Method and apparatus for mapping live video on to three dimensional objects

• US 6,583,793 B1
• Filed: 01/08/1999
• Issued: 06/24/2003
• Est. Priority Date: 01/08/1999
• Status: Expired due to Term

• Current Assignee: ATI Technologies ULC (Advanced Micro Devices, Inc.)
• Original Assignee: ATI International SRL (Advanced Micro Devices, Inc.)
• Inventors: Vrabel, Mark E., Gould, David Allen
• Primary Examiner(s): Zimmerman, Mark
• Assistant Examiner(s): Cao, Huedung X.
• Application Number:
  US09/227,432
• Time in Patent Office: 1,628 Days
• Field of Search: 345/425, 345/419, 345/422, 345/582, 345/423, 345/679, 345/681
• US Class Current: 345/679
• CPC Class Codes: G06T 15/04 Texture mapping

Abstract

A method and apparatus for providing live video on a three-dimensional object begins by receiving a video stream into a capture buffer. The process then continues by mapping, directly from the capture buffer, the video stream onto the three-dimensional object. Having mapped the live video onto the three-dimensional object it is rendered into a frame buffer and subsequently displayed on a display device.

Claims

1. A method for mapping live video on to a three dimensional object, the method comprises the steps of:

a) receiving a live video stream into a capture buffer;

b) registering the capture buffer as a texture map;

c) mapping, directly from the capture buffer, the live video stream on to the three dimensional object based on texture parameters of the three dimensional object; and

d) rendering the three dimensional object into a frame buffer wherein the rendering includes;

writing the three dimensional object into a back buffer; and

page flipping the back buffer to a front buffer after the three dimensional object has been written into the back buffer.

2. The method of claim 1 further comprises rendering the three dimensional object based on at least one of:

alpha blending, texture composite, specular lighting, fogging, and bump mapping.

3. The method of claim 1, wherein step (a) further comprises:

receiving the live video by a video decoder;

decoding, by the video decoder, the live video to produce video graphics data; and

providing, by the video decoder, the video graphics data to the capture buffer.

4. The method of claim 1 further comprises:

rendering the live video or other live video into a background section of the back buffer.

5. The method of claim 4 further comprises:

receiving the other live video from a second video; and

storing the other live video in a second capture buffer.

6. The method of claim 1 further comprises generating a plurality of perspective texture maps of the video stream.

7. The method of claim 1, wherein step (c) further comprises:

mapping the video stream from the capture memory on to the three dimensional object based on at least one of;

environmental mapping, bump mapping, and terrain mapping.

8. A method for mapping live video on to a three dimensional object, the method comprises the steps of:

a) receiving a video stream of the live video into a capture buffer;

b) registering the capture buffer as a texture map;

c) accessing the capture buffer based on texture coordinates of the three dimensional object;

d) rendering the three dimensional object with the live video thereon, wherein the live video was mapped directly from the capture buffer on to the three dimensional object;

e) writing the three dimensional object into a back buffer; and

f) page flipping the back buffer to a front buffer after the three dimensional object has been written into the back buffer.

9. The method of claim 8, wherein step (a) further comprises:

receiving the live video by a video decoder;

decoding, by the video decoder, the live video to produce video graphics data; and

providing, by the video decoder, the video graphics data to the capture buffer.

10. The method of claim 8 further comprises:

rendering the live video or other live video into a background section of the back buffer.

11. The method of claim 10 further comprises:

receiving the other live video from a second video; and

storing the other live video in a second capture buffer.

12. The method of claim 8, wherein step (d) further comprises:

writing the three dimensional object into a back buffer; and

page flipping the back buffer to a front buffer after the three dimensional object has been written into the back buffer.

13. A video processing system comprises:

a processing module; and

memory operably coupled to the processing module, wherein the memory stores operational instructions that cause the processing module to (a) receive a live video stream into a capture buffer;

(b) register the capture buffer as a texture map;

(c) map, directly from the capture buffer, the live video stream on to the three dimensional object based on texture parameters of the three dimensional object;

(d) render the three dimensional object into a frame buffer;

(e) write the three dimensional object into a back buffer; and

(f) page flip the back buffer to a front buffer after the three dimensional object has been written into the back buffer.

14. The video processing system of claim 13, wherein the memory further comprises operational instructions that cause the processing module to:

receive the live video by a video decoder;

decode, by the video decoder, the live video to produce video graphics data; and

provide, by the video decoder, the video graphics data to the capture buffer.

15. The video processing system of claim 13, wherein the memory further comprises operational instructions that cause the processing module to:

render the live video or other live video into a background section of the back buffer.

16. The video processing system of claim 15, wherein the memory further comprises operational instructions that cause the processing module to:

receive the other live video from a second video; and

store the other live video in a second capture buffer.

17. The video processing system of claim 13, wherein the memory further comprises operational instructions that cause the processing module to:

map the video steam from the capture memory on to the three dimensional object based on at least one of;

environmental mapping, bump mapping, and terrain mapping.

18. The video processing system of claim 16, wherein the memory further comprises operational instructions that cause the processing module to:

map the video steam from the capture memory on to the three dimensional object based on at least one of;

environmental mapping, bump mapping, and terrain mapping.

19. A video processing system comprises:

a processing module; and

memory operably coupled to the processing module, wherein the memory stores operational instructions that cause the processing module to;

(a) receive a live video stream of the live video into a capture buffer;

(b) registering the capture buffer as a texture map;

(c) access the capture buffer based on texture coordinates of the three dimensional object;

(d) render the three dimensional object with the live video thereon, wherein the live video was mapped directly from the capture buffer on to the three dimensional object;

(e) write the three dimensional object into a back buffer; and

(f) page flip the back buffer to a front buffer after the three dimensional object has been written into the back buffer.

20. The video processing system of claim 19, wherein the memory further comprises operational instructions that cause the processing module to:

receive the live video by a video decoder;

decode, by the video decoder, the live video -to produce video graphics data; and

provide, by the video decoder, the video graphics data to the capture buffer.

21. The video processing system of claim 19, wherein the memory further comprises operational instructions that cause the processing module to:

render the live video or other live video into a background section of the back buffer.

22. The video processing system of claim 21, wherein the memory further comprises operational instructions that cause the processing module to:

receive the other live video from a second video; and

store the other live video in a second capture buffer.