Glossary of Acronyms

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

A

English	Chinese	Explanation
ActiveX (A Microsoft open technology for Windows-based applications)		Refers to the entire COM framework of Microsoft, but is now commonly used to refer to ActiveX controls implemented based on standard COM interfaces for object linking and embedding.
ADSL	Asymmetric Digital Subscriber Line
AES (Automatic Electronic Shutter)	Automatic Electronic Shutter	The sensor automatically adjusts sensitivity according to the light source in the lighting field.
AF (Auto Focus)	Auto Focus	The camera lens can automatically adjust to capture the focus of the image.
AGC (Automatic Gain Control)	Automatic Gain Control	Due to low light conditions, when the signal strength falls below preset values, the video signal is amplified by electronic circuitry.
API (Application Program Interface)	Application Programming Interface	The convention for connecting different components of a software system.
ARP (Address Resolution Protocol)	Address Resolution Protocol	Queries the target device's MAC address through the IP address of the target device to ensure smooth communication.
AutoIRIS	Automatic Aperture	The camera automatically adjusts the aperture lens.
AVI (Audio Video Interleave)	A multimedia format	A multimedia file format from Microsoft, containing audio and video data in a standard container that can be played simultaneously.
AWB (Automatic White Balance)	Automatic White Balance	Used in digital cameras to automatically compensate for the type and condition of lighting when capturing scenes.

B

English	Chinese	Explanation
BLC	Backlight Compensation	Automatically adjusts aperture functions during backlight photography to correct the phenomenon of the illuminated subject appearing dark.
BNC	BNC Connector
Broadband	Broadband	A popular term used to describe high-speed data transmission. For networks, this defines that transmission methods share the same carrier for two or more signals.

C

English	Chinese	Explanation
CCD (Charge-Coupled Device)	Charge-Coupled Device	An integrated circuit with numerous arranged capacitors capable of sensing light and converting images into digital signals.
CIF (Common Intermediate Format)	Common Image Transfer Format	A commonly used image transfer format in video conferencing with a resolution of 352 x 288 pixels, supporting video transmission up to 30 frames per second, compliant with ITU H.261 video conferencing data transmission protocol.
CMOS (Complementary Metal-Oxide-Semiconductor)	Complementary Metal-Oxide-Semiconductor	A type of image sensor found in digital cameras. CMOS chips are simpler and cheaper to produce than CCD chips but do not match the quality of traditional images.
Codec	Codec	A device that converts analog audio and video signals into digital signals for transmission and converts received digital signals back into analog formats.
CPU (Central Processing Unit)	Central Processing Unit	One of the main devices of a computer, primarily responsible for interpreting computer instructions and processing data within computer software.
CS-mount		A standard for mounting lenses on cameras, with a distance of 12.5mm from the sensor to the lens.

D

English	Chinese	Explanation
dB	Decibel	Used to measure the intensity of sound, widely used to measure the ratio between two quantities.
DDNS (Dynamic Domain Name Service, It works with dynamic IP addresses)	Dynamic Domain Name System	A system that resolves domain names to dynamic IP addresses.
De-Interlacing	De-Interlacing	A method of converting interlaced (i.e., interlaced scan) image signals into progressive scan image signals.
DHCP (Dynamic Host Configuration Protocol)	Dynamic Host Configuration Protocol	A protocol for automatically allocating dynamic IP addresses to individual devices on a local area network.
DI (Digital Input)	Alarm Input	Can be used to trigger alarms or any events.
DNS (Domain Name System)	Domain Name System	Translates internet domain names and hostnames into corresponding IP addresses, operating only with static IP addresses.
DO (Digital Output)	Alarm Output	Triggers output alarms.
D-SUB (D-sub is used to indicate the type of connector for the VGA interface)	A type of interface	Used to connect VGA connectors.

E

English	Chinese	Explanation
Encoder	Encoder	A device that encodes digital streams into a transmittable format, converting individual signals into composite signals.
Ethernet	Ethernet	A networking technology for local area networks, also used in wireless local area networks.

F

English	Chinese	Explanation
FCC (Federal Communications Commission)	(United States) Federal Communications Commission	Responsible for regulating television and radio broadcasting, satellite and cable television transmission, and telegraphic communications.
Focal Length	Focal Length	The distance between the lens and the focus, expressed as f, e.g., f 2.4 to 24 millimeters.
Frame Rate (The rate at which video frames are displayed on a monitor per second)	Frame Rate	A measure of the number of video frames displayed per second on a monitor; the frame rate for PAL format is 25 fps, and for NTSC format, it is 30 fps.
FTP (File Transfer Protocol)	File Transfer Protocol	A standard protocol for transferring files over a network.
Full-duplex	Full Duplex	Allows simultaneous two-way transmission, receiving and sending audio. This communication mode is similar to a telephone conversation.

