Predicted motion vectors

摘要

A video encoder includes an entropy encoder that computes a predicted motion vector (PMV) for each of a plurality of macroblocks in a video frame based on motion vectors of multiple other macroblocks. The video encoder also includes a motion estimator that determines a predicted motion vector for a given macroblock by reusing, as the predicted motion vector for the given macroblock, only the PMV computed by the entropy encoder for a macroblock immediately on top of the given macroblock.

主权项

1. A video encoder, comprising:
an entropy encoder that receives transformed and quanitized residuals of each of a plurality of macroblocks, entropy encodes each macroblock and computes an initial predicted motion vector (PMV) for each macroblock in a video frame based on motion vectors of multiple other macroblocks prior to a current macroblock in encoding order; a buffer and/or memory storing the computed initial predicted motion vectors of the video frame; and a motion estimator that determines a predicted motion vector for a given macroblock by reusing, as the predicted motion vector for the given macroblock, only the initial PMV computed by the entropy encoder for a macroblock immediately on top of the given macroblock stored in the buffer and/or memory.