Content for TR 26.997 Word version: 18.0.0
1 Scope
2 References
3 Definitions of terms, symbols and abbreviations
3.1 Terms
3.2 Symbols
3.3 Abbreviations
...
...
1 Scope p. 8
The present document provides information on the Immersive Voice and Audio Services (IVAS) codec Selection Phase which was run using the floating point (TS 26.258). Experimental test results from the subjective quality testing are reported to illustrate the behaviour of the IVAS codec. Additional information is provided on implementation complexity of the IVAS codec and objective test results.
2 References p. 8
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 26.250: "Codec for Immersive Voice and Audio Services (IVAS); General overview".
[3] Void
[4]
TS 26.252: "Codec for Immersive Voice and Audio Services (IVAS); Test Sequences".
[5]
TS 26.253: "Codec for Immersive Voice and Audio Services (IVAS); Detailed algorithmic description incl. RTP payload format and SDP parameter definitions".
[6]
TS 26.254: "Codec for Immersive Voice and Audio Services (IVAS); Rendering".
[7]
TS 26.255: "Codec for Immersive Voice and Audio Services (IVAS); Error concealment of lost packets".
[8]
TS 26.256: "Codec for Immersive Voice and Audio Services (IVAS); Jitter buffer management".
[9]
TS 26.258: "Codec for Immersive Voice and Audio Services (IVAS); C code (floating-point)".
[10]
Recommendation ITU-T P.800: "Methods for subjective determination of transmission quality".
[11]
Supplement ITU-T P.Suppl29: "ITU-T P.800 - Use Cases".
[12]
Recommendation ITU-R BS.1534-3: "Method of the subjective assessment of intermediate quality level of audio systems".
[13]
ITU-T Handbook of subjective testing practical procedures, 2011.
[14]
Audio File Format Specifications: WAVE, https://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/WAVE.html .
[15]
AFsp Package https://www-mmsp.ece.mcgill.ca/Documents/Downloads/AFsp/ .
[16]
IEEE Recommended Practice for Speech Quality Measurements, in IEEE Transactions on Audio and Electroacoustics, vol. 17, no. 3, pp. 225-246, September 1969, doi: 10.1109/TAU.1969.1162058.a.
[17]
Recommendation ITU-R BS.2051-3 (05/2022): Advanced sound system for programme production.
[18]
TR 26.952: "Codec for Enhanced Voice Services (EVS); Performance characterization".
[19]
TS 26.445: "Codec for Enhanced Voice Services (EVS); Detailed Algorithmic Description".
[20]
TR 26.996: "Immersive Audio for Split Rendering Scenarios; Performance characterization".
[21]
Recommendation ITU-T P.191 (03/2023): Software tools for speech and audio coding standardization.
[22]
Recommendation ITU-R BS.1770-4 (10/2015): Algorithms to measure audio programme loudness and true-peak audio level.
3 Definitions of terms, symbols and abbreviations p. 9
3.1 Terms p. 9
For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
3.2 Symbols p. 9
Void.
3.3 Abbreviations p. 9
For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.
CL
Cross-check Laboratory
CuT
Codec under Test
DCR
Degradation Category Rating
DTX
Discontinuous transmission
ESDRU
Energy-based Spatial Distortion Reference Unit
EVS
Enhanced Voice Services
FB
Fullband
FEC
Frame Erasure Concealment
FOA
First-Order Ambisonics
GAL
Global Analysis Laboratory
HL
Host Laboratory
HOA2
Higher-Order Ambisonics, 2nd order
HOA3
Higher-Order Ambisonics, 3rd order
HRTF
Head Related Transfer Function
ISM
Independent Stream with Metadata
IVAS
Immersive Voice and Audio Services
ISAR
Immersive Audio for Split Rendering Scenarios
JBM
Jitter Buffer Management
LFE
Low Frequency Enhancement
LL
Listening Laboratory
MASA
Metadata-Assisted Spatial Audio
MC
Multi-channel
MNRU
Modulated Noise Reference Unit
NB
Narrowband
OBA
Object Based Audio
PLC
Packet Loss Concealment
SBA
Scene Based Audio
SDRU
Spatial Distortion Reference Unit
SNR
Signal-to-Noise Ratio
SWB
Super Wideband
TC
Transport Channels
ToR
Terms of Reference
WB
Wideband
WMOPS
Weighted Millions of Operations Per Second
