Gmdss decoder


5. Set the frequency in GMDSS to the audio center frequency of your radio in RTTY mode, usually around 2200 Hz. The EPIRB Tester is designed to decode and display the encoded message from a 406 MHz Cospas-Sarsat Emergency Position Indicating Radio Transmitter. R. Check your radio's manual to be sure. I set up seven instances of MultiPSK to receive, demoulate and decode seven HF GMDSS channels in parallel. It can decode GMDSS DSC (HF and VHF) messages. de email: info@busse-yachtshop. Global Maritime Distress and Safety System's Digital Selective Calling (GMDSS-DSC) is a maritime communication protocol intended to initiate ship-to-ship, ship-to-shore and shore-to-ship radiotelephone and MF/HF radiotelex calls. This system underwent a transitional phase from 1 February 1992 until 1st February 1999 from which date the GMDSS requirements became mandatory within Chapter V of the Convention for Safety of Life at Sea (SOLAS). 01 . SeaTTY — Version history | Downloads and Registration. This is de-modulated using a simple PLL (phased locked loop). 3 HF  Может декодировать сообщения GMDSS DSC (КВ и УКВ). 80 beta is published - with GMDSS DSC decoder now. It contains an SSB radiotelephone, DSC terminal, NBDP  BNC socket. 5 6312. GMDSS Decoder. GMDSS Marine Radio Decoder FMD55P FREQU MODE FILTER ATT 12 3,EXT DECODE DISPLAY PRINT 2182 45 6 F1 READ WRITE RECALL STORE 78 9 F2FREQU < NO LOCK YES > STDBY TUNE CLEAR 0 ENTER F3 GMDSS MARINE RADIO DECODER FMD 55 OFF ATT. Morse code is a type of code that is used to send telegraphic information using rhythm. 2. Tests and 7. SeaTTY 1. DSC Decoder · GMDSS Decoder for IPhone / Ipad Yet Another DSC Decoder ( YADD), in the list of links to  GMDSS Decoder. Merod, NUM-13, Skyfax, Twinplex, VISEL. Distress of KENTA GMDSS products are perfectly in line with the DSC encoder / decoders as an option) and. Navico Axis 30 Gmdss Compliant Emergency Handheld Vhf Pair Marine Radio. This mode crashes the tool and has been reported to activate malware but I've only noted the tool crash with no other effects on the pc. 1 Inmarsat-B/Fleet77 SESs 39 7. Power supply requirements GMDSS equipment is required to be powered from three sources of supply: NAVTEX (NAVigational TEleX), sometimes styled Navtex or NavTex, is an international automated medium frequency direct-printing service for delivery of navigational and meteorological warnings and forecasts, as well as urgent maritime safety information (MSI) to ships. Inmarsat C comprises of a small omnidirectional antenna, compact transceiver (transmitter and receiver), messaging unit and, if GMDSS-compliant or with a distress function, a GMDSS TEST Equipment. IV/2 — GMDSS Radio Operator or GMDSS At-Sea Maintainer. You have so much more to explore! Select any active LES channel and start receiving messages. Boat Marine - $840. GMDSS showing vessels and details I would say that 99% of vessels out there do not send their position details due to many reasons, security being the main one. Unfortunately, this has proven to be one of the underlying causes of the present ex tremely high false alerting rate on some GMDSS systems. 40. 1 MF/HF transceivers 49 [tabs] About The GMDSS is an internationally recognized distress and radio communication safety system for ships replacing the previous ship to ship safety system, which relied on a manual Morse code system on 500 kHz and voice radiotelephony on Channel 16 and 2182 kHz. Receiver for a Global Navigation Satellite system or a Terrestrial Radionavigation System (GPS) Make/model: b. I would The DSC Decoder II is an integration of the standard TransOceana DSC decoder and the TransOceana GMDSS operator console. Station ID's of RTTY and NAVTEX messages are included in message filenames and are shown in the message tree now. General Information. 5 12577. GMDSS DSC (HF and VHF) messages decoding was made. The only decoder featured in the tool that crashed in testing is the olivia fsk mode. 2 Inmarsat-C SESs 41 7. AUM13, DGPS-SC104, EPIRB, G-TOR, GMDSS HF, GW-Dataplex, HF Datalink, IRA ARQ,. The “Setup” menu was rewritten. de The SMARTFIND GMDSS NAVTEX features a powerful tri-channel receiver, which allows the unit to simultaneously monitor the 518KHz English language, 490KHZ national language and the 4209. The types of Inmarsat ship earth station terminals recognized by the GMDSS are: Inmarsat C and F77. GMDSS send messages on the HF and VHF bands using Digital Selective Calling . RadioRAft decodes RTTY Baudot, NAVTEX, ACARS, GMDSS-DSC, POCSAG, PACTOR, PACKET, SITOR, numerous ARQ and FEC modes, CW Morse, RUM-FEC, ASCII, CIS-11, HNG-FEC, AUTOSPEC, SPREAD. 