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4k and H.265 compression

Driven by ever growing demand for high definition and the development of image processing, 4k is definitely a buzz word on the market, playing an increasingly vital role in video surveillance, in applications such as parking, harbours, and large open spaces, says the Chinese manufacturer Dahua Technology.

4k can capture detail, which, at the same time, puts pressure on decoding and storage. Dahua says that it sees a future there with the introduction and development of H.265, which brings extensive possibilities by addressing problems such as shortage of bandwidth and improving transmission efficiency.

High Efficiency Video Coding (HEVC), also known as H.265, is a proposed video compression standard, a successor to H.264/MPEG-4 AVC (Advanced Video Coding), under joint development by the ISO/IEC Moving Picture Experts Group (MPEG) and ITU-T Video Coding Experts Group (VCEG). Compared to the current mainstream AVC standard H.264, H.265 is said to be capable of further reducing by 50 per cent the data rate requested for high quality video coding. Bitrate is acclaimed to have around 40pc to 50pc down at 1080p while rendering quality images.

In summary, first, H.265 can downsize video footage to a great extent while playing fairly smooth video with low bandwidth, and all these benefits further drives market demand on 4K/Ultra HD; second, with the fast development of 4G and mobile, the integration between the two industries will offer many more possibilities. The H.265 compression standard is still new to video surveillance, which means it will take some time to be adopted and adapted. Dahua Technology has adopted H.265 in its latest products, including network cameras, NVRs, transmission devices and video-wall systems.

To start with cameras, Dahua has a 5.0-Megapixel smart network camera that uses H.265/H.264 dual codec, allowing over 40 per cent less bandwidth use, according to the company. Moreover, with its functions such as de-fog, and intelligent detections, the camera can make surveillance clearer, smarter and smoother, the firm says. Dahua says that it can foresee more H.265 cameras in different resolution.

When it comes to back-end devices, Dahua says that it was the first in the industry to introduce a H.265 4K NVR product line-up, which covers various demands, including small-to-medium as well as large-scale applications. These NVRs offer up to 12.0-Megapixel decoding, supporting 1080P at 60fps and H.265 preview and playback; and four-channel 4K real-time live view and playback. Behavioural analysis and facial detection are also supported. What’s worth mentioning is that the R&D team put energy at the planning phase to make the product ec0-friendly. Dahua also introduced a control platform M70 with H.265. This can decode multiple channels of H.265 videos at the same time; and thanks to modular design, M70 can handle up to 40-channel UHD video outputs with each supporting H.265 decoding. These HD output videos can be presented as an integrated image by combining HD outputs.

James Wang, Product Director of Dahua Technology, said: “Obviously, H.265 is one of the major compression standard that allow us to implement UHD solutions, such as 4K or even 8K, which is definitely the trend of video surveillance. The benefits H.265 brings are not limited to the above, just like a magician hat, you can expect much more from it, for example, our R&D has carried out some great performances on bitrate control, image quality balance as well as intelligent analytics and tracking. I always feel thrilled towards new things and technologies as they have the potential to nourish many new possibilities, to bring products, industry, even the society to a better shape. H.265 is just the case, we have confidence to tap out of the potential of this standard and make full use of it, so my advice is stay with us, stay with the latest trend and see how we use it as a magic.”


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