Pioneer DV-48AV Additional information Glossary, and Analog audio, Modulation, Digital audio

Additional information

Glossary

Analog audio	Direct representation of sound by an
	electrical signal. See also Digital audio.
Aspect ratio	The width of a TV screen relative to its
	height. Conventional TVs are 4:3;
	widescreen models are 16:9.
Bonus Group	An ‘extra’ group on some DVD-Audio
(DVD-Audio	discs that requires a key number to
only)	access.
Browsable	A feature of some DVD-Audio discs in
pictures	which the user can browse still
(DVD-Audio	pictures recorded on the disc as the
only)	audio is played.
Digital audio	Indirect representation of sound using
	numbers. See also Sampling frequency
	and Analog audio.
DivX	DivX is a media technology created by
	DivX, Inc. DivX media files contain not
	only video but also include advanced
	media features like menus, subtitles,
	and alternate audiotracks.
Dolby Digital	A multi-channel audio encoding
	system developed by Dolby
	Laboratories that enables far more
	audio to be stored on a disc than PCM
	encoding. See also PCM (Pulse Code
	Modulation).
DRM	DRM (digital rights management) copy
	protection is a technology designed to
	prevent unauthorized copying by
	restricting playback, etc. of
	compressed audio files on devices
	other than the PC (or other recording
	equipment) used to record it. For
	detailed information, please see the
	instruction manuals or help files that
	came with your PC and/or software.
DTS	A multi-channel audio encoding
	system developed by Digital Theater
	Systems that enables far more audio to
	be stored on a disc than PCM
	encoding. See also PCM (Pulse Code
	Modulation).
DSD	The Digital Audio encoding system
(Direct	found on SACDs, that expresses the
Stream	audio signals by the pulse density of
Digital)	one bit data.

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EXIF	A file format developed by FUJIFILM for
(Exchangeable	digital still cameras. Digital cameras
Image File)	from various manufacturers use this
	compressed file format which carries
	date, time and thumbnail information,
	as well as the picture data.
File	A tag added to the end of a filename to
extension	indicate the type of file. For example,
	“.mp3” indicates an MP3 file.
HDMI	HDMI (High-Definition Multimedia
	Interface) is a high-speed digital
	interface which has the capability to
	support standard, enhanced, or high-
	definition video plus standard to multi-
	channel surround-sound audio on a
	single digital connection. HDMI
	features include uncompressed digital
	video, a bandwidth of up to 5 gigabytes
	per second and communication
	between the AV source and AV devices
	such as DTVs.
ISO 9660	International standard for the volume
format	and file structure of CD-ROM discs.
JPEG	A standard file format used for still
	images. JPEG files are identified by the
	file extension “.jpg”.
MP3	MP3 (MPEG1 audio layer 3) is a
	compressed stereo audio file format.
	Files are recognized by their file
	extension “.mp3”.
MPEG-4 AAC	MPEG-4 AAC is a compressed stereo
	audio file format. Files are recognized
	by the extention ‘.m4a’.
	Note that some files purchased with
	copyright protection (such as files from
	the iTunes store) may not playback.
MPEG audio	An audio format used on Video CDs
	and some DVD discs.
Packed PCM	A lossless compression system that
(DVD-Audio	enables more PCM audio to be stored
only)	on a DVD-Audio disc than would
	otherwise be possible.
PBC	A system of navigating a Video CD
(PlayBack	through on-screen menus recorded
Control)	onto the disc.
PCM	Digital audio encoding system found
(Pulse Code	on CDs. Good quality, but requires a lot
Modulation)	of data compared to Dolby Digital, DTS
	and MPEG encoded audio. See also

Digital audio. 59

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