SIGNAL PROCESSING APPARATUS AND CONTROL METHOD THEREOF

• US 20090059077A1
• Filed: 01/31/2008
• Published: 03/05/2009
• Est. Priority Date: 08/27/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Cha, Tae-hwan
• Granted Patent: US 8,760,581 B2
• Time in Patent Office: Days
• US Class Current: 348/627
• CPC Class Codes: G06T 2207/10016 Video; Image sequence
• CPC Class Codes: G06T 5/002 Denoising; Smoothing noise processing or correction adapted to be used in an image pickup device containing and electronic image sensor H04N23/81, H04N25/60 - H04N25/67
• CPC Class Codes: G06T 5/20 using local operators
• CPC Class Codes: G06T 5/70 Denoising; Smoothing
• CPC Class Codes: H04N 5/208 for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
• CPC Class Codes: H04N 5/21 Circuitry for suppressing or minimising disturbance, e.g. moiré or halo

Abstract

There are provided a signal processing apparatus and a control method thereof. The signal processing apparatus includes: a noise detecting unit which detects a signal-to-noise ratio of an input video signal; a coring unit which performs coring to remove a component of the video signal having a level within a predetermined reference range; and a control unit which adjusts the reference range of the coring unit corresponding to the detected signal-to-noise ratio and controls the coring unit to core the video signal based on the adjusted reference range.

Claims

1. A signal processing apparatus comprising:

a noise detecting unit which detects a signal-to-noise ratio of an input video signal;

a coring unit which performs coring to remove a component of the input video signal having a level within a reference range; and

a control unit which adjusts the reference range of the coring unit according to the detected signal-to-noise ratio and controls the coring unit to core the video signal based on the adjusted reference range.

2. The signal processing apparatus according to claim 1, wherein the control unit adjusts the reference range based on a change in the signal-to-noise ratio.

3. The signal processing apparatus according to claim 2, further comprising a storing unit in which a plurality of reference ranges corresponding to a plurality of signal-to-noise ratios are stored, wherein the control unit recognizes the reference range, among the plurality of stored reference ranges, corresponding to the detected signal-to-noise ratio, among the plurality of signal-to-noise ratios, to adjust the reference range of the coring unit.

7. The signal processing apparatus according to claim 2, wherein if the change in the signal-to-noise ratio is an increase, the control unit adjusts the reference range to be narrower.

8. The signal processing apparatus according to claim 2, wherein if the change in the signal-to-noise ratio is a decrease, the control unit adjusts the reference range to be wider.

4. A control method of a signal processing apparatus comprising a coring unit which performs coring to remove a component of an input video signal having a level within a reference range, the method comprising:

detecting a signal-to-noise ratio of the input video signal;

adjusting the reference range of the coring unit according to the detected signal-to-noise ratio; and

coring the input video signal based on the adjusted reference range.

5. The method according to claim 4, the reference range is adjusted based on a change in the signal-to-noise ratio.

6. The method according to claim 5, further comprising storing a plurality of reference ranges corresponding to a plurality of signal-to-noise ratios,

wherein the adjusting the reference range comprises:

recognizing the reference range, among the plurality of stored reference ranges, corresponding to the detected signal-to-noise ratio, among the plurality of signal-to-noise ratios; and

adjusting the reference range of the coring unit based on the recognized reference range.

9. The method according to claim 5, wherein if the change in the signal-to-noise ratio is an increase, the adjusting the reference range comprises adjusting the reference range to be narrower.

10. The method according to claim 5, wherein if the change in the signal-to-noise ratio is a decrease, the adjusting the reference range comprises adjusting the reference range to be wider.