Video signal compensation apparatus for television receiver
AssigneeGoldstart Co., Ltd.
InventorSung U. Choi
Life of this patent
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Abstract
A video signal compensation apparatus for a television receiver which is capable converting a received video signal having a first aspect ratio to a second aspect ratio. The received video signal having the first aspect ratio is written in a memory field-by-field, and the video signal stored in the memory is read line-by-line . The pixel information therein line interpolated and output video signals are generated having a aspect ratio, thereby enabling the received video signal having the first aspect ratio to be displayed on television receiver having the second aspect ratio without distortion.
Claims13
A video signal compensation apparatus for a television receiver, comprising:
- field signal output means for generating two field signals which have opposite logic levels per each field, in response to a vertical synchronization signal of a received analog video signal which has a first aspect ratio;
- address counter means for generating a write address for the writing of a video signal, utilizing said vertical synchronization signal and a system sampling pulse;
- A/D converting means for converting the received analog video signal into a digital video signal, utilizing the sampling pulse;
- read/write control means for generating a read signal and a write signal for memorization, utilizing the two field signals and the system sampling pulse;
- read address generating means for generating a read address, line-by-line, which is suitable for a second aspect ratio, utilizing the write address;
- address switching means for selectively passing the write address and the read address, in response to said two field signals;
- field memory means for storing the digital video signal field-by-field and for reading the stored video signal line-by-line, thereby pixel-interpolating the stored digital video signal;
- data switching means for outputting the pixel-interpolated interpolated digital video signal from the field memory means, line-by-line, or inputting the digital video signal from the A/D converting means to the field memory means, field-by-field, in response to said two field signals;
- line compensation-operation means for performing an addition operation with a video signal which is inputted line-by-line via the data switching means, thereby to line-interpolate a video signal suitably to the second aspect ratio;
- and
- output means for outputting the line video signals from the line compensation-operation means in an established order which is suitable to the second aspect ratio.
Dependencies are inferred from the claim text.