System and Method of Filtering Noise

• US 20100054344A1
• Filed: 11/10/2009
• Published: 03/04/2010
• Est. Priority Date: 06/05/2001
• Status: Active Grant

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Civanlar, Mehmet Reha, Puri, Atul
• Granted Patent: US 8,090,032 B2
• Time in Patent Office: Days
• US Class Current: 375/240.290
• 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 device for decoding a bitstream, the bitstream divided into portions wherein each portion has a portion descriptor, the device comprising:

means for receiving descriptors associated with each bitstream portion;

means for filtering or bypassing filtering according to the received descriptors for each bitstream portion.

2. The device of claim 1, further comprising:

a first filter and a second filter, and wherein the means for filtering further comprises;

means for filtering using the first filter bypassing the first filter according to the received descriptors for each bitstream portion; and

means for filtering using the second filter or bypassing the second filter according to the received descriptors for each bitstream portion.

3. The device of claim 1, wherein the bitstream comprises at least video content.

4. The device of claim 1, wherein the portion descriptor identifies an encoder that encoded the respective portion from one of a plurality of encoders based on a portion model.