10. A typical GMDSS ship-station includes a message terminal with keyboard, monitor and printer. The SMARTFIND NAVTEX will receive on all 3 frequencies The BEACON Tester is designed to decode and display the encoded message from a 406 MHz Cospas-Sarsat Emergency Position Indicating Radio Transmitter. . 493. It is defined by the ITU specification R-REC-M. 20 Sep 2018 Online you will find a number of paid and free decoders, YaDD (Yet another DSC Decoder) is a great free decoder available for download. The data is sometimes described as HF ACARS, and uses this protocol to exchange packets of data with aircrafts and ground stations over HF. V1. 1371-1 AIS 9600bd MDC-1200 MODAT Tonal System NATEL Tonal System POCSAG Paging AX. a Nils) has sent in a link to a 16 page pdf file showing a comprehensive tour on the FUNcube Dongle Pro+’s capabilities on the HF spectrum. 0 kHz Many GMDSS ships opt for the latter option (1 Inmarsat C and one MF/HF DSC system), on cost grounds. Australian Global Maritime Distress and Safety System (GMDSS) Handbook 2018 iii 7 GMDSS Inmarsat equipment 39 7. Inmarsat C comprises of a small omnidirectional antenna, compact transceiver (transmitter and receiver), messaging unit and, if GMDSS-compliant or with a distress function, a a. Tune your radio to one of the GMDSS-DSC frequencies: 2187. Online Element 9 - GMDSS Radio Maintenance Practices and Procedures Image   can offer GMDSS inspections for both new installations and annual audits for the radio and decoding the EPIRB identity number and other information from the  18 Jul 2016 The GMDSS is a set of procedures, equipment, and unit has been set up on a computer with open source software in order to decode the. Navtex is broadcasted at 518 kHz, and is modulated using FSK (frequency-shift keying). Digital Selective Calling (DSC) is an MF/HF radio service in the Maritime Mobile Service. 5 4207. GMDSS is a system of ship-coast and coast-ship digital communications on six main HF channels. In the past if a 3rd party application wanted to capture DSC messages and report them on a web page or a chart they would need to purchase both a DSC decoder and GMDSS operator console software components. Joined Sep 2, 2012 Messages 20 Navtex Receiver Fmd15 Gmdss Marine Radio Decoder. FEC mode. GMDSS International DSC frequencies. Welcome · Revisions · Recommended WAVECOM Products and  GMDSS Distress Urgency and Safety Communications Procedures. Thread starter Reece; Start date Nov 11, 2012; Status Not open for further replies. NAVTEX decoder is an imaginitively named NAVTEX software decoder for NAVTEX transmissions. 76. The DSC Decoder II is an integration of the standard TransOceana DSC decoder and the TransOceana GMDSS operator console. W- ODE is the new standard decoder soft-ware for all Wavecom products. NAVTEX Decoder v. Futronic first generation is now succeded by the Futronic MKII GMDSS tester MOB devices on both AIS channels simultaneously; Decoding new AIS Class A  However, if such ships/vessels are going to install GMDSS radio equipment on A single DSC decoder may be used to serve both the DSC distress and safety  GMDSS communication equipment is operated to send and receive various types of keeping records of radio communication; transmitting and decoding the  AIS Tester; BEACON Tester; Beacon Tester Mini Wi-Fi; GMDSS Tester MRTS-7M emergency radio beacon rapid signals reception, decoding and positioning. 5, 6312, 8414. The GMDSS/DSC is a maritime safety system. 00. GMDSS-DSC 100 2187. 7. GMDSS ships GMDSS Information- What You Need to Know. Delivered anywhere in UK ARINC 635 is an HF data protocol defined in a document of the same name. 825 VTS Selcall 23 Nov 1995 for the Global Maritime Distress and Safety System (GMDSS), which require the DSC equipment should be capable of decoding the received  4 Jan 2013 Date and time of decoding: 03/01/2013 23:12:34 <Selective call to a particular individual station> Called MMSI station address: 002320004 . Contents; Index; Search. All you need is a shortwave radio and a computer to begin decoding signals yourself. Display frequency (RX) set to nominal minus 100Hz, mode CW. 75. Some have more traffic than others, try them all out. 2. FEC100,  It monitors real-time 406MHz distress singals with decoding and positioning. 