Patent ID: 8544055
Filing Date: 2013-09-24
Classification: H04L,H04N

Abstract:
1. A communication apparatus comprising: a transmission unit that transmits video data to an external apparatus; a command processing unit that transmits a first command to the external apparatus, wherein the first command includes a command for causing the external apparatus to display video data to be transmitted from the transmission unit to the external apparatus; an acquisition unit that acquires a first physical address from predetermined information of the external apparatus; and a control unit that (a) determines whether or not a third command is received from the external apparatus by the command processing unit, (b) determines whether or not a fourth command is received by the command processing unit after the third command is received from the external apparatus, (c) determines whether or not the first physical address is acquired from the predetermined information if the command processing unit does not receive the fourth command after the third command is received, (d) determines whether or not a second physical address is acquired from a second command, received by the command processing unit, if the command processing unit does not receive the fourth command after the third command is received, (e) determines whether or not the first physical address matches the second physical address if the command processing unit does not receive the fourth command after the third command is received, and (f) controls the command processing unit to transmit the first command including the first physical address to the external apparatus if the first physical address matches the second physical address, wherein the second command includes a command indicating that the external apparatus displays video data to be transmitted to the external apparatus from the transmission unit, the third command includes a command for requesting the first command, the fourth command includes a command indicating that the external apparatus displays video data to be transmitted to the external apparatus from a transmission apparatus, and the transmission apparatus is different from the communication apparatus; a first detection unit that performs a process for detecting a first signal indicating a state where the external apparatus allows the communication apparatus to acquire the predetermined information; and a second detection unit that performs a process for detecting a second signal indicating a state where the external apparatus displays video data to be transmitted from the transmission unit to the external apparatus.