Zobrazeno 1 - 10
of 59
pro vyhledávání: '"J.W.R. Griffiths"'
Autor:
David Shrimpton, A.G. Tagg, L.T. Chia, P.J. Coventry, Iain Phillips, J.W.R. Griffiths, David J. Parish
Publikováno v:
Scopus-Elsevier
A configurable architecture for a low-cost videoconferencing terminal usable on an ATM network has been developed which provides a high degree of performance in a modular manner. Considerable research has been conducted in order to provide support fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c247988473b2879afd97617e405ac435
https://doi.org/10.1049/ecej:19970308
https://doi.org/10.1049/ecej:19970308
Publikováno v:
Computers & Graphics. 18:11-19
Transmission of video information over computer networks poses many problems that must be solved. In most cases an absolute guarantee that video cells will not be lost under any circumstances cannot be given, and the video service must accept this po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33fff6fd44d42bc358132ebfbf98f62d
https://doi.org/10.1016/0097-8493(94)90112-0
https://doi.org/10.1016/0097-8493(94)90112-0
Publikováno v:
Proceedings of OCEANS'94.
Discusses the application of the phase mode techniques to the processing of signals in a circular sonar array and in particular in the application of high resolution algorithms such as MUSIC and ESPRIT. Simulation and experimental results are present
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20f9afb4acd14e9824d664cbfc183959
https://doi.org/10.1109/oceans.1994.363890
https://doi.org/10.1109/oceans.1994.363890
Publikováno v:
Scopus-Elsevier
The paper describes videoconferencing workstation using ATM for the transmission of all data and Motion-JPEG for compression of the video. Of particular interest is the work on algorithms to help conceal the errors that arise from transmission over a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef7ab7535f99e386abcd6001454fe56e
https://doi.org/10.1109/tencon.1994.369193
https://doi.org/10.1109/tencon.1994.369193
Publikováno v:
6th International Conference on Electronic Engineering in Oceanography.
Briefly reviews the properties of modally-excited circular and cylindrical arrays and their application to sonar systems. The authors present the basis of two new techniques, namely: (i) sectoral phase modes, which are directional patterns with the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d14e69bc3f3a9daafdbb3f5e6df68084
https://doi.org/10.1049/cp:19940577
https://doi.org/10.1049/cp:19940577
Autor:
J.W.R. Griffiths
Publikováno v:
Journal of Sound and Vibration. 1:127-140
Although it would appear obvious that an axial compressor would generate pure tones at frequencies related to the engine speed, a close examination of observed spectra in the region of the peaks shows that the “tones” are not pure but have charac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbc774b787632684cbc028d726645332
https://doi.org/10.1016/0022-460x(64)90074-4
https://doi.org/10.1016/0022-460x(64)90074-4
Autor:
J.W.R. Griffiths
Publikováno v:
Journal of the British Institution of Radio Engineers. 17:330-338
The problem of trace-to-trace correlation is reviewed in the light of some physiological experiments on the relationship between the area of an illuminated patch and the contrast required for its detection. It is concluded that the improvement in det
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::082299482a59d0e5592c70f1d6931141
https://doi.org/10.1049/jbire.1957.0032
https://doi.org/10.1049/jbire.1957.0032
Autor:
J.W.R. Griffiths, D.C. Cooper
Publikováno v:
Journal of the British Institution of Radio Engineers. 21:421-433
The performance of some basic integration systems is analysed, and the effect of beam pattern on their performance is considered. A new system is described employing two delay loops which, in general, will give a small improvement in threshold detect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::525b83976d207d26fcd2038a8dcca2e3
https://doi.org/10.1049/jbire.1961.0055
https://doi.org/10.1049/jbire.1961.0055
Autor:
J.W.R. Griffiths, M.J-M. Clément
Publikováno v:
Non-Destructive Testing. 6:195-199
In order to develop a sensitive but fast acoustic holographic system a translated-circular scanner has been constructed. The properties of the two-dimensional Fourier transform of the translated-circular sampling function show that this system can to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec41e2447b0f11582c1a4d2614d018b0
https://doi.org/10.1016/0029-1021(73)90032-7
https://doi.org/10.1016/0029-1021(73)90032-7
Autor:
J.W.R. Griffiths
Publikováno v:
Journal of the British Institution of Radio Engineers. 19:183-186
In order to determine the relation between the output and input signal/noise ratios of a p.c.m. system, it is necessary to determine the probability of error in selecting a single pulse in a background of noise. This reduces to a problem in statistic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35c4baf9f0fba68835e8e67670a86f24
https://doi.org/10.1049/jbire.1959.0022
https://doi.org/10.1049/jbire.1959.0022