Hidetoshi Matsumura

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In this paper, we propose an ADPCM coder which uses a backward adaptive predictor based on the adap tive mel-cepstral analysis. The spectrum represented by the mel-cepstral coefficients has frequency resolution similar to that of the human ear which has high resolution at low frequencies. In the coder, since the transfer functions of noise shaping and(More)
  • H Matsumura
  • 2001
A major influx of new people, today termed Yayoi, migrated from the East Asian continent into the Japanese archipelago during the Aeneolithic and Protohistoric periods and interbred with the preexisting Jomon people. This study classifies ancient and more modern Japanese into natives or immigrants using discriminant analysis based on dental measurements in(More)
The early Hoabinian, the Neolithic Da But and the Dong Son (early Metal age) civilized peoples in northern Vietnam were investigated based on dental morphology and were compared with specimens from surrounding Northeast and Southeast Asia including Australians and Melanesians. In both the metric and nonmetric tooth traits, the Hoabinian and Da But specimens(More)
Lipase-catalyzed kinetic resolution of the N,N-dialkyl-3-benzyloxymethyl-4-hydroxybutanamide 10a,b afforded the acetate 11a,b with (R) configuration, whereas the N-monoalkyl-3-benzyloxymethyl-4-hydroxybutanamide 10c-e gave the acetate 11c-e with (S) configuration. The butanamide 10 smoothly cyclized to give chiral 4-benzyloxymethyldihydrofuran-2-one 9(More)
In this paper, we introduce an FPGA-accelerated partial image retrieval engine, suitable for a visualized document search system. To achieve efficient sharing and reuse of digitized documents, this system has the function of partial duplicate image retrieval. To meet the demand for stability and speed, we introduced a brute-force matching of the BRIEF(More)
A nearly complete human skeleton dating to the Early Holocene (epi-Paleolithic culture) excavated from Gua Gunung Runtuh, Malaysia, is described. Cranial, dental, and limb bone measurements are recorded on the skeleton, and compared with early and modern skeletal samples from Southeast Asia and Australia. The comparisons demonstrate that the Gua Gunung(More)
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