Method and system for reducing shooting background noises of camera

Abstract

A method for reducing shooting background noises of a camera is applied to a system with a main chip and the camera which are mutually connected. The method comprises the following steps: 1, setting a clock signal phase A at a main chip receiving end and a clock signal phase B at a camera transmitting end, wherein X is a permissible phase deviation maximum value; 2, performing phase matching operation on the clock signal phase A at the receiving end and the clock signal phase B at the camera transmitting end, if a matching difference result is smaller than X, entering a step 4, otherwise, entering a step 3; 3, equally dividing the signal phase B at the receiving end according to all-phase 360 degrees and setting as n, namely B1, B2, ..., Bn, performing matching operation on equally divided phase signals of the clock signal phase A at the receiving end and the clock signal phase B at the camera transmitting end till the matching difference is the minimum, and if the matching difference value is smaller than X, A is equal to By and y is equal to 1, 2, 3, ..., n; and 4, ending, and entering a normal shooting process. By the method and the system, the noises are reduced by adjusting the phase matching degree of clock signal input and clock signal output, thus improving the shooting effect of the camera.

Description

technical field [0001] The present invention relates to a terminal device photographing technology, in particular to a method and system for reducing background noise of a camera photographing. Background technique [0002] In the prior art, it is mostly about the improvement of the camera module itself, and the addition of corresponding filter circuits to solve the noise problem of camera photography. The improvement of the camera module process and the addition of corresponding filter circuits will inevitably lead to an increase in cost and occupy a corresponding PCB space, resulting in unnecessary cost increases and layout restrictions. [0003] At present, regardless of whether it is a camera with a CPU interface or a MIPI interface, the wiring must be controlled accordingly so that there will be no amplitude or phase deviation during signal transmission, thereby avoiding corresponding signal shifts that cause the camera to take pictures When the background noise is too...

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Problems solved by technology

[0002] In the prior art, it is mostly about the improvement of the camera module itself, and the addition of corresponding filter circuits to solve the noise problem of camera photography. The improvement of the camera module process and the addition of corresponding filter circuits will inevitably lead to an increase in cost and occupy a corresponding PCB space, resulting in unnecessary cost increases and layout constraints

[0003] At present, regardless of whether it is a camera with a CPU interface or a MIPI interface, the wiring must be controlled accordingly so that there will be no amplitude or phase deviation during signal transmission, thereby avoiding corresponding signal shifts that cause the camera to take pictures When the background noise is too large, it will affect the image quality

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