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A vessel traffic service (VTS) is a marine traffic monitoring system established by harbor or port authorities, similar to air traffic control for aircraft. The International Maritime Organization defines VTS as "a service implemented by a competent authority designed to improve the safety and efficiency of vessel traffic and protect the environment. The service shall have the capability to interact with the traffic and respond to traffic situations developing in the VTS area". In the United States of America (USA), VTSs are established and operated by the United States Coast Guard (USCG) Navigation Center. Some VTSs in the USA operate as partnerships between USCG and private agencies. Typical VTS systems use radar, closed-circuit television (CCTV), VHF radiotelephony and automatic identification system to keep track of vessel movements and provide navigational safety in a limited geographical area.
A method for VHF voice association of ship name suitable for vessel traffic management system
This invention discloses a method for associating ship names with VHF voice signals in a vessel traffic management system. The method includes: Step 1, establishing a pinyin code table and an approximate sound index table; Step 2, dynamic ship name set preprocessing; Step 3, multi-channel speech-to-text conversion; Step 4, multi-size sliding window matching; and Step 5, outputting the best-matching ship name. This invention, combined with the characteristics of a vessel traffic management system, solves the problems of low accuracy and difficulty in ship name association in VHF speech-to-text conversion through dynamic ship name set narrowing of the matching range, multi-model collaborative transcription and hot word optimization, dynamic ship name set preprocessing, and multi-size sliding window matching algorithms. It significantly improves the intelligence level of maritime supervision and features low resource consumption, high real-time performance, and high accuracy.
Owner:CSIC PRIDE (NANJING) ATMOSPHERIC & OCEANIC INFORMATION SYST CO LTD