Zooming apparatus and method in digital TV
First Claim
1. A vertical zooming apparatus for an image comprising:
- a line memory unit which includes at least one line memory and which stores input image data by each memory line;
an input data controller which stores the input image data in the line memory unit according to the image type and zoom magnification;
a zoom controller which receives an area information to be zoomed and a zoom magnification from a user, said zoom controller controlling the storage of the input image data in the line memory unit by outputting a first control signal to the data controller and controlling the processing of the stored data; and
a data processor which produces a zoomed image using the stored image data in the line memory unit, according to the control of the zoom controller, wherein said data processor includes, a multiplication assembly including at least one multiplier, a divider assembly including at least one divider, a plurality of first multiplexers corresponding to the number of line memories in the line memory unit, each multiplexer receiving the input image data stored in a corresponding the line memory and outputting the received data to one of said multipliers, a second multiplexer selectively multiplexing the input image data through said at least one of the multipliers, according to the zoom magnification, and outputting multiplexed data, an adder adding the multiplexed data and outputting data sum to the divider assembly, and a third multiplexer selectively outputting a data sum divided through one of said at least one divider as a zoomed data.
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Abstract
An image zooming apparatus and method for zooming a specific portion of an image in a vertical direction for a digital TV is disclosed. The present apparatus includes a line memory unit for storing the input images; an input data controller for storing the input data in the line memory unit according to a type of the input image and zoom magnification; a zoom controller for receiving zoom area information and zoom magnification from a user, and controlling the data storage in the line memory unit and the processing of the stored data; and data processor for providing a zoomed image according to the control of the zoom controller. The present invention allows a user to zoom an image area of interest and re-zoom a zoomed image area of interest, thereby providing a user-friendly device.
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Citations
19 Claims
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1. A vertical zooming apparatus for an image comprising:
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a line memory unit which includes at least one line memory and which stores input image data by each memory line;
an input data controller which stores the input image data in the line memory unit according to the image type and zoom magnification;
a zoom controller which receives an area information to be zoomed and a zoom magnification from a user, said zoom controller controlling the storage of the input image data in the line memory unit by outputting a first control signal to the data controller and controlling the processing of the stored data; and
a data processor which produces a zoomed image using the stored image data in the line memory unit, according to the control of the zoom controller, wherein said data processor includes, a multiplication assembly including at least one multiplier, a divider assembly including at least one divider, a plurality of first multiplexers corresponding to the number of line memories in the line memory unit, each multiplexer receiving the input image data stored in a corresponding the line memory and outputting the received data to one of said multipliers, a second multiplexer selectively multiplexing the input image data through said at least one of the multipliers, according to the zoom magnification, and outputting multiplexed data, an adder adding the multiplexed data and outputting data sum to the divider assembly, and a third multiplexer selectively outputting a data sum divided through one of said at least one divider as a zoomed data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
a coefficient set having a plurality of coefficients;
a switch outputting a filter coefficient from the coefficient set based upon a line memory position of the input image data stored in the line memory unit; and
a vertical filter producing a zoomed image by combining the input image data stored in line memories of the line memory unit using the filter coefficient.
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9. In a digital television system, a vertical zooming method for an input image, the method comprising:
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(a) storing non-correspondingly lines of input image data into a plurality of line memories of a line memory unit according to the input image type having different display format and zoom magnification;
(b) receiving an area information to be zoomed and a zoom magnification from a user, and controlling the storage of the input image data in the line memory unit and controlling the processing of the stored data; and
(c) producing a zoomed image using the stored image data in the line memory unit, according to the control in the step (b). - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
storing a plurality of coefficients;
outputting a filter coefficient from the plurality of coefficients based upon a line memory position of the input image data stored in the line memory unit; and
producing a zoomed image through a vertical filter by combining the input image data stored in the line memories of the line memory unit using the filter coefficient.
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17. A digital TV comprising:
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a line memory unit which includes at least one line memory and which stores input image data by each memory line;
an input data controller which stores the input image data in the line memory unit according to the image type and zoom magnification;
a zoom controller which receives an area information to be zoomed and a zoom magnification from a user, said zoom controller controlling the storage of the input image data in the line memory unit by outputting a first control signal to the data controller and controlling the processing of the stored data, a data processor which produces a vertically zoomed image using the stored image data in the line memory unit, according to the control of the zoom controller, wherein said data processor includes, a multiplication assembly including at least one multiplier, a divider assembly including at least one divider, a plurality of first multiplexers corresponding to the number of line memories in the line memory unit, each multiplexer receiving the input image data stored in a corresponding the line memory and outputting the received data to one of said multipliers, a second multiplexer selectively multiplexing the input image data through said at least one of the multipliers, according to the zoom magnification, and outputting multiplexed data, an adder adding the multiplexed data and outputting data sum to the divider assembly, and a third multiplexer selectively outputting a data sum divided through one of said at least one divider as a zoomed data. - View Dependent Claims (18, 19)
a coefficient set having a plurality of coefficients;
a switch outputting a filter coefficient from the coefficient set based upon a line memory position of the input image data stored in the line memory unit; and
a vertical filter producing a zoomed image by combining the input image data stored in line memories of the line memory unit using the filter coefficient.
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Specification