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Cable networks and transmission of television, sound programme and other multimedia signals
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J.1

[Withdrawn] Terms, definitions and acronyms applicable to the transmission of television and sound-programme signals and of related data signals  

J.2

Guidelines on the use of some ITU-T Recommendations in the J series  

J.11

Hypothetical reference circuits for sound-programme transmissions  
Formerly ITU-R Rec. CMTT 502-2

J.12

Types of sound-programme circuits established over the international telephone network  

J.13

Definitions for international sound-programme circuits  

J.14

Relative levels and impedances on an international sound-programme connection  

J.15

Lining-up and monitoring an international sound-programme connection  

J.16

Measurement of weighted noise in sound-programme circuits  

J.17

Pre-emphasis used on sound-programme circuits  

J.18

Crosstalk in sound-programme circuits set up on carrier systems  

J.19

A conventional test signal simulating sound-programme signals for measuring interference in other channels  
Formerly ITU-R Rec. CMTT 571-2

J.21

Performance characteristics of 15 kHz-type sound-programme circuits - Circuits for high quality monophonic and stereophonic transmissions  
Formerly ITU-R Rec. CMTT 505-5

J.22

[Withdrawn] Performance characteristics of 10 kHz type sound-programme circuits  
Deleted after its content became technically out of date

J.23

Performance characteristics of 7 kHz type (narrow bandwidth) sound-programme circuits  
Formerly ITU-R Rec. CMTT 503-4

J.24

Modulation of signals carried by sound-programme circuits by interfering signals from power supply sources  
Published as ITU-R Rec. CMTT 474-1 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.25

Estimation of transmission performance of sound-programme circuits shorter or longer than the hypothetical reference circuit  
Published as ITU-R Rec. CMTT 605-1 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.26

Test signals to be used on international sound-programme connections  
Published as ITU-R Rec. CMTT 645-1 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.27

Signals for the alignment of international sound-programme connections  
Published as ITU-R Rec. CMTT 661-1 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.31

[Withdrawn] Characteristics of equipment and lines used for setting up 15 kHz type sound-programme circuits  
Deleted because no system or equipment have implemented it during the last two study periods

J.32

[Withdrawn] Characteristics of equipment and lines used for setting up 10 kHz type sound-programme circuits  
Deleted after its content became technically out of date

J.33

[Withdrawn] Characteristics of equipment and lines used for setting up 6.4 kHz type sound-programme circuits  
Deleted because no system or equipment have implemented it during the last two study periods

J.34

[Withdrawn] Characteristics of equipment used for setting up 7 kHz type sound-programme circuits  
Deleted because no system or equipment have implemented it during the last two study periods

J.41

Characteristics of equipment for the coding of analogue high quality sound programme signals for transmission on 384 kbit/s channels  

J.42

Characteristics of equipment for the coding of analogue medium quality sound-programme signals for transmission on 384-kbit/s channels  

J.43

[Withdrawn] Characteristics of equipment for the coding of analogue high quality sound programme signals for transmission on 320 kbit/s channels  
Deleted because no system or equipment have implemented it during the last two study periods

J.44

[Withdrawn] Characteristics of equipment for the coding of analogue medium quality sound-programme signals for transmission on 320 kbit/s channels  
Deleted because no system or equipment have implemented it during the last two study periods

J.51

General principles and user requirements for the digital transmission of high quality sound programmes  
Formerly ITU-R Rec. CMTT 659-1

J.52

Digital transmission of high-quality sound-programme signals using one, two or three 64 kbit/s channels per mono signal (and up to six per stereo signal)  

J.53

Sampling frequencies to be used for the digital transmission of studio-quality and high-quality sound-programme signals  
Published as ITU-R Rec. CMTT 606-1 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.54

Transmission of analogue high-quality sound-programme signals on mixed analogue-and-digital circuits using 384 kbit/s channels  
Published as ITU-R Rec. CMTT 660 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.55

Digital transmission of high-quality sound-programme signals on distribution circuits using 480 kbit/s (496 kbit/s) per audio channel  
Published as ITU-R Rec. CMTT 718 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.56

