摘要:
The invention relates to a digital real-time data processing system that processes digital input data streams, which are received by several digital data sources (4), into digital output data streams and transfers them to digital data sinks (32). The digital data processing system (1) comprises a control unit (20) for controlling a multiplexer (13), a demultiplexer (25) and a digital data processing unit (17), whereby the control unit (20) cyclically interconnects the inputs (12) of the multiplexer for a constant fraction of time (Ti) of the cycle time (Tcycle) to a data input (16) of the data processing unit (17), whereby the control unit cyclically interconnects the outputs (29) of the demultiplexer (25) for a constant fraction of time (Ti) to the associated digital data sinks (32), and the control unit (20) activates the data processing unit (17) for processing the data, which is connected through by the multiplexer (13) and which is of a digital input data stream received with a defined data transmission rate, for a variable data processing time (Tactive).
摘要:
The invention relates to a method for jointly transferring ISDN and ADSL data between a first station (10) and a second station (20) over a transmission line (1020), involving the following steps: modulating an ISDN-data stream (1012) to be transferred as a mixed data stream upstream to the second station (20) by means of an ASDL modulator (101) in an ASDL data stream in the first station (10); demodulating the mixed data stream in the second station (20) by means of an ASDL demodulator (201) in the corresponding transferred ASDL data stream (2011) and the corresponding transferred ISDN data stream (2012). The invention also relates to a corresponding device for implementing said method.
摘要:
The invention relates to a line terminator unit for a subscriber line which transmits and receives broad-band signals via a single subscriber line. Said broad-band signals are composed of a broad-band or narrow-band low-frequency voice signal and a broad-band higher-frequency data signal. The frequency bands of the voice signal and the data signal substantially do not overlap. The inventive line terminator unit is provided with a digital frequency separating filter in the digital part of the line terminator unit. Said frequency separating filter is arranged in the digital part of the line terminator unit and serves to distinguish between the low-frequency voice signal and the higher-frequency data signal. The line terminator unit is especially useful for separating an ISDN or POTS voice signal from an ADSL data signal.
摘要:
A system with multiple processors sharing a single memory module without noticeable performance degradation is described. The memory module is divided into n independently addressable banks, where n is at least 2 and mapped such that sequential addresses are rotated between the banks. Such a mapping causes sequential data bytes to be stored in alternate banks. Each bank may be further divided into a plurality of blocks. By staggering or synchronizing the processors to execute the computer program such that each processor access a different block during the same cycle, the processorts can access the memory simltaneously. Additionally, a cache is provided to enable a processor to fetch from memory a plurality of data words from different memory banks to reduce memory latency caused by memory contention.
摘要:
A method and an apparatus are disclosed for retrieving information transmitted with a first signal (ADSL), said first signal being affected by noise caused by a second signal (ISDN) transmitted over the same signal channel at the same time. The noise caused by the second signal is estimated so as to be able to retrieve the information transmitted with the first signal even if, at the beginning of the operation, no noise caused by the second signal should be present for carrying out a training procedure. The method and the apparatus are preferably employed in communication networks, in particular fixed-line communication networks. The first signal is preferably a DSL signal, and the second signal is preferably an ISDN signal.
摘要:
The invention relates to a method for jointly transferring ISDN and ADSL data between a first station (10) and a second station (20) over a transmission line (1020), involving the following steps: modulating an ISDN-data stream (1012) to be transferred as a mixed data stream upstream to the second station (20) by means of an ASDL modulator (101) in an ASDL data stream in the first station (10); demodulating the mixed data stream in the second station (20) by means of an ASDL demodulator (201) in the corresponding transferred ASDL data stream (2011) and the corresponding transferred ISDN data stream (2012). The invention also relates to a corresponding device for implementing said method.
摘要:
he invention relates to a line terminator unit (100) for a subsc riber line (4) which transmits and receives broad-band signals via a single subscriber line. Said broad-band signals are composed of a broad-band or narrow-band low-frequency voice signal and a broad-band higher-frequency data signal. The frequency bands of the voice signal and the data signal substantially do not overlap. The inventive line terminator unit is provided with a digital frequency separating filter in the digital part of the line terminator unit. Said frequency separating filter is arranged in the digital part of the line terminator unit and serves to distinguish between the low-frequency voice signal and the higher-frequency data signal. The line terminator unit is especially useful for separating an ISDN or POTS voice signal from an ADSL data signal.
摘要:
The invention relates to a digital real-time data processing system that processes digital input data streams, which are received by several digital data sources (4), into digital output data streams and transfers them to digital data sinks (32). The digital data processing system (1) comprises a control unit (20) for controlling a multiplexer (13), a demultiplexer (25) and a digital data processing unit (17), whereby the control unit (20) cyclically interconnects the inputs (12) of the multiplexer for a constant fraction of time (Ti) of the cycle time (Tcycle) to a data input (16) of the data processing unit (17), whereby the control unit cyclically interconnects the outputs (29) of the demultiplexer (25) for a constant fraction of time (Ti) to the associated digital data sinks (32), and the control unit (20) activates the data processing unit (17) for processing the data, which is connected through by the multiplexer (13) and which is of a digital input data stream received with a defined data transmission rate, for a variable data processing time (Tactive).