Patent ID: 6522695
Filing Date: 2003-02-18
Classification: H03M

Abstract:
A transmitter comprising:input means for receiving a digital information signal; means for encoding the digital information signal and generating an output signal including: portions of the output signal in the form of encoded portions of the digital information signal under the influence of a control signal of a first type, and portions of the output signal in the form of portions of the digital information signal under the influence of a control signal of a second type; control means for generating the control signal of the first type and the control signal of the second type; means for generating: a first identification signal of a first type which indicates that the output signal possibly includes a portion of the digital information signal which has been encoded in the encoding means; and a first identification signal of a second type which indicates that the output signal does not include any portions of the digital information signal which have been encoded by the encoding means; means for generating, for a portion of the digital information signal: a second identification signal of a first type depending on the control signal of the first type and the first identification signal of the first type; and a second identification signal of a second type depending on the control signal of the second type and the first identification signal of the first type; combining means for combining the output signal of the encoding means, the first identification signal and, if the first identification signal is of the first type, the second identification signal, so as to obtain a composite signal to be applied to a transmission medium.