Real HD 720p car black box/car DVR SD - testing report from Northvision Technologies
Our engineer tested
the device the whole day.
1. The SD - for testing as below: SanDisk High speed SD - 4GB SanDisk normal speed SD 4GB Taiwan Chip, high speed SD - 4GB Upgrade, copy SD - 4GB
2. Testing car black box model: Real HD 720p car black box /car DVR, night vision, 2.5 inch LCD screen, Northvision model 602-3
a. This model is using SQ solution (service & Quality) for completed electronic design. So, it is high stable, high quality.
b. Real 1280*720 video not adjust parameter by interpolated technology, it is the real resolution of camera sensor.
c. Night vision function. 4 PCS IR LED for light supplement
3. Testing processing
1) SanDisk High speed SD - 4GB Work perfect with no any problem. Cycle recording 56 times, work well, no "disk full" alert in screen. 2) SanDisk normal speed SD 4GB Video record work well. When - is full, there is "disk full" alert in the screen. In this period, sometimes, the device can continue recording. But if the old video clip is very big size (for example, 15min/clip), sometimes, the device will system halted. 3) Taiwan Chip, high speed SD - 4GB Work well like condition of a. 4) Upgrade, copy SD - 4GB There are any problems.
a. Once you start power, it alert "disk full", b. Record for a while and then stop...
This device only works well with high speed SD -. Northvision car black box / car DVR 602-3 uses 5.0Mega pixels camera, SQ high definition solution, so the video size is very big. It needs high speed - to meet its requirement. When the - is full, the device needs to record and delete in the same time. Low speed - cannot work well like this and cause some problem. (For example, it will take more than 3 times minutes if you copy a 1GB file to low speed - instead of high speed -.)
This is a problem in the video recording field which is hard to resolve. And the best solution is to add a video compact chipset in the device that called h.264. It can compact the video file to small size. But it seems it will cost much. That is why our car black box / car DVR model J2000 is more expensive than others.
We advise that, when you sell it, please make the buyer clear, match our device with high speed SD -. Or, sell the device with high speed -.
Contact Name: Eric Zhou
Company Name: Northvision Technologies Co., Ltd
Street Address: B12B, Duhui 100 Building B,
Huaqiangbei, Futian District, Shenzhen,
Member name: NorthvisionTechnologies
Member Since: 13 May 2010
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