Now the car hard disk video recorder DVR manufacturers choose audio codec algorithm mainly include: mpeg-2, mpeg-4, h. 264, MJPEG, etc., including mpeg-2 and MJPEG compression ratio is low, use less; H. 264 video compression encoding algorithm rate is high, the stream is low, the wireless network, good adaptability to low bandwidth etc., is currently the car DVR to choose the direction of the compressed format. Car DVR video resolution with the improvement of the performance of the digital coding has from CIF (352 x 288) promoted to the D1 (704 x 576).

Working principle of the California eagle car DVR editor:

Car DVR are currently using the hard disk, U disk, SD card three storage mode, compared with U disk (car U disk video recorder) of higher reliability.

1, U disk, no mechanical moving parts, low power consumption, can be used in rough shape seriously and all sorts of power supply conditions on the bus. While in the car, ordinary car hard disk video recorder can not work normally;

2, convenient transcription of data, directly to the USB plug in the computer USB interface, can video playback, save the video, no hard drive connector, USB adapter, etc., operating more simple;

3, the usb interface design for plug repeatedly, more reliable than the SD card. SD card interface is inside the equipment interfaces, often is not suitable for plug, otherwise the damage rate is quite high. And USB interface equipment is indirect mouth, it is specifically designed to do data exchange between devices, regardless of the electrical and physical properties of the interface, and mechanical properties, are suitable for long-term use for exchanging data between devices.

California eagle car DVR, high-definition video recorder, four-way video recorder, the bus monitoring plan; Car video recorder, SD video, car SD card four-way video recorder.