Patent ID: 7949762
Filing Date: 2011-05-24
Classification: H04L

Abstract:
1. A communication apparatus which connects to a High-Definition Multimedia Interface (HDMI) cable that is configured to conform to HDMI specifications for establishing a one-way data connection utilized for one-way data transmission to another communication apparatus, and a connection to a network through which messages are transferred in two ways, the communication apparatus comprising: a one-way data connection status detecting unit operable to detect a connection validating request indicating that data transmission, utilizing the one-way data connection, to the other communication apparatus is possible, and a connection invalidating request indicating that the data transmission, utilizing the one-way data connection, to the other communication apparatus is impossible, the connection validating request and the connection invalidating request being outputted from the other communication apparatus; an apparatus address obtaining unit operable to obtain an apparatus address with a first message via the network when a change from the connection invalidating request to the connection validating request is detected; an address holding unit which holds the apparatus address, said address holding unit including a non-transitory computer-readable recording medium for storing the apparatus address; and a message transmission continuing unit operable to cause the communication apparatus to perform an operation or a status check for the apparatus address held in said address holding unit when receiving a second message transmitted to the apparatus address held in said address holding unit via the network regardless of whether or not said one-way data connection status detecting unit detects the connection invalidating request, the second message instructing the communication apparatus to perform the operation or the status check.