SIST EN 300 175-8 V2.8.1:2020
(Main)The present document is one of the parts of the specification of the Digital Enhanced Cordless Telecommunications (DECT) Common Interface (CI).
This part of the DECT CI specifies the speech and audio coding and transmission requirements. In order to ensure satisfactory interworking of different portable and fixed units, it is necessary to specify the transmission performance of the analog information over the digital link. This requires not only use of a common speech algorithm, but also standardization of frequency responses, reference speech levels (or loudness) at the air
interface and various other parameters. The present document applies to DECT equipment which includes all the necessary functions to provide real-time two-way speech conversation and stereo audio transmission. Several speech services are defined in the present document, including conventional 3,1 kHz telephony, wideband 7 kHz voice transmission, super-wideband 14 kHz and fullband 20 kHz service. DECT Fixed part providing such services may be connected to the public circuit switched (PSTN/ISDN) network, to private networks or to the Voice over Internet Protocol (VoIP) network. Tethered fixed point local loop applications are not required to comply with the requirements of the present document. For the DECT systems which connect to the Public Switched Telephone Network (PSTN) via an analog interface, the additional requirements, which are implemented in the FP, have as much as possible been aligned with ETSI TBR 038 [29]. A summary of the control and the use of the DECT echo control functions, to guide on need for options to manufacturers and installers, is found in annex A. Information concerning test methods can be found in ETSI EN 300 176-1 [9] and ETSI EN 300 176-2 [10] (previously covered by ETSI TBR 010 [i.5]). The test methods take into account that DECT is a digital system. The present document includes New Generation DECT, a further development of the DECT standard introducing wideband speech, improved data services, new slot types and other technical enhancements. In addition, the present document includes DECT Evolution, providing SWB and FB speech and audio capabilities and a new speech coding algorithm for NB and WB allowing to increase the audio quality of the NB and WB speech service and improve bandwidth efficiency.
Digitalne izboljšane brezvrvične telekomunikacije (DECT) - Skupni vmesnik (CI) - 8. del: Kodiranje in prenos govora in zvoka
Ta dokument je eden od delov specifikacije skupnega vmesnika (CI) za digitalne izboljšane brezvrvične telekomunikacije (DECT).
Ta del specifikacije skupnega vmesnika za digitalne izboljšane brezvrvične telekomunikacije določa zahteve za kodiranje in prenos govora ter zvoka. Za ustrezno medsebojno delovanje različnih prenosnih in fiksnih enot je treba določiti zmogljivost prenosa analognih informacij prek digitalne povezave. Pri tem se poleg uporabe skupnega govornega algoritma zahtevajo tudi standardizacija frekvenčnih odzivov, ravni referenčnega govora (ali glasnost)
