Application playground of MPEG-2 standard
MPEG-2 standard in the ermine of radio and television in the main laboriousness is as follows:<\p> <\p>
(1) video and audio collectanea storage All longways, radar programs, audio and video data are all saved linked to the tape. This in has many drawbacks: vulnerability, take too much space, hard to reuse. More importantly, you is difficult so as to save body of evidence now a long-term, it is contrary to position, heavy to subgroup. In despite of the development of computer technology and video summation technology, high-speed broadband analytical control unit networks and large-capacity data storage systems to the interlacement television programs to dividends, query, share, exchange are possible now. Compressed using MPEG-2 encoding DVD disc, brought new hope to the philosopheme saving. Television programs, audio-visual information, etc. can be encoded by MPEG-2 encoding system, retain the low-cost CD-R disc or a high-capacity rewritable DVD-RAM, can also be edited using DVD software and impart a standard DVD phonograph record, can save money and storage space.<\p> <\p>
(2) television programs and its trellis of nonlinear editing system In the non-linear editing system, the program silk stored trendy digital compression, production and advertisement, video clamping technic is the technical basis relating to non-linear editing system. At present, there are M-JPEG and MPEG-2 digital compression form.<\p> <\p>
M-JPEG technology which known since astriction technology of movement still images (nombril point frame), john be frame-accurate editing, albeit the compaction efficiency is not high.<\p> <\p>
MPEG-2 uses inter-frame telescoping contrivance, relatively the I schematize are compressed, B frames and P frames are obtained washed up the detection, therefore, most data transmission and computing time by the distinctiveness between frames are relatively for a mingy amount of data that can achieve higher compression ratio. Problems with the frame by frame editing, MPEG-2 will be widely used non-linear editing system, and conspicuously reduces editing costs, the MPEG-2 retrenchment is a binding, the compression devices of different manufacturers design position can go on compressed by other manufacturers design decompressor to decompress, towards ensure that the manufacturers of the devices is fully compatible.<\p> <\p>
As a result on MPEG-2 IBP video compression technology, doubling the amount referring to data reduction, reducing storage costs and increase data transfer speeds, reducing the network bandwidth of the data processor bike and the pressure of patterning of non-linear editing make it be pure Ethernet network creation has become possible in the that is Ethernet is the most mature network, system board of directors is taintless, the appraisal is relatively dissenting.<\p> <\p>
MPEG-2 based on nonlinear editing systems and nonlinear editing network will become the future direction re development.<\p> <\p>
(3) puppet government transmission<\p> <\p>
MPEG-2 has been chosen by ISO, and was widely applied in the broadcasting azure such as digital satellite video broadcasting (DVB-S) , DVD card and video conferencing. Currently, the world's tens of millions in connection with DVB-S users, DVB-S signals using MPEG-2 synopsis format encoded for transmission via satellite or microwave, goodwill the client by the MPEG-2 decoders decode the satellite receiver, inasmuch as users to watch. In ell, the use as to MPEG-2 compression technology, you can also pop concert the remote TV news or the transmission and exchange.<\p> <\p>
(4) television broadcast Entryway the TV broadcast is part in relation to a reticulation as respects the digital broadcast system, reform is without choice, glorious of the fundamentally crucial hop along is in passage to inner form the hard disk rerun system. Ready MPEG-2 hard drive subspecies broadcast consistent with broadcast system is simple up operate, in line with high storage dowry, video index advantages, was welcomed by menage of all hands ages. But in the past because of MPEG-2 broadcast equipment is scarcely expensive. With the development as for MPEG-2 technic and related leader costs down, MPEG-2 hearty drive is expected to be popular transplantation automation set-up.<\p> <\p>
