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

A digital signal transmission method for causing a second electronic equipment to receive a predetermined digital signal sent out of a fist first electronic equipment comprising steps of:

• a receiving step for receiving a command to set a mode of said first electronic equipment to a mode of out putting at a desired transmission rate;
• a mode setting step for setting the mode of said first electronic equipment to the mode of outputting at the desired transmission rate based on said command received;
• a digital signal sending step for sending out the digital signal at said desired transmission rate based on the mode set in said mode setting step;
• and
• a flag adding step for adding to said digital signal sent out a flag which indicates that a transmission rate is being adjusted.

A digital signal transmission system in which a predetermined digital signal sent out of a first electronic equipment is received by a second electronic equipment connected thereto by means of a predetermined transmission line which is capable of bidirectional communication, wherein

• said first electronic equipment comprises:
• a mode setting means for setting a sending mode of said digital signal;
• a mode controlling means for performing the control in accordance with the mode set by said mode setting means;
• and
• a sender transmitting means for communicating with a partner connected by said transmission line, and
• said second electronic equipment comprises:
• a transmission control means for controlling the transmission of said digital signal;
• a destination transmitting means for communicating with a partner connected by said transmission line;
• said destination transmitting means sends out an inquiry command for inquiring about data concerning a mode of said first electronic equipment at the request of said transmission control means of said second electronic equipment and in response to a command from said first electronic equipment for said inquiry command;
• said sender transmitting means sends out mode data concerning said mode of said first electronic equipment based on said inquiry command;
• said destination transmitting means sends out a mode setting command for setting a mode selected by said transmission control means of said second electronic equipment in accordance with said mode date data transmitted;
• and
• said mode setting means of said first electronic equipment sets a mode for transmitting said digital signal based on said mode setting command.

A digital signal transmission system in which a predetermined digital signal sent out of a first electronic equipment is received by a second electronic equipment connected thereto through a predetermined transmission line which is capable of bidirectional communication, wherein:

• said fist first electronic equipment comprises a sending control means for controlling conditions of said digital signal sent out, and
• a sender transmitting means for communicating with a partner connected through said transmission line;
• second electronic equipment comprises
• a receiving control means for controlling conditions of said digital signal received, and
• a destination transmitting means for communicating with a partner connected through said transmission line;
• and
• a flag is added to said digital signal sent out of said sender transmitting means at its predetermined position, which indicates that a transmission rate is being adjusted based on a command from said receiving control means of said digital signal destination second electronic equipment.

A method for causing a second apparatus to receive a predetermined digital signal sent from a first apparatus, comprising the steps of:

• receiving from said first apparatus a command for an inquiry;
• sending to said first apparatus an inquiry command to inquire about attribute modes of the digital signal that can be sent from said first apparatus;
• receiving from said first apparatus responsive to said inquiry command, attribute mode data representing the attribute modes of the digital signal that can be sent from said first apparatus;
• selecting from said attribute mode data a desired attribute mode of said digital signal;
• and
• sending to said first apparatus an attribute mode request that specifies said selected attribute mode of the digital signal to be transmitted to said second apparatus.

A method for causing a first apparatus to send a predetermined digital signal to a second apparatus, comprising the steps of:

• transmitting to the second apparatus a command requesting the second apparatus to send an inquiry command
• receiving from the second apparatus the inquiry command inquiring about attribute modes of the digital signal that can be sent from said first apparatus;
• sending to the second apparatus, in response to said inquiry command, attribute mode data representing the attribute modes of the digital signal that can be sent from said first apparatus;
• receiving an attribute mode request specifying an attribute mode selected by the second apparatus;
• and
• transmitting the digital signal using the selected attribute mode.

A system in which a predetermined digital signal sent from a first apparatus is received by a second apparatus,

• wherein said first apparatus comprises:
• i) means for transmitting to the second apparatus a command requesting the second apparatus to send an inquiry command;
• ii) means for receiving from the second apparatus the inquiry command inquiring about attribute modes of the digital signal that can be sent from said first apparatus;
• iii) means for sending to the second apparatus, in response to said inquiry command, attribute mode data representing the attribute modes of the digital signal that can be sent from said first apparatus;
• iv) means for receiving an attribute mode request specifying an attribute mode selected by the second apparatus;
• and
• v) means for transmitting the digital signal using the selected attribute mode, and
• wherein said second apparatus comprises:
• i) means for sending to said first apparatus said inquiry command;
• ii) means for receiving from said first apparatus responsive to said inquiry command, said attribute mode data;
• iii) means for selecting from said attribute mode data a desired attribute mode of said digital signal;
• and
• iv) means for sending to said first apparatus the attribute mode request that specifies said selected attribute mode of the digital signal to be transmitted to said second apparatus.

A second apparatus for receiving a predetermined digital signal transmitted from a first apparatus, the second apparatus comprising:

• means for receiving from said first apparatus a command for an inquiry;
• means for sending to said first apparatus the inquiry command to inquire about attribute modes of the digital signal that can be sent from said first apparatus;
• means for receiving from said first apparatus responsive to said inquiry command, attribute mode data representing the attribute modes of the digital signal that can be sent from said first apparatus;
• means for selecting from said attribute mode data a desired attribute mode of said digital signal;
• and
• means for sending to said first apparatus an attribute mode request that specifies said selected attribute mode of the digital signal to be transmitted to said second apparatus.

A first apparatus for transmitting a predetermined digital signal to a second apparatus, the first apparatus comprising:

• means for transmitting to the second apparatus a command requesting the second apparatus to send an inquiry command;
• means for receiving from the second apparatus the inquiry command inquiring about attribute modes of the digital signal that can be sent from said first apparatus;
• means for sending to the second apparatus, in response to said inquiry command, attribute mode data representing the attribute modes of the digital signal that can be sent from said first apparatus;
• means for receiving an attribute mode request specifying an attribute mode selected by the second apparatus;
• and
• means for transmitting the digital signal using the selected attribute mode.

A non-transitory computer-readable storage medium, carrying a processing program stored thereon, which when executed, causes a second apparatus to execute a process of receiving a predetermined digital signal transmitted from a first apparatus, the process comprising the steps of:

• receiving from said first apparatus a command for an inquiry;
• sending to said first apparatus an inquiry command to inquire about attribute modes of the digital signal that can be sent from said first apparatus;
• receiving from said first apparatus responsive to said inquiry command, attribute mode data representing the attribute modes of the digital signal that can be sent from said first apparatus;
• selecting from said attribute mode data a desired attribute mode of said digital signal;
• and
• sending to said first apparatus an attribute mode request that specifies said selected attribute mode of the digital signal to be transmitted to said second apparatus.

A non-transitory computer-readable storage medium, carrying a processing program stored thereon, which when executed, causes a first apparatus to execute a process of transmitting a predetermined digital signal to a second apparatus, the process comprising the steps of:

• transmitting to the second apparatus a command for an inquiry;
• receiving from the second apparatus an inquiry command inquiring about attribute modes of the digital signal that can be sent from said first apparatus;
• sending to the second apparatus, in response to said inquiry command, attribute mode data representing the attribute modes of the digital signal that can be sent from said first apparatus;
• receiving an attribute mode request specifying an attribute mode selected by the second apparatus;
• and
• transmitting the digital signal using the selected attribute mode.