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Aeta Audio Systems Scoop5 S-IP User Manual

Stereo audio codec for real time audio transmission
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Stereo audio codec for real time audio transmission
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  • Page 1 Stereo audio codec for real time audio transmission User Manual...

  • Page 3: Table Of Contents

    4. Detailed operating mode – Embedded HTML pages ........36 4.1. Equipment start-up ........................36 4.2. Accessing the Scoop5 S-IP html pages ..................37 4.3. Principles of operation with html pages ..................38 4.4. Detailed presentation of the html pages ................... 39 4.5.
  • Page 4 6.3. Some methods to deal with NAT routers and firewalls ............. 79 6.4. V35 interface adaptation ......................84 6.5. Notice regarding open source code ................... 84 7. Index ........................85 Scoop5 S-IP - User Manual...

  • Page 5: Presentation - Getting Started

    1. Presentation – Getting started The Scoop5 S-IP codec allows the bi-directional transmission of one or two audio signals with bit rate reduction, over digital leased lines or IP protocol networks. The codec includes an Ethernet interface for IP transmission, and X24/X21 interfaces for transmission over digital leased lines.
  • Page 6 Status indicators on front panel Ethernet/IP remote control Embedded html server Programmable set-up/dial memories Remote control serial port, isolated control and status loops  Secondary Ethernet interface for remote control Table 1 – Main features of the Scoop5 S-IP Scoop5 S-IP - User Manual...

  • Page 7: Install And Connect Scoop5 S-Ip

    1.1. Install and connect Scoop5 S-IP  Plug on a power source: the Scoop5 S-IP automatically starts up. To put it on stand-by or restart it, press the key (top left corner on the front panel) for at least 3 seconds.
  • Page 8 See in this manual on page 49 for configuration details. 1 Network Address Translation, applied in most cases by such routers Scoop5 S-IP - User Manual...

  • Page 9: Functions

    Last, the audio signals are output to both digital and analogue outputs. In addition to the main task of transmitting an audio programme, the Scoop5 S-IP can also transmit auxiliary information, usually by embedding them inside the transmitted audio streams.

  • Page 10: Transmission Interfaces

    This mode can be used on all types of networks links, LAN or WAN, including links via Internet. The Scoop5 S-IP implements the SIP protocol, which allows it to interoperate with IP phones and other SIP compatible audio codecs, in a way similar to ISDN or POTS connections. This protocol is also required by the “N/ACIP”...
  • Page 11 On the other hand, Internet cannot support this routing mode. In this mode, the Scoop5 S-IP uses the RTP protocol to manage the audio stream, like in the unicast mode, but the SIP protocol is not applicable here; instead a proprietary signalling system is used. As the link is unidirectional, the unit has to be set either as a “sender”...
  • Page 12 This operation mode is available as an option. In the unicast mode with SIP, the Scoop5 S-IP can be uses as two independent mono codecs. Each of these is then a mono SIP codec that can set an audio link in two ways: ...
  • Page 13 If this is the LL interface (leased line), this is a permanent connection. Otherwise, for the Ethernet/IP interface, the audio transmission implies a link/session setup phase.  Either the link is initiated by the unit itself, or rather the operator of the Scoop5 S-IP: call to a remote destination. ...

  • Page 14: Audio Encoding And Decoding

    2.2. Audio encoding and decoding Scoop5 S-IP features a wide range of coding algorithms. Their availability depends on the transmission network used. Besides, the MPEG family algorithms feature a large configuration flexibility. 2.2.1. Single codec In this mode, the selected network interface (Ethernet/IP or LL) is used to set a link with a single remote device.
  • Page 15 This algorithm operates in mono for a net nominal bit rate of 24 kbit/s, and provides 7 kHz bandwidth and a quality close to G722 for a much lower bit rate. CELP is available only for IP transmission (single AoIP codec). Scoop5 S-IP - User Manual...
  • Page 16 The latency is rather high with these sampling rates. MPEG L2 is available for LL or IP networks (single or double AoIP codec). In leased line mode, an optional protection against transmission errors (FEC) is also available, of Reed- Solomon type. Scoop5 S-IP - User Manual...
  • Page 17 In the Scoop5 S-IP, the configuration stays very simple: the user just imposes the audio channel format (mono/stereo) and the desired bit rate, and the codec automatically adjusts the other parameters (for instance the audio bandwidth).

