Self-adaptive controlling method for a virtual buffering region in code rate control

Abstract

The invention relates to a self-adaptive controlling method for a virtual buffering region in code rate control. The method comprises that: a code rate controlling system comprising a complexity analyzer module, a code rate quantizing model R-Q, a QP limiter module, a quantizing encoder module, a GOP layer code rate controller module, a frame level code rate controlling module, a basic coding unitlayer code rate control module and the virtual buffering region is provided with a buffering region self-adaptive controlling module; and according to complexity information and time assisting information counted and analyzed by primary coding complexity of an inner frame in the past period and the current full scale and a current target balancing point of the virtual buffering region, the buffering region self-adaptive controlling module feeds back the current target balancing point c of the buffering region to the virtual buffering region and transmits an adjusting factor k of the bufferingregion to a frame level code rate controlling unit. Through the full scale of the virtual buffering region monitored by the buffering region self-adaptive controlling module and a complexity analyzing result, the self-adaptive controlling method sets parameters of the virtual buffering region to achieve the farthest utilization of the virtual buffering region and solve the problem of frame skip and the image quality stability.

Description

technical field [0001] The invention relates to a code rate control method, in particular to a virtual buffer self-adaptive control method in the code rate control. Background technique [0002] The bit rate control process is the process of controlling some encoding parameters of the video encoder to make the bit rate generated by the encoder comply with the predetermined bit rate. In practical applications, there are three commonly used bit rate control modes, one is the constant bit rate mode (Constant Bit Rate), the other is the variable bit rate mode (Variable Bit Rate) and the constrained variable bit rate mode mode (Constrained Variable Bit Rate). As the name implies, the CBR mode means that the code rate of the generated content is constant, and it is especially suitable for situations where the channel bandwidth is basically constant, such as PSTN channels. The VBR mode has no other additional constraints except that the total average bit rate meets the requiremen...

AI Technical Summary

Problems solved by technology

[0007] The direct consequence of the above control method is that in order to keep the buffer from overflowing when the scene changes, sometimes it is inevitable that some frames are not encoded, that is, frame skipping; another consequence is to maintain the buffer with the fluctuation of image quality The stability of the area, while the human eye is more sensitive to the fluctuation of image quality

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