JBL DSC 400 G L O S S A R Y, Bit rate, Chapter, Multi-anglefunction, Multilingual function, Title

G L O S S A R Y

Bit rate	Logic Surround reproduces left-to-	the variable rate coding technology
Value indicating the amount of video	right panning more naturally and	that changes the data to be allocated
data compressed in a DVD per	localizes sounds more precisely. To	according to the status of the picture.
second. The unit is Mbps (megabit	take full advantage of Dolby Pro Logic	The audio data is recorded in Dolby
per second). 1 Mbps indicates that	Surround, you should have a pair of	Digital, DTS and/or PCM, allowing
the data per second is 1,000,000 bits.	rear speakers and a center speaker.	you to enjoy more natural audio
The higher the bit rate, the larger the	The rear speakers output monaural	presence. Furthermore, various
amount of data. However, this does	sound.	advanced functions such as multi-
not always mean higher quality
	DTS	angle, multilingual, and subtitles may
pictures.		be provided with the DVD.
	Digital audio compression technology
Chapter	developed by Digital Theater	Multi-angle function
Sections of a picture or a music piece	Systems, Inc. This technology	Various angles or viewpoints of the
on a DVD that are smaller than titles.	conforms to 5.1-channel surround.	video camera for a scene are
Many titles are composed of several	The rear channels are stereo and	recorded on some DVDs.
chapters, but many others are not.	there is a discrete subwoofer	Multilingual function
Each chapter is assigned a chapter	channel in this format. DTS provides
		Several languages for the sound or
number enabling you to locate the	5.1 discrete channels of high quality
		subtitles in a picture are recorded on
chapter you want.	digital audio. Good channel
		some DVDs.
Dolby Digital (“5.1”, “AC-3”)	separation is realized, because all
		Parental Control
	channels are recorded discretely and
This sound format for movie theaters
		A function of some (particulary US)
	processed digitally.
is more advanced than Dolby Pro
		DVD’s to limit playback of the disc by
Logic Surround. In this format, the	Manufactured under license from
		the age of the users. The limitation
rear speakers output stereo sound	Digital Theater Systems, Inc. US Pat.
		varies from disc to disc. When it is
with an expanded frequency range	No. 5,451,942 and other worldwide
		activated, playback is completely
and a subwoofer channel for deep	patents issued and pending. "DTS"
		prohibited, violent scenes are
bass is independently provided. This	and "DTS Digital Surround" are
		skipped or replaced with other
format is also called “5.1” because	trademarks of Digital Theater
		scenes and so on.
the subwoofer channel is counted as	Systems, Inc. © 1996 Digital Theater
		Title
0.1 channel (since it functions only	Systems, Inc. All rights reserved.
		The longest sections of a picture or a
when a deep bass effect is needed).
		music piece on a DVD; a movie, etc.,
All six channels in this format are
	MPEG AUDIO	for a picture piece on video software;
recorded separately for superior
	International standard coding system	or an album, etc., for a music piece
channel separation. Furthermore,
	to compress audio digital signals	on an audio software. Each title is
since all the signals are processed
	authorized by ISO/IEC. MPEG 1	assigned a title number enabling you
digitally, less signal degradation
	conforms to up to 2-channel stereo,	to locate the title you want.
occurs. The name “AC-3” comes
	used on some DVD’s as alternate
from the fact that it is the third audio		Track
	(other language) track.
coding method to be developed by		Sections of a music piece on a CD.
the Dolby Laboratories Licensing	DVD	Each track is assigned a track
Corporation.	A disc that contains up to 8 hours of	number enabling you to locate the
Manufactured under license from	moving pictures even though its	track you want.
	diameter is the same as a CD. The
Dolby Laboratories. "Dolby", "AC-3",		PCM
	data capacity of a single-layer and
"Pro Logic" and the Double-D symbol		Pulse code modulation, an
	single-sided DVD, at 4.7 GB (Giga
are trademarks of Dolby Laboratories.		uncompressed data formation.
	Byte), is 7 times that of a CD.
Confidential Unpublished Works. ©		NTSC
	Furthermore, the data capacity of a
1992.1997 Dolby Laboratories, Inc. All
		National TV Systems Committee: a
	dual-layer and single-sided DVD is 8.5
rights reserved.
		video standard used in USA.
	GB, a single-layer and double-sided
	DVD 9.4 GB, and a dual-layer and	PAL
Dolby Pro Logic Surround	double-sided DVD 17 GB. The picture	Phase Alternation Line: a video
This is a method of decoding	data uses the MPEG 2 format, one of	standard used in many European
surround recordings that produces	the worldwide standards of digital	countries.
four channels from two-channel	compression technology. The picture
sound. Compared with the former	data is compressed to about 1/40 of
Dolby Surround system, Dolby Pro	its original size. The DVD also uses

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