Method and apparatus for rendering video data

• US 6,791,561 B1
• Filed: 08/22/2000
• Issued: 09/14/2004
• Est. Priority Date: 08/22/2000
• Status: Expired due to Term

• Current Assignee: Saturn Licensing LLC (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Dawson, Thomas
• Primary Examiner(s): Zimmerman, Mark
• Assistant Examiner(s): Santiago, Enrique L
• Application Number:
  US09/643,337
• Time in Patent Office: 1,484 Days
• Field of Search: 345/422, 345/419, 345/582, 345/552, 345/501, 345/531, 345/572, 345/587, 345/427, 345/428, 345/589
• US Class Current: 345/582
• CPC Class Codes: G06T 1/60 Memory management
• CPC Class Codes: G06T 15/04 Texture mapping

Abstract

The present invention provides a method and apparatus for rendering an input video stream as a polygon texture. The method provides process steps to receive the input video data in a Mip Map generator, wherein the Mip Map generator converts the video data to Mip Map data and stores the Mip Map data in a first memory storage device; wherein the first memory storage device is located in a V buffer. The method further includes sending a data set from a Z buffer to V buffer and mapping the data set to RGB values at a texel address in the V buffer memory. The data set includes U, V and Z coordinates, Mip Map level and channel identification data. The V buffer includes a V buffer fetch module that receives the data set from the Z buffer and maps to RGB data within V buffer memory.

Claims

1. A method for combining real-lime video data with video graphics data, comprising:

separating processing of the real-time video data from a rasterization process;

storing real-time video data in a memory that is physically separate from a memory used to read/write texture data;

inserting a flag in a data set during rasterization processing, said flag indicating that the data set is to be textured with video data; and

obtaining a color value from the memory storing the real-time data and combining the color value with a data set output by the rasterizer.

2. The method according to claim 1, further comprising combining the real-time video data with the video graphics data only after a rasterization process is complete.

3. The method according to claim 1, further comprising providing a memory for each of a plurality of real-time video data channels, each of which is separate from the memory used to read/write texture data.

4. The method according to claim 3, further comprising receiving a plurality of real-time video data channels.

5. The method according to claim 1, further comprising:

receiving the real-time video data in a Mip Map generator, wherein the Mip Map generator converts the video data to Mip Map data;

storing the Mip Map data in a first memory storage device, wherein the first memory storage device is located in a V buffer,

sending a data set from a Z buffer to the V buffer; and

determining a texel memory location in the first memory storage device, wherein the texel memory location is based upon the data set.

6. The method according to claim 5, further comprising:

transferring RGB data from the texel memory location to the Z buffer, wherein the RGB data is received by a Z buffer comparator; and

transferring the RGB data from the Z buffer to a second memory storage device.

7. The method according to claim 5, wherein the data set includes U and V coordinates.

8. The method according to claim 5, wherein the data set includes Mip Map level data.

9. The method according to claim 5, wherein the data set includes channel identification data.

10. The method according to claim 5, wherein the data set is converted to RCB data by a V buffer memory.

11. An apparatus for rendering input video data, comprising:

a first memory storing texture data;

a second memory storing real-time video data, said second memory being physically separate from the first memory used to read/write texture data; and

said processor obtaining a color value from the memory storing the real-time data and combining the color value with a data set output by the rasterizer.

12. The apparatus according to claim 11, further comprising a Mip Map generator that receives the input video data and converts the input data to Mip Map data, and stores the Mip Map data in the second memory.

13. The apparatus according to claim 12, further comprising:

a V buffer that receives the Mip Map data associated with the input video stream and a data set from a Z buffer; and

a V buffer memory, wherein the V buffer memory stores Mip Map data.

14. The apparatus according to claim 13, wherein the data set includes U and V coordinates.

15. The apparatus according to claim 13, wherein the data set includes Mip Map level data.

16. The apparatus according to claim 13, wherein the data set includes channel identification data.

17. The apparatus according to claim 13, wherein the V buffer includes a V buffer fetch module that receives the data set from the Z buffer.

18. The apparatus according to claim 17, wherein the V buffer fetch module receives the RGB data from the V buffer memory.

19. A method for transferring RGB data from a storage device to a Z buffer comprising:

separating processing of real-time video data from a rasterization process;

storing real-time video data in a memory this is physically separate from a memory used to read/write texture data;

transferring a data set from a Z buffer to a memory address calculation module;

determining memory addresses for RGB data stored in the memory storing the real-time video data based upon the data set; and

transferring the RGB data from the memory storing the real-time video data buffer to the Z buffer.

20. The method according to claim 19, wherein the data set includes UV coordinates.

21. The method according to claim 19, wherein the data set includes Mip Map level data.

22. The method according to claim 19, wherein the data set includes channel identification values.

23. A method for combining real-time video data with video graphics data, comprising:

inserting a flag in a data set during rasterization processing, said flag indicating that the data set is to be textured with video data; and

obtaining a color value from a memory storing the real-time data and combining the color value with a data output by the rasterizer.

24. The method according to claim 23, further comprising separating processing of the real-time video data from a rasterization process.

25. The method according to claim 23, further comprising storing real-time video data in a memory that is physically separate from a memory used to read/write texture data.

26. A method for combining real-time video data with video graphics data, comprising:

separating processing of the real-time video data from a rasterization process; and

storing real-time video data in a memory that is physically separate from a memory used to read/write texture data.

27. The method according to claim 26, further comprising obtaining a color value from a memory storing the real-time data and combining the color value with a data set output by a rasterizer.