3GPP 26-series – CODECs

The technical specifications (TS) are displayed in blue, while the reports (TR) are shown in green. TS that have been discontinued in earlier releases are indicated with a light blue color. TR in the '9' range that have been stopped are highlighted in light green. TS or TR with a yellow background indicate those updated at the latest Q4-2025 Plenary Meetings. The new ones are displayed with a single red dotted overline.

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click here to see the new 26-series documents introduced at each 3GPP quarterly Plenary Meeting

26.0… 26.1… 26.2… 26.3… 26.4… 26.5… 26.8… 26.9…

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Adaptive Multi-Rate (AMR) Speech Codec
14 p.	TS 26.071	REL 3 → 19	General Description
28 p.	TS 26.073	REL 3 → 19	ANSI-C Code
15 p.	TS 26.074	REL 3 → 19	Test Sequences
51 p.	TS 26.077	REL 4 → 19	Minimum Performance Requirements for Noise Suppresser
57 p.	TS 26.090	REL 3 → 19	Transcoding Functions
15 p.	TS 26.091	REL 3 → 19	Error Concealment of Lost Frames
14 p.	TS 26.092	REL 3 → 19	Comfort Noise Aspects
30 p.	TS 26.093	REL 3 → 19	Source Controlled Rate Operation
27 p.	TS 26.094	REL 3 → 19	Voice Activity Detector (VAD)


22 p.	TS 26.101	REL 3 → 19	AMR Speech Codec – Frame structure
31 p.	TS 26.102	REL 3 → 19	AMR Speech Codec – Interface to Iu, Uu and Nb
31 p.	TS 26.103	REL 3 → 19	Speech Codec List for GSM and UMTS
27 p.	TS 26.104	REL 3 → 19	ANSI-C Code for the floating-point AMR Speech Codec
16 p.	TS 26.110	REL 3 → 19	Codec for Circuit Switched Multimedia Telephony Service – General Description
15 p.	TS 26.111	REL 3 → 19	Codec for Circuit Switched Multimedia Telephony Service – Modifications to H.324
58 p.	TS 26.113	REL 18 → 19	Real-Time Media Communication – Protocols and APIs
517 p.	TS 26.114	REL 7 → 19	IMS Multimedia Telephony – Media Handling and Interaction
9 p.	TS 26.115	REL 4 → 19	Echo Control for Speech and Multimedia Services
48 p.	TS 26.116	REL 13 → 19	Television (TV) over 3GPP Services – Video Profiles
31 p.	TS 26.117	REL 16 → 19	5G Media Streaming (5GMS) – Speech and Audio Profiles
90 p.	TS 26.118	REL 15 → 19	3GPP Virtual Reality Profiles for Streaming Applications
51 p.	TS 26.119	REL 18 → 19	Media Capabilities for Augmented Reality
27 p.	TS 26.130	REL 18 → 19	Speech/Audio Codec RTP Payload Format Conformance for UE Testing
109 p.	TS 26.131	REL 3 → 19	Terminal Acoustic Characteristics for Telephony – Requirements
157 p.	TS 26.132	REL 3 → 19	Speech and Video Telephony Terminal Acoustic Test Specification
46 p.	TS 26.139	REL 16 → 19	RTP/RTCP verification procedures
17 p.	TS 26.140	REL 5 → 19	MMS Media Formats and Codecs
17 p.	TS 26.141	REL 6 → 19	IMS Messaging and Presence – Media Formats and Codecs
40 p.	TS 26.142	REL 7 → 19	Dynamic and Interactive Multimedia Scenes (DIMS)
42 p.	TS 26.143	REL 18 → 19	Messaging Media profiles
31 p.	TS 26.150	REL 9 → 19	Syndicated Feed Reception (SFR) within 3GPP Environments – Protocols and Codecs

Adaptive Multi-Rate - Wideband (AMR-WB) Speech Codec
14 p.	TS 26.171	REL 5 → 19	General Description
23 p.	TS 26.173	REL 5 → 19	C-Source Code
14 p.	TS 26.174	REL 5 → 19	Test Sequences

9 p.	TS 26.177	REL 6 → 19	DSR Extended Advanced Front-End – Test Sequences
11 p.	TS 26.179	REL 13 → 19	Mission Critical Push To Talk (MCPTT) – Codecs and Media Handling

Adaptive Multi-Rate - Wideband (AMR-WB) Speech Codec
53 p.	TS 26.190	REL 5 → 19	Transcoding Functions
16 p.	TS 26.191	REL 5 → 19	Error Concealment of Erroneous or Lost Frames
15 p.	TS 26.192	REL 5 → 19	Comfort Noise Aspects
23 p.	TS 26.193	REL 5 → 19	Source Controlled Rate Operation
17 p.	TS 26.194	REL 5 → 19	Voice Activity Detector (VAD)



