Information processing apparatus and method for detecting scene change

• US 20060029289A1
• Filed: 08/04/2005
• Published: 02/09/2006
• Est. Priority Date: 08/05/2004
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Obara, Eiki, Yamaguchi, Tatsuo
• Application Number:
  US11/196,729
• Publication Number:
  US 20060029289A1
• Time in Patent Office: Days
• US Class Current: 382/274
• CPC Class Codes: G06F 3/14 Digital output to display device ; Cooperation and interconnection of the display device with other functional units
• CPC Class Codes: H04N 5/147 Scene change detection
• CPC Class Codes: H04N 5/20 Circuitry for controlling amplitude response

Abstract

An information processing apparatus includes: an image processing unit that performs image processing for video data; and a detection unit that detects a scene change point where available to start or to cancel the image processing by the image processing unit based on a brightness signal in the video data having a value in a predetermined range.

Claims

1. An information processing apparatus comprising:

an image processing unit that performs image processing for video data; and

a detection unit that detects a scene change point where available to start or to cancel the image processing by the image processing unit based on a brightness signal in the video data having a value in a predetermined range.

2. The information processing apparatus according to claim 1, wherein the image processing unit is a black extension processing unit that performs black extension processing for the video data.

3. The information processing apparatus according to claim 2, wherein the detection unit detects the scene change point using only the brightness signal of the video data expanded by the black extension processing unit as the brightness signal having a value in the predetermined range.

4. The information processing apparatus according to claim 3, wherein the predetermined range is 0 to 25 IRE.

5. The information processing apparatus according to claim 1 wherein the detection unit includes calculation unit that calculates an area ratio of the brightness signal having a value in the predetermined range to the whole screen, and

wherein the detection unit detects that a point where the area ratio increases or decreases exceeding a predetermined percentage as the scene change point.

6. The information processing apparatus according to claim 5, wherein the predetermined percentage is 3%.

7. The information processing apparatus according to claim 5, wherein when the area ratio calculated by the calculation unit exceeds a predetermined value, the detection unit suppresses detection of the scene change point.

8. The information processing apparatus according to claim 7, wherein the predetermined value is 25%.

9. The information processing apparatus according to claim 7, wherein when the area ratio calculated by the calculation unit increases exceeding a second predetermined percentage, the detection unit cancels suppressing the detection of the scene change point.

10. The information processing apparatus according to claim 9, wherein the second predetermined percentage is 10%.

11. The information processing apparatus according to claim 1 further comprising a receiver that receives television broadcast program data,

wherein the video data is contained in the television broadcast program data received by the receiver.

12. A scene change detection method for an information processing apparatus having an image processing unit, the method comprising:

performing image processing for video data; and

detecting a scene change point where available to start or to cancel the image processing by the image processing unit based on a brightness signal in the video data having a value in a predetermined range.

13. The method according to claim 12 further comprising calculating an area ratio of the brightness signal having a value in the predetermined range to the whole screen,

wherein the scene change point is detected at a point where the area ratio increases or decreases exceeding a predetermined percentage.

14. The method according to claim 13, wherein when the calculated area ratio exceeds a predetermined value, the detection of the scene change point is suppressed.

15. The method according to claim 14, wherein when the calculated area ratio increases exceeding a second predetermined percentage, the suppressing the detection of the scene change point is canceled.