Abstract: One embodiment of the present invention sets forth a system for generating multiple video output signals from a single video pipeline within a graphics processing unit. Pixel data from more than one display surface is retrieved and multiplexed before being transmitted to a video pipeline for processing. The resulting video pixel data is routed to video output encoders, which selectively accept the video pixel data for transmission to attached display devices.

Abstract: Error accumulation dithering is used to generate images of lower color resolution from input data of higher color resolution. A target color is received at high resolution for a current pixel of the image. The target color is intermediate between a first color and a second color at a low color resolution. One of the first color and the second color is selected as a final pixel color, based on whether an accumulated error determined from previous pixels is above or below a threshold amount. After selecting the final pixel color, an updated accumulated error is provided to the next pixel.

Abstract: One embodiment of the present invention sets forth a system for generating multiple video output signals from a single video pipeline within a graphics processing unit. Pixel data from more than one display surface is retrieved and multiplexed before being transmitted to a video pipeline for processing. The resulting video pixel data is routed to video output encoders, which selectively accept the video pixel data for transmission to attached display devices.

Abstract: One embodiment of the present invention sets forth a system for generating multiple video output signals from a single video pipeline within a graphics processing unit. Pixel data from more than one display surface is retrieved and multiplexed before being transmitted to a video pipeline for processing. The resulting video pixel data is routed to video output encoders, which selectively accept the video pixel data for transmission to attached display devices.

Abstract: One embodiment of the present invention sets forth a system for generating multiple video output signals from a single video pipeline within a graphics processing unit. Pixel data from more than one display surface is retrieved and multiplexed before being transmitted to a video pipeline for processing. The resulting video pixel data is routed to video output encoders, which selectively accept the video pixel data for transmission to attached display devices.

Abstract: One embodiment of a configurable multi-tap filter includes a parallel-to-serial formatter configured to transform a pixel stream into a first component pixel stream and a second component pixel stream, a configurable memory that includes a first channel and a second channel, wherein pixels from the first component pixel stream are stored in the first channel and pixels from the second component pixel stream are stored in the second channel, and a multi-tap filter configured to process a component of a pixel from the first channel and a like component of a pixel from the second channel. In various embodiments, the configurable multi-tap filter may be implemented as a two-tap, three-tap or five-tap filter and may be used to process either RGB or YUV pixels streams. One advantage of the disclosed configurable multi-tap filter is that it uses memory more efficiently than prior art filters.

Abstract: An output pipeline for a video processing device provides supersampling of the output data the digital domain to eliminate or reduce unwanted frequency components in an analog output signal. An encoder converts a pixel stream to digital sample values for a target analog signal at a base sampling rate. The base data stream is supersampled, and the supersampled data is provided to a digital to analog converter The supersampling rate can be selected so as to provide substantial attenuation of a higher frequency echo in the analog output signal.

Abstract: A graphics processing graphics processing apparatus, which includes an RGB color space to a luminance color, blue color difference and red color difference (YCbCr) color space converter module configured to convert one or more pixel data from the RGB color space to the YCbCr color space using a set of approximated color space coefficients. The graphics processing apparatus further includes a hue and saturation control module coupled to the RGB to YCbCr color space converter module. The hue and saturation control module is configured to modify the hue and saturation of the pixel data in the YCbCr color space. The graphics processing apparatus further includes a YCbCr to RGB color space converter module configured to convert the pixel data from the YCbCr color space to the RGB color space.

Abstract: A system adjusts floating-point-valued images prior to conversion to a display signal so that the dynamic range of the display device is effectively used. Images are adjusted using transfer functions to create an adjusted image within the dynamic range of the display device. The adjusted image also has a frequency distribution of pixel values to maximize the perception of visual detail. The system generates transfer functions from statistical attributes of one or more images. The transfer functions are applied to images on the fly as they are converted into a display signal. The statistical attributes of the image are computed on the fly as it is converted into a display signal. A first transfer function is applied to an image to produce an adjusted image in parallel with the generation of a second transfer function to be applied to a future image.

Abstract: An apparatus for graphics processing unit, which includes a memory for storing pixel data in a red, green and blue (RGB) color space and a display pipeline. The display pipeline includes an RGB color space to a luminance color, blue color difference and red color difference (YCbCr) color space converter module configured to convert the pixel data from the RGB color space to the YCbCr color space. The RGB to YCbCr color space converter module generates a luminance color component (Y) of the pixel data by adding ¼ of a red color (R) component of the pixel data to ½ of a green color (G) component of the pixel data and ¼ of a blue color (B) component of the pixel data. The luminance color component (Y) of the pixel data may be determined by left shifting the green color (G) component of the pixel data by one bit, adding the result to the red color (R) component of the pixel data and the blue color (B) component of the pixel data, and right shifting the sum by two bits.

Abstract: A method and system are provided for efficiently implementing a dual finite impulse response (FIR) filter to vertically filter video data. A unique feedback mechanism enables multi-filter performance while implementing fewer actual filters and accompanying line delays than required in the available art. Advantageous placement of arithmetic elements is used to compensate for approximation error introduced by the feedback mechanism, resulting in substantially undiminished circuit performance in a more efficient circuit than currently available.