Method and system for optimized delta encoding

• US 9,743,094 B2
• Filed: 06/14/2016
• Issued: 08/22/2017
• Est. Priority Date: 12/29/2011
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: Swisscom AG (Government of Switzerland)
• Inventors: Marti, Urs-Viktor, Schlauss, Denis, Hohl, Lukas, Herrmann, Beat
• Primary Examiner(s): Akhavannik, Hadi
• Application Number:
  US15/181,803
• Publication Number:
  US 20160295218A1
• Time in Patent Office: 434 Days
• Field of Search: None
• CPC Class Codes: H04N 19/105 Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
• CPC Class Codes: H04N 19/114 Adapting the group of pictures [GOP] structure, e.g. number of B-frames between two anchor frames H04N19/107 takes precedence
• CPC Class Codes: H04N 19/119 Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
• CPC Class Codes: H04N 19/136 Incoming video signal characteristics or properties
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/177 the unit being a group of pictures [GOP]
• CPC Class Codes: H04N 19/50 using predictive coding H04N19/61 takes precedence
• CPC Class Codes: H04N 19/88 involving rearrangement of data among different coding units, e.g. shuffling, interleaving, scrambling or permutation of pixel data or permutation of transform coefficient data among different blocks
• CPC Class Codes: H04N 19/90 using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals

Abstract

Methods and systems are provided for image processing. A plurality of correlation parameters representing degrees of correlation between two or more images of a plurality of images may be determined. An optimized correlation dependency graph may be generated according to the plurality of correlation parameters. The plurality of images may then be delta encoded according to the optimized correlation dependency graph. For example, the optimized correlation dependency graph may be used for performing a predetermined correlation encoding operation. The plurality of correlation parameters may be determined, for example, in accordance with one or more predetermined correlation metrics associated with the predetermined correlation encoding operation.

Claims

1. A method for image processing, the method comprising:

determining a plurality of correlation parameters, each correlation parameter representing a degree of correlation between two images of a plurality of images, the plurality of images having a first ordering independent of the plurality of correlation parameters;

generating an optimized correlation dependency graph according to said plurality of correlation parameters, the optimized correlation dependency graph having a second ordering dependent on the plurality of correlation parameters; and

delta encoding the plurality of images according to the second ordering.

2. The method of claim 1, comprising determining said plurality of correlation parameters in accordance with one or more predetermined correlation metrics associated with a predetermined delta encoding operation.

3. The method of claim 1, comprising determining an optimized subdivision of the plurality of images.

4. The method of claim 1, comprising determining two or more pluralities of correlation parameters, each plurality of correlation parameters being determined in accordance with a different correlation metric.

5. The method of claim 4, comprising determining an optimized correlation metric according to a comparison of the two or more pluralities of correlation parameters.

6. The method of claim 1, wherein said optimized correlation dependency graph indicates a maximum of said plurality of correlation parameters.

7. The method of claim 1, wherein the second ordering comprises a first image followed by one or more dependent images, each of the one or more dependent images are delta encoded according to the first image.

8. A system for image processing, the system comprising:

a processor that is operable to;

determine a plurality of correlation parameters representing degrees of correlation between two images of a plurality of images, the plurality of images having a first ordering independent of the plurality of correlation parameters;

generate an optimized correlation dependency graph according to said plurality of correlation parameters, the optimized correlation dependency graph having a second ordering dependent on the plurality of correlation parameters; and

delta encode the plurality of images according to the second ordering.

9. The system of claim 8, wherein the processor is operable to determine said plurality of correlation parameters in accordance with one or more predetermined correlation metrics associated with a predetermined delta encoding operation.

10. The system of claim 8, wherein the processor is operable to determine an optimized subdivision of the plurality of images.

11. The system of claim 8, wherein the processor is operable to determine two or more pluralities of correlation parameters, each plurality of correlation parameters being determined in accordance with a different correlation metric.

12. The system of claim 11, wherein the processor is operable to determine an optimized correlation metric according to a comparison of the two or more pluralities of correlation parameters.

13. The system of claim 8, wherein the processor is operable to generate said optimized correlation dependency graph to indicate a maximum of said plurality of correlation parameters.

14. The system of claim 8, wherein the processor is operable to delta encode one or more dependent images, each of the one or more dependent images are delta encoded according to a first image.

15. A camera, the camera comprising:

a memory for storing a plurality of images; and

a processor that is operable to;

determine a plurality of correlation parameters representing degrees of correlation between two images of a plurality of images, the plurality of images having a first ordering independent of the plurality of correlation parameters;

generate an optimized correlation dependency graph according to said plurality of correlation parameters, the optimized correlation dependency graph having a second ordering dependent on the plurality of correlation parameters; and

delta encode the plurality of images according to the second ordering.

16. The camera of claim 15, wherein the processor is operable to determine said plurality of correlation parameters in accordance with one or more predetermined correlation metrics associated with a predetermined delta encoding operation.

17. The camera of claim 15, wherein the processor is operable to determine an optimized subdivision of the plurality of images.

18. The camera of claim 15, wherein the processor is operable to determine two or more pluralities of correlation parameters, each plurality of correlation parameters being determined in accordance with a different correlation metric.

19. The camera of claim 18, wherein the processor is operable to determine an optimized correlation metric according to a comparison of the two or more pluralities of correlation parameters.

20. The camera of claim 15, wherein the processor is operable to generate said optimized correlation dependency graph to indicate a maximum of said plurality of correlation parameters, one or more dependent images being delta encoded according to a first image.