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  1. ptkim9005

    IE8 doesn't show DVR pictures

    check for Compatibility mode as well. some old ActiveX controls only work in IE8 within compatibility view only. IE8 -> Tools -> Compatibility view.
  2. ptkim9005

    TV Line Debate. Important or Over emphasized?

    A few things not being discussed here are the codecs and bit rates. Different vendors have different codecs and different codecs have different profile and bit rates. Yes. Most DVRs digitize the NTSC signal at 704x480(240) at D1(2CIF) resolution. so you will lose horizontal 36 pixels here each line. But then the codec and bit rate given for the codec make the whole difference. Some DVRs call it recording quality/level, compression quality/level or bit rate (in kbps). Different codec chips have different max bit rate at a certain profile. Some DVRs have max bit rate of 2048Kbps for D1 at 30 images per second in H.264 Base Profile. In this case, you really do not want to go more than 480TVL, because you will be hardly able to tell the difference between 480TVL vs 700TVL. Everything is a trade off. When you increase the bit rate, the fidelity will be better in the recorded video. However, it will eat up your HDD that much faster. Another thing is Higher TVL sensors have less sensitivity. The image sensor pixel size has to be smaller if you have to have more pixels in 1/3" real estate area. --- all Sony Super HADII ICX632BKA 1/3" NTSC 510 x 492 3,800mV CXD1257A ICX638BKA 1/3" NTSC 768 x 494 2,250mV CXD1265R ICX662AKA 1/3" NTSC 976 x 494 1,600mV from http://www.sony.net/Products/SC-HP/pro/image_senser/color_video.html from http://www.sony.net/Products/SC-HP/effiowld/products/ccd.html I always advise people to use the right angle. If the objects you want to record are big enough on the video, then you do not have to have 700TVL cameras.
  3. ptkim9005

    Installer Help me

    The easiest way is...if the light spot is the spot light under cashers, then adjust the camera angle a little bit down so that the camera scene does not include the light. Of course, unless you need to have the camera looking up in the ceiling for some reasons. the other way, is... if your camera has OSD, look for HLC (High Light Compensation) and turn it on. It will mask the light to some degree, but not a very good solution though.
  4. ptkim9005

    Indoor LED and white balance

    Hallogen lights gives a lot of IR, like Tungsten or sunlight. I am thinking it is the IR reflection on black fabric that make it look blue, green or gray. You can confirm this if you have Florescent light. Turn off all hallogen lights and only have FL lights on to see if your black fabric is still blue, green or gray. If your shop keeps some lights on during the night, you can use just a Day mode color camera, which cuts IR lights. But if you do not have enough light at night and want to avoid this, you need cameras with Infra-red Cut Filter Removal cameras. They are called True Day and Night cameras or ICR(IR Cut filter Removal) cameras. Many threads are here on the forum about this issue.