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<blockquote data-quote="knutinh" data-source="post: 166085" data-attributes="member: 14776">Of course, I was talking about physical formats like DVD and hard-drives.Still, you can have lipsync/framedrop/audio resample issues with streamed media, and having hardware-referenced clocks makes it a lot easier to cope with.-k<a href="http://www.anandtech.com/video/showdoc.aspx?i=3047" target="_blank">AnandTech: HD Video Decode Quality and Performance Summer '07</a>I think that anandtech is being unclear as to what card supports what, so I have tried to &quot;decode&quot; their text[code]Type acceleration&nbsp; &nbsp; &nbsp;&nbsp; | Bitstream&nbsp; | Inverse&nbsp;&nbsp; | Motion&nbsp; &nbsp; &nbsp;&nbsp; | Deblocking |&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; | processing | transform | compensation |&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; |ATI/AMD 2400/2600: h264 |&nbsp; &nbsp; yes&nbsp; &nbsp;&nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; &nbsp;&nbsp; |&nbsp; &nbsp;&nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; VC1&nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp;&nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; &nbsp;&nbsp; |&nbsp; &nbsp;&nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; MPEG2|&nbsp; &nbsp; yes&nbsp; &nbsp;&nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; &nbsp;&nbsp; |&nbsp; &nbsp;&nbsp; yes&nbsp; &nbsp; |ATI/AMD 2900:&nbsp; &nbsp; &nbsp; h264 |&nbsp; &nbsp;&nbsp; x&nbsp; &nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; &nbsp;&nbsp; |&nbsp; &nbsp;&nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; VC1&nbsp; |&nbsp; &nbsp;&nbsp; x&nbsp; &nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; &nbsp;&nbsp; |&nbsp; &nbsp;&nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; MPEG2|&nbsp; &nbsp;&nbsp; x&nbsp; &nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; &nbsp;&nbsp; |&nbsp; &nbsp;&nbsp; yes&nbsp; &nbsp; |Nvidia 8400/8600:&nbsp; h264 |&nbsp; &nbsp; yes&nbsp; &nbsp;&nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; &nbsp;&nbsp; |&nbsp; &nbsp;&nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; VC1&nbsp; |&nbsp; &nbsp;&nbsp; x&nbsp; &nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; &nbsp;&nbsp; |&nbsp; &nbsp;&nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; MPEG2|&nbsp; &nbsp;&nbsp; x&nbsp; &nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; &nbsp;&nbsp; |&nbsp; &nbsp;&nbsp; yes&nbsp; &nbsp; |Nvidia 8800/7-ser: h264 |&nbsp; &nbsp;&nbsp; x&nbsp; &nbsp; &nbsp; |&nbsp; &nbsp;&nbsp; x&nbsp; &nbsp;&nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; &nbsp;&nbsp; |&nbsp; &nbsp;&nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; VC1&nbsp; |&nbsp; &nbsp;&nbsp; x&nbsp; &nbsp; &nbsp; |&nbsp; &nbsp;&nbsp; x&nbsp; &nbsp;&nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; &nbsp;&nbsp; |&nbsp; &nbsp;&nbsp; yes&nbsp; &nbsp; |&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; MPEG2|&nbsp; &nbsp;&nbsp; x&nbsp; &nbsp; &nbsp; |&nbsp; &nbsp;&nbsp; ?