Receiving apparatus, sending apparatus and transmission system

The sensing device comprises: Of compressed music data output unit, for outputting the shapes of the two types of data, a data of the first mode comprises the inner music data of base music data collector, while a data of the second mode a to the base music data and apparatus for expanding the base music data a high frequency high information a music, dataAnd formatting, a first is transmitted by the compression music data output unit outputs the inner music data, and a comprises an indication according) which is used for with a pressing music data and music information.