Content for TS 26.117 Word version: 18.3.0
6 Operation Points
6.1 Introduction
6.2 Speech Operation Points
6.2.1 Introduction
6.2.2 AMR
6.2.3 AMR-WB
6.2.4 EVS
6.3 Audio Operation Points
6.3.1 Introduction
6.3.2 eAAC+ stereo
6.3.3 AMR-WB+
6.3.4 xHE-AAC stereo
6.3.5 IVAS
6.3.6 AAC-ELDv2
6 Operation Points p. 12
6.1 Introduction p. 12
The speech and audio Operation Points defined in this clause are primarily introduced in order to be used as content format in the context of 5G Media Streaming, but not restricted to this use case.
An operation point is a combination of rendering formats and media decoding capabilities.
For each Operation Point, Bitstream and Receiver requirements are detailed in the remainder of clause 6.
Table 6.1 provides an overview of the Operation Points defined in the present document.
| Operation Point name | Format Properties | Decoding and Encoding Capabilities | Reference |
|---|---|---|---|
| AMR speech | Sampling frequency: 8 kHz | AMR | 6.2.2 |
| AMR-WB speech | Sampling frequency: 16 kHz | AMR-WB | 6.2.3 |
| EVS mono | Sampling frequency: 8, 16, 32, 48 kHz | EVS | 6.2.4 |
| eAAC+ stereo | Sampling frequency: 32, 44.1, 48 kHz | eAAC+ | 6.3.2 |
| AMR-WB+ | Sampling frequency: 8, 16, 32, 48 kHz | AMR-WB+ | 6.3.3 |
| xHE-AAC stereo | Sampling frequency: 32, 44.1, 48 kHz | xHE-AAC stereo | 6.3.4 |
| IVAS | Sampling frequency: 16, 32, 48kHz | IVAS | 6.3.5 |
6.2 Speech Operation Points p. 12
6.2.1 Introduction p. 12
This clause defines speech operation points. For each operation point, the requirements for the bitstream as well as for the receiver are defined.
6.2.2 AMR p. 13
6.2.2.1 Bitstream Encoding Requirements p. 13
The following requirements apply to the AMR Operation Point.
Note that the bitstream produced by the AMR encoder consists of 20ms encoded speech frames.
6.2.2.2 Receiver Requirements p. 13
Receivers conforming to the AMR Operation Point shall support the AMR speech media decoding capability according to clause 5.2 and shall support playback of the decoded signal.
6.2.2.3 Sender Requirements p. 13
Senders conforming to the AMR Operation Point shall support the AMR speech media encoding capability according to clause 5.3 in real-time for any speech source format with sampling frequency 8kHz.
6.2.3 AMR-WB p. 13
6.2.3.1 Bitstream Requirements p. 13
The following requirements apply to the AMR-WB Operation Point.
Note that the bitstream produced by the AMR-WB encoder consists of 20 ms encoded speech frames.
6.2.3.2 Receiver Requirements p. 13
Receivers conforming to the AMR-WB Operation Point shall support the AMR-WB speech media decoding capability according to clause 5.2 and shall support playback of the decoded signal.
6.2.3.3 Sender Requirements p. 13
Senders conforming to the AMR-WB Operation Point shall support the AMR-WB speech media encoding capability according to clause 5.3 in real-time for any speech source format with sampling frequency 16kHz.
6.2.4 EVS p. 13
6.2.4.1 Bitstream Encoding Requirements p. 13
The following requirements apply to the EVS Operation Point:
Note that the bitstream produced by the EVS encoder consists of 20ms encoded speech frames.
6.2.4.2 Receiver Requirements p. 14
Receivers conforming to the EVS Operation Point shall support the EVS speech media decoding capability according to clause 5.2 and shall support playback of the decoded signal.
6.2.4.3 Sender Requirements p. 14
Senders conforming to the EVS Operation Point shall support the EVS speech media encoding capability according to clause 5.3 in real-time for any speech source format with sampling frequency 8, 16, 32, 48 kHz.
6.3 Audio Operation Points p. 14
6.3.1 Introduction p. 14
This clause defines audio operation points. For each operation point, the requirements for the bitstream as well as for the receiver are defined.
6.3.2 eAAC+ stereo p. 14
6.3.2.1 Bitstream Encoding Requirements p. 14
The following requirements apply to the eAAC+ stereo Operation Point.
- The sampling frequency shall be either 32 kHz, 44.1 kHz or 48 kHz.
- The bitstream shall be encoded according to clause 7 of TS 26.401, as well as TS 26.403, TS 26.404 and TS 26.405.
6.3.2.2 Receiver Requirements p. 14
Receivers conforming to the eAAC+ stereo Operation Point shall support the eAAC+ media decoding capability according to clause 5.2 and shall support playback of the decoded signal.