G

English	Chinese	Explanation
Gateway	Gateway	A device that connects two different network systems.
GIF (Graphics Interchange Format)	Graphics Interchange Format	The GIF format is commonly used on the internet due to its efficient compression method.
GUI (Graphical User Interface)	Graphical User Interface	A computer operating user interface displayed in graphical form.

H

English	Chinese	Explanation
Half-duplex	Half Duplex	Data can be transmitted bidirectionally but not simultaneously, similar to a walkie-talkie.
HTML (Hypertext Markup Language)	Hypertext Markup Language	A markup language designed for "creating web pages and other information viewable in web browsers."
HTTP (Hypertext Transfer Protocol)	Hypertext Transfer Protocol	The request protocol between client and server.
HTTPS (Hypertext Transfer Protocol Secure)	Secure version of HTTP	A web protocol used to encrypt and decrypt user page requests and the page requests returned by the server.
Hub	Hub	A device that concentrates multiple communication cables.

I

English	Chinese	Explanation
ICMP (Internet Control Message Protocol)	Internet Control Message Protocol	If errors occur in TCP/UDP/IP protocols, ICMP is used to send error messages.
IEEE 802.11	Common Standard for Wireless LANs	A standard defined by IEEE for wireless network communication. Defines the management of packet traffic between wireless devices and supports transmission speeds of up to 2Mbps.
IP (Internet Protocol)	Internet Protocol	The primary network layer protocol used on networks, defining how data is transmitted across networks or systems.
IP Waterproof Rating (IP66 - IP68)	IP Waterproof Rating
IPv4 (Internet Protocol version 4)	Internet Protocol version 4	IPv4 uses a 32-bit address and is the first widely used version.
IPv6 (Internet Protocol version 6)	Internet Protocol version 6	An updated version of IPv4, with IPv6 addresses expressed in 32 hexadecimal digits.
IR Cut Filter	Infrared Filter	A color filter that blocks infrared light to enhance color clarity.
IRIS	Iris, Aperture	A component used to control the size of the lens opening, managing depth of field, lens imaging quality, and controlling light intake in coordination with the shutter.

J

English	Chinese	Explanation
JPEG (Joint Photographic Experts Group)		A type of image compression format, although this compression is lossy.

K

English	Chinese	Explanation
kbps (kilobits per second)	Bit Rate	A unit of network connection speed. 1 kbps = 1,000 bits/second.

L

English	Chinese	Explanation
LAN (Local Area Network)	Local Area Network	A communication network that serves users within a limited geographic area.
Len	Lens
Linux
Lux	Lux	The international unit of illuminance, 1 lux = the brightness of 1 candle.

M

English	Chinese	Explanation
mbps (megabits per second)	Megabit Rate	A unit of network connection speed. 1 mbps = 1,000,000 bits/second.
Megapixel	Megapixel	Used to represent the pixel components of images captured by a camera.
MJPEG (Motion JPEG)		A type of video compression format where each frame is encoded using JPEG compression.
Modem	Modem	An electronic device that modulates digital signals onto analog carrier signals for transmission and demodulates received analog signals to obtain digital information.
Motion Detection	Motion Detection	Used to trigger motion events, allowing for customizable detection windows, names, sensitivity, and percentages.
MPEG-4		A set of compression coding standards for audio and video information.

N

English	Chinese	Explanation
Network Connectivity		The material and logical connections between computers and network devices, such as Ethernet or LAN.
NTP (Network Time Protocol)	Network Time Protocol	A network protocol that synchronizes the clocks of two computers using packet exchange.
NTSC (National Television Standards Committee)	(United States) National Television Standards Committee	A video display standard where NTSC uses 525 television lines per image and a refresh rate of 30 frames per second.

