Comparison Between Bd And Hd Dvd; Hdmi - LG BH100 Training Manual

2003, with the introduction of consumer DVD Recorders. Once DVD had consumed all of VHS's
strong points, VHS began to fade away.
BD VS. HD DVD
The consumer market will most likely not support two competing formats for long. The determining
factor as to which format will survive is unclear. However, past factors have already been addressed.
Both formats have a large number of supporting companies. While the HD DVD format has the
support of the DVD Forum, many manufacturers favor the BD format. Likewise, several movie
studios back the BD format either exclusively or produced discs for both formats.
The 7th Gen. Video Gaming Console battles have already begun with the Sony PlayStation3 and
Microsoft Xbox360. Both consoles offer support for next-gen DVD formats. The Sony Playstation3
includes a built-in BD Player, while the Microsoft Xbox360 has an optional external HD DVD player.
The BD format, unlike the DVD format, had record ability in mind at the concept stage. There will
not be a necessary addition to the format in order to satisfy all consumer needs. In short, no one
knows which format will prevail, nor does anyone know exactly what factor will decide the outcome.
However, all known "bases" seem to be covered.

COMPARISON BETWEEN BD AND HD DVD

While both BD and HD DVD technologies employ a blue laser and are used for High Definition movie
content, there are several fundamental differences between the formats. Both formats call for a
12cm disc with a 15mm center hole, however the other physical characteristics differ. Burst Cutting
Areas (BCA) and Information Areas of the disc vary slightly. Both discs follow the same 1.2mm
thickness standard of the DVD format. The data layer of a BD disc is only 0.1mm behind the
protective bottom of the disc. The HD DVD format once again follows the DVD standard of having the
data layer in the middle of the 1.2mm disc, at a depth of 0.6mm.
The BD format has a high capacity that disc in the HD DVD format. BD discs can hold 25GB per layer
and a typical Dual Layered disc will hold 50GB of data. HD DVD discs can only hold about 15GB per
layer with a Dual Layered disc holding 30GB of data. This higher capacity also allows the BD format to
support higher bitrates (54Mbps for BD) than HD DVD (36Mbps).
The disc manufacturing process is different for the two formats as well. The HD DVD format disc
share many characteristics as DVD disc and therefore share some manufacturing equipment. The BD
discs, however, require more of a complete retooling to produce. Therefore, it is expected that
initially HD DVD discs will have a lower production cost that BD discs. The actual creation process for
dual layer DVD and HD DVD discs involves one half of the disc to be flipped over and then glued to the
other half. In the BD creation process, the entire disc is made as one cohesive unit, not requiring
gluing. As a result, it is expected that ultimately the BD format disc will have a lower production
cost.

HDMI

HDMI is an audio and video connection interface. The first, and most obvious, advantage of HDMI is
the fact that both audio and video signals are carried on a single cable. The second advantage of
HDMI that a consumer will notice is the fact that HDMI transmits digital signals. (Other interfaces
such as Component Video and RGB must convert digital signals to analog prior to transmission and
then be reconverted back to digital within the connected device.) The aspect somewhat unseen to
consumers, yet a major advantage to the CE industry, is HDMI's ability to provide two-way communication
between devices. In fact, an electronic device's I2C Bus is extended on the HDMI connection.
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