Synchronous
Method of data transmission in which the pace ofIssue rests on the clock.
Speech Synthesis
Technique that transforms text into voice message after conversion elements of text, grapheme, sound elements in the phonemes.
Phonemes are abstract elements. Therefore they are then replaced in the treatment by the portions of the signal associated. (after intermediate step of diphones).
Another technique consists of an assembly of segments of previously recorded words, which is intended to build a complete statement, used by a server Voice Interactive.
T-DMB
Standard ETSI (TS 102 427 and TS 102 428), the T -DMB is a system dissemination multimedia based solely on terrestrial transmitters (conversely the S-DMB, which uses a broadcast satellite in addition).
The T-DMB specified encoding MPEG-4 Part 10 (H.264) For video and MPEG-4 Part 3 BSAC or HE -AAC V2 for the audio, these streams are then encapsulated in packets MPEG-2 TS, which allows multiplexing audio, video and other data. A modulation OFDM4DPSK-preceded by a Reed Solomon encoding and interleaving allows the T-DMB signal to be very robust to fading and masking effects.
The distribution method is of type DAB Land, therefore must rely on a network of repeaters important, the cost is estimated at 40 million euros for the single city of Seoul in South Korea.
Testing and deployment
In terms of deployment, South Korea is clearly the leader wire technology. Six licenses were awarded in May 2005 by the KBC (Korean Broadcasting commission), three T-DMB licenses offered to existing radio broadcasters (KBS, MBC and SBS) and three other players (the news channel YTN, the Radio CBD and industrial). Available on tape VHF (Band III T-DAB) in late 2006, offers T-DMB in South Korea was in 11 television channels, 25 radio channels and 8 data (push, Alert ...). The economic model is based on free channels in return for advertising. The Korean government estimates that 80% of mobile handsets sold in the next 3 years will be completed "DMB-enabled". Over one million receptors T-DMB have been sold on 1 June 2006 integrations with multiple mobile phones, cars, computers portable camera Digital…
In parallel, tests were conducted in Europe particularly in Germany where the DAB network is important but where commercial services have not taken off. The opportunity was too good: the world cup football 2006! STMicroelectronics in collaboration with Blaupunkt has deployed a test network in 12 German cities, and mobile terminals are available as well heard the Samsung SGH-P900. In France a consortium led by Bouygues Telecom, TF1 and VDL Samsung (company specializing in radio broadcasting to digital) tests conducted in late 2005.
Spreadsheets
Software Creation and manipulation of interactive tables digital.
English: spreadsheet.
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