1. Use HDMI HD cable precautions With the upgrading of HDMI devices, LCD TVs, Blu-ray DVDs, HD projectors and other devices are equipped with HDMI interfaces. As we all know, in the past, we need many cables to connect devices, and very troublesome to organize and arrange them. Now only one HDMI cable can realize simultaneous transmission of images and sounds, and very convenient to connect them, the picture quality is clearer and fuller, and the sound is more real and natural. Most users are care about how to choose HDMI. However, it is also very important to use HDMI cable correctly. Here we take HDMI cable as an example to introduce the problems that need to be paid attention to when using it. 1).Advice to power off before take away the cable HDMI interface is very convenient to plug and unplug, and the HDMI cable is also hot-swappable in design. However, due to the different internal processes of different HDMI lines and different connected HD devices. some users have hot-swapped HDMI HD cables to make the HDMI chip burned out. Therefore, in order to use the HDMI cable for 100% security, we recommended to confirm that the TV and HD player are turned off when plugging and unplugging the HDMI cable. In this way, the HDMI cable and HD are enabled. The equipment is more secure and avoids accidents. 2).HDM cable connect tv and HD player Many HD users will encounter some problems when they first connect TVs to HD player using HDMI cables. When the HDMI cable is connected to HD player and turned on, there is no video signal on the TV. In this case, don't panic. Please check whether the TV has other HDMI interface. If yes, please choose the correct interface. Keep the machine power offer then Just plug it if there only one HDMI port , the other end to HD player port . After the power on, enter the TV menu, set the HDMI mode, and select the right mode.then comfirm it. 3). USE The different type HDMI cable As the connected HD devices different, choose the appropriate HDMI cable is very necessary. In particular, more and more home users start to use the computer to connect to the LED TV to watch the video. When the computer graphics card is DVI interface not HDMI interface, HDMI to DVI HD can work. The DVI connector adopts use standard DVI-D24+1. It has strong versatility and can connect to many digital home appliances. it can adapt to many situations with 1.8m standard length and avoid the winding of wires. For home-based wiring needs, it is especially important to choose a versatile and practical HDMI cable. 180° bend HDMI HD cable help you maximize space saving and avoid line clutter. The large deflection of 0°-180° can satisfy almost all situations and increase the usage rate of single products, which is very suitable for hanging LED TVs. 4)Long distance transmission have strict requires to wire when transmitting 1080i or 720P signals, the difference is not big on Long-distance transmission , but the requirements for HDMI lines are very strict when transmitting 1080P signals. If the quality of HDMI lines is not good, the screen jumps, large erythema, even no signal, so the choice of long distance lines should be very cautious. HDMI cable use 24K gold-plated connector, high-purity oxygen-free copper conductor, and high-density double-layer shielding, can accurate transmitter high-quality multi-channel digital audio,support high-definition resolution, full support 480P, 720P, 1080I, 1080P video formats, Strong compatibility, transmission rate up to 10Gps, stable signal transmission. Second, audio and video audio cable basics knowledge(HDMI cable). 1.HDMI High Definition Multimedia Interface (HDMI) is an all-digital video and audio transmission interface that transmits uncompressed audio and video signals. HDMI can be used in (plasma, LCD) TVs, rear projection TVs, projectors, set-top boxes, DVD players, personal computers, video games, power amplifiers, digital audio, and so on. Since HDMI uses the same line to transmit audio and video signals at simultaneously, it greatly simplifies system installation. HDMI is designed to replace older analog video transmission interfaces such as SCART or RCA. The standard Type A HDMI connector has 19 pins that can compatible with the Single-link DVI-D or DVI-I interface (but not DVI-A) used in most displays and graphics cards today. This means DVI- The signal source of the D interface can drive the HDMI screen through the conversion line, but this conversion scheme does not support audio transmission and remote control functions. The HDMI organization's sponsors include major consumer electronics manufacturers such as Hitachi, Matsushita Electric, Quasar, Philips, Sony, Thomson RCA, Toshiba, and Silicon Image. In addition, HDMI is also support by major film production companies such as 20th Century Fox. Warner Bros., Disney, and