Zobrazeno 1 - 10
of 56
pro vyhledávání: '"J.J.D. van Schalkwyk"'
Autor:
J.J.D. van Schalkwyk, H.C. Kotze
Publikováno v:
IEEE South African Symposium on Communications and Signal Processing.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c26129b9fa2ffd933cc3ed991d8d938d
https://doi.org/10.1109/comsig.1990.658547
https://doi.org/10.1109/comsig.1990.658547
Autor:
J.J.D. Van Schalkwyk, M.A.H. Venter
Publikováno v:
IEEE South African Symposium on Communications and Signal Processing.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a410f86c2b2c6a042e33becc70c24818
https://doi.org/10.1109/comsig.1990.658539
https://doi.org/10.1109/comsig.1990.658539
Autor:
T. Weyers, J.J.D. Van Schalkwyk
Publikováno v:
IEEE South African Symposium on Communications and Signal Processing.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84414e65c42c31a7dc8c384a7603c3d8
https://doi.org/10.1109/comsig.1990.658538
https://doi.org/10.1109/comsig.1990.658538
Publikováno v:
IEEE South African Symposium on Communications and Signal Processing.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7b1b92fa3ab678285c590a5aba0b654
https://doi.org/10.1109/comsig.1990.658540
https://doi.org/10.1109/comsig.1990.658540
Autor:
J.J.D. van Schalkwyk, M.A.H. Venter
Publikováno v:
COMSIG 1989 Proceedings: Southern African Conference on Communications and Signal Processing.
A method for integrating stereo imaging principles into video coding is described along with the progress of the research up to now. Specifically, the basic structure of an m*384 kbit/s (m=1.5) video codec as recommended by the CCITT is described. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46cb219511d9f744dc0ee6902c47b49c
https://doi.org/10.1109/comsig.1989.129028
https://doi.org/10.1109/comsig.1989.129028
Autor:
J.J.D. van Schalkwyk, T. Weyers
Publikováno v:
COMSIG 1989 Proceedings: Southern African Conference on Communications and Signal Processing.
The application of suboptimal runlength codes to two-tone ID photos is discussed. Standard and vertical predictive run-length-coding techniques are examined. Huffman coding of the results is reviewed. Computation of thresholds, edge detection, and pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a796f83e77c15bd4c175d3f592a2cfa
https://doi.org/10.1109/comsig.1989.129026
https://doi.org/10.1109/comsig.1989.129026
Publikováno v:
COMSIG 1989 Proceedings: Southern African Conference on Communications and Signal Processing.
An alternative to linear predictive coding (LPC) that makes use of multipulse techniques in the frequency domain is described. The synthesized speech promises to have a much more natural sounding quality than that of ordinary LPC at 2400 b/s. By maki
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::531782ed964b7284d52ba9b67ac3a325
https://doi.org/10.1109/comsig.1989.129032
https://doi.org/10.1109/comsig.1989.129032
Publikováno v:
COMSIG 88@m_Southern African Conference on Communications and Signal Processing. Proceedings.
The problems associated with using multipulse excitations for low-bit-rate linear predictive coding (LPC) of speech are described, and a suggestion is made towards the realization of a 2.4 kb/s multipulse system. One of the reasons for the degradatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cc90862251841373fbd4ed87f55a6ba
https://doi.org/10.1109/comsig.1988.49295
https://doi.org/10.1109/comsig.1988.49295
Autor:
D.J. Joubert, J.J.D. van Schalkwyk
Publikováno v:
COMSIG 88@m_Southern African Conference on Communications and Signal Processing. Proceedings.
The final results obtained from a TMS 32010-based 2400 b/s linear-predictive coding (LPC) vocoder system are described. The design used as well as practical considerations and problems associated with the preprocessing and pitch prediction are discus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d01eba95e2ec3077523f6299b2184207
https://doi.org/10.1109/comsig.1988.49297
https://doi.org/10.1109/comsig.1988.49297
Autor:
J.J.D. van Schalkwyk, A.C. Smith
Publikováno v:
COMSIG 88@m_Southern African Conference on Communications and Signal Processing. Proceedings.
Line-spectrum pairs (LSPs) are presented as an alternative coding method for the vocal tract parameters of a linear predictive vocoder. These parameters provide improved control over the perceptual effect of quantization and coding. Two methods for d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eafb20d18c85746624e6fc68df27c0dd
https://doi.org/10.1109/comsig.1988.49292
https://doi.org/10.1109/comsig.1988.49292