A method and device for monitoring AES3 output of digital audio equipment

Abstract

The present application provides a method and device for monitoring the AES3 output of a digital audio device, the method comprising: collecting the AES3 baseband signal to be output of the digital audio device at the AES3 output connector of the digital audio device; decoding the AES3 baseband signal to be output to obtain the decoding result of the AES3 baseband signal to be output; determining the AES3 output monitoring result of the digital audio device according to the signal state information represented by the decoding result; and executing corresponding AES3 output management measures according to the AES3 output monitoring result of the digital audio device. The method provided by the above scheme decodes and analyzes the AES3 baseband signal to be output before the digital audio device outputs the AES3 baseband signal, so as to timely discover the abnormality of the digital audio device, and take corresponding AES3 output management measures in time to help the digital audio device return to normal as soon as possible, thereby ensuring the operational reliability of the digital audio device.

Description

Technical Field

[0001] The present application relates to the technical field of audio data processing, and in particular to a method and device for monitoring AES3 output of a digital audio device. Background Art

[0002] For radio and television broadcasting, live sound reinforcement and other occasions, digital audio equipment must have a high degree of operational reliability to meet the requirements of these occasions for low failure rate and low interruption time.

[0003] AES3 is one of the commonly used interface types in professional digital audio equipment. The quality of its output signal is directly related to the signal source quality of the subsequent equipment. However, in actual application, due to the influence of various factors, the normal state of the AES3 output baseband signal and the audio source it carries is often affected, resulting in different types of faults or faulty operation. Therefore, how to monitor the AES3 output of digital audio equipment to ensure the operational reliability of digital audio equipment has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The present application provides a method and apparatus for monitoring the AES3 output of a digital audio device, so as to solve the defects of the prior art that the operational reliability of the digital audio device cannot be guaranteed.

[0005] The first aspect of the present application provides a method for monitoring AES3 output of a digital audio device, comprising:

[0006] At the AES3 output connector of the digital audio device, collecting the AES3 baseband signal to be output by the digital audio device;

[0007] Decoding the AES3 baseband signal to be output, and obtaining a decoding result of the AES3 baseband signal to be output;

[0008] Determining an AES3 output monitoring result of the digital audio device according to the signal state information represented by the decoding result;

[0009] According to the AES3 output monitoring result of the digital audio device, corresponding AES3 output management measures are executed.

[0010] Optionally, also include:

[0011] In the processing unit of the digital audio device, collecting original data to be output by the digital audio device;

[0012] The AES3 output monitoring result of the digital audio device is determined according to a consistency comparison result between the decoding result of the AES3 baseband signal to be output and the original data to be output.

[0013] Optionally, when the digital audio device is an AES3 digital audio distributor, the method further includes:

[0014] At the AES3 input connector of the digital audio device, collecting an input AES3 baseband signal of the digital audio device;

[0015] The AES3 output monitoring result of the digital audio device is determined according to a consistency comparison result between the AES3 baseband signal to be output and the input AES3 baseband signal.

[0016] Optionally, also include:

[0017] Performing digital-to-analog conversion on the AES3 baseband signal to be output to obtain a corresponding analog baseband signal;

[0018] The AES3 output monitoring result of the digital audio device is determined according to the baseband amplitude information of the analog baseband signal.

[0019] Optionally, determining the AES3 output monitoring result of the digital audio device according to the baseband amplitude information includes:

[0020] Determine the peak-to-peak value and the RMS value of the baseband amplitude according to the baseband amplitude information;

[0021] The AES3 output monitoring result of the digital audio device is determined according to the output impedance matching condition represented by the peak-to-peak value and the RMS value.

[0022] Optionally, determining the AES3 output monitoring result of the digital audio device according to the baseband amplitude information includes:

[0023] The AES3 output monitoring result of the digital audio device is determined according to the magnitude relationship between the output baseband voltage represented by the baseband amplitude information and a preset output baseband voltage threshold.

[0024] Optionally, also include:

[0025] Generating an eye diagram corresponding to the analog baseband signal;

[0026] The AES3 output monitoring result of the digital audio device is determined according to the morphological characteristics of the eye diagram.

