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H.264 video may soon step aside for twice-as-efficient H.265

by Alistair Lowe on 16 August 2012, 10:00

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Since its release in 2003, H.264, the Advanced Video Coding standard, has witnessed mass-adaptation thanks to its ability to offer both improved compression against standard MPEG4 codecs and exceptional quality at high bit-rates, forming the basis of the bandwidth concious YouTube video service, yet also the quality imperative Blu-ray video format.

Whilst we were all away for the summer, however, MPEG produced a first draft, with the input and feedback of almost 450 industry professionals, of the H.265 High Efficiency Video Coding (HVEC) standard, which will look to replace H.264 in the future, enticing companies and chip designers with the prospects of twice the efficiency of the soon to be decade-old H.264 spec.

H.265 for 4K TV

Half the bandwidth means twice the number of TV channels, twice as much streaming on a mobile data plan or potentially twice the resolution at the same bit-rate - perhaps an important step towards ratifying a broadcast 4K video standard. With all this in mind, the industry is likely to get behind H.265 fairly quickly, which is the hope of MPEG, who expects that the new technology could find its way into devices as early as next year.

It looks like it'll soon be time to buy a new tablet computer to support the new format... again.



HEXUS Forums :: 5 Comments

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So, how many patents will there be in this “standard”?
Lots of work for Ericsson in the near future then.

I think the internet will take this up quickly but broadcast could take ~10 years… Meaning iptv will probably take over from ota tv within that time.

Interested to know if the efficiency is only relative to results and how encoding time and power is affected. I suspect the GOP length will now be mahoosive!
Harumph!

Why couldn't they have figured this out before all the broadcasters chose a spec? :( If it's twice as efficient, that would mean 1080p broadcasts in the same space as we currently have 1080i (I know the beeb occasionally broadcast 1080p on DVB-T2 but it seems problematic for a lot of people)……..but are we likely to see it in the next 10-20 years? The best chance would be Sky…..and even that seems unlikely to happen until they adopt the 4k standards…….so don't hold your breath………
Steve
So, how many patents will there be in this “standard”?
At least a dozen or two, I'm sure.
http://en.wikipedia.org/wiki/High_Efficiency_Video_Coding

In short, the biggest compression gains are due to more efficient and adaptive coding blocks sizes organized in a coding tree (quadtree) and better/extended temporal prediction support. There are other optimizations but these two seem to be most responsible for x.265 (or HEVC, “MPEG-5”?) comparing - favorably so - with MPEG-4 AVC in terms of quality per bitrate, even though it will require more processing power to encode/decode. I suspect most set-top-boxes out there would be too slow in decoding high profile HEVC (level 4 and up, or 1080p and beyond) and will, at the very least, require new firmwares to decode any. In the mean time, the “8x8 Transform” (also featured among many Handbrake's advanced settings) should enable similar additional compression without sacrificing quality and/or playback support with current decoders and a small computational overhead.