Data processing device and method

A data processing device, comprising:

• a detection circuit configured for detecting photoplethysmographic data, the detection circuit comprising:
• a light-emitting diode used for illuminating wrist skin of a user;
• a photoreceptor used for detecting light intensity reflected by the wrist skin of the user;
• and
• a microprocessor used for calculating the photoplethysmographic data from the light intensity;
• a memory configured for storing a plurality of computer-executable instructions;
• and
• a processor coupled to the detection circuit and the memory, wherein the processor is configured for executing the plurality of computer-executable instructions to run a transformer model, and configured for performing following operations:
• performing a short-term Fourier transform on the photoplethysmographic data to generate a first spectrogram matrix, wherein a plurality of columns in the first spectrogram matrix respectively correspond to a plurality of time segments, and each of the plurality of columns in the first spectrogram matrix comprises a plurality of frequency components on a corresponding time segment;
• performing numerical split processing on the first spectrogram matrix to generate a first spectrum matrix, wherein the first spectrum matrix comprises a plurality of first spectrum arrays arranged in sequence from left to right;
• inputting the plurality of first spectrum arrays into the transformer model from left to right to generate a plurality of second spectrum arrays in sequence, and transforming the plurality of second spectrum arrays into a second spectrum matrix according to an order in which the plurality of second spectrum arrays are generated, wherein the second spectrum arrays are columns in the second spectrum matrix from left to right;
• performing numerical combining processing on the second spectrum matrix to generate a second spectrogram matrix;
• and
• performing inverse short-term Fourier transform on the second spectrogram matrix to generate arterial blood pressure data.