[Withdrawn] Transmission of high-quality sound-programme analogue signals over mixed analogue/digital circuits at 320 kbit/s  
Was published as ITU-R Rec. CMTT 719 in CCIR Recommendations, Volume XII, Düsseldorf, 1990. Deleted because no system or equipment have implemented it during the last two study periods

J.57

Transmission of digital studio quality sound signals over H1 channels  
Published as ITU-R Rec. CMTT 724 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.61

Transmission performance of television circuits designed for use in international connections  

J.62

Single value of the signal-to-noise ratio for all television systems  
Published as ITU-R Rec. CMTT 568 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.63

Insertion of test signals in the field-blanking interval of monochrome and colour television signals  
Published as ITU-R Rec. CMTT 473-5 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.64

Definitions of parameters for simplified automatic measurement of television insertion test signals  
Published as ITU-R Rec. CMTT 569-2 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.65

Standard test signal for conventional loading of a television channel  
Published as ITU-R Rec. CMTT 570 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.66

Transmission of one sound programme associated with analogue television signal by means of time division multiplex in the line synchronizing pulse  
Published as ITU-R Rec. CMTT 572 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.67

Test signals and measurement techniques for transmission circuits carrying MAC/packet signals  
Formerly ITU-R Rec. CMTT 772-1

J.68

Hypothetical reference chain for television transmissions over very long distances  
Published as ITU-R Rec. CMTT 603 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.73

[Withdrawn] Use of a 12-MHz system for the simultaneous transmission of telephony and television  
Deleted because no system or equipment have implemented it during the last two study periods

J.74

[Withdrawn] Methods for measuring the transmission characteristics of translating equipments  
Deleted because no system or equipment have implemented it during the last two study periods

J.75

[Withdrawn] Interconnection of systems for television transmission on coaxial pairs and on radio-relay links  
Deleted because no system or equipment have implemented it during the last two study periods

J.77

[Withdrawn] Characteristics of the television signals transmitted over 18 MHz and 60-MHz systems  
Deleted because no system or equipment have implemented it during the last two study periods

J.80

Transmission of component-coded digital television signals for contribution-quality applications at bit rates near 140 Mbit/s  
Formerly ITU-R Rec. CMTT 721-2

J.81

Transmission of component-coded digital television signals for contribution-quality applications at the third hierarchical level of ITU-T Recommendation G.702  
Formerly ITU-R Rec. CMTT.723-1

J.82

Transport of MPEG-2 constant bit rate television signals in B-ISDN  

J.83

Digital multi-programme systems for television, sound and data services for cable distribution  

J.84

Distribution of digital multi-programme signals for television, sound and data services through SMATV networks  

J.85

Digital television transmission over long distances - General principles  
Published as ITU-R Rec. CMTT 604-2 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.86

Mixed analogue-and-digital transmission of analogue composite television signals over long distances  
Published as ITU-R Rec. CMTT 658-1 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.87

Use of hybrid cable television links for the secondary distribution of television into the user's premises  

J.88

Transmission of enhanced definition television signals over digital links  

J.89

Transport Mechanism for component-coded digital television signals using MPEG-2 4:2:2 P@ML including all service elements for contribution and primary distribution  

J.Imp89

Implementor's Guide for ITU-T Recommendation J.89  

J.90

Electronic programme guides for delivery by digital cable television and similar methods - Reference operating scenario and requirements  

J.91

Technical methods for ensuring privacy in long-distance international television transmission  

J.92

Recommended operating guidelines for point-to-point transmission of television programmes  

J.93

Requirements for conditional access in the secondary distribution of digital television on cable television systems  

J.94

Service information for digital broadcasting in cable television systems  

J.95

Copy protection of intellectual property for content delivered on cable television systems  

J.96

Technical method for ensuring privacy in long-distance international MPEG-2 television transmission conforming to ITU-T Recommendation J.89  

J.97

Metadata on cable networks  

J.98

Metadata requirements for video-on-demand in cable networks  

J.100

Tolerances for transmission time differences between the vision and sound components of a television signal  
Published as ITU-R Rec. CMTT 717 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.101

Measurement methods and test procedures for teletext signals  
Published as ITU-R Rec. CMTT 720 in CCIR Recommendations, Volume XII, Düsseldorf, 1990

J.110

Basic principles for a worldwide common family of systems for the provision of interactive television services  

J.111

Network independent protocols for interactive systems  
Guidelines for the implementation of Rec. J.111 may be found in Supplement 3 to J series (1998).

