subject: Breakthrough In Home Theater Audio Transmission Bottlenecks In The Digital Interface Of The War - [print this page] Today, we are concerned to explore the digital home environment with the data transmission interface. For example, the computer how to connect digital TV? DVD player, DVR and the upcoming Blu-ray player / HDDVD players how to adapt to the digital display technology ... ...
HC Video Network 1, DVI: extended family from the computer field Video Environment
A few years ago, the industry has been looking forward to the computer and home audio and video electronic products become inseparable from the overall combination of the two free connection and to achieve even better entertainment. This is only a dream at that time, computer and audio-visual products in the home environment there are enormous obstacles. Computer digital technology, all data are based on binary expression, and home audio-visual products are based on analog technology, all of the images, video, audio information is expressed by a continuous sinusoidal signal. As the expression of basic signal there are fundamental differences, both the control circuit also belong to different systems, could only achieve through digital-analog conversion of basic information sharing, not to mention coordination. This restriction applies until the digital display technology, audio-visual field before starting to gradually change, specifically, in the plasma TV, LCD TV Products have been popular, and after the commencement of digital television standards, computer and audio-visual communication and coordination of electronic products will be possible, which is the core concept of the digital home.
However, today we have not explored how the two systems collaboration, but concerned about the digital home environment with the data transmission interface. For example, the computer how to connect digital TV? DVD player, DVR and the upcoming Blu-ray Player / HDDVD players and digital display technology to adapt? Widely used in analog transmission interface naturally can not continue to introduce new interface technology is imperative. DVI and HDMI eventually assume the burden, while the two interfaces is technically different from each vendor have been a lot of support, thus forming two interfaces coexist.
DVI: expanding the field from the computer to the home theater environment
For the DVI interface, all familiar with, it is widely used in the computer's L CD Display, was introduced into the audio field may make many people feel fresh. Over the years, home theater environment are based on analogue technology, as the video output of TV and audio output device as Speaker Without exception, processing and receiving only analog signals, this, DVD, CD players, digital devices have to be video or audio signal prior to conversion to analog format, and then were transmitted to the CRT TV or Sound Equipment. As the analog signal does not exist the concept of data transfer rates, no complex interface bus, a simple copper cable and coaxial interfaces can meet the demand, and this is the last home theater environment, standard mode. However, LCD TV, Plasma TV Become a reality, when popular digital home concept, the industry found that continue to use the analog interface is a very stupid way, because as the signal output of DVD players, hard disk recorders, as well as the TV signal receiver are based on digital system re-use of analog interface not only increases costs, signal quality is also inevitable losses, timely introduction of a specialized digital interface is imperative. Custom design for the LCD display
DVI interface to be the first consideration of the object. The interface specification by Intel, SiliconImage, Fujitsu (Fujitsu), Hewlett-Packard, IBM and NEC and other major companies formed "DDWG Digital Display Working Group" (DigitalDisplayWorkingGroup) joint development, led by the Intel Corporation. DVI stands for "DigitalVisualInterface", means "digital video interface", 1.0 standard as early as April 1999 on the official release.
In basic technology, DVI digital interface technology inherited DFP (DigitalFlatPanel), are based on T MD S signal format? TMDS (TransitionMinimizedDifferentialSignaling) is a differential signaling mechanism, which can be encoded pixel data, and conducted by serial transmission, using the technology, an uncompressed digital video signal can be smoothly transferred to the LCD display directly on the display.
