A kind of triggering device and triggering method of spdif interface signal

Abstract

The invention discloses a trigger device for an SPDIF interface signal, comprising an analog comparator, an SPDIF interface decoding module, a memory, a trigger comparison module, a subsequent processing module and a controller; the SPDIF interface signal is converted and transmitted to the SPDIF through the analog comparator In the interface decoding module; the SPDIF interface decoding module judges the sampling rate of the audio signal in the SPDIF interface through high-speed clock acquisition, and the SPDIF interface decoding module sends all information to the trigger comparison module for comparison with the trigger condition, and the trigger signal is generated when it matches the trigger condition. The information is sent to the memory for storage, and at the same time, the information is sent to the subsequent processing module; the controller controls the SPDIF interface decoding module, the memory, the trigger comparison module and the subsequent processing module. Through the above method, the present invention can collect and analyze signals through the trigger mode specially customized for the SPDIF interface, enhance the analysis and triggering ability of the electronic measuring instrument for the SPDIF interface, and improve the efficiency of users debugging the SPDIF interface.

Description

technical field [0001] The invention relates to the field of triggering methods for SPDIF signals in electronic measuring instruments, in particular to a triggering device and a triggering method for SPDIF interface signals. Background technique [0002] SPDIF is the abbreviation of SONY / PHILIPS Digital Audio Interface. The SPDIF interface is widely used in consumer digital audio products. Because in the SPDIF interface, the sampling rate needs to be automatically adapted, traditional electronic measuring instruments can only trigger and collect SPDIF interface signals through simple trigger methods such as edges, which is not conducive to the capture, positioning and subsequent analysis of the measured signal. Therefore, it is necessary to equip electronic measuring instruments with a special SPDIF trigger mode, which is used to analyze and extract the pre-information, audio data information and additional information of the SPDIF interface signal for further analysis and ...

AI Technical Summary

Problems solved by technology

Because in the SPDIF interface, the sampling rate needs to be automatically adapted, traditional electronic measuring instruments can only trigger and collect SPDIF interface signals through simple trigger methods such as edges, which is not conducive to the capture and positioning of the measured signal and subsequent analysis

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