89 results about "Graphics accelerator" patented technology

Systems and methods for applying virtual machines to graphics hardware are provided. In various embodiments of the invention, while supervisory code runs on the CPU, the actual graphics work items are run directly on the graphics hardware and the supervisory code is structured as a graphics virtual machine monitor. Application compatibility is retained using virtual machine monitor (VMM) technology to run a first operating system (OS), such as an original OS version, simultaneously with a second OS, such as a new version OS, in separate virtual machines (VMs). VMM technology applied to host processors is extended to graphics processing units (GPUs) to allow hardware access to graphics accelerators, ensuring that legacy applications operate at full performance. The invention also provides methods to make the user experience cosmetically seamless while running multiple applications in different VMs. In other aspects of the invention, by employing VMM technology, the virtualized graphics architecture of the invention is extended to provide trusted services and content protection.

A clip testing unit within a graphics accelerator for comparing a value of a given homogeneous coordinate of a vertex position of a polygon relative to a plurality of clipping planes. The plurality of clipping planes includes both regular and guard band clipping planes. The clip testing unit includes registers for receiving and storing a W value corresponding to the vertex position, as well as a coordinate input register for receiving and storing the given homogeneous coordinate. The W value is conveyed to a guard band W generation unit, which generates a guard band W value in response thereto. The clip testing unit also includes a clip compare unit coupled to receive the W value, the guard band W value and the value of the given coordinate. The clip compare unit receives and compares the W value and the value of the given coordinate, generating one or more first clip signals in response thereto. The one or more first clip signals indicate whether the value of the given coordinate is outside of a regular clipping space defined by the regular clipping planes. Furthermore, the clip compare unit receives and compares the guard band W value and the value of the given coordinate, generating one or more second clip signals in response thereto. The one or more second clip signals indicate whether the value of the given coordinate is outside of a guard band clipping space defined by the guard band clipping planes. Because the first and second clip comparisons are performed substantially concurrently by the clip compare unit, the clip testing performance of the graphics accelerator is advantageously increased.

Methods and systems for volume rendering three-dimensional ultrasound data sets in an acoustic grid using a graphics processing unit are provided. For example, commercially available graphic accelerators cards using 3D texturing may provide 256x, 256x128 8 bit volumes at 25 volumes per second or better for generating a display of 512x512 pixels using ultrasound data. By rendering from data at least in part in an acoustic grid, the amount of scan conversion processing is reduced or eliminated prior to the rendering.

A 3-D graphics accelerator for performing lighting operations using operands within a given fixed point numeric range. The 3-D graphics accelerator includes a first computational unit which is configured to compute a value of an attenuation factor usable for performing said lighting operation for local lights. The attenuation factor is represented in floating point format. The first computational unit is also configured to represent the attenuation factor in an intermediate format including a first intermediate value (a scaled attenuation factor value within the given fixed point numeric range), and a second intermediate value (a shift count usable to convert the scaled attenuation factor value back to the original attenuation factor value). The 3-D graphics accelerator further includes a lighting unit coupled to said first computational unit. The first computational unit is further configured to convey the intermediate representation of the attenuation factor to the lighting unit. The lighting unit performs lighting calculations in fixed point, using operands within the given numeric range (such as the scaled attenuation factors). The lighting unit generates intermediate color values as a result of these lighting calculations. The lighting unit then uses the shift count value to shift the intermediate color values by an appropriate amount, thereby generating a final color value. The lighting unit clamps said final color value to a predetermined maximum color value in response to said final color value exceeding said predetermined maximum color value.

Systems and methods for imaging waveform volumes. An image of the waveform volume may be drawn on a display device as a two-dimensional image or a three-dimensional image of a sampling probe and redrawn in real-time at interactive rates using a graphics accelerator or a graphics card. The image of the waveform volume may also include seismic-data traces that are color-filled according to texture coordinates for pixels on the display device that intersect the waveform volume.

The present invention relates to computer graphics. This method allows efficient real-time 3D rendering of high-detail smooth surfaces. It is exceptionally effective with software rendering and low-end weaker graphics accelerators, and provides excellent visible quality per the amount of polygons used, while retaining low CPU processing overhead and high efficiency on graphics hardware. Also, it can be used under very restrictive memory requirements. In particular the invention relates to real time rendering of extremely detailed smooth surfaces with view-dependent tessellation using an improved level of detail approach. The invention utilizes a quad-tree map and geometric boundaries consisting of manifold non-self-intersecting surfaces. All cached fragments keep all of the information loaded from their corresponding source nodes in system memory, and additional information computed by the rendering system.

A screen image for operating a modeling application in a web application server device is displayed in a browser window of a web client device. When an operator inputs an operation related to a three-dimensional model whose CG should be displayed in the screen, the web application server device transmits a drawing command to draw CG of the three-dimensional model to the web client device. The web client device draws CG of the three-dimensional model according to the drawing command through the use of its own graphic accelerator. The invention allows the high-speed drawing of CG of a three-dimensional model on the web client device even when the web application server device provides a modeling service to the web client device.

A system and method for optimizing the performance of a graphics intensive software program for graphics acceleration hardware. This system and method encompasses a procedure that validates the different functions of a 3D acceleration capable video card, decides whether to use the acceleration hardware and optimizes the software application to selectively use the functions that work on the specific video acceleration card. Functions checked include sub-pixel positioning, opacity, color replacement and fog. If these tests are successful, then the graphics acceleration is used by the software application. However, if the tests are not successful the decision is made not to use graphics accelerator. Those with ordinary skill in the art will realize that it is not necessary to perform all of the tests in a specific order. Additionally, other types of tests could be performed to ensure software application and video card compatibility before the software application is uses graphics acceleration to render 3D graphics.

