Apparatus and method for processing video signal

• US 20060001774A1
• Filed: 06/21/2005
• Published: 01/05/2006
• Est. Priority Date: 06/30/2004
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Kamimura, Shigeki
• Granted Patent: US 7,492,380 B2
• Time in Patent Office: Days
• US Class Current: 348/581
• 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 of processing 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

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

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

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

a second selection unit which selects any of each 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 of processing of generating a new pixel at a position at which adjacent pixels of the recovered 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;

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 to be extracted 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:

a receiving step of receiving the video signal;

a filtering step of repeating filtering processing 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;

a selection step of selecting a pixel to be extracted 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.

8. The method for processing the video signal according to claim 7, further comprising a display step of making a video display on the basis of the pixel selected in the selection step,

wherein the receiving step comprises:

receiving a broadcast signal including the video signal; and

recovering the video signal from the received broadcast signal,

wherein the selection step 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 to be extract 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 an output step, instead of the display step, of outputting the selected pixel.

10. The method for processing the video signal according to claim 7, wherein the selection step 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 to be extracted 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 filtering step 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.

12. The method for processing the video signal according to claim 11, wherein the selection step comprises:

first selecting of selecting any one of each pixel respectively generated from the plurality of first weighting filters on the basis of the scaling ratio;

second selecting of selecting any one of each 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.