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Confused by all the new definitions for CCTV? You are not alone, we hope the details below will help and if you still need more information just call us.

 

Comparing Analogue CCTV to HD over Coax : HD-CVI, HD-TVI, HD-SDI or AHD and IP or Network camera systems

 

Confused by all the new definitions for CCTV?

You are not alone, we hope the details below will help and if you still need more information just call us.

Comparing Analogue CCTV to HD over Coax : HD-CVI, HD-TVI, HD-SDI or AHD and IP or Network camera systems

Its all about Definition or picture quality if you prefer!

The original Analogue CCTV has been the defacto CCTV standard for many years, typically it has a resolution of 720 x 576 pixels, called D1, the cameras are stated as having 600-700 TVL ( TV Lines of resolution)

The new HD standards described below can operate at 720p (1280 x 720) and 1080p (1920x 1080) resolutions, significantly better than D1.

IP CCTV can operate at up to 5MP (2592 x 1944) and 4K definition CCTV systems are now available
Note: 4K – sometimes termed 'UHD or Ultra High Definition' – offers four times the resolution of HDTV 1080p with a video resolution of 3840 x 2160 pixels.
 
HD-CVI (High Definition Composite Video Interface) was launched by DAHUA in 2012 as an 
alternative to HD-SDI
 
HD-CVI is an analog format  (HD-SDI is digital) and it can transmit up to distances up to 500m,
that is 400m more than HD-SDI.
 
Since HD-CVI was launched, two more analog HD formats have been introduced to the market.

HD-TVI (High Definition Transport Video Interface) by Techpoint(2012) located in the Silicon Valley.

AHD (Analogue High Definition) by Nextchip of Korea. 

All three formats are based on Progressive Scan HD analogue technology, however they are not compatible with each other, you cannot mix and match any of the HD cameras, they all must be the same technology as the Recorder.

HD-SDI (Serial Digital Interface) is a broadcast standard for digital video transmission over coaxial cable. It can only be used with Coax cable and is limited to a 100m transmision distance with out the use of repeaters. It is also quite expensive.
 
All four of the HD solutions allow for the upgrade of an existing coaxial analogue system
to the 2MP standard without changing the cabling. HD-SDI is the only system that cannot use Cat5/6 cable and baluns.
 
Compared with HD-SDI, all three HD analogue formats offer longer transmission distances 
without signal loss.
 
Compared with IP CCTV, all four HD formats are free from the latency or signal loss that IP systems can sometimes present, also equipment costs are lower.  

Compared with the four HD formats, IP CCTV systems can provide higher resolutions and by using POE recorders and cameras they may be very simple to deploy, no additional camera PSU is required or the extra cabling and labour time to install it all.

Any questions still, just call us!

Its all about Definition or picture quality if you prefer!

The original Analogue CCTV has been the defacto CCTV standard for many years, typically it has a resolution of 720 x 576 pixels, called D1, the cameras are stated as having 600-700 TVL ( TV Lines of resolution)

The new HD standards described below can operate at 720p (1280 x 720) and 1080p (1920x 1080) resolutions, significantly better than D1.

IP CCTV can operate at up to 5MP (2592 x 1944) and 4K definition CCTV systems are now available

Note: 4K – sometimes termed 'UHD or Ultra High Definition' – offers four times the resolution of HDTV 1080p with a video resolution of 3840 x 2160 pixels.

HD-CVI (High Definition Composite Video Interface) was launched by DAHUA in 2012 as an alternative to HD-SDI

HD-CVI is an analog format  (HD-SDI is digital) and it can transmit up to distances up to 500m, that is 400m more than HD-SDI.

Since HD-CVI was launched, two more analog HD formats have been introduced to the market.

HD-TVI (High Definition Transport Video Interface) by Techpoint(2012) located in the Silicon Valley.

AHD (Analogue High Definition) by Nextchip of Korea. 

All three formats are based on Progressive Scan HD analogue technology, however they are not compatible with each other, you cannot mix and match any of the HD cameras, they all must be the same technology as the Recorder.

HD-SDI (Serial Digital Interface) is a broadcast standard for digital video transmission over coaxial cable. It can only be used with Coax cable and is limited to a 100m transmission distance with out the use of repeaters. It is also quite expensive.

All four of the HD solutions allow for the upgrade of an existing coaxial analogue system to the 2MP standard without changing the cabling. HD-SDI is the only system that cannot use Cat5/6 cable and baluns. 

Compared with HD-SDI, all three HD analogue formats offer longer transmission distances without signal loss.

Compared with IP CCTV, all four HD formats are free from the latency or signal loss that IP systems can sometimes present, also equipment costs are lower.  

Compared with the four HD formats, IP CCTV systems can provide higher resolutions and by using POE recorders and cameras they may be very simple to deploy, no additional camera PSU is required or the extra cabling and labour time to install it all.

Any questions still, just call us!