Video signal processing apparatus, video signal processing method and video source determining method
A video signal processing and video signal technology, which is applied in the field of video signal processing device, video signal processing and video source judgment, can solve the problems of poor judgment accuracy, output video signal cannot display good image on TV receiver, etc., and improve signal graphics The effect of the probability of
Inactive Publication Date: 2007-01-03
SONY CORP
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[0009] However, since the conventional video signal processing apparatus provided with the scanning line doubling device is configured as above, there is a problem that if the determination accuracy of the signal source of the input video signal is poor, or the output video signal is not selected according to the type of the determined video source, If there is an appropriate scanning method, there is a problem that a good image cannot be displayed on a television receiver based on the output video signal obtained from the scanning line doubling device
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[0034] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0035] Embodiment 1
[0036] image 3 It is a block diagram showing a video signal processing apparatus according to Embodiment 1 of the present invention. image 3 Among them, 1 is the input terminal for inputting the video signal, 2 is the first field memory for inputting the video signal and delaying the time required to input the video signal of one field in input terminal 1, and 3 is the inputting video signal and delaying it in The second field memory is output after the time required to input the video signal of one field in the input terminal 1, and 4 has 2 input units and 1 output unit and selectively outputs the input in a certain input unit according to the control signal. The switching circuit of the video signal, 5 is the scanning line doubling device (scanning line doubling device) that inputs 3 video signals to generate the field with 2 times the number...
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There is provided a video signal processing apparatus that makes it possible to realize a favorable display of pictures by increasing the detection accuracy of the video source of an input video signal and by using an appropriate scanning method for an output video signal in accordance with the determined type of video source. The video signal processing apparatus includes video source determining means for determining whether the video source of a video signal is a film source, calculating means for calculating a degree of difference between a picture of a field of the video signal and a picture of a field of a delayed video signal, threshold setting means, comparison means for comparing the degree of difference and a threshold and determining whether the pictures of each field match, and a signal pattern detecting means for detecting a signal pattern of a signal outputted by the comparison means and determining whether the video source is a film source, with the threshold setting means outputting respectively different thresholds in a state where the video source is determined to be a film source and a state where the video source is not determined to be a film source.
Description
technical field [0001] The present invention relates to a video signal processing device capable of high-resolution video display and a video signal processing method, in particular to changing the output video according to the type of video source while doubling the scanning lines of the field provided by the video signal to increase the resolution. A video signal processing device and a video signal processing method in a scanning mode of a signal. Background technique [0002] Conventionally, as one method of improving the image quality of a video signal supplied by the NTSC method or the PAL method, a method of increasing the number of scanning lines in the vertical direction per field to improve the vertical resolution of the image is known. In a scanning line doubling device (scanning line doubling device) that performs such processing, three video signals are input to generate a video signal in which the scanning lines are doubled. [0003] In the scanning line doubl...
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IPC IPC(8): H04N7/01H04N5/44
CPCH04N7/012Y10S348/911H04N7/0112H04N7/01
Inventor 德原正春猿乐寿雄金子直树今井圣子
Owner SONY CORP