J.112

Transmission systems for interactive cable television services  
Example of linking options between annexes of Rec. J.112 and annexes of Rec. J.83 may be found in Supplement 1 to J series (1998). Guidelines for the implementation of annex A of Rec. J.112 may be found in Supplement 2 to J series (1998).

J.Imp112

Implementor's Guide (04/03) for ITU-T Recommendation J.112 Annex B (03/01)  

J.113

Digital video broadcasting interaction channel through the PSTN/ISDN  

J.114

Interaction channel using digital enhanced cordless telecommunications  

J.115

Interaction channel using the global system for mobile communications  

J.116

Interaction channel for local multipoint distribution systems  

J.117

Home digital network interface specification  

J.118

Access systems for interactive services on SMATV/MATV networks  

J.120

Distribution of sound and television programs over the IP network  

J.121

Quality control protocol for webcasting  

J.122

Second-generation transmission systems for interactive cable television services - IP cable modems  

J.Imp122

Second-generation transmission systems for interactive cable television services - IP cable modems  

J.123

Multiplexing format for webcasting on the TCP/IP network  

J.124

Multiplexing format for multimedia webcasting over TCP/IP networks  

J.125

Link privacy for cable modem implementations  

J.126

Embedded Cable Modem device specification  

J.Imp126

Implementor's Guide for ITU-T Recommendation J.126 Embedded Cable Modem device specification  

J.127

Transmission protocol for multimedia webcasting over TCP/IP networks  

J.128

Set-top gateway specification for transmission systems for interactive cable television services  

J.131

Transport of MPEG-2 signals in PDH networks  

J.132

Transport of MPEG-2 signals in SDH networks  

J.133

Measurement of MPEG-2 transport streams in networks  

J.140

Subjective picture quality assessment for digital cable television systems  

J.141

Performance indicators for data services delivered over digital cable television systems  

J.142

Methods for the measurement of parameters in the transmission of digital cable television signals  

J.143

User requirements for objective perceptual video quality measurements in digital cable television  

J.144

Objective perceptual video quality measurement techniques for digital cable television in the presence of a full reference  

J.145

Measurement and control of the quality of service for sound transmission over contribution and distribution networks  

J.146

Loop latency issues in contribution circuits for conversational TV programmes  

J.147

Objective picture quality measurement method by use of in-service test signals  

J.148

Requirements for an objective perceptual multimedia quality model  

J.149

Method for specifying accuracy and cross-calibration of Video Quality Metrics (VQM)  

J.150

Operational functionalities for the delivery of digital multiprogramme television, sound and data services through multichannel, multipoint distribution systems (MMDS)  

J.151

RF remodulator interface for digital television  

J.160

Architectural framework for the delivery of time-critical services over cable television networks using cable modems  

J.161

Audio and video codec requirements and usage for the provision of bidirectional audio services over cable television networks using cable modems  

J.162

Network call signalling protocol for the delivery of time-critical services over cable television networks using cable modems  

J.163

Dynamic quality of service for the provision of real-time services over cable television networks using cable modems  

J.164

Event message requirements for the support of real-time services over cable television networks using cable modems  

J.165

[Withdrawn] IPCablecom Internet signalling transport protocol (ISTP)  
This Recommendation was deleted on 2008-02-08 since it was not widely implemented and was no longer required by cable operators

J.166

IPCablecom Management Information Base (MIB) framework  

J.167

Media terminal adapter (MTA) device provisioning requirements for the delivery of real-time services over cable television networks using cable modems  

J.168

[Withdrawn] IPCablecom Media Terminal Adapter (MTA) MIB requirements  

J.169

[Withdrawn] IPCablecom network call signalling (NCS) MIB requirements  

J.170

IPCablecom security specification  

J.171

[Withdrawn] IPCablecom Trunking Gateway Control Protocol (TGCP)  
ITU-T Rec. J.171 (2002) was reorganized into J.171.0, .1 and .2 when revised in 2005

