HD-DVD Playback - On the Xbox 360 & on NVIDIA GPUs
by Derek Wilson & Manveer Wasson on December 15, 2006 9:21 AM EST- Posted in
- GPUs
HD-DVD Playback Performance
First we'll take a look at Serenity, our VC-1 title. This graph represents average CPU utilization over the course of video playback for about a minute. We ran each test 3 times and took the best score of the three. Runs were fairly consistent with the occasional anomaly that appeared to be an errant background process taking up CPU time.
These benchmarks show that, as with Blu-ray, the GeForce 8800 series come out way on top. CPU usage is reduced by quite a bit, and even the 7900 GTX and 7950 GT do a decent job. The rest of the pack is only marginally beneficial, but with the already low CPU utilization this VC-1 title displays, GPU acceleration isn't that necessary anyway. Differences in these slower cards could just be getting lost in the noise. Even without GPU acceleration, an E6300 is able to play Serenity without pegging the CPU.
With our H.264 title, we do see higher CPU utilization. This does approach the type of impact we saw on Blu-ray, but bitrates were more consistent on this HD-DVD title. We didn't see any real spikes above the average bitrate, and CPU utilization was pretty consistent over the course of the movie. Once again, the 8800s lead the way with the rest of the pack trailing off. With The Interpreter, our recommendations for CPU and GPU are back up to the level we saw with Blu-ray: buy fast hardware if planning on playing HD-DVDs on a PC.
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losthours - Saturday, December 16, 2006 - link
all i hear is how the ps3 is overpriced. but by the time you add the relative hardware to the xbox 360 you get the same price. so it looks like sony didn't dump you with a dvd drive you really didn't need and make you pay later. just a side note i'm note gonna buy either xbox or ps3 i'm gonna go with the wii if i buy one.nah - Saturday, December 16, 2006 - link
How about recording a video to HD-DVD/Blu-Ray and seeing CPU utilization ?artifex - Friday, December 15, 2006 - link
Thanks for the article!I haven't even read it, yet, but this is what I've been waiting for, since your earlier one. So thanks for getting it out so quickly!
Badkarma - Friday, December 15, 2006 - link
All I see these days are articles about video playback of HD-DVD/Bluray. How about the HD Audio formats like DD+, Dolby TrueHD, DTS-HD? All these HDCP video cards with HDMI don't have connectivity to pass the PCM output of the HD audio soundtracks like the CE devices do. When is this coming?DerekWilson - Sunday, December 17, 2006 - link
Actually, IIRC, all the HDMI cards we tested do have an audio input for pass through.Badkarma - Tuesday, December 19, 2006 - link
Derek. The audio passthrough seen on all current HDMI cards are SPDIF which can only carry regular Dolby Digital 5.1 and DTS. HD Audio formats go hand in hand with the two new HD formats, but NO ONE has addressed how the HD audio formats like Dolby TrueHD and DTS-HD will be handled on the computer. I've scoured the internet for more information, but there doesn't really seem to be anything to be found. Can you please look into this? You can output TrueHD/DTS-HD via analog outputs on your soundcard if you have them, however, for those of us that would like to apply room equilization to the audio are SOL. There is nothing at the moment available that will allow TrueHD/DTS-HD to be passed as PCM audio via HDMI like the Toshiba HD-A1/2 CE devices.
JarredWalton - Tuesday, December 19, 2006 - link
Does anything use TrueHD DTS-HD audio right now? I don't know, but if the audio on BRD and HD-DVD is only DD5.1 or DTS, then passing them as something HD won't improve quality. While I can see video truly benefiting from higher bitrates, I don't think audio really needs more than about a DVD's worth of storage tops before any improvements can't be heard. But anyway, I don't have an answer to your question and am merely curious as to what the benefits are. (I don't really think BRD/HDDVD are better than other alternatives, but it's what we're getting from MPAA/RIAA so consumers are stuck.)Badkarma - Tuesday, December 19, 2006 - link
Almost every single HD-DVD has at minimum Dolby Digital + which has a lot more bandwidth than DD5.1. There are quite a few HD-DVD's with TrueHD soundtracks. Unfortunately, a lot of consumers think like you, audio doesn't matter, 5.1 is enough. HD audio goes hand in hand with HD video. It's a complete package.artifex - Friday, December 15, 2006 - link
In the case of the XBOX360 HD-DVD player, most of these HD audio formats aren't available, anyway. They should probably mention this in the article.Renoir - Friday, December 15, 2006 - link
Very good question! I would also like to see more discussion/analysis on this situation