Home Audio over IP IQOYA *LINK Stereo IP Audio Codec
  • Overview
  • Specifications

IQOYA *LINK Stereo IP Audio Codec

Key Workflow: Studio to transmitter links, Studio to studio links

IQOYA *LINK is a stereo IP audio codec specially designed for STL and SSL applications based on IP networks. It has been developed in close collaboration with leading European Telcos around the following themes: full IP connectivity, reliability, IP streaming robustness on managed and unmanaged networks, continuity of audio service on transmitter sites, full remote control and monitoring from SNMP supervisors.

At a glance

IQOYA *LINK is based on a low consumption, fanless, and robust dedicated hardware platform. It includes a rich set of features allowing for the reliable transport of audio content over managed and unmanaged networks (FECs, redundant dual streaming with time diversity, VLANs, QoS, IGMP), and for continuity of audio service on transmitter sites (3 backup levels, backup on SD card, switchable hardware by-pass of audio inputs to outputs in case of power supply failure). It can be used in analog and AES/EBU environments, as well as Livewire, RAVENNA and AES67 environments. In addition, IQOYA *LINK can be fully  controlled and monitored through SNMP.

  • Designed for 24/7 operations
  • Supports legacy audio connectivity (analog, AES/EBU), as well as AoIP (Livewire, AES67, and Ravenna)
  • Reliable IP streaming: FECs, redundant dual streaming with time diversity, management of network errors, real time network metrics
  • Continuity of audio service on transmitter site (3 backup levels, hardware by-pass of audio inputs to outputs in case of power supply failure)
  • Wide range of supported audio formats
  • Full remote control, monitoring, and alarming through SNMP and from WEB GUI

Key features

  • Full-duplex stereo IP audio codec
  • Low consumption and fanless platform adapted to transmitter sites (strong resilience to EMI)
  • Two 10/100 Mbits/s Ethernet ports for separate control traffic and IP audio streaming, or for seamless stream failover (dual redundant streaming), or for a fail-over on a secondary network
  • Balanced analog and AES/EBU inputs/outputs
  • Support for Livewire, AES67, RAVENNA inputs and outputs
  • Audio formats: PCM, MPEG L2 & L3, Fraünhofer AAC-LC, AAC-LD, AAC_ELD, HE-AACv1, HE-AACv2, and optional CSR aptX Enhanced
  • Streaming protocols: RTP, Icecast/Shoutcast, MPEG-TS/IP SPTS on RTP or UDP
  • VLAN tagging (IEEE 802.1q, 802.1p), DSCP, SNMP (SET,GET, Traps), supported by Dataminer
  • Unicast, multi-unicast, multi-multicast, IGMPv3
  • FECs and redundant dual streaming with time diversity up to 2 seconds
  • In-band auxiliary data tunneling (serial data, 8 GPIs)
  • Continuity of audio service on transmitter sites:
    – Backup: IP stream (RTP, Icecast/Shoutcast),  playlist/ sound files on local SD card, audio inputs
    – 3 backup levels
    – Switchable hardware by-pass of inputs to outputs in case of power supply failure
  • Real time metrics on received RTP stream
  • Optional synchronization of decoders for multi-frequency networks (MFN)
  • Intuitive web interface with access rights
  • Front panel LCD display, keypad

ROBUSTNESS

  • Dedicated hardware platform with strong EMC resilience (10 V/m)
  • Fanless design, low-power consumption <10 W
  • Lightning protected network interfaces
  • Digigram FluidIPTM streaming engine
  • 3 levels of backup with selectable source:
    – IP stream: RTP or Shoutcast/Icecast on any of the 2 network ports
    – Physical input (analog or AES/EBU)
    – Sound file or .m3u playlist on SDHC card
  • Configurable backup switching criteria (IP stream loss/recovery duration)
  • Alarm upon silence detection on audio inputs

Professional quality streaming and continuity of service

  • Simultaneous encoding and decoding at the same audio format or different formats
  • Dual redundant streaming (unicast, multicast) with time diversity (up to 1 sec of delay on the redundant stream)
  • Real time measurement of network path quality for main and backup streams
  • Management of network conditions (jitter, lost packets, duplicated packets, disordered packets)
  • Selectable FECs as per RFC2733 (+10%, +20%, +33¨%, +50%, +100%)
  • AAC error concealment implementation
  • Optional audio synchronisation of several IQOYAs via NTP for MFN
    – Constant delay between any pair of decoders of maximum 20ms on a WAN (5ms on a LAN)
    – Possibility to delay the play out up to 6 seconds on the decoders
  • Smart synchronization on the incoming IP stream
  • Ultra low latency (e.g. typical 7ms in PCM, 10 ms in Enhanced-aptX, analog end-to-end)
  • Hardware by-pass of inputs to outputs in case of power failure

Interoperability

  • FNS/ACIP compliant IP audio transport (EBU Tech 3326) (RTP/UDP)
  • HTTP streaming (Icecast/Shoutcast)
  • MPEG-TS/IP streaming (UDP or RTP)
  • Auxiliary data transport: in-band RS232 (RDS UECP) and GPIOs data tunneling

