System and method of filtering noise

• US 9,602,699 B2
• Filed: 11/30/2011
• Issued: 03/21/2017
• Est. Priority Date: 06/05/2001
• Status: Active Grant

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Puri, Atul, Civanlar, Mehmet Reha
• Primary Examiner(s): DIEP, NHON THANH
• Application Number:
  US13/307,366
• Publication Number:
  US 20120134413A1
• Time in Patent Office: 1,938 Days
• US Class Current: 1/1
• 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 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 a video comprising a plurality of video portions, wherein the plurality of video portions are chronologically distinct within the video;

identifying, via a processor, a classification parameter for each video portion of the plurality of video portions;

classifying each video portion of the plurality of video portions into a respective content classification according to the classification parameter for each video portion;

identifying filters associated with each video portion in the plurality of video portions, to yield filter descriptors;

encoding the filter descriptions, to yield encoded filter descriptions;

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

multiplexing the encoded video with the encoded filter descriptions.

2. 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.

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

4. The method of claim 3, further comprising determining, prior to encoding the video, which encoder of the plurality of encoders best corresponds to each video portion of the plurality of video portions, according to a comparison of the classification parameter for each video portion to the at least one encoding parameter associated with each encoder of the plurality of encoders.

5. The method of claim 4, wherein one encoder of the plurality of encoders is a generic encoder.

6. The method of claim 1, further comprising multiplexing encoded video portions.

7. The method of claim 6, further comprising communicating multiplexed encoded video portions to a viewer.

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 a video comprising a plurality of video portions, wherein the plurality of video portions are chronologically distinct within the video;

identifying a classification parameter for each video portion of the plurality of video portions;

classifying each video portion of the plurality of video portions into a respective content classification according to the classification parameter for each video portion;

identifying filters associated with each video portion in the plurality of video portions, to yield filter descriptors;

encoding the filter descriptions, to yield encoded filter descriptions;

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

multiplexing the encoded video with the encoded filter descriptions.

9. The system of claim 8, 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.

10. The system of claim 8, wherein each encoder of the plurality of encoders is associated with at least one encoding parameter.

11. The system of claim 10, the computer-readable storage device having additional instructions stored which, when executed by the processor, cause the processor to perform operations comprising determining, prior to encoding the video, which encoder of the plurality of encoders best corresponds to each video portion of the plurality of video portions, according to a comparison of the classification parameter for each video portion to the at least one encoding parameter associated with each encoder of the plurality of encoders.

12. The system of claim 11, wherein one encoder of the plurality of encoders is a generic encoder.

13. The system of claim 8, the computer-readable storage device having additional instructions stored which, when executed by the processor, cause the processor to perform operations comprising multiplexing encoded video portions.

14. The system of claim 13, the computer-readable storage device having additional instructions stored which, when executed by the processor, cause the processor to perform operations comprising communicating multiplexed encoded video portions to a viewer.

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 a video comprising a plurality of video portions, wherein the plurality of video portions are chronologically distinct within the video;

identifying a classification parameter for each video portion of the plurality of video portions;

identifying filters associated with each video portion in the plurality of video portions, to yield filter descriptors;

encoding the filter descriptions, to yield encoded filter descriptions;

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

multiplexing the encoded video with the encoded filter descriptions.

16. 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.

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

18. The computer-readable storage device of claim 17, having additional instructions stored which, when executed by the computing device, cause the computing device to perform operations comprising determining, prior to encoding the video, which encoder of the plurality of encoders best corresponds to each video portion of the plurality of video portions, according to a comparison of the classification parameter for each video portion to the at least one encoding parameter associated with each encoder of the plurality of encoders.

19. The computer-readable storage device of claim 18, wherein one encoder of the plurality of encoders is a generic encoder.

20. The computer-readable storage device of claim 15, having additional instructions stored which, when executed by the computing device, cause the computing device to perform operations comprising multiplexing encoded video portions.