pri radijskem vmesniku in drugi različni parametri. Ta dokument se uporablja za opremo digitalnih izboljšanih brezvrvičnih telekomunikacij, ki vključuje vse potrebne funkcije za zagotavljanje dvosmernih govorjenih pogovorov v realnem času in prenos stereo zvoka. V tem dokumentu je določenih več govornih storitev, vključno s standardno telefonsko storitvijo na frekvenci 3,1 kHz, širokopasovnim prenosom glasu na frekvenci 7 kHz, super širokopasovno storitvijo na frekvenci 14 kHz in polnopasovno storitvijo na frekvenci 20 kHz. Fiksni del digitalnih izboljšanih brezvrvičnih telekomunikacij, ki zagotavlja takšne storitve, je lahko povezan z omrežjem PSTN/ISDN, zasebnimi omrežji ali omrežjem prek internetnega protokola (VoIP). Ni nujno, da za uporabo lokalnih zank fiksnih točk v skupni rabi veljajo zahteve iz tega dokumenta. Za sisteme digitalnih izboljšanih brezvrvičnih telekomunikacij, ki so v omrežje PSTN povezani prek analognega vmesnika, so bile dodatne zahteve, uvedene v FP, v največji možni meri usklajene s standardom ETSI TBR 038 [29]. Povzetek nadzora in uporabe funkcij nadzora odmeva DECT ter smernice z opisom možnosti za proizvajalce in montažerje so na voljo v dodatku A. Informacije o preizkusnih metodah so na voljo v standardih ETSI EN 300 176-1 [9] in ETSI EN 300 176-2 [10] (pred tem so bile zajete v standardu ETSI TBR 010 [i.5]). Pri preskusnih metodah se upošteva, da je DECT digitalni sistem. Ta dokument vključuje novo generacijo digitalnih izboljšanih brezvrvičnih telekomunikacij, nadaljnji razvoj standarda za digitalne izboljšane brezvrvične telekomunikacije, ki uvaja širokopasovni govor, izpopolnjene podatkovne storitve, nove tipe rež in druge tehnične izpopolnitve. Poleg tega ta dokument vključuje razvoj digitalne izboljšane brezvrvične telekomunikacije, ki zagotavlja govorne in avdio zmogljivosti za SWB in FB ter nov algoritem kodiranja govora za storitvi NB in WB, kar omogoča večjo kakovost zvoka govornih storitev NB in WB ter izboljšuje zmogljivost pasovne širine.
General Information
Standards Content (sample)
SLOVENSKI STANDARD
SIST EN 300 175-8 V2.8.1:2020
01-februar-2020
Digitalne izboljšane brezvrvične telekomunikacije (DECT) - Skupni vmesnik (CI) - 8.
del: Kodiranje in prenos govora in zvokaDigital Enhanced Cordless Telecommunications (DECT) - Common Interface (CI) - Part
8: Speech and audio coding and transmissionTa slovenski standard je istoveten z: ETSI EN 300 175-8 V2.8.1 (2019-12)
ICS:
33.070.30 Digitalne izboljšane Digital Enhanced Cordless
brezvrvične telekomunikacije Telecommunications (DECT)
(DECT)
SIST EN 300 175-8 V2.8.1:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------SIST EN 300 175-8 V2.8.1:2020
---------------------- Page: 2 ----------------------
SIST EN 300 175-8 V2.8.1:2020
ETSI EN 300 175-8 V2.8.1 (2019-12)
EUROPEAN STANDARD
Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI);
Part 8: Speech and audio coding and transmission
---------------------- Page: 3 ----------------------
SIST EN 300 175-8 V2.8.1:2020
2 ETSI EN 300 175-8 V2.8.1 (2019-12)
Reference
REN/DECT-00328
Keywords
7 kHz, audio, broadband, codec, DECT,
handsfree, IMT-2000, loudspeaking, mobility,
narrowband, quality, radio, speech, TDD, TDMA,
telephony, terminal
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspxIf you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspxCopyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.© ETSI 2019.
All rights reserved.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.
