HDCVI staat voor High Definition Composite Video Interface
HDCVi is de analoge transmissie van niet gecomprimeerde (raw) digitale video en werd door Dahua ontwikkeld.
De techniek laat toe om videobeelden in hoge resolutie (4K) te versturen over een coax kabel (tot 500 meter).
Het laat toe om analoge camerasystemen, die gebruik maken van coaxkabels, om te bouwen naar digitale high definition CCTV systemen.
Varianten op HDCVI zijn AHD en TVI
HDCVI technology supports up to 4K ultra high definition resolution. With 4 times the pixels of 1080P, it presents a true-to-life image with impressive clarity that captures even the tiniest of details. As the very first technology to bring 4K-over-coax to the market, HDCVI comes with a complete product portfolio. The 4K box camera (DH-HAC-HF3805G) features Starlight capability and offers a full color image even in extreme low-light environments. The 4K IR bullet and dome cameras (DH-HAC-HFW3802E-Z & DH-HAC-HDBW3802E-Z) feature 120dB true WDR and long-distance IR range. The 4K multi-sensor camera(DH-HAC-PFW3601-A180) and fisheye camera (DH-HAC-EBW3802) capture a panoramic image which covers a wider monitoring area.
4 Signals over 1 Coaxial Cable
HDCVI technology can simultaneously transmit 4 signals (audio, video, data, and power) over 1 coaxial cable. HDCVI cameras offer high resolution video, support audio input or built-in mic, and communicate with the HCVR through control signals. Moreover, Power-over-Coax (PoC) technology has been made available for integrated power-supply requirements. HDCVI cameras are able to cover multiple signal acquisitiondemands, further simplifying the installation and deployment of surveillance systems.
Long Distance Transmission
HDCVI technology guarantees long-distance transmission in real-time without any signal loss. Based on real-world scenario testing in Dahua's test laboratory, it supports the following distances at the corresponding resolutions.
Seamless Upgrade
Whether in constructing a new system or upgrading an existing obsolete system, the deployment of an HDCVI solution requires only minimal basic labor and costs. Users are able to enjoy the advantages of modern technological innovation with their existing analog infrastructure. Even if the current system is using other HD-over-coax technologies, HDCVI is perfectly compatible and can be easily integrated, owing to its full compatibility with HDCVI/AHD/TVI/CVBS/IP. HDCVI devices are always plug and play, making construction flexible, and enabling no-hassle network configuration. In addition, HDCVI systems allow the reuse of existing cables as it is compatible with both coaxial cable and UTP.
Overview
The Dahua HDCVI technology has been leading the HD-over-Coax industry’s development since its first launch in 2012. With its mission of “Enabling a safer society and smarter living”, Dahua has been continuously active in providing more opportunities to customers as well as improving its services with innovations and technological advancements. In 2019, Dahua unveils a brand new HDCVI 6.0 technology with core values including 4K Real-time, Enhanced AI, AI Coding and Two-way talk, achieving “clarity, abundance, and understanding” in monitoring.
Core Technologies
4K Real-time
Dahua self-developed chipset realizes industry-leading 4K real-time over-coax transmission. 4K@25/30fps camera video output better restores the monitoring scene with superior clarity and fluent visual experience. Double frame rates (30fps =2x15fps) bring doubled information.
As the very first technology to bring 4K Real-time to the HD-over-Coax market, HDCVI comes with a complete product portfolio. 4K real-time camera offers various bullet/eyeball cases and optional models with built-in mic. 4K/4K-N real-time XVRs support AI functions for accurate alarm. In addition, the 4K real-time camera supports self-adaptive video output frame rate to adapt both new and previous 4K XVRs, protecting users’ investment.
SMD Smart Motion Detection
Enhanced AI
Adopting independent AI chip and advanced deep-learning algorithm, HDCVI 6.0 enables precise recognition of human and vehicle for accurate alarm and quick target search, making it easy for users to focus on real threats, enhancing video analysis efficiency, and thus significantly reducing labor costs. HDCVI 6.0 Enhanced AI guarantees alarm accuracy, with false alarm rate below 2%. HDCVI 6.0 also supports AI functions including SMD Plus, Perimeter Protection, Face Recognition and Metadata Search.
SMD Plus
SMD Plus, also referred to as Smart Motion Detection Plus, can recognize human and vehicle shapes based on motion detection in order to reduce false alarms. Quick search with options for human and vehicle trigger types further improves searching efficiency. The Dahua SMD Plus empowers all channels on XVR with AI functions. Users can enable this feature with just a simple click. No extra configuration is required.
*For more information about HDCVI 6.0-Enhanced AI, Please refer to WizSense & WizMind.
AI Coding
As video moves toward high definition, video encoding formats have also developed from MJPEG, H.264, and H.265, which can save more storage space but in expense of image quality loss. The HDCVI 6.0 AI coding puts emphasis on human and vehicle while encoding, which guarantees the image quality of the target. It can also further compress the bit rate when no real target has been detected to save storage cost. With the same image quality, AI coding based on CBR only needs 50% of bandwidth and storage costs compared with H.265.
Two-way Talk
HDCVI Two-way Talk is a unique and leading technology in HD-over-Coax industry. It realizes intercommunication between the monitoring center and the monitored site in the video surveillance system. It is able to deliver vocal info instantly and receive feedback at the same time. Also, the recording contains audio evidence from both sides. HDCVI supports broadcast-quality audio, with more than 20dB SNR and 5 meter audio collection range.
Overview
HDCVI technology is the first on the HD-over-Coax market to realize audio transmission over coaxial cable. Audio information can bring supplementary evidence for video surveillance. In order to provide users with a lossless and real-time auditory experience and a high-quality video & audio surveillance solution, HDCVI brings the advanced DAC (Digital Audio-over-Coax) technology to the HD-over-Coax industry.
Key Features
Audio-over-Coax
DAC technology is able to transmit audio and video over the same coaxial cable, which greatly simplifies installations and saves labor and maintenance costs.
Digital Audio Signal Transmission
The digital signal transmission technology converts analog audio signal collected from a sound pick-up or a built-mic into a digital audio signal with low level of noise and distortion.
High-Quality Audio
With the lossless and real-time digital audio signal transmission, DAC technology can better restore the audio of the monitored site with lower noise.
• Better System Deployment
All HDCVI XVR models support audio-over-coax. Users only need to change a camera to directly upgrade from non-audio to audio solution, significantly protecting users’ investment.