Patent ID: 8274675

Claim:
A print apparatus which is arranged to communicate directly with a digital camera via a communication unit using a Picture Transfer Protocol (PTP) protocol in a transport layer and to serve as a host device during communication with the digital camera, the digital camera being used as a user interface device for instructing printing, for printing a sensed image stored in a memory attached to the digital camera, and to serve as a slave device during communicating with the print apparatus, the print apparatus comprising: a request unit configured to request the digital camera to send authentication information stored in the digital camera in response to the start of communication with the digital camera by said communication unit, said authentication information being managed by the digital camera as an object to be communicated in the PTP protocol and indicating that the digital camera can communicate using a predetermined direct printing protocol used in an application layer; and a notification unit configured to notify the digital camera of authentication information being managed by the print apparatus as an object to be communicated in the PTP protocol and indicating that the print apparatus can communicate using the predetermined direct printing protocol used in the application layer, after receiving from the digital camera the authentication information indicating that the digital camera can communicate using the predetermined direct printing protocol used in the application layer; wherein, after said notification unit notifies the digital camera the authentication information, the print apparatus receives a print job from the digital camera using the predetermined direct printing protocol.