3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners.GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
---------------------- Page: 4 ----------------------
SIST EN 300 175-8 V2.8.1:2020
3 ETSI EN 300 175-8 V2.8.1 (2019-12)
Contents
Intellectual Property Rights .............................................................................................................................. 15
Foreword ........................................................................................................................................................... 15
Modal verbs terminology .................................................................................................................................. 15
1 Scope ...................................................................................................................................................... 16
2 References .............................................................................................................................................. 16
2.1 Normative references ....................................................................................................................................... 16
2.2 Informative references ...................................................................................................................................... 18
3 Definition of terms, symbols and abbreviations ..................................................................................... 20
3.1 Terms ................................................................................................................................................................ 20
3.2 Symbols ............................................................................................................................................................ 21
3.3 Abbreviations ................................................................................................................................................... 22
4 Configurations ........................................................................................................................................ 24
4.1 Reference configuration ................................................................................................................................... 24
4.1.1 Basic configuration ..................................................................................................................................... 24
4.1.2 Portable Part (PP) ....................................................................................................................................... 25
4.1.2.1 Functional organization ......................................................................................................................... 25
4.1.2.2 Volume control ..................................................................................................................................... 25
4.1.3 Fixed Part (FP) ............................................................................................................................................ 26
4.1.3.1 Digital interface ..................................................................................................................................... 26
4.1.3.2 Analog interface .................................................................................................................................... 27
4.1.3.3 FP adaptive volume control .................................................................................................................. 27
4.1.3.4 Voice over IP (VoIP) interface .............................................................................................................. 27
4.2 Test configurations ........................................................................................................................................... 28
5 Encoding ................................................................................................................................................. 28
5.0 General ............................................................................................................................................................. 28
5.1 32 kbit/s full term (ADPCM) G.726 ................................................................................................................. 29
5.1.1 Algorithm .................................................................................................................................................... 29
5.1.2 Bit sequence ................................................................................................................................................ 29
5.1.3 Characteristics of G.726 ADPCM codec .................................................................................................... 29
5.2 64 kbit/s PCM G.711 ........................................................................................................................................ 29
5.2.1 Algorithm .................................................................................................................................................... 29
5.2.2 Bit sequence ................................................................................................................................................ 29
5.2.3 Characteristics of G.711 PCM codec .......................................................................................................... 30
5.2.4 Automatic detection of FAX/modem tone and switch to G.711 ................................................................. 30
5.3 Wideband speech codec G.722 at 64 kbit/s ...................................................................................................... 30
5.3.0 General ........................................................................................................................................................ 30
5.3.1 Algorithm .................................................................................................................................................... 30
5.3.2 Bit sequence ................................................................................................................................................ 30
5.3.3 Characteristics of G.722 wideband codec ................................................................................................... 30
5.3.4 Optional Packet Loss Concealment algorithm (PLC) ................................................................................. 31
5.4 Wideband speech codec G.729.1 up to 32 kbit/s .............................................................................................. 31
5.4.1 Algorithm .................................................................................................................................................... 31
5.4.2 Bit sequence ................................................................................................................................................ 31
5.4.3 Characteristics of G.729.1 codec ................................................................................................................ 31
5.4.4 Packet Loss Concealment algorithm (PLC) ................................................................................................ 32
5.4.5 Supported bit rate in DECT ........................................................................................................................ 32
5.5 Super-wideband MPEG-4 speech and audio coding ........................................................................................ 32
5.5.1 Algorithm .................................................................................................................................................... 32
5.5.2 64 kbit/s, MPEG-4 ER AAC-LD codec ...................................................................................................... 33
5.5.3 32 kbit/s, MPEG-4 ER AAC-LD codec ...................................................................................................... 33
5.6 Narrowband, wideband and super-wideband/fullband LC3plus speech and audio coding .............................. 34
5.6.1 Algorithm .................................................................................................................................................... 34
5.6.2 NB mode at 32 kbit/s gross bit rate ............................................................................................................. 34
5.6.3 WB mode at 32 kbit/s gross bit rate ............................................................................................................ 35
ETSI---------------------- Page: 5 ----------------------
