Video decoding device and video decoding method

A video reproduction apparatus comprising:

• an input configured to receive a video signal including encoded video data;
• a demultiplexer configured to separate the encoded video data from the video signal;
• a video decoding device configured to decode a plurality of pictures included in the encoded video data, the video decoding device comprising:
• a decoder configured to decode a plurality of separate partial areas of each of pictures included in the encoded video data and a motion vector indicating a positional relationship between each of the partial areas and a partial area of a different picture referenced in order to encode the partial area;
• an error detector configured to detect, as an error area, a partial area that is unable to be decoded by the decoder from among the plurality of partial areas;
• a referenced area determiner configured to, when the error area is included in a first picture, determine, using the motion vector of a partial area included in a second picture that is subsequent to the first picture in the order in which the pictures are decoded, a referenced area of a third picture that has already been decoded, where the referenced area corresponds to the error area;
• a concealment unit configured to conceal the error area using data contained in the referenced area;
• and
• an image integrator configured to reproduce the first picture by arranging the concealed error area and the decoded partial areas included in the first picture in a predetermined order;
• and
• a display configured to display a plurality of decoded pictures in accordance with an order in which the pictures are played back.

A video decoding method comprising:

• decoding a plurality of separate partial areas of each of pictures included in encoded video data and a motion vector indicating a positional relationship between each of the partial areas and a partial area of a different picture referenced in order to encode the partial area;
• detecting, as an error area, a partial area that is unable to be decoded from among the plurality of partial areas;
• determining a referenced area of a third picture that has already been decoded, the referenced area corresponding to the error area, when the error area is included in a first picture, using the motion vector of a partial area included in a second picture that is subsequent to the first picture in the order in which the pictures are decoded;
• concealing the error area using data included in the referenced area;
• and
• reproducing the first picture by arranging the concealed error area and the decoded partial areas included in the first picture in a predetermined order.

A computer-readable recording medium storing a video decoding program that causing a computer to execute a process comprising:

• decoding a plurality of separate partial areas of each of pictures included in encoded video data and a motion vector indicating a positional relationship between each of the partial areas and a partial area of a different picture referenced in order to encode the partial area:
• detecting, as an error area, a partial area that is unable to be decoded from among the plurality of partial areas;
• determining a referenced area of a third picture that has already been decoded, the referenced area corresponding to the error area, when the error area is included in a first picture, using the motion vector of a partial area included in a second picture that is subsequent to the first picture in the order in which the pictures are decoded;
• concealing the error area using data included in the referenced area;
• and
• reproducing the first picture by arranging the concealed error area and the decoded partial areas included in the first picture in a predetermined order.