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ITU-T P.501 (2000) Amd. 1 (05/2004)

Nouvelles Annexes A et B

L'Annexe A propose d'utiliser deux signaux de test (une séquence de pseudo-bruit avec un faible facteur de crête et une onde multisinusoïdale à distribution logarithmique) pour la mesure de l'affaiblissement de couplage du terminal (TCL, terminal coupling loss).L'Annexe B contient des fichiers vocaux et des séquences de bruit à utiliser avec les méthodes d'évaluation objectives de la qualité vocale. Ces éléments vocaux ne remplacent pas les éléments vocaux contenus dans le Supplément 23.

Citation:	https://handle.itu.int/11.1002/1000/7411
Series title:	P series: Telephone transmission quality, telephone installations, local line networks P.500-P.599: Objective measuring apparatus
Approval date:	2004-05-14
Approval process:	AAP
Status:	Superseded
Observation:	This Amendment includes an electronic attachment containing test speech files and noise sequences of Annex B. Due to the data volume, this Amendment is not downloadable from the ITU website and should be provided from the ITU Sales service. Only the Amendment text is downloadable free of charge for information purposes
Maintenance responsibility:	ITU-T Study Group 12
Further details:	Patent statement(s) Development history [1 related work items in progress] Associated test signals

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
8	P.501 (04/2025)	In force	here	here	here
7.1	P.501 (2020) Amd. 1 (06/2022)	Superseded	here	here	here
7	P.501 (05/2020)	Superseded	here	here	here
6.1	P.501 (2017) Amd. 1 (06/2018)	Superseded	here	here	here
6	P.501 (03/2017)	Superseded	here	here	here
5.3	P.501 (2012) Amd. 3 (06/2015)	Superseded	here	-	here
5.2	P.501 (2012) Amd. 2 (10/2014)	Superseded	here	here	here
5.1	P.501 (2012) Amd. 1 (07/2012)	Superseded	here	here	here
5	P.501 (01/2012)	Superseded	here	here	here
4	P.501 (12/2009)	Superseded	here	here	here
3	P.501 (06/2007)	Superseded	here	here	here
2.1	P.501 (2000) Amd. 1 (05/2004)	Superseded	here	here	here
2	P.501 (05/2000)	Superseded	here	here	here
2.0	P.501 (2000) Err. 1 (09/2001)	Superseded	-	-	here
1	P.501 (08/1996)	Superseded	here	here	here


ITU-T Supplement	Title	Status	Summary	Table of contents	Download
P Suppl. 10 (11/1988)	Considerations relating to transmission characteristics for analogue handset telephones	In force	-	here	here
P Suppl. 16 (11/1988)	Guidelines for placement of microphones and loudspeakers in telephone conference rooms and for group audio terminals (GATs)	In force	-	here	here
P Suppl. 20 (03/1993)	Examples of measurements of handset receive-frequency responses: dependence on earcap leakage losses	In force	-	here	here
P Suppl. 23 (02/1998)	ITU-T coded-speech database	In force	here	here	here
P Suppl. 24 (10/2005)	Parameters describing the interaction with spoken dialogue systems	In force	here	here	here
P Suppl. 25 (01/2011)	Parameters describing the interaction with multimodal dialogue systems	In force	here	here	here
P Suppl. 26 (09/2017)	Scenarios for the subjective evaluation of audio and audiovisual multiparty telemeeting quality	In force	here	here	here
P Suppl. 28 (09/2020)	Considerations for the development of new QoS and QoE related objective models to be embedded in Recommendations prepared by ITU-T Study Group 12	In force	here	here	here
P Suppl. 31 (01/2025)	Subjective quality evaluation of audiovisual communication in videotelephony services	In force	here	here	here

Title	Approved on	Download
Addition to Section 2.3 of the Handbook on Telephonometry	2000	here
Addition to Section 3 of the Handbook on Telephonometry	2000	here
Additions to the Handbook on Telephonometry	1999	here
Telephonometry	1992	here

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ITU-T Recommendations

ITU-T P.501 (2000) Amd. 1 (05/2004)