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Digigram IQOYA *LINK User Manual

Stereo ip audio codec, valid from firmware 3.06c
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IQOYA *LINK
IQOYA *LINK/LE
Stereo IP audio codecs for Studio to Studio Links & Studio to
Transmitter Links
User manual (valid from firmware 3.06c)
August 2016

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Summary of Contents for Digigram IQOYA *LINK

  • Page 1 IQOYA *LINK IQOYA *LINK/LE Stereo IP audio codecs for Studio to Studio Links & Studio to Transmitter Links User manual (valid from firmware 3.06c) August 2016...

  • Page 2: Table Of Contents

    5.1 IQOYA *LINK Front Panel 5.2 IQOYA *LINK/LE Front Panel Use a thin device and insert it in the hole. Press until IQOYA restarts.4.3 IQOYA*LINK and IQOYA *LINK/LE Back Panel 6 INSTALLATION 6.1 Connecting the IQOYA *LINK or IQOYA *LINK/LE 6.2 Connecting the IQOYA *LINK or IQOYA *LINK/LE to an xDSL network...
  • Page 3 A *LINK - IQOYA *LINK/LE SER MANUAL 7.7.2 Encoder output configuration 7.7.2.1 RTP streaming settings 7.7.2.2 Forward Error Correction settings 7.7.2.3 Data tunneling 7.7.2.4 MPEG-TS/IP SPTS streaming settings 7.7.2.5 Adding other unicast / multicast destinations 7.7.3 HTTP streaming settings 7.8 Decoder parameters configuration 7.8.1 Decoder input configuration...
  • Page 4 Important Safety Information . Read carefully before using this equipment! Follow these instructions and keep them in a safe place! Keep in mind that damages due to Throughout this manual, the failure to observe the instructions contained in this manual are not covered by warranty. lightning bolt triangle is used Instructions importantes de sécurité...

  • Page 6: Information For The User

    1 INFORMATION FOR THE USER This equipment has been tested and found to comply with the limits for a CLASS B digital device, pursuant to Part 15 of the FCC Rules and with the following European and international Standards for: User safety: EMC: European Directive 2006/95/EC "Low Voltage...
  • Page 7 IQOYA*LINK and IQOYA*LINK/LE are IP stereo audio codecs of the IQOYA range based on Digigram FluidIP technology. They allow for bi-directional transmission of audio signals over IP networks. Depending on your needs, there are several ways of configuring and controlling IQOYA *LINK or IQOYA *LINK/LE. WEB GUI (control, status)

  • Page 8: Key Hardware Features

    2 KEY HARDWARE FEATURES IQOYA *LINK (yellow) IQOYA *LINK/LE (black) 2 balanced analog mono line inputs, with software programmable analog and digital gain. 2 servo-balanced analog mono line outputs, with analog gain 1 AES/EBU stereo input, with hardware sample rate converters up to 192kHz / 125 dB THD 1 AES/EBU stereo output 1 headphones output (Jack 6.35 mm) with volume...

  • Page 9: Key Software Features

    3 KEY SOFTWARE FEATURES OTHER EXISTING FEATURES IQOYA *LINK IQOYA *LINK/LE Support of unicast, multi-unicast, multicast, multi-multicast addressing Support of IGMP v3 MPEG-TS/IP SPTS streaming Configurable routing table Dual port redundant streaming with time diversity up to 1 second VLAN Tagging + DSCP...

  • Page 10: Release Notes

    ● GPO: a GPO can be used for tunneling or for signaling an alarm. If it is configured for both tunneling and alarming, it only reflects the alarming. ● A digital level can be adjusted for each decoding priority ● Possibility to load the configuration on the SD card when rebooting IQOYA. What’s new on blue IQOYA *LINK and LINK/LE...
  • Page 11 ● Audio source of the encoder can be a Livewire, AES67, or Ravenna IP audio stream. ● Audio destination of the decoder can be a Livewire, AES67, or Ravenna IP audio stream. ● Synchronization on a livewire clock, PTP clock ●...
  • Page 12 stream of priority 1 since the last GET, and saves the other values for the priorities 1 and 2, and resets all the temporary jitters. The other values on both decoding priorities can be read (GET) right after the first GET. The counters evolve till the next GET on the temporary jitter for primary stream of priority 1.

