File transmission system

Abstract

For improving operability by reducing time for backup of video/audio files through a network, and also for achieving to shorten processing time, as well as, to lower a capacity of a recording medium, by inhibiting unnecessary backup, a file transmission system includes a file list obtaining portion for obtaining a list of files, which are stored in a server, a file transmission controller portion for controlling file transmission, a file transmission requesting portion for requesting a file transmission to the server, a file receiver portion for receiving the file transmitted form the server, and a client file storage portion for storing the files therein, wherein control is made on the file transmission requesting portion, so that it requests a transmission of file(s), excepting the file(s), which is/are stored in the client file storage portion, to the server, upon basis of the list.

What is claimed is: 
     
         1 . A file transmission system, comprising:
 a server, which is configured to conduct file transmission; and   a client, which is connected with said server through a network, wherein   said server comprises:   a server file storage portion, which is configured to store a file therein;   a file list transmitter portion, which is configured to produce a list of files stored within said server file storage portion and transmit it, responding to a request from said client; and   a file transmitter portion, which is configured to transmit a file(s) stored within said server file storage portion, responding to a request from said client, and   said client comprises:   a server detector portion, which is configured to detect that said server is under a condition of being able to transmit a file;   a file list obtaining portion, which is configured to obtain a list of file(s) stored within said server;   a file transmitter controller portion, which is configured to control file transmission;   a file transmission request portion, which is configured to request a file transmission to said server;   a file receiver portion, which is configured to receive the file transmitted from said server; and   a client file storage portion, which is configured to store a file(s) therein, wherein   said file transmission controller portion is started upon detection by said server detector portion, that a new server is under the condition of being able to transmit a file, and controls said file transmission request portion, so as to request a transmission of a file, excepting the file (s) stored within said client file storage portion, to said server, upon basis of said list.