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Mixed mode for frame buffer compression

A mixed mode and mixed block technology, applied in the direction of instruments, calculations, electrical components, etc., to achieve the effect of low computational complexity

Active Publication Date: 2015-10-07
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such blocks of pixels can be extremely difficult to compress using existing methods while maintaining high visual quality

Method used

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  • Mixed mode for frame buffer compression
  • Mixed mode for frame buffer compression
  • Mixed mode for frame buffer compression

Examples

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Embodiment Construction

[0019] introduction

[0020] Embodiments of the invention relate to techniques for compressing image data or other graphics data in a frame buffer. The mixed-mode compression schemes disclosed herein can be used to code graphics content containing one or two color channels exhibiting relatively low variations in pixel intensity and the remaining one or more color channels exhibiting relatively high variations. aisle. An example of a mixed-mode compression scheme consists of three main steps: first, analyze the RGB or YC o C g pixel values ​​in each color channel of the image to determine how many channels are smooth and how many are variable; second, based on channel analysis to determine if and how mixed-mode compression should be used; and third, based on channel Analysis performs hybrid decoding to compress color channels adaptively and individually. By compressing the data, the techniques described in this disclosure may reduce the amount of data that needs to be store...

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Abstract

Certain aspects relate to systems and techniques for compressing image data using mixed mode compression schemes. A mixed mode compression scheme can reduce the amount of data stored in a frame buffer to reduce power costs of an image display system. In some implementations, mixed mode compression can be suitable for compression of pixel blocks having one or two color channels exhibiting a relatively low variation in pixel intensity with the remaining channel or channels exhibiting a relatively high variation. The pixel values in each color channel of an RGB or YCoCg image can be analyzed to determine how many channels are a smooth component and how many channels are a variant component, and mixed mode compression can be selected and implemented based on the color channel analysis to adaptively and individually compress the color channels.

Description

technical field [0001] The systems and methods disclosed herein are directed to image data, and more specifically to compression of image data. Background technique [0002] Even handheld computing devices such as mobile phones and tablet computers now require high-resolution, high-color-rendering displays, requiring high-wattage backlights and large frame-buffer memories, which together result in high power consumption. The framebuffer (the area of ​​memory that stores fragments of data during rasterization of an image on a display) is a significant consumer of both memory bandwidth and storage space, and this can adversely affect the memory subsections of a graphics processing unit (GPU). system. Additionally, the frame buffer along with the display backlight consumes a significant percentage of the device's power. In particular, in mobile devices with limited battery life, frame buffer power consumption can present a considerable challenge given the high refresh rate, r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/11H04N19/14H04N19/186H04N19/124H04N19/46H04N19/70
CPCG06T9/00H04N19/11H04N19/124H04N19/14H04N19/186H04N19/46H04N19/70
Inventor 滕佳缘纳坦·海姆·雅各布森
Owner QUALCOMM INC
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