Apparatus and method for processing video signal

• US 7,492,380 B2
• Filed: 06/21/2005
• Issued: 02/17/2009
• Est. Priority Date: 06/30/2004
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Kamimura, Shigeki
• Primary Examiner(s): Tung; Kee M
• Assistant Examiner(s): SAMS, MICHELLE L
• Application Number:
  US11/156,550
• Publication Number:
  US 20060001774A1
• Time in Patent Office: 1,337 Days
• Field of Search: 345/581, 345/698, 345/699, 345/606
• US Class Current: 345/698
• CPC Class Codes: G06T 3/40 Scaling of whole images or parts thereof, e.g. expanding or contracting

Abstract

An apparatus for processing a video signal comprises receiving units for receiving video signals, filter units for repeating filtering processing in two or more times of generating a new pixel at a position at which adjacent pixels of the received video signal are mutually weighted by a ratio of roughly 3:1 and generating a new pixel at a position at which precedingly generated adjacent pixels are mutually weighted by a ratio of roughly 3:1, and selection units for respectively selecting a pixel to be extracted among pixels to be performed filtering processing in two or more times on the basis of a scaling ratio to discriminate a position of a pixel to be output.

Claims

1. An apparatus for processing a video signal, comprising:

a receiving unit which receives the video signal;

a filter unit which repeats two or more times a process of (i) generating a new pixel at a position at which adjacent pixels of the received video signal are mutually weighted by a ratio of roughly 3;

1 and (ii) generating a new pixel at a position at which precedingly generated adjacent pixels are mutually weighted by a ratio of roughly 3;

1; and

a selection unit which selects a pixel similar to a desired pixel among pixels processed two or more times by the filter unit on the basis of a scaling ratio to discriminate a position of a pixel to be output.

2. The apparatus for processing the video signal according to claim 1, further comprising:

a calculation unit which calculates the scaling ratio on the basis of the number of pixels of the video signal received by the receiving unit and the number of pixels to be output; and

a video display unit which makes a video display on the basis of the pixel selected by the selection unit,

wherein the selection unit selects a pixel similar to a desired pixel among pixels processed two or more times by the filter unit on the basis of the scaling ratio calculated by the calculation unit.

5. The apparatus for processing the video signal according to any one of claims 1-4, wherein the filter unit comprises;

a plurality of multi-staged first weighting filters which generate new pixels at positions at which horizontally adjacent pixels of the input video signal are mutually weighted by ratios of roughly 3;

1, respectively; and

a plurality of multi-staged second weighting filters which generate new pixels at positions at which vertically adjacent pixels of the input video signal are mutually weighted by ratios of roughly 3;

1, respectively,

wherein at least one of the plurality of multi-staged first weighting filters and the plurality of multi-staged second weighting filters generates the new pixels at positions at which the adjacent pixels of the input video signal are mutually weighted by a ratio of 3;

1.

6. The apparatus for processing the video signal according to claim 5, wherein the selection unit comprises;

a first selection unit which selects a pixel similar to a desired pixel respectively generated from the plurality of first weighting filters on the basis of the scaling ratio;

a second selection unit which selects a pixel similar to a desired pixel respectively generated from the plurality of second weighting filters on the basis of the scaling ratio; and

a compositing unit which composes the pixel selected by the first selection unit and the pixel selected by the second selection unit.

3. An apparatus for processing a video signal, comprising:

a receiving unit which receives a broadcast signal;

a processing unit which recovers a video signal from the broadcast signal received by the receiving unit;

a filter unit which repeats two or more times a process of (i) generating a new pixel at a position at which adjacent pixels of the received video signal are mutually weighted by a ratio of roughly 3;

1 and (ii) generating a new pixel at a position at which precedingly generated adjacent pixels are mutually weighted by a ratio of roughly 3;

1;

a calculation unit which calculates a scaling ratio to discriminate a position of a pixel to be output on the basis of the number of pixels of the video signal recovered by the processing unit and the number of pixels to be output;

a selection unit which selects a pixel similar to a desired pixel among pixels processed two or more times by the filter unit on the basis of the scaling ratio calculated by the calculation unit; and

a video display unit which makes a video display on the basis of the pixel selected by the selection unit.

4. The apparatus for processing the video signal according to claim 3, further comprising an output unit, instead of the video display unit, which outputs the pixel selected by the selection unit.

7. A method for processing a video signal, comprising:

receiving the video signal;

repeating a filtering process two or more times of (i) generating a new pixel at a position at which adjacent pixels of the received video signal are mutually weighted by a ratio of roughly 3;

1 and (ii) generating a new pixel at a position at which precedingly generated adjacent pixels are mutually weighted by a ratio of roughly 3;

1;

selecting a pixel similar to a desired pixel among pixels performed filtering processing in two or more times on the basis of a scaling ratio to discriminate a position of a pixel to be output on a display.

8. The method for processing the video signal according to claim 7, further comprising making a video display on the basis of the pixel selected, and wherein the receiving of the video signal comprises:

receiving a broadcast signal including the video signal; and

recovering the video signal from the received broadcast signal, and

wherein the selection of the pixel comprises;

calculating the scaling ratio on the basis of the number of pixels of the recovered video signal and the number of pixels to be output; and

selecting a pixel similar to a desired pixel among pixels preformed filtering processing in two or more times on the basis of the calculated scaling ratio.

9. The method for processing the video signal according to claim 8, further comprising outputting the selected pixel.

10. The method for processing the video signal according to claim 7, wherein the selecting a pixel comprises:

calculating the scaling ratio on the basis of the number of pixels of the received video signal and the number of pixels to be output; and

selecting a pixel similar to a desired pixel among pixels performed filtering processing in two or more times on the basis of the calculated scaling ratio.

11. The method for processing the video signal according to any one of claims 7-10, wherein the repeated filtering process comprises:

generating a new pixel at a position at which horizontally adjacent pixels of an input video signal are mutually weighted by a ratio of roughly 3;

1, by each of a plurality of multiple-staged first weighting filters; and

generating a new pixel at a position at which vertically adjacent pixels of an input video signal are mutually weighted by a ratio of roughly 3;

1, by each of a plurality of multiple-staged second weighting filters,

wherein at least one of the plurality of multiple-staged first weighting filters and the plurality of multiple-staged second weighting filters generates the new pixels at positions at which the adjacent pixels of the input video signal are mutually weighted by a ration of 3;

1.

12. The method for processing the video signal according to claim 11, wherein the selecting a pixel comprises:

first selecting of selecting a pixel similar to a desired pixel respectively generated from the plurality of first weighting filters on the basis of the scaling ratio;

second selecting of selecting a pixel similar to a desired pixel respectively generated from the plurality of second weighting filters on the basis of the scaling ratio; and

composing the pixel selected by the first selecting and the pixel selected by the second selecting with each other.