Industry News

GWSECU High Definition IP Cameras: H.265 VS H.264

    2016-03-07 15:07
With the rapid development of IP video surveillance technology, the current H.264 (MPEG-4/AVC) standard no longer meets the requirement of video encoding for higher image resolution. Especially, 4K UHD and 8K UHD video equipment will inevitably become the trend in the future. As the next generation video compression standard, H.265 comes into market. H.265, High Efficiency Video Coding (HEVC) has been gradually adopted in high definition IP surveillance products such as H.265 IP cameras, H.265 NVR.
As the leading HD video solution providers, both Hisilicon and Ambarella developed high performance SoCs which feature 4K UHD video encoding with H.265/HEVC standard supported. The difference between H.264 and H.265 becomes hot topic recently, many users show the great interest on H.265 IP cameras and NVRs, because the new video coding standard brings promise of huge bandwidth savings of approximate 40-50% over H.264 encoded content with similar quality. In short, the H.265 has the ability to offer higher quality video for bandwidth constrained network connection. This means when using H.265 IP cameras, user will experience high video quality with smooth playing, no or less time on video latency.
HEVC/H.265 mainly features in the following aspects:
>Higher compression efficiency, when compared with H.264/AVC. In same resolution, HEVC/H.265 has lower bitrate than H.264/HEVC.
>Support high definition, ultra high definition video formats
>Support frame rate of 20-60 frame per second video decoding, has same flexibility like the H.264/AVC, supports maximum 172fps.
>Friendly network adaptation.
In order to solve the high bandwidth problem for ultra high definition, the Moving Picture Experts Group (MPEG) developed the H.265/High Efficiency Video Coding. Compared with current mainstream H.264/MPEG-4 AVC, the H.265 is able to double the data compression ratio, while improve video quality with low bit-rate. The H.265 supports both 4K UHD and 8K UHD resolution up to 8192x4320. In conclusion, H.265 is capable of further reducing 50% the data rate requested for high quality video coding. Bitrate is acclaimed to have approximate 40% to 50% down at 1080p while rendering superb image quality. This enables IP camera to deliver smooth video with low bandwidth, which in turn, reducing the network bandwidth, and video storage size. 
What's the meaning to IP cameras? Under the same image quality condition, utilizing H.265 IP cameras can save 50% bandwidth and video storage. Let's compare the usage of storage that a 100pcs 1080P IP cameras project when choosing H.264 and H.265 different standards.

An IP video surveillance project that includes 100pcs full HD 1080p IP cameras, using H.265 encoding can save 62 terabyte storage space, 4TB per HDD, can save approx. 15.5 HDDs, if the cost of 4TB HDD is US$140, you can save US$2170 budget for this project, so the benefit is so obvious.
Apparently, the introduction and development of H.265 standard brings extensive possibilities and optimism to the industry by addressing problems such as shortage of bandwidth, improving transmission efficiency and delivers other benefits.


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