Method for conversing image framel field frequency in video signal processing

Abstract

The method includes following steps: detecting input and output video signal and picking-up information; analyzing and determining logic operation mode from detected information, selecting suitable reading / writing operation state; determining specific reading and writing control signal; indicating reading / writing control standard interface module to carry out reading / writing operation through logic storage device; writing digital video image into storage device and reading out needed digital image from storage device. The invented method compatible to traditional method can adjust frame / field frequency, eliminate flicker phenomena, and ensuring integrated image.

Description

technical field [0001] The present invention relates to a method for transforming the frame / field frequency of the source video image into the required target image frame / field frequency, to be precise, relates to an image frame / field frequency transformation in video signal processing realized by storage control Methods. Background technique [0002] There are several reasons for transforming the image frame / field frequency of video signals: [0003] One is to make the video signal display frequency meet the needs of people's subjective feelings. Human eyes are quite sensitive to the subjective experience of video signals. For images with a display frequency lower than 50Hz, you can feel quite obvious picture flickering, which can easily cause eye fatigue. Therefore, in the scanning display method, the frame field frequency of the image is a very important index. [0004] The second is to meet the compatibility requirements for video signal processing under different vid...

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Problems solved by technology

[0008] Usually, the original AB two frame / field signal is repeated through ABAB or AABB. The target frequency that can be achieved by this method is very limited, which cannot meet the requirements of programming, and is not suitable for many occasions that require target frequency.

[0009] 2. Traditional frame / field transformation method

The read-write control of this method is based on a complete frame / field, and the judgment of read-write control is completely based on the current read-write status. Since the read-write control is mutually exclusive to the current frame / field signal, although this method can Realize the transformation of any purpose frequency, but its limitation is that there must be a perfect control mechanism for the read and write control signals. Since this method is based on a complete frame / field for adaptive judgment, it will inevitably lead to the signal source signal. A certain abandonment will result in low utilization of the signal source signal, and will have a serious impact on the continuity of the image

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