Glossary / Acronyms for Video Surveillance

By: IPVM Team, Published on Feb 10, 2020

This directory provides definitions and explanations for over 70 common video surveillance industry terms, including links to related IPVM tutorials and guides.

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This directory will be continuously updated. If there is a term you want to be included that is not, post a comment below or email us at info@ipvm.com.

[This is part of our new Video Surveillance 101 course that starts this month.]

AHD - Analog High Definition is both a general term and the name of a specific variant/ implementation of megapixel analog, in contrast to the more widely used megapixel IP. See HD Analog vs IP Guide

ANPR - Automatic Number Plate Recognition, also called LPR (License Plate Recognition), in some parts of the world, is software that analyzes and detects the characters on plates. Typically specialized cameras and positioning is required to deliver this.

API - Application Programming Interface is a means whereby systems (e.g., IP cameras or recorders) allow 3rd party systems to integrate. Within video surveillance, most APIs are not public and often require NDAs to access, which is different than many modern cloud or web systems. When systems upgrade, often the API is broken causing problems for 3rd parties integrating, see our API / SDK Tutorial.

AOV - Angle of View describes the camera's coverage area in degrees. It is often used interchangeably with field of view (FOV), though FOV typically refers to the scene's width, while AOV refers to angle. See our Camera Field of View (FoV) Guide

ASIS - Originally stood for the American Society for Industrial Security, the organization is now called ASIS International, is an association focused on security end-users. They run an annual show called GSX (Global Security Exchange) that is the second largest in the US. Beyond the show that has video surveillance exhibitors, ASIS does not do much with video surveillance.

Aspect Ratio - The ratio of image height to width. In surveillance, 16:9 is the most common aspect ratio as it is used by HD 720p and 1080p sensors, as well as most monitors in use today. 4:3 and 3:2 ratios are also in use in some cameras, though less commonly than previous. See 16:9 vs 4:3 Video Aspect Ratio Statistics.

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AWG - American Wire Gauge is a standard scale of wire gauge used predominantly in North America, though in some other parts of the world. It is most commonly referred to when specifying low voltage power, e.g., "two-conductor 16 AWG" or in Category cable (such as Cat 5e or 6), which typically use 24 AWG conductors.

BLC - Back Light Compensation is a digital image adjustment which adjusts exposure to attempt to approve details on subjects in front of strong backlight. However, it uses a single exposure for the entire scene, so brighter areas may become washed out. It is not a substitute for WDR.

CBR - Constant Bit Rate is a camera streaming mode that aims for a constant bandwidth level while video quality is allowed to vary, which may cause image degradation in busy scenes if CBR bitrate is set too low. Contrast to VBR/MBR, see our Surveillance Streaming Guide.

CCD - Charge Coupled Device, a type of image sensor which reads pixels of an image one by one. CCDs were previously the most popular sensor type used in surveillance, but have been replaced by CMOS in the vast majority of cameras (see CMOS below). See Surveillance Camera Imager Tutorial.

CCP / CPC - China Communist Party or Communist Party of China. See Hikvision and the China Communist Party and Hikvision And The Chinese Government.

CMOS - Complimentary Metal Oxide Semiconductor. In surveillance, a CMOS sensor reads pixels of an image all at once. CMOS sensors are used in most cameras today, due to lower production cost and advances in low light, WDR and high resolution performance. See Surveillance Camera Imager Tutorial.

CNN - Convolutional Neural Network. CNNs are used in deep learning to classify images, perform object recognition, and detect image similarity. See our Deep Learning Tutorial For Video Surveillance.

dB - Decibel. Decibels are a measurement of the difference in two power levels, most commonly used to specify WDR in surveillance (e.g., 58dB, 130dB, etc.), though with questionable accuracy and no independent validation. They are also used to measure audio levels, such as in public address or life safety applications.

Deep Learning - An algorithm which goes through a number of hierarchical classification stages, effectively filters, to reach decisions, most commonly human, vehicle, animal, etc., classifications in surveillance. Deep learning analytics are becoming increasingly common in 2020 and beyond. See our Deep Learning Tutorial for examples.

