As H.265 grows in popularity, however, home users will start to use the new codec to reduce file sizes and decrease upload times. This is mostly a problem for companies producing content rather than one for consumers, at least for the time being. Higher efficiency usually comes with a cost: complexity. H.265 is far more difficult to encode as a result of its complexity, and can require up to 10 times the compute power to encode at the same speed as H.264. “At the constrained bitrates you might see on a typical PC,” says Tom Vaughan, “we can be up to twice as efficient as h.264.” How demanding is it? Greater efficiency means video can be shown at the same quality while consuming less bandwidth, or bandwidth can be maintained to achieve greater quality. Related: Could BPG be the successor to JPEG? If codec A and codec B both display the same image quality, but the size of A’s file is twenty percent smaller, then A is more efficient. The less data a codec can use to display an image without degrading its quality, the more efficient it is.

This leads to an inevitable question: If it’s been working for so long, and is compatible with virtually every device consumers own today, why replace it?Įfficiency is the answer.

It was finalized all the way back in 2003 and really started to catch on a few years later. H.264 is an incredibly popular codec that forms the basis of most online video shown today. It’s the most popular way to encode video to HEVC, but it’s not the only choice. The standard was defined by the Moving Picture Experts Group (MPEG) and the Video Coding Experts Group (VCEG), and each calls it by a different name, but the standard is the same.Īnd what about x265? That’s the open-source encoding project, not the standard. Each is a different name for the same codec. So, what’s the difference between H.265 and HEVC? There isn’t one. Video encoding isn’t defined by the standard.” This is why there are many different video encoders, and some are more efficient than others. “When you define a codec, the only thing really defined by the spec is the syntax of the compressed video stream, and the method to decode it. Tom Vaughan, the Vice President of product management and marketing at MultiCoreWare, developer of the open-source x265 encoder, clarified this. Interestingly, a video coding standard doesn’t define how video is encoded into a file. Is your 1440p monitor actually a downscaled 4K panel in disguise? TV: Why a TV could be your next gaming monitor

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