Advanced Networking

  • 2 Ethercon RJ45 IP ports. Can be used for:
    – Separate management traffic and IP audio streaming
    – Dual port redundant streaming
    – Network backup
  • VLAN tagging (IEEE 802.1Q, 802.1p)
  • DSCP support
  • Unicast, mutli-unicast, multicast, multi-multicast (IGMPv3)

 ADMINISTRATION AND SUPERVISION

  • Control, monitoring, alarming trough SNMP (SET, GET, Traps) with MIB for supervisor monitoring
  • Alarms activable on GPOs, SNMP traps, and log traces
  • Persistent log file in case of power failure
  • Intuitive and secure WEB connection (https) and FTP connections
  • WEB user rights management: Read Only, User, Administrator
  • Save/load full codec configuration on SDHC card

Physical specifications

  • Size
    – 19 1U” rack:
    – without mounting brackets: 44 x 441 x 248 mm (~ 1.73 x 17.36 x 9.76 inches)
    – with mounting brackets: 44 x 445 x 248 mm (~ 1.73 x 17.52 x 9.76 inches)
  • Power supply: 100 – 250 VAC, 50-60 Hz switching-mode, automatic voltage detection
  • Temp / humidity (non-condensing)
    – Operating: 0°C – 50°C / 0% – 95%
    – Storage: -5°C – 70°C / 0% – 95%
  • Power consumption at 240 V / 100V: 0.11 A max. / 0.27 A max
  • Net weight : 3.1 kg (∼6.85 lbs)

AUDIO SPECIFICATIONS

INPUTS

  • Analog line inputs (mono): 2 balanced
  • Maximum input level/impedance: +24 dBu / > 10 kΩ
  • Digital input: 1 stereo AES/EBU
  • Analog input gain: 0 dB to +18 dB in 0.5 dB steps
  • Sampling frequencies available:
    – analog: 16 kHz up to 96 kHz at 24-bit data quantization
    – digital (AES): 22 kHz up to 216 kHz using SRC at 24-bit data quantization
  • Dynamic range (A-weighted):
    – Input gain 0 dB:> 107 dB
    – Input gain +18 dB: > 98 dB
  • THD + noise 1 kHz at –2 dBfs:
    – Input gain0 dB: > -90 dB
    – Input gain +18 dB: > -90 dB
  • Analog channel cross talk at 1 kHz:
    – 1 kHz: < -110 dB
    – 15 kHz: <-100 dB
  • Frequency response: 20 Hz-20 kHz +/- 0,3 dB at 48 kHz
  • Additional inputs IQOYA *LINK: 8 OptoIsolated GPIs

Outputs

  • Analog outputs:
    – 2 servo-balanced mono audio outputs, maximum output level = 24 dBu
    – Headphones: max. output level = 8 dBu (2×50 mW / 2×32 Ω load)
  • Impedance IQOYA *LINK: < 100 Ω / IQOYA *LINK/LE: < 50 Ω
  • Sampling frequencies available: 22 kHz up to 96 kHz at 24-bit data quantization
  • Signal-to-noise ratio:
    – Line: > 105 dB, output ref +23 dBu for -1 dBfs, output impedance > 5 kΩ
    – Headphones: > 90 dB at 2×50 mW / 2×32 Ω
  • THD + noise at 1 kHz
    – Line: < -95 dB, output ref +23 dBu for -1 dBfs, output impedance > 5 kΩ
    – Headphones: < -60 dB at 2×50 mW / 2×32 Ω
  • Crosstalk at 1 kHz
    – Line: < -110 dB at 1 kHz, output ref +24 dBu for 0 dBfs, output impedance > 5 kΩ
  • Frequency response at 48 kHz: 20 Hz-20 kHz +/-0.3 dB
  • Additional outputs
    – Stereo headphones (6.35mm jack), max 2×50 mW / 2×32 ohm load
    – 8 relay GPOs characteristics: – 3 SPDT outputs: common, norm. open, .norm. closed,
    max 220 VDC/250 VAC,
    max 60 W, 62.5 VA
    max. continuous/switching current: 2 A/3 A

Connectivity

  • Analog line inputs: 2 female XLR-3
  • Analog outputs: 2 male XLR-3
  • Digital input: 1 female XLR-3
  • Digital output: 1 male XLR-3
  • Headphones output: 6.35 mm jack
  • IP network: 2 female Neutrik™ EtherCon RJ45™ (IP Audio, IP Backup/Control)
  • GPIO: 2 female Sub-D 25

Additional ports

  • RS232 (UART): 1 male Sub-D9
  • USB: 1 USB 1.1 type A, female
  • SD card reader for SDHC memory card

Audio formats

  • PCM linear 16/20/24 bits
  • ITU G.711/722
  • ISO MPEG-1/2 Layer I, Layer II, Layer III
  • MPEG-4 AAC, MPEG-4 AAC-LD, MPEG-4 HE-AACv2, AAC-ELD
  • CSR aptX® Enhanced
  • Opus

MANAGEMENT NETWORK PROTOCOLS

  • HTTPS web server
  • SNMPv2 SET, GET, Traps
  • Skyline Dataminer driver
  • FTP (for SDHC card content management)

Benefits

  • Low TCO: high MTBF (>150 years), no preventive maintenance
  • Easy integration into existing supervision systems: SNMP control, monitoring and alarming, supported by Dataminer
  • Ongoing product support through Digigram Support & Maintenance contracts