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<blockquote data-quote="globaldonkey" data-source="post: 700810" data-attributes="member: 49844"><p>VA (Vector Adaptive) de-interlacing is the term ATI uses to describe the best quality de-interlacing they implement. Interlaced content (1080i) requires de-interlacing and the process of de-interlacing is one of the more CPU/GPU intensive processes, and usually pushes most low end GPU's to the limit (or over it). 1080p is much less GPU/CPU intensive. This is why I always question the marketing hype around "smooth 1080p playback" that GPU and iGPU makers like to push. The real hype should be around smooth 1080i playback.</p><p></p><p>Here is an example of a good analysis based on HTPC requirements.</p><p></p><p><a href="http://www.anandtech.com/Show/Index/3601?cPage=5&all=False&sort=0&page=1&slug=the-final-word-on-the-best-radeon-htpc-card" target="_blank">The Final Word on the Best Radeon HTPC Card - AnandTech :: Your Source for Hardware Analysis and News</a></p><p></p><p>The 5450 is only just able to handle 1080i playback. Turn on any other post processing, and it starts to drop frames. The 5570 has enough grunt to do it all. I think there may be similar performance difference between the Nvidia 220 / 240 and the 430. It's really hard to find articles that benchmark GPU's for HTPC properly, and fully test 1080i playback. Most articles focus on 1080p playback and benchmarking for gaming.</p><p></p><p>You also need to consider h.264 vs MPEG 2. H.264 takes a lot more grunt to decode than MPEG 2. So h.264 + 1080i is the peak performance requirement of a HTPC. </p><p></p><p>All of this discussion assumes the use of a DXVA (GPU accelerated codec), and of course, codec choice can make a big difference to results as well. Turning on DXVA on a low end GPU vs using CoreAVC (without CUDA - no acceleration) will move de-interlacing and decoding from hardware accelerated to software based based (CPU), and CoreAVC is one of the better software based h.264 decoders. So if you don't mind running your CPU hot and not using your GPU, you can still achieve good results on a low end GPU. When people tell you they have 1080i working ok on their low end GPU, you need to check that they are using DXVA or CUDA too (eg ffdshow DXVA, MPC-HC etc). No point spending $80 on a video card if your CPU is going to do all the work.</p></blockquote><p></p>
[QUOTE="globaldonkey, post: 700810, member: 49844"] VA (Vector Adaptive) de-interlacing is the term ATI uses to describe the best quality de-interlacing they implement. Interlaced content (1080i) requires de-interlacing and the process of de-interlacing is one of the more CPU/GPU intensive processes, and usually pushes most low end GPU's to the limit (or over it). 1080p is much less GPU/CPU intensive. This is why I always question the marketing hype around "smooth 1080p playback" that GPU and iGPU makers like to push. The real hype should be around smooth 1080i playback. Here is an example of a good analysis based on HTPC requirements. [url=http://www.anandtech.com/Show/Index/3601?cPage=5&all=False&sort=0&page=1&slug=the-final-word-on-the-best-radeon-htpc-card]The Final Word on the Best Radeon HTPC Card - AnandTech :: Your Source for Hardware Analysis and News[/url] The 5450 is only just able to handle 1080i playback. Turn on any other post processing, and it starts to drop frames. The 5570 has enough grunt to do it all. I think there may be similar performance difference between the Nvidia 220 / 240 and the 430. It's really hard to find articles that benchmark GPU's for HTPC properly, and fully test 1080i playback. Most articles focus on 1080p playback and benchmarking for gaming. You also need to consider h.264 vs MPEG 2. H.264 takes a lot more grunt to decode than MPEG 2. So h.264 + 1080i is the peak performance requirement of a HTPC. All of this discussion assumes the use of a DXVA (GPU accelerated codec), and of course, codec choice can make a big difference to results as well. Turning on DXVA on a low end GPU vs using CoreAVC (without CUDA - no acceleration) will move de-interlacing and decoding from hardware accelerated to software based based (CPU), and CoreAVC is one of the better software based h.264 decoders. So if you don't mind running your CPU hot and not using your GPU, you can still achieve good results on a low end GPU. When people tell you they have 1080i working ok on their low end GPU, you need to check that they are using DXVA or CUDA too (eg ffdshow DXVA, MPC-HC etc). No point spending $80 on a video card if your CPU is going to do all the work. [/QUOTE]
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