Information Technologies and Computer Engineering

The transition from analogue input information, in particular, in the form of a visual picture, to its digital representation for further processing is impossible without the use of analogue-to-digital conversion. Currently, there are many effective conversion methods and tools available. At the same time, alternative methods of analogue-to-digital conversion are being used. Among them are methods based on the principle of the ‘golden section’ with the formation of digital data in the form of Fibonacci codes, as well as the method of conversion in the logical-time basis with the formation of digital data in the form of single codes. The peculiarity of analogue-to-digital conversion in the logic-time base is the use of the time-pulse conversion method. This method of conversion is based on quantisation by a unit duration τ of the input time duration of the optical signal. In this paper, we consider the features of analogue-to-digital conversion in the logic-time basis, as well as the properties of unit codes, in the form of which the resulting digital signals are formed. Two types of unit codes, normal and positional, and their noise immunity are analysed. This property of unit codes allows them to be used for data transmission, encoding states in control devices, and addressing content in storage devices.

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