Patent ID: 7917237
Filing Date: 2011-03-29
Classification: G10L

Abstract:
1. A receiving apparatus that receives compressed music data first and then music information concerning the compressed music data, in a transmission order of the music information first and the compressed music data next, wherein the compressed music data is one of (i) compressed music data including compressed basic music data made in a first mode and (ii) compressed music data including the basic music data and high frequency information made in a second mode, the high frequency information being used to extend high frequency of the basic music data, and the music information includes a value indicating the mode used to make the compressed music data, the receiving apparatus comprising: a compressed music data analyzing unit configured to analyze the value indicating the mode used to make the compressed music data, receive the music information and the compressed music data using a transmission clock corresponding to a sampling frequency of the basic music data, and obtain the sampling frequency based on the received transmission clock; a D/A converter configured to convert a signal from digital to analog based on the compressed music data; an output control unit configured to previously set a sampling frequency of a predetermined magnification in the D/A converter, based on the sampling frequency notified by the compressed music data analyzing unit and the mode of the compressed music data; a basic signal decoding unit configured to decode the basic music data; a high frequency signal reconstructing unit configured to reconstruct the high frequency signal based on the high frequency information in the case of the second mode; and a band spreading unit configured to output a signal decoded by the basic signal decoding unit in the case of the first mode, and output a signal obtained by synthesizing the signal decoded by the basic signal decoding unit with the high frequency signal reconstructed by the high frequency signal reconstructing unit in the case of the second mode, wherein the D/A converter converts the signal from digital to analog, the signal being outputted by the band spreading unit using the previously set sampling frequency, and the receiving apparatus further comprising a high frequency signal generating unit configured to generate a high frequency signal based on the basic music data, and wherein the output control unit is configured to cause the band spreading unit to (i) synthesize the signal decoded by the basic signal decoding unit in the case of the first mode with the high frequency signal generated by the high frequency signal generating unit and (ii) output the synthesized signal, and configured to control the operation of the D/A converter.