Videovigilancia IP: Captura(este documento está en inglés)
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Switching from Analog to Digital Camera Up to 16-32 channels Analog Cameras Monitor Coax Cable DVR digitization Network Cameras Ethernet Cable (PoE) PC (Management Switch Software) / (PoE) NVRFacilities and Signal Transmission All Digitalized Thru TCP/IP
Network Camera Breakup Structure Video Codec (SoC) (Front) (Back) CF card slot IP Board detail
Network Camera Breakup Structure" Peripheral (Lens, enclosure, illuminator, scanner, bracket etc...) Camera with C/CS Camera with Camera with illuminator mount Lens Bracket Camera with Scanner Camera with enclosure
NTSC and PAL IP Surveillance Essential • ResolutionRecorded video is composed of scan lines. These lines can be displayed in two ways: • Interlaced scan • Progressive scanThere are two analog video standard resolutions: • NTSC (National Television System Committee) D1 720 x 576 4CIF 704 x 576 • PAL (Phase Alternating Line) 4CIF 704 x 480 D1 720 x 480 2CIF 704 x 288 2CIF 704 x 240 CIF 352 x 288 CIF 352 x 240 QCIF 176 x 144 QCIF 176 x 120 NTSC Image Resolutions PAL Image Resolutions
Sensor type and functionCCD (Charge-Coupled Device) sensor has better light CMOS (Complementary Metal Oxide Semiconductor) sensitivity and produces less noise image than CMOS sensors offers more integration and functionality on the sensors. chipCCD complex process consumes a lot more power, as much Lower power dissipation as 100 times more power than CMOS sensor. CMOS is cheaper Light sensitivity of CMOS sensors is almost equal to CCD sensors now Interlaced CMOS Interlaced CCD Progressive CMOS Progressive CCD
CCD Technology IP Surveillance Essential • Image SensorsCCD (Charge-Coupled Device) sensor is a mature sensor technology that has been used in cameras.Special process is used in CCDs manufacturing to create the ability of CCD to transmit charge across the chip without distortion thus CCD has better light sensitivity and produces less noise image than CMOS sensors.CCD complex process consumes a lot more power, as much as 100 times more power than CMOS sensor.
CMOS Technology IP Surveillance Essential • Image SensorsCompared to CCD sensors, CMOS (Complementary Metal Oxide Semiconductor)sensors offers more integration and functionality on the chip, with lower power dissipationat chip level, and faster readout, which are important advantages for producing highquality image.CMOS is cheaper as compared to CCD sensor because the chip can be fabricated onalmost any standard silicon production line.Light sensitivity of CMOS sensors is lower than CCD sensors because each pixel on aCMOS sensor has several transistors located next to it, thus many of the photos hit thetransistors instead of the photodiode.
Megapixel Resolution IP Surveillance Essential • ResolutionPixel is a tiny square of color, the smallest component of a digital image. One megapixelconsists of a million of individual pixel.A camera with megapixel resolution has a megapixel sensor that can produce an imageusing a million or more pixels in it.The more pixels a sensor has, the more details and higher quality the image can beproduced.Details of image produced by the camera is one of the most important aspects insurveillance system. Display format No. of megapixels Pixels SXGA 1.3 megapixels 1280 x 1024 UXGA 1.9 megapixel 1600 x 1200
Megapixel SensorResolution means details of an image. For video surveillance applications, to easily identify a criminal usually requires a high resolution image.The maximum resolution of analog camera is: • NTSC D1(704x480 = 337,920) similar 0.3 Megapixel • PAL D1(704x576= 405,504) equals 0.4 MegapixelUsually, only CIF resolution is used for recording: • NTSC CIF(352x240 = 84,480) similar 0.08 Megapixel • PAL CIF(352x288= 101,376) equals 0.1 MegapixelCurrently only IP cameras that use digital compression and transmission can achieve megapixel resolution. Higher resolutions are expected in the future.A common megapixel format is • CMOS 1.3M(1280x1024=1,310,720) equals 1.3 Megapixel • CCD 1.3M(1280x960=1,228,800) similar 1.2 MegapixelIt’s 4 times higher than analog cameras!
