What is H.264/H.265 Compression?


First created in the CCTV industry in 2003, H.264 is the industry standard for video compression in CCTV. Compared to older technologies, H.264 has the advantage of offering a high compression ratio, while maintaining excellent video quality for security applications. H.264's higher compression ratio (up to two times better than prior-generation technology) effectively increases storage capacity, producing smaller file sizes and therefore, longer recording time on a hard drive. The use of H.264 allows high-quality images to be transmitted over networks at very low bit rates. Security systems that involve multiple cameras can quickly exceed the available network bandwidth without efficient compression. Older codec formats (MPEG-4 and MJPEG) are obsolete, now with the industry adopting H.264 as the primary codec in DVRS.


First created in the CCTV industry in 2016, H.265 primary was used for IP NVRS and IP cameras. H.265 has all the same features as H.264 but the advantage of using H.265 rather than using H.264 is down to the compression of the data being sent to the hard drive. When recording to a hard drive using a H.265 NVR and IP camera, you will save up to 40% space due to the compression producing smaller files, therefore even longer recording time on a hard drive over H.264 compression. Now in 2019 we are seeing the ground-breaking technology being adopted into DVRs, with the first instalment of DVRs being released into the UK market early summer. With the rise in Mega pixel cameras, some up to 4K, H.264 will not last for much longer and most probably be phased out at the end of 2019.




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