WO2017049949A1

WO2017049949A1 - Analog/digital signal compensation method and apparatus

Info

Publication number: WO2017049949A1
Application number: PCT/CN2016/084290
Authority: WO
Inventors: 李佳; 曹芝勇
Original assignee: 深圳Tcl数字技术有限公司
Priority date: 2015-09-25
Filing date: 2016-06-01
Publication date: 2017-03-30
Also published as: CN105141934B; CN105141934A

Abstract

Disclosed are an analog/digital signal compensation method and apparatus. The method comprises: after a terminal performs white balance adjustment on a first signal source, obtaining a white balance parameter of the first signal source of the terminal; determining whether a green-primary-color gain value in the white balance parameter is less than a first threshold corresponding to the first signal source; when the green-primary-color gain value is less than the first threshold, increasing the green-primary-color gain value to the first threshold, to obtain a first green-primary-color gain value, and increasing a red-primary-color gain value and a blue-primary-color gain value of the white balance parameter by a multiple which is a first numerical value, to obtain the first red-primary-color gain value and a first blue-primary-color gain value, the first numerical value being the ratio of the first threshold to the green-primary-color gain value; and setting the first green-primary-color gain value, the first red-primary-color gain value, and the first blue-primary-color gain value as a white balance parameter of a second signal source of the terminal. By means of the present invention, there is no need to perform a time-consuming and inefficient white balance adjustment process on all signal sources by a factory, and it is ensured that the terminal can successfully pass an energy-consumption test.

Description

Method and device for analog signal compensation

Technical field

The present invention relates to the field of image display technologies, and in particular, to a method and apparatus for analog-digital signal compensation.

Background technique

White balance is produced by the reproduction of color in electronic images. A series of problems with color reproduction and tone processing can be solved by white balance adjustment. Since there are hardware and software differences between the displays of different terminals, especially TV terminals, if all the TV terminals use the same white balance parameters, it is easy to produce color cast, which affects the display quality of the terminal. Therefore, in the production process of the television terminal, the factory often needs to adjust the white balance parameters of each television terminal to achieve better color reproduction and image quality improvement.

In the production process of the television terminal, there are two ways to adjust the white balance parameter of the television terminal: one is to adjust the white balance parameters of all the signal sources of the television terminal one by one, but this method is very time consuming, and the white balance parameter is adjusted. Inefficient; the other is to only adjust digital signals (such as HDMI signals (High Definition Multimedia Interface, high-definition multimedia interface)) or only adjust the white balance parameter of the analog signal, and then all the other sources use the same white balance parameter as the digital signal or analog signal, but according to the brightness formula (for example, under the analog signal: Y1 =0.3R+0.6G+0.1B; under the digital signal: Y2=0.21R+0.72G+0.07B, where Y1 is the brightness under the analog signal, Y2 is the brightness under the digital signal, and R is the red base color gain value, G For the green base gain value, B is the blue base color gain value), the same white balance parameter, the resulting analog signal and the digital signal brightness are different, may cause the analog signal or digital signal to be dark, resulting in the TV terminal Can not pass the energy test.

Summary of the invention

The main object of the present invention is to provide a method and device for analog-digital signal compensation, which aims to solve the technical problem that adjusting the white balance parameter of the television terminal takes a long time and is inefficient, resulting in the TV terminal being unable to test.

The invention provides a method for analog signal compensation, the first signal source is a digital signal source, the second signal source is an analog signal source, and the analog signal compensation method comprises:

After the terminal performs white balance adjustment on the first signal source, acquiring a white balance parameter of the first signal source of the terminal, where the white balance parameter includes a green primary color gain value, a red primary color gain value, and a blue primary color gain value;

Determining whether the green primary color gain value in the white balance parameter is smaller than a first threshold corresponding to the first signal source, wherein the first threshold is determined based on a preset brightness formula;

When the green primary color gain value is less than the first threshold, increasing the green primary color gain value to the first threshold value, and increasing the red primary color gain value and the blue primary color gain value of the white balance parameter by a first numerical multiple, the first numerical multiple a ratio of the first threshold value to the green primary color gain value; wherein the increased green primary color gain value is used as the first green primary color gain value and the increased red primary color gain value is used as the first red primary color gain value, and is increased. The blue primary color gain value is used as the first blue primary color gain value;

Determining whether the first red primary color gain value is smaller than a second threshold corresponding to the first signal source;

When the first red primary color gain value is less than the second threshold, increasing the first red primary color gain value to a second threshold, wherein the increased first red primary color gain value is used as the second red primary color gain value;

And increasing a first blue primary color gain value by a second numerical multiple, the second numerical value being a ratio of the second threshold value to the first red primary color gain value, wherein the increased first blue primary color gain value is used as the second blue primary color gain value ;

And setting a white balance parameter of the second source of the terminal according to the first green primary color gain value, the second red primary color gain value, and the second blue primary color gain value.

