Systems and methods for reducing memory bandwidth using low quality tiles

• US 10,410,398 B2
• Filed: 02/20/2015
• Issued: 09/10/2019
• Est. Priority Date: 02/20/2015
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Hui, Shiu Wai, Arulesan, Veluppillai, Wang, Yida
• Primary Examiner(s): Faulk, Devona E
• Assistant Examiner(s): Beard, Charles L
• Application Number:
  US14/628,097
• Publication Number:
  US 20160247310A1
• Time in Patent Office: 1,663 Days
• CPC Class Codes: G06F 16/9577 Optimising the visualization of content, e.g. distillation of HTML documents
• CPC Class Codes: G06T 1/20 Processor architectures; Processor configuration, e.g. pipelining
• CPC Class Codes: G06T 1/60 Memory management
• CPC Class Codes: G06T 11/001 Texturing; Colouring; Generation of texture or colour inpainting G06T5/77
• CPC Class Codes: G06T 15/04 Texture mapping
• CPC Class Codes: G06T 2215/12 Shadow map, environment map
• CPC Class Codes: G06T 3/4092 Image resolution transcoding, e.g. by using client-server architectures
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 2350/00 Solving problems of bandwidth in display systems
• CPC Class Codes: G09G 2360/122 Tiling
• CPC Class Codes: G09G 2370/027 Arrangements and methods specific for the display of internet documents
• CPC Class Codes: G09G 5/393 Arrangements for updating the contents of the bit-mapped memory

Abstract

Systems and methods are disclosed for displaying data on a display device. An example method of displaying data on a display device includes computing a texture based on a difference between a high quality (HQ) tile and a corresponding low quality (LQ) tile. The method also includes storing the texture into an alpha channel of the LQ tile. The method further includes compositing the LQ tile onto the display device when an attribute of the alpha channel satisfies a threshold.

Claims

1. A method of displaying data on a display device, comprising:

computing a difference between an average intensity of a plurality of pixels in a high quality (HQ) version of a first tile and an average intensity of one or more pixels in a corresponding low quality (LQ) version of the first tile, the first tile having an alpha channel;

storing the difference into an attribute of the alpha channel; and

compositing the LQ version of the first tile onto the display device when the attribute of the alpha channel satisfies a threshold.

2. The method of claim 1, further including:

compositing the HQ version of the first tile onto the display device when the attribute of the alpha channel does not satisfy the threshold.

3. The method of claim 2, wherein each LQ pixel in the LQ version of the first tile has an alpha channel.

4. The method of claim 2, further including:

computing a first texture based on the difference;

computing a second texture based on a difference between the plurality of pixels in the HQ version of the first tile and the one or more pixels in the LQ version of the first tile, each pixel in the second texture having a single scalar value representing a difference in pixel intensity between the HQ version of the first tile and the corresponding LQ version of the first tile; and

down-sampling the second texture to a resolution of the LQ version of the first tile, wherein the computed first texture is the down-sampled second texture.

5. The method of claim 4, wherein the second texture has a same resolution as the HQ version of the first tile.

6. The method of claim 2, wherein each pixel in the LQ version of the first tile has a plurality of color channels and an alpha channel, the computer-executable instructions for performing operations further including:

computing a first texture based on the difference, the first texture including a single scalar value per pixel in the LQ version of the first tile.

7. The method of claim 6, wherein each single scalar value of the first texture represents a difference between the plurality of pixels in the HQ version of the first tile and the one or more pixels in the LQ version of the first tile.

8. The method of claim 1, wherein the computing a difference includes computing an average of differences between the plurality of pixels in the HQ version of the first tile and the one or more pixels in the LQ version of the first tile.

9. The method of claim 1, wherein the LQ version of the first tile is a lower resolution version of the HQ version of the first tile.

10. A system for displaying data on a display device, comprising:

a display device;

a memory; and

one or more processors coupled to the memory and display device, wherein the one or more processors is configured to;

compute an average of differences between a plurality of pixels in a high quality (HQ) version of a first tile and one or more pixels in a corresponding low quality (LQ) version of the first tile, the first tile having an alpha channel;

store the difference into an attribute of the alpha; and

composite the LQ version of the first tile onto the display device when the attribute of the alpha channel satisfies a threshold.

11. The system of claim 10, wherein the one or more processors are configured to composite the HQ version of the first tile onto the display device when the attribute of the alpha channel does not satisfy the threshold.

12. The system of claim 11, wherein the one or more processors are configured to compute a first texture based on the average of differences, and compute a second texture based on a difference between the plurality of pixels in the HQ version of the first tile and the one or more pixels in the corresponding LQ version of the first tile.

13. The system of claim 12, wherein each pixel in the second texture has a single scalar value representing a difference in pixel intensity between the HQ version of the first tile and the LQ version of the first tile, and the second texture has a same resolution as the HQ version of the first tile.

14. The system of claim 12, wherein the one or more processors are configured to down-sample the second texture to a resolution of the LQ version of the first tile, and wherein the computed first texture is the down-sampled second texture.

15. The system of claim 10, wherein the LQ version of the first tile is a lower resolution version of the HQ version of the first tile.

16. The system of claim 10, wherein each pixel in the LQ version of the first tile has an alpha channel.

17. The system of claim 16, wherein the one or more processors are configured to compute a difference between an average intensity of the plurality of pixels in the HQ version of the first tile and an average intensity of the one or more pixels in the LQ version of the first tile.

18. A non-transitory computer-readable medium having stored thereon computer-executable instructions for performing operations, comprising:

computing an average of differences between a plurality of pixels in a high quality (HQ) version of a first tile and one or more pixels in a corresponding low quality (LQ) version of the first tile, the first tile having an alpha channel;

storing the difference into an attribute of the alpha channel; and

compositing the LQ version of the first tile onto the display device when the attribute of the alpha channel satisfies a threshold.

19. The non-transitory computer-readable medium of claim 18, wherein the computer-executable instructions for performing operations further include:

compositing the HQ version of the first tile onto the display device when the attribute of the alpha channel does not satisfy the threshold.

20. The non-transitory computer-readable medium of claim 18, the computer-executable instructions for performing operations further comprising:

compositing the HQ version of the first tile onto the display device when the attribute of the alpha channel does not satisfy the threshold.