Position:2, digital video supervisory system
Supervisory system of video of the development that compresses technology of encode technology, network news report as multimedia technology, video, number rises abruptly quickly, there is kind of supervisory system of video of two kinds of numbers on nowadays market, one kind is the video supervisory system that is core with digital kinescope equipment, another kind is with embedded the video supervisory system that video Web server is core.
It is increasingly mature that digital video compresses encode technology, of the computer gain ground change, created a condition to be based on the multimedia monitoring of the PC. Rise abruptly quickly of supervisory system of this kind of new-style video, partial ground was replaced break up with video matrix image implement, videocorder is core, complementary the mode of imitate video monitoring with other transport, main show is in its advantage: The multimedia monitoring lead plane of A, PC is integrated video matrix, image is broken up implement, videocorder the numerous function that wait, make construction of system simplifies greatly. B, because use computer network technology, monitoring of subsidiary channels in the human body through which vital energy does not suffer digital multimedia telenet distance limitation. C, because use array of high capacity disk to save file to disk implement or CD memory, can save many tape medium, be helpful for a system realizing multimedia information to inquire at the same time.
But the development as the system of video monitoring kinescope that is based on a PC, in actual project use process, also expose an a few inadequacy, basically be the instability that the system works. The compositive structure of the system of video monitoring kinescope that is based on PC is: Compatible / labour accuses a PC video collects card common / more reliable operation platform application software. From systematic composition the structure analyses: A, PC is used at 24 hours of uninterrupted jobs, its function is very not stable, labour accuses what the PC has a class to go up relative to the stability of compatible PC to rise, apply to more complex work environment. B, operating system: It is the system that operates platform with Windows 98, the personage inside course of study knows, the stability of Win98 has particular problem, if at the same time application software is not very normative, the job appears in using a process easily so the problem such as not stable, dead machine, and the system of video monitoring kinescope that is based on a PC the implementation of its software is to be on the current operating system such as Windows 95/98/NT, Unix, Linux, at the same time application software and systematic file, image file store go up in hard disk, video is handled must high density inputs mass data, at the same time hard disk should undertake multitask works, common hard disk is logistic (the FAT32 that is like Windows) already cannot suit, as a result produces systematic instability extremely easily, create dead machine appearance. C, application software: The system that uses simple and easy application software cannot defend a domain with Yu An quite, much task should support on the application software ability of video supervisory system intercurrent processing, like surveillant, kinescope, time put, backup, call the police, control, long-range join multitask handles ability. D, video collects card: System of video monitoring kinescope all inputs a system for multichannel normally, video collects card to be able to use many calories of means, also can use sheet to block way. Say commonly, only card means is compositive degree tall, stability is met means of excel much card, a lot of use all the way a calorie means forms hardware very easily to conflict, its stability can have bigger effect.
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