The present invention relates to a method and an apparatus for processing a video signal, the method comprising: receiving a multiview video signal; identifying whether a current picture including a first layer and a second layer is decoded by using alpha data within the multiview video signal; obtaining the alpha data corresponding to the first layer and the second layer when the current picture is identified to be decoded by using the alpha data; and decoding a current block included in the current picture by using the alpha data, wherein the alpha data may include information concerning transparency information of the current picture.