STREAM GENERATING DEVICE, DECODING DEVICE, AND METHOD

摘要

A computation load on a multiple connection device is allowed to be reduced while enhancing the presence at the time of a multiple connection. A stream generating device comprises an input section for inputting two or more encoding signals including the first down-mixed acoustic signals in which the acoustic signals where two or more sound signals are down-mixed are encoded and expansion signals for acquiring the two or more sound signals from the first down-mixed acoustic signals, an encoding signal generating section for generating a second down-mixed acoustic signal for acquiring each of the first down-mixed acoustic signals and the expansion signal for acquiring each of the first down-mixed acoustic signals from the second down-mixed acoustic signals on the basis of each of the encoding signals inputted by the input section and generating an encoding signal including the generated second down-mixed acoustic signals, the generated expansion signals, and each of the expansion signals of each of the inputted encoding signals, and an output section for outputting the generated encoding signal.