METHODS AND SYSTEMS FOR REPOSITIONING MPEG IMAGE CONTENT WITHOUT RECODING

• US 20060256868A1
• Filed: 05/16/2005
• Published: 11/16/2006
• Est. Priority Date: 05/16/2005
• Status: Abandoned Application

• Current Assignee: Ensequence Incorporated
• Original Assignee: Ensequence Incorporated
• Inventors: Westerman, Larry A.
• Application Number:
  US10/908,545
• Publication Number:
  US 20060256868A1
• Time in Patent Office: Days
• US Class Current: 375/240.240
• CPC Class Codes: H04N 19/103 Selection of coding mode or of prediction mode
• CPC Class Codes: H04N 19/132 Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
• CPC Class Codes: H04N 19/162 User input
• CPC Class Codes: H04N 19/17 the unit being an image region, e.g. an object
• CPC Class Codes: H04N 19/174 the region being a slice, e.g. a line of blocks or a group of blocks
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/48 using compressed domain processing techniques other than decoding, e.g. modification of transform coefficients, variable length coding [VLC] data or run-length data motion estimation in a transform domain H04N19/547; processing of decoded motion vectors H04N19/513
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards

Abstract

Methods, systems and computer-program products for encoding an image so that a portion of the image can be extracted without requiring modification of any of the encoded data. A valid MPEG I-frame sequence is generated from the portion of the image, then fed directly to an MPEG decoder for decompression and display.

Claims

1. A computer-based method comprising:

byte aligning macroblocks in an image; and

transmitting at least a portion of all the macroblocks of the image.

2. The method of claim 1, wherein byte aligning is based on residuum of size of each macroblock in the image.

3. The method of claim 2, wherein byte aligning comprises padding at least one macroblock based on the residuum of size of the at least one macroblock.

4. A computer-based method comprising:

receiving an image having byte aligned macroblocks;

selecting a portion of the received image;

encoding the selection portion according to a predefined video encoding scheme;

decoding the encoded portion according to the predefined video encoding scheme; and

displaying the decoded portion.

5. The method of claim 4, wherein the byte aligned macroblocks are based on residuum of size of each macroblock.

6. The method of claim 4, wherein the predefined video encoding scheme includes at least one of MPEG-1 or MPEG-2.

7. The method of claim 4, wherein selecting includes manually selecting a portion of the byte aligned image using a user interface device associated with a set top box.

8. A computer-based system comprising:

a first component configured to byte align macroblocks in an image; and

a second component configured to transmit at least a portion of all the macroblocks of the image.

9. The system of claim 8, wherein the first component byte aligns based on residuum of size of each macroblock in the image.

10. The system of claim 9, wherein the first component pads at least one macroblock based on the residuum of size of the at least one macroblock.

11. A computer-based system comprising:

a first component configured to receive an image having byte aligned macroblocks;

a second component configured to select a portion of the received image;

a third component configured to encode the selected portion according to a predefined video encoding scheme;

a fourth component configured to decode the encoded portion according to the predefined video encoding scheme; and

a display device configured to display the decoded portion.

12. The system of claim 11, wherein the components are included in a set top box.

13. The system of claim 11, wherein the predefined video encoding scheme includes at least one of MPEG-1 or MPEG-2.

14. The system of claim 11, wherein the first component includes a user interface device configured to allow manual selection of a portion of the byte aligned image.

15. A computer-based system comprising:

a first component configured to byte align macroblocks in an image, wherein the image is larger than a standard image size;

a second component configured to select a portion of the byte aligned image; and

a third component configured to transmit the selected portion of the byte aligned image.

16. The system of claim 15, wherein the first component byte aligns based on residuum of size of each macroblock in the image.

17. The system of claim 16, wherein the first component pads at least one macroblock based on the residuum of size of the at least one macroblock.

18. A computer-based system comprising:

a first component configured to receive an image having byte aligned macroblocks;

a second component configured to encode the received image according to a predefined video encoding scheme;

a third component configured to decode the encoded portion according to the predefined video encoding scheme; and

a display device configured to display the decoded portion.

19. The system of claim 18, wherein the second computer system includes a set top box.

20. The system of claim 18, wherein the predefined video encoding scheme includes at least one of MPEG-1 or MPEG-2.

21. A computer-readable medium for performing the method comprising:

byte aligning macroblocks in an image; and

transmitting at least a portion of all the macroblocks of the image.

22. A computer-readable medium for performing the method comprising:

encoding a portion of an image having byte aligned macroblocks, wherein encoding is performed according to a predefined video encoding scheme;

decoding the encoded portion according to the predefined video encoding scheme; and

displaying the decoded portion.