Glossary - Sony SNC-VB632D User Manual

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Glossary

ActiveX control
A component program object that can be used with web
pages or other application programs. The technology for
creating ActiveX control is part of software developed
by Microsoft.
Bandwidth control
To limit the amount of transmitted data.
Bit rate
The rate at which data bits are transmitted.
Capture
To send audio and video converted to digital data from
video devices to a computer.
CBR
CBR stands for Constant Bit Rate control. When you
select this setting, bits will be consumed at a constant
rate.
Codec
Software/hardware for coding/decoding video and audio
data.
Contrast
The difference in tone between the lightest and darkest
portions of the image.
Default gateway
Device that can be used to access another network.
DHCP server
Acronym for Dynamic Host Configuration Protocol
server. The IP address of a terminal without an
individual IP address can be automatically distributed by
the Dynamic Host Configuration Protocol (DHCP). The
DHCP server assigns the IP addresses to the terminals.
Digital certificate
An electronic certificate that a CA (Certificate
Authority) attests that a public key to cancel a secret
code is issued by an authentic publisher.
DNS server
Acronym for Domain Name System server. As an IP
address required for connecting to the device on an IP
network is numerical and difficult to remember, the
Domain Name System was established. A domain name
is alphabetic and is easier to remember. When a client
computer uses a domain name to connect to another
computer, it asks a DNS server to translate the name into
the corresponding IP address. The client computer can
then obtain the IP address of the computer to be
connected.
e-Varifocal
Zooming in/out function of an image by enlarging with
a software without using an optical zooming function.
The image quality degradation is less than the Solid PTZ
because it does not use the digital zoom area.
Frame rate
The number of frames of a moving image that can be
transmitted per a second.
HTTP port
A port used to communicate between the web server and
the web client, such as a web browser.
H.264
An image compression format. The standard written by
the JVT (Joint Video Team) a joint organization for
standardization (composed of ISO and ITU-T), is
capable of transmitting video data at a higher
compression rate than that of MPEG4.
IP address
Acronym for Internet Protocol Address. An individual
IP address is basically assigned to each piece of
equipment connected to the Internet.
JPEG
Acronym for Joint Photographic Expert Group. The still
image compression technology or standards of ISO
(International Organization for Standardization) and
ITU-T. Popularly used as an image compression format
on the Internet, etc.
MAC address
A network address that uniquely identifies each LAN
card.
Multicast
The class D IP address assigned between 224.0.0.0 and
239.255.255.255. Using this IP address enables you to
transmit the same data to multiple equipment.
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Glossary