New speech processing issues in IP telephony

被引：0

作者：

Beritelli, F ^{[1
]}

Casale, S ^{[1
]}

Ruggeri, G ^{[1
]}

机构：

[1] Dipartimento Ingn Informat & Telecomunicaz, I-95125 Catania, Italy

来源：

2000 INTERNATIONAL CONFERENCE ON COMMUNICATION TECHNOLOGY PROCEEDINGS, VOLS. I & II | 2000年

关键词：

IP Telephony; speech coding; voice activity detection; comfort noise generation; multirate coding;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In the field of IP Telephony there are various problems to be dealt with before the QoS currently guaranteed by PSTN networks can be achieved. Tn this paper we discuss the main causes of degradation in the quality of conversation in an IP communication scenario. We then point out some new QoS problems involved in speech processing. More specifically, two important aspects of discontinuous transmission are dealt with: the impact of the VAD on source throughput and the need for an efficient system of comfort noise. In addition, in a Differentiated services (DiffServ) scenario we demonstrate the importance of using a multirate intrastandard codec, together with valid criteria for the reconstruction of lost frames.

引用

页码：652 / 656

页数：5

共 50 条

[31] Security Risks in IP Telephony
Rezac, Filip
Voznak, Miroslav
Ruzicka, Jan
CESNET CONFERENCE 2008-SECURITY, MIDDLEWARE, AND VIRTUALIZATION-GLUE OF FUTURE NETWORKS, 2008, : 31 - 38
[32] IP telephony GSM interworking
Lemiläinen, J
Haverinen, H
GLOBECOM'99: SEAMLESS INTERCONNECTION FOR UNIVERSAL SERVICES, VOL 1-5, 1999, : 2709 - 2713
[33] Interoperable routing for IN and IP telephony
Helsinki Univ of Technology, Finland
Computer networks and ISDN systems, 2001, 35 (05): : 597 - 609
[34] Riding the IP telephony rocket
Sargent, Michael J.
CTI Magazine, 1999, 4 (01):
[35] Building blocks for IP telephony
Bergmark, D
Keshav, S
IEEE COMMUNICATIONS MAGAZINE, 2000, 38 (04) : 88 - 94
[36] IP telephony for interplanetary exploration
Stone, T
Alena, R
Johnson, M
2004 IEEE AEROSPACE CONFERENCE PROCEEDINGS, VOLS 1-6, 2004, : 1217 - 1230
[37] Traffic analysis for IP telephony
Toral-Cruz, H
Torres-Román, D
2005 2nd International Conference on Electrical & Electronics Engineering (ICEEE), 2005, : 136 - 139
[38] Implementation of ITU-T G. 729 speech codec in IP telephony gateway
Wuhan University Journal of Natural Sciences, 2000, 5 (02) : 159 - 163
[39] Implementation of ITU-T G.729 Speech Codec in IP Telephony Gateway
HUANG Yong feng
Wuhan University Journal of Natural Sciences, 2000, (02) : 159 - 163
[40] LANGUAGE PROCESSING IN CONNECTION WITH SPEECH TRANSLATION AT ATR INTERPRETING TELEPHONY RESEARCH LABORATORIES
KUREMATSU, A
IIDA, H
MORIMOTO, T
SHIKANO, K
SPEECH COMMUNICATION, 1991, 10 (01) : 1 - 9

← 1 2 3 4 5 →