Adaptive Multi-Rate - Wideband (AMR-WB) Speech Codec
24 p.	TS 26.201	REL 5 → 19	Frame Structure
16 p.	TS 26.202	REL 5 → 19	Interface to Iu, Uu and Nb
23 p.	TS 26.204	REL 5 → 19	Floating-point C-source code

46 p.	TS 26.223	REL 13 → 19	Telepresence using IMS – Media Handling and Interaction

Cellular Text Telephone Modem
24 p.	TS 26.226	REL 5 → 19	General description
29 p.	TS 26.230	REL 5 → 19	Transmitter bit exact C-code
17 p.	TS 26.231	REL 5 → 19	Minimum Performance Requirements

20 p.	TS 26.233	REL 4 → 15	PSS – General description
177 p.	TS 26.234	REL 4 → 19	PSS – Protocols and codecs
18 p.	TS 26.235	REL 5 → 12	PS conversational multimedia applications – Default codecs
22 p.	TS 26.236	REL 5 → 12	PS conversational multimedia applications – Transport protocols
161 p.	TS 26.237	REL 8 → 19	IMS-based PSS and MBMS user service – Protocols
56 p.	TS 26.238	REL 15 → 19	Uplink streaming framework
27 p.	TS 26.243	REL 6 → 19	DSR extended advanced front-end – Fixed-point ANSI-C code
75 p.	TS 26.244	REL 6 → 19	PSS – 3GP file format
20 p.	TS 26.245	REL 6 → 19	PSS – Timed text format
18 p.	TS 26.246	REL 6 → 19	PSS – 3GPP SMIL language profile
146 p.	TS 26.247	REL 10 → 19	PSS – Progressive Download and Dynamic Adaptive Streaming over HTTP
24 p.	TS 26.249	REL 18 → 19	Immersive Audio for Split Rendering Scenarios Detailed Algorithmic Description of Split Rendering Functions

Codec for Immersive Voice and Audio Services (IVAS)
15 p.	TS 26.250	REL 18 → 19	General overview
12 p.	TS 26.252	REL 18 → 19	Test sequences
864 p.	TS 26.253	REL 18 → 19	Detailed Algorithmic Description including RTP payload format and SDP parameter definitions
15 p.	TS 26.254	REL 18 → 19	Rendering
12 p.	TS 26.255	REL 18 → 19	Error concealment of lost packets
15 p.	TS 26.256	REL 18 → 19	Jitter Buffer Management
51 p.	TS 26.258	REL 18 → 19	C code (floating-point)
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16 p.	TS 26.259	REL 15 → 19	Subjective Test Methodologies for the evaluation of Immersive Audio Systems
51 p.	TS 26.260	REL 15 → 19	Objective Test Methodologies for the evaluation of Immersive Audio Systems
16 p.	TS 26.261	REL 18 → 19	Terminal Audio Quality Performance requirements for Immersive Audio Services
56 p.	TS 26.264	REL 18 → 19	IMS-based AR Real-Time Communication
43 p.	TS 26.265	REL 19	Media Delivery: Video Capabilities and Operation Points

eCall Data Transfer - In-Band Modem Solution
38 p.	TS 26.267	REL 8 → 19	General Description
29 p.	TS 26.268	REL 8 → 19	ANSI-C Reference Code
22 p.	TS 26.269	REL 8 → 19	Conformance Testing

Extended Adaptive Multi-Rate - Wideband (AMR-WB+) Speech Codec
30 p.	TS 26.273	REL 6 → 19	Fixed-Point ANSI-C Code
22 p.	TS 26.274	REL 6 → 19	Conformance Testing

10 p.	TS 26.281	REL 14 → 19	Mission Critical Video (MCVideo) – Codecs and Media Handling
87 p.	TS 26.290	REL 6 → 19	AMR-WB+ Speech Codec – Transcoding Functions


38 p.	TS 26.304	REL 6 → 19	AMR-WB+ Speech Codec – Floating-Point ANSI-C Code
11 p.	TS 26.307	REL 13 → 19	Presentation Layer for 3GPP Services
283 p.	TS 26.346	REL 6 → 19	MBMS protocols and codecs
147 p.	TS 26.347	REL 14 → 19	MBMS – Application Programming Interface and URL
53 p.	TS 26.348	REL 16 → 19	Northbound API for MBMS at the xMB reference point