[0027] A second aspect of the present application provides a digital audio device AES3 output monitoring device, comprising:

[0028] A signal collection module, used for collecting the AES3 baseband signal to be output by the digital audio device at the AES3 output connector of the digital audio device;

[0029] A decoding module, used for decoding the AES3 baseband signal to be output, and obtaining a decoding result of the AES3 baseband signal to be output;

[0030] A monitoring module, configured to determine an AES3 output monitoring result of the digital audio device according to the signal status information represented by the decoding result;

[0031] The management module is used to execute corresponding AES3 output management measures according to the AES3 output monitoring result of the digital audio device.

[0032] Optionally, the monitoring module is further used to:

[0033] In the processing unit of the digital audio device, collecting original data to be output by the digital audio device;

[0034] The AES3 output monitoring result of the digital audio device is determined according to a consistency comparison result between the decoding result of the AES3 baseband signal to be output and the original data to be output.

[0035] Optionally, when the digital audio device is an AES3 digital audio distributor, the monitoring module is further used to:

[0036] At the AES3 input connector of the digital audio device, collecting an input AES3 baseband signal of the digital audio device;

[0037] The AES3 output monitoring result of the digital audio device is determined according to a consistency comparison result between the AES3 baseband signal to be output and the input AES3 baseband signal.

[0038] Optionally, the monitoring module is further used to:

[0039] Performing digital-to-analog conversion on the AES3 baseband signal to be output to obtain a corresponding analog baseband signal;

[0040] The AES3 output monitoring result of the digital audio device is determined according to the baseband amplitude information of the analog baseband signal.

[0041] Optionally, the monitoring module is specifically used to:

[0042] Determine the peak-to-peak value and the RMS value of the baseband amplitude according to the baseband amplitude information;

[0043] The AES3 output monitoring result of the digital audio device is determined according to the output impedance matching condition represented by the peak-to-peak value and the RMS value.

[0044] Optionally, the monitoring module is specifically used to:

[0045] The AES3 output monitoring result of the digital audio device is determined according to the magnitude relationship between the output baseband voltage represented by the baseband amplitude information and a preset output baseband voltage threshold.

[0046] Optionally, the monitoring module is further used to:

[0047] Generating an eye diagram corresponding to the analog baseband signal;

[0048] The AES3 output monitoring result of the digital audio device is determined according to the morphological characteristics of the eye diagram.

[0049] A third aspect of the present application provides a digital audio device, comprising: a baseband high-impedance bypass recovery circuit deployed in an AES3 output connector, at least one processor and a memory;

[0050] The baseband high-impedance bypass sampling circuit samples the AES3 baseband signal to be output by the digital audio device;

[0051] The memory stores computer-executable instructions;

[0052] The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the method described in the first aspect and various possible designs of the first aspect.

[0053] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions. When a processor executes the computer-executable instructions, the method described in the first aspect and various possible designs of the first aspect are implemented.

[0054] The technical solution of this application has the following advantages:

[0055] The present application provides a method and device for monitoring the AES3 output of a digital audio device, the method comprising: collecting the AES3 baseband signal to be output of the digital audio device at the AES3 output connector of the digital audio device; decoding the AES3 baseband signal to be output to obtain the decoding result of the AES3 baseband signal to be output; determining the AES3 output monitoring result of the digital audio device according to the signal state information represented by the decoding result; and executing corresponding AES3 output management measures according to the AES3 output monitoring result of the digital audio device. The method provided by the above scheme decodes and analyzes the AES3 baseband signal to be output before the digital audio device outputs the AES3 baseband signal, so as to timely discover the abnormality of the digital audio device, and take corresponding AES3 output management measures in time to help the digital audio device return to normal as soon as possible, thereby ensuring the operational reliability of the digital audio device. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0057] Figure 1 A schematic diagram of a flow chart of a method for monitoring AES3 output of a digital audio device provided in an embodiment of the present application;

[0058] Figure 2 A schematic diagram of the overall process of the AES3 output monitoring method of a digital audio device provided in an embodiment of the present application;