0. 1. Download navtex decoder 2. Oct 01, 2003 · SeaTTY 1. GENERAL CONCEPT OF GMDSSGENERAL CONCEPT OF GMDSS Global Maritime Distress and Safety System (GMDSS) has been developed by the maritime nations in the International Maritime Organization (IMO) and is the result of their adoption of amendments made in 1988 to the 1974 International Convention on the Safety of Life at Sea (SOLAS). Just set it near a radio (or for better quality decoding, connect a cable from the radio's audio output jack to the microphone jack), SeaTTY v2. Global Maritime Distress and Safety System . General By decoding and using the information available on the NCS common   calling in the Global Maritime Distress and Safety System (GMDSS); d) 1. 60. navtex live,online frequency 518 khz. b. YADD and several other software decoders can be downloaded from the NDB List Info site the best source of hands-on information for topics involving NDBs, Navtex, DGPS, DSC DXing and more. EXIT ENTER UP SETUP DOWN STORE www. I currently have the program running continuously and uploading NAVTEX messages to an online database. General Description. 3 Inmarsat EGC receivers 43 8 Long Range Identification and Tracking (LRIT) 47 8. Decoding: NAVTEX. Sorcerer Decoder Download GMDSS M. The pro decoder enables you receive traffic from LES channels. 0 and 518. It is an automated ship-to-ship, shore-to-ship and ship-to-shore communications system covering distress alerting and relay, the provision of maritime safety information (MSI) , and routine communications. k. 5KHz Compare this product Don’t compare this product Marine - Here we have several modes to consider - GMDSS/DSC, NAVTEX, FAX Weather charts and even some PACTOR (although it should be noted that most maritime PACTOR uses compression and encryption schemes that can't be easily read). There are two main  WAVECOM Decoder Online Help 10. Distress, urgency and safety communications procedures in the GMDSS. 25. 2 the receiver decoder should provide maximum utilization of the received signal,  GMDSS-Display reading decoded data streams from seven MultiPSK's instances In the past, I mostly used the excellent and free YaDD software to decode all  KVHF-4010-50: 50W VHF Transceiver for GMDSS Coast Station (DSC decoder included, VoIP decoder included and NAVTEX decoder included). 1730) sector: 135 -165 (brg from buoy b1) range: 15 nm days: 18 and 19 jun 2020 period: from 0600 utc to 1500 utc shipping The NAVTEX system is designed to be used in GMDSS Sea Area A2, and is utilised mainly by those countries with relatively small areas of coastline and/or sea areas to cover. Find out more here. 6. 5 kHz. MID Allocated to; 453: Macao (Special Administrative Region of China) 455: Maldives (Republic of) 457: Mongolia: 459: Nepal (Federal Democratic Republic of) Inmarsat C is a two-way store and forward communication system that transmits messages in data packets in ship-to-shore, shore-to-ship and ship-to-ship direction. Aug 11, 2016 · Navtex was developed to provide low cost, simple and automated maritime safety information to the ships in coastal waters. 28 Feb 2018 DSC, GMDSS, maritime, radio VHF DSC decoder . Checked for compliance with IMO performance standards. 83. Participating DSC stations are identified by MMSI numbers (Maritime Mobile Service Identity), consisting of 9 figures for ships and '00' + 7 figures for Coast Stations. 9 Reaction to VTS and AIS channel management DSC transmissions  23 Jan 2020 II/5 — Able Seafarer Deck. Below: A table with a list of the currently available channels as sent by the satellite, (live example from AOR-E below). NAVTEX Decoder. JT65-HF Amateur Radio software for reception/transmission of JT65A protocol with an emphasis upon its usage in the High Frequency Amateur Bands. The SDRplay RSP is a $149 USD software defined radio with a tuning range of 0. 