Image signal processing apparatus
A video signal processing and video signal technology, applied in the direction of cathode ray tube indicators, standard conversion, instruments, etc., can solve the problems of image definition loss and high cost, and achieve the effect of achieving brightness level
Inactive Publication Date: 2007-10-03
SANYO ELECTRIC CO LTD
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Problems solved by technology
In order to suppress the occurrence of the above-mentioned troubles, if complex change detection processing is adopted, the system as a whole will be highly functional, but for example, a frame-by-frame memory is required, and the cost becomes higher as the memory increases
For a two-dimensional digital filter that suppresses the cost, although the cost can be suppressed relatively low, due to the interpolation in the two-dimensional field, the interpolated image has the problem of loss of clarity
Method used
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[0029] Preferred embodiments of the present invention, not intended to be limiting, are shown in the following drawings by way of example only.
[0030] In the following paragraphs, some embodiments of the present invention are described as examples, but the present invention is not limited thereto. It should be considered that those skilled in the art can make various other modifications based on the disclosure of this invention and on the basis of these illustrated embodiments.
[0031] Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a video signal processing circuit according to an embodiment of the present invention. Input video signal data as a digital video signal is input to the line memory 1 . WCK, which is a write clock, is supplied from the memory light control circuit 2 to the line memory 1 . The memory light control circuit 2 is supplied with a horizontal synchronization signal HS...
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According to preferred embodiments of the present invention, an image signal processing apparatus for converting an interlace signal which creates a frame image by alternately displaying an odd field and an even field on a single screen into a progressive signal, includes a line memory for storing the interlace signal, a writing / reading portion for writing / reading the interlace signal into / from the line memory, a signal generation portion for generating a prescribed signal, a selector for selectively outputting the interlace signal from the line memory or the prescribed signal from the signal generation portion, and a controller for controlling signal selection by the selector. The controller controls the selector such that, when the odd field of the interlace signal is being read from the line memory, the interlace signal is outputted from the line memory to odd lines of a progressive signal to be converted and the prescribed signal is outputted from the signal generation portion to even lines of the progressive signal, and when the even field of the interlace signal is being read from the line memory, the interlace signal is outputted from the line memory to even lines of the progressive signal and the prescribed signal is outputted from the signal generation portion to odd lines of the progressive signal.
Description
technical field [0001] The present invention relates to a method for converting an interlaced video signal for displaying video on a screen such as a cathode ray tube to a progressive video signal for displaying video on a screen such as an LCD-TV or plasma-TV. A video signal processing device for a video signal of the type. Background technique [0002] The following descriptions illustrate the inventor's understanding of the related technology and its problems, and should not be interpreted as the inventor's own prior art. [0003] The so-called interlaced type refers to scanning from the top of the screen along odd-numbered scan lines to the bottom of the screen, and then returning to the top to scan along even-numbered scan lines when displaying a frame of image on a TV or monitor. Go to the bottom of the screen, that is, scan in two steps. In addition, the progressive method means that the scanning from the uppermost part of the screen to the lowermost part of the scr...
Claims
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IPC IPC(8): H04N7/01G09G5/00
Inventor 千田和则龟井三十九
Owner SANYO ELECTRIC CO LTD