Blu-ray In Laptops Could Be Hard On Batteries 202
damienhunter notes a Wired story on the power-hungry ways of the first generation of Blu-ray players coming soon to a laptop near you. "With the Sony-backed HD format emerging victorious from a two-year showdown with Toshiba's HD DVD, many laptop manufacturers are now scrambling to add Blu-ray drives in their desktop and notebook lineups. Next month, Dell will even introduce a sub-$1,000 Blu-ray notebook... But the promise of viewing an increasing variety of HD movies on your laptop may be overshadowed by ongoing concerns over the technology's vampiric effect on battery life. Indeed, if the first generation of Blu-ray equipped laptops are any indication, you might not get more than halfway through that movie before running out of juice completely, analysts say."
Comment removed (Score:5, Informative)
Re:Better batteries? (Score:3, Informative)
Re:Problem solved.. (Score:5, Informative)
Except the main consumer of power is maxing out the CPU to do the highdef H.264 decoding in real time.
Words cannot adequately describe how idiotic that statement is... Divx is MPEG-4 ASP, much older and less advanced than H.264/MPEG-4 AVC, which is the primary codec used to encode highdef discs.
How in the world you're expecting to use an OLD codec to reencode a video stored in a NEW codec, to reduce the file-size of a video by a factor of 5, while NOT losing HUGE amounts of picture quality, is vastly beyond my comprehension.
Re:Problem solved.. (Score:3, Informative)
This problem is not limited to illuminating the laser.
Re:Was HD-DVD substantially different? (Score:2, Informative)
Re:Problem solved.. (Score:4, Informative)
Case in point, I have a couple of projects I've done with DVD footage. The DivX/XviD version comes to about 95mb. The exact same thing encoded in h.264 at the exact same quality (720x480) clocks in at about 45mb. If I kept the same filesize, I could scale it up to 1280x720 easily (would look like ass since the source isn't that high to begin with, but you see the point). There is no way you could take a high-def movie and compress it to 8gb in DivX without sacrificing quality.
The only win you're going to get with this route is saving power due to decreased CPU usage. Rendering h.264 video in realtime is notoriously taxing on CPU's, ESPECIALLY at HD resolutions. But if you drop the quality, you lose the entire point of having a high-def copy in the first place.
And to the people talking about the lasers eating up power, yes they do. To an extent. Along with maxing out the CPU, the biggest drain on the battery is the drive itself. It's a moving part. It spins. ANY optical drive when in constant use is going to drain the battery a lot faster than just sitting idle or reading a few files every couple of minutes.
Re:Problem solved.. (Score:5, Informative)
I happen to be a professional, and I know of NO such codecs. Not one.
DRM, metadata, and streaming are completely and totally independent of the underlying video and audio codecs.
Some people are very happy with vinyl records. Some people are legally blind. That does not change the facts.
I will ignore the rest of your purely trolling comment.
Re:Usual story (Score:3, Informative)
Re:Does anyone know? (Score:3, Informative)
Reading does require less power than writing, but the power requirements are also related to read speed. So the laser on a 12x DVD reader needs to be higher power than one on a 1x DVD reader. Similar for Blu-ray.
Re:And melted discs, no doubt... (Score:3, Informative)
I agree - that's a misleading and idiotic quote from the analyst.
Older 1GHz laptop CPUs use about 10W, while newer CPUs that you would probably want for higher end graphics capability are 30W or more (that's only the CPU not counting the GPU). A laser diode is about 5mW for reading and on the order of 200mW for burning. As far as I can tell there is no real power requirement difference between Blu-Ray and a high speed DVD RW drive.
And laser power is definitely not the major driver in laptop battery life - the big power draws are the CPU, large LCD panels and WiFi.
Re:Is it the CPU power needed for the DRM? (Score:3, Informative)
Re:Problem solved.. (Score:2, Informative)
Re:Problem solved.. (Score:5, Informative)