2020-06-18 05:58:03 (lv) area: r: receiver nr. RadioRaft is an automatic decoder of numerous modes of radio data transmission on shortwaves, VHF or UHF. On the FUNcube Dongle blog/store amateur radio enthusiast DK80K (a. Navico Axis - $64. Morse code uses dots and dashes to show the alphabet letters, numbers, punctuation and special characters of a given message. According to GMDSS all equipment needs to be type approved. This resulted in about 5000 messages/24 h a an average location in Germany. : 2 (nl) zczc ra16 180250 utc jun 20 la maddalena radio coastal warning nr. Decode GMDSS-DSC Transmissions With Your iPhone and iPad Do you want to be able to receive GMDSS-DSC marine safety transmissions? GMDSS lets you view GMDSS-DSC marine weather transmissions on your iPhone, iPod Touch, or iPad. Page 1/8 Ver. Navtex is part of GMDSS equipments which is required to be fitted onboard every ship as per SOLAS Chapter IV Reg 7. c. Sitor / 100 Baud (GMDSS-MSI). None additional hardware is required - your need only receiver and $49. The basis on a fundamental concept, the main functions and the international requirements the Global Maritime Distress and Safety System (GMDSS) have been presented. References  continues to deliver GMDSS (Global Maritime. Navtex. 8 Verification of correct decoding of various types of DSC calls. RTTY / 50 Baud EN 60945 GMDSS standard MSI (Maritime Safety Information) Decoder. 5, 4207. Perseus RX signal fed via Virtual cable to Multipsk. The time code presents UTC information in serial fashion at a rate of 1 pulse per second. The tester can be connected directly to the EPIRB or monitored "over the air" using the supplied whip antenna. This repository contains an IPython notebook to receive such messages. 5 kHz, using RTTY mode if your radio has that mode. SR(GMDSS)check . Welcome to the ndblist. Products: SAILOR 6000A GMDSS A3 COMREX ACCESS Rack Sterio BRIC IP Codec. This system has been adopted for worldwide use and replaces the Morse code and voice distress transmissions used in past years. Xpdf может декодировать LZW и читать  priority alerting within the GMDSS. Software also can automatically save NOAA Weather Radio SAME voice messages (NWR SAME) and them digital headers. Coast Guard): Position 46°10' N and 123°49' W: Messages prepared by USA: CAUTION - This page is provided as a service to mariners and may not reflect an accurate listing of marine weather products being broadcast which is subject to revision. Under the provision GMDSS ships. The start of the Global Maritime Distress and Safety System (GMDSS) in February 1992 has made it Encoders and decoders: binary/decimal and Johnson. Decode a message at 16 code groups per minute. 0 8414. The cutting-edge software is compatible with all operation systems. 5, 12577 or 16804. 1 for MF/HF DSC decoder shall be a signal at the nominal receiver frequency with a  You can now find the DSC/GMDSS coverage in its own brand new specialist DSC DECODER - DECODING SOFTWARE: - This comprehensive decoding  PASSENGER / CARGO SHIP SAFETY RADIO EQUIPMENT (GMDSS). The information carried by the time code includes the current minute, hour, and day of year. Nov 11, 2012 · Maritime decoding, NAVTEX, GMDSS etc. It is part of the GMDSS (Global Maritime Distress and Safety System). Navtex decoder. There are two main operational modes: 100 baud FSK for HF/MF (offset 170 Hz) and 1200 baud FSK (offset 800 Hz) for VHF. and our other sister groups, the NAVTEX DX List which specialises in the NAVTEX mode, and the brand new DSC LIST, which is The Fastnet Marine Decoder contains the following functions: a)Receiver a high quality receiver with the following important features: Range : 8 free programmable channels : from 100 kHz to 11,8 MHz Modes : FSK and CW Memory stores : 8 frequencies with modes b) NAVTEX receiver and decoder Frequencies : 490. CHECK LIST FOR INITIAL/PERIODICAL/ RENEWAL SURVEY OF PASSENGER / CARGO SHIP SAFETY RADIO EQUIPMENT (GMDSS) Under the provision of the SOLAS 1974 as amended and the Rules for Radio Installations for . The SMARTFIND NAVTEX can be installed with either the bulkhead-mounting bracket or the flush panel mounting kit provided with the product. The tester will decode any 406 MHz aviation protocol for EPIRB's. analyze, record, decode and process radio data commu-nications throughout the entire radio spectrum from ELF to SHF. Over on YouTube user Mile Kokotov has uploaded a video showing him receiving a WPX CQ CW (morse code) contest on his SDRplay RSP. 25 Packet VHF 9600bd Aug 08, 2017 · YADD stands for "Yet Another DSC Decoder" and is an offshoot of Dirk's equally popular and effective "YAND", a free Navtex decoder. The GMDSS is an automated ship to shore system using satellites and digital selective calling technology. 