  • Page 13: Front And Back Panels

    5 FRONT AND BACK PANELS 5.1 IQOYA *LINK Front Panel (2) (3) (1) Headphones volume Rotary knob allowing to adjust the volume of the headphones output (2) Headphones output This output allows monitoring: ● the output to be encoded ●...
  • Page 14 Send ● => TX not configured ● green => TX activated Receive ● => RX not configured ● green => the main audio stream is active ● lit red => no packets received ● red/green flashing + Fail-over green => Main stream lost, backup stream is decoded. Network ●...
  • Page 15 (6) & (7) LCD TFT display and keypad This user interface allows to: ● visualize the state of the device: not active/disabled, connected in nominal configuration, connected to a backup ● visualize ‘modulations, i.e. peak meters: RX or TX ● visualize the quality of service and band-width parameters ●...

  • Page 16: Iqoya *Link/Le Front Panel

    5.2 IQOYA *LINK/LE Front Panel (2) (3) (5) (6) (1) Headphones volume Rotary knob allowing to adjust the volume of the headphones output (2) Headphones output This output allows monitoring: ● the output to be encoded ● the analog input ●...
  • Page 17 Playing Not configured Playing Available Playing Missing Failed Playing flashing Failed Not configured or Failed STATUS LED Operation Running flashing Not started SD LED Operation Default Data transfer : read/write operations (6) Reset button This button allows applying default factory settings. Use a thin device and insert it in the hole.
  • Page 18 4.3 IQOYA*LINK and IQOYA *LINK/LE Back Panel Back panel with optional dual -48V power supply 1- Analog audio connectors Two balanced analog mono line inputs and outputs, with software adjustable analog gain and a maximum input level of +24 dBu on XLR-3 connectors Push button for enabling/disabling the hardware bypass of analog inputs to analog outputs.
  • Page 19 5- GPIO connectors IQOYA *LINK: 8 General Purpose Inputs and 8 General Purpose Outputs on two female Sub-D 25 connectors IQOYA *LINK/LE: 4 General Purpose Inputs and 4 General Purpose Outputs on two female Sub-D 25 connectors See the chapter dedicated to the GPIOs for more details (cf. specific appendix, management of the GPIOs).

  • Page 20: Installation

    The default IP address of the “Eth1” port (formerly “IP BACKUP / CONTROL”) is 192.168.1.100. This port is disabled by default. IQOYA *LINK and IQOYA *LINK/LE embed a web server that enables you to control it through your favorite Internet browser.

  • Page 21: Remote Configuration Through Html

    You can now visualize the Web pages that enable you to configure the device. 7.2 WEB access rights IQOYA *LINK and IQOYA *LINK /LE support three categories of users: Administrator, User, Read only “Administrator” category A user from the “Administrator” category has all the access rights on the WEB pages.

  • Page 22: Network Parameters Configuration

    7.3 Network parameters configuration ● Click on the ‘Preferences’ icon ● Click on the “Network” menu ● Select the network interface you want to configure. IQOYA features two physical network interfaces (Eth0 and Eth1), and allows configuring two VLANs per interface (typically a VLAN for IP audio data, and a VLAN for control).
  • Page 23 Type the new IP address into the address bar of the browser to access the IQOYA *LINK again. Do the same for the “ETH1” network interface (IP Backup/Control) if required. By default ETH1 is disabled. Make sure that Eth0 and Eth1 have IP addresses belonging to different subnets.

  • Page 24: Services

    ● Edit the routing table (typically with Notepad). You may add your IP routes, as described in the downloaded file. Note: In case you use both Eth0 and Eth1, do not declare two default gateways. Declare instead one default gateway for instance on Eth0, and routes on Eth1 (or vice versa). ●...

  • Page 25: Snmp

    ● Click on Configure ● Select “Yes” in “Service activation”, and enter the IP address of the NTP server in “Server IP address 1”. You may enter the IP address of a secondary NTP server in “Server IP address 2”. ●...

