Digital data multiplexing apparatus

摘要

The invention provides for digital data multiplexing apparatus including input buffers B1 to Bn of a plurality of channels; occupied amount calculation devices O1 to On for calculating occupied amounts of the input buffers; an occupied amount of buffer comparison device 9 for comparing a threshold value set for respective buffers B1 to Bn in advance and actual occupied amount calculated by the calculation devices O1 to On; and a data selection device 6 for selecting a buffer with a largest occupied amount out of buffers of which occupied amounts have exceeded a threshold value based on results of comparison of occupied amounts 10-1 to 10-m of the comparison device 9 and outputting the data.