[0059] Figure 3 An exemplary consistency comparison diagram provided for an embodiment of the present application;

[0060] Figure 4 A schematic diagram of a data processing flow of a high-speed baseband sampling and high-speed digital-to-analog conversion unit provided in an embodiment of the present application;

[0061] Figure 5 A schematic diagram of the structure of the AES3 output monitoring device for digital audio equipment provided in an embodiment of the present application;

[0062] Figure 6 A schematic diagram of the structure of a digital audio device provided in an embodiment of the present application;

[0063] Figure 7 A schematic diagram of the structure of a baseband high-impedance bypass recovery circuit provided in an embodiment of the present application.

[0064] The above drawings have shown clear embodiments of the present application, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0066] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the following embodiments, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0067] AES3 is one of the commonly used interface types in professional digital audio equipment. The quality of its output signal is directly related to the signal source quality of the subsequent equipment. However, in actual application, the following reasons often affect the AES3 output baseband signal and the audio source it carries, resulting in different types of failures or faulty operation. Some equipment must be restarted to recover, causing certain troubles to users.

[0068] (1) The defect of AES3 codec chip in digital audio equipment. When some dedicated chips encounter some special timing interference during use, the output will be suddenly interrupted. After resetting the chip, it will return to normal.

[0069] (2) Due to impedance mismatch in the transmission link or downstream equipment, the output baseband signal is distorted or short-circuited. In severe cases, the quality of the transmission signal deteriorates, which is often manifested as intermittent signal or interrupted output.

[0070] (3) The AES3 codec chip or AES3 driver circuit fails. Some critical faults or soft faults cannot be detected and located, resulting in unknown signal degradation.

[0071] (4) The audio processing unit program runs abnormally or partially freezes, resulting in sudden no output, output content not consistent with settings, and other faults.

[0072] In view of the above problems, the embodiment of the present application provides a method and device for monitoring the AES3 output of a digital audio device, the method comprising: collecting the AES3 baseband signal to be output of the digital audio device at the AES3 output connector of the digital audio device; decoding the AES3 baseband signal to be output to obtain the decoding result of the AES3 baseband signal to be output; determining the AES3 output monitoring result of the digital audio device according to the signal state information represented by the decoding result; and executing corresponding AES3 output management measures according to the AES3 output monitoring result of the digital audio device. The method provided by the above scheme decodes and analyzes the AES3 baseband signal to be output before the digital audio device outputs the AES3 baseband signal, so as to timely discover the abnormality of the digital audio device, and take corresponding AES3 output management measures in time to help the digital audio device return to normal as soon as possible, thereby ensuring the operational reliability of the digital audio device.

[0073] The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0074] The embodiment of the present application provides a method for monitoring the AES3 output of a digital audio device, which is used to monitor the reliability of the signal output of a digital audio device with an AES3 output interface. The execution subject of the embodiment of the present application is a digital audio device such as a digital audio distributor, a digital audio switcher, a digital audio matrix, a digital audio mixer, and a digital audio player.

[0075] like Figure 1 FIG. 1 is a flow chart of a method for monitoring AES3 output of a digital audio device provided in an embodiment of the present application, the method comprising:

[0076] Step 101: At an AES3 output connector of a digital audio device, an AES3 baseband signal to be outputted from the digital audio device is collected.

[0077] It should be noted that the AES3 output connector is located at the very end of the signal flow of the digital audio device and is downstream of the audio processing unit. Therefore, its anomalies are often no longer captured and identified by the audio processing unit. If there are no special means to compensate for it, it will cause such equipment to work unstably, which is an important reason for the reduced operational reliability.

[0078] Specifically, a baseband high-impedance bypass sampling circuit can be provided between the AES3 output connector and the AES3 driving circuit, so as to sample the AES3 baseband signal to be output from the digital audio device based on the baseband high-impedance bypass sampling circuit, that is, the AES3 baseband signal to be input into the AES3 output connector. Since the AES3 baseband signal to be output is sampled from the AES3 output connector of the digital audio device, it can be ensured that all output links are covered as much as possible, and the high-impedance sampling method can not only obtain the real signal status, but also prevent the sampling circuit from interfering with and affecting the original output link.

