C-Media Multi-Sound Spezifikationen PDF herunterladen (Seite 42)

42 Chapter 3 Media

Pre-splitting Large Movies Modern computers are generally capable of playing at least one high defini-

tion video file. Fast computers may be able to play several high definition

videos at the same time. As long as what you need to play fits within the realm

of your computer’s capabilities, you should generally choose among the

MPEG-2, H.264 or Windows Media high definition formats.

However, for extremely large movies, spanning numerous displays, even

modern computers may not be fast enough to handle the required resolution as

one large movie. This applies in particular to computer generated movies,

which can be made at any resolution and frame rate your animation software

is capable of producing. Such very large movies can be played by splitting

them into individual pieces, where each piece includes only the portion of the

frame that will play on each display.

While this splitter function is built into WATCHOUT for still images, it is not

handled automatically for moving images. The primary reason for this differ-

ence is that the original, large movie would most likely have to be compressed

in order to be stored and distributed to the display computers. To split the

movie, the display computers would have to decompress each frame, split it

and then re-compress the result again for final playback. This would mean that

each movie frame will be compressed twice. The end result would be a loss of

image quality.

In addition to this quality aspect, there are also storage and bandwidth consid-

erations related to distributing and storing the original (large) movie in order

to split it, as well as the processing time involved in compressing it twice. The

latter would be significant for such a large movie, particularly to achieve the

best quality.

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C-Media Multi-Sound Spezifikationen Seite 42