Megapixel Sensor1.3 megapixel Camera provides up to 4 times higher resolution than common VGA/D1cameraMegapixel resolution provides details and clarity not seen on traditional analog and VGAcameras, especially at the border of the object. Megapixel VGA
Megapixel Sensor1.3 megapixel Camera provides up to 4 times higher resolution than common VGA/D1cameraMegapixel resolution provides details and clarity not seen on traditional analog and VGAcameras, especially at the border of the object. CIF D1 / VGA Mega pixel
16x Digital Zoom1x ~ 16x digital zoom adjustable at VGA resolution 16x zoom size of 2mm actual size of 36mm1x video @ VGA resolution The left image is a 16x zoom image for 2mm length. The right image is around 18 pcs of 2mm actual length. Therefore, DCS-2121/2102 supports 16x digital zoom 16x digital zoom
Light Sensitivity IP Surveillance Essential • Light SensitivityLight sensitivity of a surveillance camera is the luminance level, measured in lux, at whichthe camera produces a satisfactory image.The lower the lux rating, the more sensitive is the camera to the light. A camera withlower lux rating will perform better in low-light condition.Generally, the camera needs at least 200 lux to produce a good quality image. With morelight on the object, the camera will produce the better image. Illuminance Light environment 32000 – 130000 lux Direct sunlight 10000 – 25000 lux Daylight – non direct sun 320 – 500 lux Recommended office lighting 80 lux Hallway / toilet 0.27 lux Full moon on a clear night
Lens type and functionFixed lens Varifocal lens Fixed focal length Variety of focal length( need to manually refocus the lens every time they change the Fixed iris field of view of the camera) Fixed zoom Manual/auto Iris Manual/auto zoom Board mount Lens Board mount Lens C/CS mount Lens C/CS mount Lens
Field of View IP Surveillance Essential • Lens ElementsThere are three types of surveillance camera’s field of view: • Normal View Normal view offers the same field of view with human eye. • Telephoto Telephoto offers narrower field of view as compared to human eye, but better details of image. This type of view is usually used for small or far surveillance object. • Wide Angle Wide angle offers wider field of view as compared to human eye, but lesser details of image. This type is usually used for viewing larger areas of surveillance. Wide Angle Normal View Telephoto
Field of View IP Surveillance Essential • Lens ElementsThere are three types of lens categorized based on how their field of view is adjusted: • Fixed lens This type of lens provides fixed focal length and only supports one field of view, either of telephoto, normal or wide angle, and is usually designed for optimal resolution. A fixed IP camera usually has 4 mm focal length. • Verifocal lens This type of lens provides a variety of vocal length and supports different fields of view. A verifocal IP camera offers a range of 3 mm to 8 mm focal length. One limitation of such lens is that users need to manually refocus the lens every time they change the field of view of the camera. • Zoom lens Similar to verifocal lens, Zoom lens gives users the flexibility of adjusting the focal length and field of view. With zoom lens, users do not need to refocus the lens when they adjust the focal length. A lens zoom capability is the ratio between the lens’ shortest and longest focal length, for example in the case of an 8x-zoom, the shortest focal length will be 6 mm and the longest 48 mm.
Focal LengthThe focal length of an optical system is a measure of how strongly the system converges(focuses) or diverges (defocuses) light.In photography, longer focal length or lower optical power is associated with larger magnificationof distant objects. 9mm (0.4lux outdoor) 22mm (0.4lux outdoor)
Matching Lens and SensorWhen an IP camera offers an exchangeable lens feature, selecting a suitable lens for thecamera is one of the most important factor in order to fully utilize the camera’s capability.If a smaller lens is used instead of the one that actually fits the image sensor of thecamera, the resulting image will have black corners (Left Image below). If a larger lens isused instead of the one that actually fits the image sensor of the camera, it will not fullyutilize the lens’ field of view (Right Image below), and will have a smaller field of field thanthe lens’ capability. 1/2” Sensor 1/2” Sensor 1/2” Sensor Black Corner 1/3” Lens 1/2” Lens 2/3” Lens
F-Number & Exposure IP Surveillance Essential • Lens ElementsF-Number, also known as focal ratio, define light-gathering ability of a lens – the amountof light allowed to pass through the lens.F-Number, f/#, is the ratio of lens’ focus length to diameter of the lens aperture. f/# = N = f/D f is focal length, and D is diameter of lens’ aperture. Common F-number on a lensare f/1, f/2, f/4, f/8, etc.The lower the f-number, the more light can pass through the lens. This kind of lensperform better and produce higher quality image in low-light situation compared to lenswith higher f-number. F-number f1.0 f1.2 f1.4 f1.7 f2.8 f4.0 f5.6 % of light passed 20% 14.14% 10% 7.07% 2.5% 1.25% 0.625%
Manual or Automatic Iris IP Surveillance Essential • Lens ElementsIn camera, a diaphragm is an opaque structure with an aperture in its center to limit the amount of light that passes through the lens. Most of modern cameras use adjustable diaphragm called an iris diaphragm or often referred as an iris.Manual Iris • Lens with manual iris usually provides either a ring for users to manually adjust the iris, or the iris is fixed at a specific f-number. • Manual iris lens is most suitable for environments with constant light level such as indoor environments.Automatic Iris • Lens with automatic iris, the aperture of the iris is automatically adjusted and controlled by the camera processor to maintain optimum light level to the image sensor. Generally, camera processor controls the automatic iris via direct current (DC) thus automatic iris is also known as DC-iris. • Automatic iris lens is most suitable for outdoor environment where the light level is constantly changing.
