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Audio Codecs Audio Codecs [ AoIP | Leased Line | E1 ] Release date: July 2019 All rights reserved. Permission to reprint or electronically reproduce any document or graphic in whole or in part for any reason is prohibited unless prior written consent is obtained from AVT Audio Video Technolo- gies GmbH. This catalogue has been put together with the utmost digilence. However, no guar- antee for correctness can be given. AVT Audio Video Technologies GmbH cannot be held responsible for any misleading or incorrect information provided throughout this catalogue. AVT Audio Video Technologies GmbH re- serves the right to change specifications at any time without notice. CONTENT General 5 Features & Symbols 6 Overview 8 ISDN + VoIP ● MAGIC D7 XIP & MAGIC DC7 XIP RM Audio Codecs 10 ○ Application: Audio contribution 12 ISDN + AoIP ● MAGIC AC1 XIP & MAGIC AC1 XIP RM Audio Codecs 14 ○ Application: Audio contribution 16 E1 + AoIP ● MAGIC ACip3 & MAGIC ACip3 2M Audio Codecs 18 ○ Application: Audio contribution 20 ○ Application: AoIP distribution 22 ● MAGIC ACip3 (2M) ModNet System 24 ○ Application: Studio-Transmitter-Links 26 Audio Codec Integration ● MAGIC THipPro ACconnect 28 System Manager Upgrade 30 General Audio Codecs are needed for high-quality bitrate, the desired quality and the accept- Audio transmissions over different networks able delay. The EBU names the following Au- like IP, ISDN, 2-Mbit/s (E1) and X.21. Over IP dio algorithms as mandatory to comply with and ISDN, both Leased Line connections as the AoIP standard. G.711, G.722, ISO/MPEG well as temporary dial-up connections can Layer 2 and PCM (for stationary Audio Co- be used. decs). Furthermore, MPEG4 AAC-LC, MPEG4 AAC-LD and apt-X are recommended as Audio Codecs are required for a variety of further algorithms. applications such as e.g. reporting, studio programme contribution and distribution as For AoIP dial-up connections a SIP Server can well as Studio-Transmitter-Links. be used. The Audio Codec registers at the SIP Server with a SIP account and a pass- For installations in OB vans and reporting ap- word. The SIP account corresponds to the plications, it is often required to have com- telephone number under which the Audio pact and mobile systems. Codec can be reached. If no SIP Server is used, the Audio Codec can be called only Especially for setups which are running 24/7, via its IP address. In Germany, the public the systems need to be highly reliable. Very broadcasters have installed one big SIP Serv- often it is required to have an automatic er at the ARD Sternpunkt in Frankfurt where backup function for these systems. all users can register to communicate with each other. Currently, users can only con- Whereas ISDN and 2-Mbit/s were the main nect with each other if they are registered at technologies used in the past, nowadays the same SIP Server since so far there are no AoIP is the transmission standard. The Europe- gateways which connect one SIP Server with an Broadcasting Union has defined a stand- another. For this reason, it is a great benefit if ard for AoIP dial-up connections already in an IP Audio Codec can register at several SIP 2007. All important Audio Codec manufac- Servers at the same time. turers are supporting this standard (EBU Tech 3326) which ensures interoperability between Audio Codecs are either controlled via the Audio Codecs from different manufactur- front panel or – if the operator is located not ers. This is a great benefit compared to ISDN near the system – via a Windows PC Software where no real standard has been created. using an IP connection. At some workplaces it is also required to control more than one Although it is planned in various countries system. that ISDN will be switched off in the future, some broadcasters are still using ISDN in par- The latest addition to the optional features is allel to IP or as backup. the AES67 Software Upgrade which enables the system to route additional Audio chan- Depending on the application different cod- nels over IP using the AES67 protocol. ing algorithms are used. The selection of the coding algorithm depends on the available 5 Features & Symbols In this product catalogue we will use some Option symbols for the systems’ features and their An orange symbol shows that the availability. Below you will find a description feature is optionally available (associated of all features. with costs). incl. N/A A red symbol shows that the A light grey symbol shows that feature is available in the standard delivery the feature is not supported by the product version for the product described. described. IP IP interface(s) DHD DHD SetLogic The system can be connected to IP lines. The DHD SetLogic commands can be used to communicate with DHD mixing consoles or routers to easily exchange control and signalling commands over IP. ISDN ISDN interface The system can be connected to ISDN lines (BRI S0). Ember+ Ember+ The Ember+ protocol allows the control of a LAWO or DHD mixing console or any other X.21 X.21 interface Ember+ compatible system. The system can be connected to X.21 lines. 