Identifier

A method of encoding identifiers by providing audio identifiers therefrom on a computer device, the method being implemented by hardware of the computer device including at least a processor and a memory, the method comprising:

• providing a set of audio signals as respective bitstreams, wherein each audio signal of the set of audio signals is defined based on audio signal information including at least one of a type, a fundamental frequency, a time signature and a time, wherein each audio signal comprises a set of audio segments, wherein each audio segment of the set of audio segments is defined based on audio segment information including at least one of a frequency, an amplitude, a transform, a duration and an envelope;
• receiving an identifier and selecting a subset of audio signals from the set of audio signals according to the received identifier based, at least in part, on the audio signal information and/or the audio segment information;
• processing the selected subset of audio signals by combining the selected subset of audio signals to provide an unique audio identifier wherein elements, features and/or information of the received identifier are encoded by corresponding and/or respective elements, features and/or information of the unique audio identifier and wherein the unique audio identifier is time-varying and includes redundancy and/or error correction;
• and
• outputting the unique audio identifier in an output audio signal as an output bitstream, wherein the unique audio identifier encodes the received identifier.