NON-ZERO ROUNDING AND PREDICTION MODE SELECTION TECHNIQUES IN VIDEO ENCODING

摘要

PROBLEM TO BE SOLVED: To provide video encoding and decoding techniques applicable to bi-directional prediction.SOLUTION: Rounding adjustments to bi-directional predictive data may be purposely eliminated to provide predictive data that lacks any rounding bias. In this case, rounded and unrounded predictive data may both be considered in a rate-distortion analysis to identify the best data for prediction of a given video block. In another aspect, techniques are used for selecting from among default weighted prediction, implicit weighted prediction, and explicit weighted prediction. In this context, techniques are also used for adding offset to prediction data, e.g., using the format of explicit weighted prediction to allow offsets to predictive data that is otherwise determined by implicit or default weighted prediction.