Rate Control Apparatus and Method Using Spatial Prediction Error Model for Moving Picture Coding

摘要

The present invention relates to a rate control method in the case of encoding the video at a fixed bit rate, by determining the complexity of the image by applying a spatial prediction error in determining a quantization factor, it can be efficiently coded than the same bit-rate condition.; The present invention can be encoded in a higher picture quality at the same bit rate condition by applying a spatial prediction error in the bit generation amount can be accurately predicted than the bit amount models when coding the video as a fixed bit rate.; The present invention provides a first step in the rate control method of a video encoder using spatial prediction error model, it calculates the complexity of a macroblock by using the spatial prediction error and; A second step for determining the quantization parameter by using the complexity of the macroblock is computed in the first step; And a third step of encoding the macroblock using the quantization coefficients determined in the second step, and updating the bit generation model by using the actual generated bit quantity. The invention can be used for a video encoder, video editing, and Builder.