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The Explanation of CCTV Codecs

You must need to know about the explanation of CCTV codecs. The “compression” section of a CCTV camera or video recorder’s specs may include a sequence of letters and digits (H.264, MJPEG, etc.). If you’re not familiar with CCTV, you could be perplexed by the abbreviations. CCTV codecs are a type of video compression format.

What is a CCTV Codec and how does it work?

Compression (CO) and decompression (D) are two separate processes in CCTV Camera codecs (DEC). When a video is created, it is compressed and then sent to a decompression device. Any extraneous data are removed from output videos to lower the file size. To conserve bandwidth and disk space, video compression is a need. Video will be decompressed and shown on a viewing device after compression. Depending on the type of CCTV system, this process for codecs will seem different.

Analog Devices and Methods For CCTV Codecs

Analog CCTV systems use video signals to store images captured by the camera. Digital video recording devices (DVRs) are used to transform these signals into digital video. Compression is handled by DVRs because they are the devices that record the video. Connected monitors can then decompress and show this compressed digital video from the DVR.

Infringement Prevention Measures With CCTV Codecs

The camera in an IP CCTV system already has the ability to record digital video. Because the camera produces the video, it must compress it as well. Decompressing the video and displaying it on a monitor or a remote device is done by the NVR that receives the video.

Codecs for CCTV cameras come in several varieties.

In order to reduce the file size of a CCTV video as much as possible while preserving the video’s quality, CCTV codecs are used to eliminate any unnecessary information. In order to do this, there are a number of different types of CCTV codecs. Four of the most prevalent codecs will be discussed.


You may already be familiar with the JPG or JPEG file format because photographs are stored in this format. Motion JPEG (MJPEG) is an abbreviation of the more formal JPEG format. Each frame of the video is analyzed and compressed by this codec before being sent to the receiver. In order to create the illusion of speed, the JPEG photos would be rapidly stacked on top of one another.


Like MJPEG, MPEG-4 decodes frames into whole and partial pictures, but unlike MJPEG, MPEG-4 exclusively deals with complete images. For the most part, MPEG-4 keeps the sections that don’t move, while isolating the ones that do move. Upon receipt, the gadget will then integrate all of the parts and pieces into a single, cohesive whole. Because there aren’t as many photographs to put together, the download size will be reduced.


This CCTV codec utilizes a more modern algorithm that consumes less bandwidth for transmission and storage than MPEG-4. H.264 is now the most used format, but a newer technique is gaining traction.


H.265 is the most recent CCTV codec. As with H.264, it’s more polished and powerful in its operation. When compared to H.264, this codec compresses video at a greater level while maintaining the same degree of quality. Since larger resolutions necessitate more bandwidth and storage, this standard is commonly used with 4K CCTV cameras. This is all about the explanation of CCTV Codecs.

FAQ (Frequently Asked Questions)

What video format is used by security cameras?

H. 264, often known as AVC, is a common video codec and compression method for security cameras. H.

What does the h264 camera mean?

Most IP cameras use H. 264, or MPEG-4 Part 10, Advanced Video Coding (MPEG-4 AVC), as their video compression standard. Video compression standards like H. 263 and MPEG-4 are aimed at providing better video quality at lower bitrates than prior standards like MPEG-2 and H. 263.

What is the most popular DVR compression format?

Video compression in security DVRs will now be done with H.264, the latest industry standard. For video recording, prior versions relied on MPEG-4 and even MJPEG. Security applications benefit from H. 264’s ability to give the maximum compression ratio while preserving good video quality at the same time.

Is H.264 an improvement over MJPEG among the CCTV Codecs explanation?

Less complicated scenes benefit the most from H. 264’s bit rate advantages since H. 264 can compress more efficiently across frames. MJPEG, on the other hand, does not compress between frames, therefore scenes with less complexity benefit less from this format.

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