hevc low complexity encoding multiple reference frame selection method

The present invention discloses a low-complexity HEVC encoding multiple reference frame selection method, comprising the steps of: inputting an original coding sequence to encode in units of tree units, selecting the best reference frame wherein each coding unit, as follows : a, if the parent of the current coding unit is a coding unit SKIP mode, the best reference frame coding units of all parent optimal reference frame is the prediction unit of a current coding unit; B, if the parent coding unit of a current coding unit not SKIP mode, the current coding unit is first divided inter-mode prediction unit 2N × 2N multiple reference frame selection, and calculates the 2N × 2N inter division patterns, each reference frame rate distortion costs, all the rate-distortion cost less than a threshold set reference frames of reference frames, selecting the best reference for the rest of the inter-frame division pattern in the reference frame set. The present invention can significantly accelerate the speed of HEVC video coding.