System and Method of Filtering Noise

• US 20170195691A1
• Filed: 03/20/2017
• Published: 07/06/2017
• Est. Priority Date: 06/05/2001
• Status: Active Grant

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Inventors: CIVANLAR, Mehmet Reha, PURI, Atul
• Granted Patent: US 9,924,201 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 18/24 Classification techniques
• CPC Class Codes: H04N 19/136 Incoming video signal characteristics or properties
• CPC Class Codes: H04N 19/65 using error resilience
• CPC Class Codes: H04N 19/86 involving reduction of coding artifacts, e.g. of blockiness
• CPC Class Codes: H04N 5/21 Circuitry for suppressing or minimising disturbance, e.g. moiré or halo

Abstract

A system and method of removing noise in a bitstream is disclosed. Based on the segment classifications of a bitstream, each segment or portion is encoded with a different encoder associated with the portion model and chosen from a plurality of encoders. The coded bitstream for each segment includes information regarding which encoder was used to encode that segment. A circuit for removing noise in video content includes a first filter connected to a first input switch and a first output switch, the first filter being in parallel with a first pass-through line, a second filter connected to a second input switch and a second output switch, the second filter connected in parallel with a second pass-through line, and a third filter connected to a third input switch in a third output switch.

Claims

1. A method comprising:

receiving data comprising a plurality of data portions, wherein a respective data portion of the plurality of data portions is chronologically distinct from other data portions of the plurality of data portions;

identifying, via a processor, a classification parameter for the respective data portion;

classifying the respective data portion into a respective content classification according to the classification parameter for the respective data portion;

encoding the respective data portion using a respective encoder from a plurality of encoders according to the respective content classification, to yield encoded data; and

multiplexing the encoded data with an encoded filter description.

2. The method of claim 1, further comprising:

identifying filters associated with the respective data portion, to yield a filter descriptor; and

encoding the filter description, to yield the encoded filter description.

3. The method of claim 1, wherein the data comprises video data.

4. The method of claim 1, wherein the respective content classification comprises at least one of a person, an object, an action, a location, a time scene change, a color, a region of interest, a local texture, a human face, and a global motion.

5. The method of claim 1, wherein each encoder of the plurality of encoders is associated with at least one encoding parameter.

6. The method of claim 5, further comprising determining, prior to encoding the data, which encoder of the plurality of encoders best corresponds to the respective data portion, according to a comparison of the classification parameter for the respective data portion to the at least one encoding parameter associated with each encoder of the plurality of encoders.

7. The method of claim 1, wherein one encoder of the plurality of encoders is a generic encoder.

8. A system comprising:

a processor; and

a computer-readable storage device having instructions stored which, when executed by

the processor, cause the processor to perform operations comprising;

receiving data comprising a plurality of data portions, wherein a respective data portion of the plurality of data portions is chronologically distinct from other data portions of the plurality of data portions;

identifying, via a processor, a classification parameter for the respective data portion;

classifying the respective data portion into a respective content classification according to the classification parameter for the respective data portion;

encoding the respective data portion using a respective encoder from a plurality of encoders according to the respective content classification, to yield encoded data; and

multiplexing the encoded data with an encoded filter description.

9. The system of claim 8, wherein the computer-readable storage device stores additional instructions which, when executed by the processor, cause the processor to perform operations further comprising:

identifying filters associated with the respective data portion, to yield a filter descriptor; and

encoding the filter description, to yield the encoded filter description.

10. The system of claim 9, wherein the data comprises video data.

11. The system of claim 9, wherein the respective content classification comprises at least one of a person, an object, an action, a location, a time scene change, a color, a region of interest, a local texture, a human face, and a global motion.

12. The system of claim 9, wherein each encoder of the plurality of encoders is associated with at least one encoding parameter.

13. The system of claim 12, wherein the computer-readable storage device stores additional instructions which, when executed by the processor, cause the processor to perform operations further comprising:

determining, prior to encoding the data, which encoder of the plurality of encoders best corresponds to the respective data portion, according to a comparison of the classification parameter for the respective data portion to the at least one encoding parameter associated with each encoder of the plurality of encoders.

14. The system of claim 9, wherein one encoder of the plurality of encoders is a generic encoder.

15. A computer-readable storage device having instructions stored which, when executed by a computing device, cause the computing device to perform operations comprising:

receiving data comprising a plurality of data portions, wherein a respective data portion of the plurality of data portions is chronologically distinct from other data portions of the plurality of data portions;

identifying, via a processor, a classification parameter for the respective data portion;

classifying the respective data portion into a respective content classification according to the classification parameter for the respective data portion;

encoding the respective data portion using a respective encoder from a plurality of encoders according to the respective content classification, to yield encoded data; and

multiplexing the encoded data with an encoded filter description.

16. The computer-readable storage device of claim 15, wherein the computer-readable storage device stores additional instructions which, when executed by the computing device, cause the computing device to perform further operations comprising:

identifying filters associated with the respective data portion, to yield a filter descriptor; and

encoding the filter description, to yield the encoded filter description.

17. The computer-readable storage device of claim 15, wherein the data comprises video data.

18. The computer-readable storage device of claim 15, wherein the respective content classification comprises at least one of a person, an object, an action, a location, a time scene change, a color, a region of interest, a local texture, a human face, and a global motion.

19. The computer-readable storage device of claim 15, wherein each encoder of the plurality of encoders is associated with at least one encoding parameter.

20. The computer-readable storage device of claim 19, wherein the computer-readable storage device stores additional instructions which, when executed by the computing device, cause the computing device to perform further operations comprising:

determining, prior to encoding the data, which encoder of the plurality of encoders best corresponds to the respective data portion, according to a comparison of the classification parameter for the respective data portion to the at least one encoding parameter associated with each encoder of the plurality of encoders.