35. Delta-II rocket, 66. HF Software Decoders From The RadioReference Wiki Without a doubt, decoding digital signals at the software level has grown in recent years, easily supplanting the hardware decoders, since software packages can be updated and are generally free of hardware constraints (there are a few that need a dongle, though). POL-ARQ GMDSS Multi Tester MRTS-7M is the first hand-held Multi Tester enabling the testing of all GMDSS equipment: AIS Stations, EPIRBs, VHF and MF/HF Radios with DSC, AIS-SART and NAVTEX. (Yet another DSC Decoder) is a great free decoder available for download. UK: around 140 and 155 Mhz. 00 Jun 17, 2012 · How to decode DSC signal with MultiPSK. The Global maritime distress and safety system compromises of safety procedures, equipment and a set of communication protocols which makes it easier to rescue boats, ships and other air crafts in distress. Reece Member. 31 beta is published. HFDL, also known as HF High Frequency (3-30 MHz)-ACARS, ARINC 753, ARINC 635, and HF High Frequency (3-30 MHz) DATALINK,is a data link that aircraft use to communicate short messages over long distances using HF High Frequency (3-30 MHz) signals. 825 VTS Selcall M. S. Inmarsat F77, an updated version of the now redundant  response to, GMDSS HF/MF maritime communications including both voice ( single decode HF/DSC or computer equipment along with approved software to  Maritime Distress Safety System (GMDSS) on Channel 70 (156,525 MHz) [3]; speech codec optimization for typical maritime communications;. Distress Decoding, 108. The RC-1800F/1800T radio rack console conforms to the IMO regulations for GMDSS radio equipment. GMDSS DSC (Digital selective-calling system) HF and VHF messages decoding was made. Automatic generation of test reports for all the range of tested equipment. An android app enables the user to search the stored messages or to. However, GMDSS Display has a function whereby pressing the ships code opens a Marine Traffic. ▫ Fulfills DSC The test will check the ability to encode/decode DSC signalling on RF level. Multimedia tools downloads - NAVTEX Decoder by Frisnit and many more programs are available for instant and free download. A program to receive weather reports, navigational warnings and weather charts transmitted in RTTY, NAVTEX, PACTOR-1 FEC and HF-FAX (WEFAX) modes on longwave and shortwave bands. Compliant with GMDSS in sea areas A2, A3 and A4 (Wheelmark). 2005. Welcome to GNSS-SDR! This program is a software-defined receiver which is able to process (that is, to perform detection, synchronization, demodulation and decoding of the navigation message, computation of observables and, finally, computation of position fixes) the following Global Navigation Satellite System's signals: Oct 14, 2018 · Digital selective calling ( #DSC ) on MF, HF and VHF maritime radios is a part of the Global Maritime Distress and Safety System ( #GMDSS ). Parallel reception & decoding of six GMDSS channels at once. This filter allow to select messages which should be automatically Astoria [W] (U. GMDSS (Global Maritime Distress and Safety System) is an automated DSC (digital signal calling) marine distress teletype mode. 5 khz. In decoding software select mode GMDSS and On the FUNcube Dongle blog/store amateur radio enthusiast DK80K (a. Information on the ship's position is continuously and automatically provided to all relevant GMDSS equipment. more info on the specs of this please look on the web site. Choices here include MultiPSK, SeaTTY, PC-NAVTEX, Frisnet, DSC Decoder and the Java-driven JNX. A program to receive weather reports, navigational warnings and weather charts transmitted in RTTY, NAVTEX and HF-FAX (WEFAX) modes on longwave and shortwave bands. FCC ID application submitted by Fastnet Radio of America LLC for GMDSS Marine Radio Decoder FMD 55 p for FCC ID QMGFMD55. 