Wyniki wyszukiwania - BazTech

1

Badanie jakości transmisji w systemach radiofonii cyfrowej DAB i DAB+

Falkowski-Gilski P.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2018

|

nr 6

383--386, CD

PL

W dobie mediów cyfrowych kluczowym elementem jest dostarczanie treści wysokiej jakości. Wśród systemów radiofonii cyfrowej do najpopularniejszych należą standardy DAB i DAB+ (Digital Audio Broadcasting). Przy konfiguracji multipleksu ważne jest właściwe zarządzanie zasobami w ramach pojedynczego kanału radiowego. W artykule przedstawiono wyniki badań subiektywnych, dotyczących jakości transmisji w systemach DAB i DAB+, przeprowadzonych przy pomocy zaprojektowanego łącza radiowego.

EN

Currently, delivering high quality content to consumers is one of the most challenging tasks. Among numerous broadcasting standards, with different pros and cons, the DAB and DAB+ (Digital Audio Broadcasting) systems are considered as most popular. When configuring a particular multiplex, efficient resource management becomes a crucial factor. In this paper a subjective quality assessment of the DAB and DAB+ broadcasting systems is described, using a radio link designed for this test.

2

Adaptacyjna metoda zarządzania zasobami multipleksu w radiofonii cyfrowej DAB+

Gilski P., Stefański J.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2017

|

nr 6

565--568, CD

PL

W artykule przedstawiono koncepcję adaptacyjnej metody zarządzania zasobami multipleksu w radiofonii cyfrowej DAB+. Dokonano analizy profilu programów radiowych na podstawie treści realizowanych audycji. Omówiono wyniki badań symulacyjnych dla czterech multipleksów o odmiennej konfiguracji i zawartości programów. Przedstawiono koncepcję demonstratora technologicznego, w pełni kompatybilnego ze standardem DAB+.

EN

In this paper we present the concept of an adaptive multiplex resource allocation method in the DAB+ broadcast system. We provide an analysis of profiles of a radio program with respect to transmitted content. We discuss simulation results of four multiplexes, with different configurations and programs. We describe the concept of a technological demonstrator, fully compatible with the DAB+ standard.

3

Subjective and Objective Comparative Study of DAB+ Broadcast System

Gilski P., Stefański J.

Archives of Acoustics

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2017

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Vol. 42, No. 1

3--11

EN

Broadcasting services seek to optimize their use of bandwidth in order to maximize user’s quality of experience. They aim to transmit high-quality digital speech and music signals at the lowest bitrate. They intend to offer the best quality under available conditions. Due to bandwidth limitations, audio quality is in conflict with the number of transmitted radio programs. This paper analyzes whether the quality of real-time digital DAB+ broadcasted radio programs surpasses the quality offered by analog FM radio. We also perform a subjective and objective quality assessment comparative study of the HE-AAC v2 audio codec used in DAB+. The subjective studies were carried out using the MOS test methodology, whereas the objective tests were realized using the ViSQOLAudio metric. These studies were followed by a questionnaire concerning the migration from analog to digital radio domain.

4

DAB vs DAB+ Radio Broadcasting : a Subjective Comparative Study

Gilski P.

Archives of Acoustics

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2017

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Vol. 42, No. 4

715--723

EN

In the age of digital media, delivering high quality content to consumers is one of the most demanding tasks. There exist numerous broadcasting standards, with different pros and cons, and the DAB/DAB+ (Digital Audio Broadcasting) system is one of the most popular among them. From an engineer’s perspective, efficient resource management under limited bandwidth conditions has always been a challenge. In this paper a subjective quality assessment study of the DAB and DAB+ broadcasting system is performer on a representative group of signal samples. It describes the radio link, including a fully functional transmitter designed for the purpose of this test, as well as the receiver side representing a commercially available consumer device, for a truly real-time and end-to-end quality evaluation.

5

Adaptacyjna metoda doboru przepływności przydzielanych programom radiowym nadawanym w standardzie DAB+

Gilski P., Stefański J.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

|

2016

|

nr 6

305--308, CD

PL

W artykule opisano pomiary jakości transmisji rzeczywistych programów radiowych nadawanych w standardzie DAB+. Omówiono badania ankietowe dotyczące przełączenia emisji programów radiowych z techniki analogowej FM na cyfrową DAB+. Dokonano analizy typów audycji prowadzonych w godzinie największej słuchalności pod kątem efektywnego zarządzania ograniczonymi zasobami częstotliwościowymi. Zaproponowano metodę adaptacyjnego doboru przepływności przydzielanych poszczególnym programom radiowym.

EN

In this paper we examine the quality of real-time DAB+ broadcasted radio programs. We discuss a survey concerning the migration from analog FM to digital DAB+ radio domain. We analyze the type of content transmitted over different radio programs during primetime. We propose an adaptive bitrate assignment method for DAB+ broadcasted radio programs.

6

Can the Digital Surpass the Analog: DAB+ Possibilities, Limitations and User Expectations

Gilski P., Stefański J.

International Journal of Electronics and Telecommunications

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2016

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Vol. 62, No. 4

353--361

EN

Radio is by far the most accessible medium. With its mobility and availability, it attracts listeners by its simplicity and friendliness. The present information situation is characterized by the convergence of computers, mobile devices, telecommunication and broadcasting technologies and the divergence of different ways of delivering and storing media. Consumers are overwhelmed by new electronic gadgets appearing every year. They are astonished by new technical innovations that are being designed to ease their life and change their habits. Even the broadcasting sector itself is facing significant changes, especially a growing competition between the private and public sector. This article reviews the current status of analog and digital broadcasting technologies. It analyzes a case study of user expectations related with today’s digital media, particularly radio transmission. We discuss the principal possibilities, limitations and user expectations related with digital audio broadcasting, as well as the economic, technological, regulatory and frequency management factors.