  • Page 26: Publish/Discover

    ● In case you need SNMP traps, enter the IP address(es) of the target SNMP supervisor(s). Up to 5 IP addresses can be declared. ● It is also possible to change the Community strings for Read; write, and traps. ● Click on “Apply” to save your changes, or “Cancel” to discard them. 7.4.3 Publish/discover This service is useful when IQOYA uses an AES67/RAVENNA input and/or output.

  • Page 27: Ftp

    HTTP traffic exceeding the limitation of +25%. As a consequence, it is recommended to lower the maximum bit rate value to take into account this peak. Example: Network bandwidth limited to 2 Mbits/s Audio format: PCM stereo 16 bits 48 kHz FEC: +10% IP audio bit rate (including FEC): 1 834 800 bits/s Maximum value to be set for parameter ‘Maximum bit rate’: 130 kbits/s...

  • Page 28: Audio Clock

    Audio clock IQOYA supports the following modes for the clock: Clock source Internal PTP Master mode possible AESin PTP Master mode possible PTP AES67 Livewire The clock source is the clock that gives the sampling frequency of IQOYA. Select “Audio Clock”to access the clock settings. IQOYA clock source can be the following.

  • Page 29: Livewire Clock (Available On Iqoya Units With Blue Front Panel)

    ● Activate AES IN SRC: ​ t o be set to “No”. 7.5.1.3 Livewire clock (available on IQOYA units with blue front panel) This external Livewire slave clock is typically to be selected when IQOYA is used for: - encoding and streaming audio samples coming from a low latency (48 samples per packet = 1ms) or Standard (240 samples per packet = 5ms) Livewire stream.

  • Page 30: Clock Settings For Aes Bit Transparent Transport

    ● Synchronous clock is obtained ​ t hanks to E2E or P2P modes, which serve to compensate the delay between Grand master PTP clock and IQOYA. E2E is a more universal setting (it consists of requests and answers between the node (IQOYA) and the grand master PTP clock unit).

  • Page 31: Audio In/Out

    Example of Encoder configuration ● Clock source​ : Select “AESin” on the encoder, and “PTP Slave” on the decoder(s). ● Master clock​ : this field appears when the clock source is set to “internal” or “AESin”.On the encoder, select “PTP (always Master)”. UDP ports 319 and 320 must be opened on the routers, on the way from IQOYA encoder to IQOYA decoder(s).
  • Page 32 0.5 dBu. For instance a selected value of +18 means the input signal max value is +18 dBu. IQOYA *LINK accepts a maximum analog level of +24 dBu. For a level value selected between 6 and 24, the analog input gain is set so that 0 dBfs is reached when the input signal reaches this value.

  • Page 33: Synchronous Aoip In

    Range is from -15 dB to +15dB, in steps of 0.1 dB. 7.5.3 Synchronous AoIP in IQOYA *LINK with blue front panel allows encoding a synchronous AoIP source like a Livewire, AES67, or RAVENNA stream , instead of the analog or AES/EBU input.
  • Page 34 Type = Livewire Livewire channel: ​ s elect the livewire channel, between 1 and 32767. Port: ​ p ort number usually used in Livewire is 5004. IP address:​ this IP address is automatically filled, according to the channel number. Network interface: ​ s elect the network interface for receiving the livewire stream. IGMPv3 filtering mode: ​...

  • Page 35: Synchronous Aoip Out

    Synchronous AoIP out IQOYA *LINK with blue front panel allows decoding an IP stream to a synchronous AoIP stream like a Livewire, AES67, or RAVENNA stream , instead of the analog or AES/EBU output. In most of the cases, the IQOYA decoder (that generates the synchronous AoIP stream), is synchronized on the Livewire or PTP clock.
  • Page 36 IP address/Port:​ target IP address and UDP port of the AES67/RAVENNA stream to generate ​ . Local port: ​ c an be set to default value. DSCP: ​ D SCP value to be set for the frames of the stream (QoS) Sound format: ​...

  • Page 37: Audio Setup

    7.5.5 Audio setup ​ This page allows configuring the audio mode (mono or stereo), the processing granularity of IQOYA, ​ t he decoding priorities switching criteria, and the silence/signal detection on the audio inputs. ● Click on “ ​ C onfigure ” button to be able to modify the parameters. 7.5.5.1 Processing granularity and mode Processing granularity​...

