HD-SDI Cameras

HD-SDI Cameras from EZWatch can record at full, high definition 1080p resolution at 30 frames per second.

  • 1080p - High Definition Recording
  • Indoor & Outdoor Options 
  • Motion Detection & Privacy Masking
  • Lifetime Technical Support
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HD-SDI Security Camera Basics

HD is a standards based format governed by the Society of Motion Picture and Television Engineers (SMPTE) that not only guarantees resolution (720P, 1080i or 1080P) but also the 16:9 widescreen format, frame rate and color fidelity of the video. The most common standards are: SMPTE 296M or HD 720P which uses 720 scan lines and a refresh rate of 30 progressive scans per second, SMPTE 274M or HD 1080 using 1,080 interlaced (1080i) or progressive (1080P) scan lines and a refresh rate of 30 or 60 Hertz which corresponds to 30 or 60 frames per second.

Important difference between HD & Megapixel

Megapixel strictly applies to one part of the image: the number of pixels in the field of view. Megapixel has no meaning in terms of frame rate, aspect ratio or color fidelity performance of the video. Just because a camera has a higher Megapixel count does not necessarily mean it will provide higher usable video quality than a camera with a lower Megapixel count running in HD-SDI.

High Definition Surveillance

To guarantee real time 1080p HD Video, connecting your HD-SDI Cameras to an HD-SDI DVR is an ABSOLUTE MUST.

Is there a downside to Recording in Full HD?

HD-SDI cameras and DVR's will provide the best live and recorded video available anywhere, but because of the far greater detail being captured by HD-SDI systems, additional storage capacity will be necessary. Most projections suggest that HD Security Camera Systems require about 3x the HDD storage capacity of regular Analog PC DVR Systems. Plan accordingly and grab an extra 1TB hard drive or 2TB hard drive with your system if you're going to be putting these systems through their paces.

HD-SDI Video Security Systems

  • How they work and why the image quality is so much better at 1080p
  • Value of high quality images for absolute identification
  • Storage Capacity needed for recording HD Video

Today’s HD security cameras are capable of capturing more detail than ever before, but what does HD really mean? High Definition (HD) generally refers to the number of pixels that make up the pictures recorded and displayed by a video system. Pixels are tiny square shaped dots of color that work together to make an image; the more pixels your image has, the more detail it will have. If you take a magnifying glass to your television or monitor you’ll notice thousands of these little pixels arranged in a hundreds of lines.

For your video to be considered HD, it must have a minimum of 720 horizontal lines of pixels and 1,280 vertical lines – that’s called a “HD 720 Resolution”. Sometimes you’ll see a “p” or “i” next to the number (i.e. 720p). The “p” stands for progressive and the “i” stands for interlaced; these terms refer to how the lines appear on your monitor. Video with interlaced resolution displays half the lines of resolution at a time (alternating very quickly between the odd and even numbered lines). Video with progressive resolution displays all lines (and thus twice the resolution) at all times. Therefore, a 720p resolution is better than a 720i resolution.

Some of the highest performance video security systems available today can capture, record and playback video at 1080p. That means that each frame of video is made up of 1,080 horizontal lines of resolution and 1,920 vertical lines – all displayed all the time. If you rely on video evidence to protect your home or business, you may find 1080p video helps reveal fine details like tattoos, license plates, or other uniquely identifying characteristics that provide the necessary clues for investigators.

So what do you need to enjoy the benefits of 1080p video? For starters, you should look for a HD security camera listed as having at least 2.1 Megapixels – this figure represents the resolution 1,080 x 1,920 = 2,073,600 pixels or as its commonly abbreviated 2.1 Megapixels.

Next, you’ll want to make sure the camera has a SDI (Serial Digital Interface) connection. This will ensure your digital signal is correctly transmitted to your recording device and all the detail is maintained. Cameras with the SDI connection often contain the term HD-SDI in their description.

Finally, since HD video contains more detail than standard definition video, storing this video will require more space on your hard drive. Calculating the amount of hard drive space required is based on a multivariable equation that can be a bit tricky. If you consider yourself a beginner, you should consider that 1080p video requires 10% more hard drive space than 720p, and 20% more than VGA.

The following variables are considered when determining exact storage requirements.

