4 CH 1080P HD-SDI Surveillance DVR Card System CCTV HD-CCTV High Definition
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4 Channel HD-SDI Full-HD 1080P Display / Recording / Playback. The AHS-4HDI card is the world’s leading H.264 compression card, featured with full HD video (1080P resolution) support. With AHS Proprietary chipset. It is one of the first HD DVR card, adopting the latest video compression technologies and new generation encoding chipset. AHS+ software included with purchase of this card.
HD-SDI stands for High Definition Serial Digital Interface which a standard interface comply with SMPTE 292M standard. SMPTE 292M is a Society of Motion Picture and Television Engineers (SMPTE) regulated standard which allows bit rates of 1.485 Gbit/s. This bit rate is typical for transferring uncompressed high definition video. HD-SDI is also a part of serial digital interface standards based on a coaxial cable.
HD-SDI standards protocol has the capacity to transmit 720p or 1080p resolution video over at least 100 meter using standard RG59 coaxial cable. Hence, CCTV devices (e.g. cameras, DVR & PC DVR Cards) with HD-SDI are an ideal choice for users who are looking to upgrade their existing CCTV surveillance system to HD CCTV surveillance system without having to reinstall cables. This is a great alternative solution to IP CCTV.
Since, the high definition video is transported as uncompressed video over HD-SDI it is highly recommended to compress HD video using a hardware based h.264 compression DVR card. Such DVR cards will store and stream video over internet more efficiently without losing any video quality.