DHCP - Dynamic Host Configuration Protocol assigns an IP address to devices on a network within a specified range (called a "scope"). Most IP cameras default to using DHCP to speed initial setup of devices. See the Dynamic vs. Static IP Address Tutorial.

DNR - Digital Noise Reduction uses software (typically on board cameras) to attempt to reduce image noise present in low light surveillance images. There are two key types of DNR, spatial (within a single frame) and temporal (comparing two or more frames) which are typically combined in what is known as "3D DNR." Applying excessive DNR may introduce motion blur, a problem on some modern models. See our DNR tutorial.

DVR - A Digital Video Recorder receives video from connected analog sources (typically SD or HD analog cameras), encodes it, and stores it to disk. Contrast this with an NVR (network video recorder) which captures network streams from IP cameras. Note that some DVRs are referred to as "hybrid" and may record both analog and IP cameras.

DWDR - "Digital" Wide Dynamic Range is essentially a contrast adjustment on multiple regions of the scene, instead of the overall image. Can sometimes be referred to as "Electronic" WDR, and is better in some scenes than doing nothing, but does not compare to "true" WDR performance. See Wide Dynamic Range (WDR) Guide.

EIS - Electronic Image Stabilization is a camera feature which attempts to minimize blurring and compensate for device vibration, such as cameras mounted on tall poles. This is a common feature in high end cameras today. Some third parties offer software or hardware based EIS add-ons, as well, though these are very rarely used.

EOL - End-Of-Life describes products which have been discontinued by the manufacturer. This means the product is no longer sold and support may be limited, either immediately or in some period of time.

F/F-Stop - F-stop measures the relative amount of light that a lens passes, expressed on a logarithmic scale (e.g, F1.4, F2.8, etc.). The lower the F number, the more light the lens passes. When lenses / cameras specify F numbers, they always provide the lowest F number that the lens supports when the iris is all the way open. See our F-Stop Tutorial and F-Stop Calculator.

Fixed Lens - Fixed lenses are locked into one focal length, e.g., 2.8mm, 4mm, 12mm, etc. Their main advantages are simplicity (since no manual adjustment is required) and size, though they are less flexible than varifocal lenses and cannot be fine tuned to fit specific desired fields of view. For more information regarding lenses and focal lengths, please see IPVM's Lens Focal Length Tutorial.

FPS - Frames Per Second. The number of images a camera captures and/or transmits in one second. 30 FPS is typically referred to as "full frame rate", while average is between 10-15 in surveillance. See Frame Rate Guide for Video Surveillance.

FOV - Field of View. In simple terms, refers to what a camera can "see." However, there are many factors into how a FOV is calculated, and the impacts of lenses and sensor types further complicate how a FOV is measured and compared. Please refer to IPVM's Field of View Guide for additional information. Note that FOV is often used interchangeably used with Angle of View (AOV), but AOV is the angle, while FOV is the width.

Frame Types (I-Frame, P-Frame, B-frame)

I-frames, P-frames, and B-frames are different types of frames used in encoding surveillance (and other) video in the H.264, H.265, and MPEG-4 standards.

  • I-Frame - An I-frame (or inter-coded picture) contains the entire image. In surveillance, this means that a camera will encode the entire image as is, and not the predicted changes as seen with P or B frames.
  • P-Frame - A P-frame can be thought of as "predicted picture", which holds only the changes in the image from the previous frame. Take someone walking through a static scene for instance. Only the person's movement needs to be encoded, not the background.
  • B-Frame - A "Bidirectional predicted picture" is similar to a P-frame. However, B-frames can use one, two, or more than two previously decoded pictures as references during decoding. This typically means fewer bits for encoding than either I or P-frames.

See our Surveillance Codec Guide for more on these frame types.

