CPC Class H04N

A system is provided for downloading, for distribution and for acoustic reproduction of a music album, which includes at least one or several digital music files and/or multimedia content in the form of one or several multimedia files assignable to the music file, wherein the music file and/or multimedia file are provideable as data sets for downloading, wherein the music file and/or multimedia file are as data sets pre-holdable grouped after downloading as a music album in a data memory of an end-user-device, wherein the music file and/or multimedia file is treatable by a treatment means, particularly in dependency to an authorization, and wherein the treated music file and/or multimedia file is transferable to an output device of the end-user-device, especially a speaker device with or without a display device, in such a way, that the music file and/or multimedia file is at least acoustically emittable to one user.

Methods and computer systems are used to authorize a transaction. In one aspect, the method includes, at a computer system with one or more processors and memory, receiving a message requesting a transaction of a first media content for display on the public display; detecting one or more devices in proximity to the first device; selecting a second device from the detected one or more devices based on a match of a first user account between the second device and the first device; sending a request for authorizing the transaction to the selected second device; receiving a response to the request for authorizing the transaction from the selected second device; and completing the transaction on the first device using transaction information of the first user account and stored at the first device.