Optimal multidimensional bit-rate control for video communication

摘要: In conventional bit-rate control, the buffer level is controlled by adapting quantization step size with a fixed frame rate and spatial resolution. We consider multidimensional (M-D) control where rate, resolution are jointly adapted for control. introduce fundamental framework to formalize description of M-D buffer-constrained allocation problem. Given set operating points on grid code nonstationary source in environment, we formulate optimal solution. The formulation allows skipped be reconstructed from one coded using any temporal interpolation method shown generalization formulations considered literature. case intraframe coding, dynamic programming algorithm introduced find compare operational rate-distortion bounds approaches. also discuss how solution can obtained interframe coding making an independent approximation. illustrate that approach provide reductions over 50%. show limited-lookahead provides slightly suboptimal consistently outperforms full-lookahead.