GDPR - the European Union's General Data Protection Regulation, this covers and restricts how personal information is used, impacting video surveillance, in particular on biometrics like facial recognition. See IPVM's GDPR Guide For Video Surveillance.

GOP / GOV - Group Of Pictures / Group Of Video. Refers to a collection of frames, beginning with an I-frame, including all subsequent P and B frames, until the next I-frame. For example, a GOP of 15 would include one I-frame, followed by 14 P and/or B frames, depending on structure. See our Surveillance Codec Guide for more information.

HD-CVI - High Definition Composite Video Interface is an HD analog standard developed by Dahua for transmission of HD video over coax. Originally a proprietary technology, multiple manufacturers now offer "universal" DVRs or encoders which support AHD, CVI, and TVI. See our Analog HD vs. IP Guide for more details.

HD-TVI - High Definition Transport Video Interface is an HD analog standard developed by chip manufacturer Techpoint and adopted by Hikvision, who remains the largest manufacturer of TVI product. See our Analog vs. IP Guide for more information.

HDD - Hard Disk Drive. The most commonly used storage medium in surveillance, used in DVRs and NVRs.

Hikua - a portmanteau of the words Hikvision and Dahua, this is a simplified way to refer to the two giant PRC manufacturers when discussing trends or actions that the two companies are both similarly engaged in

HLC - High Light Compensation. A feature included in some IP cameras which attempts to reduce the effects of strong light sources, such as headlights, which would otherwise wash out the image.

IK - IK ratings are standard measurements of impact resistance defined in EN 62262, ranging from IK00 to IK10, though manufacturers have tested beyond IK10, as well, calling it IK10++. In surveillance, these ratings describe vandal resistance of cameras, with IK10 generally referred to as "vandal resistant", though there is no standard which requires this. To see more about vandal/IK ratings, see the Camera Form Factor Guide.

IP (Ingress Protection) - Ingress Protection (IP) ratings dictate how hardened a device (e.g., cameras is against dust, water and other debris or pressure. IP66 rating or higher is typically referred to as "weather proof", though there is no standard for this terminology. IP67 and IP6K9K are ratings beyond IP66.

IPC - An Internet Protocol Camera, or IP Camera, is a digital surveillance camera that is able to send and receive information over a network. The term 'IPC' is used in some regions of the world as an acronym and often used in many manufacturers' part numbers.

IPVM - Originally IP Video Market Info, we just call ourselves IPVM. We are the world leader in researching and testing video surveillance, widely cited around the world for our work.

IR - Infrared, light above the visible spectrum of humans, ranging from 700nm to 1000nm. IR is used in integrated and external illuminators, typically in the 850nm or 940nm wavelengths, to provide light which cameras can "see" but humans cannot. See our IR Surveillance Camera Guide and recent Integrated IR Camera Shootout.

LAN - Local Area Network, a collection of devices connected together in one physically location, e.g., an office or school. LAN is used to refer to one facility's network, in contrast with WAN (wide area network), which refers to a collection of LANs connected across some distance. See Bandwidth Fundamentals For Video Surveillance.

LPR -License Plate Recognition, also called ANPR (Automatic Number Plate Recognition), in some parts of the world, is software that analyzes and detects the characters on plates. Typically specialized cameras and positioning is required to deliver this.

MAC Address - A Media Access Control address is a specific identifier assigned to a Network Interface Card, or NIC. It is is a hardware identification number that uniquely identifies each device on a network. See Network Addressing for Video Surveillance Guide.

Machine Learning - Uses pre-programmed instructions to allow a computer to recognize an image of an object. When a programmed algorithm is then fed video, it will look for these specified parameters. The difference with deep learning is the algorithm should come up with criteria on its own that is very similar to what the machine learning algorithm was manually programmed with. See our Deep Learning Tutorial for additional information.

MBR - Maximum Bit Rate, which is a streaming mode which allows the camera's bit rate to vary up to a specified maximum, often referred to as a cap, while maintaining a constant video quality level. Review the various streaming modes in IPVM's Surveillance Streaming Guide.