  • How many cameras are being recorded.
  • The resolution being recorded (i.e. 1080p)
  • How many frames per second (i.e. 24fps)
    • 24fps is the standard for fil. Surveillance video is frequently set anywhere between 5-30fps. The more frames per second, the smoother the video quality will appear.
    • High FPS is important for fast moving scenes like intersections.
  • Will the recording be continuous, during business hours only, or simply based upon motion detection?
    • Video security systems can be set to only record when they detect movement in a cameras field of view. Estimates need to be made on the percentage of time that a camera has movement.
  • What type of compression / encoding is being used?
    • H.264 is the industry standard for efficient encoding. Compression and encoding are the technologies that “squeeze” the video file into its smallest possible form factor to allow for greater video quality with a smaller digital footprint.
  • Whether or not audio is being recorded.

A few examples:

  • 1 1080p HD camera at an intersection recording video for 7 days will require 41.8GB under the following conditions:
    • 24 FPS Framerate
    • H.264 Encoding
    • 30% Compression
    • No Audio
    • 24 Hours/Day Continuous Recording
    • Good Lighting Conditions
  • 1 1080p HD camera at a schoolyard recording video for 7 days will require 25.0GB under the following conditions:
    • 18 FPS Framerate
    • H.264 Encoding
    • 30% Compression
    • No Audio
    • 24 Hours/Day Continuous Recording
    • Typical Lighting Conditions
  • 1 1080p HD camera in a stairway recording video for 7 days will require 7.7GB under the following conditions:
    • 18 FPS Framerate
    • H.264 Encoding
    • 30% Compression
    • No Audio
    • 20% of the day is being recorded based on motion detection
    • Good Lighting Conditions

Why should I choose HD-SDI Cameras?

If you want to have the best image quality possible from your Video Surveillance System you need to look for megapixel solutions. To have High Definition (720P or 1080P) there are two choices available. Firstly, you can install IP Cameras, but these typically require networking knowledge and special wiring. The other choice is the use of HD-SDI cameras and an HD-SDI DVR. This is, by far, the least complicated method of assuring you have HD quality footage from your video surveillance system.

There are many advantages in choosing HD-SDI Cameras for your installation:

  • No installation or training required as they install just like any analog system.
  • All installers already know how to install analog systems.
  • No need for special wiring. Standard coaxial cable is all you need.
  • No dependence on an IP Network.
  • No lag time or frame rate interruptions.
  • Movie quality 1080p resolution footage.

HD-SDI Cameras transmit uncompressed 1080P digital signals. The digital signals are then compressed into the H.264 format for storage and play back at a later time. When you choose to pay back recorded video from HD-SDI Systems the video is decompressed to allow viewing in full 1080P High Definition. This footage is on the same level of quality that you see on HD television channels - no fuzzy picture quality here.

These HD Security Cameras provide up to six times higher resolution than standard definition video cameras. Due to a much larger digital signal, it is important to understand the amount of storage you will need on your hard drives when installing a HD-SDI system. Calculating the amount of hard drive space needed is based on the number of cameras recording and time period you want to save the stored video before you begin recording over the oldest recorded video. The decision to record only when motion is detected rather than recording all images 24 hours a day can heavily reduce the hard drive space required. While you can use our DVR Storage Calculator to get a rough estimate of hard drive space needed, it is always recommended to consult with professional system design experts from a highly reputable company to help with this decision.

All of our HD Cameras are available for any situation and will provide the highest quality images in bright daylight or complete darkness when you select the correct camera.

HD-SDI Indoor Dome Cameras are available with a various lens to provide a narrow field of view for hallways or other areas where you need to view greater distance in a narrow space. These HD Security Cameras are available with or with or without night vision capability.

Outdoor HD-SDI Dome Cameras should always be weather-rated to withstand the temperatures you expect to see at the location you plan to install the cameras. These cameras should also be waterproof and vandal resistant. These HD security cameras are available in a choice lens options, depending on the coverage area required, and almost always include night vision capabilities to provide crystal clear footage in darkness.

HD-SDI Box Cameras typically are available with a varifocal lens, but also allow the user to easily change the lens to any lens needed to provide the desired coverage.

HD-SDI Bullet Style Cameras come in many different shapes & sizes to fit into almost any application. Bullet cameras are able to view greater distances than most Dome cameras and are usually designed to be weather and vandal resistant. Most HD Bullet Style Cameras are equipped with excellent night vision.

HD-SDI PTZ Cameras offer the user the ability to cover a complete 360 degree field of view with the ability to zoom in on an object up to 400 feet away. Most of these HD PTZ Cameras allow for preset cruising tracks. The sequences can be set to let the camera scan from one position to the next in a cycle at a set speed. Built-in motion detection technology can detect motion in a defined video zoom and trigger an alarm. The HD-SDI PTZ Cameras may also be manually controlled with the use of a joystick controller.