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Predecessor
Volume 45, Issue 9
Displaying 1-12 of 12 articles from this issue
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Yuji Kiuchi1991 Volume 45 Issue 9 Pages 1043-1048
Published: September 20, 1991
Released on J-STAGE: March 14, 2011
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Yasuo Takemura1991 Volume 45 Issue 9 Pages 1049-1053
Published: September 20, 1991
Released on J-STAGE: March 14, 2011
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Masayoshi Ozaki, Masaru Yoshino, Mitsuo Takashima1991 Volume 45 Issue 9 Pages 1054-1059
Published: September 20, 1991
Released on J-STAGE: August 17, 2011
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Hiroyasu Ohtsubo1991 Volume 45 Issue 9 Pages 1060-1066
Published: September 20, 1991
Released on J-STAGE: March 14, 2011
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Yoshihiro Fujita1991 Volume 45 Issue 9 Pages 1067-1072
Published: September 20, 1991
Released on J-STAGE: March 14, 2011
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Hiroo Wakabayashi, Mitsuo Iwama1991 Volume 45 Issue 9 Pages 1073-1079
Published: September 20, 1991
Released on J-STAGE: March 14, 2011
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Masaaki Nakayama, Kazutaka Ashida1991 Volume 45 Issue 9 Pages 1080-1088
Published: September 20, 1991
Released on J-STAGE: March 14, 2011
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Application of Coding Theory to Computer TechnologyMinoru Saito1991 Volume 45 Issue 9 Pages 1089-1094
Published: September 20, 1991
Released on J-STAGE: March 14, 2011
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[in Japanese]1991 Volume 45 Issue 9 Pages 1095-1098
Published: September 20, 1991
Released on J-STAGE: March 14, 2011
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Takao Arai, Toshifumi Takeuchi, Takaharu Noguchi, Nobutaka Amada, Kuni ...1991 Volume 45 Issue 9 Pages 1099-1108
Published: September 20, 1991
Released on J-STAGE: August 17, 2011
JOURNAL FREE ACCESSThis paper describes a depth recording technique for commercial VTR in which the digital audio signal and the video signal are recorded on the depth-multiplexed layer of a magnetic tape. Digital audio signals with a data rate of 2.6Mbps were recorded with video signals. To avoid crosstalk, a digital modulation method has been studied which gives less low-frequency components. The 0-QDPSK method was most suitable to magnetic recording. A data error rate of less than 10-4 was obtained and interference was eliminated.View full abstractDownload PDF (1380K) -
Senshi Nasu, Kyouya Kamata, Minoru Kohata, Tasuku Takagi1991 Volume 45 Issue 9 Pages 1109-1116
Published: September 20, 1991
Released on J-STAGE: March 14, 2011
JOURNAL FREE ACCESSIn an optical Fourier transforming system, the phase correlation of transmitted light from periodical slits as an input pattern is considered, and a method of optical addition and subtraction is proposed. Applying this method to distance calculation between input and standard vectors in vector quantization that is effective in bandwidth compression of speech signals is considered. Fundamental experiments on optical subtration are done, and a possibility of calculation is shown.View full abstractDownload PDF (1037K) -
Shin-ich Arazaki, Masahito Saigusa, Sumihisa Hashiguchi, Makoto Ohki1991 Volume 45 Issue 9 Pages 1117-1122
Published: September 20, 1991
Released on J-STAGE: March 14, 2011
JOURNAL FREE ACCESSA method to prescribe bit-rate for adaptive run-length DCT coding is described. To make the coded bit-rate within the prescribed quantity, the quantization step width of DCT coefficient is determined from the total bit-rate estimated from prescanned data of selected pixels. The bit-rate estimate is quickly obtained by simple addition and subtraction. The variation of the quantization step width over an image to be coded was kept small to make the image quality uniform The final bit-rate lies within 0--4.0% of the prescribed value.View full abstractDownload PDF (813K)
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