MP - Megapixel directly means "a million pixels". In surveillance, multi-megapixel cameras such as 1080p/2MP, 4MP, 5MP, 4K/8MP, etc., are common, and the "MP" quantifier details the resolution of a camera. See our resolution tutorial for in-depth analysis and examples.

MSRP - Manufacturer Suggest Retail Price, also referred to as "list price", this is the published price of a product furnished by a manufacturer. Actual cost and sell price are typically calculated based on discounts off of MSRP. See Surveillance Pricing: MSRP and Discounts.

NAS - Network Attached Storage. In surveillance, NAS refers to a small device used to store video on the network. Multiple recorders (VMS/NVR) may record to a single NAS.

NDAA - The US National Defense Authorization Act of 2018 banned the use of major surveillance manufacturers (including Dahua, Hikvision and Huawei) in various applications. In August 2019, this started with the US federal government ban of purchasing such equipment. In August 2020, as currently proposed it is scheduled to ban the use of federal funding for such products as well as those using those products from selling to the US government. See ban law post, white house proposes post.

NEMA - National Electrical Manufacturer Association. In surveillance, the term NEMA typically is used to refer to specific weather ratings of enclosures, such as a NEMA 4X enclosure, which may be used outdoors or in wet locations. It is related to, but not the same as, IP ratings (IP66, IP67, etc.).

NIC - Network Interface Card. A component which allows a device to connect to a network, typically Ethernet. This is typically integrated in modern PCs/servers, and found in IP cameras.

NTP - Network Time Protocol. Used to synchronize the time of devices to a reference time source or server. NTP is important in surveillance as improper time stamps may impact whether surveillance video is admissible as evidence in a court of law. See NTP / Network Time Guide For Video Surveillance

NVR - A Network Video Recorder encodes and stores video from cameras on the network, in contrast to DVRs which record analog video from locally connected cameras. NVR is sometimes used to describe a VMS server, as well, though VMSes typically use a standard operating system and third party hardware while NVRs are typically proprietary hardware and software. See Software Only VMS vs NVR Appliances.

MBR - Maximum Bit Rate is a streaming mode that allows the camera's bit rate to vary but maintains a constant video quality level up to a certain maximum bandwidth level. This is the most commonly used bit rate control that benefits from allowing adjustment but limiting wasteful spikes. See: CBR vs VBR vs MBR - Surveillance Streaming.

ONVIF - Stands for Open Network Video Interface Forum. ONVIF is a trade organization founded by Axis, Bosch, and Sony in 2008 which has developed API specifications for integrating security products, and collected into a number of "Profiles" which contain specific sets of functionality:

  • Profile S: S is the oldest and most broadly supported. Covers video streaming and the basics of sending video from a camera to a VMS/recorder.
  • Profile G: G supports video storage. This profile can support retrieving and sending stored video from and IP camera with on-board video to a VMS/recorder.
  • Profile Q: Q was created to simply discovering cameras and improve security by eliminating default passwords. While officially adopted, has little manufacturer support.
  • Profile T: T improves integration of H.265 codec, motion detection, analytics, and other events, as well as camera settings such as exposure, focus, contrast, etc.

See our ONVIF Tutorial for more detailed information.

PoE - Power Over Ethernet (PoE) is a standard for supplying low voltage power over the same cable used to transmit Ethernet data. PoE is supported and used, in practice, in almost all professional IP cameras and installations. See PoE for IP Video Surveillance Guide.

PPF (PPM) - Pixel Per Foot (Pixel Per Meter) is a metric of image quality, obtained by dividing horizontal pixel resolution (e.g., 1920 in a 1080p camera) by field of view width (e.g., 32'). PPF acts as a baseline to get a sense of potential performance, but does not account for outside influences such as lenses, compression, scene brightness, low light performance, and others. To read more into this complex but critical metric, see our PPF/PPM Guide.

PRC - The People's Republic of China. IPVM generally refers to the 'PRC' rather than 'China' or 'Chinese' to avoid any confusion over ethnicity or Taiwan, which is the Republic of China (ROC).

