H.265 is the next-generation video compression format that is twice as efficient as H.264, the current industry standard. It enables higher quality streaming of CCTV images, reduces storage requirements and provides crystal clear images.
Since HD is the ultimate trend, H.265 is crucial in getting 4K “Ultra HD” contents to our televisions, PCs and tablets over the next few years. Achieving those objectives depends on the core components of the H.265 codec that are used. There are some cheap systems which claim to do so, in reality not all full HD CCTV systems are equal.
You wouldn’t buy an old analogue TV anymore (even if you could get one), so why would you attempt to protect your home or business with grainy images that are lacking in detail. You wouldn’t and we understand why. We offer the latest high defination equipment for CCTV with perfect image for use day or night.
What is H.265 and why is it important?
H.265 is a video compression format that delivers crisper network video contents and requires 50% less bandwidth for the same image quality as H.264, making it easier to download or stream HD video. Advanced Overwatch customers can view Full HD contents online with our mobile devices such as mobile phones and tablets.
H.265 supports 4K (4096×2160) and 8K (8192×4320) Ultra HD (UHD) contents as well. This makes H.265 an ideal technology for delivering high-quality IP video of your home or place of business.
The H.264 standard has dominated the market for the past five years. Now, with H.265 our customers can take advantage of H.265 and the best-fit applications that we provide. The following explains the H.265 codec and how we use it as part of our CCTV deployment for our clients.
H.265 Technical Information
H.265 is a video compression standard, a successor to H.264, that was jointly developed by the ITU-T Video Coding Experts Group (VCEG) and related groups.
On August 22, 2012, Ericsson announced the world’s first H.265 encoder, the Ericsson SVP 5500. In only six months, H.265 (also known as High Efficiency Video Coding, HEVC) was approved as the official successor to H.264 as an ITU-T standard.
H.265 is said to double the data compression ratio compared to H.264 at the same level of video quality. It can alternatively be used to provide substantially improved video quality at the same bit rate. It can support 8K UHD and resolutions up to 8192×4320.
H.265 was designed to significantly increase coding efficiency compared to H.264 – that is, to reduce bit rate requirements by half with comparable image quality. Depending on the application requirements, H.265 encoders can mitigate computational complexity; improve compression rate, robustness and error correction; and reduce encoding latency. While H.264 can transfer SD contents in 1Mbps, H.265 is able to transfer 720p (1280×720) and HD content in 1-2 Mbps.
Why is H.265 better for me?
Understanding the ins and outs of video compression can be daunting. Advanced Overwatch have in-depth knowledge of this technology.
H.265/HEVC video coding uses the same approach as H.264/AVC, including inter-/ intra-picture prediction, transform coding, quantization, deblocking filter, and entropy coding. But H.265/HEVC comprises coding units (CUs), predict units (PUs) and transform units (TUs).
Compared to H.264/AV, H.265/HEVC provides different methods to reduce the compression rate. Each marcoblock in H.264/AVC is 16×16 pixels, while in H.265/ HEVC the marcoblock provides different options, from 8×8, 16×16 to 64×64 pixels. What H.265 does is analysing video contents and breaking them down into CUs of different sizes. For example, it would take much smaller blocks (down to 4×4 pixels) to encode detailed areas, like a vehicle in a car park, and much bigger blocks to encode the background, which contains less video data.
H.265 employs 33 directional modes for intra-prediction, compared to the 8 directional modes for intra-prediction used by H.264. With the same image quality, H.265 delivers 39 to 44% less decoding bit streams than H.264. This result may vary with different quality assurance methods.
Peak signal-to-noise ratio (PSNR) and subjective assessment of video quality are standard ways to measure the coding efficiency of a video coding mechanism. In a subjective assessment of video quality, H.265 delivers the same or better coding efficiency than H.264 with bit streams reduced by 51 to 74%. This result is very important since subjective assessment of video quality is considered to be the most important way to measure a video coding standard, as humans perceive video quality subjectively.
Like H.264, which uses the Main, Baseline and Simple profiles, the first approved version of the HEVC/H.265 standard includes Main, Main 10, and Main Still Picture profiles.
The Main profile supports bit depth of 8 bits per sample, which allows for 256 shades per primary color, translating into a total of 16.8 million colors. The Main 10 profile supports bit depth of 10 bits per sample, which allows for 1024 shades per primary color or a total of 1.1 billion colors, making it ideal for UHDTV. They both use 4:2:0 chroma sampling.
HEVC also contains provisions for additional profiles. Future extensions that are being discussed for HEVC include increased bit depth, 4:2:2 and 4:4:4 chroma sampling, multiview video coding (MVC), and scalable video coding (SVC). On January 8, 2013, Broadcom announced in CES the BCM7445, which is an Ultra HD decoding chip capable of decoding HEVC of up to 4096x2160p at 60 fps. The BCM7445 is a 28-nm ARM-architecture chip capable of 21,000 Dhrystone MIPS.
H.265 has more superior features than H.264, all around its is much better for the security recording and streaming of your images. Since H.265 is the future of television and video it is the mainstream for quality in security and surveillance. As a professional surveillance company, H.265 deployment in security and surveillance applications for our customers is the most frequent choice for high quality recording and streaming of IP CCTV images.
H.265 CCTV installation, monitoring and maintenance
If you need advice on your CCTV system or are ready to have one installed by an experienced and knowledgeable CCTV installer, please visit our contact page by clicking here or give us a call on: 02870 878077 for a free, no obligation expert survey.