O

English	Chinese	Explanation
Optical Zoom	Optical Zoom	Enlarges image size by adjusting the lens, magnifying the image without distortion.
OSD (On-Screen Display)	On-Screen Display

P

English	Chinese	Explanation
PAL (Phase Alternating Line)	Image Display Standard
PAN	Panning
Pictures-in-Picture	Picture-in-Picture
Pixel (Picture Element)	Pixel	The basic unit of image display.
PnP (Plug-and-Play)	Plug-and-Play	Refers to the ability to automatically detect and configure system resources when a new external device is added to a computer, without needing to reconfigure or manually install drivers.
POE (Power over Ethernet)	Power over Ethernet	A technology that transmits power to devices over twisted pair cables in an Ethernet network.
PPP (Point-to-Point Protocol)	Point-to-Point Protocol	Typically used to establish a direct connection between two nodes.
PPPoE (Point-to-Point Protocol over Ethernet)	Ethernet Point-to-Point Protocol	A point-to-point protocol on Ethernet that encapsulates PPP within Ethernet frames.
Progressive Scan	Progressive Scan	A method where the image sensor continuously retrieves the value of each pixel in the sensor, scanning each line of the image to generate a full-frame image.
Proxy Server	Proxy Server	A server that provides clients with indirect access to other network services.
PSI (Pollution Standards Index)	Pollution Standards Index	An indicator of air pollution conditions.

Q

English	Chinese	Explanation
QCIF (176x120 pixel)		A common image transfer format with a resolution of 176 x 144.
Quad View	Quad View	Displays images recorded by four cameras on one screen simultaneously, with each image occupying 1/4 of the display area.

R

English	Chinese	Explanation
Rackmount Server	Rackmount Server
RAM (Random Access Memory)	Random Access Memory	Internal memory that exchanges data directly with the CPU, also called primary memory.
Resolution	Resolution	Used to determine the print size of an image; changing the resolution does not affect image quality or file size.
RH (Relative Humidity)	Humidity	The percentage ratio of the partial pressure of water vapor to the saturated vapor pressure in a gas.
ROM (Read-Only Memory)	Read-Only Memory	A type of semiconductor memory that cannot be changed or deleted once data is stored.
Router	Router	A network device that forwards packets to their destinations across networks, a process known as routing.
RS485	International standard number for asynchronous serial communication hardware specifications	Data transmission signals are serially transmitted one bit at a time, and the 0/1 data bits are represented by the relative voltage levels between two signal wires.
RTCP (Real-Time Control Protocol)	Real-Time Control Protocol
RTP (Real-Time Transport Protocol)	Real-Time Transport Protocol
RTSP (Real-Time Streaming Protocol)	Real-Time Streaming Protocol	A multimedia streaming protocol used to control audio or video streams.

S

English	Chinese	Explanation
S/N Ratio (Signal to Noise Ratio)	Signal to Noise Ratio
Sensor	Sensor
Server	Server	A computer program that provides services to other computer programs and their users.
SMTP (Simple Mail Transfer Protocol)	Simple Mail Transfer Protocol	The main protocol for sending emails between servers on the internet.
SNTP	Simple Network Time Protocol

T

English	Chinese	Explanation
TCP (Transmission Control Protocol)	Transmission Control Protocol
Thin Server	Thin Server
Tilt	Tilt	To rotate the camera upward or downward.
TVL (TV Lines)	TV Lines	Used to define the resolution of analog cameras.

U

English	Chinese	Explanation
UDP (User Datagram Protocol)	User Datagram Protocol	A type of connectionless transport protocol.
UPnP (Universal Plug and Play)	Universal Plug and Play	A network protocol configuration that allows devices to be added or removed even when powered on.
USB (Universal Serial Bus)	Universal Serial Bus Interface	A plug-and-play interface for connecting computers and peripheral devices.

V

English	Chinese	Explanation
Vandal-Proof	Vandal-Proof	Completely prevents damage to cameras from external forces, making them suitable for outdoor surveillance.
Varifocal Lens	Varifocal Lens	A type of lens with variable focal lengths that can be adjusted manually.
Video Encoder	Video Encoder	Refers to two algorithms that work together for compression and decompression.
VPN (Virtual Private Network)	Virtual Private Network	A common communication method for connecting private networks used by medium to large enterprises or groups.

W

English	Chinese	Explanation
WAN (Wide Area Network)	Wide Area Network	A network consisting of many local area networks across a large geographic area, such as the internal networks of a large company that connects branches in different locations.
Weather-Proof	Weather-Proof	Protects cameras from adverse environmental conditions.
Web Server	Web Server	A server within the World Wide Web.
WLAN (Wireless LAN)	Wireless Local Area Network	A local area network connected via wireless links.

X

English	Chinese	Explanation

Y

English	Chinese	Explanation

Z

English	Chinese	Explanation
Zoom Lens	Zoom Lens	A composite lens type.

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