Control method for code rate of three-dimensional video based on SAQD domain

Abstract

The invention provides a control method for the code rate of a three-dimensional video based on an absolutely quantified residual error and an SAQD domain. In the method, a coding frame of a three-dimensional video with a gradable space coding structure based on an SVC solves the problem of optimal code rate distribution between the channels of the three-dimensional video by introducing the SAQD domain. The invention provides a rate model and a distortion model based on the SAQD domain and obtains the optimal code rates of a left channel and a right channel of the three-dimensional video by the resolution of an Lagrange's equation; and then, the quantified step length of each coding unit is obtained according to the calculated optimal code rate of each coding unit by the calculation of a linear code rate control model, thereby further coding each coding unit. Compared with the modes that the two channels of the three-dimensional video adopt fixed code rate distribution and a code rate control algorithm in an H.264 / SVC standard is adopted in each channel, the peak signal-to-noise ratio of a decoding image obtained by carrying out code rate control by adopting the method is higher, the bias of the output code rate of a coding end and a target code rate is smaller, and the method can adapt to the change of the bandwidth of a network fully.

Description

technical field [0001] The present invention relates to the computer field, in particular to a stereoscopic video rate control method based on SAQD (Sum of Absolute Quantized Difference) domain. Background technique [0002] Stereoscopic video technology is a research hotspot in the field of video today, and it is also an important development direction of video technology in the future. It is a new video technology that can provide stereoscopic effect. Stereoscopic video technology mainly includes stereoscopic video capture, stereoscopic video compression coding, stereoscopic video transmission, and stereoscopic display technology. Compared with two-dimensional video, stereoscopic video increases the depth information of the scene, enhances the sense of reality, layering and realism of vision, and enables the observer to obtain richer and more comprehensive information. [0003] The purpose of stereoscopic video coding and transmission is to provide the receiving end with...

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Problems solved by technology

[0006] In order to solve the deficiencies of the above stereoscopic video rate control method, the present invention adopts the stereoscopic video coding framework based on the SVC-based spatially scalable coding structure, and solves the problem of optimal bit rate allocation between stereoscopic video channels by introducing the SAQD domain, and proposes a Stereoscopic Video Rate Control Method Based on Absolute Quantization Residual Error and SAQD Domain

This method aims to solve the problem of optimal bit allocation between the two channels of stereoscopic video. While meeting the network bandwidth requirements during stereoscopic video transmission, it provides the best decoded image quality to the receiving end, so as to reduce the distortion of the decoded image and the network bandwidth. Balance between bandwidth

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