FAST MULTIPLE REFERENCE FRAME SELECTION METHOD IN MOTION ESTIMATION FOR H.264 VIDEO ENCODING

摘要

A fast multiple reference frame selection method in a motion estimation for H.264 coding is provided to solve difficulty in embodying a real-time encoder by reducing a calculation quantity of the motion estimation which occupies most of time during the coding according to H.264 standard. A motion estimation of a macro block is performed for N available reference frames in an inter 16x16 mode(S100). Costs of the N available reference frames are calculated, and the certain number of the reference frames is selected in order that costs of the reference frames are low(S110). The motion estimation of the macro block is performed for the selected reference frames in an inter 16x8 mode(S120). An optimum reference frame is selected in the inter 16x8 mode(S130). The motion estimation of the macro block is performed for the selected reference frames in an inter 8x16 mode(S140). An optimum reference frame is selected in the inter 8x16 mode(S150). The motion estimation of the macro block is performed for the optimum reference frame selected in the inter 16x8 mode and the optimum reference frame selected in the inter 8x16 mode in an inter 8x8 mode or less(S160).