Digital signal transmission method digital signal transmission system, digital signal transmitting apparatus and recording medium

A digital signal transmitting apparatus for transmitting a predetermined digital signal to an electronic equipment connected through a predetermined transmission line, comprising

• a mode setting means for setting a sending mode of said digital signal, and
• a transmitting means for communicating with said electronic equipment connected through said transmission line and also sending out mode date on modes which can be set by said mode setting means.

A digital signal transmitting apparatus for receiving a predetermined digital signal transmitted from an electronic equipment connected through a predetermined transmission line, comprising

• a control means for producing a command to inquire of said electronic equipment connected through said transmission line about data on modes in which said digital signal can be sent out, and
• a transmitting means for sending out the command produced by said control means to said transmission line.

A digital signal transmitting apparatus for transmitting a predetermined digital signal to an electronic equipment connected through a predetermined transmission line, comprising

• a sending rate control means for controlling the sending rate of said digital signal,
• an output means for communicating with said electronic equipment connected through said transmission line and also outputting said digital signal under the control of said sending rate control means, and
• a flag adding means for adding a flag to said digital signal sent out at its predetermined position, which indicates that the sending rate is being controlled.

A digital signal transmitting apparatus for receiving a predetermined digital signal transmitted from an electronic equipment connected through said transmission line and also extracting flag added to received data at its predetermined position, and

• a control means for producing an adjusting command to cause said electronic equipment connected through said transmission line to adjust a transmission rate of said digital signal and transmitting said adjusting command to said electronic equipment through said transmission line, if the flag extracted is under a predetermined condition.

A recording medium on which a program controlling the transmission of a predetermined digital signal between at least a first electronic equipment and a second electronic equipment is recorded, the recorded program comprising steps of

• an inquiry command sending step in which the inquiry command for inquiring about modes of said digital signal that said first electronic equipment can send out is caused to be sent to said first electronic equipment,
• a mode data acquiring step in which, based on a response to said inquiry command, mode data on the modes of said digital signal that said first electronic equipment can send out is caused to be acquired, and a mode setting step in which, based on said mode data, the mode of said digital signal of said first electronic equipment is caused to be set.

A recording medium on which a program for controlling the transmission of a predetermined digital signal between at least a first electrode equipment and a second electronic equipment is recorded, the recorded program comprising steps of

• a mode date sending step in which, in response to an inquiry command, mode data on the modes of said digital signal that said first electronic equipment can send out is sent, and
• a mode setting step in which, in response to an command for causing a desired mode based on said mode data to be set, the mode of said signal of said first electronic equipment is caused to be set.