J.171.0

IPCablecom trunking gateway control protocol (TGCP): Profiles overview  
ITU-T Rec. J.171 (2002) was reorganized into J.171.0, .1 and .2 when revised in 2005

J.171.1

IPCablecom trunking gateway control protocol (TGCP): Profile 1  
ITU-T Rec. J.171 (2002) was reorganized into J.171.0, .1 and .2 when revised in 2005

J.171.2

IPCablecom trunking gateway control protocol (TGCP): Profile 2  
ITU-T Rec. J.171 (2002) was reorganized into J.171.0, .1 and .2 when revised in 2005

J.172

IPCablecom management event mechanism  

J.173

IPCablecom embedded MTA primary line support  

J.174

[Withdrawn] IPCablecom interdomain quality of service  

J.175

Audio server protocol  

J.176

[Withdrawn] IPCablecom management event mechanism MIB  

J.177

IPCablecom CMS subscriber provisioning specification  

J.178

IPCablecom CMS to CMS signalling  

J.179

IPCablecom support for multimedia  

J.180

User requirements for statistical multiplexing of several programmes on a transmission channel  

J.181

Digital program insertion cueing message for cable television systems  

J.182

Parameter sets for analogue interface specifications for the interconnection of set-top boxes and presentation devices in the home  

J.183

Time-division multiplexing of multiple MPEG-2 transport streams over cable television systems  

J.184

Digital broadband delivery system: Out-of-band transport  

J.185

Transmission equipment for transferring multi-channel television signals over optical access networks by frequency modulation conversion  

J.186

Transmission equipment for multi-channel television signals over optical access networks by sub-carrier multiplexing (SCM)  

J.187

Transport mechanism for component-coded digital high-definition television signals using MPEG-2 video coding including all service elements for contribution and primary distribution  

J.188

A framework for an efficient parallel video transmission system including codecs with functions of failure detection and picture quality evaluation  

J.189

Seamless splicing for MPEG-2 bit streams  

J.190

Architecture of MediaHomeNet  

J.191

IP feature package to enhance cable modems  

J.Imp191

IP Feature Package to enhance cable modems  

J.192

A residential gateway to support the delivery of cable data services  

J.193

Requirements for the next generation of set-top-boxes  

J.195.1

Functional requirements for high speed transmission over coaxial networks connected with fibre to the building  

J.195.2

Physical layer specification for high speed transmission over coaxial networks  

J.195.3

Medium Access Control layer specification for high speed transmission over coaxial networks  

J.197

High level requirements for a Digital Rights Management (DRM) bridge from a cable access network to a home network  

J.199

Battery backup for cable-based devices  

J.200

Worldwide common core - Application environment for digital interactive television services  

J.201

Harmonization of declarative content format for interactive television applications  

J.202

Harmonization of procedural content formats for interactive TV applications  

J.203

Common core for digital video recorder platform  

J.204

Metrics gathering specification  

J.205

Requirements for an application control framework using integrated broadcast and broadband digital television  

J.206

Architecture for an application control framework using integrated broadcast and broadband digital television  

J.210

Downstream RF interface for cable modem termination systems  

J.211

Timing interface for cable modem termination systems  

J.212

Downstream external Physical layer interface for modular cable modem termination systems  

J.213

Layer 2 virtual private networks for IP cable modem systems  

J.214

Cable modem TDM emulation interface  

J.215

Client digital program insertion API  

J.218

Cable modem IPv4 and IPv6 eRouter specification  

J.222.0

Third-generation transmission systems for interactive cable television services - IP cable modems: Overview  

J.222.1

Third-generation transmission systems for interactive cable television services - IP cable modems: Physical layer specification  

J.222.2

Third-generation transmission systems for interactive cable television services - IP cable modems: MAC and Upper Layer protocols  

J.222.3

Third-generation transmission systems for interactive cable television services - IP cable modems: Security services  

J.240

Framework for remote monitoring of transmitted picture signal-to-noise ratio using spread-spectrum and orthogonal transform  

