1、 STD-ITU-T RECMN SERIES P SUPP 23-ENGL 1999 4962591 Ob52726 305 INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Series P Supplement 23 (02198) SERIES P: TELEPHONE TRANSMISSION QUALITY, TELEPHONE INSTALLATIONS, LOCAL LINE NETWORKS ITU-T coded-speech databas
2、e Supplement 23 to ITU-T P-series Recommendations (Previously CCITT Recommendations) STD.ITU-T RECMN SERIES P SUPP 23-ENGL 3998 4862593 Ob52727 241 ITU-T P-SERIES RECOMMENDATIONS TELEPHONE TRANSMISSION QUALITY, TELEPHONE INSTALLATIONS, LOCAL LINE NETWORKS Vocabulary and effects of transmission param
3、eters on customer opinion of transmission quality Series P.10 Subscribers lines and sets Transmission standards Objective measuring apparatus Objective electro-acoustical measurements Measurements related to speech loudness Methods for objective and subjective assessment of quality Audiovisual quali
4、ty in multimedia services Series P.30 Series P.40 Series P.50 Series P.60 Series P.70 Series P.80 P.800 Series P.900 P.300 P.500 For further details, please refer to ITU-T List of Recommendations. SUPPLEMENT 23 TO ITU-T P-SERIES RECOMMENDATIONS ITU-T CODED-SPEECH DATABASE Summary Supplement 23 to th
5、e P series of ITU-T Recommendations is a database of coded and source speech material used in the ITU-T 8 kbit/s codec (Recommendation G.729) characterization tests. The purpose of this database is to provide source, pre-processed and processed speech material, and related subjective test plans and
6、scores, for the development of new and revised ITU Recommendations relating to objective voice quality measures. The coded speech database is delivered on three CD-ROMs. Source Supplement 23 to ITU-T P-series Recommendations was prepared by ITU-T Study Group 12 1998. I (1997-2000) and was approved u
7、nder the WTSC Resolution No. 5 procedure on the 27th of February STD-ITU-T RECMN SERIES P SUPP 23-ENGL 1778 4862571 0652729 014 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization
8、Sector (IT-T) is a permanent organ of the ITU. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), whic
9、h meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information
10、 technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. IN
11、TELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property
12、 Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU had received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implem
13、entors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 1998 Ail rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including phot
14、ocopying and microfilm, without permission in writing from the ITU. 11 P series - Supplement 23 (02/98) STD-ITU-T RECMN SERIES P SUPP 23-ENGL 1999 D 48b257L Ob52730 836 CONTENTS Page 1 2 2.1 2.2 2.3 2.4 2.5 3 4 Background . Structure of the database . Document files (Disk #1. directory “doc“) Speech
15、 files (Disks #1. #2 and #3) . Subjective opinion data files (Disc #1. directory “opinion“) Control string files (Disc # 1. directory Ilists) Background noise files (Disc #1. directory “noise“) . README file . References P series . Supplement 23 (02/98) 1 2 2 . 111 Supplement 23 to P-series Recommen
16、dations ITU-T CODED-SPEECH DATABASE (Geneva, 1998) 1 Background In the process of standardizing Recommendation P.861 under Question 13/12, it was found that providing a coded-speech database is helpful for developing and/or optimizing objective speech quality measures. After reviewing results of sub
17、jective tests carried out in Study Group 12, it was decided to construct the database using the materials from the characterization phase tests for the G.729 speech codec 12. These tests consist of three different experiments. Five organizations agreed to release the speech data: ATI: 3 O E % vf .CI
18、 L 3 3 m + I STD=ITU-T RECMN SERIES P SUPP 23-EMGL 1998 m 4962594, 0652737 190 m . _.,_.,_._. . . eries A eries B eries C D leries E ieries F leries G ;cries H Geries I ;cries J series K series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Serie
19、s Y Series Z ITU-T RECOMMENDATIONS SERIES Organization of the work of the ITU-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone tel
20、ecommunication services Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated services digital network Transmission of television, sound programme and other multimedia signals Protection against interference Construction, installation and protecti
21、on of cables and other elements of outside plant TMN and network maintenance: international transmission systems, telephone circuits telegraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifications of measuring equipment Telepho
22、ne transmission quality, telephone installations, local line networks Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communications Global information infrastructure Programming languages Printed in Switzerland Geneva, 1998
