Abstract: The present invention relates to a method of issuing credit to a subscriber by a managing device in an on-demand video system. The method includes receiving a request for credit information on a subscriber from a receiver, determining exchangeable credit based on the remaining purchase information on the subscriber in response to the request for credit information, transmitting information on the determined credit to the receiver, receiving an exchange request including selective information on at least some pieces of the determined credit for the receiver, and issuing credit corresponding to the selective information, to the subscriber.

Abstract: The present invention relates to a device and a method for performing a linking activity between applications for which execution is requested before executing the application, when an application execution request is made on an Android platform, thereby enabling an Android terminal provider to provide an environment for a user to execute the Android application while simultaneously allowing the user to separately perform an activity which is linked to each of the applications before executing the applications.

Abstract: The present invention offers a method for channel change in digital broadcasting consisting of: a step 1 for recognizing a command for a channel change while the currently connected channel is being decoded at the digital broadcasting terminal; a step 2 for completing reception of the current stream while maintaining the received picture if there is a command for a channel change according to said step 1; a step 3 for receiving and analyzing the information of the newly concatenated stream without re-initializing the decoder and concatenating two streams; and a step 4 for renewing information of the newly concatenated stream in order to maintain continuity between the previous stream and the newly concatenated stream using the information obtained in said steps 2 and 3. Therefore, time delay during channel change will be minimized by changing channels without decoder re-initialization and without break in the channel changing time.