SIST EN 300 175-8 V2.8.1:2020
4 ETSI EN 300 175-8 V2.8.1 (2019-12)
5.6.4 SWB mode at 64 kbit/s gross bit rate .......................................................................................................... 35
5.6.5 FB mode at 64 kbit/s gross bit rate ............................................................................................................. 35
5.6.6 FB mode at 96 kbit/s gross bit rate ............................................................................................................. 36
5.6.7 FB mode at 128 kbit/s gross bit rate ........................................................................................................... 36
6 Transmission aspects .............................................................................................................................. 37
6.1 Relative level .................................................................................................................................................... 37
6.2 Acoustic reference level ................................................................................................................................... 37
6.3 Volume control ................................................................................................................................................. 37
7 Audio specifications ............................................................................................................................... 37
7.1 Overall description ........................................................................................................................................... 37
7.1.1 Introduction to DECT audio specifications ................................................................................................ 37
7.1.2 Introduction to the audio types ................................................................................................................... 37
7.1.3 List of Audio types ..................................................................................................................................... 38
7.1.4 Audio types for Portable Parts .................................................................................................................... 39
7.1.5 Audio types for Fixed Parts ........................................................................................................................ 40
7.1.6 Complete DECT system ............................................................................................................................. 40
7.1.7 Structure of the specification of the audio types ......................................................................................... 40
7.1.8 Audio Types and codecs ............................................................................................................................. 48
7.1.9 Audio Types and physical interfaces .......................................................................................................... 48
7.2 Audio types applicable to Portable Parts .......................................................................................................... 48
7.2.0 General ........................................................................................................................................................ 48
7.2.1 Performance levels of DECT Portable Parts (handsets).............................................................................. 48
7.2.2 Type 0: Reference PP (RePP) ..................................................................................................................... 49
7.2.3 PP Type 1a: "Classic" GAP narrowband handset ....................................................................................... 50
7.2.3.1 Introduction ........................................................................................................................................... 50
7.2.3.2 Compatible services and codecs ............................................................................................................ 50
7.2.3.3 Specification.......................................................................................................................................... 50
7.2.4 PP Type 1b: "Improved" GAP narrowband handset ................................................................................... 50
7.2.4.1 Introduction ........................................................................................................................................... 50
7.2.4.2 Compatible services and codecs ............................................................................................................ 51
7.2.4.3 Specification.......................................................................................................................................... 51
7.2.5 PP Type 1c: HATS-tested "standard" narrowband handset ........................................................................ 51
7.2.5.1 Introduction ........................................................................................................................................... 51
7.2.5.2 Compatible services and codecs ............................................................................................................ 51
7.2.5.3 Specification.......................................................................................................................................... 51
7.2.6 PP Type 1d: HATS-tested "improved" narrowband handset ...................................................................... 52
7.2.6.1 Introduction ........................................................................................................................................... 52
7.2.6.2 Compatible services and codecs ............................................................................................................ 52
7.2.6.3 Specification.......................................................................................................................................... 52
7.2.7 PP Type 3a: HATS tested narrowband "standard" loudspeaking handsfree ............................................... 52
7.2.7.1 Introduction ........................................................................................................................................... 52
7.2.7.2 Compatible services and codecs ............................................................................................................ 52
7.2.7.3 Specification.......................................................................................................................................... 53
7.2.8 PP Type 3b: HATS tested narrowband "improved" loudspeaking handsfree ............................................. 53
7.2.8.1 Introduction ........................................................................................................................................... 53
7.2.8.2 Compatible services and codecs ............................................................................................................ 53
7.2.8.3 Specification.......................................................................................................................................... 53
7.2.9 PP Type 2a: P.311-tested wideband handset............................................................................................... 53
7.2.9.1 Introduction ........................................................................................................................................... 53
7.2.9.2 Compatible services and codecs ............................................................................................................ 53
7.2.9.3 Specification.......................................................................................................................................... 53
7.2.10 PP Type 2b: HATS-tested "standard" wideband handset or headset .......................................................... 54
7.2.10.1 Introduction ........................................................................................................................................... 54
7.2.10.2 Compatible services and codecs ............................................................................................................ 54
7.2.10.3 Specification.......................................................................................................................................... 54
7.2.11 PP Type 2c: HATS tested "improved" wideband handset or headset ......................................................... 54
7.2.11.1 Introduction ........................................................................................................................................... 54
