Communication system, transmitting apparatus, receiving apparatus, communication method, and record medium

A transmitting apparatus, comprising:

• a changer for changing a sending time period of a time stamp packet for filing time information;
• and
• a transmission unit for transmitting said time stamp packet at its changed sending time period to a time stamp packet receiving apparatus via a packet network.

A receiving apparatus, comprising:

• a unit for receiving a time stamp packet in which at least an absolute time of a transmission source has been inserted, said time stamp packet being transmitted from a time stamp packet transmitting apparatus at a changed sending time period;
• and
• a classifier for making a frequency classification from the sending time period of said received time stamp packet.

A communication method, comprising:

• a change process of changing a sending time period of a time stamp packet for filing time information;
• and
• a transmission process of transmitting said time stamp packet at said changed sending time period to a time stamp packet receiving apparatus via a packet network.

A record medium readable by an information processing device, said record medium having a program recorded therein for causing the information processing device to execute:

• changing a sending time period of a time stamp packet for filing time information;
• and
• transmitting said time stamp packet at its changed sending time period to a time stamp packet receiving apparatus via a packet network.

A record medium readable by an information processing device, said record medium having a program recorded therein for causing the information processing device to execute:

• receiving a time stamp packet in which at least an absolute time of a transmission source has been inserted, said time stamp packet being transmitted from a time stamp packet transmitting apparatus at a changed sending time period;
• and
• making a frequency classification from the sending time period of said received time stamp packet.