Digital signal switching apparatus and method of switching digital signals

摘要

A digital signal switching apparatus is provided. The digital signal switching apparatus inputs and outputs digital signals to which status information formed of a block including a plurality of frames is added. The digital signal switching apparatus includes: a retrieving unit configured to retrieve the status information from the digital signal to which switching processing was performed; a storing unit configured to store one or more blocks of the status information retrieved by the retrieving unit; and an adding unit configured to add again the status information stored in the storing unit by the block to a position of the status information in the digital signal to which the switching processing was performed.