INTER-FRAME PREDICTIVE CODING METHOD AND CODER

摘要

The present invention discloses an inter-frame predictive coding method and a coder. Inter-frame predictive coding is sequentially performed on frames in multiple groups of pictures by using a group of pictures as a unit; a correlation between the reference B frame and a GPB frame in the same group of pictures is used; and when the maximum depth of the CTU in the same position in the GPB frame is smaller, a quantity of mode decisions performed on the CTU in the reference B frame may be relatively small, so that an objective of reducing complexity of an inter-frame predictive coding process of the reference B frame is achieved.

主权项

1. An inter-frame predictive coding method, comprising:
sequentially performing inter-frame predictive coding on frames in each group of pictures, wherein a process of performing inter-frame predictive coding on frames in any group of pictures is as follows: for any coding tree unit (CTU) in a to-be-coded reference B frame in a current group of pictures, determining a first maximum depth of a CTU from a GPB frame or P frame that is the closest to the to-be-coded reference B frame in the current group of pictures and of which inter-frame predictive coding is completed, wherein the determined CTU and the CTU in the to-be-coded reference B frame are in a same position in their respective frames; and when inter-frame predictive coding is performed on the CTU in the to-be-coded reference B frame, a splitting depth of the CTU does not exceed the first maximum depth.