PSIM - The objective of Physical Security Information Management is to integrate / converge various systems (such as access control, fire, intrusion detection, perimeter, video surveillance) within a single monitoring application. The systems are costly and complex and restricted by issues integrating with disparate proprietary products. PSIM has remained a niche, see PSIM Problems and Why PSIM Will NEVER Be Popular.

PTZ - Pan/Tilt/Zoom. PTZ cameras contain a motorized mechanism which allows it to move in multiple directions and change its angle of view. As the name implies, the cameras can move horizontally left and right, vertically up or down, and zoom the lens in or out. Overall usage has declined significantly in the past decade as multi-imagers and multi-megapixel cameras have expanded, but PTZs are still popular in some applications. See our PTZ Camera Guide.

PTRZ - Pan/tilt/roll/zoom. PTRZ cameras are similar to PTZ cameras, but include the ability to rotate the camera's lens clockwise and counter-clockwise. Unlike PTZ models, however, this capability is not intended for tracking of subjects or tours, but instead as an installation feature. PTRZ cameras are slow relative to true PTZs and are not warrantied for full time PTZ use.

Q - Stands for quantization, a measurement of compression on a standard logarithmic scale from 0 to 51, with lower numbers meaning less compression, and thus higher image quality. For more information about this complex topic, refer to IPVM's Video Quality / Compression Tutorial.

RAID - Redundant Array of Inexpensive Disks. It is used to connect multiple secondary storage devices and use them as a single storage space or media. RAID is broken into several levels with the goal of distributing data across several disks, and above RAID 0, can provide redundancy should a disk fail.

RFP - Request For Proposal. This generally outlines the requirements for a specific project. Good RFPs are hard as they can be expensive and time-consuming to do accurately plus many sellers attempt to rig RFPs for their own product's specifications.

RMA - Return Merchandise Authorization is the process of returning a product to receive a refund, replacement or repair. Returning products normally require the user to speak with technical support and go through whatever troubleshooting steps are necessary before an RMA is issued.

RTSP - Real Time Streaming Protocol. Surveillance cameras utilize RTSP streams as a link between a camera and RTSP viewers such as VLC or VMS client software.

SAN - Storage Area Network. A SAN technically describes an entire network, but is typically used to describe a network storage server, similar to simpler NAS (network attached storage), but generally larger and using different protocols for increased performance.

Smart Codec - Smart codecs dynamically adjust compression, I-frame interval (GOP), frame rate, and other streaming factors based on scene complexity in order to reduce required bandwidth. Smart codecs have had the greatest impact on network bandwidth of any technology in surveillance, with savings of 95% possible compared to standard H.264/H.265. See our Smart Codec Guide.

Smart IR - A term used to describe features which compensate for moving objects or scene changes in integrated IR cameras. Smart IR may mean IR power is automatically adjusted, dimming to prevent overexposure of near objects and returning to full power for those further away. However, it may simply refer to a faster exposure adjustment used to compensate in integrated IR models, or in some cases may be used to describe cameras which adjust their illumination angle based on lens zoom. There is no standard for this terminology. See our IR Surveillance Camera Guide.

SNMP - Simple Network Management Protocol is used for basic monitoring of devices over the network. It may be used to monitor bandwidth, OS service status, uptime, and more, and provide alerts to users of device downtime when using a network monitoring system. See our SNMP / Network Monitoring For Surveillance.

SoC - System on a chip is the core computing component of IoT devices like IP cameras and recorders. Generally, the choice of SoC impacts capabilities like analytics, dewarping, multi-imager, codec, etc. and is a major driver of IoT device cost. Specifically, SoCs have become a concern as US government action against Huawei impacts the wide usage of Huawei Hisilicon chips.

