Posted by: Nathan Simon
One of the biggest things to take up the bandwidth in the world is video, we have come quite a way since the good ole mpeg/avi original days of Windows 95 (remember that Weezer Video “Buddy Holly”)?
One of the latest video codec that people use is h.264, but that is just the beginning.
In comes h.265(High Efficiency Video Coding (HEVC)) the next iteration of video codec, at an apparent 2x data compression, fully supports 1080p, 4K and 8K UHD (yes I said 8K : 8192×4320) Considering 4k TV are just starting to get out there, we definitely need this codec!
HEVC benefits from the use of larger Coding Tree Block (CTB) sizes. This has been shown in PSNR tests with a HM-8.0 HEVC encoder where it was forced to use progressively smaller CTB sizes. For all test sequences when compared to a 64×64 CTB size it was shown that the HEVC bitrate increased by 2.2% when forced to use a 32×32 CTB size and increased by 11.0% when forced to use a 16×16 CTB size. In the Class A test sequences, where the resolution of the video was 2560×1600, when compared to a 64×64 CTB size it was shown that the HEVC bitrate increased by 5.7% when forced to use a 32×32 CTB size and increased by 28.2% when forced to use a 16×16 CTB size. The tests showed that large CTB sizes become even more important for coding efficiency with higher resolution video. The tests also showed that it took 60% longer to decode HEVC video encoded at 16×16 CTB size than at 64×64 CTB size. The tests showed that large CTB sizes increase coding efficiency while also reducing decoding time.
This is definitely going to help with mobile streaming, Youtube.com, Vevo.com, TV stations, satellite providers, and the list goes on! I am pretty excited to see this codec in action.
I first heard about this from The Register, click here to read more.