Zobrazeno 1 - 10
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pro vyhledávání: '"J.L.H. Webb"'
Autor:
J.L.H. Webb
Publikováno v:
IEEE Transactions on Circuits and Systems for Video Technology. 11:981-985
A new method for reversible variable-length codes (RVLC) decoding is described, which decreases the amount of table space required, particularly for MPEG-4 video RVLC decoding on a DSP chip. Because of the special structure of RVLC codewords, the dec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49f89bb5f0bca8498063ad303138f846
https://doi.org/10.1109/76.937449
https://doi.org/10.1109/76.937449
Autor:
J.L.H. Webb
Publikováno v:
IEEE Transactions on Signal Processing. 48:2594-2600
A new time-domain derivation is presented for interpolation and decimation by a fractional factor U/D. Though it is well known that such a filter can be implemented using a direct-form I, FIR filter with time-varying coefficients, a novel time-varyin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f25bac00bf5e9576727fec06b01b5daa
https://doi.org/10.1109/78.863063
https://doi.org/10.1109/78.863063
Publikováno v:
ICIP (1)
We consider the application of a spotlight-mode synthetic aperture radar (SAR) imaging technique to the problem of high-resolution lunar imaging and other related radar astronomy problems. This approach offers improved image quality, compared with co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50b7f8cda20de4cfd4e7d1dd25cb9d6a
https://doi.org/10.1109/83.725364
https://doi.org/10.1109/83.725364
Autor:
David C. Munson, J.L.H. Webb
Publikováno v:
IEEE Transactions on Signal Processing. 44:1923-1931
More efficient use of multipliers in FIR filters can be achieved at the expense of a slight increase in delay by designing sparse filter structures. We have developed a new, relatively simple approach to designing sparse cascaded filters, also descri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd100274611c143186722940204eeeb0
https://doi.org/10.1109/78.533713
https://doi.org/10.1109/78.533713
Autor:
K.L. Oehler, J.L.H. Webb
Publikováno v:
ICIP (1)
We consider two MSE-based strategies for selecting the best quantization parameter (Q) for each coded macroblock in H.263 video coding. In the first study, Q was adjusted to match a target mean-squared error (MSE) for each block. The goal was to avoi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c24feebec096f2d363e7d694e58d6535
https://doi.org/10.1109/icip.1997.647782
https://doi.org/10.1109/icip.1997.647782
Autor:
J.L.H. Webb, K. Oehler
Publikováno v:
ICIP (2)
This paper describes a simple rate-distortion model, shows how the model parameters can be estimated using Kalman filtering, and suggests how this information may be used for rate control in real-time systems. Real-time parameter estimation is more r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ba649389c80a4a1840a6d3715ed222b
https://doi.org/10.1109/icip.1997.638661
https://doi.org/10.1109/icip.1997.638661
Autor:
J.L.H. Webb, David C. Munson
Publikováno v:
ICASSP
Considers the problem of spotlight-mode synthetic aperture radar (SAR) imaging for an arbitrary radar path. A general imaging scenario involves a 3-D scattering surface with data collected along an arbitrary 3-D radar path. This approach is useful, f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1079cc003dcb85bae7cd593628c70ec8
https://doi.org/10.1109/icassp.1995.479947
https://doi.org/10.1109/icassp.1995.479947
Autor:
J.L.H. Webb, David C. Munson
Publikováno v:
ICIP
We consider the problem of radar imaging of 3-D targets, where conventional 2-D synthetic aperture radar (SAR) techniques are inadequate, because of range-Doppler ambiguities. This problem is cast into the form of a spectral estimation problem, which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ccfbaac89cfa987aa44b6176ea03219
https://doi.org/10.1109/icip.1995.529058
https://doi.org/10.1109/icip.1995.529058
Autor:
D.C. Munson, J.L.H. Webb
Publikováno v:
IEEE Signal Processing Letters. 2:68-69
We consider a simple modification to classical block truncation coding (BTC) that may permit the use of larger block sizes for some applications. although BTC is favored for its simple encoding and decoding, its disadvantage is the relatively low com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::208b2e38b45090f16071eaee63f9ff09
https://doi.org/10.1109/97.376909
https://doi.org/10.1109/97.376909
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