Patent ID: 6658097
Filing Date: 2003-12-02
Classification: H04L,H04M

Abstract:
A Codec circuit for increasing the data transmission rate in a modem transmission having(a) a programmable digital transmission filter (13) which is provided in a transmission signal path of the Codec circuit; (b) a programmable digital reception filter (22) which is provided in a reception signal path of the Codec circuit; (c) and having a modem signal detection device (31) for detecting whether the transmission signal which is output on the transmission signal path or the reception signal which is received on the reception signal path is a modem signal, wherein (d) the programmable digital filters (13, 22) each contain a first digital switchover filter (45) with a small filter bandwidth and a second digital switchover filter (46) with an increased filter bandwidth, (e) which can be switched over by the modem signal detection circuit (31) by means of a controllable switching device (42).