Video encoding method and a video encoding apparatus using the same

摘要

The present application provides a video encoding method that includes setting frame types for a video sequence; obtaining a B frame; determining whether a current macroblock of the B frame satisfies a Direct prediction mode, and if yes determining whether the current macroblock satisfies a Skip prediction mode; if the current macroblock does not meet either mode, computing at least one of a mode cost after performing motion compensation on the current macroblock using two bidirectional prediction motion vectors obtained in the Direct prediction mode; a mode cost after performing motion compensation on the current macroblock using a forward prediction motion vector obtained in the Direct prediction mode; and a mode cost after performing motion compensation on the current macroblock using a backward prediction motion vector obtained in the Direct prediction mode; and selecting a mode with a smallest cost as an optimal prediction direction to encode the current macroblock.

主权项

1. A video encoding method, the method comprising:
at a video encoding apparatus having memory and one or more processors:
setting frame types for a plurality of video frames in a video sequence;obtaining a video frame set as a B frame from the plurality of video frames;determining whether a current macroblock of the video frame satisfies a Direct prediction mode, and when the current macroblock satisfies the Direct prediction mode, further determining whether the current macroblock satisfies a Skip prediction mode;if the current macroblock does not satisfy the Direct prediction mode or the current macroblock does not satisfy the Skip prediction mode, computing at least one of a plurality of mode costs, including:
a mode cost after performing motion compensation on the current macroblock using two bidirectional prediction motion vectors obtained in the Direct prediction mode;a mode cost after performing motion compensation on the current macroblock using a forward prediction motion vector obtained in the Direct prediction mode; anda mode cost after performing motion compensation on the current macroblock using a backward prediction motion vector obtained in the Direct prediction mode; andselecting a mode with a smallest cost in the plurality of mode costs as an optimal prediction direction to encode the current macroblock.