NDLI: Using MPEG-4 audio for DRM digital narrowband broadcasting

Content Provider	IEEE Xplore Digital Library
Author	Dietz, M. Mlasko, T.
Copyright Year	2000
Description	Author affiliation: Fraunhofer Inst. for Integrated Circuits, Erlangen, Germany (Dietz, M.)
Abstract	DRM (Digital Radio Mondiale) is an international consortium, working on the definition of a world-wide standard for digital narrowband broadcasting in short- and medium-wave bands. One major requirement for a digital system in these bands is the bandwidth compatibility with existing analogue services. This means that the system needs to operate with a channel bandwidth of 9 or 10 kHz. Therefore DRM has a need for highly efficient audio and speech coding. A further requirement is error robustness. Due to the fading characteristics of the channel, signal errors may occur in spite of digital modulation and channel coding. Last but not least DRM wants to use an international standard to make sure that widespread, well-tested and well-supported algorithms are being used. Following these requirements, DRM has chosen parts of MPEG-4 audio for the DRM system. Based on listening tests performed in cooperation with the NADIB project, the European predecessor of DRM, MPEG has proposed audio and speech coding algorithms suitable for use within DRM. Since then, more work on these algorithms has been done within Version 2 of MPEG-4. MPEG-4 offers highly efficient audio coding by the AAC algorithm as well as state-of-the-art CELP speech coding. Both algorithms are very flexible in terms of codec configuration and bit rate. In addition to that, they support special error robust modes for use in error prone channels. DRM has chosen MPEG-4 AAC for audio coding. The MPEG-4 CELP is a very good candidate for the speech coding part of the system. The DRM specification will be finalized in 2000.
Starting Page	205
Ending Page	208
File Size	408923
Page Count	4
File Format	PDF
ISBN	0780354826
DOI	10.1109/ISCAS.2000.856032
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-05-28
Publisher Place	Switzerland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MPEG 4 Standard Narrowband Digital audio broadcasting Speech coding Radio broadcasting Bandwidth Robustness Audio coding Digital Radio Mondiale Digital systems
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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