Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Masuo Umemoto"'
Autor:
Masuo Umemoto
Publikováno v:
IEEE Transactions on Magnetics. 34:80-84
High-data-rate signal processing for hard disk drives is discussed. A recording channel is equalized as a partial response (PR) (1+D)(1-D/sup 3/), where D is a delay operator. Furthermore, 1/(1+D) pre-coding scheme is used, and the resulting response
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f27c4e32fbefd26743fde9eb727cc35f
https://doi.org/10.1109/20.663453
https://doi.org/10.1109/20.663453
Publikováno v:
Electronics and Communications in Japan (Part II: Electronics). 78:103-113
Short wavelength recording requires a channel code that has a larger minimum magnetic-transition interval (Tmin) than the data-bit interval (Tb). An 8-12 conversion channel code has been developed in which Tmin is 1.33 times longer than Tb. In this c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::541a5d267984d1c3ca4da45988342840
https://doi.org/10.1002/ecjb.4420780711
https://doi.org/10.1002/ecjb.4420780711
Autor:
Masuo Umemoto
Publikováno v:
IEEE Transactions on Magnetics. 31:1044-1049
This paper presents a strategy for reducing nonlinearities at high-recording densities; new additional encoding scheme for DC-free d=1 channel codes, and, a partial response (1+D) system with 2-bit decoding. This encoding scheme, which to DC-free cod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfc2f97cd0449405a767ded84b74814a
https://doi.org/10.1109/20.364782
https://doi.org/10.1109/20.364782
Autor:
Masuo Umemoto
Publikováno v:
The Journal of the Institute of Television Engineers of Japan. 47:814-818
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::070667304c316551cf7c30cf9ad29c8f
https://doi.org/10.3169/itej1978.47.814
https://doi.org/10.3169/itej1978.47.814
Publikováno v:
Signal Processing: Image Communication. 2:343-348
Some of the essential features of the record/playback system of a new 1.2 Gbit/s digital VTR are described. The VTR can record the full bandwidth of 1125/60 HDTV signals, namely 30 MHz luminance, and 15 MHz for each of the two color difference signal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3e1f2b3702930563e33e128add64c09
https://doi.org/10.1016/0923-5965(90)90010-f
https://doi.org/10.1016/0923-5965(90)90010-f
Autor:
Masuo Umemoto
Publikováno v:
IEEE Transactions on Magnetics. 34:1937-1939
Decision feedback equalization, which uses extraordinary level detection (Ex-DFE), with two feedback loops in parallel, is a detection technique which achieves not only significant error rate improvements but also detecting performance of burst-error
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a47ca119dd97eb2b40f376fbabefd224
https://doi.org/10.1109/20.706749
https://doi.org/10.1109/20.706749
Autor:
Masuo Umemoto
Publikováno v:
Networking — ICN 2001 ISBN: 9783540423027
ICN (1)
ICN (1)
A future ITS info-communication systems using DSRC is discussed. As the first step of an inter-media multimode terminal in the future, an intramedia multimode wireless communication terminal using software defined modem technology is developed in ord
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8263dea07811765ca066dcb5a3e9d16
https://doi.org/10.1007/3-540-47728-4_72
https://doi.org/10.1007/3-540-47728-4_72
Autor:
Masuo Umemoto
Publikováno v:
Journal of the Magnetics Society of Japan. 21:S2_395-398
The partial response class 5 (PR5) signal processing for perpendicular magnetic recording with single layer media is discussed. Several benefits of the PR5 system to channel coding and Viterbi detection are shown: applicable to both the d=0 code and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57f0bdcf1cf804ba2f43c49e9f381170
https://doi.org/10.3379/jmsjmag.21.s2_395
https://doi.org/10.3379/jmsjmag.21.s2_395
Autor:
Masuo Umemoto, Hirotake Ishi
Publikováno v:
Journal of the Magnetics Society of Japan. 17:S2_155-159
An experimental high-speed magnetic recording channel at a 198Mb/s data rate for high definition digital VCRs was developed. An 8-12 convesion channel code with a density ratio of 1.33 was used. Optimum parameters of integration detection for the rec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::336af7847cda0dccab4e9a5a46bce3a9
https://doi.org/10.3379/jmsjmag.17.s2_155
https://doi.org/10.3379/jmsjmag.17.s2_155
Publikováno v:
IEEE Transactions on Broadcasting. :210-213
One of the most sought-after improvements in HDTV equipment is better VTR picture quality. A promising way to achieve this is through digital recording, which is free from picture quality degradation in the recording and playback processes.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b995af8110bff3c2b2702b8f137c3cad
https://doi.org/10.1109/tbc.1987.266655
https://doi.org/10.1109/tbc.1987.266655