1. high-speed transmission – HDMI 1.3 originally 4.96Gbps bandwidth doubled to 10.2Gbps, Single Link TMD 165MHz width up to 340MHz, hoping to meet future Single Link more high capacity high resolution digital content, if necessary, you can also use B-TMD specifications to further increase the bandwidth.
2. more high chromatic number — existing HDMI 1.1 and 1.2 Edition only supports the 24-bit color depth, 1.3 HDMI interface is greatly expanded to 30-bit, 36-bit and 48-bit (RGB or YCbCr) with output capacity of more than 100 color and substantially increase contrast levels. In addition, support a new generation of "xvYCC color space, known as" with the current color space specification 1.8 times the color signal output capability.
3. supports lossless audio — sources transfer, since the currently popular audio specifications are mostly using compressed sound, dynamic performance will inevitably be a distortion of the situation, HDMI support multiple-rail high flow of uncompressed audio sources or non-distortion compression audio source (such as Dolby TrueHD and DTS-HD Master Audio).
Other improvements in small details, such as for mini Terminal increased diminished version of joint specifications, and automatic audio and video synchronization feature. Of course, a basic prerequisite is the past-compatible elements, 1.3 fully compatible to 1.2 and 1.1.
First we look at the bandwidth doubled this point, in this regard is mainly directed against its competitors DisplayPort interface specifications, by VESA organization and PC manufacturers vigorously pursued DisplyPort interface can reach more than traffic, 10.8GBps book specifications of transmission HDMI so plan ahead, preemptive launched the official version of the specification to version 1.3 program system, after all, DisplayPort has no actual finished product appears to have been introduced in the market for some time of HDMI, a relative comparison of the dominant.
As for the high chromatic number of output, the current mainstream LCD/Plasma digital TV's biggest shows chromatic number remains in the situation of 1677 million colors, still difficult to see in the near future to its practical application, and after more than 30-bit color value, in fact, the naked eye is not so easy to read out, DisplayPort announces support for 48-bit high color depth specifications, HDMI has joined support a dispute, the actual significance is not large, but HDMI 1.3 in strengthening the high contrast output capacity, is to a considerable degree of enhanced TV picture quality performance.
DisplayPort is not a simple role, packet-based transport rules, you can apply a variety of cutting, for example single screen and multiple screen/slave screen output, etc., through a very simple way to reach. ATI and NVIDIA video card manufacturers such as mainstream as well as the support of various PC manufacturers, but also strengthen the momentum of DisplayPort, initially will be working side-by-side support (i.e., supports both HDMI and DisplyPort interface, support for NVIDIA or even a UDI specifications).
In this regard, although the HDMI specifications have already applied for the PC, but the actual compromises application vendor is rather small, and household appliance manufacturer's warm support situation, has a considerable gap. In this regard, there are several factors, first of all, is the authorized costs are quite high, but will pay an annual fee of us $ 15,000, each terminal products are also additionally charged 4 cents to 15 cents of royalties (depends on matching HDCP copy protection adopted or not, and HDMI logo marks), and HDCP with authorized, required to pay the cost of licensing is doubled, and HDMI materials costs were also required an additional $ 20 or more, but its testing and certification process, must also be charged 3,000 ~ 7,000 dollar, which had already gone into the profit margins in the era of competition IT industry, is a considerable burden.
DisplayPort specification is largely without having to pay licensing fees, IT industry, is a very attractive on the one hand, but DisplayPort in certification fees and Terminal authorization, VESA organizations not yet have a clear criteria, to support manufacturers, which worries.
In terms of copyright protection, HDMI is the standard that uses HDCP authentication protocol (authentication protocol), the shared secret key (shared secret agreement) with HDCP device mutual recognition mechanism of three major agreements to protect copyrighted content.
The HDCP protection system is made up of 40-bit encoding, glance, devices and equipment for communication encryption protection seems to be broken, Kennedy developers also confidently represent this encrypting system does not like the previous generation DVD using CSS coding that are easy to break. Hardware encoding itself can be perfect, but the CSS is in the original design is not bad, will be cracked, but because the playback software itself, hackers from finding out the coding rules.
Currently HDMI CE already on the market in an invincible position, although in the PC market do not deep inking, but to their compatibility, universality and other advantages, to further expand the market seems to be not so difficult. 1.3 HDMI specification, the specification after catching up with the competition, the future seems to be more light,
But at the cost of living in the disadvantaged by Intel and Silicon Image dominated by streamlining the interface seems to be more type HDMI-UDI cannot be recovered PC makers, but whether UDI or enhanced version of the HDMI interface successfully heading to the PC market, profits are HDMI camp.
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