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Adaptive frequency hopping method and device

An adaptive and frame-skipping technology, applied in the direction of pulse modulation TV signal transmission, etc., can solve the problem of poor image quality, and achieve the effect of saving bits, improving video space quality, and improving space quality.

Inactive Publication Date: 2009-03-25
湖北鸿云科技股份有限公司
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Problems solved by technology

[0005] In view of this, the present invention provides an adaptive frame skipping method and device to solve the problem of poor image quality in the above frame skipping scheme

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  • Adaptive frequency hopping method and device
  • Adaptive frequency hopping method and device

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Embodiment Construction

[0028] In order to clearly illustrate the solutions in the present invention, preferred embodiments are given below and detailed descriptions are given in conjunction with the accompanying drawings.

[0029] see figure 1 , the method in the embodiment of the present invention includes:

[0030] Step 11: calculate the average value of the motion vector of the current frame;

[0031] When calculating the average value, first calculate the values ​​of all motion vectors, save and sort the motion vectors of all macroblocks, that is, get MAx and MAy, and select the 20% to 30% of the largest motion vector values ​​​​MVx, MVy, The average value MA is obtained by the selected motion vector value; for the motion vector value of the INTRA block, because only the macro whose motion estimation does not match a suitable block is used for INTRA model encoding, it can be considered that its motion vector is the maximum value of the motion estimation range , taking the maximum value as the ...

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Abstract

The invention discloses a self-adaptive frame skipping method and a device. The method comprises the following steps: the mean value of the motion vector of a current frame is calculated; the weighted sum is used as a smoothing factor, and the weighted sum is composed of the ratio of the mean value of the motion vector of the current frame and the mean value of the average motion vector of at least one adjacent latest frame which is calculated as well as the ratio of the relative mean value of the motion vector of the current frame and the relative mean value of the average motion vector of at least one adjacent latest frame which is calculated; and if the value of the smoothing factor is within the range of the threshold value, the current frame is processed through frame skipping. The self-adaptive frame skipping device is also provided. The self-adaptive frame skipping method and the device accord with the HVS visual characteristics, ensure that a terminal user obtains optimal visual quality, and satisfy the image quality without affecting the visual quality when a user views the image.

Description

technical field [0001] The invention relates to the technical field of multimedia processing, in particular to an adaptive frame skipping method and device in video coding. Background technique [0002] In multimedia data processing, bit rate control is a key technology of real-time video coding, which determines the quality of encoded images; especially in wireless low variable bit rate real-time video communication, bit rate control algorithm is very important. [0003] Frame skip processing is a frame-level control technology of bit rate control, which balances time quality and space topic selection in variable bit rate channels, and finally obtains the optimal decoded video quality. In the past, video was mainly transmitted over a limited network, with little fluctuation in bandwidth. It was basically encoded at a fixed bit rate, and rarely had frame skipping processing, so there were not many studies. The more classic frame skipping method is the frame skipping method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24
Inventor 沈未名黄晓平种衍文万守杰杨黎东方广李伟宋绘宏鲁盛
Owner 湖北鸿云科技股份有限公司
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