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Code rate control method and device as well as image acquisition equipment and readable storage medium

A technology of image acquisition equipment and bit rate control, which is applied in image communication, TV, color TV components, etc., can solve problems such as affecting user experience, poor subjective rendering of pictures, and ignoring subjective feelings of human eyes, and achieves good subjective rendering , to achieve the effect of rate control

Active Publication Date: 2019-03-12
ZHEJIANG UNIVIEW TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the limited bandwidth, we need to work hard on video coding to achieve higher quality pictures. In the existing technology, there are schemes to control the bit rate through the complexity of image textures. For example, high-complexity textures use high-quality The above-mentioned scheme is evaluated from the objective condition of image texture complexity, and the same bit rate control is used for image areas with the same complexity, such as grass and flower beds, ignoring the subjectivity of the human eye. I feel that although the code rate of the encoded picture is controlled, the subjective presentation of the picture is poor, and it is difficult to meet user expectations, which affects the user experience

Method used

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  • Code rate control method and device as well as image acquisition equipment and readable storage medium
  • Code rate control method and device as well as image acquisition equipment and readable storage medium
  • Code rate control method and device as well as image acquisition equipment and readable storage medium

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no. 1 example

[0042] Please refer to figure 2 , is a schematic flowchart of the code rate control method provided in the first embodiment of the present invention. In the embodiment of the present invention, the code rate control method is applied to the image acquisition device 100, and the image acquisition device 100 pre-stores the corresponding relationship between different gains, different exposure times and reference distortion degrees of the image acquisition device 100 , wherein the corresponding relationship between them may be stored in the memory 110 of the image acquisition device 100 in the form of a table, or may be stored in the memory 110 of the image acquisition device 100 in other forms. next to figure 2 The specific flow and steps of the code rate control method shown will be described in detail.

[0043] In this embodiment, the code rate control method may include the following steps:

[0044] Step S220, acquiring the gain and exposure time of the image to be encod...

no. 2 example

[0098] The second embodiment of the present invention provides figure 1 A schematic block diagram of the code rate control device 200 shown in . Please refer to Figure 4 , in the embodiment of the present invention, the code rate control device 200 is applied to the image acquisition device 100, and the image acquisition device 100 pre-stores in the image acquisition device 100 different gain, different exposure time and the reference distortion Correspondence. The code rate control device 200 may include an acquisition module 220 , an acquisition module 230 , a calculation module 240 , a prediction module 250 and an encoding module 260 .

[0099] The acquiring module 220 is configured to acquire the gain and exposure time of the image to be encoded.

[0100] In this embodiment, the acquisition module 220 is used to execute figure 2 In step S220, for a detailed description of the acquisition module 220, reference may be made to step S220.

[0101] The obtaining module 2...

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Abstract

The embodiment of the invention provides a code rate control method and device as well as image acquisition equipment and a readable storage medium. The method comprises the following steps: acquiringgain of a to-be-coded image as well as exposure time from an image processing module of the image acquisition equipment; according to the gain of the to-be-coded image as well as the exposure time, obtaining corresponding reference distortion; calculating a difference value between distortion of a feature region in the to-be-coded image and the reference distortion; calculating by virtue of the difference value between the distortion of the feature region in the to-be-coded image and the reference distortion to obtain distortion tolerance of each macro block forming the to-be-coded image; performing macro block prediction on each macro block in the to-be-coded image to obtain an optimal macro block prediction mode; and performing coding on the to-be-coded image corresponding to the optimal macro block prediction mode, so as to complete control on code rate of the to-be-coded image. The method provided by the invention can guarantee an effect that a coded image has good subjective presence while code rate control is realized by virtue of linkage of image processing and coding.

Description

technical field [0001] The present invention relates to the monitoring field, in particular to a method, device, image acquisition device and readable storage medium for controlling the code rate of a monitoring video. Background technique [0002] Surveillance has undergone tremendous changes in recent years. Digitalization and high-definition have comprehensively improved the clarity of the image, which also puts forward higher requirements for network bandwidth. Now the mainstream 1080P has been gradually replaced by 5M, 8M or even 12M resolution, followed by The problem of insufficient bandwidth. Under the limited bandwidth, we need to work hard on video coding to achieve higher quality pictures. In the existing technology, there are schemes to control the bit rate through the complexity of image textures. For example, high-complexity textures use high-quality The above-mentioned scheme is evaluated from the objective condition of image texture complexity, and the same...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235
CPCH04N19/103H04N19/147H04N19/176H04N23/73H04N19/115H04N19/124H04N19/154H04N23/70H04N19/105H04N19/137H04N19/159H04N19/167H04N7/183H04N17/002
Inventor 吴辉严柯森徐琼
Owner ZHEJIANG UNIVIEW TECH CO LTD
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