Presented are systems and methods for presenting, creating, and pausing a meeting session. The AD structure includes registers which hold values indicating the sample size and the sample rate for the conversion. When the user has decided on acquiring the non-sample regular contents and performed a predetermined operation to acquire the contents, the non-sample regular contents are distributed from the server to the user via the communication network, at which time unique additional information, such as client information and serial number, is attached to the individual distributed contents. If the snoop results indicate that the information is not valid among caches in that remote node, or will be flushed due to the CDAT, the system memory directory in the home node of the multiprocessor link is notified and changes state in response to this.