  • Page 38: Audio Input Silence Detection

    the calculated values are always lower to the silence threshold during the defined silence duration, silence condition is reached. - ​ L eft channel only​ : compares the left channel samples to the silence threshold. In case the sample values are always lower to the silence threshold during the defined silence duration, silence condition is reached.

  • Page 39: Other I/Os

    (expressed in ms), and ​ “ Signal drop duration”​ (expressed in ms). Audio signal is considered as recovered if all the following conditions are true: - audio level exceeds the ​ Signal threshol​ d within the “Signal duration” analysis window. - audio level does not stay below the ​...

  • Page 40: Udp Metadata Tunneling

    ● Finally, click on the “Apply” button to apply your new parameters. 7.6.2 UDP metadata tunneling Select “UDP Metadata” to configure the UDP source and/or UDP destination of the metadata. Input UDP metadata ● Enable: ​ S elect “Yes” for accepting metadata to be tunneled from a UDP port. ●...
  • Page 41 ● Viewing the GPIs and GPOs statuses ● Setting the status that a GPO will reflect when the IP stream that is being decoded is lost. Click on the “Configure” button to modify the parameters. ● Tunneling mode​ : Select “Enabled” to enable GPIO tunneling. ●...

  • Page 42: Encoder Parameters Configuration

    IP audio stream (available with blue IQOYAs). IQOYA *LINK and LINK/LE encode an input signal into one audio format, and can stream this in raw RTP, or raw UDP, or MPEG-TS/IP on RTP or UDP, or Icecast/Shoutcast. All stream types, with exception of Icecast/Shoutcast, can be streamed in unicast, multicast, multi-unicast and multi-multicast.

  • Page 43: Encoder Output Configuration

    ● Name​ : Enter a logical name for the audio source. It will then appear in the “ ​ n ame ” field in the “ ​ S ource ” section. ● Type​ : Select “Audio I/O” to encode the inputs selected from “Preferences / Audio / Audio in/out”. or the synchronous AoIP stream configured from “Preferences / Audio / Synchronous AoIP in”.
  • Page 44 be the public IP address of the decoder. In case the decoder is on a LAN interconnected to a WAN via a router, the public IP address of the decoder is the public IP address of the router. The router has to be configured to forward the reception UDP port to the private IP address and UDP port of the decoder.

  • Page 45: Forward Error Correction Settings

    FEC stream. 7.7.2.2 Forward Error Correction settings Forward error correction consists in streaming additional data used by the decoder to rebuild frames that are missing in the received Primary stream. Several FECs are available for selection. For some FEC schemes, additional frames are calculated from the Primary frames.

  • Page 46: Mpeg-Ts/Ip Spts Streaming Settings

    7.7.2.4 MPEG-TS/IP SPTS streaming settings ● IP address / port​ : Enter the destination IP address and UDP port, or destination domain name and UDP port. The IP address can be a unicast address or a multicast address. The unicast target IP address must be the public IP address of the MPEG-TS/IP stream receiver.

  • Page 47: Adding Other Unicast / Multicast Destinations

    7.7.3 HTTP streaming settings IP address: ​ D omain name or IP address of the Shoutcast or Icecast server. ● For instance for an URL like 'http://streamer.digigram.com:6200/Link1', the domain name to be set is 'streamer.digigram.com'. ● Port: ​ S houtcast or Icecast server listening port (usually 80).

  • Page 48: Decoder Parameters Configuration

    7.8 Decoder parameters configuration Four decoding priorities can be defined on the decoder. Priority 1 is typically the main IP audio stream to be decoded. It can be an RTP stream or an HTTP stream. Priority 2 is the first backup in case stream on priority 1 is not received or disabled. It can be an RTP stream or an HTTP stream, an audio signal available on the audio inputs (analog or AES/EBU), a sound file or a playlist on the SDHC card.

  • Page 49: Decoding An Rtp Stream

    ● Name​ : logical name of the stream to be decoded. This name will appear in the “Priority 1” name once changes are applied, as well as in the streaming status information displayed on the top left of the WEB page. ●...
  • Page 50 IQOYA measures in real time the jitter of the network. This is accessible from the “Preferences” page ,“network” section, “IP metrics”. See paragraph also IP Metrics. Field “Max measured jitter (Primary & FEC)” displays the maximum jitter measured taking into account the Primary stream and the FEC stream.

