Image and sound reproducing device

An image and sound reproducing device for decoding and reproducing multiplexed data in which main image data, sound data and auxiliary image data which is digitally compressed and encoded is multiplexed, the device comprising:

• a data separating part for separating and processing main image data, auxiliary image data and sound data from multiplexed data;
• a sound decoding part for decoding and processing said sound data which is separated by the data separating part;
• a main image decoding part for decoding and processing main image data which is separated by the data separating part;
• an auxiliary image decoding part for decoding and processing auxiliary image data which is separated by the data separating part;
• a reference clock generating part for calculating progress time after the start of a reproduction from the accumulation of a sound data amount which is output after decoding by the sound decoding part and the attribute information which is analyzed by the sound decoding part and generating a reference clock on the basis of the progress time:
• an auxiliary image output means for controlling an output of the auxiliary image data which is decoded with the auxiliary decoding part on the basis of the reference clock;
• and
• an image superposition means for superposition the auxiliary image data which is output from the auxiliary image output means with the main image data which is decoded with the main image decoding part.