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Video signal processing method and device thereof

A video signal processing and video signal technology, applied in the field of video signal processing methods and devices, can solve the problems of video image color distortion and the like

Active Publication Date: 2014-05-07
BEIJING TIMES OSEE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, in the RGB color space and YUV color space conversion process of video processing, the color space matrix correction is not performed or the color space correction matrix is ​​not processed differently according to different video signal formats, so that the output video image color There is distortion

Method used

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  • Video signal processing method and device thereof
  • Video signal processing method and device thereof
  • Video signal processing method and device thereof

Examples

Experimental program
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Embodiment 1

[0058] Figure 5 It is a flow chart of the video signal processing method provided by the first embodiment of the present invention. The execution subject of the embodiment of the present invention can be an FPGA or a video processing chip in the up-down converter. The process is described in detail as follows:

[0059] Step 501: Receive an input video signal.

[0060] In this embodiment, the video signal can be an SDI (Serial Digital Interface, digital component serial interface) signal, or an LVDS (Low Voltage Differential Signaling, low voltage differential signal) signal, and the FPGA is used to receive the SDI signal , the video processing chip is used for receiving LVDS signals.

[0061] Step 502. Determine the signal format of the video signal.

[0062] In this embodiment, the signal format may be a standard definition 480i signal, a standard definition 576i signal or a high definition signal.

[0063] Step 503, according to the video signal and the signal format of ...

no. 2 example

[0069] This embodiment further describes the method for obtaining the template color space matrix on the basis of the above embodiments, and the specific steps are as follows Figure 6 shown.

[0070] Step 601. Respectively receive red, green, and blue template video signals in the signal format.

[0071] For example, red, green, and blue template video signals whose signal formats are high-definition signals are respectively received.

[0072] Step 602 : After receiving the template video signal each time, according to the signal format of the currently received template video signal, establish a corresponding relationship between the source color space and the target color space of the currently received template video signal.

[0073] In this embodiment, the color space to which the received template video signal belongs is called the source color space of the template video signal, and the target color space of the template video signal is ideally the source color space o...

no. 3 example

[0094] Figure 7 The third embodiment of the present invention is shown. Based on the above-mentioned embodiments, this embodiment provides a preferred example and provides a complete solution. The example is completed jointly by FPGA and video processing chip. The example is detailed as follows:

[0095] The FPGA receives the serial SDI signal, and converts the serial SDI signal into a parallel SDI signal and sends it to the video processing chip. After the video processing chip receives the parallel SDI signal, it judges the parallel SDI signal signal format, and according to the signal format, select the corresponding template color space matrix, and convert the color space of the parallel SDI signal from YUV to RGB according to the selected template color space matrix, for example, receiving the parallel SDI signal When the signal format is SD 576i, select a template color space matrix corresponding to SD 576i, and superimpose the template color space matrix on the source...

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Abstract

The present invention discloses a video signal processing method and a device thereof. The video signal processing method comprises the steps of: receiving an input video signal; determining the signal format of the video signal; selecting a template color space matrix according to the video signal and the signal format of the video signal; and according to the video signal, the signal format of the video signal and the selected template color space matrix, converting the color space of the video signal. According to the video signal processing method and the device provided by an embodiment of the invention, when video signal color space conversion is performed, a corresponding template color space matrix is selected through the signal format of the received video signal, and furthermore according to the selected template color space matrix, the source color space of the video signal is converted to a target color space, thereby reducing color distortion of the video signal in conversion process.

Description

technical field [0001] The invention relates to video display technology, in particular to a video signal processing method and device. Background technique [0002] With the rapid development of video technology, new video technology is applied to the up-down converter. From the application and evaluation results of the current mainstream up-down converters, it can be seen that the up-down Differences in processing chips and video processing algorithms also have a certain impact on the transformed video image. [0003] In the prior art, the processing process of the video signal in the up-down converter is as follows: the received serial video signal is first converted into a parallel video signal by FPGA (Field Programmable Gate Array, Field Programmable Gate Array), and sent to the video In the processing chip, after receiving the parallel signal, the video processing chip performs deinterlacing, image scaling and enhancement, AFD (Active Format Description, active image...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/64
Inventor 武凤宇徐道武
Owner BEIJING TIMES OSEE TECH CO LTD