Mobile Digital video recorder (DVR) is the most common and ideal equipment for monitoring and recording video data in video monitoring industry.

Mobile DVR is a set of computer system for image storage and processing, which has the functions of long-time video recording, audio recording, remote monitoring and control of image / voice.Mobile DVR integrates five functions, including video recorder, picture splitter, PTZ lens control, alarm control and network transmission. One device can replace a lot of functions of analog monitoring system, And it has gradually gained an advantage in price. In addition, the DVR image recording effect is good, the picture is clear, and can be recorded repeatedly, and the stored image can be played back and retrieved

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The hardware of DVR system is mainly composed of CPU, memory, motherboard, graphics card, video capture card, chassis, power supply, hard disk, connecting cable, etc.

At present, the mainstream DVR compression technologies in the market include MPEG-2, MPEG-4, H.264 and M-JPEG, and MPEG-4 and H.264 are the most common compression methods in China; Since 2008, BRVISION is a manufacturer and company serving the Heavy-duty truck and commercial vehicle industry with vehicle safety systems, including reversing camera, monitor, parking sensor and mobile DVR etc. The popular 256G SD card 4channel AHD DVR is avaialble now, it is with Built in Hisilicon high performance image processing chip, H.265 Video Compression code, high compression ratio, clear image,AHD 1080P video input,Built in G-sensor,Real time monitoring behavior of vehicle driving,Support 4 channels real-time preview and storage. In the case of the same image quality, using h.265 video can achieve half the volume of H.264. This means that the quality of video content will increase a lot, and can save a lot of network bandwidth! Compared with the current H.264, h.265 uses a variable size coding unit and a more advanced intra prediction mode.