Day & Night SolutionInfrared LED is usually used for night surveillance, with camera set to allow Infrared (IR) light pass thru sensor to get night visionSolution 1: With dual-band filter, cameras can be used during day time with visible light as well as for night time with IR light (extra IR LED illuminator required). This is the most entry level solution that can work in the day and at night, but sometimes its side effect may affect picture color for day time.Solution 2: With ICR (Infrared-Cut Removable filter) module, it can use 2 filters for day and night time to provide better color performance, but at a higher cost.Solution 3: Camera with built-in IR LED for illumination and dual-band or ICR filter to provide advanced functionality, usually known as an all-in-one camera.
Day & Night Solution - LightLight perception • Light is a form of radiation wave energy that exists in a spectrum. The human eye can see, however, only a portion (between wavelengths of ~400 – 700 nanometers or nm). • The following illustration shows the wavelength where human eyes will not be able to see: outside the range to the left of the BLUE color below 400nm is the ultraviolet light, and outside the range to the right of the RED color above 700nm is the infrared light.
Day & Night Solution – IR-Cut FilterIR cut coating in all camera • Normal camera with coating filter allows only visible light to pass through • Can’t see anything in night mode
Day & Night Solution - ICRICR (IR-Cut Removable) Lens • Remove IR-cut filter during night time will give best results • True day and night • But more expensive Without ICR With ICR ICR Lens Module
Day & Night Solution – Dual BandDual band coating to allow visible light and IR illumination to pass through.Problem of dual band coating • Sensors respond to both visible light and infrared light • White balance algorithm will be affected by the infrared • Image have color problem in strong IR light environment Filter glass.
Day & Night Solution – IR CameraStructure of IR Camera • With condenser, the distance of IR can reach up to two times further than without. IR LED Optical Condenser
Day & Night SolutionDevices with con Dual-‐band ﬁlter: DCS-‐6110 DCS-‐7510 DCS-‐3420 DCS-‐7410 Devices with ICR (Infrared-‐Cut Removable ﬁlter): DCS-‐3110 DCS-‐3415 DCS-‐3430 DCS-‐3710 DCS-‐6505/6535 Devices with built-‐in IR LED & dual-‐band Filter or ICR Filter: DCS-‐5230 DCS-‐6111 DCS-‐7410 DCS-‐6511 DCS-‐7110
Image/Video Control – 3A SupportAutomatic Electronic Shutter (AES) – Feature that automatically adjust exposure timeaccording to the environment light and catch fast moving object to ensure image clarity.Automatic Gain Control (AGC) – Electronic circuit that amplifies the video signal when thestrength of the signal falls below a given value.Automatic White Balance (AWB) – Technology that balances the image colors against alight color object in the cameras view. Correct White Balance Incorrect White Balance
Wide Dynamic Range (WDR)WDR is a new sensor technology for handling extreme variations of bright and darkconditions within the same scene, allowing it to function like the human eye which quicklyadjusts to changing lighting conditions.
