Unique method for performing horizontal and vertical video decimation within a wireless device

• US 7,365,748 B2
• Filed: 08/12/2004
• Issued: 04/29/2008
• Est. Priority Date: 08/12/2004
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Li, Weidong, Suen, Ruei-Shiang
• Primary Examiner(s): Hjerpe; Richard
• Assistant Examiner(s): Nguyen; Kevin M
• Application Number:
  US10/917,006
• Publication Number:
  US 20060033731A1
• Time in Patent Office: 1,356 Days
• Field of Search: 345/428, 345/603, 345694-698, 370/347, 455/414.4, 455/457, 455/566, 382/243
• US Class Current: 345/428
• CPC Class Codes: G06T 3/4023 based on decimating pixels or lines of pixels; based on inserting pixels or lines of pixels
• CPC Class Codes: G06T 3/4092 Image resolution transcoding, e.g. by using client-server architectures
• CPC Class Codes: H04M 1/72427 for supporting games or graphical animations
• CPC Class Codes: H04W 4/18 Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A method of presenting graphical images within a wireless terminal that includes receiving an original graphical image, having a source resolution, to be presented on a display screen. The native pixel resolution of the display screen may differ from that of the original graphical image. A complex decimation pattern when applied to the image allows the original graphical image to be resized from the source resolution of the original graphical image to a decimated resolution operable to be displayed within the native resolution of the display screen. Decimated pixels need not be further processed to reduce the processing requirements imposed on the system processor. Operations normally associated with the decimated portions of the image may be offloaded from the processing module to improve system efficiency.

Claims

1. A method to present a graphical image within a wireless terminal, which comprises:

receiving an original graphical image to be presented on a display screen;

determining a source resolution of the original graphical image;

determining a native pixel resolution associated with the display screen;

determining a complex decimation pattern, wherein the complex decimation pattern allows the original graphical image to be resized from the source resolution of the original graphical image to a decimated resolution operable to be displayed within the native resolution of the display screen;

decimating the original graphical image according to the complex decimation pattern; and

presenting the decimated graphical image on the display screen.

2. The method of claim 1, wherein the complex decimation pattern comprises a repeating integer pattern, wherein all integers within the pattern are not equal, and wherein the complex decimation pattern describes a number of undecimated horizontal and/or vertical lines separating decimated horizontal and/or vertical lines.

3. The method of claim 2, wherein the aspect ratio of the original graphical image and the decimated graphical image remains constant.

4. The method of claim 2, wherein the repeating integer program is determined based on comparing the source resolution of the original graphical image and the native resolution of the display screen.

5. The method of claim 1, wherein decimating the original graphical image according to the complex decimation pattern occurs prior to processing the original graphic image.

6. The method of claim 1, wherein the original graphical image is received by a camera interface from a camera sensor, and wherein the camera interface decimates prior to post-processing of the original graphical image.

7. The method of claim 1, wherein the original graphical image is received within a data block received by the wireless terminal, and wherein the camera interface decimates prior to post-processing of the original graphical image.

8. The method of claim 1, wherein the wireless terminal receives and processes graphical images according to a graphical image standard selected from the group of graphical image standards consisting of moving picture expert group MPEG standards;

joint photographic experts group (JPEG) standards;

MPEG1, MPEG 2, MPEG 4, MPEG 7, and MPEG 21 standards.

9. The method of claim 1, wherein the wireless terminal operates according to the GSM standard.

10. The wireless terminal of claim 1, wherein the original graphical image is received within a data block received by the wireless terminal, and wherein the camera interface decimates prior to post-processing of the original graphical image.

11. The wireless terminal of claim 1, wherein the wireless terminal receives and processes graphical images according to a graphical image standard selected from the group of graphical image standards consisting of moving picture expert group MPEG standards;

joint photographic experts group (JPEG) standards;

MPEG1, MPEG 2, MPEG 4, MPEG 7, and MPEG 21 standards.

