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Video data processing method and device

A technology of video data and processing devices, applied in the field of data processing, which can solve problems such as low bit rate, prone to misjudgment, and affecting image quality

Inactive Publication Date: 2013-05-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, SAD can only show the difference in pixels between adjacent frame images, which leads to misjudgment easily. It will increase the QP, but in fact this is not a scene switch or violent movement. If the QP is increased, the bit rate will be too low and the image quality will be affected

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Embodiment Construction

[0070] Embodiments of the present invention provide a video data processing method and device, which can avoid misjudgment as much as possible, thereby maintaining the balance between bit rate control effect and image quality.

[0071] see figure 1 , an embodiment of the video data processing method in the embodiment of the present invention includes:

[0072] 101. Calculate a first MAD histogram of the first image and a first MSE histogram of the first image;

[0073] In this embodiment, when the QP needs to be determined to prevent bit rate overshoot, the video data processing device may calculate the MAD histogram of the first image and the MSE histogram of the first image, where the first image is the current frame image.

[0074] For ease of description, in the following embodiments, the MAD histogram of the first image is referred to as the first MAD histogram for short, and the MSE histogram of the first image is referred to as the first MSE histogram for short.

[00...

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Abstract

The embodiment of the invention discloses a video data processing method and a video data processing device. Erroneous judgment can be avoided as much as possible, so that balance between a code rate control effect and image quality is kept. The method provided by the embodiment of the invention comprises the following steps of: calculating a first mean absolute difference MAD histogram of a first image and a first mean square error (MSE) histogram of the first image, wherein the first image is a current frame of image; calculating a difference parameter according to the first MAD histogram and the first MSE histogram; and determining a quantization parameter QP according to the difference parameter. The embodiment of the invention also provides a video data processing device. According to the embodiment of the invention, the erroneous judgment can be effectively avoided, so that the balance between the code rate control effect and the image quality is kept.

Description

technical field [0001] The invention relates to the field of data processing, in particular to a video data processing method and device. Background technique [0002] Bit rate control is an important control method in video coding. Its purpose is to prevent buffer overflow and improve image quality as much as possible while satisfying bandwidth constraints. [0003] In coding scenarios such as H.264 and MPEG4, bit rate control is very important. Quantization parameter (QP, Quantization Parameter) is a parameter used to control coding quality and bit rate in these coding scenarios. The smaller the QP, the higher the image quality. The higher the code rate, the larger the QP, the lower the image quality and the lower the code rate, so the code rate can be controlled by adjusting the QP. [0004] For example, in the monitoring field where H.264 and MPEG4 encoding methods are applied, the camera needs to encode the captured images, and then transmit the code stream to the moni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/124H04N19/142
Inventor 张春晓魏旭云李旭
Owner HUAWEI TECH CO LTD
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