| 摘要 |
<p>The invention relates to a method of allowing the transmission of data along a return transmission path from one or more broadcast data receivers to a remote location, typically a broadcast location. The digital data is transmitted in a differential QPSK form thereby allowing external memory means to be not required and the data to be stored in the memory of an integrated circuit transmitter, thereby providing cost savings in the manufacture of the broadcast data receiver.</p> |
