Sunday, October 19, 2008

新Macbook/Pro/Air,H.264ハードデコーダ搭載か?

macrumors:Apple Enabled GPU Hardware Decoding of h.264 on New MacBooks, Pros and Airs?
Saturday October 18, 2008 01:41 AM EST; Category: MacBook Pro, MacBook
Written by Arnold Kim

MGLXPフォーラムのユーザが,あることに気がついた.
Appleの1080pのHD映画予告を再生すると,新しいアルミMacbookではCPU使用率28%だったのに対し,
旧Macbook Proでは100%だった.
どちらのMacも同じCPU速度だが,新MacbookはNVIDIA 9400Mを搭載している.
旧Macbook ProはNVIDIA 8600M GTだ.

Tonight, forum user MGLXP noticed that playback of 1080p high definition trailers from Apple took far less CPU time on his new aluminum MacBook (28% CPU) as compared to his old MacBook Pro (100% CPU). Both computers shared the same CPU speed, but the new MacBook includes the NVIDIA 9400M integrated graphics chipset, while the old MacBook Pro uses the NVIDIA 8600M GT.

これらから,新しいNVIDIAチップセットを搭載したMacBook,MacBook Pro,MacBook AirのMacOSXのバージョンは,
最初のh.264GPUデコーディングをしていると予想される.
Appleは過去にもNVIDIA 8600M GTなどでのh.264ハードデコードを出しているが,
良い結果は出せていなかった.

This suggests that the version of Mac OS X on newly released MacBooks, MacBook Pros and MacBook Airs based on the new NVIDIA chipsets now offers GPU-accelerated h.264 video decoding for the first time. While Apple has previously included graphics cards (such as the NVIDIA 8600M GT) that have contained hardware support for h.264 decoding, the company has apparently not previously taken advantage of it.

読者によれば,新Macbook, Macbook Proで動画特性が証明され,
マシンによって動画の見え方が違っていた.
新Macbook Airはまだ出荷されていないが,
新Macbook同じチップセットのため,同じ機能をもっていると予想される.

Multiple readers have confirmed similar findings on their new MacBooks and MacBook Pros, though it appears it can be movie-specific, as one video showed little difference between the machines. We assume the new MacBook Air would share the same advantage as it is based on the same graphics chipset as the new MacBook, though we haven't heard from an Air owner yet.

これらは,Snow Leopardに加えられるだろう.
Appleは過去にSnow Leopardに加わる「Quick Time X」を発表しており.
それはメディア再生を強化しているものだ.
OS X iPhoneのメディア再生テクノロジ,Snow LeopardのQuickTime X搭載は,
現代の音楽,動画フォーマットをサポートし,素晴らしい再生機能をもたらす.

These changes could be based on improvements planned for Snow Leopard. Apple had previously announced that "QuickTime X" would be a feature in Snow Leopard to offer optimized media playback:
Using media technology pioneered in OS X iPhone™, Snow Leopard introduces QuickTime X, which optimizes support for modern audio and video formats resulting in extremely efficient media playback.

読者は,Appleの公式発表なしで気がついた.
CPU使用率を見ただけでだ.
これが本当であったならば,ハードデコードが可能なチップセットを搭載している昔のMacもサポートして欲しい.

Readers should be reminded that without official confirmation from Apple, we are only speculating as to the reason behind the CPU usage difference. If true, however, we would hope that Apple would incorporate support for older Macs that have the necessary hardware in a future software update.


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