Detector for detecting bad editing of image signal

A detection device and editing technology, applied in the field of detection circuits, can solve the problems of TV image jaggedness, image output jaggedness, etc.

Inactive Publication Date: 2005-08-10
SUNPLUS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the aforementioned method can effectively detect whether the image source is a film signal and achieve a perfect multiplier output, however, poor editing of the film data will cause damage to the 3:2 pull down ratio, resulting in jagged image output, as shown in the figure Fields 1-8 shown in 5 are from movie fragment A, while fields 9-16 are from movie fragment B. Due to the bad editing of movie fragment B, after field 9, it no longer conforms to the ratio of 3:2 pull down , and please refer to Fig. 4, since the film detection state transition diagram needs to be in the field 11 to judge the need to jump out of the film mode, therefore, when the output frame is generated based on the field 9, the original does not belong

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  • Detector for detecting bad editing of image signal
  • Detector for detecting bad editing of image signal
  • Detector for detecting bad editing of image signal

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Embodiment Construction

[0033] FIG. 6 shows a preferred embodiment of the detection device for detecting bad editing of the present invention, which includes the following elements: field buffers 61, 62, 63 and 64, frame motion detector 65, film detector 66, Bad edit detector 67 , line frequency multiplier 68 , multiplexers 691 and 692 and counter 693 . The field buffers 61, 62, 63 and 64 are used to temporarily store the odd and even fields continuously input in time, wherein the buffer 62 stores the currently output field f1, and the field buffers 64, 63, and 61 are used to respectively store the next two fields f3, the next field f2, and the previous field f0 in time, and the line multiplier 68 will generate an output frame based on the field f1.

[0034] The aforementioned frame motion detector 65 is used to compare whether the field f0 and the field f2 are the same, that is, to detect whether two consecutive odd or two consecutive even fields are the same, and output '0 if they are the same ', ...

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Abstract

The device is in use for sensing TV image signal. When it is detected that source of TV image is from movie signal and not from video signal, deinterleaving process can be carried out for signal in movie mode by line multiplier directly in order to increase vertical resolution of TV image signal so that saw-toothed TV image caused by poor edited image signal will not create. The invention can detect poor edited image signal before it is played so as to prevent saw-toothed image created.

Description

technical field [0001] The present invention relates to a detection circuit, especially a detection device suitable for detecting whether there is bad editing of image signals. Background technique [0002] Due to the limitation of transmission bandwidth, the current transmission of TV images adopts the method of interactive transmission of odd / even image fields. As shown in FIG. 1 , odd fields 10 and 12 have only odd lines of image data, while even display fields 11 and 13 have only even lines of image data. Due to the improvement of the vertical resolution of the new generation TV, a line doubler (line doubler) is needed inside the TV to perform frequency doubling processing to improve the vertical resolution. Among them, the simplest frequency doubling process is to directly combine adjacent odd and even fields to form a progressive scan frame. However, since the adjacent odd and even fields have time differences, directly combining the odd and even fields to generate s...

Claims

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Application Information

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IPC IPC(8): H04N5/14
Inventor 吕志明
Owner SUNPLUS TECH CO LTD
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