Wide Dynamic Range (WDR)Wide Dynamic Range Technology uses two shutter speeds, high and normal, inalternative video fields and combines these two fields into one frame. This will allowdetails to be captured accurately even if one area is bright and another is dark bycombining the fields to one frame, thus yielding higher quality images. Original Image BLC WDR
WDR ApplicationWDR sensor is capable of capturing both the dark and bright areas of a scene tocombine the differences and generate a highly realistic image as the real scene.As it preserves as much information within the video as possible, the WDR camera isable to provide video quality close to the capabilities of the human eye.It is largely applied in highly contrast environments such as lobby entrances, parking lots,ATM, loading areas and much more. Normal Camera WDR Camera
Video Compression IP Surveillance Essential • CompressionUncompressed or raw video data consumes very large amount of data storage and requires high bandwidth to transmit.Video compression is a technique to reduce or remove some quantity of video data with acceptable quality so that the digital video can be stored or sent in an efficient size.There are many compression technologies available in the market which may be proprietary or following industry standard. Most network vendors use standard compression technique to ensure compatibility and interoperability.
Video Codec IP Surveillance Essential • CompressionVideo Codec (encoder/decoder) is a pair of algorithms used for compressing and/or decompressing digital video.Different algorithms can be implemented in the same hardware or software which will allow multiple formats to coexist. Different algorithms however may not be compatible with each other, and video compressed with one algorithm usually cannot be decompressed using a different algorithm.Some of the commonly used video codec include: • MPEG-1 : used for Video CDs • MPEG-2 : used for DVD, SVCD and most digital video broadcasting and cable distribution system • MPEG-4 : used for Internet, broadcast and storage media • WMV: Microsoft’s family of video codec designs
Motion JPEG IP Surveillance Essential • CompressionMotion JPEG is a digital video sequence format that consist of a series ofindividual JPEG image. A series of image frames is considered as a motion videoif 16 image frames or more are shown in one second. 30 (NTSC) or 25 (PAL)frames per second will be recognized as full motion video.Each image frame in the video sequence should have the same quality dependingon the compression level. The higher the compression level, the lower the imagequality and file size. Frame 1 Frame 2 Frame 3
MPEG-4 IP Surveillance Essential • CompressionMPEG-4 is one of the licensed standard developed by MPEG (Moving Picture ExpertsGroup), a committee formed by ISO to set standard for audio and video compression.One of the main advantage of MPEG-4 is that MPEG-4 offers high quality image withminimum file size thus MPEG-4 is suitable for low bandwidth application that requireshigh quality images.MPEG-4 uses an algorithm that compares a frame with its reference frame and onlypixels that are different from the reference frame are coded. Transmitted Not Transmitted
H.264 IP Surveillance Essential • CompressionH.264, also known as MPEG-4 part 10/AVC, is the latest MPEG video compression standard. Without affecting image quality, H.264 can reduce the size of a digital video file by more than 80% as compared with motion JPEG format, and by more than 50% as compared with MPEG-4 standard.H.264 delivers excellent video quality across an entire bandwidth spectrum from 3G to HD and everything in between (from 40 Kbps to upwards of 10 Mbps).The improved compression performance of H.264 comes at the price of greater computational cost. H.264 is more sophisticated than earlier compression methods.The highly efficient compression technology of H.264 is expected to support the adaptation of higher performance network cameras such as megapixel camera. MPEG-2 MPEG-4 H.264
Compression Format Comparison Video Compression Type MJPEG MPEG-4 H.264Low bit rate streams No Yes YesStream size @ 30fps D1 1800KBps 60KBps 60KBpsStream size @ 2fps D1 60KBps 50KBps 50KBpsCompression quality Standard Good ExcellentComputational Low Medium HighrequirementApplications Security DVD, Digital TV, Security surveillance, surveillance Satellite TV, Personal video phone, video video recorders, mobile conferencing, digital streaming, internet TV, satellite TV, mobile streaming, camcorders streaming
Frame Rate IP Surveillance Essential • CompressionFrame rate is the measurement of number of frames or images that an imaging device produces in one second.Video with higher frame rate has a higher quality image and smoother object movement, but has a larger file size.NTSC frame rate is 60 interlaced field per second or approximately 29.87 frame per second. (2 fields will combine into 1 frame)PAL frame rate is 50 interlaced field per second or 25 frame per second. (2 fields will combine into 1 frame).