major consumer electronics manufacturers including Samsung Electronics, and several cable TV systems. · HDMI1.3 · The current mainstream version on market, the main function features: Data transfer speed up to 10.2 Gbps, support maximum resolution 1080p Color gamut (16.77 million colors) expansion supports 30-bit, 36-bit, and 48-bit (RGB or YCbCr) color gamut (equivalent to over one billion colors) and supports new xvYCC color standards Support automatic voice synchronization (line-to-mouth) function Support Dolby TrueHD and DTS-HD Master Audio signal output Mini connector for portable camcorder · HDMI1.4 · The HDMI Association released the latest specifications in June 2009, with new features: Support network transmission Audio return channel Support 3D up to 1080p resolution Support 4Kx2K resolution (supported formats include: 3840x2160 24Hz/25Hz/30Hz; 4096x2160 24Hz) Extended support for color space (sYCC601, Adobe RGB and AdobeYCC601), more accurate color when connected to a digital camera Define miniand automotive interfaces 2. Video audio and video cable basics knowledge (video line") VGA (Video Graphics Array) VGA also called D-Sub. The VGA interface has 15 pins, divided into 3 rows, 5 per row, which is the most widely used interface type. Most g -raphics cards have this interfaces. It transmits red, green, and blue analog signals as well as sync signals (horizontal and vertical signals). Use a VGA connection devic -e,the cable length should not exceed 10 meters, and pay attention to whether the connector is installed firmly, otherwise it may cause ghosting in the image. DVI (Digital Visual Interface) DVI interface and VGA are the most commonly used interfaces in computers. Unlike VGA, DVI can transmit digital signals without having t -o go through digital-to-analog conversion, so the picture quality is very high. Currently, DVI interfaces are also available on many HDTVs. It should be noted that there are various specifications for the DVI interface, and DVI-D (Digital) and DVI-I (Integrated) are common. DVI-D can only transmit digital signals, you can use it to connect graphics cards and flat-panel TVs. DVI-I can be converted from VGA to DVI-D. Component Video color difference component line, the best quality analog video cable, DVD, TV and projector have such ports, it will transmit the three reference colors red, blue and green separately. Eliminate interference between each other and present high-resolution image quality. Usually labeled Y/Pb/Pr, each cable and interface is labeled in red, green, and blue. The green cable (Y) transmits the brightness signal. The blue and red cables (Pb and Pr) transmit color difference signals. Composite Video usualy uses a yellow RCA (Lotus Socket) connector. "Composite" means an analog signal that transmits luminance and chrominance signals in the sa -me channel,if the television does not separate the two signals well, a ghost will appear. The S-Video (S-Video) connection uses a Y/C (brightness/chrominance) separate output, which uses a four-core cable to transmit signals with a four-pin connector. In the interface, two pins are grounded, and the other two pins transmit luminance and chrominance signals respectively. Because the luminance and chrominance signals are transmitted separately, the S-Video effect is better than the composite video. 3. Audio-visual cable basics knowledge(audio line) RCA analog audio, RCA connector is often called the lotus head, currently the most common audio connection is using the RCA to transmit analog signal. Each RCA cable is responsible for transmitting the audio signal one channel, so a stereo signal requires a pair of cables. For multi-channel systems, the same number of cables are required depending on the actual number of channels. generally the right channel is marked in red, and the left channel is marked in blue or white Stereo RCA audio interface. S/PDIF (Sony / Philips Digital Interface) interface is a standard, a digital audio output interface jointly developed by SONY and PHILIPS, S/PDIF interface cover the digital interface and optical interface . This interface is widely used in CD players, sound cards and home appliances to improve the sound quality of CDs and offer us a more pure auditory effect. Speaker cable, in the home theater, the speaker cable for the surround channel is usually led out from the AV amplifier/multi-channel rear stage in the front audio cabinet, and then connected to the surround speakers in the back wall, for the sake of neatness and aesthetic considerations. Pre-buried during renovation. Third. HD digital line HDMI solution 1. What is "HDMI"? The full name of HDMI is "High Definition Multimedia Interface" (HDMI), which is a fully digital video and audio transmission interface that can transmit uncompressed audio and video signals.
