Transmitting and receiving multimedia data using an in-band channel and an out-of-band control channel

摘要

Multimedia data is transmitted from a transmitter to a receiver over an air interface having a predetermined bandwidth. A first data stream 11a-11n comprising multimedia data items and control data items is received by server 10. Control data items such as the transport stream and codec configuration data are extracted by extraction mechanism 18a-18n from the first data stream to produce a multimedia data stream 17a-17n and a control data stream 15a-15n. The multimedia data stream is transmitted to a receiver (26, figure 3) over a first channel and the control data stream is transmitted over a second channel different to the first channel, and the first channel is an in-band channel of the air interface, and the second channel is an outof-band channel.