Preferably, the step of setting the white balance parameter of the second source of the terminal according to the first green primary color gain value, the second red primary color gain value, and the second blue primary color gain value comprises:

Determining whether the second red primary color gain value is greater than a red gain extreme value corresponding to the first signal source;

When the second red primary color gain value is greater than the red gain extreme value corresponding to the first signal source, reducing the second red primary color gain value to the red gain extreme value to obtain the third red primary color gain value;

The first green primary color gain value, the third red primary color gain value, and the second blue primary color gain value are set to a white balance parameter of the second source of the terminal.

Preferably, after the step of determining whether the second red primary color gain value is greater than the red gain extreme value corresponding to the first signal source, the method further includes:

When the second red primary color gain value is less than or equal to the red gain extreme value corresponding to the first signal source, setting the first green primary color gain value, the second red primary color gain value, and the second blue primary color gain value as the terminal second signal source White balance parameters.

Preferably, the method for modulating the analog signal further comprises:

Detecting, according to the chrominance system, whether the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the terminal second signal source is color cast;

Adjusting the first threshold, the second threshold, and/or the red gain pole if the image formed by the green primary gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the terminal second signal source is color cast The value is adjusted to adjust the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter set to the terminal second signal source.

Preferably, the method for modulating the analog signal further comprises:

To achieve the above object, the present invention provides a method for analog-digital signal compensation, and a method for analog-digital signal compensation includes:

Determining whether the green primary color gain value in the white balance parameter is smaller than a first threshold corresponding to the first signal source;

When the green primary color gain value is less than the first threshold, increasing the green primary color gain value to the first threshold value, and increasing the red primary color gain value and the blue primary color gain value of the white balance parameter by a first numerical multiple, the first numerical multiple a ratio of the first threshold to the green primary gain value;

The white balance parameter of the second source of the terminal is set according to the increased green primary color gain value, the red primary color gain value, and the blue primary color gain value.

Preferably, the increased green primary color gain value is used as the first green primary color gain value and the increased red primary color gain value as the first red primary color gain value and the increased blue primary color gain value as the first blue primary color gain value. The value, the step of setting the white balance parameter of the second source of the terminal according to the increased green primary color gain value, the red primary color gain value, and the blue primary color gain value includes:

Preferably, the method for modulating the analog signal further comprises:

To achieve the above object, the present invention also provides an apparatus for analog-digital signal compensation, and the apparatus for analog-digital signal compensation includes:

The parameter obtaining module is configured to obtain a white balance parameter of the first signal source of the terminal after the terminal performs white balance adjustment on the first signal source, where the white balance parameter includes a green primary color gain value, a red primary color gain value, and a blue primary color gain value. ;

a determining module, configured to determine whether a green primary color gain value in the white balance parameter is smaller than a first threshold corresponding to the first signal source;

And increasing the module, when the green primary color gain value is less than the first threshold, increasing the green primary color gain value to the first threshold, and increasing the red primary color gain value and the blue primary color gain value of the white balance parameter by a first numerical multiple The first numerical multiple is a ratio of the first threshold value to the green primary color gain value;

And a parameter setting module, configured to set a white balance parameter of the second source of the terminal according to the increased green primary color gain value, the red primary color gain value, and the blue primary color gain value.

Preferably, the increased green primary color gain value is used as the first green primary color gain value and the increased red primary color gain value as the first red primary color gain value and the increased blue primary color gain value as the first blue primary color gain value. Value, parameter setting module includes:

a gain value determining unit, configured to determine whether the first red primary color gain value is smaller than a second threshold corresponding to the first signal source;

a first gain increasing unit, configured to increase a first red primary color gain value to a second threshold when the first red primary color gain value is less than a second threshold, wherein the increased first red primary color gain value is used as a second Red primary color gain value;

a second gain increasing unit, configured to increase a first blue primary color gain value by a second numerical multiple, the second numerical value being a ratio of the second threshold value to the first red primary color gain value, wherein the increased first blue primary color a gain value as a second blue primary color gain value;

And a parameter setting unit, configured to set a white balance parameter of the second signal source of the terminal according to the first green primary color gain value, the second red primary color gain value, and the second blue primary color gain value.

Preferably, the parameter setting unit comprises:

a ratio determining unit, configured to determine whether the second red primary color gain value is greater than a red gain extreme value corresponding to the first signal source;

a first secondary setting unit, configured to reduce a second red primary color gain value to a red gain extreme value to obtain a third red primary color gain when the second red primary color gain value is greater than a red gain extreme value corresponding to the first signal source And setting a first green primary color gain value, a third red primary color gain value, and a second blue primary color gain value to a white balance parameter of the second source of the terminal.

Preferably, the number setting unit further comprises:

a second secondary setting unit, configured to: when the second red primary color gain value is less than or equal to a red gain extreme value corresponding to the first signal source, the first green primary color gain value, the second red primary color gain value, and the second blue primary color The gain value is set to the white balance parameter of the second source of the terminal.

