The selective purchase of the car DVR
The selective purchase of the car DVR
The digital car monitoring system is composed of car dvr recorder, video camera, monitor and transmission line. The video camera will capure the video signal in the car. The image signal will be transmitted to the car dvr through the video coaxial-cable. The dvr recorder will compress and save the signal in the hard disk as to the setting compression format. At the same time, the dvr can transmitt the video signal to the monitor as to the selected compound modes.
The technical aspects of the car DVR
The car dvr belongs to the traditional embedded dvr segment market. It’s a new product developed along with the digital video and audio coding. The car DVR integrates the digital video and audio coding, large capacity data hard disk storage, wireless video transmitting and GPS satellite technology. It realizes the audio and video monitoring in the passenger transport, special vehicle industry as well as other fields.
At present, the AV standard algorithms used by the car dvr manufactuers are MPEG-2, MPEG-4, H.264 and MJPEG. The MPEG-2 and MJPEG have a low compression rate. The H.264 coding algorithm features with high video compression, low bit rate, low bandwidth and adaptability. Along with the improvement of the recorder resolution, the digital coding performance is upgraded from CIF(352*288) to 2CIF(704×288), DCIF(528×384),D1(704×576).
The dvr shockproof technology is the key technology of the car DVR. It’s the difference between the car dvr and the traditional embedded dvr. The traditional shockproof technology generally uses the mechanical method to suspend it in the special shockproof machine. The shock absorber absorbs the vibration and impact energy. The magnetic head will not be affected by the mechanical vibration.
Furthermore, some manufacturers choose the electronic shock absorber solution. Some car DVR adds the customized functions like GPS satellite locating, car information recording and media player based on the recording function.
Generally speaking, we judge the car DVR based on the stability, shockproof ability, thermal stability and miniaturization. However, the different selected models have different functions. The car DVR has the following functions.
1. The professional power supply design. It meets the needs of the working environment of the large supply voltage fluctuation and electric pulse strike.
2. Professional shockproof design. It’s lockable and movable. It can provide the convenient data backup function.
3. The embedded operation system. It’s stable and hard crash machine.
4. It supports multiplex audio and video input. The real time monitoring and recording are realized.
5. Video recording and quick checking functions.
6. It has the video loss alarm function.
7. It supports the large capacity hard disk. It’s plug and play.
Except for the basic functions, the car dvr should have the powerful expansibility. It can provide different expanding functions as to the user’s needs. It can record the driving process. The real time and two way information transmitting function can help you realize the monitoring management. The car entertainment function can realize the video playback. It can be used to broadcast the advertisement and recreation program.
Tracy is from chinazrh, an excellent china wholesale electronics supplier, which serves you the best wholesale consumer electronics including the car dvr recorder. Welcome to find more information about the car dvr recorder you need and welcome your valuable suggestions.
Article from articlesbase.com
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