On Feb 25, 7:57 am, zhangfx <zhan...@lemote.com> wrote:
> It is hard to be accurate on such issue. Roughly in my experience > Fuloong with 800Mhz loongson 2F with SIMD optimized code can > support a smooth decode of 720p mpeg2. H264 is more complex. okaay, soo... let's go with MPEG2, first... multiply up. 1080p is 2.25x more pixels than 720p. so, roughly you would need 800*2.25 mhz - that's 1800mhz - to do 1080p MPEG2. let's assume you meant 720p30. what that means is that a quad-core 1ghz Loongson 3A would require only 45% utilisation to do MPEG2 (1800/4000). which is pretty damn good. in 28nm, (assuming same clock rate, 1ghz), power consumption would be 4x less (than the 15 watts used by Loongson 3A) which is ouch still 3.75 watts! (ok, that's at 100% but still...) hmmm .... :) thank you for that, zhang. does anyone have a reasonable / approximate handle on the CPU utilisation difference between MPEG-2 and H.264? i started searching - i miight find something myself over the next couple of days, too. l. -- You received this message because you are subscribed to the Google Groups "loongson-dev" group. To post to this group, send email to loongson-dev@googlegroups.com. To unsubscribe from this group, send email to loongson-dev+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/loongson-dev?hl=en.
