H.265/HEVC标准将不久之后到来

High Efficiency Video Coding (HEVC) or H.265 is a new video compression standard that is being developed by a Joint Collaborative Team of ISO/IEC MPEG and ITU-T VCEG (JCT-VC) for a while already as the successor of the currently very widely adopted H.264 (AVC) standard. The H.265/HEVC has now entered in its final standardization stage and is probably going to be fully approved as a standard very soon, though it will take a while before it becomes widely available in all kinds of devices as the H.264 already is. The final Draft 10 has been presented a few days ago and had received first stage approval (consent) in the ITU-T Alternative Approval Process, so it can be just a month away from getting approved, and a the same time MPEG also announced that HEVC is entering their Final Draft International Standard (FDIS) status which can take two months to have it approved as an International Standard. And if you are wondering why it is important to have the successor of the H.264 standard approved and getting implemented in both software and hardware sooner than later, then you need to think about things such as 4K HDTVs (the standard supports up to 8K), HFR 3D (HEVC will support higher framerates) and other new technologies and products that are going to have more demands in terms of video resolution and storage/bandwidth requirements.

高效视频编码（HEVC）或H.265在过去的一段时间里是由ISO / IEC MPEG和ITU-T的VCEG（JCT-VC）的联合协作小组共同开发，作为目前非常广泛采用H.264（AVC）标准下一代标准，已经被认为是一个成功的新的视频压缩标准。目前H.265 / HEVC已进入最后阶段，该标准很可能将完全作为一个标准很快获得批准，但它成为所有类型的设备作为H.264已经广泛使用之前，将需要一段时间是。最终草案10已经在几天前提交，又获得了ITU-T替代批准程序第一阶段批准（同意），短短一个月内获得批准，并且同时MPEG还宣布， HEVC正在进入他们的最终草案国际标准（FDIS），这可能需要两个月的时间来把它批准为国际标准的地位。如果你想知道为什么有批准并在软件和硬件得到落实迟早H.264标准的继任者是很重要的，那么你需要考虑的事情，如高清电视4K（标准高达8K支持），3D HFR（HEVC将支持更高的帧率）等新技术和将不得不在视频分辨率和存储/带宽需求方面更多的需求的产品。

The original idea behind the HEVC is to improve the compression efficiency by a factor of at least two compared to the H.264/AVC compression standard for the same content retaining the same quality and though that goal might not be achieved in all conditions, the results demonstrated from the not yet fully finalized new HEVC compression standard are very promising. Of course the reduction of the bitrate requirements while retaining the same level of quality can only be achieved by increasing the complexity of the algorithms used for the compression and decompression of the video. This means slight increase in the time needed to compress HEVC/H.265 video as compared to H.264, but the decoding process is what will be more performance demanding, especially when going for higher resolutions than 1080p. Of course we are probably going to be getting hardware acceleration for encoding/decoding as well as dedicated hardware made to handle the extra load in devices such as HDTVs.

该HEVC背后的本意是改善相比对于相同的内容保持相同的质量和H.264 / AVC压缩标准中的至少两个因子的压缩效率尽管这目标可能并非在所有的条件来实现，所述从尚未完全敲定新的HEVC压缩标准证明结果是非常有前途的。当然，同时保留相同的质量水平的比特率要求的降低，只能通过增加的用于视频的压缩和解压算法的复杂性来实现。这意味着在压缩HEVC/ H.265视频相比H.264作为所需的时间略有增加，但在解码过程去为大于1080更高的分辨率时什么会更性能要求高，尤其是。当然，我们很可能会越来越编码/解码的硬件加速，以及作出处理设备的额外负载，如高清电视专用硬件。

Now, you may be wondering how is H.265/HEVC going to be important for you in regards to stereoscopic 3D video support. Unfortunately the current Draft 10 does not cover stereoscopic 3D support, though such is going to be available via extensions of HEVC in order for it so also fully support stereoscopic 3D as well as multiview video and other more advanced features such as 12-bit video as well as 4:2:2 and 4:4:4 chroma formats, but we may have to wait until January next year for these extensions to become available. That should not worry you as you are not going to see H.265 available everywhere overnight, it is a process that will take a few years and meanwhile H.264 will most likely remain as the standard, the speed of adoption depends a lot on the industry and how soon H.264 will start hitting its limits a lot, so that the adoption of the successor may be speeded up. But for now we are still at least a month or two before the H.265/HEVC gets its final approval.

现在，你可能想知道H.265/ HEVC是如何将是对你很重要的问候立体3D视频的支持。不幸的是，目前的草案10不包括立体3D的支持，尽管这种是为了将可通过HEVC的扩展它，也完全支持立体3D，以及多视点视频等更先进的功能，如12位视频作为以及4：2：2和4：4：4色度格式，但我们可能要等到明年一月这些扩展变得可用。这不应该担心你，你都不会看到随处可得一夜H.265，这是一个过程，将需要数年，同时H.264将最有可能保持为标准，采用的速度取决于很多的工业和如何尽快将H.264击中开始它的极限了很多，所以，通过该继任者可能会加快。但现在我们仍然至少有一两个月的H.265/ HEVC获得最终的批准。

Now you can find a lot of similarities here between the H.264 and the upcoming H.265 standard and that is normal as the new one builds on top of the old one and further improves on some features as well as adds new ones. And similar to how the Multiview Video Coding (MVC) extension of the H.264/AVC standard was added as a means to ensure high-quality and resolution 3D video over a medium such as Blu-ray 3D, the upcoming H.265/HEVC will have a similar extension using the Multiview Video plus Depth (MVD) format. The new MVD format is going to be addressing one of the drawbacks that MVC has and that is to be able to provide multiview data for display on autostereoscopic 3D displays in a standardized way without having to increase that much the bit rate required for encoding the additional views. The 3D HEVC extension has been proposed to MPEG and VCEG and was chosen as the starting point for the development of an HEVC-based 3D video coding standard, but as already mentioned this will take some more time. The idea behind the H.265/HEVC and the 3D HEVC extensions relying on MVD is to ensure that the new video compression standard will be future-proof, so it will not only provide features that we are starting to get the need for at the moment, but also support for features that might be required in a few years from now.

现在，你可以在这里的H.264和即将到来的H.265标准之间找到很多相似的地方，这是正常的，因为在新的基础上旧的顶部，并进一步提高了一些功能，以及添加了新的。而类似于如何多视点视频编码（MVC）扩展了H.264 / AVC标准的加入，以保证高品质和分辨率的3D视频在诸如蓝光3D，即将到来的H.265 /媒介手段HEVC将具有使用多视点视频加深度（MVD）的格式类似的扩展。新MVD格式将被寻址MVC有，那就是要能够对以标准化的方式自动立体3D显示器显示提供多视点数据，而不必增加很多用于编码额外所需的比特率的缺点之一意见。三维HEVC分机已经提出MPEG和VEG和被选为起始点为基于HEVC-3D视频编码标准的发展，但如已经提到的，这将需要更多的时间。在H.265 / HEVC和3D HEVC扩展依靠MVD背后的想法是，以确保新的视频压缩标准将是面向未来的，所以它不仅能提供，我们开始得到需要的特征时刻，但也为可能在几年需要从现在特征的支持。