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Storing and retrieving high bit depth image data

A technology of image data and images, applied in image communication, digital video signal modification, electrical components, etc., can solve problems such as bandwidth waste

Inactive Publication Date: 2019-05-03
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Direct access to such data causes 6.25% bandwidth waste

Method used

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  • Storing and retrieving high bit depth image data
  • Storing and retrieving high bit depth image data
  • Storing and retrieving high bit depth image data

Examples

Experimental program
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Embodiment Construction

[0023] In general, this disclosure describes techniques for accessing (eg, storing and / or retrieving) image data. Such techniques generally include accessing (eg, storing and / or retrieving) image data in memory in a bandwidth efficient manner. In particular, for example when storing image data, the processing unit may divide the image into individual blocks of pixels. The processing unit may, for example, use left and / or above neighboring pixels to predict a value for a pixel and calculate a residual value for the pixel representing the difference between the predicted value and the actual value. The processing unit may then partition the residual value into most significant bits (MSBs) and least significant bits (LSBs). The processing unit may encode (eg, in a lossless manner) the MSB, and then store the encoded MSB and the uncoded LSB.

[0024] To retrieve image data, the processing unit may perform a reciprocal process. That is, the processing unit may use the reconstruc...

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Abstract

In one example, a device for accessing image data includes a memory configured to store image data, the memory comprising a first region and a second region; and one or more processing units configured to code most significant bits (MSBs) of a plurality of residuals of samples of a block of an image, each of the residuals representing a respective difference value between a respective raw sample value and a respective predicted value for the respective raw sample value, access the coded MSBs in the first region of the memory, and access least significant bits (LSBs) of the plurality of residuals of the samples in the second region of the memory.

Description

technical field [0001] The present disclosure relates to storage and retrieval of image data. Background technique [0002] Image data is used in various applications such as pictures and videos. Raw image data (i.e., uncoded or decoded image data such as picture, video, graphics, or display data) is typically stored prior to encoding, followed by decoding, and then rendered and / or displayed on a display buffer for the image data device. Storage and retrieval of raw image data is often limited by bandwidth in core processing systems, such as video, imaging, graphics, and display core systems. [0003] Image processing systems, such as video, image, and graphics processing pipelines, access (eg, extract or store) raw data as needed for intermediate modules to process. For example, in the case of video processing, intermediate modules extract raw data in the form of reference pixel data, original pixel data, reconstructed pixel data, and the like. Such data access requires...

Claims

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Application Information

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IPC IPC(8): H04N19/13H04N19/146H04N19/184H04N19/93
CPCH04N19/13H04N19/146H04N19/184H04N19/93
Inventor 谢成郑钟仁肃王翔林
Owner QUALCOMM INC