Static (IP Address) - Static IP addresses on network devices mean a unique address is manually assigned to each camera. This results in IP devices retaining the same IP address should it become disconnected on a network. This is the recommended method of assigning IP addresses in most networks. See Network Addressing for Video Surveillance Guide

Thermal - Thermal surveillance cameras use infrared radiation to produce an image, meaning no light is required to produce an image. Additionally, they are able to produce images in adverse conditions such as smoke and fog. However, since they do not see visible light, thermal cameras do not reproduce color, and fine details between areas or objects of similar temperature are lost. Some thermal cameras include visible light imaging, and some uses of thermal are expanding to measuring human body temperature.

Trunkslammer - At a basic level, trunkslammer refers to someone who works out of their car (akin to the U.K. term "Man in the Van"). Within the security industry, trunkslammer usually has negative connotations, most of which imply small-scale installers looking to make a quick buck installing a cheap surveillance or security system. Related: You Might Be A Trunkslammer If....

UPS - Uninterruptible Power Supply, a backup power system consisting of batteries and an inverter used to maintain power during outages. Battery run time may last for a few minutes up to a few hours, depending on size. See IPVM's UPS Backup Power guide for more information.

Varifocal Lens - Varifocal lenses allow adjustment of the focal length, either adjusted manually using two rotating rings or with a motorized mechanism. Varifocal lenses are specified using their focal length range, such as 2.8-10mm or 25-50mm. Varifocal models are flexible, as they can be adjusted to fit the field of view as needed over fixed lenses. For more information regarding lenses and focal lengths, please see IPVM's Lens Focal Length Tutorial.

VCA - Video Content Analysis (or sometimes referred to as Video Content Analytics), most often simply referred to as "analytics." Analytics may refer to any of a number of rules, such as intrusion, people detection, LPR, etc. Analytics in new models are increasingly based on Deep Learning (see above) for increased accuracy. See our IP Camera Analytics Shootout.

VBR - Variable Bit Rate, a streaming mode that allows the camera's bit rate to vary but maintains a constant video quality level. Contrast to CBR and MBR. See: CBR vs VBR vs MBR - Surveillance Streaming.

VMD - Video Motion Detection. A term to describe generally less sophisticated, less accurate attempts to detect if motion is occurring, most often based simply on the intensity and number of pixels changing. It can be better than recording continuously but it generally detects lots of noise and other irrelevant activity. There are many attempts to improve VMD, most notably video analytics / VCA.

VMS - Video Management Software is installed on COTS (Commercial Off-The-Shelf) hardware in contrast to NVRs / DVRs where the video management software is bundled / sold with the hardware.

VOIP - Voice over Internet Protocol (IP) describes any of a number of methods which transmit voice via a network/the internet. In surveillance this is most commonly used in regards to intercoms/doorphones, a growing segment of specialty IP cameras.

VSaaS - Video Surveillance as a Service is a general term for cloud-based video surveillance, including both hosted (video stored in the cloud), managed video (video stored locally) and hybrid approaches. There is no standard for the term but it is widely used to express the general approach.

  • Hosted Video - A type of VSaaS where video is both stored ('hosted') and managed in the cloud. This eliminates having to keep video and recorders on-site but requires sufficient bandwidth to move video to the cloud. In consumer applications, this is increasingly common but in commercial, with large camera counts, this is less common.
  • Managed Video - A type of VSaaS where video is 'managed' in the cloud but stored locally at the customer site. This is the most common type of VSaaS today as it allows for benefits of cloud management (easier remote access, firmware updates, etc.) without having to transfer all video to the cloud.

WDR - Wide Dynamic Range, in video surveillance, can impact the quality of images in scenes with strong lightning contrast (e.g., a door opening towards the rising sun). Different techniques, mostly notable multiple exposures, are used to improve WDR image quality. Overall performance has improved over the last decade with key quality differences existing in how well cameras deal with moving objects. See our WDR tutorial and WDR shootout.

Zoom Ratio - Zoom ratio is formed simply by dividing the camera's maximum focal length by its minimum. For example, a ptz with a focal length of 4.3mm - 129mm would mean a zoom ratio of 30X (129 ÷ 4.3 = 30). However, since lenses have differing wide/telephoto focal lengths, two cameras with the same ratio may have very different fields of view. For more information regarding PTZ's, see IPVM's PTZ Camera Guide.

