OPTIMIZING TIMED TEXT GENERATION FOR LIVE CLOSED CAPTIONS AND SUBTITLES

• US 20130076981A1
• Filed: 09/26/2012
• Published: 03/28/2013
• Est. Priority Date: 09/27/2011
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Labrozzi, Scott C., Akers, James Christopher
• Granted Patent: US 9,749,504 B2
• Time in Patent Office: Days
• US Class Current: 348/500
• CPC Class Codes: H04N 21/47 End-user applications
• CPC Class Codes: H04N 21/4884 for displaying subtitles
• CPC Class Codes: H04N 5/04 Synchronising for television systems using pulse code modulation H04N7/56

Abstract

A method is provided in certain example embodiments, and may include receiving source timed text data and an associated time stamp, and rendering a representation of the received source timed text data within a textual array. The textual array includes at least one row having textual data associated with the received source timed text data contained therein. The method may further include producing at least one data document including row data associated with one or more rows of the textual array when the textual data of the at least one row has changed from a previously rendered on-screen representation of previously received source timed text data. The row data includes a change in textual data for one or more rows from a previously produced caption data document.

Claims

1. A method, comprising:

receiving source timed text data and an associated time stamp;

rendering a representation of the received source timed text data within a textual array, the textual array including at least one row having textual data associated with the received source timed text data contained therein; and

producing at least one data document including row data associated with one or more rows of the textual array when the textual data of the at least one row has changed from a previously rendered representation of previously received source timed text data, the row data including a change in textual data for one or more rows from a previously produced caption data document.

2. The method of claim 1, further comprising:

creating at least one display element from the row data of the at least one data document, the at least one display element including one or more display element rows containing textual data from the row data of the caption data document and an associated display time; and

assigning a row identifier for each row of the at least one display element.

3. The method of claim 2, wherein creating the at least one display element includes copying textual data from a previous display element to the at least one display element when a command field of the at least one data document is not indicative of either a screen update or a screen erase.

4. The method of claim 2, wherein the row identifier is the same as a row identifier of a previous display element when textual data of the row of the at least one display element matches textual data of a corresponding row of the previous display element.

5. The method of claim 2, further comprising:

generating a markup language document from the at least one display element, the markup language document including the textual data of the display element rows having display times within a predetermined time period.

6. The method of claim 5, wherein the predetermined time period is between a time identified by the time stamp and a predetermined time offset value.

7. The method of claim 5, wherein the markup language document includes textual data only of rows having a row identifier that has not previously been outputting during the predetermined time period.

8. Logic encoded in non-transitory tangible media that includes code for execution and when executed by a processor operable to perform operations, comprising:

receiving source timed text data and an associated time stamp;

rendering a representation of the received source timed text data within a textual array, the textual array including at least one row having textual data associated with the received source timed text data contained therein; and

producing at least one data document including row data associated with one or more rows of the textual array when the textual data of the at least one row has changed from a previously rendered representation of previously received source timed text data, the row data including a change in textual data for one or more rows from a previously produced caption data document.

9. The logic of claim 8, the operations further comprising:

creating at least one display element from the row data of the at least one data document, the at least one display element including one or more display element rows containing textual data from the row data of the caption data document and an associated display time; and

assigning a row identifier for each row of the at least one display element.

10. The logic of claim 9, wherein creating the at least one display element includes copying textual data from a previous display element to the at least one display element when a command field of the at least one data document is not indicative of either a screen update or a screen erase.

11. The logic of claim 8, wherein the row identifier is the same as a row identifier of a previous display element when textual data of the row of the at least one display element matches textual data of a corresponding row of the previous display element.

12. The logic of claim 8, the operations further comprising:

generating a markup language document from the at least one display element, the markup language document including the textual data of the display element rows having display times within a predetermined time period.

13. The logic of claim 12, wherein the predetermined time period is between a time identified by the time stamp and a predetermined time offset value.

14. The logic of claim 8, wherein the markup language document includes textual data only of rows having a row identifier that has not previously been outputting during the predetermined time period.

15. An apparatus, comprising:

a memory element;

a processor operable to execute instructions associated with electronic code; and

a timed text generator module;

the apparatus configured to;

receive source timed text data and an associated time stamp;

render a representation of the received source timed text data within a textual array, the textual array including at least one row having textual data associated with the received source timed text data contained therein; and

produce at least one data document including row data associated with one or more rows of the textual array when the textual data of the at least one row has changed from a previously representation of previously received source timed text data, the row data including a change in textual data for one or more rows from a previously produced caption data document.

16. The apparatus of claim 15, wherein the apparatus is further configured to:

create at least one display element from the row data of the at least one data document, the at least one display element including one or more display element rows containing textual data from the row data of the caption data document and an associated display time; and

assign a row identifier for each row of the at least one display element.

17. The apparatus of claim 15, wherein creating the at least one display element includes copying textual data from a previous display element to the at least one display element when a command field of the at least one data document is not indicative of either a screen update or a screen erase.

18. The apparatus of claim 15, wherein the row identifier is the same as a row identifier of a previous display element when textual data of the row of the at least one display element matches textual data of a corresponding row of the previous display element.

19. The apparatus of claim 15, wherein the apparatus is further configured to generate a markup language document from the at least one display element, the markup language document including the textual data of the display element rows having display times within a predetermined time period.

20. The apparatus of claim 19, wherein the markup language document includes textual data only of rows having a row identifier that has not previously been outputting during the predetermined time period.