Enhanced aacPlus General Audio Codec
13 p.	TS 26.401	REL 6 → 19	General Description
19 p.	TS 26.402	REL 6 → 19	Additional Decoder Tools
26 p.	TS 26.403	REL 6 → 19	Encoder specification – AAC part
36 p.	TS 26.404	REL 6 → 19	Encoder specification – SBR part
18 p.	TS 26.405	REL 6 → 19	Encoder specification – Parametric stereo part
14 p.	TS 26.406	REL 6 → 19	Conformance testing
29 p.	TS 26.410	REL 6 → 19	Floating-point ANSI-C code
28 p.	TS 26.411	REL 6 → 19	Fixed-point ANSI-C code

8 p.	TS 26.412	REL 6 → 19	Source Code for 3GP File Format
20 p.	TS 26.430	REL 9 → 19	Timed Graphics

Codec for Enhanced Voice Services (EVS)
14 p.	TS 26.441	REL 12 → 19	General Overview
12 p.	TS 26.442	REL 12 → 19	ANSI C Code (Fixed-Point)
12 p.	TS 26.443	REL 12 → 19	ANSI C Code (Floating-Point)
24 p.	TS 26.444	REL 12 → 19	Test Sequences
654 p.	TS 26.445	REL 12 → 19	Detailed Algorithmic Description
10 p.	TS 26.446	REL 12 → 19	AMR-WB Backward Compatible Functions
86 p.	TS 26.447	REL 12 → 19	Error Concealment of Lost Packets
24 p.	TS 26.448	REL 12 → 19	Jitter Buffer Management
10 p.	TS 26.449	REL 12 → 19	Comfort Noise Generation (CNG) Aspects
10 p.	TS 26.450	REL 12 → 19	Discontinuous Transmission (DTX)
9 p.	TS 26.451	REL 12 → 19	Voice Activity Detection (VAD)
12 p.	TS 26.452	REL 16 → 19	ANSI C Code – Alternative Fixed-Point using Updated Basic Operators
10 p.	TS 26.453	REL 13 → 19	Speech Codec Frame Structure
37 p.	TS 26.454	REL 13 → 19	Interface to Iu, Uu, Nb and Mb


300 p.	TS 26.501	REL 16 → 19	5G Media Streaming (5GMS) – General Description and Architecture
95 p.	TS 26.502	REL 17 → 19	5G Multicast-Broadcast User Service Architecture
57 p.	TS 26.506	REL 18 → 19	5G Real-Time Media Communication Architecture – Stage 2
185 p.	TS 26.510	REL 18 → 19	Media Delivery Interactions and APIs for Provisioning and Media Session Handling
38 p.	TS 26.511	REL 16 → 19	5G Media Streaming (5GMS) – Profiles, Codecs and Formats
202 p.	TS 26.512	REL 16 → 19	5G Media Streaming (5GMS) – Protocols
66 p.	TS 26.517	REL 17 → 19	5G Multicast-Broadcast User Services – Protocols and Formats
52 p.	TS 26.522	REL 18 → 19	5G Real-time Media Transport Protocol Configurations
40 p.	TS 26.531	REL 17 → 19	Data Collection and Reporting – General Description and Architecture
89 p.	TS 26.532	REL 17 → 19	Data Collection and Reporting – Protocols and Formats
57 p.	TS 26.565	REL 18 → 19	Split Rendering Media Service Enabler
47 p.	TS 26.567	REL 19	Split rendering over IMS