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Comments (24)

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I would add GPU and SoC to this list. Granted, they are not super common, but that is probably more reason to have them defined relative to security applications.

#1, thanks, I've added SoC:

SoC - System on a chip is the core computing component of IoT devices like IP cameras and recorders. Generally, the choice of SoC impacts capabilities like analytics, dewarping, multi-imager, codec, etc. and is a major driver of IoT device cost. Specifically, SoCs have become a concern as US government action against Huawei impacts the wide usage of Huawei Hisilicon chips.

I've asked the team to add GPU and others suggested here.

Waiting to see who copies this list onto their shop drawings....

Architect asks about Trunkslammer...

No definition of Hikua?

No, not really relevant any more ;)

Lol, Hikua is worth having since it is referred to by people here and elsewhere, so added;

Hikua - a portmanteau of the words Hikvision and Dahua, this is a simplified way to refer to the two giant PRC manufacturers when discussing trends or actions that the two companies are both similarly engaged in

Not sure when Dearing created it but if he recalls, I can like to his first usage.

See also the extra portmanteau of the portmanteau... Hikuaview, combining the "big 3" from China.

additional triple portmanteau... Hikuawei, combining the ”bad 3” from China.

If the first usage was on IPVM, it should be easy to find...

SELECT * FROM Comments WHERE Comments.Body LIKE 'hikua'

But without database access, it's hard to find because you limit browsing of search results to 3 1/3 pages (100 results), even if there are more results found :(

Does anyone know what HLI is/means in relation to working with a VMS and video feed?

Can you give some context to that? Use it in a sentence? There are a couple meanings for it which may apply which would help us define it in this context.

Sure. “what trigger, event, action is visible from the client after you have performed your analytic? Is it a HLI into milestone within the camera video feed?”

John,

This is a great start. I suggest adding access control, intrusion, IP, telecom and construction abbreviations like: ACAMS, ACS, AFF, AHJ, DGP, EMT, FACP, GC, IDF, IDS, MAC, MDF, PoE, RCP, REX, STP, TIA, TCP/IP, TSP, UPS,

I have a sudden urge to include CPP, CFPS, CFE, FACFEI, CHS-IV, SET, CCI, MBAT

(link for those who don't get the reference)

On a more serious note, there has to be a line drawn somewhere. I mean, I could pull out my A+/Network+/Security+ notebooks and give you a couple hundred more acronyms. Just fiber alone gives you a bunch: SC, ST, LC, TOSLINK, SONET, STM, GBIC, MMF, SMF, 10GBase-LR/ER/SR, OM1/2/3/4, FDDI, and those are just ones I learned in a class that wasn't focused on fiber.

Appears not to contain Varifocal lens

Hello Peter, and good catch! We've added a section for both Varifocal and Fixed lenses in the glossary, but I've included both entries here as well. Thank you, and please inform us of any additional topics you feel we should add!

  • Varifocal Lens - Varifocal lenses allow adjustment of the focal length, either adjusted manually using two rotating rings or with a motorized mechanism. Varifocal lenses are specified using their focal length range, such as 2.8-10mm or 25-50mm. Varifocal models are flexible, as they can be adjusted to fit the field of view as needed over fixed lenses. For more information regarding lenses and focal lengths, please see IPVM's Lens Focal Length Tutorial.
  • Fixed Lens - Fixed lenses are locked into one focal length, e.g., 2.8mm, 4mm, 12mm, etc. Their main advantages are simplicity (since no manual adjustment is required) and size, though they are less flexible than varifocal lenses and cannot be fine tuned to fit specific desired fields of view. For more information regarding lenses and focal lengths, please see IPVM's Lens Focal Length Tutorial.

