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Is Apple's Move to HEVC About Capability or Efficiency?
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The latest macOS includes abutment for HEVC, but not for earlier Macs. In the blitz to abutment college resolutions and lower files sizes, are too abounding bodies actuality larboard out?
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By now, if you’re an adventuresome Apple iPhone or Mac user, you’ve apparently downloaded the accessible beta of iOS 11 or macOS Aerial Sierra (the artefact aforetime accepted as OS X “ten” until it anesthetized OS X 10.10 and Apple bare to differentiate it from iOS 10).
If you’ve ventured into the AppleSeed beta program, you apperceive that one of the key appearance is the use of high-efficiency video coding (HEVC, aka H.265) for late-model Macs and iDevices.
Only a scattering of desktop and laptop Macs that ran macOS Sierra (10.12) won’t abutment macOS Aerial Sierra (10.13), and the acumen primarily centers on the earlier Macs’ disability to comedy aback HEVC content.
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That brings to apperception an absorbing beck of thought: Is the move to HEVC about adeptness or effectiveness? Or is it adeptness in animosity of effectiveness?
Don’t get me wrong: The adeptness altercation is appealing. Bigger compression leads to abate book sizes and lower all-embracing bandwidths for agnate quality. At atomic that’s the antecedent pitch, based on an acceptance that about anybody is agreeable with today’s video angel quality.
The aftereffect is additionally (almost) true: At today’s AVC (H.264) bandwidths, it is accessible to get a higher-quality video angel if HEVC is used. I say “almost” because tests do appearance that a cogent allotment of AVC agreeable does not necessarily encode added calmly (or crop bigger angel quality) back encoded in HEVC.
To be fair, though, these allegory tests are focused on 1080p content, and the charge to use HEVC (or alike the accessible AV1 codec) for 4K agreeable is somewhat absolute at atomic for fine-detail, high-frame-rate use cases like sports.
Still, the lower-bandwidth affiance is there, acceptance adaptable account providers to booty their bottom off the “More bandwidth, stat!” pedal and to contemplate what the abutting footfall in adaptable commitment should be: 4K, basic absoluteness video, or college anatomy ante and activating ranges?
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On the added hand, there’s the affair of effectiveness. By effectiveness, I beggarly the adeptness to finer adeptness as advanced an admirers as accessible with bigger compression after sacrificing so abounding accessories on the chantry of “outdated tech” that we accomplish the new technology abortive in agreement of all-embracing admirers reach.
The counterargument actuality goes commodity like this: If the account of HEVC is alone for 4K or added alien types of video commitment (e.g., VR video, 360° video, etc.), again we absolutely aren’t sacrificing abounding devices, back the majority of those accessories could alone comedy 720p or 1080p content. Those who appetite to see 4K will buy a 4K-capable device, and those who appetite to see VR video will end up with a absolutely altered awning or anatomy factor.
There’s arete to this counterargument, but it starts from a worldview that may be somewhat myopic, one that says bigger compression requires added able-bodied accouterments for encoding and decoding.
As a counter-counterargument, accede the addition of the On2 VPx alternation of codecs from about a decade ago (with the banderole agitated on by Google in contempo years). Whether or not you admired the earlier On2 codecs (VP6, VP7, etc.), the worldview was actual different. Success was based on the adeptness to accretion bigger adeptness while at the aforementioned time absolutely blurred the bar for entry. In added words, accepting bigger compression and a greater cardinal of devices, rather than a abate cardinal of devices.
To me, this is area the addition befalling charcoal strong: For all those absolutely anatomic accessories that are actuality alone in the move to college adeptness compression in the anatomy of HEVC, there’s an befalling to accommodate bigger compression through AVC assets or alike alternating codecs like VP9 and AV1.
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The abutting few months will be a augury for the abutting decade of compression. If the efficiencies of AVC are not bigger for 720p and 1080p content, there’s a aerial likelihood that consumers will be affected into purchasing new phones, tablets, and computers aloof to accumulate up with the accouterments requirements of HEVC. And that would be a disservice to all parties.
[This commodity appears in the September 2017 affair of Streaming Media Magazine as "Effective or Efficient?"]
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