  • Page 51: Decoding An Http Stream

    ● Disabled​ : This parameter allows disabling the Priority. Any of the 3 decoding priorities can be enabled/disabled independently of the other. Disabling a define priority is useful when some servicing is in progress on it (network servicing, servicing on the source of the IP stream). The priority can then be enabled when servicing operations are finished.
  • Page 52 ● Example 1​ : HTTP stream to be decode = ​ h ttp://streamer.digigram:6200/Link1 => IP address = ​ h ttp://streamer.digigram => Port : 6200 => File path or mount point: /Link1 Examples 2​ : HTTP stream to be decode = 192.168.1.200:6200/Link1 =>...
  • Page 53 stored on an SDHC card, or the analog or AES/EBU input; see sections FAIL-OVER, and SDHC CARD MANAGEMENT. Thus, in case the main stream is lost, IQOYA will switch to one of the backup sources, in the order they are defined.
  • Page 54 To select the first backup, click on the “Priority 2” field of the “Source” section. ● From the “Details” section, click on the “Type” list box. ● Select you first backup source from the list and set the appropriate parameters. For a playlist or a sound file on the SDHC card, select the type “File”.
  • Page 55 of IQOYA is not changed). Decoding an IP stream with NTP audio synchronization Decoding an IP stream with audio synchronization based on NTP clock implies that the stream is generated by an IQOYA on which the “Send” section is configured for audio synchronization based on NTP (see paragraph Encoding an IP stream with NTP audio synchronization).
  • Page 56 ● Name​ : You may name the output (this name will appear in the destination section). ● Type​ : Select “Audio I/O” so that decoded audio is played to the define output (physical analog and AES/EBU outputs, or synchronous AoIP stream if it is defined). Select “Audio bus”...
  • Page 57 The presence of the HTTP stream is check every 2 minutes when priority 1 is being decoded, without decoding the HTTP stream. If the HTTP server does not answer within 20 seconds, the HTTP stream is considered as “missing”. Information about the current source is also displayed on the top left of the WEB page. The logical name of the current source is displayed, alternatively with its audio format (detected audio format in case the automatic detection is configured, or format configured from the receive page), as well as the left and right audio levels.
  • Page 58 If the value displayed in the field “Presentation delay margin” is positive of all the decoders, then Presentation delay is correct. It can even be reduced if necessary to lower the latency between encoding and decoding, but must remain positive on all the decoders. If the value “Presentation delay margin”...
  • Page 59 stream. ● In case a backup IP streams are configured (priority 2 and/or 3), statistics about this stream while it is being decoded can be obtained from “IP metrics priority 1” and “IP metrics priority 2”. Status and metrics for PTP synchronization In case IQOYA is configured in “PTP slave mode”, the status of the synchronization is displayed on the top left of the WEB page.
  • Page 60 AUTHORIZING A USER TO UPLOAD PLAYLISTS TO THE SD CARD VIA An SDHC card must be inserted in IQOYA and mounted. As an administrator of the system, you may be interested in granting access to the SD card to a user (user rights).
  • Page 61 The playlist the user will validate will always be displayed with the same name: - c1p2_ftp_guest.m3u for playlist on priority 2. - c1p3_ftp_guest.m3u for playlist on priority 3. Note that you can still see and select your playlists (playlist.m3u on the picture above). Here are the operations the user can do: ●...
  • Page 62 ● The current configuration of the IQOYA codec can also be displayed from a WEB browser by selecting the file \IQOYA_LINK\ Config.html, accessible via FTP. ● The configuration saved on the SD card can be loaded from the IQOYA *LINK front panel LCD display and keyboard.
