AHD Cameras

AHD cameras, also known as Analog HD CCTV cameras, have an availability to capturing high definition video surveillance at 720p and 1080p resolutions.  AHD security cameras must be used with a AHD compatible DVR. CCTV Camera Pros supplies hybrid AHD / CCTV DVRs that work with both AHD and traditional analog CCTV cameras so that users can mix and match a combinations of both camera types. AHD CCTV cameras are connected to DVRs using the same type of coaxial cable as traditional analog CCTV cameras, typically RG59 or RG6 coax cable. One of the big edge of AHD over HD-SDI cameras (another HD over coax security camera standard), is that RG59 coax cable can be run long distances without video loss. So far in our experience, installers can reliably use RG59 coax cable up to a max distance of 800 feet for AHD cameras. AHD cameras can also use UTP cable with video baluns to run cable up to 320 Meters / 960 feet with CAT5 cable.

AHD vs 960H Video Resolution
The below images compare a video surveillance photo capture by a 960H CCTV camera with 720p and 1080p AHD CCTV cameras. The first two cameras where connected to an iDVR-E8 DVR to capture the images. The 1080p camera was connected to an iDVR-PRO AHD / HD-TVI / analog CCTV hybrid DVR. When we first wrote this article, 1080p AHD cameras were not yet available.  iDVR-PRO recorders work with analog, 720p and 1080p cameras (AHD and HD-TVI).
The analog and 720p AHD camera were both displayed full screen at 720p resolution when the image was captured. The 1080p AHD camera was displayed at 1080p resolution. Please click on the images to see a full size view.

Analog 960h vs 720p AHD
Watch this video to see a comparison of analog CCTV standard definition vs HD video surveillance footage. This first video compares 960h analog CCTV resolution to a 720p AHD camera. Adjust the YouTube video player to 720p resolution and full screen to really compare and see the difference.

Analog 960h vs 1080p AHD Camera
This next video compares a 1080p AHD camera to an analog CCTV camera. Both cameras are connected to the same AHD DVR (it supports analog cameras too). The resolution of the analog camera is 960 x 480. Watch to see what a difference the higher resolution makes when it comes to digitally zooming in for facial recognition.

In today’s world, security and surveillance are paramount. Whether you’re securing your home, business, or any other property, having a reliable and high-quality camera system is essential. Among the various options available, AHD cameras have gained significant popularity due to their superior performance and affordability. This comprehensive guide will delve into AHD cameras, explaining what they are, their advantages, and why they might be the perfect solution for your surveillance needs.

What Are AHD Cameras?

AHD stands for Analog High Definition. AHD cameras are a type of surveillance camera that offers high-definition video quality using analog technology. Unlike traditional analog cameras, which typically provide lower resolution, AHD cameras deliver crisp and clear images with high resolution, typically ranging from 720p to 1080p. The technology behind AHD cameras involves transmitting high-definition video signals over coaxial cables, which were traditionally used for standard analog cameras. This allows AHD cameras to offer high-definition video quality while maintaining compatibility with existing analog infrastructure.

Advantages of AHD Cameras

1. High-Definition Video Quality

One of the most significant advantages of AHD cameras is their ability to provide high-definition video quality. With resolutions ranging from 720p to 1080p, AHD cameras deliver clear and detailed images, making it easier to identify faces, license plates, and other crucial details. This high-definition capability is particularly important for surveillance purposes, where clarity and precision are vital.

2. Cost-Effective Solution

AHD cameras are a cost-effective option compared to other high-definition surveillance technologies. While IP (Internet Protocol) cameras offer similar high-definition quality, they often come with a higher price tag and require a more complex installation process. AHD cameras, on the other hand, utilize existing coaxial cables, reducing the overall cost of the camera system.

3. Easy Installation and Compatibility

Installing AHD cameras is straightforward, especially if you are upgrading from a traditional analog camera system. AHD cameras are compatible with existing analog infrastructure, including coaxial cables and DVRs (Digital Video Recorders). This ease of installation makes AHD cameras an attractive option for those looking to enhance their surveillance system without overhauling their entire setup.

4. Reliable Performance

AHD cameras are known for their reliable performance. They provide stable video signals over long distances without significant loss of quality. This reliability is crucial for maintaining consistent surveillance coverage and ensuring that your security system functions effectively.

5. Analog Signal Transmission

Unlike IP cameras that transmit video data over a network, AHD cameras use analog signal transmission. This can be advantageous in certain scenarios, such as when dealing with network limitations or security concerns related to digital data transmission. Analog signal transmission also minimizes the risk of hacking or unauthorized access to video feeds.

6. Versatility in Use

AHD cameras come in various types and configurations to suit different surveillance needs. Whether you require indoor or outdoor cameras, fixed or PTZ (Pan-Tilt-Zoom) cameras, there is likely an AHD camera that fits your requirements. This versatility makes AHD cameras a flexible solution for various security applications.

How AHD Cameras Work

AHD cameras operate by capturing video footage through their lens and converting it into a high-definition analog signal. This signal is then transmitted over coaxial cables to a DVR, which records and stores the footage for later review. The DVR also processes the video feed, allowing for live monitoring and playback. The key technology behind AHD cameras is the use of analog high-definition signals, which are capable of transmitting high-resolution video over traditional coaxial cables. This is achieved through a technology called “analog high definition” encoding, which compresses and encodes the video signal to maintain high quality while being transmitted over long distances.

Comparing AHD Cameras to Other Surveillance Technologies

1. AHD Cameras vs. IP Cameras

IP cameras are another popular choice for high-definition surveillance. They offer several advantages, such as higher resolutions (up to 4K), advanced features like motion detection and analytics, and the ability to be accessed remotely via the internet. However, IP cameras often come with higher costs and more complex installation requirements.

AHD cameras provide a cost-effective alternative with comparable video quality. They utilize existing coaxial cables, making them easier and more affordable to install. While IP cameras may offer more advanced features, AHD cameras provide a reliable and budget-friendly solution for those who need high-definition video without the additional complexity.

2. AHD Cameras vs. HD-CVI and HD-TVI Cameras

HD-CVI (High Definition Composite Video Interface) and HD-TVI (High Definition Transport Video Interface) are two other analog high-definition surveillance technologies. Like AHD cameras, both HD-CVI and HD-TVI cameras offer high-definition video quality over coaxial cables.

The primary difference between these technologies lies in their signal encoding and transmission methods. AHD cameras use an open standard, which means they are generally compatible with a wider range of equipment. HD-CVI and HD-TVI cameras may have proprietary technologies that limit compatibility with certain DVRs or other devices.