Coded data generation or conversion – Digital code to digital code converters – Data rate conversion
Patent
1996-07-16
1998-11-10
Hoff, Marc S.
Coded data generation or conversion
Digital code to digital code converters
Data rate conversion
341123, 375354, H03M 7100
Patent
active
058350314
ABSTRACT:
When digitized signals are transmitted from a digital transmission system (NET1), e.g. a PDH system, to another digital transmission system (NET2), e.g. a SDH system, which operate at different clock rates (f.sub.1, f.sub.2), the clock rate must be adapted during the transition. To that end, the digitized signals are converted into discrete-time and value-discrete signals in a decoding unit (D1) at the clock rate (f.sub.1) of the one digital transmission system (NET1). A conversion unit (UE1) converts the discrete-time and value-discrete signals into further discrete-time and value-discrete signals, whose pulse repetition rate is adapted to a clock rate derived from the clock rate (f.sub.2) of the other digital transmission system (NET2). This is achieved e.g. with a low-pass filter (FIL1) and a sample-and-hold device (AH1). An encoding unit (K1) converts the further discrete-time and value-discrete signals into digital signals, whose bit rate is adapted to the clock rate (f.sub.2) of the other digital transmission system (NET2), which allows the digital signals to be transmitted in the other digital transmission system (NET2).
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ALCATEL N.V.
Hoff Marc S.
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