&nbsp; &nbsp;&nbsp; |&nbsp; &nbsp; yes&nbsp; &nbsp; &nbsp;&nbsp; |&nbsp; &nbsp;&nbsp; yes&nbsp; &nbsp; |[/code]So the ATI mid-range GPUs is your only option for full CPU-offloading of all HD-DVD/BR video codecs. The Nvidia cards will give full offload only for h264 (thats the heaviest codec anywaysBoth ATI and Nvidia gives less offloading in their high-end GPUsIf you have got a &quot;slow&quot; cpu, you might want to factor this in. If you have a fast cpu, then GPU offloading of the MPEG2 standard may not be that important.HD HQV Image Quality Analysis[code]Silicon Optix HD HQV Scores &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; |Noise&nbsp; &nbsp;&nbsp; |Video&nbsp; &nbsp; |Jaggies |Film&nbsp; &nbsp;&nbsp; |Stadium |Total &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; |Reduction |Res Loss |&nbsp; &nbsp; &nbsp; &nbsp; |Res Loss |&nbsp; &nbsp; &nbsp; &nbsp; |AMD Radeon HD 2900 XT&nbsp;&nbsp; |15&nbsp; &nbsp; &nbsp; &nbsp; | 20&nbsp; &nbsp; &nbsp; |&nbsp; 20&nbsp; &nbsp; | 25&nbsp; &nbsp; &nbsp; | 10&nbsp; &nbsp;&nbsp; | 90 AMD Radeon HD 2600 XT&nbsp;&nbsp; |15&nbsp; &nbsp; &nbsp; &nbsp; | 20&nbsp; &nbsp; &nbsp; |&nbsp; 20&nbsp; &nbsp; | 25&nbsp; &nbsp; &nbsp; | 10&nbsp; &nbsp;&nbsp; | 90 AMD Radeon HD 2600 Pro&nbsp; |15&nbsp; &nbsp; &nbsp; &nbsp; | 20&nbsp; &nbsp; &nbsp; |&nbsp; 20&nbsp; &nbsp; | 25&nbsp; &nbsp; &nbsp; | 10&nbsp; &nbsp;&nbsp; | 90 AMD Radeon HD 2400 XT&nbsp;&nbsp; | 0&nbsp; &nbsp; &nbsp; &nbsp; | 20&nbsp; &nbsp; &nbsp; |&nbsp;&nbsp; 0&nbsp; &nbsp; | 25&nbsp; &nbsp; &nbsp; | 10&nbsp; &nbsp;&nbsp; | 55 NVIDIA GeForce 8800 GTX |25&nbsp; &nbsp; &nbsp; &nbsp; | 20&nbsp; &nbsp; &nbsp; |&nbsp; 20&nbsp; &nbsp; | 25&nbsp; &nbsp; &nbsp; | 10&nbsp; &nbsp;&nbsp; | 100 NVIDIA GeForce 8600 GTS |25&nbsp; &nbsp; &nbsp; &nbsp; | 20&nbsp; &nbsp; &nbsp; |&nbsp; 20&nbsp; &nbsp; | 25&nbsp; &nbsp; &nbsp; | 10&nbsp; &nbsp;&nbsp; | 100 NVIDIA GeForce 8600 GT&nbsp; |25&nbsp; &nbsp; &nbsp; &nbsp; | 20&nbsp; &nbsp; &nbsp; |&nbsp; 20&nbsp; &nbsp; | 25&nbsp; &nbsp; &nbsp; | 10&nbsp; &nbsp;&nbsp; | 100 [/code]Transporter 2 Trailer (High Bitrate H.264) Performance &quot;...This ~2 minute trailer is encoded with an average bitrate of 40 Mbps. The bitrate actually peaks at nearly 54 Mbps by our observation. This pushes up to the limit of H.264 bitrates allowed on Blu-ray movies, and serves as an excellent test for a decoder's ability to handle the full range of H.264 encoded content we could see on Blu-ray discs. &quot;<img src="http://images.anandtech.com/graphs/uvd%20versus%20purevideo%20hd_07230740716/15166.png" alt="" class="fr-fic fr-dii fr-draggable " style="" />Obviously, a pentium 4 560 gains a lot from using one of the midrange cards compared to the high-end GPUs for h264Serenity (VC-1) Performance <img src="http://images.anandtech.com/graphs/uvd%20versus%20purevideo%20hd_07230740716/15168.png" alt="" class="fr-fic fr-dii fr-draggable " style="" />When we switch to VC1 (still pentium 4), it is obvious that the&nbsp; ATI/AMD 2400/2600 with complete VC1 decode offloads more cpu than the&nbsp; Nvidia 8400/8600 with only partial decoding..I am surprised that&nbsp; Nvidia 8600 and 8800 has about equal performance for VC1, since the first has IDCT, the latter dont<a href="http://www.anandtech.com/video/showdoc.aspx?i=3047" target="_blank">AnandTech: HD Video Decode Quality and Performance Summer '07</a><a href="http://www.anandtech.com/video/showdoc.aspx?i=3000" target="_blank">AnandTech: AMD's UVD Debacle</a><a href="http://anandtech.com/video/showdoc.aspx?i=2977" target="_blank">AnandTech: NVIDIA GeForce 8600: Full H.264 Decode Acceleration</a><a href="http://www.nvidia.com/docs/CP/11036/PureVideo_Product_Comparison.pdf" target="_blank">http://www.nvidia.com/docs/CP/11036/PureVideo_Product_Comparison.pdf</a><a href="http://ati.amd.com/products/radeonhd2900/specs.html" target="_blank">ATI Radeon™ HD 2900 Series - GPU Specifications</a><a href="http://ati.amd.com/products/radeonhd2600/specs.html" target="_blank">ATI Radeon™ HD 2600 Series - GPU Specifications</a></blockquote>