12. A wireless terminal that comprises:

a Radio Frequency (RF) front end;

a baseband processor communicatively coupled to the RF front end;

a camera operable to capture graphical images;

a display screen operable to display graphical images;

a camera interface that receives captured graphical images and processes the captured graphical images for display within the display screen, and wherein the camera interface is operable to;

determine a source resolution of the graphical image;

determine a native pixel resolution associated with the display screen;

determine a complex decimation pattern, wherein the complex decimation pattern allows the graphical image to be resized from the source resolution to a decimated resolution operable to be displayed within the native resolution of the display screen;

decimate the graphical image according to the complex decimation pattern; and

a video processor operably coupled to the camera interface, wherein the video processor is operable to process video information within the wireless terminal according to a video standard.

13. The wireless terminal of claim 12, wherein the complex decimation pattern comprises a repeating integer pattern, wherein all integers within the pattern are not equal, and wherein the complex decimation pattern describes a number of undecimated horizontal and/or vertical lines separating decimated horizontal and/or vertical lines.

14. The wireless terminal of claim 13, wherein the aspect ratio of the original graphical image and the decimated graphical image remains constant.

15. The wireless terminal of claim 13, wherein the repeating integer program is determined based on comparing the source resolution of the original graphical image and the native resolution of the display screen.

16. The wireless terminal of claim 13, wherein the pre-processing functions comprise:

UYVY format decimation from camera interface output to YUV12 format; and

Noise reduction.

17. The wireless terminal of claim 13, wherein the post-processing functions comprise:

de-blocking;

image scaling to match display resolution;

dithering; and

conversion from YUV12 format to RGB color format.

18. The wireless terminal of claim 12, wherein decimating the original graphical image according to the complex decimation pattern occurs prior to processing the original graphic image.

19. The wireless terminal of claim 12, wherein the wireless terminal operates according to the GSM standard.

20. The wireless terminal of claim 12, wherein the camera interface performs pre-processing functions and post-processing functions.

21. A video processing module within a wireless terminal operable to perform complex decimation on graphical images to be display on a display screen within the wireless terminal comprising:

a graphics interface operable to receive an original graphical image to be presented on the display screen, wherein a source resolution is associated with the original graphical image;

a display screen having a native pixel resolution, wherein the display screen is operably coupled to the graphics interface, and wherein the graphics interface is operable to;

determine a complex decimation pattern that allows the original graphical image to be resized from the source resolution of the original graphical image to a decimated resolution operable to be displayed within the native resolution of the display screen;

decimating the original graphical image according to the complex decimation pattern; and

provide the decimated graphical image to the display screen; and

a video processor to process the original graphical image.

22. The video processing module of claim 21, wherein the original graphical image is received from a camera within the wireless terminal.

23. The video processing module of claim 21, wherein the complex decimation pattern comprises a repeating integer pattern, wherein all integers within the pattern are not equal, and wherein the complex decimation pattern describes a number of undecimated horizontal and/or vertical lines separating decimated horizontal and/or vertical lines.

24. The video processing module of claim 23, wherein the aspect ratio of the original graphical image and the decimated graphical image remains constant.

25. The video processing module of claim 23, wherein the repeating integer program is determined based on comparing the source resolution of the original graphical image and the native resolution of the display screen.

26. The video processing module of claim 23, wherein decimating the original graphical image according to the complex decimation pattern occurs prior to processing the original graphic image.

27. The video processing module of claim 21, wherein the original graphical image is received within a data block received by the wireless terminal, and wherein the camera interface decimates prior to post-processing of the original graphical image.

28. The video processing module of claim 21, wherein the wireless terminal receives and processes graphical images according to a graphical image standard selected from the group of graphical image standards consisting of moving picture expert group MPEG standards;

joint photographic experts group (JPEG) standards;

MPEG1, MPEG 2, MPEG 4, MPEG 7, and MPEG 21 standards.

29. The video processing module of claim 21, wherein the wireless terminal operates according to the GSM standard.