60 p.	TR 26.801	REL 16 → 19	UE Supporting Handset Mode with Non-Traditional Earpieces
124 p.	TR 26.802	REL 17 → 19	Multicast Architecture Enhancement for 5G Media Streaming
65 p.	TR 26.803	REL 17	Study on 5G Media Streaming Extensions for Edge Processing
375 p.	TR 26.804	REL 17 → 19	Study on 5G Media Streaming extensions
58 p.	TR 26.805	REL 17	Study on Media Production over 5G NPN Systems
50 p.	TR 26.806	REL 18	Study on Tethering AR Glasses – Architectures, QoS and Media Aspects
41 p.	TR 26.812	REL 18	QoE metrics for AR/MR services
68 p.	TR 26.813	REL 19	Avatar Representation and Communication
91 p.	TR 26.818	REL 15	Virtual Reality (VR) Streaming Audio – Characterization Test Results
53 p.	TR 26.819	REL 19	Study on Spatial Computing for Augmented Reality (AR) Services
116 p.	TR 26.822	REL 19	Study on 5G Real-time Transport Protocol Configurations, Phase 2
13 p.	TR 26.827	REL 12	IMS-based Streaming and Download Delivery enhancements
14 p.	TR 26.830	REL 19	Study on the enhancement for Immersive Real-Time communication for WebRTC; Phase 2
40 p.	TR 26.841	REL 19	Study on Media Messaging
49 p.	TR 26.843	REL 16	Study on Non Bit-Exact Conformance Criteria and Tools for Floating-Point EVS Codec
84 p.	TR 26.847	REL 19	Evaluation of Artificial Intelligence and Machine Learning in 5G media services
61 p.	TR 26.848	REL 12	Enhanced MBMS Operation
34 p.	TR 26.849	REL 12	MBMS Operation On Demand
56 p.	TR 26.850	REL 16	MBMS for IoT
19 p.	TR 26.851	REL 11	Enhancements to Multimedia (EMM) – EMM, DDE and IPME Aspects
61 p.	TR 26.852	REL 13 → 14	MBMS – Extensions and Profiling
56 p.	TR 26.854	REL 19	Study on Haptics in 5G Media Services
74 p.	TR 26.855	REL 19	Study on Film Grain Synthesis
42 p.	TR 26.857	REL 18	5G Media Service Enablers
48 p.	TR 26.861	REL 15	Investigations on Test Methodologies for Immersive Audio Systems
31 p.	TR 26.862	REL 17	ITT4RT Use Cases, Requirements and Potential Solutions
32 p.	TR 26.865	REL 18	Immersive Audio for Split Rendering Scenarios; Requirements
14 p.	TR 26.880	REL 14	Study on MBMS Usage and Codecs for MC Video Service
43 p.	TR 26.881	REL 15	Forward Error Correction (FEC) for Mission Critical Services
43 p.	TR 26.891	REL 16	5G Enhanced Mobile Broadband – Media Distribution