[QUOTE="knutinh, post: 166085, member: 14776"] Of course, I was talking about physical formats like DVD and hard-drives. Still, you can have lipsync/framedrop/audio resample issues with streamed media, and having hardware-referenced clocks makes it a lot easier to cope with. -k [url=http://www.anandtech.com/video/showdoc.aspx?i=3047]AnandTech: HD Video Decode Quality and Performance Summer '07[/url] I think that anandtech is being unclear as to what card supports what, so I have tried to "decode" their text[code] Type acceleration | Bitstream | Inverse | Motion | Deblocking | | processing | transform | compensation | | ATI/AMD 2400/2600: h264 | yes | yes | yes | yes | VC1 | yes | yes | yes | yes | MPEG2| yes | yes | yes | yes | ATI/AMD 2900: h264 | x | yes | yes | yes | VC1 | x | yes | yes | yes | MPEG2| x | yes | yes | yes | Nvidia 8400/8600: h264 | yes | yes | yes | yes | VC1 | x | yes | yes | yes | MPEG2| x | yes | yes | yes | Nvidia 8800/7-ser: h264 | x | x | yes | yes | VC1 | x | x | yes | yes | MPEG2| x | ? | yes | yes | [/code] So the ATI mid-range GPUs is your only option for full CPU-offloading of all HD-DVD/BR video codecs. The Nvidia cards will give full offload only for h264 (thats the heaviest codec anyways Both ATI and Nvidia gives less offloading in their high-end GPUs If you have got a "slow" cpu, you might want to factor this in. If you have a fast cpu, then GPU offloading of the MPEG2 standard may not be that important. [b]HD HQV Image Quality Analysis[/b] [code] Silicon Optix HD HQV Scores |Noise |Video |Jaggies |Film |Stadium |Total |Reduction |Res Loss | |Res Loss | | AMD Radeon HD 2900 XT |15 | 20 | 20 | 25 | 10 | 90 AMD Radeon HD 2600 XT |15 | 20 | 20 | 25 | 10 | 90 AMD Radeon HD 2600 Pro |15 | 20 | 20 | 25 | 10 | 90 AMD Radeon HD 2400 XT | 0 | 20 | 0 | 25 | 10 | 55 NVIDIA GeForce 8800 GTX |25 | 20 | 20 | 25 | 10 | 100 NVIDIA GeForce 8600 GTS |25 | 20 | 20 | 25 | 10 | 100 NVIDIA GeForce 8600 GT |25 | 20 | 20 | 25 | 10 | 100 [/code] [b]Transporter 2 Trailer (High Bitrate H.264) Performance [/b] "...This ~2 minute trailer is encoded with an average bitrate of 40 Mbps. The bitrate actually peaks at nearly 54 Mbps by our observation. This pushes up to the limit of H.264 bitrates allowed on Blu-ray movies, and serves as an excellent test for a decoder's ability to handle the full range of H.264 encoded content we could see on Blu-ray discs. " [img]http://images.anandtech.com/graphs/uvd%20versus%20purevideo%20hd_07230740716/15166.png[/img] Obviously, a pentium 4 560 gains a lot from using one of the midrange cards compared to the high-end GPUs for h264 [b]Serenity (VC-1) Performance [/b] [img]http://images.anandtech.com/graphs/uvd%20versus%20purevideo%20hd_07230740716/15168.png[/img] When we switch to VC1 (still pentium 4), it is obvious that the ATI/AMD 2400/2600 with complete VC1 decode offloads more cpu than the Nvidia 8400/8600 with only partial decoding.. I am surprised that Nvidia 8600 and 8800 has about equal performance for VC1, since the first has IDCT, the latter dont [url=http://www.anandtech.com/video/showdoc.aspx?i=3047]AnandTech: HD Video Decode Quality and Performance Summer '07[/url] [url=http://www.anandtech.com/video/showdoc.aspx?i=3000]AnandTech: AMD's UVD Debacle[/url] [url=http://anandtech.com/video/showdoc.aspx?i=2977]AnandTech: NVIDIA GeForce 8600: Full H.264 Decode Acceleration[/url] [url]http://www.nvidia.com/docs/CP/11036/PureVideo_Product_Comparison.pdf[/url] [url=http://ati.amd.com/products/radeonhd2900/specs.html]ATI Radeon™ HD 2900 Series - GPU Specifications[/url] [url=http://ati.amd.com/products/radeonhd2600/specs.html]ATI Radeon™ HD 2600 Series - GPU Specifications[/url] [/QUOTE]

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