Can the Glossary be added to the menu that appears at top of page. ? Maybe under Tools? Just wondering how people are expected to find it . ie is it expected it will be found via the Search box on top RHS ? If so I feel it would be good if it was on a menu ....

Can a explanation of the term "Zoom Ratio" be added to the glossary?

Good call Peter! Below is the term for Zoom Ratio, and a link to our PTZ guide:

Zoom Ratio - Zoom ratio is formed simply by dividing the camera's maximum focal length by its minimum. For example, a ptz with a focal length of 4.3mm - 129mm would mean a zoom ratio of 30X (129 ÷ 4.3 = 30). However, since lenses have differing wide/telephoto focal lengths, two cameras with the same ratio may have very different fields of view. For more information regarding PTZ's, see IPVM's PTZ Camera Guide.

Glossary does not have SaaS

Software as a Service. You do mention this in some of your reports.

I know this is pretty commonplace but you used the Acronym API in the ONVIF explanation but don't list it in the Glosarry.

#5, thanks for your first comment! APIs added above and copied below:

API - Application Programming Interface is a means whereby systems (e.g., IP cameras or recorders) allow 3rd party systems to integrate. Within video surveillance, most APIs are not public and often require NDAs to access, which is different than many modern cloud or web systems. When systems upgrade, often the API is broken causing problems for 3rd parties integrating, see our API / SDK Tutorial.

Great glossary, thank you!

Here are some entries that could be included: GDPR, LPR, PSIM, ASIS.

#6, thanks for your first comment. I've added those in along with ANPR since, in some parts of the world, ANPR is used instead of LPR.

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Startup Spectral Edge RGB+IR Claims "Unique Low Light Performance Tech" on Apr 03, 2019
This UK startup, born out of university research, is boldly proclaiming that they deliver "Unique low light performance tech for video surveillance...
AI Video Tester Released on Apr 02, 2019
IPVM has released the world's first AI video tester that lets you see how various AI models (including from Amazon, Google, Microsoft and YOLO)...

Most Recent Industry Reports

Wyze Raises $10 Million And Seeks Services Expansion on May 27, 2020
Wyze has raised $10 million, the company's first disclosed raise since the $20 million announced at the beginning of 2019. Inside this note,...
Startup Videoloft Presents Cloud Storage on May 27, 2020
Videoloft presented offsite cloud storage at the May 2020 IPVM Startups show. A 30-minute video from Videoloft including IPVM...
Directory of 250+ Fever Camera News Reports Globally on May 27, 2020
This global directory tracks 250+ articles about thermal cameras used to detect fevers in response to the coronavirus pandemic. Articles are...
Integrators Rising Against Coronavirus on May 27, 2020
IPVM integrator statistics make it clear - Coronavirus's impact on business is lessening and many are anticipating even better news in weeks...
Netposa Stock Surges 46% After US Human Rights Abuse Sanctions on May 27, 2020
Last Friday, the US government announced it would sanction PRC video management provider NetPosa for being "complicit in human rights violations...
LILIN Presents NDAA-Compliant P2 Cameras on May 26, 2020
Merit LILIN presented its NDAA-compliant P2 camera series at the April 2020 IPVM New Products show. Inside this report: A 30-minute video...
ZKTeco Body Temperature and Mask Detection Reader Tested on May 26, 2020
While dedicated fever cameras emerged first, now tablet/kiosk fever detectors are ramping up. China's ZKTeco has been aggressively promoting such...
IDIS Presents 12MP IR Panoramic Fisheye on May 26, 2020
IDIS presented its 12MP IR panoramic fisheye camera at the April 2020 IPVM New Products show. Inside this report: A 30-minute video from...
FDA Defines Correct Operation of "Fever Cameras" on May 26, 2020
The US FDA has now defined the correct operation of "Thermal Imaging Systems", colloquially known as "fever cameras". Many in video...
OnSSI Founders Return, Start Corsight on May 25, 2020
The OnSSI founders are back, less than 2 years after selling OnSSI to Qognify, they have returned to Corsight, a spin-out of an Israeli AI...