Modifying data

• US 7,729,508 B2
• Filed: 01/11/2006
• Issued: 06/01/2010
• Est. Priority Date: 01/11/2006
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: West, Matthew J.
• Primary Examiner(s): BHATNAGAR, ANAND P
• Application Number:
  US11/329,736
• Publication Number:
  US 20070160297A1
• Time in Patent Office: 1,602 Days
• Field of Search: 382/100, 382/232, 380/54, 380/210, 380/252, 380/287, 713/176, 704/200.1, 704/273, 381/73.1, 348/460, 348/463
• US Class Current: 382/100
• CPC Class Codes: H04N 21/23892 involving embedding information at multiplex stream level, e.g. embedding a watermark at packet level
• CPC Class Codes: H04N 21/4402 involving reformatting operations of video signals for household redistribution, storage or real-time display details of conversion of video standards at pixel level H04N7/01; video transcoding H04N19/40; adapting incoming signals to the display format of the display terminal G09G5/005; media handling at the source in data packet switching networks H04L65/764

Abstract

Embodiments of modifying data are disclosed.

Claims

1. A method comprising:

selecting a portion of a compressed data set to be modified by using an algorithm; and

modifying data of the portion of the compressed data set to form a modified compressed data set having a pattern imperceptible to unaided human sensory perception but identifiable by processing the modified compressed data set using the algorithm, wherein the pattern is based on a subtractive digital patterning that deletes portions of the compressed data set.

2. The method of claim 1, wherein the selecting includes selecting a portion that includes a number of sections of digital data distributed substantially throughout an original compressed digital data set.

3. The method of claim 1 further comprising, creating the pattern on a luminance component, a chrominance blue component, and chrominance red component of the modified compressed data.

4. The method of claim 1 further comprising, creating the pattern with a random number generator so the modified compressed data has random section lengths between one and ten words.

5. The method of claim 1, wherein the subtractive digital patterning deletes portions of digital data from bit planes of digital video data.

6. The method of claim 1 further comprising, generating the pattern to have digital data with different sections lengths patterned to repeat as a one word section followed by a two word section.

7. The method of claim 1, wherein the subtractive digital patterning reduces a sharpness of images generated from the modified compressed data set.

8. The method of claim 1 further comprising:

deleting portions of the compressed data set to generate the pattern;

executing the modified compressed data set such that frames of a resulting image are softer than frames of images resulting from the compressed data set before the subtractive digital patterning.

9. A computing device, comprising:

a processor;

a memory, connected to the processor; and

means to generate a compressed digital data set and delete portions of the compressed digital data set to generate a pattern that is imperceptible to human sensory perception but identifiable by a computer device from an original compressed digital data set.

10. The device of claim 9, wherein a word of a chrominance blue component is deleted from a frame of the compressed digital data set.

11. A method, comprising:

selecting a portion of a compressed data set to be deleted, by using a subtractive patterning algorithm; and

deleting the portion of the compressed data set, to form a modified compressed data set having a subtractive pattern imperceptible to unaided human sensory perception but identifiable by processing the modified compressed data set using the subtractive patterning algorithm.