17. Glossary / Key Word Index
17.1What are DVDs, VCDs and S-VCDs?
DVDs
DVD is the abbreviation for "Digital Versatile Disc". DVDs are a storage medium for audio and video data; they are available in 8 cm and 12 cm (Dia- meter) formats. Because of the much higher storage capacity as compared to
VCDs/S-VCDs
"Video CD" (VCD) and "Super Video CD"
VCDs are available in two versions:
•With version 1.1
•With version 2.0
Playback Control (PBC)
Version 2.0
17.2 What are Title and Chapter?
Title is the name given to the largest units of image and sound units on DVDs; on many DVDs the (Main) film has the title number 01. For bonus mate- rial (i.e. Film trailer, background information etc.), that is available on many DVDs, other possible title numbers can be used.
Chapter is the name given to the next smaller image and sound units beneath title. If the title or titles on a
Bear in mind that not on all DVDs …
•are the DVD or the title divided into (numbered) chapters
•Chapters are also designated as "Scenes" (i.e. in the main menu of DVDs)
17.3 Dolby Surround
Dolby Surround is an analogue sound format, by which the two channels of a stereo sound signal are used in order to accommodate room sound information for further channels. With a Dolby Sur- round decoder the signals are again converted into sound and/or music and are fed to two additional loudspeakers, which are to be situated behind the listening area.
Dolby Prologic
In comparison to Dolby Surround sound format, with Dolby Prologic an additional channel in the ste- reo signal is used; this is the so called "Centre" channel. The corresponding centre loudspeaker is to be situated in the middle between the stereo loudspeakers. The deepest sounds are fed to a bass loudspeaker, the so called "Subwoofer". The subwo- ofer can be placed in any desired location in the room; the logic for this is that the bass sounds that the subwoofer puts out can scarcely be localized exactely by the human ear
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