31 p.	TR 26.901	REL 4	AMR-WB Speech Codec – Feasibility Study Report
34 p.	TR 26.902	REL 7 → 19	Video Codec Performance
23 p.	TR 26.903	REL 9 → 19	Improved Video support for PSS and MBMS Services
87 p.	TR 26.904	REL 10 → 19	Improved Video Coding support
58 p.	TR 26.905	REL 11 → 19	Mobile Stereoscopic 3D Video
69 p.	TR 26.906	REL 12 → 19	Evaluation of High Efficiency Video Coding (HEVC) for 3GPP Services
19 p.	TR 26.907	REL 12 → 19	HTML5 for a New Presentation Layer in 3GPP Services
32 p.	TR 26.909	REL 14 → 19	Study on improved Streaming QoE Reporting in 3GPP Services and Networks
26 p.	TR 26.910	REL 16 → 19	Study on Media Handling aspects of RAN Delay Budget Reporting in MTSI
15 p.	TR 26.911	REL 3 → 19	Codecs for CS Multimedia Telephony Service – Terminal Implementor's Guide
40 p.	TR 26.912	REL 3 → 4	Codec for CS Multimedia Telephony Service – Quantitative Perf. Evaluation of H.324 Annex C over 3G
18 p.	TR 26.914	REL 7 → 19	Multimedia Telephony over IMS – Optimization Opportunities
9 p.	TR 26.915	REL 3	Echo Control for Speech and Multi-Media Services
64 p.	TR 26.916	REL 14	Media Handling and Quality aspects of SRVCC
64 p.	TR 26.917	REL 15 → 19	MBMS/PSS enhancements to Support Television Services
131 p.	TR 26.918	REL 15 → 19	Virtual Reality (VR) Media Services over 3GPP
29 p.	TR 26.919	REL 16 → 19	Study on Media Handling aspects of Conversational Services in 5G Systems
143 p.	TR 26.921	REL 16 → 19	Investigations on ambient noise reproduction systems for acoustic testing of terminals
32 p.	TR 26.922	REL 13 → 19	Video Telephony Robustness improvements extensions – Performance Evaluation
32 p.	TR 26.923	REL 13 → 19	Study on Media Handling aspects of IMS-based Telepresence
82 p.	TR 26.924	REL 13 → 19	Study on improved End-to-End QoS Handling for MTSI
37 p.	TR 26.925	REL 16 → 19	Typical traffic characteristics of media services on 3GPP networks
84 p.	TR 26.926	REL 18 → 19	Traffic Models and Quality Evaluation Methods for Media and XR Services in 5G Systems
87 p.	TR 26.927	REL 19	Study on Artificial Intelligence and Machine Learning in 5G media services
133 p.	TR 26.928	REL 16 → 19	Extended Reality (XR) in 5G
39 p.	TR 26.929	REL 16 → 19	QoE Parameters and Metrics relevant to the Virtual Reality (VR) User Experience
289 p.	TR 26.930	REL 18 → 19	Study on the enhancement for Immersive Real-Time communication for WebRTC
56 p.	TR 26.931	REL 15 → 19	Evaluation of Additional Acoustic Tests for Speech Telephony
70 p.	TR 26.933	REL 19	Study on Diverse Audio Capturing system
189 p.	TR 26.935	REL 6 → 19	PS Conversational Multimedia Applications – Performance Characterisation of Default Codecs
56 p.	TR 26.936	REL 6 → 19	Performance Characterization of 3GPP Audio Codecs
45 p.	TR 26.937	REL 5 → 19	PSS – RTP usage model
100 p.	TR 26.938	REL 12 → 19	PSS – improved support for Dynamic Adaptive Streaming over HTTP in 3GPP
92 p.	TR 26.939	REL 15 → 19	Guidelines on the Framework for Live Uplink Streaming
38 p.	TR 26.941	REL 18 → 19	Network Slicing Extensions for 5G media services
71 p.	TR 26.942	REL 19	Study on Media enerGy consumption exposuRE and EvaluatioN framework
22 p.	TR 26.943	REL 6 → 19	Recognition Performance Evaluations of Codecs for Speech Enabled Services (SES)
62 p.	TR 26.944	REL 7 → 19	End-to-End Multimedia Services Performance Metrics
41 p.	TR 26.946	REL 6 → 19	MBMS User Service Guidelines
67 p.	TR 26.947	REL 11 → 19	MBMS – Selection and Characterisation of Application Layer Forward Error Correction (FEC)
63 p.	TR 26.948	REL 13 → 19	Study on Video enhancements in 3GPP Multimedia Services
43 p.	TR 26.949	REL 13 → 19	Video Formats for 3GPP Services
27 p.	TR 26.950	REL 10 → 19	Study on Surround Sound Codec extension for PSS and MBMS
96 p.	TR 26.952	REL 12 → 19	EVS Codec Performance Characterization
38 p.	TR 26.953	REL 14 → 19	Interactivity support for 3GPP-based Streaming and Download Services
23 p.	TR 26.954	REL 14 → 19	Test Plan for Speech Quality and Delay through a Headset Electrical Interface
304 p.	TR 26.955	REL 17 → 19	5G Video Codec Characteristics
182 p.	TR 26.956	REL 19	Evaluation and Characterization of Beyond 2D Video Formats and Codecs
54 p.	TR 26.957	REL 14 → 19	Study on Server And Network-assisted DASH (SAND) for 3GPP Multimedia Services
40 p.	TR 26.959	REL 15 → 19	Study on enhanced Voice over LTE (VoLTE) Performance
31 p.	TR 26.962	REL 17 → 19	ITT4RT Operation and Usage Guidelines
32 p.	TR 26.966	REL 18 → 19	Evaluation of new HEVC coding tools
28 p.	TR 26.967	REL 8 → 19	eCall Data Transfer – In-band Modem Solution
77 p.	TR 26.969	REL 8 → 19	eCall Data Transfer – In-band Modem Solution – Characterization Report
49 p.	TR 26.973	REL 15 → 19	Update to Fixed-Point Basic Operators
65 p.	TR 26.975	REL 3 → 19	AMR Speech Codec – Performance Characterization
106 p.	TR 26.976	REL 5 → 19	AMR-WB Speech Codec – Performance Characterization
49 p.	TR 26.978	REL 4 → 19	Results of the AMR Noise Suppression Selection Phase
88 p.	TR 26.980	REL 13 → 19	Media Handling aspects of Multi-Stream Multiparty Conferencing for MTSI
42 p.	TR 26.981	REL 14 → 19	MBMS extensions for Provisioning and Content Ingestion
19 p.	TR 26.982	REL 18 → 19	Implementation guidelines for Multiparty RTT
29 p.	TR 26.985	REL 16 → 19	V2X Media Handling and Interaction
75 p.	TR 26.989	REL 13 → 19	MCPTT – Media, Codecs and MBMS enhancements for MCPTT over LTE
38 p.	TR 26.996	REL 18 → 19	Immersive Audio for Split Rendering Scenarios Performance characterization
150 p.	TR 26.997	REL 18 → 19	Codec for Immersive Voice and Audio Services (IVAS) Performance characterization
125 p.	TR 26.998	REL 17 → 19	Support of 5G glass-type Augmented Reality / Mixed Reality (AR/MR) devices
35 p.	TR 26.999	REL 17 → 19	Virtual Reality (VR) streaming interoperability and characterization