Non-zero rounding and prediction mode selection techniques in video encoding

Abstract

In one aspect of this disclosure, 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 of this disclosure, techniques are described for selecting among default weighted prediction, implicit weighted prediction, and explicit weighted prediction. In this context, techniques are also described for adding offset to prediction data, e.g., using the format of explicit weighted prediction to allow for offsets to predictive data that is otherwise determined by implicit or default weighted prediction.

Description

[0001] The following co-pending and commonly-assigned applications are expressly incorporated herein by reference: Marta Karczewicz, Peisong Chen, and Yan Ye, Attorney Docket No. 082069U2, "Insufficient Zero Rounding and Prediction Mode Selection Techniques (Non-Zero Rounding And Prediction Mode Selection Techniques In Video Encoding)". technical field [0002] This disclosure relates to video coding, and more particularly, to video coding techniques using bi-directional prediction. Background technique [0003] Digital multimedia capabilities can be incorporated into a wide range of devices, including digital television, digital broadcast systems, wireless communication devices, wireless broadcast systems, personal digital assistants (PDAs), laptop or desktop computers, digital cameras, digital Recording devices, video game devices, video game consoles, cellular or satellite radiotelephones, digital media players, and the like. Digital multimedia devices may implement vide...

AI Technical Summary

Problems solved by technology

Newer encoding formats and standards may not limit the prediction direction of P or B frames

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