AES/EBU
AES = Audio Engineering Society
EBU = European Broadcasting Union
A digital audio interface for professional use. Similar to the consumer version S/PDIF. The first version (now known as AES3) uses a balanced cable to transmit the audio in digital form using time division multiplex for data.
AES-3id describes how to use an unbalanced coaxial cable to transmit the data.
| AES3 | AES-3id | |
|---|---|---|
| Connector | XLR-3 | BNC |
| Interface | Balanced | Unbalanced |
| Cabling | 110 Ω shielded TP | 75 Ω coaxial |
| Max length | 1000 m | 100 m |
| Output level | 2-7 Vpp | 1.0 Vpp |
| Max output | 7 Vpp | 1.2 Vpp |
| Max current | 64 mA | 1.6 mA |
| Min input | 0.2 Vpp | 0.32 Vpp |
| Modulation | biphase-mark-code | |
| Subcode information | ASCII ID text | |
| Max. Resolution | 24 bits | |
The electrical characteristics of AES/EBU are based on on RS-422, so basically any differential RS-422 chip will do as the receiver and transmitter chips. S/PDIF coaxial interface is not specifically based on any other standard I know of (but is quite similar in signal levels and bandwidth requirements to some video signals).
See also
- S/PDIF (some AES/EBU information there as well)
Standards
- IEC 60958-3:2006 (old name: IEC 958-3:1989)
- JEITA CPR-1205 (former EIAJ CP-340 1987-9 & EIAJ CP-1201)
- (CP-1201 Japanese equivalent of IEC 60958)
- (CP-340 Japanese equivalent of AES/EBU)
- EBU tech 3250-E 2004
- AES3-1992
- AES-3id-2001
- ANSI S4.40-1992 (American equivalent of AES3-1992)
- AES3-1992 AES Recommended Practice for Digital Audio Engineering - Serial transmission format for two-channel linearly represented digital audio data.
Contributors
Sources
- ePanorama.net: S/PDIF by Tomi Engdahl