[Arm-netbook] Libre RISC-V SoC

Luke Kenneth Casson Leighton lkcl at lkcl.net
Tue Jan 23 12:45:07 GMT 2018

On Tue, Jan 23, 2018 at 12:23 PM, Bill Kontos <vkontogpls at gmail.com> wrote:

> On Mon, Jan 22, 2018 at 11:12 PM, Luke Kenneth Casson Leighton
> <lkcl at lkcl.net> wrote:
>>  ... you mean like this?
>>  https://opencores.org/project,video_systems
> Yes, maybe with the adition of hevc. That would be ideal.

 do you happen to know if the building blocks - the key high-cpu-load
parts - of HEVC (aka H.265) _happen_ to be the same or near-identical
to MPEG or H.264 and so on?

 also critical will be a YUV->RGB converter plus scaler... and oh
look! https://opencores.org/project,video_stream_scaler

 if anyone remembers the National Semi Geode LX800 (bought by AMD),
that, staggeringly, could actually do 720p video displayed on
1600x1200 (with a bit of a tear at times), and could easily do
1280x720 (without tearing) @ 30fps.... *ENTIRELY IN SOFTWARE*...
because it had a YUV->RGB converter hard macro that took care of the
most expensive bit.

 ... and that was a 500mhz 486 with DDR2 RAM!  absolutely incredible.

so, anyway, yes: each little piece of the puzzle will be needed,
saving big chunks of CPU cycles.


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