| 摘要 |
A method and network configuration obtain a gradient of output signals of a network for processing discrete-time signals with respect to network parameters. The network includes a first subnetwork having only delay-free elements, being acted upon by input signals and emitting output signals, and a second subnetwork having only time-lag elements, receiving signals from the first subnetwork and feeding back the signals with a delay to the first subnetwork. Further output signals are each formed corresponding to the gradient of the output signals with respect to the network parameters. The further output signals are equal to the sum of all of the signals produced by linking all of the input signals, all of the signals delayed by the second subnetwork and all of the network parameters through a first linking function, and of all of the signals being a result of the linkage of all of the input signals, all of the signals delayed by the second subnetwork, and all of the network parameters through a second linking function multiplied by internal signals being delayed in accordance with the second subnetwork. The first linking function is equal to the gradient of a transfer function of the first subnetwork with respect to the network parameters. The second linking function is equal to the gradient of the transfer function of the first subnetwork with respect to the signals delayed by the second subnetwork. The internal signals are equal to the gradient of the signals supplied by the first subnetwork to the second subnetwork with respect to the network parameters.
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