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alanh

Atsc Transmitter Channels

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Dyle Mobile TV, the mobile version of ATSC that was available in some US cities, has been terminated.

As of May 22, 2015, Dyle® mobile TV is no longer in service, and Dyle-enabled devices and their apps will no longer be supported.

http://www.dyle.tv/

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New Taste,

This service was the addition of a low data rate MPEG-4 signal with more error correction which was added to existing broadcasts.

It was probably squashed by the Telcos. The National Association of Broadcasters in the USA has found that 80 % of smart phones do not have the FM receiver activated on purchase. This pushes the users to use apps and the data has to flow through Telcos adding to their profits.

DVB-T2 in Europe also has a lite function for transmission to hand held devices. It is designed to minimise battery consumption. I haven't seen widespread adoption in smart phones. The only broadcast video service which is commonly available is a DMB (the DAB+ radio but with MPEG-4 video added) in South Korea.

Alanh

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It was probably squashed by the Telcos.

Unlikely. Dyle had some big names behind it, including NBC/Universal, Fox, Ltd. News, Cox, Hearst, etc. It also wasn't something the telcos could block/disable, since it used add-on hardware and a 3rd-party app.

No, what probably killed it was the same thing you touched on in your 3rd paragraph: nobody was interested, and anyone who was bought a proper ATSC tuner add-on for their tablet/phone. The last version of the Dyle app seems to have had <5000 downloads, compared to multiple other apps for full-blown ATSC phone/tablet tuners that each have 100,000-500,000 in a similar timeframe...

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New Taste,

This service was the addition of a low data rate MPEG-4 signal with more error correction which was added to existing broadcasts.

It was probably squashed by the Telcos. The National Association of Broadcasters in the USA has found that 80 % of smart phones do not have the FM receiver activated on purchase. This pushes the users to use apps and the data has to flow through Telcos adding to their profits.

DVB-T2 in Europe also has a lite function for transmission to hand held devices. It is designed to minimise battery consumption. I haven't seen widespread adoption in smart phones. The only broadcast video service which is commonly available is a DMB (the DAB+ radio but with MPEG-4 video added) in South Korea.

Alanh

There's also the One-Seg mobile TV service in Japan and other countries that use ISDB-T.

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ISDB-T has been sold in South America and a few African countries on the basis they can transmit signals to mobile phones.

ASTC is a single carrier system so you cannot reduce the bandwidth of the main transmitter and add a separate signal for mobiles. ISDB-T like DVB-T are multicarrier systems and this is feasible. In DVB-T2lite has the same function.

Alanh

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ASTC is a single carrier system so you cannot reduce the bandwidth of the main transmitter and add a separate signal for mobiles. ISDB-T like DVB-T are multicarrier systems and this is feasible. In DVB-T2lite has the same function.

No, it's very difficult/impossible to do it in DVB-T - the carrier allocation structure simply doesn't lend itself to reducing RF bandwidth to accomodate mobile signals in a shared broadcast. DVB-H is timesliced into the broadcast; while DVB-T2lite is both timesliced and distributed on a subset of the OFDM carriers.

ISDB-T with its segmented nature is the only one where the mobile user effectively receives a narrow(er) bandwidth signal from a larger shared broadcast...

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