Yeah, because of the ASICs built into them to enable that decoding.
Without that, a 4K HEVC video is in upwards of 100+ billion operations/s to decode on the CPU. Which limits you to high end CPUs getting capped out on something you essentially get for “free” otherwise
Can’t current CPUs decode it in real time?
Yeah, because of the ASICs built into them to enable that decoding.
Without that, a 4K HEVC video is in upwards of 100+ billion operations/s to decode on the CPU. Which limits you to high end CPUs getting capped out on something you essentially get for “free” otherwise
I meant without dedicated circuits, obviously. Can’t it be parallelised? Many cpus have a lot of relatively idle cores at a given time…
I remember that my 486 had trouble with mp3 files, but soon enough, I got a new machine with many more spare cycles.
That is parallelized… I didn’t make mention of threading being the concern here.
The 100+ billion operations per second isn’t exactly easy.
4k 60fps = 498 million pixels per second
Each pixel takes a couple hundred logical operations with HEVC.
A modern high end 4GHz, 8 physical core CPU at 4 instructions per cycle, at maximum capacity, can handle 128 billion operations per second.
You probably wouldn’t even get your realtime framerate in this scenario.