Design of the Extremal Sampler System by Using a Thread(<Special Issue>INNOVATIVE BIOMEDICAL TECHNOLOGIES and INFORMATICS, BMFSA2008)

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A coding system by measuring the maximum and minimum of the filtered waveform has been developed by using a thread on a single processor system of the PC/AT compatible computer. The performance of the system has been modeled on the human short-term sensory memory, which preserves the acoustic trace for 200-300 ms, and thus the length of a ring buffer for the temporal store was determined. Because we were convinced that the latency of the file access had a critical influence on the deviation of the processing time under a multitask operating system, the frequency of saving the extremal data was limited to every sixteen blocks out of a ring buffer, which comprised a total of thirty-two blocks or 32 by 16,384 bytes for temporal use. Use of a thread has been promoted to realize processing of the 6-channel filter-bank and the extremal sampling at a bandwidth of 80-5, 120 Hz in accordance with the previous study, recording sound at a rate of 44.1 kHz. We have completed the multipurpose transcription system for the analysis of the acoustic structure, making the first step toward the construction of artificial intelligence.
バイオメディカル・ファジィ・システム学会の論文