Preferably, the device for analog signal compensation further comprises:

a color cast detection module, configured to detect, according to the chroma system, whether the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter set as the second source of the terminal is color cast; if set, Adjusting the first threshold, the second threshold, and/or the red gain extreme value by performing color cast on the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the second source of the terminal Adjust the green primary color gain value, the red primary color gain value, and the blue primary color gain value set to the white balance parameter of the second source of the terminal.

When detecting that the white balance parameter of the first signal source is unreasonable, the white balance parameter is adjusted, and finally the adjusted white balance parameter is used as the white balance parameter of the second signal source, thereby ensuring the second signal source. Under the premise of outputting the brightness of the image, the adjustment of the white balance parameter of the second signal source is automatically realized, without the need for the factory to perform a time-consuming and inefficient white balance adjustment process on the second signal source of the terminal, and also ensuring that the display brightness of the terminal is not It is small and can pass the energy consumption test smoothly.

DRAWINGS

1 is a schematic flow chart of a first embodiment of a method for compensating analog-digital signals according to the present invention;

FIG. 2 is a schematic diagram showing the refinement process of setting the white balance parameter of the second signal source of the terminal according to the increased green primary color gain value, the red primary color gain value, and the blue primary color gain value in the method of analog modulus signal compensation according to the present invention.

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The present invention provides a method for compensating analog-to-digital signals. In a first embodiment of the method for compensating analog-to-digital signals according to the present invention, referring to FIG. 1, the method for compensating for analog-to-digital signals includes:

Step S10, after the terminal performs white balance adjustment on the first signal source, acquiring a white balance parameter of the first signal source of the terminal, where the white balance parameter includes a green primary color gain value, a red primary color gain value, and a blue primary color gain value;

In this embodiment, the terminal is a smart TV, the first signal source is a digital signal source, and the second signal source is an analog signal source. After the factory technician completes the white balance adjustment of the digital signal source of the television terminal, the acquisition is performed. A white balance parameter of the digital signal source, the white balance parameter of the digital signal source includes a gain value of the three primary colors, that is, the white balance parameter includes a green primary color gain value, a red primary color gain value, and a blue primary color gain value.

In addition, the terminal may also be other types of terminals. In other embodiments of the method for modulating the analog signal of the present invention, the first signal source may be an analog signal source, and the second signal source may be a digital signal source, first to the terminal. The analog signal source performs white balance adjustment, and then obtains the white balance parameter of the analog signal source to obtain a white balance parameter corresponding to the digital signal source according to the white balance parameter of the analog signal, and the execution process is basically the same as the embodiment.

Step S20, determining whether the green primary color gain value in the white balance parameter is smaller than a first threshold corresponding to the first signal source;

Based on the brightness formula (for example, under analog signal: Y1=0.3R+0.6G+0.1B; under digital signal: Y2=0.21R+0.72G+0.07B, where Y1 is the brightness under the analog signal and Y2 is the digital signal The brightness, R is the red primary color gain value, G is the green primary color gain value, B is the blue primary color gain value), the green primary color gain value contributes the most to the luminance of the digital signal, the red primary color gain value contributes the second, and the blue primary color gain value contributes. The smallest, so first determine whether the acquired white balance parameter (the first signal source (in this embodiment, the first signal source is a digital signal source) white balance parameter) in the green primary color gain value is smaller than the first signal source corresponding to the first a threshold (the first threshold may be set by the user or automatically set by the terminal), if the green primary color gain value of the first signal source is less than the first threshold, indicating that the green primary color gain is too small, and the second signal source is obtained based on the green primary color gain The brightness may be too small, so the green base color gain needs to be increased; if the green base color gain of the first signal source is greater than or equal to the first threshold, the green base color gain is sufficiently large, and the second signal source is based on the green base color increase. The resulting brightness is not too small, so there is no need for increasing the gain of the green primary process.

In order to better understand the solution, the determination of the first threshold is explained. The first threshold in the present invention is obtained based on the brightness formula, and the first threshold of the digital signal source is obtained based on the brightness formula under the digital signal, and the analog signal source is obtained. The first threshold is based on the brightness formula under the analog signal (the brightness formula is based on the characteristics of the terminal display and various chip technical parameters and has been tested or tested many times), for example, the brightness formula under the digital signal is Y3=0.2126R+0.7152G+0.0722B (Y3 is the brightness under the digital signal, R is the red primary color gain value, G is the green primary color gain value, B is the blue primary color gain value), and the brightness formula of the digital signal corresponds to the first When a threshold value is 128, that is, when the green primary color gain value is greater than or equal to 128, the white balance parameter including the green primary color gain value can substantially ensure that the brightness is not too small.

Step S30, when the green primary color gain value is less than the first threshold, increasing the green primary color gain value to the first threshold, and increasing the red primary color gain value and the blue primary color gain value of the white balance parameter by a first numerical multiple, the first a numerical multiple is a ratio of the first threshold to the green primary gain value;

Step S40, setting a white balance parameter of the second signal source of the terminal according to the increased green primary color gain value, the red primary color gain value, and the blue primary color gain value.

