METHOD AND APPARATUS FOR CODING INTERLACED SHAPE INFORMATION

摘要

A method for encoding a binary alpha block (BAB) type of a target block of an interlaced shape signal is provided. After no_update BAB_type which does not require supplemental encoded data is determined, either frame-basis or field-basis encoding is selected as an encoding_type based on a degree of correlation between the target block and its two field blocks. If field basis encoding is selected as encoding_type, it is determined whether or not said two field blocks correspond to one_field_no_update, which indicates at least one fields of said two field blocks require no supplemental data to be transmitted. If said two field blocks are decided as one_field_no_update, top or_bottom and BAB_type_field are detected to be encoded.