Abstract: A method of modification of audio data to improve the quality of the audio modification or reconstruction or improves the speed of such reconstruction or modification and produces more realistic audio data. Realistic audio data is audio data that is generated in natural events like talking or singing or a vehicle passing by and is not generated only by artificially constructing audio data like in a synthesizer. This will lead to audio data that will be perceived more likely as natural or unmodified audio signal when being played back to human beings. The method involves modification of some part of transformed audio data, especially phase data.

Abstract: A method for authorizing a program sequence provides, despite centralization and the associated high latency and optionally faulty communication, an undisturbed program sequence accompanied by protection of base functionalities. Data of the program sequence may be maintained in various provided states, and at least one instruction of the program sequence which accesses the data is maintained in different, functionally equivalent implementations. The set of the state indices of the provided states and the multiset form a directed acyclic (multi)graph, wherein the provided states form the nodes, and the implementations of the instruction form the edges and/or multiple edges, of the graph.