Patent ID: 7423672
Filing Date: 2008-09-09
Classification: H04N

Abstract:
1. A picture data playback apparatus comprising: acquisition unit for acquiring main picture data having a first resolution, sub-picture data having the first resolution, and sub-picture data having a second resolution lower than the first resolution, without acquiring main picture data having the second resolution; conversion unit for converting the main picture data having the first resolution into the main picture data having the second resolution; first synthesis unit for synthesizing the main picture data having the first resolution, which has been acquired by the acquisition unit, and has not been converted by the conversion unit, with the sub-picture data having the first resolution, which has been acquired by the acquisition unit, and has not been converted by the conversion unit, to obtain first synthesized data having the first resolution; second synthesis unit for synthesizing the main picture data having the second resolution which has not been acquired by the acquisition unit, and has been generated by conversion by the conversion unit, with the sub-picture data having the second resolution which has been acquired by the acquisition unit, and has not been converted by the conversion unit, to obtain second synthesized data having the second resolution.