[0079] Step 102: Decode the AES3 baseband signal to be output to obtain a decoding result of the AES3 baseband signal to be output.

[0080] Specifically, the AES3 baseband signal to be output can be decoded by AES3 to restore the original audio data and signal clock. During the decoding process, one or more error information may be detected, including loss of lock error (inability to restore the baseband clock), channel decoding error (based on AES3 bi-phase flag encoding), valid flag error (AES3 subframe bit 28), parity error (AES3 subframe bit 31), CRC check error (from channel status register), etc. The original audio data, signal clock and detected error information are used as the decoding result of the AES3 baseband signal to be output.

[0081] Step 103: Determine the AES3 output monitoring result of the digital audio device according to the signal state information represented by the decoding result.

[0082] It should be noted that the error information included in the decoding result indirectly reflects the signal status information of the AES3 baseband signal to be output, and also reflects the quality status of the AES3 baseband signal to be output.

[0083] Specifically, it is possible to determine which problems exist in the AES3 baseband signal to be output according to the signal state information represented by the decoding result, and then generate a corresponding AES3 output monitoring result.

[0084] Step 104: Execute corresponding AES3 output management measures according to the AES3 output monitoring result of the digital audio device.

[0085] It should be noted that if there is no problem in the acquisition and decoding process, the error indicated by the AES3 output monitoring result often occurs in the decoding process of the lower-level device. The embodiment of the present application obtains this information in advance, which will help find the fault point. Through the digital audio device automatically or manually taking intervention measures, the fault and hidden dangers can be eliminated in time, allowing the digital audio device to resume normal operation.

[0086] Specifically, the AES3 output monitoring results of the digital audio device can be transmitted to the human-machine interface of the panel of the digital audio device itself, or to the host computer software, and prompts can be given through the device panel and the host computer software, so that the user can make a comprehensive judgment and handle these abnormal situations according to the prompts. Or the digital audio device can perform intelligent analysis and automatic emergency disposal based on these AES3 output monitoring results, such as restarting the device, resetting / resetting the codec unit, program self-check or entering the fault recovery mode, automatically switching to the redundant backup module, etc., so as to solve these abnormalities and restore the normal operation of the digital audio device.

[0087] On the basis of the above embodiment, in order to monitor the reliability of AES3 output of digital audio equipment as comprehensively as possible, as an implementable manner, in one embodiment, the method further includes:

[0088] Step 201, in a processing unit of a digital audio device, collecting original data to be outputted by the digital audio device;

[0089] Step 202: Determine the AES3 output monitoring result of the digital audio device according to the consistency comparison result between the decoding result of the AES3 baseband signal to be output and the original data to be output.

[0090] Among them, Figure 2 As shown, it is a schematic diagram of the overall process of the AES3 output monitoring method of the digital audio device provided by the embodiment of the present application. The digital audio device generally takes the processing unit as the core, the upstream is the signal input unit, and the downstream is the signal output unit. The input and output interface modes can be various digital audio interfaces (AES3, MADI), analog audio interfaces (microphone, line), and computer interfaces (network, USB, Bluetooth), etc. For simplicity, Figure 2 Only one AES3 digital input and one AES3 digital output are shown. The AES3 input part includes the AES3 input connector, AES3 receiving and decoding circuit (using a dedicated chip or a general-purpose FPGA), and the AES3 output part includes the AES3 encoder (using a dedicated chip or a general-purpose FPGA), AES3 driver (amplifier circuit and isolation transformer) and AES3 output connector.

[0091] It should be noted that the processing unit is the core of the entire digital audio device, usually composed of a CPU, a DSP, etc., to complete the core processing functions of the device, such as signal routing, signal generation, signal mixing, etc. The digital audio device receives the AES3 baseband signal through the AES3 input connector, and decodes the received AES3 baseband signal to obtain the original data, and then the processing unit performs corresponding data processing on the original data to obtain the original data to be output, and then performs AES3 encoding on the original data to be output to obtain the AES3 baseband signal to be output, and finally sends the AES3 baseband signal to be output to the AES3 output connector based on the AES3 driver.