2-Codecs 2-Codecs Upgrade E1 E1 interface The system can be upgraded to transmit two Stereo signals in parallel. The system is equipped with an E1 interface for the classic Audio contribution applica- tion via 2-Mbit/s network. SD Card SD card Secure An SD card interface is available (SD card is Streaming Secure Streaming not included). For IP Leased Line connections a connec- tion can be established via one or (with MAGIC ACip3) also two IP links, optionally Backup Backup with different delays, whereas packets are transmitted in parallel to ensure a highly reli- A backup functionality can be configured. able connection. AES67 AES67 GPIO GPIO The AES67 upgrade allows the use of 4 x Programmable TTL interfaces and Relay (or with 2-Codecs Upgrade 6 x) additional contacts are available for external control audio channels over IP via AES67, the low- or signalling. est common denominator of several similar technologies e.g. AES67-compatible Dante and Ravenna devices. 6 Control via keypad Layer 3 Layer 3 In addition to a PC, an external keypad can The system supports the ISO/MPEG Layer 3 be connected. coding algorithm. AAC-LD Control via PC software AAC-LD The system can be operated via a Windows The system supports the AAC-LD coding PC software using a tablet or PC connected algorithm. via LAN to the Audio Codec. Via the soft- ware, multiple codecs can be controlled. AAC-ELD AAC-ELD The system supports the AAC-ELD coding SNMP SNMP algorithm. Support of the SNMP protocol V1 and V2c to integrate a system into a network manage- ment system. AAC-LC AAC-LC The system supports the AAC-LC coding algorithm. redundant Redundant Power Supply As backup of the integrated power supply a HE-AAC redundant external 12 V power supply can V1 HE-AAC V1 be connected. The system supports the HE-AAC V1 coding algorithm. n x LAN n x LAN HE-AAC All Audio Codecs provide at least one LAN V2 HE-AAC V2 interface. Additional LAN interfaces are available as an option/by default. The system supports the HE-AAC V2 coding algorithm. QoS Quality of Service Opus Opus Quality of Service parameters can be selected to give different priorities to the The system supports the Opus coding algo- Audio and data streams in your network. rithm. Data Standard RS232 Data RS232 apt-X Standard apt-X Transparent data transmission via RS232 for The system supports the Standard apt-X e.g. RDS. coding algorithm. Data Enhanced RS485 Data RS485 apt-X Enhanced apt-X Transparent data transmission via RS485 for The system supports the Enhanced apt-X 16 e.g. RDS. Bit (MAGIC AC1 XIP) or even 24 Bit (MAGIC ACip3) coding algorithm. G.711 G.722 G.711 & G.722 PCM The system supports the G.711 (3.1 kHz) and PCM the G.722 (7 kHz) coding algorithms. The system supports PCM 16/20/24 Bit un- compressed Audio coding. Layer 2 Layer 2 The system supports the ISO/MPEG Layer 2 coding algorithm. 7 MAGIC DC7 XIP MAGIC DC7 XIP RM MAGIC AC1 XIP MAGIC AC1 XIP RM MAGIC ACip3 MAGIC ACip3 2M Feature 1 x ISDN S0 BRI 1 x ISDN S0 BRI 1 x ISDN S0 BRI 1 x ISDN S0 BRI 3 x LAN 3 x LAN (2 B channels) (2 B channels) (2 B channels) (2 B channels) 1 x E1 Line interfaces X.21 X.21 X.21 X.21 LAN LAN (optional 2 x LAN) LAN LAN (optional 2 x LAN) 2 x Analogue 2 x Analogue 2 x Analogue 2 x Analogue 1 x Analogue 1 x Analogue Digital AES3 Digital AES3 Digital AES3 Digital AES3 2 x Digital AES3 2 x Digital AES3 Audio interfaces Headset/ Headset/ Headset/ Headset/ OR: 2 x Analogue OR: 2 x Analogue Microphone Microphone Microphone Microphone Headphone Headphone - - - - 4/6 4/6 AES67 channels (optional) (optional) G.711 G.711 G.711 G.711 G.711 G.711 G.722 G.722 G.722 G.722 G.722 G.722 PCM 16/20/24 PCM 16/20/24 PCM 16/20/24 PCM 16/20/24 PCM 16/20/24 PCM 16/20/24 MPEG Layer 2 MPEG Layer 2 MPEG Layer 2 MPEG Layer 2 MPEG Layer 3 MPEG Layer 3 MPEG Layer 3 MPEG Layer 3 Standard apt-X Standard apt-X Enhanced apt-X (24 Bit) Enhanced apt-X (24 Bit) Coding algorithms Enhanced apt-X (16 Bit) Enhanced apt-X (16 Bit) AAC-LD AAC-LD AAC-LD AAC-LD AAC-ELD AAC-ELD AAC-LC AAC-LC HE-AAC V1 HE-AAC V1 HE-AAC V2 HE-AAC V2 Opus Opus 2-Codecs-Upgrade - - - - yes yes 64 – 2304-kbit/s 64 – 2304-kbit/s 32 – 2304-kbit/s 32 – 2304-kbit/s 8 – 2304 kbit/s 8 – 2304 kbit/s Data rates (depends on Codec) (depends on Codec) (depends on Codec) (depends on Codec) (depends on Codec) (depends on Codec) 8, 16, 24, 32, 48-kHz 8, 16, 24, 32, 48-kHz 8, 16, 24, 32, 48-kHz 8, 16, 24, 32, 48-kHz 8, 16, 24, 32, 48-kHz 8, 16, 24, 32, 48-kHz Sampling frequencies (depends on Codec) (depends
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