Moving picture decoding apparatus

A moving picture decoding method for decoding an inputted coded moving picture stream with reference to previously decoded macroblock information that is information on a macroblock basis and includes at least motion vector information, said moving picture decoding method comprising:

• judging whether or not an error is present in the coded moving picture stream;
• decoding a current picture to be decoded included in the coded moving picture stream, so as to generate picture data;
• and
• storing macroblock information of the coded moving picture stream and the decoded picture data in association with each other,
• wherein in said storing, when it is judged in said judging that the error is present, information indicating the presence of the error is stored in association with the macroblock information, and
• in said decoding, a decoding operation is modified when the macroblock information is the macroblock information in which the error is present, in the case of decoding the coded moving picture stream in a decoding mode in which decoding is performed with reference to macroblock information of a previously decoded picture.

A non-transitory computer-readable medium having a program stored thereon for a moving picture decoding apparatus which decodes an inputted coded moving picture stream with reference to previously decoded macroblock information that is information on a macroblock basis and includes at least motion vector information,

• wherein the moving picture decoding apparatus includes:
• a storage unit which stores (i) macroblock information that includes at least motion vector information and is described in the coded moving picture stream on a macroblock basis and (ii) previously decoded picture data of a picture that includes the macroblock, in association with each other;
• a judging unit configured to judge whether or not an error is present in the coded moving picture stream;
• a decoding unit configured to decode the current picture to be decoded included in the coded moving picture stream, so as to generate picture data;
• and
• a storage unit configured to store the macroblock information of the coded moving picture stream and the generated decoded picture data in association with each other, and
• said program causes a computer to execute:
• storing, in said storage unit, information indicating the presence of the error, in association with the macroblock information, when the judging unit judges that the error is present;
• and
• modifying the decoding operation, by said decoding unit, when the macroblock information is the macroblock information in which the error is present, in the case of decoding the coded moving picture stream in a decoding mode in which decoding is performed with reference to macroblock information of a previously decoded picture.

An integrated circuit which is used for a moving picture decoding apparatus which decodes an inputted coded moving picture stream with reference to previously decoded macroblock information that is information on a macroblock basis and includes at least motion vector information, said integrated circuit comprising:

• a judging unit configured to judge whether or not an error is present in the coded moving picture stream;
• a decoding unit configured to decode a current picture to be decoded included in the coded moving picture stream, so as to generate picture data;
• and
• a storage unit configured to store the macroblock information of the coded moving picture stream and the decoded picture data in association with each other,
• wherein said storage unit is configured to store, when said judging unit judges that the error is present, information indicating the presence of the error, in association with the macroblock information, and
• said decoding unit is configured to modify a decoding operation when the macroblock information is the macroblock information in which the error is present, in the case of decoding the coded moving picture stream in a decoding mode in which decoding is performed with reference to macroblock information of a previously decoded picture.