Digital Audio Broadcasting

• Autorzy: van Katjing Jan

Identyfikatory

DOI

10.34808/tq2021/25.3/c

• Języki publikacji: EN

Abstrakty

EN

Processing digital radio - either on the transmitter or the receiver side - requires a significant amount of digital processing. A receiver for digital radio usually consists of two parts, a ”hardware” part, handling the conversion from an analog antenna signal to a stream samples, and a ”software part”, a decoder, decoding the samples and generating audio, text, images and video. In this paper some aspects of the design and implementation of Qt-DAB, a software decoder for Digital Audio Broadcasting (DAB and DAB+), is discussed. The Qt-DAB decoder runs on a variety of hardware platforms, hardware as small as creditcard sized computers as the Raspberry PI 2, and home computers. In the design performance and flexibility were key. The design is such that it is easy to interface to different hardware SDR devices and easy to add new features. While the core of the Qt-DAB software is formed by the signal processing part, interpreting the incoming sample stream and generating audio, text and images, by far the largest part of the software is handling user interaction and user comfort. Qt-DAB provides a large amount of options, options to select a device, to inspect the signal, to store signals, and options to set the configuration. All in all, it shows that about three quarters of the amount of code is involved is the non-signal processing part.

Słowa kluczowe

EN

DAB; C++; software defined radio; DAB+; Qt

PL

DAB; C++; radio programowane; DAB+; Qt

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 2021
• Tom: Vol. 25, No 3
• Strony: 315--328
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

van Katjing Jan

• Lazy Chair Computing, F. W. van Stoetwegensingel 9, 2642 BX Pijnacker, The Netherlands

Bibliografia

• [1] Radio Broadcasting Systems; Digital Audio Broadcasting (DAB) to mobile, portable and fixed receivers, ETSI EN 300 401
• [2] Digital Radio Mondiale (DRM); System Specification, ETSI ES 201 980
• [3] Katwijk van J The Qt-DAB decoder, URL: https://github.com/JvanKatwijk/qt-dab
• [4] Orthogonal frequency-division multiplexing, URL: https://en.wikipedia.org/wiki/ Orthogonal frequency-division multiplexing
• [5] Single Frequency Network, URL: https://en.wikipedia.org/wiki/Single-frequency network
• [6] Fiedler J M, KJMP2 – a minimal MPEG-1/2 Audio Layer II decoder library, Copyright 2006 - 2013
• [7] Freeware Advanced Audio (AAC) Decoder, FAAD2, URL: https://ecsoft.org/faad2
• [8] Viterbi algorithm, URL: https://en.wikipedia.org/wiki/Viterbi algorithm
• [9] Clarke P K C July 2002 Reed-Solomon error correction, BBC R & D White Paper, WHP 031
• [10] Qt Software Development Platform, URL: https://www.qt.io/
• [11] Tzi-Dar Chiueh and Pei-Yun Tsai 2007 OFDM baseband Receiver Design for Wireless Communications, John Wiley & Sons (Asia) Pte Ltd
• [12] Open source Spiral System, URL: www.spiral.net/codegenerator.html
• [13] Linux apps that run everywhere, URL: https://appimage.org

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).