Title:
SPECIAL SIGNALING FOR PERCEPTUAL QoS MEASUREMENT
Document Type and Number:
WIPO Patent Application WO2002037694
Kind Code:
A3
Abstract:
This invention provides a system and method for measuring the perceptual quality of service (PQoS) of a signal transmitted in a communications network. A predetermined reference signal is embedded into a signal transmitted from a communications device in the communications network, e.g., by multiplexing. The composite signal travels through the telecommunications network and is transmitted to another communications device in the communications network. The composite signal is intercepted prior to being received by the other communications device. The transmitted signal and the embedded signal are separated. The transmitted signal is transmitted to the other communications device. The separated embedded signal is forwarded to a PQoS measurement unit which compares the separated embedded signal and the predetermined reference signal to determine the PQoS of the transmitted signal.
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Inventors:
ESMAILZADEH RIAZ (JP)
IHARA MITSUMASA (JP)
IHARA MITSUMASA (JP)
Application Number:
PCT/JP2001/009484
Publication Date:
October 03, 2002
Filing Date:
October 29, 2001
Export Citation:
Assignee:
GENISTA CORP (JP)
ESMAILZADEH RIAZ (JP)
IHARA MITSUMASA (JP)
ESMAILZADEH RIAZ (JP)
IHARA MITSUMASA (JP)
International Classes:
H04B17/00; H04L12/24; H04L12/26; H04M3/22; H04M7/00; (IPC1-7): H04B17/00; H04M3/22; G10L15/02; H04B1/707
Domestic Patent References:
| WO2000022803A1 | 2000-04-20 |
Foreign References:
| US5978783A | 1999-11-02 | |||
| EP0647375A1 | 1995-04-12 | |||
| US5799005A | 1998-08-25 |
Other References:
RIX A W ET AL: "The perceptual analysis measurement system for robust end-to-end speech quality assessment", 2000 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING. PROCEEDINGS. (ICASSP). ISTANBUL, TURKEY, JUNE 5-9, 2000, IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING (ICASSP), NEW YORK, NY: IEEE, US, vol. 3 OF 6, 5 June 2000 (2000-06-05), pages 1515 - 1518, XP002175797, ISBN: 0-7803-6294-2
SHIHUA WANG ET AL: "AN OBJECTIVE MEASURE FOR PREDICTING SUBJECTIVE QUALITY OF SPEECH CODERS", IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, IEEE INC. NEW YORK, US, vol. 10, no. 5, 1 June 1992 (1992-06-01), pages 819 - 829, XP000274717, ISSN: 0733-8716
SHIHUA WANG ET AL: "AN OBJECTIVE MEASURE FOR PREDICTING SUBJECTIVE QUALITY OF SPEECH CODERS", IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, IEEE INC. NEW YORK, US, vol. 10, no. 5, 1 June 1992 (1992-06-01), pages 819 - 829, XP000274717, ISSN: 0733-8716
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