Patent ID: 8336066

Claim:
A communication apparatus that notifies an event receiving apparatus of an occurrence of an event, the event receiving apparatus being connected to said communication apparatus via a network, said communication apparatus comprising: an event message generating unit configured to generate an event message indicating the occurrence of the event, the event message including a plurality of media information, each of the plurality of media information indicating a media type of the media on which event information is transmitted, wherein (i) the media information obtainable by the event receiving apparatus, (ii) the event information is associated with the event, and (iii) the media type indicated by each of the plurality of media information identifies a different format of the media on which the event information is transmitted; and a communication unit configured to transmit the event message to the event receiving apparatus via the network, wherein the media type indicates one of a video format, a still image format, and an audio format, and wherein each of the plurality of media information indicates, in addition to the media type of the media on which the event information is transmitted, a compression method of the media on which the event information is transmitted, a transmission method of the media on which the event information is transmitted, and a pixel size when the media type indicated by the media information is one of the video format and the still image format.