  • Page 18: Audio Interfaces

    Note: as the audio output is monitored immediately after decoding, this monitoring position is not sensitive to the possible activation of the audio test loop (see further the chapter about test loops), contrarily to the physical audio outputs (both analog and digital). Scoop5 S-IP - User Manual...

  • Page 19: Auxiliary Functions

    2.4. Auxiliary functions The main function of the Scoop5 S-IP is the transmission of one or two main audio programmes, but it also provides auxiliary functions for transmitting data or additional signals, inside the same stream (or, more generally, the same session).
  • Page 20 2.4.2. Transmission of GPIO For IP transmission (single SIP/AoIP codec), Scoop5 S-IP also allows, in the same way as the two isolated relays, to transmit 6 additional binary signals, routed to “GPIO” interfaces, which are not isolated. This feature is available whatever the coding algorithm (except for linear coding L16, L20, L24).

  • Page 21: Supervision And Control Interface

    2.5.1. Embedded html server: “web pages” Scoop5 S-IP provides html pages that enable full control using a web browser, via port 80 (default port for the HTTP protocol). See on chapter 4 the detailed operation mode.
  • Page 22 Note: this test loop is not available for every network interface.  “Audio feedback” loop (audio output to audio input); this allows the codec to send back to the remote codec the signal it receives, after decoding and re-encoding. Scoop5 S-IP - User Manual...

  • Page 23: Operation

    4: Detailed operating mode – Embedded HTML pages. Using the Scoop Manager software (installed on a Windows PC computer), it is possible to manage calls on a pool of Scoop5 S-IP codecs. Please consult us for more information about the features of the Scoop Manager software.

  • Page 24: Physical Description Of The Equipment

    3.2. Physical description of the equipment The Scoop5 S-IP codec is housed in a 19 inches chassis of 1U height (44 mm or 1.75”). It includes a universal mains power supply. There is an option for powering from a 12V DC source (which can be used in parallel with the mains input, with priority to the latter).
  • Page 25 “Internal alarm” contact;  “External alarm” contact. This port can be used as an alternative interface for connecting the codec to transmission equipment in “leased line” mode. See the wiring in: 5.1.6 - “Alarm + X24/X21” interface. Scoop5 S-IP - User Manual...
  • Page 26 Figure 3 – Rear panel Scoop5 S-IP - User Manual...
  • Page 27 “Digital I/O” socket [10] This 15-pin male sub-D socket is the interface for the GPIO transmission function (as described in 2.4.2). Its wiring is described in: 5.1.11 - “Digital I/O” interface . Scoop5 S-IP - User Manual...

  • Page 28: Installation And Set Up

    Then to set up links you must select the coding type and parameters. A computer with a web browser, linked to the Scoop5 S-IP via the local area network, is required to perform this initial set up. It is also useful to have on this computer the “AetaScan” utility software (see further 3.4.3, Using the “AetaScan”...
  • Page 29 Otherwise, with the “genlock” setting (which is the default factory setting), an alarm is raised because of the lack of a suitable signal on the AES input. In the “master” mode, the device ignores this error condition. Scoop5 S-IP - User Manual...

  • Page 30: Initial Setup Of The Ethernet Interface

    3.4.1. DHCP server available This is usually simpler. By default (“factory setting”) Scoop5 S-IP is set as a DHCP client. Thus at start up it is automatically allocated its IP configuration by the DHCP server. The same applies to the computer used for set up.
  • Page 31 If this address is reachable from the computer, you can enter it in the address bar of the web browser and access the html pages of the Scoop5 S-IP. Then you can set up the addressing as required, via the “E...
  • Page 32 THERNET ” page (“N ” tab). ARAMETERS ETWORK  As soon as you get access to the html pages via an Ethernet interface (either main or secondary), you can set the parameters for both interfaces. Scoop5 S-IP - User Manual...

