Patent ID: 6307864
Filing Date: 2001-10-23
Classification: H04L,Y10T

Abstract:
A method for the baseband transcoding of a stream of digital information for transmission within an analog signal that is formed using pulses associated with coding symbols, said method comprising the steps of:storing first digital samples in a first memory, the first digital samples representing at least part of the pulses associated with symbols of a first type of coding;storing second digital samples in a second memory, the second digital samples representing at least part of the pulses associated with symbols of a second type of coding;selecting either the first type of coding or the second type of coding for the transmission;if the first type of coding is selected, performing a first coding process that includes the steps of:extracting pairs of bits from the stream of digital information; anddelivering the pairs of bits at a first frequency, each delivered pair of bits corresponding to one of the symbols of the first type of coding;if the second type of coding is selected, performing a second coding process that includes the steps of:processing bits from the stream of digital information; anddelivering corresponding symbols of the second type of coding at a second frequency, each symbol of the second type of coding being delivered as a pair of bits;reading the digital samples from the first or second memory at a third frequency based on the type of coding selected and the value of the delivered pair of bits; andgenerating a digital output signal from the read digital samples, the digital output signal being representative of the analog signal to be transmitted.