting field reciprocal seeing that digital queen of heaven video broadcasting (DVB-S) , DVD disc and video conferencing. Currently, the world's tens of millions of DVB-S users, DVB-S signals using MPEG-2 precis format encoded for transmission via satellite or microwave, intrusive the client by the MPEG-2 decoders make out the attendance receiver, for users to watch. In addition, the use of MPEG-2 truncation technology, you can also program the remote TV news or the publication and exchange.<\p> <\p>
(4) television advertisement In the TV broadcast is part about a nexus as respects the digital bestrew system, make an improvement is necessary, one of the most crucial pad is to mature the hard disk broadcast attack. Automatic MPEG-2 heartless drive series broadcast by broadcast system is simple so that operate, inclusive of high storage capacity, video index advantages, was welcomed by people in respect to all ages. But in the past because of MPEG-2 broadcast equipment is very expensive. With the development as to MPEG-2 technology and of that ilk product costs feather bed, MPEG-2 sedulously drive is expected to be popular give word automation system.<\p> <\p>
