TS 26.451 – EVS Codec Voice Activity Detector (VAD) Specification
3GPP TS 26.451 is the 3GPP Technical Specification for EVS Codec Voice Activity Detector (VAD) Specification. It is published in 8 releases (Rel-12 to Rel-19); the latest version is 19.0.0 in Rel-19.
Specifies the Voice Activity Detector (VAD) for EVS codec's Discontinuous Transmission (DTX). Describes the Signal Activity Detection (SAD) algorithm to identify active speech frames.
Releases and versions of TS 26.451
| Release | Latest version | Links |
|---|---|---|
| Rel-19 | 19.0.0 | Read · Download (3GPP) |
| Rel-18 | 18.0.0 | Read · Download (3GPP) |
| Rel-17 | 17.0.0 | Read · Download (3GPP) |
| Rel-16 | 16.0.0 | Read · Download (3GPP) |
| Rel-15 | 15.0.0 | Read · Download (3GPP) |
| Rel-14 | 14.0.0 | Read · Download (3GPP) |
| Rel-13 | 13.0.0 | Read · Download (3GPP) |
| Rel-12 | 12.0.0 | Read · Download (3GPP) |
Scope of TS 26.451
Category: Services (Voice Codecs). Technology generation: Multi-Gen. Network layer: Services.
Who should read this specification?
- Device manufacturers
- Network operators
- Researchers and academics
Implementation notes
Complexity level: Advanced. Implementation difficulty: High.
Key technologies
Specifications referenced by TS 26.451
- TR 26.952 EVS Codec Selection, Verification & Characterization
- TR 21.905 3GPP Terminology and Definitions
- TS 26.441 EVS Audio Processing Introduction
- TS 26.445 EVS Codec Specification
- TS 26.442 EVS Codec Fixed Point ANSI-C Code
- TS 26.443 EVS Codec Floating-Point C Code
- TS 26.444 EVS Codec Test Sequences
- TS 26.446 EVS Codec AMR-WB Backward Compatibility Spec
- TS 26.449 EVS Codec Comfort Noise Generation for DTX
- TS 26.450 EVS Codec DTX System Level Aspects
Specifications that reference TS 26.451
- TS 26.114 IMS Multimedia Telephony Client
- TS 26.441 EVS Audio Processing Introduction
- TS 26.442 EVS Codec Fixed Point ANSI-C Code
- TS 26.443 EVS Codec Floating-Point C Code
- TS 26.446 EVS Codec AMR-WB Backward Compatibility Spec
- TS 26.450 EVS Codec DTX System Level Aspects
- TS 26.444 EVS Codec Test Sequences
- TS 26.452 EVS Codec Fixed-Point C Code Implementation
- TR 26.952 EVS Codec Selection, Verification & Characterization
- TS 26.179 Codecs and Media Handling for MCPTT
- TS 26.453 EVS Codec Generic Frame Format for 3G CS Networks
- TS 26.454 EVS Codec Mapping for 3G CS Networks
Other specifications in the 26 series
- TS 26.447 EVS Frame Loss Concealment Procedure
- TS 26.448 EVS Jitter Buffer Management Specification
- TS 26.449 EVS Codec Comfort Noise Generation for DTX
- TS 26.450 EVS Codec DTX System Level Aspects
- TS 26.452 EVS Codec Fixed-Point C Code Implementation
- TS 26.453 EVS Codec Generic Frame Format for 3G CS Networks
- TS 26.454 EVS Codec Mapping for 3G CS Networks
- TS 26.501 5G Media Streaming Architecture
Related glossary terms
Related topics
Related technologies
Frequently asked questions
What is 3GPP TS 26.451?
3GPP TS 26.451 is the 3GPP Technical Specification for EVS Codec Voice Activity Detector (VAD) Specification. Specifies the Voice Activity Detector (VAD) for EVS codec's Discontinuous Transmission (DTX). Describes the Signal Activity Detection (SAD) algorithm to identify active speech frames.
Which 3GPP releases include TS 26.451?
TS 26.451 is published in 8 releases, from Rel-12 to Rel-19. The latest version on 3GPP Explorer is 19.0.0 (Rel-19).
What category does TS 26.451 belong to?
TS 26.451 belongs to the Services (Voice Codecs) category of 3GPP specifications. It applies to Multi-Gen networks.
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