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What is HD-CVI?

Posted by Lia Tappin
1st April 2015

HD-CVI stands for High Definition Composite Video Interface.

This is a brand new technology in the security camera industry that provides a different method of transmitting video signals over coaxial cables. Until this new technology surfaced, analogue CCTV video was limited to 960h video resolution. 960h resolution refers to the 30% increase in horizontal resolution, so the maximum analogue resolution up to this point was 960 x 480 pixels. This has been the accepted limit to analog video transmission for many years. In order to achieve greater transmission would mean switching to digital video using either HD-SDI (High Definition Serial Digital Interface) or Network IP video formats.

Enter HD-CVI, a true alternative to Network IP solutions. HD-CVI technology uses a licensed video transmitter and receiver that is able to transmit up to 1080p video resolution (1920 x 1080) in an uncompressed format over the same standard coaxial cable that is used for standard CCTV cameras. This uncompressed video format is able to transmit over longer distances than either HD-SDI or Network IP cameras and without the latency and bandwidth issues that are so common.

HD-CVI CCTVAdditionally, HD-CVI is able to transmit video, audio and control (OSD or PTZ) over a single coaxial cable instead of requiring separate cables for each transmission.

HDCVI Technology is a cost effective solution that allows for a more complex installation, based on existing RG-59 coaxial cable. In most cases HD-CVI is around the same price as the older analogue CCTV technology and is far less expensive than HD-SDI or IP Network transmission.

Analogue systems based on coaxial cabling still dominate today’s video surveillance market, however the demand for high definition is increasing. HDCVI technology is here to bridge the gap and give a high definition solution to those with an analogue system already in place. No new cabling is required when upgrading existing analogue systems to high definition when you are using HDCVI Technology.

Dahua HD-CVI CCTV

Why choose HDCVI?

  • Easy upgrade to HD 1080p & 720p
  • Progressive video
  • Long Distance Transmission: HDCVI=500m v.s. HDSDI=100m
  • Compatible with standard video baluns

 

Benefits of HD-CVI vs Analogue CCTV Cameras

  • CCTV cameras are limited to 960h resolution which is 960 x 480 pixels. HD-CVI cameras can transmit up to 1080p resolution (2 Megapixel) which is 1920 x 1080 pixels. HD-CVI is capable of up to 450% great resolution and detail than standard CCTV cameras and DVRs.
  • CCTV can only transmit video over the single coaxial cable. Audio and control must be run over separate cables. HD-CVI can transmit video, audio and control over a single cable saving money and time.
  • The price point of analog CCTV and HD-CVI is about the same. You get more resolution for the money with HD-CVI.

HDCVI transmission distance

Benefits of HD-CVI vs HD-SDI

  • Supports further video transmission distances. HD-SDI is limited to 333 feet for video transmission. HD-CVI can be transmitted up to 1500ft.
  • HD-SDI can only transmit video. HD-CVI can transmit video, audio and control requiring less cable infrastructure.
  • HD-SDI is vulnerable to interference.
  • HD-SDI can only transmit over high quality copper core coaxial cable. HD-CVI can transmit over any cable used for CCTV cameras. It will work with copper clad aluminum, Ethernet cable with video baluns and even prefabricated plug and play cables.
  • HD-CVI is less expensive than HD-SDI.
  • HD-SDI will most likely be obsolete in a few years.

 

Benefits of HD-CVI vs IP Networked Cameras

  • HDCVI uses P2P transmission to ensure a reliable and smooth transmission. IP network cameras use Ethernet for transmission and thus may lead to network jitter and packet loss.
  • IP cameras cannot transmit video over coaxial cable natively so the infrastructure must be built with ethernet cable or fiber. HD-CVI can transmit over Coaxial Cable or Ethernet cable using video baluns allowing for easy upgrades to existing systems saving money and time.
  • IP cameras cannot transmit video for distances over 333 feet without using relay devices on ethernet cable. HD-CVI can transmit video over 1500 feet without using relay devices over coax or ethernet cable.
  • IP cameras require bandwidth considerations and are subject to latency and collisions as well as IP conflicts. HD-CVI cameras do not have latency or collision issues which means that HD-CVI will not interfere with the operation of your network and is much simpler to install and configure.
  • HD-CVI technology is much less expensive than IP Network cameras and recorders.
  • HDCVI does not compress video at the camera to maintain its original effect and therefore presents vivid image quality.
Posted by Lia Tappin
1st April 2015