[0092] Specifically, the original data (target reference signal) before being sent to AES3 encoding can be obtained from the processing unit, and then compared with the audio data in the decoding result obtained in the above step 102 for content consistency. The monitored link covers AES3 encoding, AES3 driving and part of the processing unit. When the consistency comparison result is completely inconsistent, or there are intermittent bit errors, it can be inferred that there may be problems with the link.

[0093] Based on the above embodiment, as an implementable manner, in one embodiment, when the digital audio device is an AES3 digital audio distributor, the method further includes:

[0094] Step 301, collecting an input AES3 baseband signal of a digital audio device at an AES3 input connector of the digital audio device;

[0095] Step 302: Determine the AES3 output monitoring result of the digital audio device according to the consistency comparison result between the AES3 baseband signal to be output and the input AES3 baseband signal.

[0096] It should be noted that if Figure 2 As shown, the AES3 digital audio distributor directly shapes, amplifies and drives the input AES3 baseband signal for output, without the AES3 decoding-processing-encoding link.

[0097] Specifically, it can be based on Figure 2 The baseband high-impedance bypass acquisition circuit in the digital audio device acquires the input AES3 baseband signal of the digital audio device at the AES3 input connector of the digital audio device, and then determines the AES3 output monitoring result of the digital audio device by comparing the consistency comparison result between the AES3 baseband signal to be output and the input AES3 baseband signal.

[0098] For example, Figure 3 As shown, it is an exemplary consistency comparison diagram provided by the embodiment of the present application, the input acquisition baseband signal is the input AES3 baseband signal, and the output acquisition baseband signal is the AES3 baseband signal to be output. Since the AES3 digital audio distributor does not have the AES3 encoding and decoding process, the main link delay is almost negligible compared to the baseband cycle. Therefore, it is only necessary to determine whether the input baseband and the output acquisition baseband are completely consistent in the time domain. The AES3 transmission clock is recovered and multiplied by more than 4 times from the output acquisition decoding unit as the comparison clock. This clock is used to sample the two basebands at the same time, and the unreliable transition edge data is shielded. Only the level during the stable period is compared to obtain the result of whether the baseband is consistent.

[0099] Based on the above embodiment, as an implementable manner, in one embodiment, the method further includes:

[0100] Step 401, performing digital-to-analog conversion on the AES3 baseband signal to be output to obtain a corresponding analog baseband signal;

[0101] Step 402: Determine the AES3 output monitoring result of the digital audio device according to the baseband amplitude information of the analog baseband signal.

[0102] It should be noted that the actual sampled baseband is not an ideal square wave pulse, and there are complex edge changes and waveform distortion, as well as jitter in the time axis direction. In order to enhance the basis for judging the baseband quality, the embodiment of the present application specifically introduces high-speed baseband sampling and high-speed digital-to-analog conversion units for baseband signals to obtain an analog baseband signal corresponding to the AES3 baseband signal to be output, and then obtain the amplitude-time variation information of the baseband signal, that is, the baseband amplitude information. The high-speed digital-to-analog conversion unit requires a higher sampling clock, that is, a higher sampling rate, which is more than 4 times the AES3 baseband clock (8-32 times is recommended), and the voltage axis quantization depth is at least 8 bits.

[0103] Specifically, in one embodiment, the peak-to-peak value and RMS value of the baseband amplitude may be determined according to the baseband amplitude information; and the AES3 output monitoring result of the digital audio device may be determined according to the output impedance matching condition represented by the peak-to-peak value and the RMS value.

[0104] Among them, the baseband amplitude is the output baseband voltage.

[0105] Specifically, the peak-to-peak value and RMS value of the baseband amplitude can be used to measure the matching degree of the output impedance. Since the AES3 signal adopts a 1:1 impedance transmission mode, when the impedance is fully matched, the peak-to-peak value or RMS value is exactly half of that when it is open circuit. Among them, AES3 stipulates an output tolerance of ±20%. When the AES3 output monitoring result of the digital audio device indicates the current impedance mismatch, a corresponding alarm is issued.