When determining that the green primary color gain value of the first signal source is smaller than the first threshold corresponding to the first signal source, indicating that applying the white balance parameter of the first signal source to the second signal source may cause the second signal source to be displayed The brightness of the image is low, so the green primary color gain value of the white balance parameter of the first signal source is increased to the first threshold, and the red primary color gain value and the blue primary color gain value of the white balance parameter are increased by the first numerical multiple. The first numerical multiple is a ratio of the first threshold to the green primary gain value. For example, in the white balance parameter of the first signal source, the red primary color gain value R1=2, the green primary color gain value G1=4, the blue primary color gain value B1=1, and the first threshold corresponding to the first signal source is 8, then G1 is adjusted to 8. The first value is 2, R1 is adjusted to 4, B1 is adjusted to 2, that is, the increased red primary color gain value R2=4, the increased green primary color gain value G2=8, and the increased blue primary color gain. The value B2 = 2, then R2, G2, B2 are used as the white balance parameters of the second signal source. When determining that the green primary color gain value of the first signal source is greater than or equal to the first threshold corresponding to the first signal source, indicating that applying the white balance parameter of the first signal source to the second signal source does not cause the second signal source The brightness of the displayed image is low, so the white balance parameter of the first signal source can be directly used as the white balance parameter of the second signal source.

In this embodiment, after the terminal adjusts the white balance of the first signal source, the white balance parameter of the first signal source of the terminal is obtained, and then the green primary color gain value of the acquired white balance parameter is compared with the first signal. Comparing the first threshold corresponding to the source, if the green primary color gain value is less than the first threshold, increasing the green primary color gain value to the first threshold, and obtaining the red primary color gain value and the blue primary color gain in the obtained white balance parameter The value is increased by the same multiple as the multiple of the green primary color gain value, so that when the white balance parameter of the first signal source is detected to be unreasonable, the white balance parameter is adjusted, and finally the adjusted white balance parameter is used as the second. The white balance parameter of the signal source automatically adjusts the white balance parameter of the second signal source under the premise of ensuring the brightness of the output image of the second signal source, without requiring the factory to take time-consuming and inefficient second terminal source The white balance adjustment process also ensures that the terminal display brightness is not too small and can pass the energy consumption test smoothly.

Further, based on the first embodiment of the method for compensating the analog-digital signal of the present invention, a second embodiment of the method for compensating the analog-digital signal is proposed. Referring to FIG. 2, in the second embodiment, the increased The green primary color gain value is used as the first green primary color gain value, the increased red primary color gain value as the first red primary color gain value, and the increased blue primary color gain value as the first blue primary color gain value, and the step S40 includes:

Step S41, determining whether the first red primary color gain value is smaller than a second threshold corresponding to the first signal source;

Step S42, when the first red primary color gain value is less than the second threshold, increasing the first red primary color gain value to a second threshold, wherein the increased first red primary color gain value is used as the second red primary color gain value;

Step S43, increasing the first blue primary color gain value by a second numerical multiple, the second numerical value being a ratio of the second threshold value to the first red primary color gain value, wherein the increased first blue primary color gain value is used as the second blue color Primary color gain value;

Step S44, setting a white balance parameter of the second source of the terminal according to the first green primary color gain value, the second red primary color gain value, and the second blue primary color gain value.

When determining that the green primary color gain value is smaller than the first threshold in the white balance parameter of the first signal source, increasing the green primary color gain to the first threshold corresponding to the first signal source to obtain the first green primary color gain value, and increasing in proportion Corresponding red primary color gain value and blue primary color gain value to obtain a first red primary color gain value and a first blue primary color gain value, and then the first red primary color gain value and the second threshold corresponding to the first signal source (second threshold The determining process is substantially the same as the first threshold. The comparison is performed. When the first red gain value is less than the second threshold, the surface uses the first green primary color gain value, the first red primary color gain value, and the first blue primary color gain value as the second signal. The source may cause the brightness of the image displayed by the second signal source to be low, so that the first red gain value is increased to the second threshold to obtain the second red gain value, and the first blue gain value is increased by the second value multiple. a second blue gain value, wherein the second value is a ratio of the second threshold value to the first red primary color gain value, and the first green primary color gain value, the second red primary color gain value, and the second blue primary color gain value are set as terminals White balance parameters two sources. When the first red gain value is greater than or equal to the second threshold, indicating that applying the first green primary color gain value, the first red primary color gain value, and the first blue primary color gain value to the second signal source does not cause the second signal source to be displayed The image brightness is low, so the first green primary color gain value, the first red primary color gain value, and the first blue primary color gain value can be directly used as the white balance parameter of the second signal source.

Following the example of the above step S40, the first red primary color gain value R2=4, the first green primary color gain value G2=8, the first blue primary color gain value B2=2, and if the second threshold value is 6, the R2 is adjusted to 6 G2 is unchanged, B2 is adjusted to 3, that is, the second red primary color gain value R3=6, the second blue primary color gain value B3=3, and R3, G2, B3 are used as the white balance parameters of the second signal source.