  • Page 63 From IQOYA *LINK front panel The full configuration can also be saved to SD card from the LCD display and keyboard. With the arrow keys, go to the System menu, and select “Copy config to SD card”. The full configuration can be loaded form the SD card. From System menu, select “Restore config”.
  • Page 64 Download / Upload the audio configuration to/from a remote storage ● Click on the “Preferences” icon: ● From “System” menu, select “Download/upload” ● Click on the “Configure” button to access the parameters. ● To load a configuration into the equipment internal memory, click on “Browse” and select the configuration file.
  • Page 65 FAIL-OVER IQOYA allows keeping an audio program on-air if there are failures on the incoming main IP audio stream, but also if the unit shuts down (power supply failure). Detected failures are: ● Loss of the IP stream (network disconnection, IP stream not received when network is connected).
  • Page 66 (so that the studio can monitor the program actually transmitted), make sure of the following: if the analog output of IQOYA *LINK is processed and transmitted, and if the FM tuner is connected to the analog input, disable the hardware by-pass mode for the analog I/Os on the back panel of IQOYA.
  • Page 67 The full configuration of the codec can be saved to the SDHC card or loaded from the SDHC card. The saving and loading of a configuration to/from an SDHC card can be done from the WEB pages of the IQOYA *LINK. (See paragraph “Saving/loading a configuration”) as well as from the front panel (IQOYA *LINK) The full configuration of the IQOYA codec can also be displayed from a WEB browser by selecting the file \IQOYA_LINK\Config\IqoyaLink_Config.cfg.
  • Page 68 ● Run an FTP client application from your PC and connect to the IP address of the IQOYA, with following login: - user = anonymous - password = iqoya ● The MIB file (IqoyaLink_SNMP_Mib.txt) can be downloaded from folder CONFIG. In case SNMP Traps are used, it is necessary to define the address of the SNMP supervisor(s).
  • Page 69 Notes ● The log file can be viewed from the Preferences page, System menu, Logs. This file can also be downloaded, and reset from that page, ● In case a LINK or LINK/LE decoder has the GPIO tunneling mode enabled, alarms are not sent to GPO.
  • Page 70 Receive secondary The audio source defined on priority 3 is lost. In case of an backup source failed HTTP stream is declared ,this alarm is signaled when the HTTP server cannot be reached. This connection to the HTTP server is checked every 2 minutes. Receive ternary The audio source defined on priority 4 is lost.
  • Page 71 LOG FILE IQOYA *LINK generates traces that are written to a log file. Typically, alarms are written to this log file, if this has been enabled from the “Alarms setup menu”. The log file as a limited size (2000 lines), and is handled as a two 1000 lines blocks. When 2000 lines of traces are reached, the first block which contains the oldest traces is cleared and new traces are written.
  • Page 72 FIRMWARE UPDATE IQOYA can be updated with a new firmware, a patch, or new license. The first phase consists in uploading and checking the software package; during this phase, the audio activity is not stopped. The second phase consists in applying the uploaded package; audio activity is stopped during this phase. IQOYA offers the possibility to keep locally two firmware versions: the currently running version, and the previous version.
  • Page 73 ● From the “​ A ction​ ” drop-down menu, select “Install last uploaded package…” ● It is possible to store the package to the SD card while it is installed. This allows keeping it locally in case a future downgrade is necessary. In case you want to store the package on the SD card, select “Yes”...
  • Page 74 The command line that triggers the reset to factory settings at boot time is: RESET_TO_FACTORY_SETTINGS=Yes Restore the full configuration that has been saved the the SD card RESTORE_FULLCONFIG_FROMSD=Yes IQOYA *LINK DISPLAY & KEYPAD ● The button allows to confirm a selection ​...