[0106] Specifically, in one embodiment, the AES3 output monitoring result of the digital audio device may be determined according to the magnitude relationship between the output baseband voltage represented by the baseband amplitude information and a preset output baseband voltage threshold.

[0107] Specifically, when the output baseband voltage is less than the output baseband voltage threshold, it is determined that the current output baseband voltage is too low, indicating that an AES3 driver failure or a transmission link short circuit may have occurred. At this time, the output quality and reliability of the signal are reduced, and it is necessary to capture and take corresponding AES3 output management measures in time.

[0108] Specifically, in one embodiment, an eye diagram corresponding to the analog baseband signal may also be generated; and the AES3 output monitoring result of the digital audio device may be determined according to the morphological characteristics of the eye diagram.

[0109] For example, Figure 4As shown, it is a schematic diagram of the data processing flow of the high-speed baseband sampling and high-speed digital-to-analog conversion unit provided in the embodiment of the present application. When the sampling rate of the high-speed baseband sampling and high-speed digital-to-analog conversion unit is high, the real waveform of the AES3 baseband signal to be output can be fully recorded, so as to be used for analyzing the baseband distortion, rising edge / falling edge time, etc. The sampling time base comes from the media reference clock of the digital audio device, or the AES3 baseband clock after de-jittering, which has a certain time stability, so it can capture the AES3 baseband jitter with relatively obvious changes. Through subsequent signal processing, an eye diagram can be formed, and the generated eye diagram can be sent to the host computer through the network interface for presentation.

[0110] Specifically, by analyzing the morphological features of the generated eye diagram, it can be determined whether the AES3 baseband signal to be output has an abnormality, so as to obtain the corresponding AES3 output monitoring result.

[0111] It should be noted that the monitoring means provided in the embodiments of the present application can be used alone or in combination. The more types of means used in combination, the more complete and reliable the information captured. The judgments obtained by some technical means can be confirmed and mined by another means. For example, the severe distortion of the baseband signal caused by the failure of the AES3 drive circuit may be manifested simultaneously in several links such as the baseband error monitoring, signal comparison and eye diagram presentation.

[0112] The AES3 output monitoring method for a digital audio device provided in an embodiment of the present application is to retrieve the AES3 baseband signal to be output of the digital audio device at the AES3 output connector of the digital audio device; decode the AES3 baseband signal to be output to obtain the decoding result of the AES3 baseband signal to be output; determine the AES3 output monitoring result of the digital audio device according to the signal state information represented by the decoding result; and execute corresponding AES3 output management measures according to the AES3 output monitoring result of the digital audio device. The method provided by the above scheme decodes and analyzes the AES3 baseband signal to be output before the digital audio device outputs the AES3 baseband signal, so as to timely discover the abnormality of the digital audio device, and take corresponding AES3 output management measures in time to help the digital audio device return to normal as soon as possible, thereby ensuring the operational reliability of the digital audio device.

[0113] The embodiment of the present application provides a digital audio device AES3 output monitoring device, which is used to execute the digital audio device AES3 output monitoring method provided in the above embodiment.

[0114] like Figure 5, which is a schematic diagram of the structure of the AES3 output monitoring device for digital audio equipment provided by the embodiment of the present application. The AES3 output monitoring device 50 for digital audio equipment comprises: a signal acquisition module 501 , a decoding module 502 , a monitoring module 503 and a management module 504 .

[0115] Among them, the signal retrieval module is used to retrieve the AES3 baseband signal to be output of the digital audio device at the AES3 output connector of the digital audio device; the decoding module is used to decode the AES3 baseband signal to be output and obtain the decoding result of the AES3 baseband signal to be output; the monitoring module is used to determine the AES3 output monitoring result of the digital audio device according to the signal state information represented by the decoding result; the management module is used to execute corresponding AES3 output management measures according to the AES3 output monitoring result of the digital audio device.

[0116] Specifically, in one embodiment, the monitoring module is further used to:

[0117] In the processing unit of the digital audio device, original data to be output by the digital audio device is collected;

[0118] The AES3 output monitoring result of the digital audio device is determined according to the consistency comparison result between the decoding result of the AES3 baseband signal to be output and the original data to be output.

