When a connection mode change setting instruction input entered by a user
is supplied to the control unit 20, the control unit 20 controls the IEEE
1394 I/F circuit to set the value of oPCR and iPCR of an electronic
apparatus for forming a channel so that the channel between target
electronic apparatus is formed in the connection mode instructed by the
user. Thereby, a channel between electronic apparatus is formed flexibly
and an information output apparatus that is capable of forming a
convenient electronic apparatus network is provided. One electronic
apparatus connected to the digital bus inquires of an electronic
apparatus connected to the digital bus whether it is a monitor apparatus
(first receiving apparatus) that receives the data mainly through a
channel formed in the broadcast connection mode or not, and channels
connected in the broadcast connection mode are allocated to monitor
apparatus respectively. A receiving apparatus other than the monitor
apparatus forms a channel of the PtoP mode avoiding the channel of the
first connection mode allocated to the first receiving apparatus, and
receives supply of the data. As the result, a transmission line using
method, an information transmission system, and an electronic apparatus
that are capable of utilizing a plurality of channels on the digital bus
efficiently, and capable of providing the convenient digital content
using environment are realized.