76 Station ID's of RTTY and NAVTEX messages are included in message filenames and are shown in the message tree now. There are other freely available tools that decode olivia, wich is an infrequently found amateur radio mode. Used for land and or airborne search and rescue forces to effect immidiate rescue. Busse-Yachtshop. 1. What is the source of Navtex messages Inmarsat's broad range of satellite communication services can help satisfy your communications requirements with a click of a button. 0 16804. RadioRaft, official UK site. Inmarsat C is a two-way store and forward communication system that transmits messages in data packets in ship-to-shore, shore-to-ship and ship-to-ship direction. Major areas of NAVTEX coverage include the Mediterranean Sea, the North Sea, coastal areas around Japan and areas around the North American continent. The SMARTFIND NAVTEX contains 3 receiver channels, tuned to 490 kHz, 518 kHz and 4209. GMDSS-Display reading decoded data streams from seven MultiPSK’s instances in parallel, presenting all information neatly in one database. Station ID filter was made. 20. 1 windows for free. WAVE OM® W-CODE The program can decode fraction-of-a-second signals reflected from ionized meteor trails and steady signals 10 dB below the audible threshold. 5 GMDSS-DSC 1200 156,525 (Ch. Navtex (Navigational Telex) is a way to broadcast (weather) information to ships. On this page you will find links and resources for all the modes covered by the DGPS LIST which covers DGPS DXing, Time Signal Stations monitoring, Weather FAX broadcasts and other similar Navigation modes such as LORAN etc. • realtime  Groups Per Minute. 23 is published (RTTY/NAVTEX/HF-FAX decoder) Reply to Thread. 1 – 2000 MHz, 8 MHz maximum bandwidth and 12-bit ADC. info Datamodes Section. Want to display GMDSS (Global Marine Distress and Safety System) transissions, without using a bulky computer? With this app, you can decode GMDSS-DSC (Digital Selective Calling) transmissions. DSC is primarily intended to initiate ship-to-ship Hi - MultiPSK has a fine decoder for GMDSS aboard, and may be opened in many instances. com webpage showing not only the vessels details and pictures but also its current position WWV and WWVH continuously broadcast a binary coded decimal (BCD) time code on a 100-Hz subcarrier. Jan 30, 2020 · GMDSS offers the greatest advancement in maritime safety since the enactment of regulations following the Titanic disaster in 1912. VI/1 — Basic Training (formerly called “Basic Safety  A3 GMDSS 500W, 2 x mini-C - External Cabling Overview, DWG. There are great many other applications of this revolutionary combination to which I will come back later. The GMDSS is The Global Maritime Distress and Safety System (GMDSS) is an internationally agreed-upon set of safety procedures, types of equipment, and communication protocols used to increase safety and make it easier to rescue distressed ships, boats and aircraft. 70) POCSAG (VHF) POCSAG 1200 DFSK France and Germany: many channels from 465,970 to 466,250, spacing: 12. Further a remote alarm for distress transmissions and an Inmarsat-C transceiver. 374/20 jun 17 ligurian sea - la spezia - sectorial area centered in : psn: buoy b1 (031 - 1260 mt-green light nr. NAVTEX was incorporated into the new regulations for the system known as the Global Maritime Distress and Safety System (GMDSS). Approved Frequencies, User Manuals, Photos, and Wireless Reports. Other nice gadgets that may connected are navigators as the MK9 and MK10 for GPS, DGPS, Decca and Loran readout. When messages are sent by Morse code, dots are short beeps or clicks or flashes, and dashes are longer ones. 26 Jul 2013 Whie searching for a decoder for a particular mode (that is only commercially available so it seems) I came GMDSS M. SeaTTY 2. 1 LRIT conformance testing 47 9 GMDSS MF, HF and VHF equipment 49 9. The GMDSS therefore includes a provision whereby each government that chooses to sign the SOLAS Convention (called a Contracting Government) “… undertakes to make available, as it deems practical and necessary either individually or in co-operation with other Contracting Governments, appropriate shore-based facilities for space and Jul 13, 2019 · Demodulated audio is guided via VAC1 … VAC6 to six different instances of the free YAND GMDSS decoder – see screenshot at the bottom. 16. 2 EGC receiver/decoder. gmdss decoder

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