Audio Support IP Surveillance Essential • AudioIn traditional analog surveillance system, implementation of audio supportneeds two separate cables for audio and video data.IP surveillance supports audio implementation in the system. IP camera withaudio support can process and send both audio and video data over the sameIP network infrastructure for monitoring, recording or any other audio/videoprocessing. Analog Surveillance System Video Stream Monitor Analog Camera Audio Stream DVR IP Surveillance System IP Network Video Stream Audio Stream IP Camera Management Server
Audio Compression – Audio CodecAdvanced Audio Coding (AAC) • Advanced Audio Coding (AAC) is a standardized encoding mechanism for digital audio that uses lossy compression. AAC generally offers better sound quality than MP3 at many bit rates. AAC encoding compresses more efficiently and thus produces higher quality audio with smaller file sizes.Adaptive Multi-Rate (AMR) • Adaptive Multi-Rate (AMR) is an audio data compression scheme optimized for speech coding. AMR is now widely used in GSM and UMTS. It uses link adaptation to select from one of eight different bit rates based on link conditions.Adaptive Differential Pulse-Code Modulation (ADPCM) • ADPCM (adaptive differential pulse-code modulation) is a technique for converting sound or analog information to digital information by taking frequent samples of the sound and converting the value of the sampled sound modulation in binary terms. ADPCM is used to send sound on fiber-optic long- distance lines to store sound together with text, images, and codes to CD-ROM or other media.
Streaming Technologies IP Networking Essential • Local Area NetworkWhat is Streaming? • Streaming provides the ability to grab multimedia data (i.e. audio, video, and other types of multimedia) from a source or a streaming provider to deliver to the end user, which in the following illustration, is the users computer.Different technologies for data streaming: • RTP (Real-time Transfer Protocol) • RTCP (Real Time Control Protocol) • RTSP (Real Time Streaming Protocol) Client in the network streams multimedia data from the multimedia server Internal Client Multimedia server Switch Gigabit uplink to internal multimedia server Client
Dual Stream / Multi-ProfileAll the new cameras are featured with MPEG4 and MJPEG dual stream. It can stream 2 different stream with independent compression, resolution and frame rate. This will benefit end user to view the video from different site or device • e.g. one from PC, one from mobile phoneMulti-profile means the IP camera can stream more than 2 streams. Some of the new models support this feature. • e.g. Using CIF and MPEG4 for Web Viewing, QCIF and MPEG4 for 3G Mobile Viewing, and D1 and MJPEG for Recording
3GPP Video StreamingUsing this feature it is possible to remotely visualize IP camera live video on your 3G Phone. (eg. rstp://ipcameras.dlinkddns.com:559)
Bandwidth NeedsIP Surveillance system with less than 10 IP cameras can be implemented in 100 Mbps network without having to consider bandwidth limitation.Implementing more than 10 IP cameras using gigabit backbone connection will provide better performance and prevent the IP surveillance system from overwhelming the network. This is because high quality image with high frame rate used by the IP Camera can use up to more than 2 to 3 Mbps of network bandwidth.
Calculating Storage NeedsH.264 and MPEG-4 calculation • Mega bit per hour = approx. bit rate x 3600s Compression Resolution Approx. bit rate Mega bit per Mega Byte per Type (Kbps) hour hour H.264 CIF 110 396 49.5 4CIF 600 2160 270 MPEG-4 CIF 170 612 76.5 4CIF 880 3168 396M-JPEG calculation • Mega bit per hour = image size x frame per second x 3600s Resolution Image size (Kb) Frames per Mega bit per Mega Byte per second hour hour CIF 104 15 5616 702 4CIF 320 15 17280 2160
Digital Input/Digital Output (DI/DO)The following is a list of external devices that can be connected to the I/O connector of the D-Link IP Camera. • DI interface: • Siren/Alarm relays • PIR Motion Sensor • Temperature sensor • Simple on/off switch • DO interface: • External light (Illuminator, etc) • Any relayed control device
RS-485RS-485 is a serial data communication protocol that allows multiple PTZ cameras on the same twisted pair cable to connect via serial connection for control from one camera to the nextRS-485 offers high data transmission speeds (Up to 35Mbps on 10 meters distance and up to 100Kbps on 1200 meters distance) and is able to cover relatively long distances (approximately 1200 meters)When included with an IP camera, the RS-485 interface can be used for connecting the IP Camera to an external PTZ scanner
