System and method of filtering noise

• US 8,090,032 B2
• Filed: 11/10/2009
• Issued: 01/03/2012
• Est. Priority Date: 06/05/2001
• Status: Expired due to Fees

• Current Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Inventors: Puri, Atul, Civanlar, Mehmet Reha
• Primary Examiner(s): DIEP, NHON THANH
• Application Number:
  US12/615,820
• Publication Number:
  US 20100054344A1
• Time in Patent Office: 784 Days
• Field of Search: None
• US Class Current: 375/240.29
• 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. The system and method are most applicable to removing noise in a bitstream wherein the bitstream is encoded after being segmented into portions based on predefined classifications or models. Based on the segment classifications, each segment or portion is encoded with a different encoder associated with the portion model and chosen from a plurality of encoders. The coded bit-stream for each segment includes information regarding which encoder was used to encode that segment. A circuit for removing noise in video content comprises 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. The third filter is connected in parallel with a third pass-through line, wherein the first output switch is connected to the second input switch and the second output switch is connected to the third input switch. The first input switch, first output switch, second input switch, second output switch, third input switch, and third output switch are controlled to either filter each video portion or not filter each video portion according to descriptors related to the video content.

Claims

1. A video segment scene assembler for assembling a video, the assembler comprising:

a processor;

a first module controlling the processor to receive video segments of a video, the video segments created by a first filter and a second filter connected in parallel, wherein each of the first filter and the second filter filters the video according to descriptors associated with the video; and

a second module controlling the processor to assemble the received video segments.

2. The video segment scene assembler of claim 1, wherein the first filter is connected to a first pass-through line.

3. The video segment scene assembler of claim 1, wherein the second filter is connected to a second pass-through line.

4. The video segment scene assembler of claim 1, wherein the video segments are created by a third filter, wherein the input and output of the third filter are controlled with the respective inputs and outputs of the first filter and the second filter to either filter each video segment or not filter each video segment according to descriptors related to the video.

5. The video segment scene assembler of claim 1, wherein the first filter is a blockiness removal filter.

6. The video segment scene assembler of claim 5, wherein the second filter is a ringing removal filter.

7. The video segment scene assembler of claim 4, wherein the first filter is a blockiness removal filter, the second filter is a ringing removal filter and the third filter is a noise smoothing filter.

8. The video segment scene assembler of claim 4, wherein the first filter is a blockiness removal filter, the second filter is a ringing removal filter and third filter is a noise rejection filter.

9. The video segment scene assembler of claim 1, wherein the video segments are created by a first plurality of filters in parallel with the first bypass line and wherein an output of the first plurality of filters and the first bypass line is connected to an input of the second filter and the second bypass line wherein for each video segment, filtering and bypassing is controlled according to descriptors related to content of each video segment.

10. The video segment scene assembler of claim 9, wherein the video segments are created by a plurality of third filters connects in parallel to a third bypass line and wherein an output of the second filter and second bypass line is connected to an input to the third plurality of filters and third bypass line, wherein for each video segment, filtering and bypassing is controlled according to descriptors related to the content of each video segment.

11. The video segment scene assembler of claim 9, wherein the first plurality of filters comprises blockiness removal filters.

12. The video segment scene assembler of claim 9, wherein the second filter is a ringing removal filter.

13. The video segment scene assembler of claim 10, wherein the third plurality of filters comprises a noise smoothing filter and a noise rejection filter.

14. A non-transitory computer-readable storage medium storing instructions which, when executed by a computing device, cause the computing device assemble a video, the instructions comprising:

receiving video segments of a video, the video segments created by a first filter and a second filter connected in parallel, wherein each of the first filter and the second filter filters the video according to descriptors associated with the video; and

assembling the received video segments.

15. The non-transitory computer-readable medium of claim 14, the instructions further comprising removing noise from the video segments using the first filter having a first bypass line and the second filter having a second bypass line.

16. The non-transitory computer-readable medium of claim 14, wherein assembling the received video segments further comprises decoding the received video segments by one of a generic decoder and a decoder chosen from a plurality of decoders, wherein each decoder of the plurality of the decoders is associated with a specific content model.

17. The non-transitory computer-readable medium of claim 16, wherein the video segments are created by steps further comprising:

filtering using or bypassing the first filter according to the decoder used to decode each video segment; and

filtering using or bypassing the second filter according to the decoder used to decode each video segment.

18. A method for assembling a video segment scene, the method causing a computing device to perform steps comprising:

receiving video segments of a video, the video segments created by a first filter and a second filter connected in parallel, wherein each of the first filter and the second filter filters the video according to descriptors associated with the video; and

assembling the received video segments.

19. The method of claim 18, the method further causing the computing device to remove noise from video by steps comprising:

receiving descriptors associated with each video segment, the descriptors being related to characteristics of each video segment; and

for each video segment of the video, determining whether to filter or bypass filtering based on the receipt descriptors for the respective video segment.

20. The method of claim 18, the method further causing the computing device to determine whether to filter or bypass filtering for a plurality of filters, each of the plurality of filters having a bypass line.