6.3.2.3 Sender Requirements p. 14
Senders conforming to the eAAC+ stereo Operation Point shall support the eAAC+ stereo audio media encoding capability according to clause 5.3 in real-time for any stereo audio source format with sampling frequency 32kHz, 44.1kHz, 48kHz.
6.3.3 AMR-WB+ p. 14
6.3.3.1 Bitstream Encoding Requirements p. 14
The following requirements apply to the AMR-WB+ Operation Point.
6.3.3.2 Receiver Requirements p. 15
Receivers conforming to the AMR-WB+ Operation Point shall support the AMR-WB+ media decoding capability according to clause 5.2 and shall support playback of the decoded signal.
6.3.3.3 Sender Requirements p. 15
Senders conforming to the AMR-WB+ Operation Point shall support the AMR-WB+ audio media encoding capability according to clause 5.3 in real-time for any stereo audio source format with sampling frequency 8, 16, 32 or 48 kHz.
6.3.4 xHE-AAC stereo |R18| p. 15
6.3.4.1 Bitstream Encoding Requirements p. 15
The following requirements apply to the xHE-AAC stereo Operation Point.
- The sampling frequency shall be either 32 kHz, 44.1 kHz or 48 kHz.
- The bitstream shall be encoded according to the MPEG-D USAC "Baseline USAC" profile as defined in ISO/IEC 23003-3 [37] and shall contain the metadata sets conforming to the MPEG-D DRC loudness control profile or to the dynamic range control profile, level 1 or higher, as specified in ISO/IEC 23003-4 [38].
6.3.4.2 Receiver Requirements p. 15
Receivers conforming to the xHE-AAC stereo Operation Point shall support the xHE-AAC stereo media decoding capability according to clause 5.2 and shall support playback of the decoded signal.
6.3.4.3 Sender Requirements p. 15
Senders conforming to the xHE-AAC stereo Operation Point shall support the xHE-AAC audio media encoding capability according to clause 5.3 in real-time for any stereo audio source format with sampling frequency 32kHz, 44.1kHz, or 48kHz.
6.3.5 IVAS |R18| p. 15
6.3.5.1 Bitstream Encoding Requirements p. 15
The following requirements apply to the IVAS Operation Point.
- The input audio format shall be either mono, stereo, binaural, multi-channel (5.1, 5.1.2, 5.1.4, 7.1, 7.1.4), scene-based (Ambisonics up to 3rd order), metadata-assisted spatial audio (MASA), object-based, a combined format of objects with scene-based (OSBA), or a combined format of objects with metadata-assisted spatial audio (OMASA).
- The sampling frequency shall be either 8 kHz (only EVS interoperable coding), 16 kHz, 32 kHz and 48 kHz (fullband audio content).
- The bitstream shall be encoded according to TS 26.250, TS 26.252, TS 26.253, and TS 26.258 (floating-point).
6.3.5.2 Receiver Requirements p. 16
Receivers conforming to the IVAS Operation Point shall support the IVAS media decoding capability according to clause 5.2 and shall support rendering and playback of the decoded signal.
6.3.5.3 Sender Requirements p. 16
Senders conforming to the IVAS Operation Point shall support the IVAS-Enc media encoding capability according to clause 5.3 in real-time for the audio formats according to the supported IVAS codec level 1, 2 or 3 as either mono, stereo, binaural, multi-channel (5.1, 5.1.2, 5.1.4, 7.1, 7.1.4), scene-based (Ambisonics up to 3rd order), metadata-assisted spatial audio (MASA), and object-based with sampling frequency 8 kHz (only EVS interoperable coding), 16 kHz, 32 kHz and 48 kHz (fullband audio content).
6.3.6 AAC-ELDv2 |R18| p. 16
6.3.6.1 Bitstream Encoding Requirements p. 16
The following requirements apply to the AAC-ELDv2 Operation Point.
- The sampling frequency shall be either 32 kHz, 44.1 kHz or 48 kHz.
- The bitstream shall be encoded according to MPEG-4 Low Delay AAC v2 Profile Level 2 as specified in ISO/IEC 14496-3 [49].
6.3.6.2 Receiver Requirements p. 16
Receivers conforming to the AAC-ELDv2 Operation Point shall support the AAC-ELDv2 media decoding capability according to clause 5.2 and shall support playback of the decoded signal.
6.3.6.3 Sender Requirements p. 16
Senders conforming to the AAC-ELDv2 Operation Point shall support the AAC-ELDv2 audio media encoding capability according to clause 5.3 in real-time for any stereo audio source format with sampling frequency 32kHz, 44.1kHz, or 48kHz.