  • Page 33: Managing Links

    In a similar way, ending/releasing a link is either initiated by the remote unit (remote release), or by the operator of the Scoop5 S-IP (local release). 3.5.2. Auto-redial feature In LL mode, the unit is always supposed to be linked, and it will transmit and look for a reception signal as long as it is on.
  • Page 34 The “loop control” input can be used in LL mode for setting up a backup link: see following chapter 3.5.4. Scoop5 S-IP - User Manual...
  • Page 35 3.5.4. Setting up a backup link The Scoop5 S-IP has the capability for backing up a permanent leased line audio link thanks to a “switched” link (IP). A typical example of this application is shown in the following diagram, where a permanent leased line is used for transmitting a radio programme from a studio to a transmitter.
  • Page 36 Of course, both units should be configured in an adequate configuration for each transmission mode, and then each codec can be set in the LL mode to start the normal operation. Scoop5 S-IP - User Manual...

  • Page 37: First Level Maintenance

    JP2 to prevent “External” alarms to light on the LED.  Engage the cover on the back and slide it back to its place.  Remount the three screws to secure the cover. Scoop5 S-IP - User Manual...
  • Page 38 2 Fault of the network clock source currently used for synchronisation (X21/X24 main port or secondary port) 3 Note: this loop is only available for LL transmission 4 This loop is not only available for LL transmission Scoop5 S-IP - User Manual...
  • Page 39 After this reset, the Scoop5 S-IP will be brought back to its “factory” configuration with all parameters in their default value, especially: blank password, Ethernet interface set for auto link mode, DHCP client enabled.

  • Page 40: Detailed Operating Mode - Embedded Html

    The embedded html server in Scoop5 S-IP provides a comfortable and efficient means to control and monitor the unit. It just needs the Scoop5 S-IP to be connected to an IP network and to be reachable from a computer, or another device with an html browser: tablet, smartphone…...

  • Page 41: Accessing The Scoop5 S-Ip Html

    4.2. Accessing the Scoop5 S-IP html pages Once the Scoop5 S-IP is connected on an IP network, the first step is to get its IP address, following the procedure described above in 3.4, Initial setup of the Ethernet interface. Then, on the control device, launch the html browser and enter the IP address of the Scoop5 S-IP in the “address”...

  • Page 42: Principles Of Operation With Html

    On top you find a bar of tabs corresponding to the various categories of functions and parameters for the Scoop5 S-IP. Clicking a tab you access either a page, or a drop-down list for selecting a secondary page. These tabs and pages are detailed in the following chapters.

