Nvidia PureVideo

As PureVideo HD Nvidia called an introduced with the GeForce 7 series video platform for the multimedia capabilities of Nvidia graphics cards to improve (quality and flexibility). PureVideo HD technology is used for hardware acceleration of video in standard commercial formats. The main processor so that, depending on the order which generation it is and in what format the video, removed the work in whole or in part.

First generation

PureVideo HD was introduced with GeForce 7 series. The graphics card could, for example, MPEG- 2, H.264 and WMV3/VC-1 process. In H.264 material, the last two stages of decoding could be taken. The first two decoding steps "Bitstream Processing" and "Inverse Transform" continues to play the main processor.

Second generation

PureVideo HD of the second generation can handle videos in MPEG -2, H.264 and WMV3/VC-1, thus relieving the main processor when playing these video formats. The built- in graphics chip video processor VP2 can take over the last three stages of the decoder HD H.264 and VC-1. The first decoder stage "Bitstream Processing" takes on H.264 is also integrated into the graphics chip bitstream processor ( BSP) for the other formats does the job continues to be the main processor.

The AES128 engine is also integrated into the graphics chip, which handles the decoding of the AES encryption protocol. This encryption protocol is used in many commercial HD DVDs and Blu -ray discs copy protection AACS.

Third generation

PureVideo HD third generation can continue to process video in MPEG -2, H.264 and WMV3/VC-1. In contrast to the previous generation, the first decoder stage "Bitstream Processing" for VC -1 and MPEG -2 material can now be taken so that these formats can be processed completely on the graphics processor.

Graphics chips to the third - generation PureVideo ( G98, MCP77, MCP78, MCP79, MCP7A ) have a bug that prevents the accelerated decoding of H.264 videos with the following horizontal resolutions: 769-784, 849-864, 929-944, 1009 - 1024, 1793-1808, 1873-1888, 1953-1968 and 2033-2048 pixels.

Fourth generation

With PureVideo HD the fourth generation a bitstream decoder for MPEG -4 Advanced Simple Profile (ASP ) which is part one, in addition to existing features added, which is a profile of MPEG- 4 Part 2 is to ISO standards, but without the support of Global motion compensation, this profile is. In addition, MVC is supported for the first time. The first graphics cards with PureVideo HD fourth generation ( sometimes abbreviated as VP4 ) were the Geforce G210 and G210 M.

Fifth generation

The fifth generation of PureVideo HD did not get a much more powerful decoder which supports in addition to the existing features in addition to a greatly increased speed and higher resolutions up to 4k, but under VDPAU. The first graphics card with PureVideo HD Fifth Generation ( sometimes abbreviated as VP5 ) was the Geforce GT 520

Software support

PureVideo HD technology provides Nvidia proprietary device drivers that support DXVA (for Windows) and VDPAU ( for Unix-like operating systems). Under Mac OS X the video Decode Acceleration Framework supports the decoding of H.264 from the third generation PureVideo. All programs that support these programming interfaces can take advantage of PureVideo HD.