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Encyclopedia > Unified Video Decoder

The Unified Video Decoder, previously called "Universal Video Decoder", or UVD in short, is the video decoding unit from ATI Technologies to support hardware decode of H.264 and VC-1 video codec standards, and being a part of AVIVO HD technology. The existence of UVD was reported by a Hong Kong computer website HKEPC hardware [1] with leaked presentation slides [2]. “ATI” redirects here. ... H.264 is a standard for video compression. ... VC-1 is the informal name of the SMPTE 421M video codec standard initially developed by Microsoft. ... A video codec is a device or software that enables video compression and or decompression for digital video. ... AVIVO is a video platform ATI first introduced with its R520-based line of GPUs. ...

Contents

Features

The UVD is based on an ATI Xilleon video processor, incorporated into the same die of the GPU and part of the AVIVO HD for hardware decoding videos, along with the Advanced Video Processor (AVP). The UVD, as stated by ATI, handles decoding of H.264/AVC, and VC-1 video codecs almost entirely in hardware. The decoder meets the performance and profile requirements of Blu-ray and HD-DVD, decoding H.264 bitstreams up to a bitrate of 40 Mbit/s. It has context-adaptive binary arithmetic coding (CABAC) support and dual-stream decoding support, which would make picture-in-picture possible. Xilleon chip internal layout The ATI Xilleon video processor is a 32-bit system-on-a-chip MIPS processor, for use in set-top boxes and digital TVs, providing MPEG2 decoding and other functions for major worldwide broadcast networks (including PAL, NTSC, SECAM and ATSC). ... “GPU” redirects here. ... AVIVO is a video platform ATI first introduced with its R520-based line of GPUs. ... A blank rewritable Blu-ray disc (a BD-RE) A Blu-ray Disc (also called BD) is a high-density optical disc format for the storage of digital information, including high-definition video. ... HD DVD or High-Definition DVD is a high-density optical disc format designed for the storage of data and high-definition video. ... In telecommunications and computing, bitrate (sometimes written bit rate, data rate or as a variable Rbit) is the number of bits that are conveyed or processed per unit of time. ... Context-adaptive binary arithmetic coding (CABAC) is a form of entropy coding used in H.264/MPEG-4 AVC video encoding. ... Picture in Picture (PIP) allows you to watch more than one TV program(channel) at the same time on television sets or other devices. ...


Unlike video acceleration blocks in previous generation GPUs, UVD offloads almost the entire video-decoder process for VC-1 and H.264, requiring minimal host (CPU) attention. For example, neither ATI Radeon R520 series' AVIVO nor NVidia Geforce 7 series' PureVideo assist front-end bitstream/entropy decompression in VC-1 and H.264 - the host CPU performs this work[3]. In addition to handling VLC/CAVLC/CABAC, frequency transform, pixel prediction and inloop deblocking, UVD also contains an advanced video post-processing block. Post-processing includes denoising, deinterlacing, and scaling/resizing. AMD has also stated that the UVD component being corporated into the GPU core only occupies 4.7 mm² in area on 65 nm fabrication process node. ATIs R520 core (codenamed Fudo) is the foundation for a line of DirectX 9. ... AVIVO is a video platform ATI first introduced with its R520-based line of GPUs. ... NVIDIAs PureVideo is an MPEG-2 decoder designed to offload MPEG-2 decoding work from the CPU and software to NVIDIAs GPU series GeForce 6, GeForce 7, and enthusiast-class GeForce 8. ... In coding theory a variable-length code is a code which maps source symbols to a variable number of bits. ... This article or section is in need of attention from an expert on the subject. ... Context-adaptive binary arithmetic coding (CABAC) is a form of entropy coding used in H.264/MPEG-4 AVC video encoding. ... This is a list of linear transformations of functions related to the Fourier transform. ... A deblocking filter is applied to blocks in decoded video to improve visual quality and prediction performance by smoothing the sharp edges which can form between blocks when block coding techniques are used. ... The 65 nanometer (65 nm) process is the next milestone as of 2005 in semiconductor manufacturing and fabrication. ...