Power over Ethernet (PoE)Power over Ethernet, with its standard protocol defined by IEEE 802.3af specification,delivers electrical power (DC voltage) over the same network cable of a device forsending data traffic.Certain models of D-link IP Cameras support Power over Ethernet (PoE) to provide moreflexibility and easier implementation of the IP camera without the need to worry aboutfinding a connection to nearest power supply.PoE is especially useful for scenarios where power supply is not available or is difficult toreach at the location where the IP Camera is to be installed. With PoE support on the IP Camera, connection to power outlet is no longer needed. All that is needed is for the IP camera to be connected to a Switch with PoE built-in. PoE Switch Current electric Data traffic PoE IP Camera
What we can do if the device is not PoE?Switch PoE 802.3af (DES-‐1228P) Power 12V SpliWer Data+ Power 48V IP Camera DCS-‐5220 Datos Power 12V Data Power 48V + Data
Event Triggered RecordingWith event-based recording feature enabled, D-Link IP camera will automatically start recording every time specific event set by administrator occursFour types of event can trigger D-Link IP Camera to run an action as specified by the administrator such as to start recording. The events are: • Motion detection • Digital input of external devices (e.g. PIR motion sensor, alarm relays) • Periodic schedule • Specifies the duration for action trigger to send out email of captured image for scheduled event • System boot • System will trigger camera to run the specified action at boot-up
Motion DetectionMotion detection feature, if enabled, will trigger the IP camera to send the snapshot/videoclip to remote server (Email, FTP) or to record the event to local storage.How does motion detection in D-Link IP Camera works? • D-Link IP Cameras that support motion detection feature allow three different areas to be monitored for motion detection. • Sensitivity and Percentage parameters must be defined in order for the motion detection of the IP camera to work.Figure B – How motion detection work Figure A – Percentage Indicator
Front End StorageFront end storage can store video at the camera for backup. It can stop storing after the disk is full or continuously overwrite to keep the latest data.Currently it supports CF card, SD card or Micro SD card.
IP66 and IP44 (Environmental Certification)The European Committee for Electro technical Standardization developed the Ingress Protection (IP) ratings (CENELEC) (described in IEC/EN 60529), which specifies the degrees of protection against the intrusion of solid objects to a piece of electrical equipment or enclosures.The way in which the index and classification works is as follows: The IP will be made up of two numbers • The first states the level of mechanical protection from thing such as dust and other solid objects. • The second number indicates the degree of protection from water and other liquids.Examples of this certification are IP code 66 (total protection against dust, and also against heavy water spray) and IP code 44 (protection against solid object over 1 mm and also against sprayed water from all direction).
Rule of IP Code – IP66 and IP44IP first number IP second numberProtection against solid object Protection against liquid 0 No protection. 0 No Protection 1 Protection against vertically falling drops of water e.g. 1 Protected against solid objects up to 50mm, e.g. condensation. accidental touch by hands. 2 Protection against direct sprays of water up to 15° from the vertical. 2 Protected against solid objects up to 12mm, e.g. fingers. 3 Protected against direct sprays of water up to 60° from the vertical. 3 Protected against solid objects over 2.5mm (tools and wires). 4 Protection against water sprayed from all directions. limited ingress permitted. 4 Protected against solid objects over 1mm (tools, 5 Protected against low pressure jets of water from all wire, and small wires). directions. limited ingress. 5 Protected against dust limited ingress (no 6 Protected against low pressure jets of water, e.g. for use harmful deposit). on ship decks - limited ingress permitted. 6 Totally protected against dust. 7 Protected against the effect of immersion between 15cm and 1m. 8 Protects against long periods of immersion under pressure.
Wired-in BracketWire-in bracket is designed to secure the camera’s wire and prevent itfrom damage
Vari-focal adjustment with outdoor housingThe focus and zoom control are located at the external of the enclosure for ease of adjustment.
Video Server (Encoder)A video server (also referred to as video encoder) digitizes analog video signals and sendsdigital images directly over an IP network, such as a LAN, intranet or InternetIt turns an analog video system into a network video system and enables users to view liveimages using a Web browser or a video management software on any local or remotecomputer on a networkIt allows authorized viewers from different locations to simultaneously access images fromthe same analog camera as well as network cameras if they are added to the systemThe Video Server is suitable as a solution for targeting the market which has existinganalog CCTV cameras and looking into converting its CCTV into an IP-compatiblesurveillance system to provide users with remote access for video imaging through theLAN, Intranet or Internet. CCTV (Analog Video Internet Remote User Camera) Server IP Camera