A method for coding a video signal, comprising: determining spatially adjacent motion information of a parallel motion processing region PR, which comprises a plurality of image blocks; determining temporally adjacent motion information of a current block, wherein the current block is located in the parallel motion processing region PR; determining a candidate motion information set of the current block according to the spatially adjacent motion information of the parallel motion processing region PR and the temporally adjacent motion information of the current block; selecting motion information of the current block from the candidate motion information set, and sending a motion information indication of the current block to a decoding end, so as to assist the decoding end in determining the motion information of the current block; and performing motion compensation coding for the current block according to the motion information of the current block; characterized in that the determining a candidate motion information set of the current block according to the spatially adjacent motion information of the parallel motion processing region PR and the temporally adjacent motion information of the current block comprises: selecting first motion information and second motion information from the spatially adjacent motion information or temporally adjacent motion information, to obtain a piece of new motion information, which is bi-directional motion information, where the first motion information includes a forward motion vector and a corresponding forward reference image index, and the second motion information includes a backward motion vector and a corresponding backward reference image index, wherein the bi-directional motion information is a combination of the first motion information and the second motion information and used as an element of the candidate motion information set of the current block. determining spatially adjacent motion information of a parallel motion processing region PR, which comprises a plurality of image blocks; determining temporally adjacent motion information of a current block, wherein the current block is located in the parallel motion processing region PR; determining a candidate motion information set of the current block according to the spatially adjacent motion information of the parallel motion processing region PR and the temporally adjacent motion information of the current block; selecting motion information of the current block from the candidate motion information set, and sending a motion information indication of the current block to a decoding end, so as to assist the decoding end in determining the motion information of the current block; and performing motion compensation coding for the current block according to the motion information of the current block; characterized in that the determining a candidate motion information set of the current block according to the spatially adjacent motion information of the parallel motion processing region PR and the temporally adjacent motion information of the current block comprises: selecting first motion information and second motion information from the spatially adjacent motion information or temporally adjacent motion information, to obtain a piece of new motion information, which is bi-directional motion information, where the first motion information includes a forward motion vector and a corresponding forward reference image index, and the second motion information includes a backward motion vector and a corresponding backward reference image index, wherein the bi-directional motion information is a combination of the first motion information and the second motion information and used as an element of the candidate motion information set of the current block. selecting first motion information and second motion information from the spatially adjacent motion information or temporally adjacent motion information, to obtain a piece of new motion information, which is bi-directional motion information, where the first motion information includes a forward motion vector and a corresponding forward reference image index, and the second motion information includes a backward motion vector and a corresponding backward reference image index, wherein the bi-directional motion information is a combination of the first motion information and the second motion information and used as an element of the candidate motion information set of the current block.