In this embodiment, by further determining whether the first red primary color gain value of the first signal source is less than a second threshold, if the first red primary color gain value is less than the second threshold, increasing the first red primary color gain value to the first The second threshold obtains the second red primary color gain value, and the first blue primary color gain value is increased by the second numerical multiple to obtain the second blue primary color gain value, and the first green primary color gain value, the first red primary color gain value, and the first The blue primary color gain value is used as the white balance parameter of the second signal source, so that when the green primary color gain value is sufficiently large, the red primary color gain value is further ensured to be sufficiently large, and the green primary color gain value can be assisted to ensure the brightness of the second secondary signal source. Further ensure that the terminal passes the energy consumption test.

Further, based on the second embodiment of the method for compensating the analog-digital signal of the present invention, a third embodiment of the method for compensating the analog-digital signal is proposed. In the third embodiment, the step S44 includes:

Step S441, determining whether the second red primary color gain value is greater than a red gain extreme value corresponding to the first signal source;

Step S442, when the second red primary color gain value is greater than the red gain extreme value corresponding to the first signal source, the second red primary color gain value is reduced to the red gain extreme value to obtain the third red primary color gain value;

Step S443, setting the first green primary color gain value, the third red primary color gain value, and the second blue primary color gain value as white balance parameters of the second source of the terminal.

When the red primary color gain value of the first signal source is adjusted twice to obtain the second red primary color gain value, it is determined whether the second red primary color gain value is greater than the red gain extreme value corresponding to the first signal source, and if the second red primary color is The gain value is greater than the red gain extreme value, indicating that the image displayed by the white balance parameter including the second red primary color gain value is reddish, and the second red primary color gain value is reduced to the red gain extreme value and the reduced second value is obtained. The red primary color gain value is used as the third red primary color gain value, the second blue primary color gain value is unchanged, and then the first green primary color gain value, the third red primary color gain value, and the second blue primary color gain value are set as the terminal second signal source. White balance parameters.

In this embodiment, after the green color gain value is adjusted once, the red primary color gain value and the blue primary color gain value are secondarily adjusted, the second red primary color gain value red gain pole obtained by the two adjustments is further adjusted. The values are compared to prevent the second red primary color gain value from being too large, so that the image displayed by the white balance parameter including the second red primary color gain value is reddish, and the white balance parameter acquired by the second signal source is displayed to have a moderate image chromaticity. .

Further, based on the third embodiment of the method for compensating the analog-to-digital signal of the present invention, a fourth embodiment of the method for compensating the analog-to-digital signal is proposed. In the fourth embodiment, after the step S441, the method further includes:

Step S444, when the second red primary color gain value is less than or equal to the red gain extreme value corresponding to the first signal source, the first green primary color gain value, the second red primary color gain value, and the second blue primary color gain value are set as the terminal number. The white balance parameter of the two sources.

When the red primary color gain value of the first signal source is adjusted twice to obtain the second red primary color gain value, it is determined whether the second red primary color gain value is greater than the red gain extreme value corresponding to the first signal source, and if the second red primary color is The gain value is less than or equal to the red gain extreme value, indicating that the white balance parameter including the second red primary color gain value displays a moderate image chromaticity, and does not need to adjust the second red primary color gain value, thereby further increasing the first green primary color gain value, The second red primary color gain value and the second blue primary color gain value are set to a white balance parameter of the second source of the terminal.

Further, based on the third or fourth embodiment of the method for analog-digital signal compensation of the present invention, the method for analog-digital signal compensation further includes:

Step S50, detecting, according to the chrominance system, whether the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter set as the second signal source of the terminal is color cast;

In this embodiment, step S50 may be set after step S443 or step S444, and the chrominance system may adopt the 1931 CIE-XYZ standard chromaticity system (ie, CIE-XYZ chromaticity system), and obtain the adjusted after the second signal source. After the first signal source corresponds to the white balance parameter, the green primary color gain value, the red primary color gain value, and the blue primary color gain value in the adjusted white balance parameter are obtained, and then the green primary color gain value (G) obtained by the second signal source, The red primary color gain value (R) and the blue primary color gain value (B) are converted from the values in the CIE-RGB chromaticity system to the values in the CIE-XYZ chromaticity system, and the obtained green primary color gain value (G) is determined. The red primary color gain value (R) and the blue primary color gain value (B) correspond to whether the value in the CIE-XYZ chromaticity system is up to standard, that is, based on the CIE-XYZ chromaticity system, the green balance parameter set as the terminal second signal source is determined. Whether the image formed by the primary color gain value, the red primary color gain value, and the blue primary color gain value is color cast.

Step S60, if the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the terminal second signal source is color cast, adjust the first threshold, the second threshold, and/or The red gain extreme value is used to adjust the green primary color gain value, the red primary color gain value, and the blue primary color gain value set to the white balance parameter of the second source of the terminal.