J.241

Quality of service ranking and measurement methods for digital video services delivered over broadband IP networks  

J.242

A method to reconstruct the received video sequence seen at the receiver using transmission error information to monitor the perceptual video quality at the receiver in digital cable television and video telephony  

J.243

Requirements for operational monitoring in television programme transmission chains  

J.244

Full reference and reduced reference calibration methods for video transmission systems with constant misalignment of spatial and temporal domains with constant gain and offset  

J.245

Subjective assessment method of picture quality assessed in the home  

J.246

Perceptual visual quality measurement techniques for multimedia services over digital cable television networks in the presence of a reduced bandwidth reference  

J.247

Objective perceptual multimedia video quality measurement in the presence of a full reference  

J.248

Requirements for operational monitoring of video-to-audio delay in the distribution of television programs  

J.249

Perceptual video quality measurement techniques for digital cable television in the presence of a reduced reference  

J.260

Requirements for preferential telecommunications over IPCablecom networks  

J.261

Framework for implementing preferential telecommunications in IPCablecom and IPCablecom2 networks  

J.262

Specifications for authentication in preferential telecommunications over IPCablecom2 networks  

J.263

Specification for priority in preferential telecommunications over IPCablecom2 networks  

J.280

Digital program insertion: Splicing application program interface  

J.281

Requirements for multichannel video signal transmission over IP-based fibre network  

J.282

Architecture of multi-channel video signal distribution over IP-based networks  

J.283

IP network architecture with network layer route diversity providing resilient IP multicast video distribution  

J.284

Requirements and framework for gathering electronic content over IP-based network  

J.285

Architecture for synchronised programme transfer with pull operation over IP-based networks  

J.286

Seamless splicing for heterogeneous ITU-T H.262 | ISO/IEC 13818-2 (MPEG-2 video) and ITU-T H.264 | ISO/IEC 14496-10 bitstreams  

J.287

Automation System to Compression System Communications Applications Program Interface (API)  

J.290

Next generation set-top box core architecture  

J.291

Next generation set-top-box cable architecture  

J.292

Next generation set-top box media-independent architecture  

J.293

Component definition and interface specification for the next generation set-top box  

J.294

Residential gateway requirements for the support of broadcast and IP-based interactive services over cable television networks  

J.295

Functional requirements for a hybrid cable set-top box  

J.296

Specifications for a hybrid cable set-top box  

J.301

Requirements of Augmented Reality Smart Television System  

J.340

Reference algorithm for computing peak signal to noise ratio of a processed video sequence with compensation for constant spatial shifts, constant temporal shift, and constant luminance gain and offset  

J.341

Objective perceptual multimedia video quality measurement of HDTV for digital cable television in the presence of a full reference  

J.342

Objective multimedia video quality measurement of HDTV for digital cable television in the presence of a reduced reference signal  

J.360

IPCablecom2 architecture framework  

J.361

IPCablecom2 codec and media  

J.362

IPCablecom2 control point discovery  

J.363

IPCablecom2 data collection to support accounting  

J.365

IPCablecom2 application manager interface  

J.366.0

IPCablecom2 IP Multimedia Subsystem (IMS): Delta Recommendations overview  

J.366.1

Organization of subscriber data specification  

J.366.2

IPCablecom2 IP Multimedia Subsystem (IMS): Session handling - IM call model - Stage 2 specification  

J.366.3

IPCablecom2 IP Multimedia Subsystem (IMS): Stage 2 specification  

J.366.4

IPCablecom2 IP Multimedia Subsystem (IMS): Session Initiation Protocol (SIP) and Session Description Protocol (SDP) - Stage 3 specification  

J.366.5

IP multimedia subsystem Cx and Dx interfaces; Signalling flows and message contents specification  

J.366.6

Specification of the Cx and Dx interfaces based on the Diameter protocol  

J.366.7

IPCablecom2 IP Multimedia Subsystem (IMS): Access security for IP-based services  

J.366.8

IPCablecom2 IP Multimedia Subsystem (IMS): Network domain security specification  

J.366.9

IPCablecom2 IP Multimedia Subsystem (IMS): Generic authentication architecture specification (3GPP TS 33.220)  

