Transparent block skipping in object-based video coding systems

摘要

A method implemented in an object-based video encoder or decoder uses shape information that describes the boundary of a group of pixels representing an object in a sequence of video frames to identify transparent blocks (e.g., macroblocks or blocks so that coding/decoding of these blocks can be skipped. In the object-based video coding method, encoders code shape separately from motion and texture, and shape information is available before the encoder/decoder codes/decodes texture and motion data. The encoder and decoder use this shape information to identify transparent macroblocks or blocks so that texture coding and possible motion coding can be skipped. This method for transparent block skipping reduces coding and decoding operations and reduces the number of bits needed to store a bitstream representing a compressed video sequence.