If the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the terminal second signal source is color cast, the first threshold, the second threshold, and the red are increased or decreased. One or more of three values of the gain extremum, and re-executing the analog-to-digital signal of the present invention after increasing or decreasing one or more of the three values of the first threshold, the second threshold, and the red gain extremum a step of the first, second, third or fourth embodiment of the method for compensating to adjust a green primary color gain value, a red primary color gain value, and a blue primary color gain value of the white balance parameter set as the second source of the terminal, And according to the chrominance system (for example, CIE-XYZ chromaticity system), detecting whether the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter currently set as the second source of the terminal is biased. Color, if no color cast occurs, save the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter currently set as the second source of the terminal; if there is a color cast, continue to increase or Reducing one or more of the three values of the first threshold, the second threshold, and the red gain extreme value until the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the current second signal source The formed image does not undergo color cast.

Further, in the process of increasing or decreasing one or more of the three values of the first threshold, the second threshold, and the red gain extremum, increasing or decreasing the order of the objects, increasing or decreasing The size can be set according to actual needs, for example, whether the first threshold is first increased or the second threshold is increased first, and the actual demand can be set.

In this embodiment, the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the second source of the terminal are adjusted to avoid displaying the color cast image, and an empirical value (eg, a first threshold, The combination of the second threshold or the red gain extreme value) and the actual color detection avoids that the second signal source generates a color cast based on the acquired white balance parameter due to the difference in the hardware and software of the terminal, which is not adapted to the empirical value. It is also possible to adjust the empirical value according to the actual situation of the terminal hardware and the software, so that the image formed by the green primary color gain value, the red primary color gain value and the blue primary color gain value of the white balance parameter set as the second signal source does not undergo color cast.

The present invention also provides an apparatus for compensating for analog-to-digital signals. In a first embodiment of the apparatus for compensating for analog-digital signals, the apparatus for compensating for analog-to-digital signals includes:

The explanation and effect of the present embodiment can be referred to the contents of the description of the first embodiment of the method of analog-digital signal compensation of the present invention.

Further, based on the first embodiment of the apparatus for analog-digital signal compensation of the present invention, a second embodiment of the apparatus for compensating the analog-digital signal is proposed. In the second embodiment, the parameter setting module includes:

The explanation and effects of the present embodiment can be referred to the contents of the description of the second embodiment of the method of analog-digital signal compensation of the present invention.

Further, based on the second embodiment of the apparatus for analog-digital signal compensation of the present invention, a third embodiment of the apparatus for compensating for analog-digital signals is proposed. In the third embodiment,

The parameter setting unit includes:

The explanation and effect of the present embodiment can be referred to the contents of the description of the third embodiment of the method of analog-digital signal compensation of the present invention.

Further, in the fourth embodiment of the apparatus for compensating the analog-to-digital signal, the fourth embodiment of the present invention, the parameter setting unit further includes:

The explanation and effect of the present embodiment can be referred to the contents of the description of the fourth embodiment of the method of analog-digital signal compensation of the present invention.

Further, based on the third or fourth embodiment of the apparatus for analog-digital signal compensation of the present invention, the apparatus for analog-digital signal compensation further includes:

For the explanation and effect of the present embodiment, reference may be made to the contents of the description of the preferred embodiment of the fourth embodiment of the method for compensating the analog-digital signal of the present invention.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims

A method for compensating analog-to-digital signals, characterized in that: the first signal source is a digital signal source, and the second signal source is an analog signal source, and the method for compensating the analog-to-digital signal comprises:

After the terminal performs white balance adjustment on the first signal source, acquiring a white balance parameter of the first signal source of the terminal, where the white balance parameter includes a green primary color gain value, a red primary color gain value, and a blue primary color gain value;

Determining whether the green primary color gain value in the white balance parameter is smaller than a first threshold corresponding to the first signal source, where the first threshold is determined based on a preset brightness formula;

When the green primary color gain value is less than the first threshold, increasing the green primary color gain value to the first threshold value, and increasing the red primary color gain value and the blue primary color gain value of the white balance parameter a first numerical multiple, the first numerical multiple is a ratio of the first threshold value to the green primary color gain value; wherein, the increased green primary color gain value is used as the first green primary color gain value, and the increased red color The primary color gain value is used as the first red primary color gain value and the increased blue primary color gain value as the first blue primary color gain value;

Determining whether the first red primary color gain value is smaller than a second threshold corresponding to the first signal source;

When the first red primary color gain value is less than the second threshold, increasing the first red primary color gain value to the second threshold, wherein the increased first red primary color gain value is used as the first Two red primary color gain values;

And increasing the first blue primary color gain value by a second numerical multiple, the second numerical value being a ratio of the second threshold value to the first red primary color gain value, wherein the increased first blue primary color gain The value is used as the second blue primary color gain value;

