Parametric Object Coding in IVAS: Efficient Coding of Multiple Audio Objects at Low Bit Rates
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866908440120524800 |
|---|---|
| author | Eichenseer, Andrea Korse, Srikanth Fuchs, Guillaume Multrus, Markus |
| author_facet | Eichenseer, Andrea Korse, Srikanth Fuchs, Guillaume Multrus, Markus |
| contents | The recently standardized 3GPP codec for Immersive Voice and Audio Services (IVAS) includes a parametric mode for efficiently coding multiple audio objects at low bit rates. In this mode, parametric side information is obtained from both the object metadata and the input audio objects. The side information comprises directional information, indices of two dominant objects, and the power ratio between these two dominant objects. It is transmitted to the decoder along with a stereo downmix. In IVAS, parametric object coding allows for transmitting three or four arbitrarily placed objects at bit rates of 24.4 or 32 kbit/s and faithfully reconstructing the spatial image of the original audio scene. Subjective listening tests confirm that IVAS provides a comparable immersive experience at lower bit rate and complexity compared to coding the audio objects independently using Enhanced Voice Services (EVS). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_05409 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Parametric Object Coding in IVAS: Efficient Coding of Multiple Audio Objects at Low Bit Rates Eichenseer, Andrea Korse, Srikanth Fuchs, Guillaume Multrus, Markus Audio and Speech Processing The recently standardized 3GPP codec for Immersive Voice and Audio Services (IVAS) includes a parametric mode for efficiently coding multiple audio objects at low bit rates. In this mode, parametric side information is obtained from both the object metadata and the input audio objects. The side information comprises directional information, indices of two dominant objects, and the power ratio between these two dominant objects. It is transmitted to the decoder along with a stereo downmix. In IVAS, parametric object coding allows for transmitting three or four arbitrarily placed objects at bit rates of 24.4 or 32 kbit/s and faithfully reconstructing the spatial image of the original audio scene. Subjective listening tests confirm that IVAS provides a comparable immersive experience at lower bit rate and complexity compared to coding the audio objects independently using Enhanced Voice Services (EVS). |
| title | Parametric Object Coding in IVAS: Efficient Coding of Multiple Audio Objects at Low Bit Rates |
| topic | Audio and Speech Processing |
| url | https://arxiv.org/abs/2507.05409 |