  • Page 43: Detailed Presentation Of The Html

    The quality indicator for the transmission direction is not always available, as this depends on the capability of the remote codec. 1 Some older browsers may not display the bargraph, but in such case a numeric value (e.g. “-8 dB”) is displayed on the page. Scoop5 S-IP - User Manual...
  • Page 44 “Send”.  When the scoop5 S-IP is configured as a double AoIP codec, additional blocks are displayed for managing the links on codec 2. Scoop5 S-IP - User Manual...
  • Page 45 ” tab proposes one page for each profile category, with a list of the profiles already ROFILE recorded in the Scoop5 S-IP memory, each with its index and name. The page allows you to manage these profiles, with following capabilities: ...
  • Page 46 Snapshots are in fact managed on the “A ” page, and this “Snapshots” choice on the “P ” tab UDIO ROFILES just redirects to the “A ” page. See further the description of the audio page. UDIO Scoop5 S-IP - User Manual...
  • Page 47 Remember to save the changes, clicking the “Save” button! 1 Remind that the algorithm settings are memorized separately for each network interface. When switching the default interface, the codec settings for this interface are recalled. Scoop5 S-IP - User Manual...
  • Page 48 Note: in contrast to the configuration with DHCP, the “static” setting has to be reviewed each time you move the unit to a new physical site/network, as the previous IP addressing is probably not valid for the new location. Scoop5 S-IP - User Manual...
  • Page 49 Settings regarding the Ethernet interface and IP addressing are especially critical, because this is just the interface you are controlling Scoop5 S-IP through. You can lose control because of a mistake in the settings; it might even be the normal expected consequence for a configuration change. So be very careful with the settings on this page! In case control is lost after an error, you must perform the initial Ethernet setup as described in 3.4,...
  • Page 50 STUN Server: enter the address of the STUN server, either in numeric form or with a symbolic name. This kind of server allows Scoop5 S-IP to discover its public IP address when it accesses the Internet through a router with NAT. You can use AETA’s server: stun.aeta-audio.com.
  • Page 51 SIP Port: the default port for SIP signaling is 5060 (UDP), you can enter a different value here. Note: this port number is valid for the Scoop5 S-IP itself, not the server. For the server side, if a non-standard port is used, e.g. 5070, the “SIP Registrar” field must specify the port after a colon like in “mySIPserver:5070”.
  • Page 52 This block is related to the possible double AoIP codec mode.  Double SIP mono: when this box is checked, the Scoop5 S-IP operates as a double SIP codec. This choice is incompatible with a default protocol other than SIP. In this case, if a SIP server is used (SIP Registration parameter active), the SIP account data of the “SIP”...
  • Page 53 2 => packet replication with interleaving: the second packet is delayed; robustness is improved but latency is somewhat increased. Remember to save the changes on this page, clicking the “Save” button on each relevant block! Scoop5 S-IP - User Manual...
  • Page 54 AES Sampling Rate: sampling rate to be used in the “Master” mode. In the Genlock mode, this setting has no direct influence because the codec “follows” whatever sampling frequency is set by the AES input. Scoop5 S-IP - User Manual...
  • Page 55  Click the “Load” button and directly apply the snapshot (also possible using the “Save” buttons, but one frame at a time).  Click “Delete” to remove the selected snapshot from the list of snapshots. Scoop5 S-IP - User Manual...
  • Page 56 Switch the network interface and select the Ethernet interface: the Opus configuration is restored. Remember to save the changes, clicking the “Save” button!  When the Scoop5 S-IP is set as a double AoIP codec, the “A ” block is duplicated as can be LGORITHM seen below, replaced by a “C 1”...
  • Page 57 1 Note: to be able to use these servers 1) access to the Internet from the codec must not be restricted, 2) a DNS must be set so the symbolic names can be resolved. Scoop5 S-IP - User Manual...
  • Page 58  Click the “Update” button.  The process begins, and a warning message is also displayed on the Scoop5 S-IP front panel.  Wait for the completion of the update. The process takes a few minutes. Normally the unit should reboot by itself at the end of the process.
  • Page 59 “OK” in the dialog box which then shows up. This is equivalent for Scoop5 S-IP to an off/on power cycle. Of course, you must wait for the return to the normal operative state before regaining control via the html pages.
  • Page 60 “Update”. The file must be a file previously exported from a Scoop5 S-IP (same unit, or another). The settings or memories included in the file are respectively applied to the codec, or recorded in its memory of profiles/snapshots.
  • Page 61  Alarms related to the audio interfaces: audio clipping (minor alarm), AES input errors.  Hardware alarms (internal alarms): possible power failure. Scoop5 S-IP - User Manual...