And setting a white balance parameter of the second source of the terminal according to the first green primary color gain value, the second red primary color gain value, and the second blue primary color gain value.
The method of analog-digital signal compensation according to claim 1, wherein said setting is based on said first green primary color gain value, said second red primary color gain value, and said second blue primary color gain value The steps of the white balance parameter of the second signal source of the terminal include:

Determining whether the second red primary color gain value is greater than a red gain extreme value corresponding to the first signal source;

When the second red primary color gain value is greater than the red gain extreme value corresponding to the first signal source, reducing the second red primary color gain value to the red gain extreme value to obtain a third red primary color gain value ;

And setting the first green primary color gain value, the third red primary color gain value, and the second blue primary color gain value to a white balance parameter of the terminal second signal source.
The method of claim 2, wherein the step of determining whether the second red primary color gain value is greater than a red gain extreme value corresponding to the first signal source further comprises:

When the second red primary color gain value is less than or equal to a red gain extreme value corresponding to the first signal source, the first green primary color gain value, the second red primary color gain value, and the second blue The primary color gain value is set to the white balance parameter of the second source of the terminal.
The method of compensating for analog-to-digital signals according to claim 3, wherein the method for compensating the analog-to-digital signal further comprises:

Detecting, according to the chrominance system, whether the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the terminal second signal source is color cast;

Adjusting the first threshold, the second threshold, and/or if the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the terminal second signal source is color cast. Or a red gain extremum to adjust a green primary color gain value, a red primary color gain value, and a blue primary color gain value set to a white balance parameter of the terminal second signal source.
The method of compensating for analog-to-digital signals according to claim 2, wherein the method for compensating the analog-to-digital signal further comprises:

Detecting, according to the chrominance system, whether the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the terminal second signal source is color cast;

Adjusting the first threshold, the second threshold, and/or if the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the terminal second signal source is color cast. Or a red gain extremum to adjust a green primary color gain value, a red primary color gain value, and a blue primary color gain value set to a white balance parameter of the terminal second signal source.
A method for compensating analog-to-digital signals, characterized in that the method for compensating for analog-to-digital signals comprises:

After the terminal performs white balance adjustment on the first signal source, acquiring a white balance parameter of the first signal source of the terminal, where the white balance parameter includes a green primary color gain value, a red primary color gain value, and a blue primary color gain value;

Determining whether a green primary color gain value in the white balance parameter is smaller than a first threshold corresponding to the first signal source;

When the green primary color gain value is less than the first threshold, increasing the green primary color gain value to the first threshold value, and increasing the red primary color gain value and the blue primary color gain value of the white balance parameter a first numerical multiple, the first numerical multiple being a ratio of the first threshold to the green primary gain value;

And setting a white balance parameter of the second signal source of the terminal according to the increased green primary color gain value, red primary color gain value, and blue primary color gain value.
The method for compensating analog-to-digital signals according to claim 6, wherein the increased green primary color gain value is used as the first green primary color gain value and the increased red primary color gain value is used as the first red primary color gain value. The increased blue primary color gain value is used as the first blue primary color gain value.

The step of setting the white balance parameter of the second signal source of the terminal according to the increased green primary color gain value, red primary color gain value, and blue primary color gain value includes:

Determining whether the first red primary color gain value is smaller than a second threshold corresponding to the first signal source;

When the first red primary color gain value is less than the second threshold, increasing the first red primary color gain value to the second threshold, wherein the increased first red primary color gain value is used as the first Two red primary color gain values;

And increasing the first blue primary color gain value by a second numerical multiple, the second numerical value being a ratio of the second threshold value to the first red primary color gain value, wherein the increased first blue primary color gain The value is used as the second blue primary color gain value;

And setting a white balance parameter of the second source of the terminal according to the first green primary color gain value, the second red primary color gain value, and the second blue primary color gain value.
The method of analog-to-digital signal compensation according to claim 7, wherein said setting is based on said first green primary color gain value, said second red primary color gain value, and said second blue primary color gain value The steps of the white balance parameter of the second signal source of the terminal include:

Determining whether the second red primary color gain value is greater than a red gain extreme value corresponding to the first signal source;

When the second red primary color gain value is greater than the red gain extreme value corresponding to the first signal source, reducing the second red primary color gain value to the red gain extreme value to obtain a third red primary color gain value ;

And setting the first green primary color gain value, the third red primary color gain value, and the second blue primary color gain value to a white balance parameter of the terminal second signal source.
The method of claim 8, wherein the step of determining whether the second red primary color gain value is greater than a red gain extreme value corresponding to the first signal source further comprises:

When the second red primary color gain value is less than or equal to a red gain extreme value corresponding to the first signal source, the first green primary color gain value, the second red primary color gain value, and the second blue The primary color gain value is set to the white balance parameter of the second source of the terminal.
The method of compensating for analog-to-digital signals according to claim 9, wherein the method for compensating the analog-to-digital signal further comprises:

Detecting, according to the chrominance system, whether the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the terminal second signal source is color cast;

