An Overall Knowledge of Mobile DVR

Basics of SD Card Mobile DVR

The mobile DVR belongs to the traditional embedded DVR market segments, it is an emerging specialty products developed for vehicle applications as digital video and audio encoding technology. It uses the embedded processor and embedded operating system, and combines with the latest H.264 video and audio compression or decompression technology, GPS global positioning technology, 3G wireless communication technology, USB communication technology, advanced vehicle power management technology and GIS geographic information technology, it is suitable for all kinds of car models for 24-hour surveillance. Audio and video sync video, global positioning, wireless audio and video real-time transmission are available, at the same time, the host set aside a variety of interfaces, it can connect with the car display, IC card-board machine, signal priority control systems and passenger car statistical system devices. Nowadays, SD Card Mobile DVR are widely used in mobile transports such as public transport, long-distance passenger transport, tourist bus, logistics and freight forwarding, police enforcement vehicles, trains, subways, ships, aircraft and so on.

Storage Mode of Mobile DVR

At present, the mobile DVR has three storage means, they are hard disk, U disk and SD card. By comparison, reliability of U disk is higher. 1, U disk has no mechanical moving parts, low power consumption, you can use in the severe and harsh power environment. In these car, the ordinary SD card mobile DVR cannot work properly; 2, Convenient transcription data, the U disk can be directly plugged into the computer USB interface, you can playback video, save video and without hard disk connector and USB adapter, easier operation; 3, U disk interface design is suitable for repeated mating and more reliable than the SD card. SD card interface is the interface equipment, it is not suitable for regular plug and the damage rate is quite high.

Wide Application of Mobile DVR

So far, the video and audio codec algorithms of most mobile DVR manufacturers choose are: MPEG-2, MPEG-4, H.264, MJPEG, etc., among them, compression ratio of MPEG-2 and MJPEG is low, seldom use in usual time; while the H H.264 encoding algorithm has the characteristics of high video compression rate, low stream, wireless networks low bandwidth adaptability it is now the optional compression format direction of mobile DVR. Mobile DVR, with the increase degree of social recognition, the requirements of a variety of different mobile DVR levels also appear. With the constant improvement of its function, its application scope will become an increasingly widespread and growing role, it will not only used in the long-distance bus, but also will be widely used in common buses. mobile digital video recorder will play an important role for the civilized life in the society.

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