  • Page 62: Setting Up An Ip Link

    “receiver” devices. 4.5.1. Preliminary settings If a SIP server is used, the Scoop5 S-IP must be registered on this server. Use the “Network” tab, “A ” page (see above on page 46) for entering the SIP account data and activate the SIP ARAMETERS registration.
  • Page 63 When a call is received, the units negotiate automatically a commonly acceptable coding algorithm, and set the link automatically. On the receiving side, Scoop5 S-IP will “follow” the calling unit preference. The receiving and processing of an incoming call is visible in the “L ”...
  • Page 64 Note: if not registering on a SIP server, it is not possible to address specifically one codec or the other. An incoming call directed to the IP address of the Scoop5 S-IP is accepted by Codec 1 if it is available (not busy with a link), otherwise by Codec 2.
  • Page 65 “Call” button. 4.5.11. Links with IP phones Scoop5 S-IP is compatible with IP phones that use the SIP protocol (many on the market do). The algorithm used in this case is commonly G711, but a few IP phones also accept G722.
  • Page 66 On the Scoop5 S-IP the operating mode stays quite similar to the “normal” mode, with mainly two differences in the multicast mode: ...

  • Page 67: Setting Up A Link Over A Leased Line

    By default, no incoming call from another network interface (Ethernet) is accepted when the unit is set in this LL mode. However, it is possible to allow such incoming calls by changing the “Backup Receive” setting (in the “Misc” tab in the html pages). Scoop5 S-IP - User Manual...

  • Page 68: Management Of The Configuration Profiles

    If you have lost the login password, of course this page cannot be reached… You should in such case apply the backup reset procedure (as described in 3.6.5, Backup reset) and bring the unit back to its default “factory” settings, including a blank password. Scoop5 S-IP - User Manual...

  • Page 69: Technical Characteristics

    The interface normally operates in 100BaseT full-duplex mode, with auto negotiation, but it is possible to force other configurations. The installation and operation of this function is detailed in 3.4, Initial setup of the Ethernet interface. Scoop5 S-IP - User Manual...
  • Page 70 The codec does not transmit a C signal and the I signal has no effect. The codec can also be connected to a V35 interface; a specific adaptation cable is needed in such case. The connection is described in Annex (6.4, V35 interface adaptation). Scoop5 S-IP - User Manual...
  • Page 71 (see page ) to activate the interface and to configure its baud rate (300 to 9600 ODING UNCTIONS bauds). However, the maximum allowed baud rate depends on the audio coding used (see 2.4, Auxiliary functions). Scoop5 S-IP - User Manual...
  • Page 72 > 1500 V The 5V power supply is available from the unit to power a low-consumption device (maximum 300 mA current consumption), e.g. to power the input loops or LED indicators connected to the output loops. Scoop5 S-IP - User Manual...
  • Page 73 > 1500 V The 5V power supply is available from the unit to power a low-consumption device (maximum 300 mA current consumption), e.g. to power the input loops or LED indicators connected to the output loops. Scoop5 S-IP - User Manual...
  • Page 74 [2] The GPO are “open drain”, and must be “pulled up” (to 5 V nominal) for the high level, but an internal pull-up ensures a 5 v voltage when they are inactive, even with no external polarization. Scoop5 S-IP - User Manual...
  • Page 75 [2]: The power consumption may vary in a wide range depending on the input voltage, the installed options, and the operating mode. Connections on the XLR socket: Ground is connected on pin 1, and pin 4 must provide the +12 V voltage. Scoop5 S-IP - User Manual...

  • Page 76: Audio Performance

    When the maximum input and output level is set at another level, both the signal and noise levels are shifted but the SNR remains in the same range. 1 Worst case for all types of algorithms; MPEG performs better than the others Scoop5 S-IP - User Manual...
  • Page 77 The gain difference between channels is less than  0.3 dB over the whole bandwidth, for any sampling frequency. The phase difference between channels is less than  3 degrees over the whole bandwidth, for any sampling frequency. Scoop5 S-IP - User Manual...

  • Page 78: Network Protocols And Ports

    5.3. Network protocols and ports The Scoop5 S-IP implements or complies with the following protocols (non exhaustive list):  Physical and link layers: Ethernet, 100BaseT, 10BaseT  Network/Transport layers (IPv4): TCP/IP, UDP/IP, RTP/IP  Application: HTTP, Telnet, DHCP, STUN, NTP, SYSLOG ...

