Data processing: measuring – calibrating – or testing – Testing system – Signal generation or waveform shaping
Reexamination Certificate
2006-05-23
2006-05-23
Hoff, Marc S. (Department: 2857)
Data processing: measuring, calibrating, or testing
Testing system
Signal generation or waveform shaping
C702S189000, C704S220000
Reexamination Certificate
active
07050924
ABSTRACT:
The perceptibility of degradations caused to signals transmitted over a transmission medium is measured by generating one or more predetermined transmission degradation conditions (et) and subjecting a test signal (St) to the transmission degradation conditions (et) in a network simulation device. The degree M(e) to which the or each transmission degradation condition (et) is perceptible to the human perceptual system is measured and a data set is generated and stored for converting one or more transmission degradation conditions (et) to respective values of perceptibility M(e). The data set may be a look-up table or an empirically determined formula. The data set may then be used on live traffic (S′), by identifying objectively measured transmission degradation conditions (e) in the received signal (S′) and retrieving from the data set in the data storage means (7) a value of perceptibility (M) associated with the transmission degradation conditions (e) so identified. In this way a measure of the subjective significance of degradation in the signal (S′) can be derived from objective measures of degradation.
REFERENCES:
patent: 5621854 (1997-04-01), Hollier
patent: 5799272 (1998-08-01), Zhu
patent: 5848384 (1998-12-01), Hollier et al.
patent: 5890104 (1999-03-01), Hollier
patent: 5940792 (1999-08-01), Hollier
patent: 5999900 (1999-12-01), Hollier
patent: 6035270 (2000-03-01), Hollier et al.
patent: 6219634 (2001-04-01), Levine
patent: 6240385 (2001-05-01), Foodeei
patent: 6246345 (2001-06-01), Davidson et al.
patent: 6363338 (2002-03-01), Ubale et al.
patent: 6377917 (2002-04-01), Gimenez de los Galanes et al.
patent: 6421350 (2002-07-01), Szurkowski et al.
patent: 6633841 (2003-10-01), Thyssen et al.
patent: 6647366 (2003-11-01), Wang et al.
patent: 2003/0092394 (2003-05-01), Gray et al.
patent: 4324292 (1995-02-01), None
patent: 647375 (1995-04-01), None
patent: 705501 (1996-04-01), None
patent: WO96/06495 (1996-02-01), None
patent: WO9606496 (1996-02-01), None
patent: WO97/05730 (1997-02-01), None
patent: WO01/93470 (2001-12-01), None
Rix et al., “The perceptual analysis measurement system for robust end-to-end speech quality assessment”, Jun. 2000, Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on, vol. 3, 1515-1518.
Gray Philip
Hollier Michael P
Reynolds Richard J B
Rix Antony W
Baran Mary Catherine
British Telecommunications public limited company
Hoff Marc S.
Nixon & Vanderhye P.C.
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