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Technical Review | January-March 2012
This workshop was directed at broadcasters needing assistance in deciding upon the selection of DAB+ digital radio broadcasting. With five speakers the workshop highlighted successful DAB+ deployment in Australia, business opportunities available on digital radio, radio with pictures, visual radio, and a look at the DAB family of standards and technologies.
DVB-T to DVB-T2 Fundamentals to Planning
The DVB workshop, presented by John Bigeni and Gerard Faria, addressed basic fundamentals of the underlying key technology of COFDM modulation and how this produces a near perfect transmission. It covered key technologies which make up the DVB-T2 standard. It also covered the characteristics of DVB-T2, especially looking at its flexibility through the use of different bitrates for more robustness and the use of Multiple PLP which allows full control of the services provided.
True Efficiency in Broadcasting
Adam Pinch of Dolby and his team of engineers covered a range of topics around broadcast audio, including multi- channel production, loudness, metadata, and playback. Audio metadata provides a powerful way to manage and control program loudness, dynamic range control and other features. The use of dialogue normalisation, dynamic range control and down mixing using Dolby media meter and metadata emulator was demonstrated using audio and video samples.
Nils Ahrens, Jurgen Steinheber, Li Bin and Bettina Koethner of Rhode & Schwarz presented the latest advancements in broadcast transmitter systems, including new developments in solid state technologies especially LDMOS, and improved transmitter power efficiency. Also highlighted were the methods used for measuring power efficiency and identified parameters constantly referred to in energy efficiency studies. Latest solutions available for DVB-T2 network implementation were also discussed.
HE-AAC for Digital Broadcasting Hands-on
Stefan Meltzer and Toni Fiedler from Fraunhofer IIS presented the deployment of HE-AAC as the audio codec in DTV networks such as DVB-T2. The broadcast signal chain was demonstrated with real world examples in Europe and 5.1 surround sound transmissions. Generating and
Stefan Krueger
The DVB- T2 Trial in Singapore: Key Aspects from an Extensive Test
Holger Meinzer
Holger Meinzer and Stefan Krueger of Media Broadcast looked at their latest DVB-T2 trial. Singapore’s media regulator MDA, initiated an extensive DVB-T2 trial in 2011. Media Broadcast described how they designed all test and measurement procedures to define optimum system constellations and network performance. Trial results were discussed with the participants unveiling key aspects of SFN, Multiple-PLP and indoor coverage, which was one of the requirements from MDA.
handling of metadata was also discussed for scenarios using HE-AAC only, as well as in heterogonous environments (transcoding). Target bitrates versus achievable quality was explained by means of independent listening tests and demonstration with sound samples.
Multichannel Audio: Production to Playback
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