  • Page 75 The device can be updated locally by means of an SD card. ● Insert an SDHC card in Microsoft FAT format containing a device update package by Digigram. ● In case several packages are found, select the one to be applied.
  • Page 76 ETHERNET 0 menu (RJ45 “Audio” connector) Displays the network parameters. ● Link status: - active/disabled - full-/half-duplex ● MAC address ● DHCP mode (on/off) ● IP address ● Netmask ● Gateway ● Primary DNS ● Alternate DNS ETHERNET 1 menu (RJ45 “IP Back up / Control” connector) Displays the network parameters.
  • Page 77 Vu-meters Upper section This view displays a stereo vu-meter (RX) for the “Decoder” output, i.e. the incoming IP stream. Lower section This view displays a stereo vu-meter (TX) for the “Encoder” input, i.e. the outgoing IP stream. The vu-meters are divided into three sections: ∞...
  • Page 78 Decoder Source: ● Nominal scenario it can be either an IP source, in this case the display shows: [@IP:#port:TTL] (TTL=time to live) or a file, in this case the display shows [name of current file] ● Or failover (file, analog or AES input, alternate IP stream for optional syndication) ●...
  • Page 79 IQOYA *LINK and *LINK/LE use different standard network protocols. Web server IQOYA *LINK and LINK/LE embed a web server, i.e. you can use your favorite browser to access the html pages composing a mini web site. FTP (File Transfer Protocol) It allows: ●...
  • Page 80 PTP (Precision Time Protocol) This protocol allows very accurate synchronization of equipment. IQOYA can be set as PTP slave, and PTP master. PTP master mode is mainly used for synchronization between an IQOYA encoder and IQOYA decoder(s).
  • Page 81 15 kHz: <-100 dB Frequency response 20 Hz-20 kHz +/- 0,3 dB at 48 kHz Additional inputs IQOYA *LINK:8 opto-isolated GPIs / IQOYA *LINK/LE: 4 opto-isolated GPIs ∗​ can be used with unbalanced signals ∗∗​ can be used as S/PDIF interface as well...
  • Page 83 Line: maximum output level = 24 dBu IQOYA *LINK: Headphones: max. output level = 8 dBu (2x50 mW / 2x32 Ω ​ l oad) IQOYA *LINK: < 100 ​ Ω / ​ I QOYA *LINK/LE: < 50 ​ Ω Impedance Sampling frequencies...
  • Page 84 Optional: MPEG-4 AAC, MPEG-4 AAC-LD, MPEG-4 HE-AACv2, AAC-ELD Management html pages via embedded web server Network protocols http web server: personalized web interface for a flexible management UDP client/server: to send/receive network commands SNMP: enables IQOYA to be managed over the network in very large systems...
  • Page 85 APPENDIX A: SCHEMATIC DIAGRAM APPENDIX B: AUDIO CONNECTORS Audio In Two female XLR-3 connectors for the analog inputs. One for the AES/EBU stereo input. Audio Out Two male XLR-3 connectors for the analog outputs. One for the AES/EBU stereo output. The pinout used on the XLRs is standard: pin 1 carries the signal ground, pin 2 carries the positive signal (“hot”, +) and pin 3 carries the negative signal (“cold”, -).
  • Page 86 GPO_4 GPO_4 GPO_3 GPI_3 GPO_2 GPO_2 GPO_1 GPI_1 Label unused GND N.O. unused N.C. N.O. unused N.C. Lower Sub-D 25 (unused on IQOYA *LINK/LE) GPIO GPO_8 GPI_8 GPO_7 GPO_7 GPO_6 GPI_6 GPO_5 GPO_5 Label unused N.C. N.O. unused N.C. N.O.
  • Page 87 General Purpose Inputs (GPIs) The ​ I QOYA *LINK​ GPIs are compatible TTL 5 V. The GPIs do not require any external power. GPI status is “open” (1) when pin K is not connected to the ground for at least 20ms. GPI status is “closed”...
  • Page 88 General Purpose Outputs (GPOs) The IQOYA*LINK GPOs are opto-isolated SPDT type relays (Single Pole, Double Throw). Each GPO features 3 pins: ● COM : Common ● N.C. : normally closed ● N.O. : normally open According to the status applied to the GPO, pin N.C. is connected to pin COM, or pin N.O. is connected to pin COM.
  • Page 89 * ​ Note: The maximum voltage makes it possible to control devices (up to 60 W. max) directly through the power outlet.
  • Page 90 CTS (clear to send) Not connected IQOYA *LINK and LINK/LE provide an RS232 serial port on a male DB-9 connector on its back panel. Use this port to connect any compatible device. For pinout allocation details, please refer to the figure and table above.
