Czasopismo | ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA | Rocznik 2011 - zeszyt 5

Database and recording system for registration, maintaining and fast searching of emergency telephone calls

nr katalogowy: 59598

Maintenance of telephone calls is a very important task for emergency services like for the Police, Ambulance Service, and Fire Brigades [1]. An important task consists, among others, in a search for calls of same person over a relatively long period of time (of months or years) and large area. Huge number of the recorded calls to be analyzed in such a case hampers or even makes realization of this task impossible not only in real-time (i.e., during the call, which typically lasts about 1.2 minutes only) but also off-line. Furthermore, it is also quite difficult to automatically decide if a present call is related to the already reported case. The described functionalities are very helpful to prevent unnecessary interventions under fake submissions or multi reporting of the same case, which unfortunately occur quite often. In order to offer the described functionalities, we are creating an additional database in parallel to the standard one (that of pure, whole call recordings), which contains concise but unambiguous information about the calls and speakers, and we are preparing tools for efficient and fast data searching. These tools are based on implementation of multilevel signal analysis and on metadata, which are automatically or manually annotated (i.e., by the telephone operator) for the call in real-time and/or during the call post-processing. Some data should be won manually as e.g. annotations of speaker characteristics based on the call transcriptions. Proposed tools enable efficient data search among the calls. It is possible to recall the most similar voices from the database using multilevel speaker analysis starting with the voice features and ending with the linguistic features. For more effective searching we use metadata in a complex but coherent system based on semantic data analysis joint with the numeric data analysis, and correlations among various features. General, initial concept of the database sys[...]

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2011-5

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