HD Ready, Full-HD and HDMI
This section is to highlight the difference between compatibility and adaptation and how to take full advantage of the high-definition Blu-ray. It is said to support any TV to reproduce the content of Blu-ray. This is accomplished with devices carrying the HD Ready logo or 1080i, which does not mean that you get the most out of the high definition since it only guarantees that the minimum resolution is 720 lines in widescreen (1280×720) with progressive scan (if scaling mode ensures 1920×1080). If we want high definition with a resolution of 1920×1080 in progressive mode those devices must be marked under the banner of Full-HD or 1080p.
The adaptation is a conversion that involves a loss in the audio signal and / or video. In the latter enters the HDMI connector that allows the sending of the signal native high definition (1920×1080, 24fps and progressive search) to ensure maximum redundancy and quality of the scenes. Any other connection, either analog or digital will have to adapt to the logical consequences. Even with HDMI connector, you should look for devices which carry the version 1.3, as it is currently the only one that supports all audio and video formats and doubles the transfer rate on its version 1.2. Any connector and means used to connect the player with the viewing device must be compatible with HDCP (HDMI is) otherwise we will turn the signal prior to departure to DVD quality.
As you can see who are ready for high definition should look for players with HDMI 1.3 and Full-HD devices.
You can see the Blu-ray technology allows a higher transfer rate for video. This difference has not been exploited in many cases due to several factors. First, the rate is variable and depends on which company will choose to use, not necessarily the maximum. Second, the rate may have other utilities besides the transmission of video. Finally, influences the codec used, Blu-ray companies used in their first releases the MPEG-2 that made not only the quality is lower than expected in a high-definition playback, but was below its competitor HD DVD from the beginning mainly encode VC-1.
The audio transfer rate is also higher in Blu-ray than HD DVD.
The table can not be assessed, but to understand the differences between Blu-ray and HD DVD have to realize that while the first is a new technology that seeks to increase benefits, the second wants to improve the DVD without significantly increase costs. The HD DVD therefore has enough going for it that a few modifications in the production of DVD equipment while in Blu-ray has been necessary to install expensive new production equipment.
Prices in Blu-ray has much to lose as the costs are higher, as reflected for example in the readers. HD DVD readers cost around half of what the Blu-ray, although in 2007 this difference low. By contrast the films have a similar cost.
As for the hybrid securities (high definition DVD) seems better on Blu-ray system that allows each format to assign a layer without changing its appearance. HD DVD faces is assigned by what is done to change it. Besides the hybrid support is limited to two formats (both sides) while Blu-ray layer can be as many as there (though for now it makes no sense to add other formats is possible to do so in the future).
A third format, HD-VMD it also must be named and who also is focused on providing high-definition. Its main disadvantage is that it has the support of large companies and is the great unknown. So his main challenge is to offer the same as the other technologies at a price more affordable, so part of the DVD technology (laser red). In the future, when the blue laser technology is reliable and inexpensive plan to adapt to this.