7.2.11.2 Compatible services and codecs ............................................................................................................ 54
7.2.11.3 Specification.......................................................................................................................................... 54
7.2.12 PP Type 4a: HATS tested wideband "standard" loudspeaking handsfree .................................................. 55
ETSI---------------------- Page: 6 ----------------------
SIST EN 300 175-8 V2.8.1:2020
5 ETSI EN 300 175-8 V2.8.1 (2019-12)
7.2.12.1 Introduction ........................................................................................................................................... 55
7.2.12.2 Compatible services and codecs ............................................................................................................ 55
7.2.12.3 Specification.......................................................................................................................................... 55
7.2.13 PP Type 4b: HATS tested wideband "improved" loudspeaking and handsfree .......................................... 55
7.2.13.1 Introduction ........................................................................................................................................... 55
7.2.13.2 Compatible services and codecs ............................................................................................................ 55
7.2.13.3 Specification.......................................................................................................................................... 55
7.2.14 PP Type 5a: super-wideband 14 kHz handset or headset............................................................................ 56
7.2.14.1 Introduction ........................................................................................................................................... 56
7.2.14.2 Compatible services and codecs ............................................................................................................ 56
7.2.14.3 Specification.......................................................................................................................................... 56
7.2.15 PP Type 5b: super-wideband 14 kHz loudspeaking handsfree ................................................................... 56
7.2.15.1 Introduction ........................................................................................................................................... 56
7.2.15.2 Compatible services and codecs ............................................................................................................ 56
7.2.15.3 Specification.......................................................................................................................................... 56
7.2.16 PP Type 6: PPs with external 2 wire, 3,1 kHz telephony interface ............................................................. 56
7.2.16.1 Introduction ........................................................................................................................................... 56
7.2.16.2 Compatible services and codecs ............................................................................................................ 56
7.2.16.3 Specification.......................................................................................................................................... 56
7.2.17 PP Type 7a: fullband 20 kHz handset or headset ........................................................................................ 56
7.2.17.1 Introduction ........................................................................................................................................... 56
7.2.17.2 Compatible services and codecs ............................................................................................................ 57
7.2.17.3 Specification.......................................................................................................................................... 57
7.2.18 PP Type 7b: fullband 20 kHz loudspeaking handsfree ............................................................................... 57
7.2.18.1 Introduction ........................................................................................................................................... 57
7.2.18.2 Compatible services and codecs ............................................................................................................ 57
7.2.18.3 Specification.......................................................................................................................................... 57
7.2.19 PP Type 7c, d, e: fullband 20 kHz stereo audio device ............................................................................... 57
7.2.19.1 Introduction ........................................................................................................................................... 57
7.2.19.2 Compatible services and codecs ............................................................................................................ 57
7.2.19.3 Specification.......................................................................................................................................... 57
7.3 Audio transmission types applicable to Fixed Parts ......................................................................................... 57
7.3.0 General ........................................................................................................................................................ 57
7.3.1 FP Type 0: Reference FP (ReFP) ................................................................................................................ 58
7.3.2 FP Type 1a: "classical" Fixed Part for ISDN Network ............................................................................... 58
7.3.2.1 Introduction ........................................................................................................................................... 58
7.3.2.2 Compatible services and codecs ............................................................................................................ 59
7.3.2.3 Specifications ........................................................................................................................................ 59
7.3.2.3.1 Transcoding and equalization .......................................................................................................... 59
7.3.2.3.2 PP type detection ............................................................................................................................. 59
7.3.2.3.3 Activation of audio processing functions ........................................................................................ 59
7.3.2.3.4 Transmission specification .............................................................................................................. 60
7.3.3 FP Type 1b: Fixed Part for ISDN Network ................................................................................................ 60
7.3.3.1 Introduction ........................................................................................................................................... 60
7.3.3.2 Compatible services and codecs ............................................................................................................ 60
7.3.3.3 Specification.......................................................................................................................................... 60
7.3.3.3.1 Transcoding and equalization .......................................................................................................... 60
7.3.3.3.2 PP type detection ............................................................................................................................. 61
7.3.3.3.3 Activation of audio processing functions ........................................................................................ 61
7.3.3.3.4 Transmission specification .............................................................................................................. 61
7.3.4 FP Type 2: FP with analog 2-wire interface, 3,1 kHz service .................................................................... 61
7.3.4.1 Introduction ........................................................................................................................................... 61
7.3.4.2 Compatible services, physical interfaces and codecs ............................................................................ 62
7.3.4....
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.