of VIA PM800
Chromotion CE Video Display Engine
- Fully compatible with all popular digital video playback software including
WinDVD, PowerDVD, and Windows Media Player, the integrated hardware
MPEG-2 decoder enables flawless 30 frames per second playback of
digital video, while freeing the processor for other tasks.
The decoder engine incorporates MPEG-1 and MPEG-2 variable length
decoding (VLD), de-Quantization, inverse scan, iDCT and hardware-assisted
Motion Compensation. By off-loading these tasks to the chipset hardware
CPU utilization is greatly reduced, meaning the processing power
of the CPU can be allocated for other tasks such as audio decoding,
subpicture decoding, decryption and navigation.
Figure 1: Power DVD 5.0 - CPU Usage
De-Interlacing - In order to play digital
video content on a TV display it must be converted (in
real time) from an interlaced to a progressive format.
VIA UniChrome Pro utilizes the intelligent Adaptive
De-interlace Technique (ADT) to analyze each pixel and
determine how best to display it on progressive format
monitors for the best possible effect. The most common
methods of De-Interlacing are Bob and Weave.
The Bob process is an
effective De-Interlacing method for areas of video that represent
motion, but is not ideal for areas of video with no motion.
Note the blurred appearance of the spectators in the background,
while the car is displayed clearly.
2: Video Playback utilizing Bob De-Interlacing
The Weave process is
more suited for video with little or no motion, but is not suitable
for areas of video with motion.
Note the blurred appearance of the car, while the spectators
in the background are displayed clearly.
3: Video Playback utilizing Weave De-Interlacing
UniChrome Pro's Advanced De-Interlacing
Technique (ADT) combines Bob and Weave processes, examining
every pixel of each field and determining whether to Bob, or Weave
with the past field, or to Weave with the future field.
Note the crisp, clear appearance of both the car and the spectators
in the background.
4: Video Playback utilizing VIA UniChrome Pro's
Advanced De Interlacing Technique
Deblocking - VIA UniChrome Pro features
Hardware Video De-blocking, reducing the appearance
of pixel 'blocks' in real time when displaying highly
compressed video streams.
Figure 5: Image Improvement
with Hardware Video Deblocking
Comprehensive Range of Hi-Def Outputs
- The VIA UniChrome Pro features a comprehensive range
of video outputs through the Chromotion CE Video Display
engine, offering a breathtaking visual experience for
the latest HDTV formats up to 1080p, such as Microsoft's®
WMV HD. In combination with a 1080p HDTV compatible
TV-Out or DVI encoder chip, the VIA UniChrome Pro supports
all HDTV formats including the latest 1080p displays,
and also integrates a DVI flat panel interface . For
systems with an integrated display, the VIA UniChrome
Pro provides a DFP interface that supports single or
dual channel LVDS encoders. A dedicated interface is
also provided for TV Encoders to standard NTSC or PAL
UniChrome™ Pro IGP Graphics Core
With an internal data flow equivalent to that offered
by the latest AGP 8X graphics cards, VIA UniChrome Pro
has separate 128-bit data paths for pixel data flow
and texture/command access.
The 128-bit 2D graphics engine enables acceleration of high quality
graphics features, allowing all productivity applications to run
with the best appearance possible while not sacrificing system performance.
The 128-bit 3D graphics engines features dual pixel rendering pipes
for advanced 3D rendering, and is capable of two textures per pass
with a triangle rate up to 4.5 million triangles per second, a pixel
rate up to 200 million pixels per second, and a texel bilinear fill
rate up to 400 million texels per second.
Advanced Memory Controller
VIA's acclaimed FastStream64 memory controller enables lightening
fast memory access speeds and optimal system performance, supporting
up to 8GB of DDR266, 333, or 400 memory.
High Performance CPU Interface
The PM800 chipset supports connections to the latest Intel® Pentium®
4 Processors supporting 800MHz FSB and Hyper-Threading technology,
including Prescott core based processors.
Unified VIA Hyperion 4in1 Drivers
VIA's unified approach to drivers has been established for eight
generations of chipsets, allowing end users to benefit from seamless
hardware and software compatibility.
*Requires connection to a 1080p HDTV compatible TV-Out or DVI
**RAID Level 0+1 requires four SATA drives; support for the
two additional drives can only be implemented with two external SATA
ports enabled through a SATALite PHY.