PRV-9000 Operating Instructions
Aspect Ratio
The width of a television screen relative to its height. Conventional TVs are 4:3
(screen being close to square) while wide-screen models are 16:9 (screen close
to twice as wide as the height)
Chapter
A title on a DVD is divided in to smaller segments called chapters. See also
Title
.
Digital Audio
An indirect representation of sound by numbers. During recording, the sound is
measured at discrete intervals (44, 100 times a second for CD audio) by an
analog-to-digital converter. The converter generates a stream of numbers that
represent the sound. On playback, a digital-to-analog converter generates an
analog signal based on these numbers. See also
Sampling Frequency
and
Analog Audio
.
Dolby Digital
With multi-channel audio, this high-quality surround sound system is used in
many modern movie theaters.
DTS
DTS (Digital Theater System) is a surround sound system similar in quality to
Dolby Digital.
Dynamic Range
The difference between the softest and the loudest sounds possible in an audio
signal without distortion or white-noise. Dolby Digital and DTS soundtracks are
capable of a wide dynamic range thus are popular in move theaters.
MPEG Audio
MPEG is an audio format used on Video CDs and some DVD discs. The PRV-
9000 can convert MPEG audio to the CPM format for wider compatibility with
digital recorders and AV amplifiers. See also
PCM
.
MPEG Video
MPEG video format is used for Video CDs and DVDs. Video CD uses the older
MPEG-1 standard while DVD uses the higher-quality MPEG-2 standard.
Optical Digital Output
A port or jack that carries digital audio signals as light pulses. The special optical
cord may be purchased from most audio dealers.
PCM (Pulse Code Modulation)
PCM is the most common system of encoding digital audio on to CDs and DAT
sources. PCM provides excellent quality but requires excessive amounts of data
when compared to formats such as Dolby Digital and MPEG Audio. For
compatibility with digital audio recorders (CD, MD, and DAT) and AV amplifiers
with digital inputs, the PRV-9000 can convert Dolby Digital and MPEG Audio in to
PCM. See also
Digital Audio
.
PBC (PlayBack Control)
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