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.