Patent ID: 8064519
Filing Date: 2011-11-22
Classification: H04N

Abstract:
1. A moving picture decoding method for decoding a coded picture, wherein in said moving picture decoding method, a picture is decoded by one of an intra picture decoding method and an inter picture decoding method, and when a picture is decoded by the inter picture decoding method, at least one of the following pictures is selected as a reference picture: an intra decoded picture which is decoded by the intra picture decoding method; a picture located before the intra decoded picture in display order; and a picture located after the intra decoded picture in display order, said moving picture decoding method comprises: decoding a coded picture to obtain a decoded picture; decoding information indicating that the intra decoded picture is specified as a specified picture which is used for restricting selection of the reference picture; and specifying the decoded picture as the specified picture based on the information; wherein, in case where the decoded picture is specified as the specified picture in said specifying, for a picture to be decoded by the inter picture decoding method after the specified picture, at least one of the following pictures is selected as the reference picture in said decoding of the coded picture: the specified picture and a picture which is decoded after the specified picture, while a picture which has been decoded before the specified picture is prohibited from being selected as the reference picture, and in case where the decoded picture is an intra decoded picture which is not specified as the specified picture in said specifying, for a picture to be decoded by the inter picture decoding method after the intra decoded picture which is not specified as the specified picture, at least one of the following pictures is selected as the reference picture in said decoding of the coded picture: the intra decoded picture which is not specified as the specified picture, a picture located before, in display order, the intra decoded picture which is not specified as the specified picture, and a picture located after, in display order, the intra decoded picture which is not specified as the specified picture.