J.366.10

Zh and Zn interfaces based on the Diameter protocol; Stage 3 specification  

J.367

IPCablecom2 presence specification  

J.368

IPCablecom2 quality of service specification  

J.369

IPCablecom2 E-UE provisioning framework specification  

J.370

IPCablecom2 embedded user equipment provisioning data model specification  

J.380.1

Digital program insertion - Advertising systems interfaces - Advertising systems overview  

J.380.2

Digital program insertion - Advertising systems interfaces - Core data elements  

J.380.3

Digital program insertion - Advertising systems interfaces - Management interface  

J.380.4

Digital program insertion - Advertising systems interfaces - Content information service  

J.380.5

Digital program insertion - Advertising systems interfaces - Placement opportunity information service  

J.380.6

Digital program insertion - Advertising systems interfaces - Subscriber information service  

J.380.7

Digital program insertion - Advertising systems interfaces - Message transport  

J.380.8

Digital program insertion - Advertising systems interfaces - General information service  

J.381

Requirements for advanced digital cable transmission technologies  

J.382

Advanced digital downstream transmission systems for television, sound and data services for cable distribution  

J.388

Real-time video and audio transmission system over IP networks  

J.460.0

IPCablecom2 residential SIP telephony: Feature definition  

J.460.1

IPCablecom2 residential SIP telephony: Feature specification  

J.460.2

IPCablecom2 residential SIP telephony: embedded digital voice adapter (E-DVA) specification  

J.460.3

IPCablecom2 residential SIP telephony: Usage data recording  

J.460.4

IPCablecom2 residential SIP telephony: Embedded-user equipment provisioning specification  

J.600

Transport of Large Screen Digital Imagery (LSDI) applications that employ MPEG-2 encoded HDTV signals  

J.601

Transport of Large Screen Digital Imagery (LSDI) applications for its expanded hierarchy  

J.602

Network service operator's requirements for real-time transmission of exLSDI signals under parallel processing functionality  

J.603

Real-time transmission system of exLSDI signals under spatial image segmentation for parallel processing  

J.604

Requirements for a scalable video transmission system over cable networks  

J.700

IPTV service requirements and framework for secondary distribution  

J.701

Broadcast-centric IPTV terminal middleware  

J.702

Enablement of current terminal devices for the support of IPTV services  

J.703

IPTV client control interface definition  

J.704

Functional requirements of the service provider interface for television primary and secondary distribution and associated interactive services  

J.705

IPTV client provisioning, activation, configuration and management interface definition  

J.706

Overview of the distribution of target-specific content  

J.707

Messages and protocols enabling the distribution of target-specific content within integrated broadband cable networks  

J.800.0

Cable assigned names and numbers  

J.800.1

Cable DHCP Registry  

J.800.2

Cable definition MIB specification  

J.900

Requirements for Stereoscopic Three Dimensional Television Service over Hybrid Fiber and Coaxial based networks  

J.901

Requirements for the free viewpoint television (FTV) video transmission system  

J.902

Multilayered data structure for scalable view-range representation  

J.1001

Requirements for renewable conditional access system  

J.1002

Pairing protocol specification for renewable conditional access system  

J.1003

Specifications of network protocol for renewable conditional access system  

J.1101

Functional requirements for IP-based switched digital video using data over cable service interface specifications  

J.Sup1

Example of linking options between annexes of ITU-T Recommendation J.112 and annexes of ITU-T Recommendation J.83  

J.Sup2

Guidelines for the implementation of annex A of Recommendation J.112, "Transmission systems for interactive cable television services" - Example of digital video broadcasting (DVB) interaction channel for cable television distribution  

J.Sup3

Guidelines for the implementation of Recommendation J.111 "Network independent protocols" - Example of digital video broadcasting (DVB) systems for interactive services  

J.Sup4

[Withdrawn] Terminology for new services in television and sound-program transmission  

J.Sup5

Guidelines on the use of some ITU-T Recommendations in the J series  

J.Sup12

[Withdrawn] Intelligibility of crosstalk between telephone and sound-programme circuits  

 

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