  • Page 79: Power Supply

    Manager control” option (see above). Scoop5 S-IP can also be controlled by several third-party software tools such as Codec Live, MDC.Net... It is possible to get an additional Ethernet interface that can be used for remote control from a separate sub-network, by connecting on the USB socket a USB/Ethernet adapter, such as the Icy Box IB-AC509.

  • Page 80: Annexes

    Most often, for a normal quality transmission link, mode 1 is sufficient and it consumes little bit rate from the compressed data, so it hardly impacts the audio quality. Although J52 does not apply to leased line connections, this error protection technique is also implemented in the Scoop5 S-IP in leased line mode.

  • Page 81: Overview Of The Sip Protocol

    Scoopy+ Figure 5 – Setting up an SIP session with server(s) 1 Scoopy+ is a portable audio codec from AETA; the description here applies to both Scoopy+ and the Scoop5 S-IP, as they are both SIP compliant and mutually compatible...
  • Page 82 Proxies can help dealing with this issue, but without such servers it may be rather difficult to work around such obstacle. The following chapter provides some recommendations about this. Scoop5 S-IP - User Manual...

  • Page 83: Some Methods To Deal With Nat Routers And Firewalls

    It is just the same on a 3G/3G+ mobile IP access; the terminals (phones or computers) access the Internet via NAT routing.  NAT routing is often included in the firewall features; in fact NAT routing somewhat participates to the protection against direct attacks from the outside. Scoop5 S-IP - User Manual...
  • Page 84 This addressing information is then used by the agent for negotiating and setting up a media session. The STUN server address is programmable in the menu or the html pages of a Scoop5 S-IP or Scoopy+. Besides, there is also in the menu (keypad and display on the front of the unit) an enable/disable (on/off) selection, without having to clear the server address.
  • Page 85 UDP 5004 (RTP port) and 5005 (RTCP port), optionally also 5006 and 5007 (double codec case) 1 Except with symmetric NAT, which is often met for mobile network access 2 If needed you can change these numbers on the Scoop5 S-IP Scoop5 S-IP - User Manual...
  • Page 86 Contact AETA for subscribing SIP accounts. 1 Depending on the access control policy, a server may accept « outgoing » calls to third party domains, or accept « incoming » calls from non registered agents. Scoop5 S-IP - User Manual...
  • Page 87 Reminder: the SIP protocol (always used by AETA codecs) does not impose the use of a SIP server. Codecs can set up point-to-point links using this protocol in the above described conditions. When no SIP registrar is involved, the identifiers are simply the IP addresses of the codecs. Scoop5 S-IP - User Manual...

  • Page 88: V35 Interface Adaptation

    6.4. V35 interface adaptation This annex indicates the proper connections to use when interfacing the Scoop5 S-IP codec to DCE equipment using a V35 interface. In the connection table below, the three leftmost columns show the pin allocation on the 15-pin connector of the codec.

  • Page 89: Index

    URI ..............59, 77 SNR (Signal to Noise Ratio) ........72 Impedance .............. 65 SRT................12 Standby ............. 20, 36 STUN ............46, 74, 80 J52 ................76 Supervision ..........17, 19, 23 Synchronisation ............25 Scoop5 S-IP - User Manual...
  • Page 90 USB ................23 Tech 3326 (N/ACIP) ..........74, 77 Temperature ............75 Weight ..............75 Test loop ..............34 THD, THD+N ............73 X21, X24 ...............9, 66 Unicast ..............6 NOTES Scoop5 S-IP - User Manual...
  • Page 92 92350 L LESSIS OBINSON . +33 1 41 36 12 00 – F +33 1 41 36 12 69 ÉL http://www.aeta-audio.com Specifications subject to change – All rights reserved by AETA AUDIO SYSTEMS 55 000 092 - C January 2017...

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