VIDEO TRANSCODING OPTIMIZATIONS USING HIGH FREQUENCY FRAME ANALYSIS

摘要

Disclosed is a method for video transcoding optimization using extraction of high-frequency information for each frame. The method for video transcoding comprises the steps of: calculating a quantification index representing high-frequency information for each frame in which video content is coded at different bit rates; comparing the quantification index with a video quality estimation index, which is obtained by digitizing a video quality difference between scenes coded at the different bit rates through subjective scoring, to deduce the relationship between the quantification index and the video quality estimation index; and performing trasncoding of a new video content to be serviced by using the relationship between the quantification index and the video quality estimation index. [Reference numerals] (AA) START; (BB) Image content to be serviced on line; (CC) END; (S11) Perform a subjective test under controlled test conditions; (S12) Deduce a video quality estimation index through user scoring; (S13) Extracting features through an image processing technique; (S14) Deduce a video quality estimation index through quantification of the extracted features; (S15) Compare an image content-specific subjective estimation result with an image processing-based estimation resu (S16) Establish an image quality estimation reference based on the quantification index; (S17) Perform image transcoding based on the quantification index; (S18) Attain low-capacity/low-load encoding