| 摘要 |
A first application (1) receives continuously in real time information relating to, for example, a speech conversation, a video signal, or telemetry information, and includes a variable rate data generator (3) which generates from that information a continuous data stream for transmission. A second application (2) comprises a device which receives other data for transmission, such as encryption synchronisation data, channel coding information, a text message, or position data (e.g. GPS (Global Positioning System) data), e.g. relating to the location of a mobile transmitter. A data combiner (5) selects a rate at which data should be generated for transmission by the variable rate data generator (3) of the application (1) on the basis of whether or not the other application (2) is producing data for transmission and preferably also on the basis of the maximum data transmission capacity, e.g. maximum bit rate, of the transmission channel to be used.
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