Adaptive coding structure and adaptive FCode determination in video coding

摘要

A method of encoding a digital video sequence is provided that includes computing a motion vector (MV) histogram and a motion threshold for a first frame of the digital video sequence, and using the MV histogram and the motion threshold for one selected from a group consisting of adaptive fcode determination and adaptive coding structure determination.

主权项

1. A method of encoding a digital video sequence, the method comprising:
computing a motion vector (MV) histogram and a motion threshold for a first frame of the digital video sequence; and using the MV histogram and the motion threshold for one selected from a group consisting of adaptive fixed length code determination and adaptive coding structure determination, wherein the adaptive coding structure determination utilizes a b-frame when the amount of motion is low in the first frame and a p-frame when the amount of motion is high in the first frame; wherein computing the MV histogram comprising:
determining a first number of non-intracoded macroblocks in the first frame having a mean motion vector with an x coordinate value exceeding a first threshold, wherein the first threshold is based on the fixed length code value used for the first frame;determining a second number of non-intracoded macroblocks in the first frame having a mean motion vector with an x coordinate value exceeding a second threshold, wherein the second threshold is based on the fixed length code value used for the first frame;determining a third number of non-intracoded macroblocks in the first frame having a mean motion vector with a y coordinate value exceeding the first threshold; anddetermining a fourth number of non-intracoded macroblocks in the first frame having a mean motion vector with a y coordinate value exceeding the second threshold.