  • Page 91 APPENDIX E: TYPICAL LATENCY VALUES The back to back latency between two IQOYA*LINK devices depends on the selected audio format, the network quality, and the enabled functionalities (backup, half/full duplex, FEC). See the table underneath for maximum latency values in half-duplex, using neither failover configurations nor FEC, with the jitter buffer size set to 0, and with an optimized network.
  • Page 92 APPENDIX F: AAC SETTINGS ​ F OR STEREO SAMPLES AAC type Sampling frequency Audio bit rate IP stream bit rate (Hz) (bit/s) (bit/s) AAC-LC 8250+ Audio bit rate 16000 32000 – 39999 AAC-LC 22050 32000 – 39999 11369+ Audio bit rate AAC-LC 24000 32000 –...
  • Page 93 AAC type Sampling frequency Audio bit rate IP stream bit rate (Hz) (bit/s) (bit/s) AAC-LD 16000 AAC-LD 22050 AAC-LD 24000 80000 – 111999 24750 + Audio bit rate AAC-LD 32000 112000 – 320000 33000 + Audio bit rate AAC-LD 44100 45478 + Audio bit rate AAC-LD...
  • Page 94 APPENDIX G: ENHANCED-APT-X SETTINGS ​ F OR STEREO SAMPLES Sampling Frequency Sample Size Audio Format IP stream bit rate (Hz) (bit/s) (bit/s) 32000 16 bits 256 kb/s 344 Kbits/s 32000 24 bits 384 kb/s 472 Kbits/s 48000 16 bits 384 kb/s 516 Kbits/s 48000 24 bits...
  • Page 95 APPENDIX H: AVAILABLE FEC FEC (Forward Error Correction) is a mechanism which consists in sending redundant information (redundant frames) to the decoder so that it can compensate packet transmission errors on unreliable networks. An FEC can be selected when defining the parameters of the stream to be generated (Send page) and/or to be received (Receive page).
  • Page 96 ● +33% bandwidth, recovery 1/3, 2 streams (audio + FEC) +33% bandwidth, additional delay of 2 frames, recovers 1 lost packet over 3 consecutive packets. ● +25% bandwidth, recovery 1/4, 2 streams (audio + FEC) +25% bandwidth, additional delay of 3 frames, recovers 1 lost packet over 4 consecutive packets. ●...
  • Page 98 APPENDIX I: REDUNDANT DUAL STREAMING Spatial diversity IQOYA *LINK and LINK/LE can be configured to send the same AoIP stream on two distinct networks, typically through Eth0 and Eth1 interfaces. On the decoding side, IQOYA automatically synchronizes both received streams. Using separate network paths ensures that potential network failures are statistically uncorrelated, enabling the reconstruction of a unique unperturbed stream.
  • Page 99 the other Eth interface of the IQOYA that decodes the stream (Eth1), or a multicast address. Select the IP interface used to send the FEC stream (Eh1). Notes: ● When in-band audio format signaling is enabled, FEC stream is sent to the same IP address as the primary stream, and on UDP port + 2.
  • Page 100 APPENDIX J: USE CASES STL with backups Priority 1: IP stream coming from the studio on network 1 Priority 2: IP stream coming from the studio on network 2 Priority3: WEB radio from a CDN Priority 4: playlist on SD card In case of power failure: the decoder output replicates the satellite decoder output (hardware by-pass mode enabled from rear panel)
  • Page 101 STL with redundant dual redundant streaming and time diversity A second network is used to stream the redundant dual stream with a delay. This is the efficient way to recover lost packets that can’t be compensated through a “standard” FEC. STL with transmitter audio monitoring Be careful of the audio loop between transmitter and tuner in case of power failure, due IQOYA by-passing the audio.
  • Page 102 Delivering an MPEG-TS/IP stream to a DVB broadcaster...
  • Page 104 IP backup to satellite In this configuration, the encoding/decoding capability of IQOYA is used on the transmitter site: ● Encoder is configured to stream internally (127.0.0.1) in PCM the input signal (output of the satellite receiver), with stop/start on silence detection enabled. ●...
  • Page 105 Digigram S.A. 82/84 Allée Galilée, 38330 Montbonnot-Saint-Martin, FRANCE Tel: +33 (0)4 76 52 47 47• Fax: +33 (0) 4 76 52 18 44• E-mail: info@digigram.com Digigram Inc. 2000 North 14th Street - Suite 530, Arlington, VA 22201, USA Tel: +1 703 875 9100 •...

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