Xoro HSD 7070 - Инструкция (Страница 76)

GLOSSARY
76
English
DVD player & videoformat
CD
CVBS
DivX
A CD (Compact Disc) is a metal-coated plastic disc. It has a diameter of 12 cm and a thickness of about
1,2 mm. It was developed by Sony and Philips in 1985. The advantages are digital storage of music
enabling very natural sound reproduction. Beyond this, the data is stored more compact, the handling
is easy. The long lifetime of the media and the fact that usage does not decrease quality made the CD
the ideal storage media.
In the meantime, 12 different storage media have been developed from the first CD. The mostly used
are CD-DA (Compact Disc - Digital Audio) , CD-ROM (Compact Disc - Read Only Memory), and the
DVD (Digital Versatile Disc).
One can store about 74 to 80 minutes of music on a CD (-DA). This is equal to 650 to 700 MB
Signal transmission is performed touchless with a laser beam. The CD is being read from the middle to
the outer side. The data or music is recorded in a spiral from the middle to the outer side.
A CD has pits and lands, the distance is about 1,6 mm. The laser light created by a laser diode passes
different mirrors and prisms and then is focused by a lens to a laser beam. This laser beam scans the
data spiral of the CD. On the pits, the laser beam is reflected in another direction and is detected by a
photocell. The photocell transmits the signal to a microprocessor, which converts the digital data to an
audio signal. The rest is done by the sound system.
Composite Video Interface. The video signal is transmitted via a single signal line. CVBS should only
be used, if your playback device does not offer other interfaces for connection with you Xoro TV set, as
CVBS due to technical reasons delivers worst quality of all available interfaces (please also refer to
YUV, S-Video, SCART and RGB). The CVBS interface can easily be identified from the yellow colour
of the RCA jack.
DivX is a new high quality video codec, which is based on MPEG-4 standard and combined with MP3
audio. Originally, the DivX -Codec was a Microsoft codec (MPEG-4 v3). The official codec only used
ASF format (no AVI) or WMV format with Windows Media Encoder 7. The official codec had a bitrate
limit, which was removed on DivX .
On the next stage of development, the codec was developed completely new and is now 100% MPEG-
4 compliant. The new codec was called DivX
4/5 and can be obtained for free at www.divx.com. This
codec is also compatible to videos encoded with the old DivX codec (DivX 3.11). Today, DivX is just
a brand name for the MPEG-4 encoder/player from DivX Networks that lives from the fame of early
DivX days.
Videos encoded with DivX 4/5 are fully MPEG-4 compliant and theoretically can be played on any
MPEG-4 enabled DVD player.
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DTS ®
DTS is a coding standard similar to Dolby Digital . DTS Digital Surround is a multichannel surround
system from Digital Theatre Systems. Similar to Dolby Digital it uses up to 5.1 channels. Different from
Dolby, the data rate can be far above 1 Mbit/sec so the sound is not compresses as strong as in Dolby
Digital® resulting in a higher sound quality.
The frequency range is from 20Hz to 20kHz at 20Bit, but the subwoofer channel only transmits
frequencies below 80Hz. The coding system also is called CAC.