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HDMI cable performance knowledge
Publisher：admin Time：2011/10/31 14:11:13 Browse：1082
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HDMI cable for deep rich color application system performance
Currently, high-definition multimedia interface (HDMI cable interface) has become either a high-definition television (HDTV) and numerous multi-media content for HDTV sources to provide a standard interface between devices. With the new HDMI 1.3 standard used in the system, the use of richer high-resolution video data to achieve a more crisp clear image possible. HDMI cable interface specification includes vivid color of the deep color enhancement, there are many other improvements, including better lip synchronization, support for lossless HD audio formats, "xvYCC" extended color gamut, and an emerging small connector.
Deep Color HDMI cable interface, the system will provide a more realistic and vivid television experience, and supports 10 -, 12 -, 16-bit color depths (RGB or YCbCr), HDMI cable interface to provide a more vivid color images, eliminating the current high-contrast display The band interference. By providing better color depth of the most dark and white among the most Huiying (shades of grey), improved contrast-enhanced display quality, resulting in smoother color images.
HDMI cable interface, the new specification also supports the "xvYCC" color standard, which greatly extends the current HDTV standard color gamut, resulting in more accurate color reproduction, and can show any human eye can see colors. Schedule summarizes the HDMI 1.3 standard, including a variety of enhancements to the specific description of reality.
HDMI cable interface, such as HD-DVD and Blu-ray player in these new high-definition equipment, will use these advanced color performance, but this also depends on the content providers to drive again provide deep color content. In the latest gaming platforms, such as Sony's PlayStation 3 (Figure 1), also uses deep color performance. This makes the game platform can provide a more vivid gaming experience.
In order to better support between source devices and HDTV higher data rate, cable must also be able to handle higher bandwidth signal. HDMI 1.3 specification defines two new cable, the seller can differentiate according to the system need to determine the cable type:
1 standard cable (category 1), such cable supports speeds up to 75MHz, the rate of the corresponding resolution is 720p and 1080i;
2 high-speed cable (category 2), such cable supports speeds up to 340MHz, corresponding to the 1080p, deep color and high refresh rate.
Although the vast majority of cable can only be used as a standard cable, but many of them (especially the 3 m or shorter cable) through high-speed cable testing standards. Can make the cable has a higher degree of quality and will be up to 340MHz over high-speed signal transmission over longer distances of the most critical factor is the HDMI cable interface receiver chip integrates a balanced circuit. In the HDMI interface clock speed is very high, more than compensates for the circuit signal attenuation loss. |
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