Patent ID: 8682461
Filing Date: 2014-03-25
Classification: H04H

Abstract:
1. A audio signal processing system which includes a plurality of devices and an audio network interconnecting the plurality of devices and which, per predetermined period, circulates a transmission frame through the plurality of devices, the transmission frame having storage regions for storing therein various data to be communicated between the plurality of devices, each of the plurality of devices being capable of reading out data from some of the storage regions of the transmission frame or capable of writing data to some of the storage regions of the transmission frame, said plurality of devices including at least: an input device including an input section that inputs audio signals from outside, and an input signal write section that writes the audio signals, input via said input section, into an audio signal storage region of the transmission frame as input signals to said audio signal processing system; a first signal processing device including a first readout section that reads out the input signals from the audio signal storage region, a first signal processing section that performs signal processing on the input signals read out by said first readout section, a first output signal write section that writes the processed audio signals, from said first signal processing section, into the audio signal storage region of the transmission frame as first output signals, and a network interface that writes first state data, indicative of whether or not said first signal processing device is in a normal state, into a management data storage region of the transmission frame, the first state data being generated from the first signal processing device itself by checking whether its own operating state is normal or not; a second signal processing device including a second readout section that reads out the input signals from the audio signal storage region, a second signal processing section that performs same signal processing as said first signal processing section on the input signals read out by said second readout section, and a second output signal write section that writes the processed audio signals, from said second signal processing section, into the audio signal storage region of the transmission frame as second output signals; and an output device including a network interface that reads out said first state data from the management data storage region, an output signal readout section that reads out said first output signals from the audio signal storage region when said first state data read out by said network interface is indicative of a normal state but reads out said second output signals from the audio signal storage region when the read-out first state data is indicative of an abnormal state, and an output section that outputs the audio signals, read out by said output signal readout section, to outside.