In terms of functionality, UVD is similar to the 2nd-generation of PureVideo HD, which Nvidia introduced with its GeForce 8500/8600 series family. But unlike UVD, PureVideo 2 does not assist VLC bitstream decoding for VC-1. Benchmarks have demonstrated UVD to use less CPU-power than PureVideo2 in both Bluray and HD-DVD playback. NVIDIAs PureVideo is an MPEG-2 decoder designed to offload MPEG-2 decoding work from the CPU and software to NVIDIAs GPU series GeForce 6, GeForce 7, and enthusiast-class GeForce 8. ... The Geforce 8 Series is the eighth generation of NVIDIAs GeForce graphics cards. ... In coding theory a variable-length code is a code which maps source symbols to a variable number of bits. ...


Availability

Originally, ATI planned to implement the UVD in its RV550 series GPU aimed at mainstream market, with two different specifications in which one features HDMI and video out support another featuring DVI as well as video-out support, and production was in December 2006, revealed by the slides. However, as of current date, no information about the release of related products. Some suggested the RV550 products were for OEMs. ATIs R520 core (codenamed Fudo) is the foundation for a line of DirectX 9. ... The High-Definition Multi-media Interface (HDMI) is an industry-supported, uncompressed, all-digital audio/video interface. ... For other meanings of DVI, please see DVI (disambiguation). ... Original equipment manufacturer, or OEM, is a term that refers to a situation in which one company purchases a manufactured product from another company and resells the product as its own, usually as a part of a larger product it sells. ...


The Radeon HD 2000 series video cards implements the UVD, for hardware decoding of 1080p high definition contents [4]. However, the Radeon HD 2900 series video cards do not include the UVD (though it is able to provide similar functionality though the use of its shaders), which was incorrectly stated to be present on the product pages and package boxes of the add-in partners' products before the launch of the Radeon HD 2900 XT, either stating the card as featuring AVIVO HD or explicitly UVD, which only the former statement of AVIVO HD is correct. The exclusion of UVD was also confirmed by AMD officials [5]. The graphics processing unit (GPU) codenamed R600 is the foundation of the Radeon HD 2000 series and the FireGL 2007 series video cards developed by ATI Technologies. ... A video card, also referred to as a graphics accelerator card, display adapter, graphics card, and numerous other terms, is an item of personal computer hardware whose function is to generate and output images to a display. ...


ATI plans to introduce next generation IGP motherboards, the RS780 with DirectX 10 capabilities and UVD features. It has been suggested that this article be split into multiple articles. ... The AMD 700 chipset series is a chipset series made by ATI under the brand AMD and is targeted to launch between the end of 2007 to the first half of 2008. ...


See also

“ATI” redirects here. ... “AMD” redirects here. ... The graphics processing unit (GPU) codenamed R600 is the foundation of the Radeon HD 2000 series and the FireGL 2007 series video cards developed by ATI Technologies. ... ATIs R520 core (codenamed Fudo) is the foundation for a line of DirectX 9. ... AVIVO is a video platform ATI first introduced with its R520-based line of GPUs. ... NVIDIAs PureVideo is an MPEG-2 decoder designed to offload MPEG-2 decoding work from the CPU and software to NVIDIAs GPU series GeForce 6, GeForce 7, and enthusiast-class GeForce 8. ...

References

  1. ^ HKEPC report
  2. ^ Leaked slides: slide 1, and slide 2
  3. ^ (Chinese)HardSpell review
  4. ^ HKEPC report
  5. ^ DailyTech report

External links

ATI graphics processors
2D Chips: Mach
Direct3D 3-6: Rage
Direct3D 7.0: Radeon R100
Direct3D 8.0: Radeon R200
Direct3D 9.0: Radeon R300R420R520
Direct3D 10: Radeon R600R700
Other ATI technologies
Chipsets: IGP3xx9000/9100 IGPXpress 200Xpress 3200580X690G790X
Multi-GPU: Multi-renderingCrossFire
Workstations and HPC: FireGLFireMV • FireStream
Consumer electronics: All-In-Wonder • ImageonXilleon
Misc: AVIVOCTMHLSL2GLSLHyperMemory • PowerPlay • TruFormUVD
Game console GPUs: Flipper (GameCube) • Xenos (Xbox 360) • Hollywood (Wii)

 
 

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