1. A playback apparatus comprising: a first memory; a multimedia processor configured to use the first memory as a work memory, and to allocate a first stream buffer area in the first memory, the first stream buffer area configured to store a stream of encoded video data, and the multimedia processor comprising a decoding circuit configured to decode the stream of encoded video data and an arithmetic module configured to execute super-resolution conversion in order to increase the number of pixels of the decoded video data; an issuing module configured to issue a switching request in order to switch between execution and non-execution of the super-resolution conversion; a second memory; and a main processor configured to use the second memory as a work memory, to execute a decoding program application for decoding the stream of encoded video data, and to execute a switching program application configured to switch a destination of the encoded video data where the decoding is executed between the multimedia processor and the decoding program application such that a picture group which is a unit for managing the encoded video data is not divided, in response to the switching request issued from the issuing module, wherein the decoding program application is configured to allocate a second stream buffer area in the second memory for storing a stream of the encoded video data and a decoding buffer area in the second memory for storing data related to decoding, and wherein the switching program application is configured to switch the destination from the multimedia processor to the decoding program application in a state that data is not stored in the stream buffer area of the first memory, and to switch the destination from the decoding program application to the multimedia processor in a state that data is not stored in the stream buffer area and the decode buffer area in the second memory.