[0119] Specifically, in one embodiment, when the digital audio device is an AES3 digital audio distributor, the monitoring module is further used to:

[0120] At the AES3 input connector of the digital audio device, collect the input AES3 baseband signal of the digital audio device;

[0121] The AES3 output monitoring result of the digital audio device is determined according to the consistency comparison result between the AES3 baseband signal to be output and the input AES3 baseband signal.

[0122] Specifically, in one embodiment, the monitoring module is further used to:

[0123] Perform digital-to-analog conversion on the output AES3 baseband signal to obtain a corresponding analog baseband signal;

[0124] The AES3 output monitoring result of the digital audio device is determined according to the baseband amplitude information of the analog baseband signal.

[0125] Specifically, in one embodiment, the monitoring module is specifically used to:

[0126] According to the baseband amplitude information, determine the peak-to-peak value and RMS value of the baseband amplitude;

[0127] Determine the AES3 output monitoring results of digital audio equipment based on the output impedance matching characterized by peak-to-peak and RMS values.

[0128] Specifically, in one embodiment, the monitoring module is specifically used to:

[0129] The AES3 output monitoring result of the digital audio device is determined according to the magnitude relationship between the output baseband voltage represented by the baseband amplitude information and a preset output baseband voltage threshold.

[0130] Specifically, in one embodiment, the monitoring module is further used to:

[0131] Generate an eye diagram corresponding to the analog baseband signal;

[0132] According to the morphological characteristics of the eye diagram, the AES3 output monitoring results of the digital audio device are determined.

[0133] Regarding the AES3 output monitoring device for digital audio equipment in this embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0134] The digital audio device AES3 output monitoring device provided in the embodiment of the present application is used to execute the digital audio device AES3 output monitoring method provided in the above embodiment. Its implementation method and principle are the same and will not be repeated here.

[0135] The embodiment of the present application provides a digital audio device, which is used to execute the AES3 output monitoring method of the digital audio device provided in the above embodiment.

[0136] like Figure 6 , which is a schematic diagram of the structure of a digital audio device provided by an embodiment of the present application. The digital audio device 60 comprises: a baseband high-impedance bypass circuit 601 deployed on an AES3 output connector, at least one processor 602 and a memory 603 .

[0137] The baseband high-impedance bypass recovery circuit recovers the AES3 baseband signal to be output from the digital audio device; the memory stores computer execution instructions; at least one processor executes the computer execution instructions stored in the memory, so that the at least one processor executes the digital audio device AES3 output monitoring method provided in the above embodiment.

[0138] Among them, Figure 7As shown, it is a structural schematic diagram of the baseband high-impedance bypass recovery circuit provided in an embodiment of the present application. The baseband high-impedance bypass recovery circuit is composed of a baseband isolation transformer, an isolation resistor and a recovery amplifier. The AES3 baseband signal to be output enters the baseband isolation transformer after being output from the AES3 driver, enters the isolation resistor through the baseband isolation transformer, enters the recovery amplifier through the isolation resistor, and finally the AES3 baseband signal to be output is sent to the processor by the recovery amplifier to enter the subsequent output reliability monitoring process.

[0139] It should be noted that the AES3 baseband signal collection point to be output is located at the AES3 output connector. The reason for this is to cover the entire output link as much as possible so that the information obtained can reflect the actual status of the signal at the output port. Secondly, a high-impedance collection method is used, that is, a high-input impedance collection amplifier is connected to the output link through a large-resistance resistor to obtain the signal, so that the impact of the recovery circuit on the original main output link is ignored as much as possible, including the impact on impedance and the impact of the collection circuit failure on the output. Here, the output impedance of AES3 is 75 ohms and 110 ohms. Collection resistors greater than 1K ohms can usually reduce the impact on the output impedance to below the range allowed by the standard. Resistors are passive devices. Selecting an isolation resistor with appropriate power generally does not cause AES3 output failure, even in the extreme case of a short circuit in the collection amplifier input.

