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สินค้า/บริการ >> Lens & Accessories cctv เลนส์ >> VGA Converter VGA02
| VGA Converter VGA02 รหัสสินค้า: 004378 ราคา 1,600.00 บาท รายละเอียด:
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The popularity of LCD monitors is larger than CRT monitors nowadays, and the market share of LCD monitors
has reached over 50%. Dump your old VGA converter!!
VGA02 is especially designed to work with your LCD monitor, and it is definitely the best professional converter
which is worth to have. |
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. High end product, entry level price
. High quality image output
. Easy installation
. Suitable for all image output devices
. Available connection distance up to 50m |
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MODEL |
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VGA02 |
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Connection |
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DVR Side: MONITOR OUT Monitor Side: D-Sub |
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Function |
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1. Output Resolution Up to 1024 ℅ 768@60Hz
2. Analog non-interlaced RGB Output Supported
3. NTSC / PAL System Auto Detection |
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Power |
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External adaptor DC5V @ 500mA |
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Power Consumption |
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2 W |
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Dimension (mm) |
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87 (L) x 64 (W ) x 24 (H) |
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VGA Output |
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VGA is the abbreviation of Video Graphics Array. "VGA port" is also called "D-Sub port". A standard VGA connector has 15 pins and is shaped like a trapezoid. It arrays 3 rows, with 5 pins for each row. The image signals saved in the digital format (frame) will be modulated to high frequency signals in RAMDAC, and output as camera images. This can save the process of matrix-decoding the electric circuit conversion. The VGA video frequency transmission process is the shortest and has many advantages, such as the crosstalk non-electric circuit synthesis separation loss. |
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DVI Output |
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DVI port is used to display RGB signals by connecting to the PC graphic card which supports digital output. DVI (Digital Visual Interface) is a digital display interface standard introduced by the DDWG (Digital Display Working Group) established on Intel Developer's Forum in Sep. 1998. DVI digital signals are better than standard VGA signals. The digital jack can ensure that all the contents will be transferred in the digital format and the signal integrity in the process of transmission from the mainframe to your monitor to get clearer images. |
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BNC Output |
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BNC jack is a connector used for a coaxial cable. BNC stands for "Bayonet Nut Connector" (describing the shape of this jack symbolically), also known as"British Naval Connector" (possibly because it was firstly used by British Navy) or "Bayonet Neill Conselman" (Neill Conselman is its inventor). BNC cable has 5 connection pins to receive red, green, blue, horizontal synchronization, and vertical synchronization signals. BNC tie-in is a special monitor jack, different from a normal D-Sub 15 pin connector. It is composed of red, green, blue, row synchronization, and field synchronization signals, and mainly used in connecting the system that has high requirements for the scan frequency, such as the workstation.The coaxial cable with BNC tie-in is one kind of the shielded cable and has the advantages of long transmission distance and stable signals to isolate the video input signals and decrease the signal interferences. Furthermore,its signal bandwidth is larger than ordinary D-SUB to achieve the best signal responses. |
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Standard Video Output (RCA) |
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Also called the AV jack,RCA is usually paired inwhile (audio) or yellow (video), and connected by putting the standard AV line with a male RCA connector into the corresponding female RCA connector. The AV jack can separate the transmission of audio and video to avoid the interference between audio and video frequencies and prevent the decreasing of the image quality. Because AV jack transmission is the mixed video signals of brightness / chromaticity (Y/C), the image output devices should separate brightness / chromaticity, and then decode the chromaticity to form an image. This process will inevitably damage color signals, and the interference between Y/C signals is also highly possible, which will affect the final image output. Because of these defects, it cannot be used in some situations that excellent images are highly demanded. |
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S-Video Output |
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Super-Video, a faster video transmission with clearer images to receive better video output. It divides Y/C signals when video information is received and transmitted via different channels. When sent to a television, this produces sharper images than the composite video, where the video information is transmitted as a single signal over one wire. This is because televisions are designed to display separate Luminance (Y) and Chrominance (C) signals. (The terms Y/C video and S-Video are the same.)
Computer monitors, on the other hand, are designed for RGB signals. Most digital video devices, such as digital cameras and game machines, produce video in RGB format. The images look best, therefore, when output on a computer monitor. When output on a television, however, they look better in the S-Video format than in the composite format.
To use S-Video, the device sending the signals must support S-Video output and the device receiving the signals must have an S-Video input jack. Then, you need a special S-Video cable to connect the two devices.
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Video Chromatism Output |
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Component Video is delivered, similarly, with the color information split up three ways. However, component video uses a "color-difference" type signal, which consists of Luminance (the "Y" or "green" channel, representing the total brightness of the image), Red Minus Luminance (the "Pr" or "Red" channel), and Blue Minus Luminance (the "Pb" or "Blue" channel). The sync pulses for both horizontal and vertical are delivered on the Y channel. The display calculates the values of red, green and blue from the Y, Pb and Pr signals. |
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RGB Signal |
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The representation of multicolor signal is important in numerous video technical standards. The primary color signals are constituted of red, green, blue which we call RGB signal. As the digital technology develops, we're able to express any color in the world as constant or variable. We call the method of encoding the color as number "color space" or "color zone". As the RGB is one of numerous color spaces, each color can be expressed as three variables 每 red, green, blue light intensity in this encoding method. RGB is the most popular scheme of displaying and recording color image. In order to keep compatible with the early B/W Display System, most producers change RGB space to YUV space. To display color signal, turn YUV to RGB again. |
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YUV Signal |
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YUV (YCrCb) is a color encoding method adopted by Europe TV System (belong to PAL). YUV is used to optimize the transmission of color signal and keep compatible with old B/W TV System. Narrow bandwidth is a great advantage of YUV while RGB demands three independent signals transmitting synchronously. In YUV, "Y" is short for Luminance or Luma while "U" and "V" is short for "Chrominance" or Chroma which is to describe the color and saturation of the image and to specify the color of pixels. "Luminance" is created by superposing the particular part of RGB signals while "Chrominance" defines two parts of hue and saturation expressed by Cr and Cb. Cr reflects differences between the red part of input RGB signals and the luminance of RGB signals while Cb reflects differences between the blue part of input RGB signals and the luminance of RGB signals. That is the so-called Chromatic Signal or Component Signal (Y, R-Y, B-Y). |
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Composite Signal |
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Composing luminance signals, color signals and synchronous signals into one signal forms the composite signal. The composing process is called encoding. Color signals and luminance signals encoded are hard to separate from each other without signal loss. That's the reason why we think the quality of S-Video is higher than the composite signal. |
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