{"id":26431,"date":"2021-09-29T06:27:00","date_gmt":"2021-09-29T11:27:00","guid":{"rendered":"https:\/\/learncctv.com\/?p=26431"},"modified":"2021-09-29T06:27:00","modified_gmt":"2021-09-29T11:27:00","slug":"how-does-a-video-encoder-work","status":"publish","type":"post","link":"https:\/\/learncctv.com\/how-does-a-video-encoder-work\/","title":{"rendered":"How does a video encoder for CCTV work?"},"content":{"rendered":"

In this article, I answer the question, “<\/span>How does a video encoder for CCTV work?<\/span><\/em><\/strong>” If you want to learn about this topic, just keep reading.<\/span><\/p>\n

\"Wondering<\/p>\n

If you are looking for information on how a video encoder works, chances are you still use analog cameras or have a project to update an analog CCTV system, right?<\/span><\/p>\n

So, you are in the right place. Video encoders can help you migrate a traditional analog CCTV camera into a modern IP system and use digital recorders such as NVRs (Network Video Recorder) and VMSs (Video Management Systems).<\/span><\/p>\n

Let’s dive into the topic…<\/span><\/p>\n

What are videos encoders ?<\/span><\/h2>\n

Video encoders <\/strong>are devices designed to convert analog to digita<\/strong>l<\/strong> signals. <\/span><\/p>\n

\"Encoder<\/p>\n

Analog camera connected to an encoder (Click to enlarge)<\/p>\n

They are not exclusively used for CCTV systems since you can also find encoders in other industries; however, this article focuses only on video encoders for CCTV.<\/span><\/p>\n

It’s possible to use a video encoder not only to convert analog to digital signals but also to control PTZ (Pan Tilt Zoom) <\/a>cameras, remotely adjust the video parameters, transmit audio and work with video analytics.<\/p>\n

Let’s say you have an old expensive PTZ camera<\/strong> with great image quality, and you intend to keep using it to record videos in a new IP security camera system. You can use an encoder to get the job done.<\/p>\n

The following diagram shows an example of the use of an encoder.<\/p>\n

\"Surveillance<\/p>\n

An encoder converts analog to digital signal (click to enlarge)<\/p>\n

As you can see, the analog camera is connected to a coax (analog) cable and to an encoder that converts the signal from analog to digital to send it to a network switch,<\/p>\n

The digital signal<\/strong> is transmitted to a local VMS Server for high-quality video recording and to a remote Cloud Server for backup recording.<\/p>\n

By using the appropriate video encoder, it’s also possible to remotely control the camera’s horizontal\/vertical rotation and control the zoom in and out as well.<\/p>\n

Stand-alone and rack-mounted videos encoders<\/span><\/h2>\n

You can use a stand-alone encoder to connect to few cameras or a rack-mounted encoder that allows you to scale the system to hundreds of cameras.<\/p>\n

Let’s take a look at their differences.<\/p>\n

Stand-alone video encoders<\/span><\/h3>\n

Video encoders with 1 to 16 ports are practical and flexible.<\/p>\n

Suppose you need to convert the signal of analog cameras that are far away from the surveillance room. You can install stand-alone encoders in small racks located close to the cameras and save money by reducing the cabling and contractor’s working hours.<\/p>\n

\"Stand-alone<\/p>\n

Analog cameras connected to an encoder (Click to enlarge)<\/p>\n

You can either use an existing network infrastructure with UTP cables to transmit the digital signals or create a new one with fewer cables since it’s necessary only one UTP cable to carry the signal of multiple cameras connected to the encoder.<\/p>\n

It’s possible to have remote access to the encoder using a web browser in the VMS server or monitoring station. Most encoders use only one IP for management, even if they have multiple channels (like the one in the diagram).<\/p>\n

You can also connect a PTZ camera to the encoder and use a separated pair of wires or the Coaxitron protocol<\/strong> to send commands to control de camera.<\/p>\n

Rack-mounted video encoders<\/span><\/h3>\n

Depending on the project needs, it’s better to use rack-mounted encoders.<\/p>\n

The idea is to bring all the coax cables from the analog cameras and to a centralized rack in a control room, and convert the signal in the encoders that are mounted in a chassis that connects multiple blade encoders.<\/p>\n

This type of installation allows you to expand the system by installing more blades or extra chassis. Some video encoder racks can support up to 84 channels.<\/p>\n

\"Rack<\/p>\n

Video Encoder Rack for up to 84 cameras (Click to Enlarge)<\/p>\n

This type of project is no longer that popular because nowadays, it’s better to use IP cameras instead of converting the signal from analog ones.<\/p>\n

Anyway, it’s still a viable solution to migrate large existing analog CCTV systems.<\/p>\n

Conclusion<\/span><\/h2>\n

Video encoders for CCTV are devices used to convert analog signals to digital ones, thus allowing traditional analog cameras to integrate into IP systems.<\/p>\n

It’s possible to use stand-along encoders with one or multiple channels or rack-mounted encoders that support encoder blades and are expansible.<\/p>\n

I hope this article can help you; please share it with your friends.<\/p>\n","protected":false},"excerpt":{"rendered":"

In this article, I answer the question, “How does a video encoder for CCTV work?” If you want to learn about this topic, just keep reading. If you are looking for information on how a video encoder works, chances are you still use analog cameras or have a project to update an analog CCTV system, […]<\/p>\n","protected":false},"author":1,"featured_media":26456,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[118],"tags":[],"class_list":["post-26431","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cctv"],"yoast_head":"\nHow does a video encoder for CCTV work? - Learn CCTV.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/learncctv.com\/how-does-a-video-encoder-work\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How does a video encoder for CCTV work? - Learn CCTV.com\" \/>\n<meta property=\"og:description\" content=\"In this article, I answer the question, “How does a video encoder for CCTV work?” If you want to learn about this topic, just keep reading. 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