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Glossary
Composite (CVBS)
- Low quality analogue
video signal format. Can carry PAL signal..
Component (YPbPr)
- Higher quality analogue
video signal format. Splits the video signal into
three components to maintain signal clarity
and capable of carrying high definition video
up to 1080p. Component is rapidly being
phased out in favour of digital video via HDMI.
Aspect ratio
: The ratio of vertical and horizontal
sizes of a displayed image. The horizontal vs.
vertical ratio of conventional TVs is 4:3, and
that of widescreens is 16:9.
Disc menu
: A screen display prepared for
allowing selection of images, sounds, subtitles,
multi-angles, etc recorded on a DVD.
JPEG
: A very common digital still picture
format. A still-picture data compression system
proposed by the Joint Photographic Expert
Group, which features small decrease in image
quality in spite of its high compression ratio.
XviD
: MPEG-4 based video compression
technology, that can shrink digital video to
sizes small enough to be transported over the
internet, while maintaining high visual quality.
Container.
The multimedia container file is
used to identify and interleave different data
types. Simpler container formats can contain
different types of audio codecs, while more
advanced container formats can support
multiple audio and video streams, subtitles,
chapter-information, and meta-data (tags) —
along with the synchronization information
needed to play back the various streams
together. There are many container formats,
such as AVI, Matroska (MKV), MOV, MP4, OGM,
WAV, etc.
Analog:
Sound that has not been turned into
numbers. Analog sound varies, while digital
sound has specific numerical values. These
jacks send audio through two channels, the
left and right.
Digital
: Sound that has been converted into
numerical values. Digital sound is available
when you use the DIGITAL AUDIO OUT
COAXIAL or OPTICAL jacks. These jacks send
audio through multiple channels, instead of
just two channels as analog does.
PCM (Pulse Code Modulation)
: A system for
converting analog sound signal to digital
signal for later processing, with no data
compression used in conversion.
S/PDIF
- Format for carrying audio digitally over
either optical (TOSLINK) or electrical (Coaxial)
cable. Can carry high quality DTS or Dolby
Digital audio.
TOSLINK
- Standardised optical fibre
connection system invented by Toshiba.
Typically used to connect the Player to a AV
receiver for pass-through of HiFi audio. When
we refer to digital optical we mean S/PDIF via
TOSLINK.
Dolby Digital (or AC-3)
- It isa surround sound
system developed by Dolby Laboratories
containing up to six channels of digital
audio (front left and right, surround left and
right, center and subwoofer). It is a required
standard of both Blu-Ray and DVD and the
most widely supported. It is a ‘lossy’ format
so is of a lesser quality than the studio
original. Surround sound up to 5.1 channel is
supported. The Dolby Digital audio track can
either be decoded (downmixed) to stereo
in the Player or digitally bitstreamed direct
(passthrough) to a compatible AV receiver (via
TOSLINK/Coaxial/HDMI) for decoding.
DTS (Digital Theater System)
- is a required
standard of both Blu-Ray and DVD players
and is widely regarded to produce audio
quality superior to Dolby Digital. Up to 5.1
channel surround sound is supported. DTS is
a ‘lossy’ compression standard so the audio
is of a lesser quality than the original studio
recording. The DTS audio track can either be
decoded (downmixed) in the Player to stereo
or digitally bitstreamed direct (passthrough)
to a compatible receiver (via TOSLINK/Coaxial/
HDMI) for decoding.
Summary of Contents for AV290DVD
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