The internet as we know it today would not be as fun if not for the video. Videos of cats, singing not as tuned s and infectious dances would not be part of our day to day online, besides those increasingly faster connections, compression formats not both have evolved over recent years. While the research centers in telecommunications care to create these increasingly fast networks, other groups working to make the most efficient video compression, seeking better image quality using fewer bits.
H.264 is the name of the more advanced format, versatile and adopted in the market to date. Designed to be used in mobile phones to high-definition TVs, this format is already receiving his successor: the H.265 or HEVC (High Efficiency Video Coding). It has been closed by the Moving Pictures Experts Group ( the group that defines compression standards and streaming audio and video, known for MPEG acronym that lends name to several other digital media formats) and was approved by ITU (the UN agency that coordinates telecommunications ) the official standard.
The H.265 allows the same image quality that a file encoded in H.264 provides using 35% fewer bytes. An economy that pleases many markets, telecom operators to pay-TV operators. And to you, to have more free space on your computer or tablet.
Under the hood
One of the advances for improved compression H.265 was the replacement of macroblock used in developed by MPEG formats today for a smarter version. Currently we have a frame (we use that old word to avoid confusion in the sentence) image divided into blocks that, in turn, is divided into smaller blocks, to identify repetitions or similar colors in these regions and eliminating redundancies. A clear sky, all blue, do not need much detail, since the same color pixels are repeated over and over again.
H.265 in these blocks also exist, but they were smarter: no longer have fixed sizes and can be higher in some detailed areas and lower in more detailed areas, saving many bytes.
The new standard also adds several other improvements such as new techniques and directions for motion prediction, duplication detection, and other improvements of technologies that preceded it.
Ok, and what do I get it?
H.264 is already part of the daily lives of those who live in a multimedia world, the mobile phones, the streaming services, YouTube, on cable television. The creation of H.265 is good news for all of these markets due to the bandwidth savings that it will provide. Elementary mainly to define the commercial viability of the form 4k, which begins to appear on the horizon. The H.265 already have defined profiles adapted use for it, and the band economy will be very important for the transmission of video at this resolution in any medium: cable, satellite or IP networks.
there are problems
One problem is that the more sophisticated compression techniques is, the greater the processing power required to encode or decode this material, which may be the straw for many systems working at the limit.
In many cases, the graphics hardware is that it assumes that task to alleviate the work of the main processor, as sometimes happens in mobile devices. This raises another problem: for being late, the H.265 for now will not have compatible hardware on the market.
This lack of hardware is what will determine the time of the adoption of the format in surveillance systems, IPTVs and pay TV. But it has everything to inherit the “empire” of its predecessor and expand it. Who knows – does not hurt to dream, is not it? – Do not solve once the mess of formats for HTML5?