> As far as I know, the DVB-H trials in the air are always using 8k or 2k. That is because they use standard DVB-T transmitters. > I don't remember why (I just forgot it) but someone told me that there > is no real need to use 4k. But I have true DVB-H test transmitter at hand and can tell you that what counts most is carrier modulation. There is big impact between sending in QPSK or something else and little between the 8k or 2k. So practically we are using DVB-T front-end for testing and that is enough. Another problem is the payload. Most of practical trials were done using Nokia terminals. These terminals do not support H.264, just Real player is used. Besides this, service discovery is not standardized yet so the terminals use proprietary air interface which has been only recently published by Nokia. Now we have to get Envivio H.264 encoder running with the test transmitter but there are compatibility problems with our playout system. Envivio produces H.264 stream which should be DVB-H compatible. When running the output over LAN we can play it using the VLC player. So now we have to put it on air and see how it can be received.