2. What does "HDMI1.3a" emphasize in the market? In the development process of HDMI products, the functions have been continuously improved, and its version has been continuously upgraded; the current mainstream version on the market is 1.3a; the HDMI Association launched the latest version 1.4 on June 5, 2009.
3. Is there a length limit for the HDMI cable? The function of the magnetic ring is to filter the noise, thereby reducing the signal interference. Usually, the magnetic ring improvement scheme is adopted only when the anti-interference ability of the wire material itself is weak. Therefore, an HDMI cable with a magnetic ring is not mean a good HDMI cable. 4. Is the HDMI cable covered with a woven mesh on the outside means the transmission quality better? Many HDMI cables prefer to use woven mesh. Usually use nylon does not improve the quality only have decorative function.
5. Is the transmission quality better with copper when use core HDMI cable? Generally speaking, a better quality HDMI cable will use pure copper as the inner core, which is beneficial to ensure the quality of signal transmission. Usually the poor quality HDMI cable will use iron core or other alloy materials to reduce costs.
6. Is the more internal shield of the HDMI cable the better? The purpose of the wire shielding layer is to prevent the signals interfering with each other; the shielding layer effect is closely related to the shielding material covering density, the higher the density, the better the shielding effect; the HDMI wire shielding density is generally "metal braid coverage 85%, and the aluminum foil covers 100% . As for the high-end quality HDMI cable, the the metal braid coverage must reach to 95% or more, and the aluminum foil cover 100% . Therefore, the more shielding layers for HDMI cable do not indicate the better the quality. 7.Is all HDMI cable can transmission 1080p signal? The HDMI cable has a dedicated product association to regulate specifications and performance, and must pay royalties. If the HDMI cable is certified by the product association, the product has enough bandwidth to transmit 1080p signals, otherwise the HDMI cable with insufficient quality cannot transmit 1080p signals to achieve high definition requirements. 8. What are the benefits of environmentally friendly wire? The reason why the wire is not environmentally friendly is mainly because the plastic material PVC (polyvinyl chloride) generates a large amount of toxic gas and smoke when it is heated and burned, which causes great harm to the human body, and the halogen contained in the PVC (a flame retardant) The substance) is also harmful to the human body. At present, very few individual manufacturers on the market have the ability to apply halogen-free environmentally friendly materials (excluding PVC and halogen) and nanotechnology to the wire to achieve green and environmentally friendly wires. This wire does not generate toxic gases when heated, and there is little smoke. It does not contain substances harmful to the human body and solves the safety problems in consumer use. Four. The difference between HDMI cable and color difference line Today's HD players generally have an HDMI interface and a color difference interface, which correspond to HDMI lines and color difference lines, respectively. So what exactly is the HDMI cable? What is the color difference line? The so-called color difference line is the three interfaces(Y Pb Pr) that we usually use behind the TV, DVD, etc. Since this line is composed of three lines, there is also a three-color difference line, which is a necessary line for home theater. The HDMI, as its name implies, is an all-digital image and sound transmission interface, which can transmit uncompressed audio signals and video signals. The full name of English is High Definition Multimedia Interface, and the Chinese name is the abbreviation of high-definition multimedia interface. HDMI can be used in set-top boxes, DVD players, personal computers, video games, integrated amplifiers, digital audio and televisions. HDMI can transmit audio and video signals at the same time, greatly simplifying the installation because the audio and video signals with in one cable. First, the biggest difference between the HDMI line and the color difference line is that the HDMI line outputs a digital signal, and the color difference line outputs an analog signal. Digital signals won’t lost during transmission, and analog signals are easy susceptible by external and internal factors that cause signal loss and affect the final picture quality. HDMI can transmit uncompressed high-definition video and multi-channel audio data with high quality to meet the current highest resolution 1080P resolution, while the color difference line output analog signal,only supports up to 480P, which is the ordinary DVD players display effect
The length of the HDMI cable can reach to 15 meters and does not affect the quality of the picture, which greatly facilitates the user's needs, only 5 meters for the color difference line can reach the same function. If exceeds this range, it will affect the quality of the picture. Therefore, the HD player can only be equipped with an HDMI interface is enough, and the era of color difference lines should end here! However, many HD players still have a color difference interface, which may be to fully consider the needs of users. key point:
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