[0140] A digital audio device provided in an embodiment of the present application is used to execute the AES3 output monitoring method of the digital audio device provided in the above embodiment. Its implementation method and principle are the same and will not be repeated here.

[0141] An embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the method for monitoring the AES3 output of a digital audio device provided in any of the above embodiments is implemented.

[0142] The storage medium containing computer executable instructions in the embodiment of the present application can be used to store computer executable instructions of the digital audio device AES3 output monitoring method provided in the aforementioned embodiment. Its implementation method and principle are the same and will not be repeated here.

[0143] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0144] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0145] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0146] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform some steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0147] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example for illustration. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0148] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for monitoring AES3 output of a digital audio device, characterized in that: include: At the AES3 output connector of the digital audio device, collecting the AES3 baseband signal to be output by the digital audio device; Decoding the AES3 baseband signal to be output, and obtaining a decoding result of the AES3 baseband signal to be output; Determining an AES3 output monitoring result of the digital audio device according to the signal state information represented by the decoding result; Executing corresponding AES3 output management measures according to the AES3 output monitoring result of the digital audio device; The method further comprises: Performing digital-to-analog conversion on the AES3 baseband signal to be output to obtain a corresponding analog baseband signal; Determining an AES3 output monitoring result of the digital audio device according to the baseband amplitude information of the analog baseband signal; The step of determining the AES3 output monitoring result of the digital audio device according to the baseband amplitude information of the analog baseband signal comprises: Determine the peak-to-peak value and the RMS value of the baseband amplitude according to the baseband amplitude information; Determine an AES3 output monitoring result of the digital audio device according to the output impedance matching condition represented by the peak-to-peak value and the RMS value; Alternatively, determining the AES3 output monitoring result of the digital audio device according to the magnitude relationship between the output baseband voltage represented by the baseband amplitude information and a preset output baseband voltage threshold; The method further comprises: Generating an eye diagram corresponding to the analog baseband signal; The AES3 output monitoring result of the digital audio device is determined according to the morphological characteristics of the eye diagram.

2. The method according to claim 1, characterized in that Also includes: In the processing unit of the digital audio device, collecting original data to be output by the digital audio device; The AES3 output monitoring result of the digital audio device is determined according to a consistency comparison result between the decoding result of the AES3 baseband signal to be output and the original data to be output.

3. The method according to claim 1, characterized in that When the digital audio device is an AES3 digital audio distributor, the method further includes: At the AES3 input connector of the digital audio device, collecting an input AES3 baseband signal of the digital audio device; The AES3 output monitoring result of the digital audio device is determined according to a consistency comparison result between the AES3 baseband signal to be output and the input AES3 baseband signal.

4. A digital audio device AES3 output monitoring device, characterized in that: include: A signal collection module, used for collecting the AES3 baseband signal to be output by the digital audio device at the AES3 output connector of the digital audio device; A decoding module, used for decoding the AES3 baseband signal to be output, and obtaining a decoding result of the AES3 baseband signal to be output; A monitoring module, configured to perform digital-to-analog conversion on the AES3 baseband signal to be output to obtain a corresponding analog baseband signal; determine the peak-to-peak value and RMS value of the baseband amplitude according to the baseband amplitude information; determine the AES3 output monitoring result of the digital audio device according to the output impedance matching conditions represented by the peak-to-peak value and the RMS value; or determine the AES3 output monitoring result of the digital audio device according to the magnitude relationship between the output baseband voltage represented by the baseband amplitude information and a preset output baseband voltage threshold; Generate an eye diagram corresponding to the analog baseband signal; determine an AES3 output monitoring result of the digital audio device according to the morphological characteristics of the eye diagram; The management module is used to execute corresponding AES3 output management measures according to the AES3 output monitoring result of the digital audio device.

5. A digital audio device, characterized in that: include: A baseband high impedance bypass circuit, at least one processor and a memory disposed at the AES3 output connector; The baseband high-impedance bypass sampling circuit samples the AES3 baseband signal to be output by the digital audio device; The memory stores computer-executable instructions; The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the method according to any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when a processor executes the computer-executable instructions, the method according to any one of claims 1 to 3 is implemented.

Images