Reproduction device, reproduction method, reproduction program, and recording medium

A reproducing apparatus for reproducing contents data, comprising:

• an inputting device configured to input a non-real time stream and a real time stream, the non-real time stream containing at least a program code and image data composing an operation screen that prompts a user to perform an operation, the real time stream containing at least moving picture data and subtitle data;
• a code storing memory configured to store the program code that is input by the inputting device;
• an image data storing memory configured to store the image data that is input by the inputting device and decoded image data, which corresponds to the image data after being decoded;
• a first combining unit implemented by circuitry and configured to make combined data by combining decoded moving picture data of which the moving picture data that is input by the inputting device is decoded and decoded subtitle data of which the subtitle data that is input by the inputting device is decoded;
• and
• a second combining unit implemented by the circuitry and configured to combine the decoded image data stored in the image data storing memory and the combined data of the moving picture data and the subtitle data, combined by the first combining unit, the combining being performed based on the program code stored in the code storing memory.