Adjusting the first threshold, the second threshold, and/or if the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the terminal second signal source is color cast. Or a red gain extremum to adjust a green primary color gain value, a red primary color gain value, and a blue primary color gain value set to a white balance parameter of the terminal second signal source.
The method of compensating for analog-to-digital signals according to claim 8, wherein the method for compensating the analog-to-digital signal further comprises:

Detecting, according to the chrominance system, whether the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the terminal second signal source is color cast;

Adjusting the first threshold, the second threshold, and/or if the image formed by the green primary color gain value, the red primary color gain value, and the blue primary color gain value of the white balance parameter of the terminal second signal source is color cast. Or a red gain extremum to adjust a green primary color gain value, a red primary color gain value, and a blue primary color gain value set to a white balance parameter of the terminal second signal source.
An apparatus for compensating for analog-to-digital signals, wherein the apparatus for compensating for analog-to-digital signals comprises:

a parameter obtaining module, configured to obtain a white balance parameter of the first signal source of the terminal after the terminal performs white balance adjustment on the first signal source, where the white balance parameter includes a green primary color gain value, a red primary color gain value, and a blue primary color Gain value

a determining module, configured to determine whether a green primary color gain value in the white balance parameter is smaller than a first threshold corresponding to the first signal source;

An increasing module, configured to increase the green primary color gain value to the first threshold value and the red primary color gain value of the white balance parameter when the green primary color gain value is less than the first threshold value The blue primary color gain value is increased by a first numerical multiple, and the first numerical multiple is a ratio of the first threshold value to the green primary color gain value;

And a parameter setting module, configured to set a white balance parameter of the second signal source of the terminal according to the increased green primary color gain value, red primary color gain value, and blue primary color gain value.
The apparatus for compensating analog-digital signals according to claim 12, wherein the increased green primary color gain value is used as the first green primary color gain value and the increased red primary color gain value as the first red primary color gain value. The increased blue primary color gain value is used as the first blue primary color gain value.

The parameter setting module includes:

a gain value determining unit, configured to determine whether the first red primary color gain value is smaller than a second threshold corresponding to the first signal source;

a first gain increasing unit, configured to increase the first red primary color gain value to the second threshold when the first red primary color gain value is less than the second threshold, wherein the increased Decoding a first red primary color gain value as a second red primary color gain value;

a second gain increasing unit, configured to increase the first blue primary color gain value by a second numerical multiple, the second numerical value being a ratio of the second threshold value to the first red primary color gain value, wherein the increase The first blue primary color gain value is used as the second blue primary color gain value;

And a parameter setting unit, configured to set a white balance parameter of the second signal source of the terminal according to the first green primary color gain value, the second red primary color gain value, and the second blue primary color gain value.
The apparatus for compensating for analog-digital signals according to claim 13, wherein the parameter setting unit comprises:

a ratio determining unit, configured to determine whether the second red primary color gain value is greater than a red gain extreme value corresponding to the first signal source;

a first secondary setting unit, configured to reduce the second red primary color gain value to the red gain pole when the second red primary color gain value is greater than a red gain extreme value corresponding to the first signal source And obtaining a third red primary color gain value, and setting the first green primary color gain value, the third red primary color gain value, and the second blue primary color gain value to a white balance of the terminal second signal source parameter.
The apparatus for compensating for analog-to-digital signals according to claim 14, wherein the parameter setting unit further comprises:

a second secondary setting unit, configured to: when the second red primary color gain value is less than or equal to a red gain extreme value corresponding to the first signal source, the first green primary color gain value, the second red The primary color gain value and the second blue primary color gain value are set to a white balance parameter of the terminal second signal source.
The apparatus for compensating for analog-to-digital signals according to claim 15, wherein the means for compensating the analog-to-digital signal further comprises:

a color cast detection module, configured to detect, according to a chroma system, whether an image formed by a green primary color gain value, a red primary color gain value, and a blue primary color gain value of a white balance parameter of the terminal second signal source is color cast; Adjusting the first threshold, the second threshold, and/or by performing color cast on an image formed by a green primary color gain value, a red primary color gain value, and a blue primary color gain value of the white balance parameter of the terminal second signal source. The red gain extreme value is used to adjust the green primary color gain value, the red primary color gain value, and the blue primary color gain value set as the white balance parameter of the terminal second signal source.
The apparatus for compensating for analog-to-digital signals according to claim 15, wherein the means for compensating the analog-to-digital signal further comprises:

a color cast detection module, configured to detect, according to a chroma system, whether an image formed by a green primary color gain value, a red primary color gain value, and a blue primary color gain value of a white balance parameter of the terminal second signal source is color cast; Adjusting the first threshold, the second threshold, and/or by performing color cast on an image formed by a green primary color gain value, a red primary color gain value, and a blue primary color gain value of the white balance parameter of the terminal second signal source. The red gain extreme value is used to adjust the green primary color gain value, the red primary color gain value, and the blue primary color gain value set as the white balance parameter of the terminal second signal source.