ETHERNET AVB FOR AUDIO

NETWORKED AUDIO SOLUTIONS


  • Ethernet AVB
  • time-sensitive networks

Today's digital media networks are based on mass market items such as Cat 5 cables, switches and standard hardware components. They are easy to configure, take inputs from many different digital sources and output to a variety of listening hardware, all in real-time and with high quality.

Real-time digital media networks based on the AVB standards provide the highest quality streaming AV experience, and bring major benefits to a variety of industries, including:

  • No compromise AV over mixed-use Ethernet, including sub-microsecond time synchronization and precise presentation times
  • Guaranteed priority for AV traffic with stream reservation and zero data loss
  • Low latency with <2ms packet delivery for class A traffic

xCORE makes it easy for you to solve time-sensitive networking problems like AVB. Each input and output is broken into a separate task that behaves in a completely predictable way. Individual logical cores are used to manage talker inputs and listener output, all controlled by a global clock. Input data is timestamped and output on request by the deterministic architecture that is driven by events instead of interrupts, providing jitter-free data transport.

ETHERNET AVB and AVnu

The AVB standard was developed under the guidance of the AVnu Alliance.

AVnu logo

The XMOS Ethernet AVB solution was the first AVnu-certified Audio Video Bridging (AVB) audio endpoint. It provides a fast time-to-market with a proven, flexible, scalable networked audio connectivity solution.

DOWNLOAD XMOS AVB AUDIO ENDPOINT

 

 

Andy Lucas, XMOS, explains the principles and standards behind Ethernet AVB networks.

 
 

ETHERNET AVB LIBRARIES & COMPONENTS

XMOS provides a wide range of software components and libraries that implement the different standards required for Ethernet AVB.

Standard Function in AVB Audio systems
IEEE1722.1 Discovery, connection management & control
IEEE P1722 Encapsulation protocol
IEC 61883-6 Audio format for P1722
802.1Qat Stream reservation protocol
802.1Qav Flow control
802.1as Timing synchronization
IEEE 1722.MAAP MAC Address Acquisition Protocol
802.1 Ethernet MAC 100Mbit

Additional components available from XMOS include: I2S, TDM, S/PDIF, ADAT; DSP; I2C, SPI, serial and other GPIO.

 

 

John Edwards, XMOS, shows how to set up a flexible AVB network with different configurations, using the AudioScience AVDECC library and XMOS development kits.

 

ETHERNET AVB DEVELOPMENT KITS

XMOS provides a range of development kits for developing Ethernet AVB solutions:

xCORE-200 Multichannel Audio Platform
XK-AUDIO-216-MC
XEF216 multicore microcontroller
  • Star network topologies
    • 10/100/1000Mbits/s Ethernet port
  • Simultaneous talker & listener
  • AVB standards compliant
    • Time synchronization: 802.1AS
    • Traffic shaping: 802.1Qav
    • Bandwidth reservation: 802.1Qat
    • Media transport: IEEE 1722
    • Discovery and management: 1722.1
  • Bit perfect AVB audio transfer
  • PLL recovery of AVB media clock
AVB Audio Endpoint
XK-AVB-LC-SYS
XS1-L16 multicore microcontroller
  • Star network topologies
    • 100Mbits/s Ethernet port
  • Simultaneous talker & listener
    • 8 channels in & out at 48kHz, 24bits
    • 4 channels in & out at 96kHz, 24bits
AVB Audio Daisy Chain
XK-SK-AVB-DC
XS1-L16 multicore microcontroller
  • Star network topologies
    • Dual 100Mbits/s Ethernet port
  • Simultaneous talker & listener
    • 4 channels in & out at 48kHz, 24bits
    • 2 channels in & out at 96kHz, 24bits