technical data MERCEDES-BENZ C-Class 2008 W204 Comand Manual

213 Technical terminology
AAC
(A
dvanced Audio Coding)
A means of compressing audio data
which is subject to losses. Based on
the MPEG2 standard.
Bit
(Bi
nary digit)
The smallest unit of digital information.
Bit rate
Measurement of transmission speed.
Indicates the number of ->bits trans-
mitted per unit time.
Bluetooth
®
Wireless personal area networks that
provide a way to connect and exchange
information between devices such as
mobile phones, laptops, PCs, etc. over
a short-range radio frequency.
CD
(C
ompact Disc)
Digital storage medium in disc format.
CD-R
(CD
Recordable)
Writeable ->CD-ROM.
CD-RW
(CD
Rewriteable)
CD which can be read, written and de-
leted.CD text
CD text is an extension of an audio CD,
which contains text information such
as title, artist and name of the individu-
al pieces of music.
->COMAND displays
this information on the corresponding
screens if the selected audio CD con-
tains this information.
COMAND control system
(Co
ckpit Management and Data
System)
Central information and operating unit
for various vehicle functions, such as
radio, DVD changer and other equip-
ment, such as telephone, navigation
system.
Dolby Digital
Optional format for audio data on an
DVD audio or DVD video.
DTMF
(D
ual Tone Multi-Frequency)
DTMF tones control answering machi-
nes or other devices, e. g. for remote
queries.
DTS
(D
igital Theater Sound)
Optional format for audio data on an
DVD audio or DVD video.DVD
(D
igital Versatile Disc)
Digital storage medium in disc format
for storing large data volumes, e.g.
films.
DVD+R
(DVD
Recordable)
->DVD which can be read and written
but not deleted.
DVD+RW
(DVD
Rewriteable)
->DVD which can be read, written and
deleted.
DVD-R
(DVD
Recordable)
->DVD which can be read and written
but not deleted.
DVD-RW
(DVD
Rewriteable)
->DVD which can be read, written and
deleted.
Geo-coordinates
Indicate the geographical position of a
location on the earth's surface.

214 Technical terminology
GPS
(G
lobal Positioning System)
System for geographic position finding.
Satellite signals can be compared by
the receiver in the vehicle with a digital
map (e. g. on CD-ROM) and then used
for position finding and navigation.
Gracenote Media Database
Media database that is stored on
->COMAND’s hard drive.
Gracenote
® music recognition techno-
logy
Music recognition software that is
stored on
->COMAND’s hard drive. If
the selected audio CD does not contain
any
->CD text, ->COMAND can
recognise unknown audio tracks in CD
audio mode with the aid of this
software and depict this in corres-
ponding displays.
GSM
(G
lobal System for Mobile
Communications)
International transmission standard for
mobile phones. This permits you to
make phone calls with your mobile
phone even when abroad. The trans-
mission method is digital.ID3 tag
Additional information which may be
included in MP3 files (e.g. track, artist,
album).
ISO9660
Standard for recording data on CDs.
Joliet
Standard for recording data on CDs.
Kilobyte
Designation for an amount of informati-
on in digital technology.
LOGIC7
®
Multi-channel surround technology
from the professional audio industry,
which plays back 5.1 and stereo recor-
dings in surround quality. LOGIC7
® cre-
ates natural 360° sound characteris-
tics for all seats.
MLP
(M
eridian Lossless Packing)
Optional format for audio data on a
DVD-audio.
MP3
The term used in everyday speech for
->MPEG1 Audio Layer 3.MPEG1 Audio Layer 3
A means of compressing audio data
which is subject to losses.
Multisession
A method for recording data, e.g. for
CDs. Data is written to the CD in a num-
ber of sessions.
Music Register
Memory for the audio main function to
which you can copy music files in MP3
format.
Notebook
Portable personal computer (PC).
NTSC
(N
ational Television Systems Commit-
tee)
TV standard, widespread mainly in the
US.
Folder
Alternative designation for directories.
Data saved on a storage medium can
be organised into directories for impro-
ved clarity. Can be likened to a filing ca-
binet containing a number of folders,
each of which holds a number of docu-
ments.

215 Technical terminology
PAL
(P
hase Alternating Line)
TV standard, widespread mainly in Eu-
rope.
PCM
(P
ulse Code Modulation)
Optional format for audio data on an
DVD-audio or DVD-video.
The audio data are provided in com-
pressed form, similar to ->MP3,
->MPEG1 Audio-Layer 3, but in contrast
are not subject to losses.
PDA
(P
ersonal Digital Assistant)
Small portable computer featuring
functions for managing dates, addres-
ses and appointments, for example.
PIN
(P
ersonal Identification Number)
Personal identification number, to be
entered to activate the telephone.
Provider
Service provider offering access to a
mobile phone network or services
within the network.RDS
(R
adio Data System)
Digital data transmission system for
FM radio stations.
Region code
Because of the region code, video
DVDs can only be played on DVD
equipment with the same code as that
of the ->DVD. The factory setting of the
COMAND is code 2 (

page 75). It can
only play video DVDs which also have
code 2 or code 0 (no region code).
Root directory
The uppermost directory on a data sto-
rage medium.
Scan rate (->MP3)
Indicates the frequency at which volta-
ge samples are taken during the con-
version of an analogue signal into a
digital signal. The analogue-to-digital
converter converts the samples into di-
gital signals.UDF
(U
niversal Disc Format)
Standard for recording data, e.g. for
DVDs.
vCard
An address book entry may contain up
to 8 telephone numbers that are placed
in a vCard (business card). When an
entry of this kind is stored in the mobile
phone’s telephone book, a separate
entry in the vCard is created there for
every telephone number.
Voice Control
A system which can be used to operate
the ->COMAND or the telephone using
speech.
WAV
Standard audio file format for storing
audio on PCs.
WMA
(W
indows® Media Audio)
A means of compressing audio data
which is subject to losses.

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the technical details
of the COMAND system as given
in the data and illustrations
of this Operator’s Manual.
Press time: 06/06/2007
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even of excerpts, is not permitted
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