SYSTEMS AND METHODS FOR REDUCING MEMORY BANDWIDTH USING LOW QUALITY TILES

• US 20160247310A1
• Filed: 02/20/2015
• Published: 08/25/2016
• 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
• Granted Patent: US 10,410,398 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 texture based on a difference between a high quality (HQ) tile and a corresponding low quality (LQ) tile;

storing the texture into an alpha channel of the LQ tile; and

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

2. The method of claim 1, further including:

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

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

4. The method of claim 1, wherein the computing a texture includes:

for each LQ pixel in the LQ tile, identifying a corresponding pixel region in the HQ tile;

computing an attribute of the pixel region; and

computing a difference between the attribute of the pixel region and the LQ pixel, wherein the storing the texture includes storing the difference between the attribute of the pixel region and the LQ pixel as a value of the attribute.

5. The method of claim 4, wherein the computing an attribute of the pixel region includes computing an average of the pixel region.

6. The method of claim 1, further including:

for each LQ pixel in the LQ tile, identifying a corresponding pixel region in the HQ tile;

computing a difference between the LQ pixel and each pixel in the pixel region; and

computing an average of the one or more differences between the LQ pixel and each pixel in the pixel region, wherein the storing the texture includes storing the difference between the LQ pixel and each pixel in the pixel region as a value of the attribute.

7. The method of claim 1, further including:

for each LQ pixel in the LQ tile, identifying a corresponding pixel region in the HQ tile;

computing a second texture based on a difference between the LQ pixel and the pixel region, and each pixel in the second texture having a single scalar value representing a difference in pixel intensity between the HQ tile and the LQ tile; and

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

8. The method of claim 7, wherein the second texture has the same resolution as the HQ tile.

9. The method of claim 1, wherein the threshold is configurable.

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 a texture based on a difference between a high quality (HQ) tile and a corresponding low quality (LQ) tile;

store the texture into an alpha channel of the LQ tile; and

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

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

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

13. The system of claim 10, wherein the one or more processors is configured to identify a corresponding pixel region in the HQ tile for each LQ pixel in the LQ tile, compute an attribute of the pixel region, and compute a difference between the attribute of the pixel region and the LQ pixel, and wherein the difference between the attribute of the pixel region and the LQ pixel is the value of the attribute.

14. The system of claim 13, wherein the one or more processors is configured to compute an average of the pixel region, and the average is the attribute of the pixel region.

15. The system of claim 10, wherein the one or more processors is configured to identify a corresponding pixel region in the HQ tile for each LQ pixel in the LQ tile, compute a difference between the LQ pixel and each pixel in the pixel region, and compute an average of the one or more differences between the LQ pixel and each pixel in the pixel region, and wherein the difference between the LQ pixel and each pixel in the pixel region is the value of the attribute.

16. The system of claim 10, wherein the one or more processors is configured to identify a corresponding pixel region in the HQ tile for each LQ pixel in the LQ tile, compute a second texture based on a difference between the LQ pixel and the pixel region, and down-sample the second texture to the resolution of the LQ tile, wherein the computed first texture is the down-sampled second texture.

17. The system of claim 16, wherein each pixel in the second texture has a single scalar value representing a difference in pixel intensity between the HQ tile and the LQ tile, and wherein the second texture has the same resolution as the HQ tile.

18. The system of claim 10, wherein the threshold is configurable.

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

computing a texture based on a difference between a high quality (HQ) tile and a corresponding low quality (LQ) tile;

storing the texture into an alpha channel of the LQ tile; and

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

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

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