Image processing apparatus and method, and program

摘要

An image processing apparatus, a method, and a program that enable an amount of code to be suppressed below a desired value with more reliability. An emergency mode determining section determines that the amount of code of a next picture is likely to exceed an upper limit if a target bit calculated by a rate controlling section exceeds a predetermined upper limit. If it is determined that the amount of code of the next picture is likely to exceed the upper limit, the code amount controlling section controls an orthogonal transducing section to replace a transform coefficient of a predetermined frequency component with zero, controls an intra predicting section to restrict intra prediction modes to be applied, and controls a mode determining section to restrict inter prediction modes to be applied. The prevent invention can be applied to an encoding apparatus.

主权项

1. An image processing apparatus for encoding an image, comprising:
circuitry configured to
determine whether or not an amount of code for a picture, to be encoded based on a quantization parameter controlled by a bit rate controller, is estimated to exceed a predetermined upper limit, andcontrol encoding to suppress an amount of code per picture in accordance with a method different from that of the quantization parameter control method of the bit rate controller if it is determined that the amount of code for the picture is estimated to exceed the upper limit, wherein the circuitry is configured to calculate a cost value for only a limited prediction direction, and does not calculate cost values for other prediction directions, for performing an intra prediction to suppress the amount of code per picture in accordance with the different method.