Upgrading a surveillance system can be a challenge if old coaxial cables (e.g., RG59 and RG6) are embedded in the walls and cannot be replaced due to completed renovations or other constraints. However, technologies like HDCVI (Dahua), Turbo HD (Hikvision), and EoC (Ethernet over Coaxial) enable the installation of modern, high-resolution surveillance systems, including 4K, without the need to replace existing cables. Let’s explore the main features, advantages, and disadvantages of these solutions, along with their analytical functions and image quality characteristics.
HDCVI (High Definition Composite Video Interface) is a technology developed by Dahua to transmit high-definition video signals over coaxial cables, including RG59 and RG6.
Specifications:
• Supports resolutions up to 4K (3840x2160).
Transmission distance:
• Up to 500 meters for HD (720p) and Full HD (1080p) cameras over RG59.
• Up to 300 meters for 4K cameras over RG59.
• Up to 700 meters using RG6.
• Transmission of video, audio, and control signals over a single cable.
• Supports PTZ (pan/tilt/zoom) functionality via coaxial cable.
• Compatible with existing analog cameras, simplifying the upgrade process.
Support for Modern Features:
HDCVI systems support mobile apps like Dahua DMSS, allowing remote management, event notifications, and archive viewing. Advanced HDCVI recorders also provide analytical functions such as facial recognition, line crossing detection, and people counting.
Turbo HD is a similar technology developed by Hikvision, allowing the transmission of high-definition video signals over coaxial cables, including RG59 and RG6.
Specifications:
• Supports resolutions up to 4K Ultra HD.
Transmission distance:
• Up to 500 meters using RG59.
• Up to 800 meters using RG6.
• Compatible with both analog and Turbo HD cameras.
• Transmission of video, audio, and data over a single cable.
Support for Modern Features:
Turbo HD systems work with the Hik-Connect mobile app, providing remote access, live viewing, and analytical features. Advanced Turbo HD recorders support basic analytics like motion detection, line crossing, and intrusion detection.
EoC technology allows the transmission of network data (Ethernet) over existing coaxial cables, enabling the use of IP cameras and other modern devices.
Specifications:
• Data transmission speeds up to 1 Gbps (depending on the equipment and cable condition).
• Supports the connection of IP cameras and other network devices.
• Transmission distance of up to 500 meters without amplifiers.
Advantages of IP Cameras:
IP cameras provide superior image quality due to their high-quality components:
• Sensor: Improved light sensitivity and dynamic range.
• Lens: More sophisticated and precise construction for detailed imaging.
• Processor: Local data processing capabilities, such as analytics (facial recognition, object counting, motion detection).
These cameras support video analytics and remote management through apps and web interfaces. For example, Dahua and Hikvision solutions integrate with cloud platforms and IoT systems.
Which to Choose?
1. HDCVI and Turbo HD:
Ideal for upgrading older systems with minimal costs. They allow the use of modern analytics and mobile apps while maintaining support for RG59 and RG6 cables.
2. EoC and IP Cameras:
If the priority is the highest image quality and advanced analytical functions, IP cameras are the best choice. They offer superior components (sensors, lenses, processors) and advanced technologies like deep learning.
Comparison Table
| Technology & Resolution | Image Quality | Analytics & App |
|---|---|---|
| HDCVI (Dahua) - Up to 4K | High, but limited by the camera | Basic analytics, Dahua DMSS |
| Turbo HD (Hikvision) - Up to 4K | High, but limited by the camera | Basic analytics, Hik-Connect |
| EoC - Up to 4K and beyond | Superior | Advanced analytics, Any IP app |
Conclusion
HDCVI and Turbo HD systems are optimal solutions for upgrades without significant costs, as they support even older RG59 cables. They provide high resolution and allow for the use of modern features. However, if the goal is the highest image quality and the most advanced analytical functions, EoC technology with IP cameras is the better choice, despite its higher cost.
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