A method and apparatus for transmitting and receiving an MPEG-2 TS-based media file are provided. In the method of transmitting an MPEG2 Transport Stream (TS)-based media file, a Presentation Time Stamp (PTS) of a Presentation Unit (PU) is mapped to a Media Presentation Time (MPT) for synchronization with other media with respect to at least one program element forming a program included in the media file; and synchronization information including the mapped media presentation time is transmitted together with the media file, wherein the media presentation time is provided for a first PU in a segment of the transmitted media file.

An image processing system comprises a master image processing apparatus provided with an image forming section for processing an image and a slave image processing apparatus provided with an image forming section for forming an image. The master image processing apparatus comprises a first user information storage section which stores user information, an acquisition section, a first user information update section which updates the user information stored in the first user information storage section according to the user information acquired by the acquisition section and a sending section which sends the user information acquired by the acquisition section to the slave image processing apparatus. A second user information storage section of the slave image processing apparatus stores the user information. A second user information update section updates the user information stored in the second user information storage section according to the user information received by a receiving section.

An image processing system comprises a master image processing apparatus provided with an image forming section for processing an image and a slave image processing apparatus provided with an image forming section for forming an image. The master image processing apparatus comprises a first user information storage section which stores user information, an acquisition section, a first user information update section which updates the user information stored in the first user information storage section according to the user information acquired by the acquisition section and a sending section which sends the user information acquired by the acquisition section to the slave image processing apparatus. A second user information storage section of the slave image processing apparatus stores the user information. A second user information update section updates the user information stored in the second user information storage section according to the user information received by a receiving section.

An image processing system comprises a master image processing apparatus provided with an image forming section for processing an image and a slave image processing apparatus provided with an image forming section for forming an image. The master image processing apparatus comprises a first user information storage section which stores user information, an acquisition section, a first user information update section which updates the user information stored in the first user information storage section according to the user information acquired by the acquisition section and a sending section which sends the user information acquired by the acquisition section to the slave image processing apparatus. A second user information storage section of the slave image processing apparatus stores the user information. A second user information update section updates the user information stored in the second user information storage section according to the user information received by a receiving section.

An image processing system comprises a master image processing apparatus provided with an image forming section for processing an image and a slave image processing apparatus provided with an image forming section for forming an image. The master image processing apparatus comprises a first user information storage section which stores user information, an acquisition section, a first user information update section which updates the user information stored in the first user information storage section according to the user information acquired by the acquisition section and a sending section which sends the user information acquired by the acquisition section to the slave image processing apparatus. A second user information storage section of the slave image processing apparatus stores the user information. A second user information update section updates the user information stored in the second user information storage section according to the user information received by a receiving section.

A server 100 capable of surely synchronizing MFPs 102 and 103. The server 100 writes a first time that the server 101 measures in response to storing of information changed in the MFP 102. When the time that the server 101 measures is changed, a time difference between the time before the change and the time after the change is calculated. A modified first time is acquired by applying the calculated time difference to the written first time when the time that the server 101 measures is changed after the first time has been written. When the modified first time is a time between a time when a previous inquiry was received from the MFP 103 and a time when a current inquiry from the MFP 103 is received, the information indicating the content of the changed information is transmitted to the MFP 103.

A server 100 capable of surely synchronizing MFPs 102 and 103. The server 100 writes a first time that the server 101 measures in response to storing of information changed in the MFP 102. When the time that the server 101 measures is changed, a time difference between the time before the change and the time after the change is calculated. A modified first time is acquired by applying the calculated time difference to the written first time when the time that the server 101 measures is changed after the first time has been written. When the modified first time is a time between a time when a previous inquiry was received from the MFP 103 and a time when a current inquiry from the MFP 103 is received, the information indicating the content of the changed information is transmitted to the MFP 103.