HD-CVI Versus HD-SDI and IP Cameras
HDCVI VS. HD-SDI
Longer Transmission Distance.
Both HD-SDI and HDCVI can transfer HD video @720p/1080p, but HDCVI currently has the distinct advantage of transmission distance. HD-SDI in general transmission of media reaches 100 meters at most, while HDCVI can transmit 500 meters by using 75-3 cable and offers low signal distortion rate.
Figure 1 Transmission Distance Differences
HD-CVI offers better Anti-Interference Capability
Anti-interference capability found in HD-SDI solutions is relatively poor when installed in high-frequent radiation environments. This could lead to higher bit error ratios. HDCVI however, adopts low-frequency modulation technology, which eliminates high-frequency wireless electric radiation that ensures stable video transmission at a high image quality.
Figure 2 Anti-Interference Capability
HDCVI VS. IP
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.
Network HD uses video buffer technology and the delay is generally controlled within 300 milliseconds within a common and fair networking environment; However, HDCVI has no latency capability which offers an outstanding real-time performance.
HDCVI does not compress video at the camera to maintain its original effect and therefore presents vivid image quality.
Lower overall Cost
Unlike HD-SDI, which requires higher demands from cabling and installation; HDCVI solution can use the same coax cabling in place and often used by conventional analog solutions, which offers a great convenience and also helps to decrease cost.
HDCVI is able to transmit multiple-signals (video/audio and dual-way data) over one coax cable, it allows for video/audio synchronized transmission as well as reverse-signal transmission control; which further simplifies the installation.