Intel 2700G
Encyclopedia
Intel 2700G is a low power (50 mW
Watt
The watt is a derived unit of power in the International System of Units , named after the Scottish engineer James Watt . The unit, defined as one joule per second, measures the rate of energy conversion.-Definition:...

 max) graphics co-processor for the XScale
XScale
The XScale, a microprocessor core, is Intel's and Marvell's implementation of the ARMv5 architecture, and consists of several distinct families: IXP, IXC, IOP, PXA and CE . Intel sold the PXA family to Marvell Technology Group in June 2006....

 PXA27x processor. It is built on PowerVR
PowerVR
PowerVR is a division of Imagination Technologies that develops hardware and software for 2D and 3D rendering, and for video encoding, decoding, associated image processing and Direct X, OpenGL ES, OpenVG, and OpenCL acceleration....

 MBX Lite (the successor to the graphics technology used in the SEGA
Sega
, usually styled as SEGA, is a multinational video game software developer and an arcade software and hardware development company headquartered in Ōta, Tokyo, Japan, with various offices around the world...

 Dreamcast) and MVED1 (video) technology
Technology
Technology is the making, usage, and knowledge of tools, machines, techniques, crafts, systems or methods of organization in order to solve a problem or perform a specific function. It can also refer to the collection of such tools, machinery, and procedures. The word technology comes ;...

.

2700G3

The 2700G3 is the value version of the accelerator. It has 384 kB
Kilobyte
The kilobyte is a multiple of the unit byte for digital information. Although the prefix kilo- means 1000, the term kilobyte and symbol KB have historically been used to refer to either 1024 bytes or 1000 bytes, dependent upon context, in the fields of computer science and information...

 of on-die memory suitable for driving an HVGA (320x480) or smaller graphics display.

2700G5

The 2700G5 is the performance version of the accelerator. It has 704 kB of on-die memory suitable for driving a VGA (640x480) resolution display and decoding MPEG-4 video.

2700G7

The 2700G7 is the same as the 2700G5 but is stacked with 16 MB
Megabyte
The megabyte is a multiple of the unit byte for digital information storage or transmission with two different values depending on context: bytes generally for computer memory; and one million bytes generally for computer storage. The IEEE Standards Board has decided that "Mega will mean 1 000...

 of local memory with a 100 MHz, 32-bit bus (maximum 400 MB/s theoretical bandwidth) in the same package.

Accelerated Dual Display

The 2700G has its own LCD controller and two LCD outputs. This allows for the XScale processor and 2700G's graphics displays to be used at the same time. The 2700G can drive an external display up to 1024x768 (with 32-bit colour) or 1280x1024 (with 16-bit colour).

2D Graphics Acceleration

The accelerator supports clipping
Clipping (computer graphics)
Any procedure which identifies that portion of a picture which is either inside or outside a picture is referred to as a clipping algorithm or clipping.The region against which an object is to be clipped is called clipping window.-Examples:...

, alpha blending and anti-aliasing
Anti-aliasing
In digital signal processing, spatial anti-aliasing is the technique of minimizing the distortion artifacts known as aliasing when representing a high-resolution image at a lower resolution...

. It also has a variety of block level transfer (BLT) functions (BitBLT, StretchBLT and CSCBLT). The 2D accelerator is capable of up to an 84 million pixels per second fill rate
Fillrate
The term fillrate usually refers to the number of pixels a video card can render and write to video memory in a second. In this case, fillrates are given in megapixels per second or in gigapixels per second , and they are obtained by multiplying the number of raster operations by the clock...

.

3D Graphics Acceleration

The 2700G has a complete hardware rendering pipeline and is compatible with the OpenGL ES
OpenGL ES
OpenGL for Embedded Systems is a subset of the OpenGL 3D graphics application programming interface designed for embedded systems such as mobile phones, PDAs, and video game consoles. OpenGL ES is managed by the not-for-profit technology consortium, the Khronos Group, Inc.- Versions :Several...

 1.0 standard, using the common-lite profile. It features texture compression
Texture compression
Texture compression is a specialized form of image compression designed for storing texture maps in 3D computer graphics rendering systems. Unlike conventional image compression algorithms, texture compression algorithms are optimized for random access....

, anisotropic filtering
Anisotropic filtering
In 3D computer graphics, anisotropic filtering is a method of enhancing the image quality of textures on surfaces that are at oblique viewing angles with respect to the camera where the projection of the texture appears to be non-orthogonal In 3D computer graphics, anisotropic filtering...

, and per vertex fogging
Distance fog
Distance fog is a technique used in 3D computer graphics to enhance the perception of distance by simulating fog.Because many of the shapes in graphical environments are relatively simple, and complex shadows are difficult to render, many graphics engines employ a "fog" gradient so objects further...

 (fog) among other things. The 3D accelerator is capable of processing about 831 000 triangles per second.

Video Acceleration

The 2700G performs Inverse Zig-Zag, Inverse Discrete Cosine Transform, and Motion Compensation
Motion compensation
Motion compensation is an algorithmic technique employed in the encoding of video data for video compression, for example in the generation of MPEG-2 files. Motion compensation describes a picture in terms of the transformation of a reference picture to the current picture. The reference picture...

 to speed up MPEG-1
MPEG-1
MPEG-1 is a standard for lossy compression of video and audio. It is designed to compress VHS-quality raw digital video and CD audio down to 1.5 Mbit/s without excessive quality loss, making video CDs, digital cable/satellite TV and digital audio broadcasting possible.Today, MPEG-1 has become...

, MPEG-2
MPEG-2
MPEG-2 is a standard for "the generic coding of moving pictures and associated audio information". It describes a combination of lossy video compression and lossy audio data compression methods which permit storage and transmission of movies using currently available storage media and transmission...

, MPEG-4
MPEG-4
MPEG-4 is a method of defining compression of audio and visual digital data. It was introduced in late 1998 and designated a standard for a group of audio and video coding formats and related technology agreed upon by the ISO/IEC Moving Picture Experts Group under the formal standard ISO/IEC...

 and WMV video decoding. The accelerator can decode MPEG-1, 2 and WMV at 720x480 (DVD
DVD
A DVD is an optical disc storage media format, invented and developed by Philips, Sony, Toshiba, and Panasonic in 1995. DVDs offer higher storage capacity than Compact Discs while having the same dimensions....

 Resolution) and MPEG-4 at 640x480, both at over 30 frames per second.

Devices

Currently the 2700G is featured in the Dell Axim X50v, Dell Axim X51v, Gigabyte
Gigabyte
The gigabyte is a multiple of the unit byte for digital information storage. The prefix giga means 109 in the International System of Units , therefore 1 gigabyte is...

 GSmart t600, Pepper Pad 2
Pepper Pad
The Pepper Pad is a Linux-based mobile computer with Internet capability and doubles as a handheld game console. It also serves as a portable multimedia device...

 and Palm Foleo
Palm Foleo
The Palm Foleo was a planned subnotebook computer that was announced by mobile device manufacturer Palm Inc. on May 30, 2007, and canceled three months later. It intended to serve as a companion for smartphones including Palm's own Treo line...

(cancelled).

As of Intel selling its XScale unit to Marvell, this device is discontinued.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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