A method and apparatus for processing recorded coded audiovisual data to facilitate reverse playback permits the user to play back recorded material in a temporally reversed manner at speeds of at least 1X or greater by storing the decoded frames in a graphics accelerator memory of a recording system. By storing decoded MPEG video frames representing the audiovisual data in the graphics accelerator's memory, it is possible to display all the frames of a group of pictures GOP in reverse order. Instead of using the memory of a graphics accelerator, the apparatus may also be configured to have sufficient space available in memory to store the decoded MPEG video frames. In either configuration, reverse playback may be effectuated with a much finer temporal granularity than what is currently achievable by conventional video recording apparatuses.

A graphics accelerator includes a vertex input for receiving vertex data, an output for forwarding processed data, and a processor coupled with the vertex input and output. The graphics accelerator also includes an instruction input that receives instructions for processing the vertex data received from the vertex input. The processor is responsive to wide word instructions.

The invention is applicable to multimedia data processing field, which provides a vector graph accelerating method and a multimedia player. The method comprises the following steps: decomposing the vector graph into basic graphs formed by flat-bottom trapezoids or straight lines; and transmitting the decomposing result of the vector graph to a hardware accelerating logic for processing. The invention allows the basic graphs processed by a graph accelerator to be standard, simple and convenient for hardware design and implementation through decomposing the vector graph into combinations with the flat-bottom trapezoids or straight lines as the basic graphs, thus promoting acceleration performance, reducing power consumption of products and shortening the development cycle of products.

The present invention relates to a system according to claim 1, where the pixel buffer cache comprises at least one row descriptor for tracking and monitoring the activities of read and write requests of a particular tile. A system for providing a high bandwidth memory access to a graphics processor comprising: (a) a frame buffer for storing at least one frame, where said frame is stored in a tiled manner; (b) a memory controller for controlling said frame buffer; (c) a pixel buffer cache for storing multiple sections of at least one memory row of said frame buffer, and for processing requests to access pixels of said frame buffer; (d) a graphics accelerator having an interface to said pixel buffer cache for processing a group of related pixels; and (e) a CPU for processing graphic commands and controlling said graphics accelerator and said pixel buffer cache.

A signal processing system and method for a GNSS digital signal wherein a carrier-stripped GNSS signal, is sampled according to a variable rate, determined by the code NCO, and including a timing circuit arranged to generate a timestamp code determining the sampling time of at least one of the samples in the buffer memory. By taking code samples in this way it is possible to transfer the samples asynchronously to a separate processor for the search task to be performed, for example an asynchronous parallel correlator implemented in the same silicon in hardware, or a media processor such as a graphics accelerator implemented in the same device or a separate physical device.

The present invention provides an image accelerator and an image processing method. The image accelerator includes: a DMA controller, a buffer, a creater, and a composing slice element operation component. The DMA controller transfers the corresponding data stored in an external memory to the buffer; the creater takes data out from the buffer, conducts value inserting according to parameters, produces information of every point of a triangle, makes calculation on data of every pixel which is gotten after the value inserting, the composing slice element operation component conducts composing slice element operation on the parameter according to the signal of the creater, and writes results back to the buffer. The present invention does not excessively occupy the resource of the microprocessor and the accessing bandwidth of the memory, can meet the real time performance of the 3D image processing, can meet the requirement of the low power consumption of the equipment, and has low cost.

The preferred embodiments of the present invention provide a system and method for reducing the battery power required by a handheld device (300) that incorporates a graphical display (301). Graphical display (301), display drivers (307), LCD controller (403) and a memory (405) are optimized such that several pixels of information may be clocked simultaneously when the device is operating in a partial display mode. The optimized circuitry reduces the required refresh clock frequency (411) and thus the current drain on a device battery (319) thereby improving device operation time.

A method, medium, and apparatus controlling a 3D graphics accelerator. The apparatus may include a voltage controller to determine a voltage and frequency supplied to the 3D graphics accelerator by using the 3D graphics data, so that a frames per second (FPS) of the image does not exceed a predetermined threshold, and a voltage supplier to supply a voltage and the frequency to the 3D graphics accelerator. The voltage and frequency supplied to the 3D graphics accelerator may be adjusted by a DVS technique so that the FPS of the generated image does not exceed the predetermined threshold. Accordingly, it is possible to control power consumption of the 3D graphics accelerator while maintaining performance at or above a given level. In particular, it is possible to very efficiently process a small amount of 3D graphics data with low power in a portable device.

Methods and apparatus are provided for automatically generating instruction sequences for verifying the operation of a processor, such as a central processing unit, a processor core, a graphics accelerator, or a digital signal processor. The instruction sequences can also be used to verify the operation of tools associated with implementing a processor. Test parameters are used to combine test fragments to generate test instructions. Check instructions are also provided to immediately identify faults encountered during operation.

A method of testing a graphic accelerator in DOS mode comprises the steps of: setting the calculator system in DOS 32 bit full address mode, but not in the protect mode; mapping the RAM of the graphic accelerator to a predetermined location somewhere in the 0-4G space of the system RAM; preparing a test software such as BitBlt, H/W cursor, 3D Texture; preparing an original pattern, generally a ready bitmap; copying the pattern from the system RAM to the video RAM of the graphic accelerator, verifying the result, and if errors occur, dealing with the errors; copying the pattern from the video RAM to the video RAM, verifying the result, and if errors occur, dealing with the errors; performing a test of color image to monochrome image conversion, verifying the result, and if errors occur, dealing with the errors; and restoring the normal 16 bit address mode VGA mode.