Granted Patent B2

US 8,620,145 · App. 11/849,898 · Granted Dec 31, 2013

Abstract

Claims (21)

1. A method for use in protecting content, comprising:

accessing media content with sectors reserved for error data;

searching for and identifying a plurality of reserved sectors and selecting multiple reserved sectors of the plurality of sectors;

accessing error data, wherein accessing the error data comprises generating a plurality of series of cells where each of the series of cells comprises a random number of buffer cells such that the first and last cells of each of the series are buffer cells, and at least one error cell randomly positioned within the number of buffer cells;

replacing at least a portion of the reserved sector in the media content with the error data, wherein the replacing at least the portion of the reserved sector comprises replacing each of the selected reserved sectors with one of the plurality of the series of cells;

generating navigation commands that instruct a playback device to skip the error data, wherein generating the navigation commands comprises generating and incorporating cell to cell link commands into the navigation commands; and

recording the navigation commands with the media content and the error data onto a medium.

2. The method of claim 1 , wherein the generating the navigation commands comprises disabling scan mode flags in a navigation pack relative to the error data.

3. The method of claim 1 , wherein the generating the error data comprises generating an error cell and a plurality of buffer cells, and the replacing the at least the portion of the reserved sector comprises replacing the at least the portion of the reserved sector with the error cell and the plurality of buffer cells.

4. The method of claim 3 , wherein the generating the plurality of buffer cells comprises generating a random number of buffer cells, randomly incorporating the error cell within the random number of buffer cells with at least one buffer cell preceding the error cell and at least one buffer cell following the error cell.

5. A method of protecting content, comprising:

accessing media content;

identifying multiple locations within the media content into which error data is to be incorporated;

identifying a number of buffer cells;

identifying a number of error cells;

determining where to position the error cells within the identified number of buffer cells;

incorporating within the media content a number of buffer cells equivalent to the identified number of buffer cells and a number of error cells equal to the number of identified error cells, with the error cells distributed within the number buffer cells;

defining navigation commands within a navigation that instruct a playback device to skip each of the series of the plurality of adjacent cells of error data incorporated into the media content during playback; and

recording the media content, the error data, and the navigation onto a medium.

6. The method of claim 5 , wherein the defining the navigation commands comprises defining and incorporating cell to cell link commands and disabling scan mode flags in a navigation pack relative to the error data.

7. The method of claim 5 , wherein the identifying the multiple locations within the media content comprises evaluating the medium, identifying areas on the medium reserved to receive error data, and identifying portions of the media content to be recorded proximate the identified areas of the medium.

Assignments (13)