GOP layer ratio control and adjustment method and system based on exercise intensity

A technology of motion intensity and adjustment method, applied in the field of video coding and decoding, can solve the problem that the relative still film source coding is not optimized, and the difference of different GOP images is not considered, and achieves optimization of calculation amount control, performance improvement optimization, The effect of encoding performance optimization

Active Publication Date: 2014-09-17
深圳市梦网视讯有限公司
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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to propose a GOP layer rate control adjustment method based on motion intensity, aiming to solve the problem that the rate co...

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  • GOP layer ratio control and adjustment method and system based on exercise intensity
  • GOP layer ratio control and adjustment method and system based on exercise intensity
  • GOP layer ratio control and adjustment method and system based on exercise intensity

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Embodiment 1

[0045] figure 1 It is a flow chart of a GOP layer rate control adjustment method based on exercise intensity in a preferred embodiment of the present invention; the method includes the following steps:

[0046] Step0: If the number of frames contained in each GOP set by the encoder is greater than fps*5, then encode the current encoded film source according to the original rate control method; otherwise, enter Step1.

[0047] Wherein, fps represents the frame rate of the encoded source; the original rate control method is a three-layer rate control method known in the art, such as the h264 rate control method or the h265 rate control method.

[0048] Step1: Calculate the motion intensity TI_gop of the current GOP.

[0049] Step11: to frame t The brightness information frame frame y,t Perform down-sampling processing to obtain

[0050] Among them, frame t It is the first frame of the current GOP in the playback order (that is, the tth frame of the current encoding source...

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Abstract

The invention discloses a GOP layer ratio control and adjustment method and system based on exercise intensity. The complex rate of the method is expressed through the exercise intensity of a GOP, the code rate allocation of a GOP layer is adjusted by utilizing the exercise intensity, an encoder can further adjust the code rate allocation of the GOP layer according to the complex rate of a coding sheet source, and therefore optimization of coding performance is achieved. In addition, scene detection variables are set to control effectiveness during frequent scene change periods, and therefore performance improvement and control over calculation amount can be optimized.

Description

technical field [0001] The invention relates to the field of video coding and decoding, in particular to a method and system for rate control and adjustment of a GOP layer based on motion intensity. Background technique [0002] Video coding sources are classified according to the complexity of motion, which can be simply expressed as: violent motion and relatively static. These two types of film sources have completely different characteristics in terms of time information redundancy: the sequences with intense movement have low time redundancy, while the relatively static ones have high time redundancy. The conventional rate control algorithm includes a three-level code rate allocation strategy of a GOP (Group of Pictures) layer, a picture layer, and a coding unit layer (or macroblock layer). Generally, the method of evenly allocating code rates is adopted at the GOP layer, while weighted allocation is adopted at the image layer and coding unit layer (or macroblock layer)...

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Application Information

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IPC IPC(8): H04N19/177H04N19/146H04N19/142
Inventor 洪婷
Owner 深圳市梦网视讯有限公司
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