VIDEO PROCESSORS FOR PRESERVING DETAIL IN LOW-LIGHT SCENES

摘要

Video coding systems and methods are provided that protect against various artifacts (e.g., banding artifacts) in decoded frame content. The embodiments to protect against introducing artifacts include pre-processing the input video frame, controlling the encoding parameters and/or post-processing the decoded video frame. A method for encoding a frame may include calculating a dark-scene score for the frame based on measured statistics of the frame. The dark-scene score may be compared to a threshold to determine if the banding artifacts may be present in the frame. Based on the comparison, filtering parameters for the frame may be altered to reduce the amount of noise filtered from the frame. The frame may be filtered based on the altered filtering parameters and encoded.

主权项

1. A method for encoding a frame in a sequence of frames, comprising:
measuring statistics of the frame; calculating a dark-scene score for the frame based on the measured statistics; comparing the dark-scene score to a threshold; based on the comparison, altering filtering parameters from for the frame from a default level to reduce an amount of noise filtered from the frame; filtering the frame based on the altered filtering parameters; and encoding the filtered frame.