Interface for compressed video data analysis

• US 20050278635A1
• Filed: 08/17/2005
• Published: 12/15/2005
• Est. Priority Date: 12/10/2001
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Zhang, Ji, Zhu, Shan, Liu, Hain-Ching, Shen, Jiandong
• Granted Patent: US 7,536,643 B2
• Time in Patent Office: Days
• US Class Current: 715/723
• CPC Class Codes: G06F 11/3664 Environments for testing or debugging software
• CPC Class Codes: H04N 17/004 for digital television systems

Abstract

The invention described herein provides a video analysis tool to assist a computer programmer working on a program that effects video data. The tool may be integrated with program code. When enacted, the tool obtains statistical information related to the video data and information corresponding to functions of the code. The code may be responsible for encoding, transcoding, and/or decoding video data, for example. The tool is integrated with a video decoder to allow the information to be output with raw video data. The present invention is particularly useful for developing, debugging and analyzing programs responsible for encoding, transcoding, and/or decoding video data, such as video data compressed according to an MPEG standard.

Claims

1. A method implemented on a computer system, the method comprising:

processing a bitstream comprising compressed video data;

receiving a break point at a location in a program;

calling an image analysis tool when the break point is reached;

obtaining compressed video data information from the bitstream; and

visually outputting the compressed video data information using the image analysis tool.

2. The method of claim 1 wherein the compressed video data information comprises statistical information related to the compression of the video data.

3. The method of claim 1 wherein the compressed video data information is visually output according to a segment.

4. The method of claim 3 wherein the video data is compressed according to an MPEG standard.

5. The method of claim 3 wherein the compressed video data information is visually output according to a macroblock.

6. The method of claim 5 wherein the compressed video data information includes a forward motion vector or a backward motion vector for one or more macroblocks.

7. The method of claim 5 wherein the compressed video data information includes a quantization value for one or more macroblocks.

8. The method of claim 1 further comprising generating a quantity that indicates complexity for processing the compressed video data.

9. The method of claim 8 wherein the quantity is a complexity measure for a portion of the compressed video data.

10. The method of claim 8 wherein the quantity is a complexity measure for a picture included in the compressed video data.

11. The method of claim 1 wherein the analysis tool is integrated with a video-processing program.

12. The method of claim 1 wherein the analysis tool is integrated in a debugging program.

13. The method of claim 1 wherein the image analysis tool is called during program execution.

14. The method of claim 13 wherein the program is responsible for transcoding the compressed video data.

15. A computer program product comprising a computer readable medium and program instructions provided via a computer readable medium, the program instructions comprising instructions for providing an image analysis tool presented on a display associated with a computer system, the instructions specifying:

processing a bitstream comprising compressed video data;

receiving a break point at a location in a program;

calling an image analysis tool when the break point is reached;

obtaining compressed video data information from the bitstream; and

visually outputting the compressed video data information using the image analysis tool.

16. The computer program product of claim 15 further comprising instructions for generating a quantity that indicates complexity for processing the compressed video data.

17. The computer program product of claim 15 wherein the compressed video data information is visually output according to a segment.

18. The computer program product of claim 17 wherein the compressed video data information is visually output according to a macroblock.

19. A system for providing an image analysis tool presented on a display associated with a computer system that processes a compressed bitstream, the system comprising:

means for processing a bitstream comprising compressed video data;

means for receiving a break point at a location in a program;

means for calling an image analysis tool when the break point is reached;

means for obtaining compressed video data information from the bitstream; and

means for visually outputting the compressed video data information using the image analysis tool.

20. The system of claim 19 wherein the compressed video data information is visually output according to a segment.

21. The system of claim 20 wherein the compressed video data information is visually output according to a macroblock.

22. The system of claim 19 further comprising means for generating a quantity that indicates complexity for processing the compressed video data.