CN107864004B - Method and device for controlling signal emission state - Google Patents
Method and device for controlling signal emission state Download PDFInfo
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Abstract
The invention relates to a control method and a device for a signal transmitting state, which are used for acquiring a state signal of an in-band signaling switch, a signaling frequency value and a detection threshold value; if the in-band signaling switch state signal corresponds to an on state, acquiring an audio signal carrying signaling; identifying signaling in the audio signal according to the signaling frequency value, and calculating the energy value of the signaling; if the energy value of the signaling is larger than the detection threshold value, the state of transmitting the keying signal is converted into a transmitting state. In the invention, under the corresponding opening state of the in-band signaling switch state signal, an audio signal carrying a signaling is obtained, the signaling in the audio signal is identified according to the signaling frequency value, the energy value of the signaling is calculated, and if the energy value of the signaling is greater than a detection threshold value, the state of transmitting the keying signal is converted into the transmitting state; the audio signal carries signaling, and the audio transmission line is shared, so that the function of transmitting the control signal and the communication signal can be completed only by the audio line, the use of the line is reduced, and the resource is saved.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for controlling a signal transmission status.
Background
At present, control signaling and communication signals are involved in a communication process, generally the control signaling is transmitted in a corresponding control line, the communication signals are transmitted in a corresponding audio line, two lines, namely the control line and the audio line, are needed for completing communication, and the number of the lines is excessive during remote communication, so that line resources are wasted.
For example, civil aviation ground-air communication is an important means for air traffic control departments to communicate with air, command, allocate various flight tasks and ensure flight safety, and is also a necessary way for an airline company to implement aviation management communication and keep command contact with an airplane. The use of civil aviation transmitter needs two emission control lines and two audio frequency lines, respectively transmit control signals and audio signals, and the circuit is too many, which causes resource waste.
Disclosure of Invention
Based on the above, a method for controlling the signal transmission state is provided, aiming at the problem of line resource waste caused by separate transmission of the control signaling and the communication signal.
A method for controlling a signal transmission state, comprising the steps of:
acquiring an in-band signaling switch state signal, a signaling frequency value and a detection threshold value;
if the in-band signaling switch state signal corresponds to an on state, acquiring an audio signal carrying signaling;
identifying signaling in the audio signal according to the signaling frequency value, and calculating the energy value of the signaling;
if the energy value of the signaling is larger than the detection threshold value, the state of transmitting the keying signal is converted into a transmitting state.
The control method of the signal transmitting state comprises the steps of acquiring an audio signal carrying a signaling under the condition that a state signal of an in-band signaling switch corresponds to an opening state, identifying the signaling in the audio signal according to a signaling frequency value and calculating an energy value of the signaling, and converting the state of a transmitting keying signal into a transmitting state if the energy value of the signaling is greater than a detection threshold value; the audio signal carries signaling, and the audio transmission line is shared, so that the function of transmitting the control signal and the communication signal can be completed only by the audio line, the use of the line is reduced, and the resource is saved.
A control apparatus for a signal transmission state, comprising:
the control signal acquisition module is used for acquiring an in-band signaling switch state signal, a signaling frequency value and a detection threshold value;
the audio signal acquisition module is used for acquiring an audio signal carrying the signaling when the in-band signaling switch state signal corresponds to the opening state;
the signaling energy calculation module is used for identifying signaling in the audio signal according to the signaling frequency value and calculating the energy value of the signaling;
and the transmitting state conversion module is used for converting the state of the transmitting keying signal into a transmitting state if the energy value of the signaling is greater than the detection threshold value.
The control device of the signal transmitting state obtains an in-band signaling switch state signal, a signaling frequency value and a detection threshold value through a control signal obtaining module, if the in-band signaling switch state signal corresponds to an open state, the audio signal obtaining module obtains an audio signal carrying a signaling, a signaling energy calculating module identifies the signaling in the audio signal according to the signaling frequency value and calculates the energy value of the signaling, and if the energy value of the signaling is larger than the detection threshold value, a transmitting state converting module converts the state of the transmitting keying signal into the transmitting state; the device carries signaling through the audio signal, shares the audio transmission line to reach and only need the audio line to accomplish the function of transmitting control signal and communication signal, reduce the use of circuit, save the resource.
A computer device comprising a memory and a processor, the memory having stored therein computer readable instructions which, when executed by the processor, cause the processor to carry out the steps of the above method of controlling a signal emission state.
A storage medium storing computer readable instructions which, when executed by one or more processors, cause the one or more processors to perform the steps of the above method of controlling a signal emission state.
The computer equipment and the storage medium for controlling the signal transmitting state share the audio transmission line through the audio signal carrying signaling, so that the functions of transmitting the transmitting control signal and the communication signal can be completed only by the audio line, the use of the line is reduced, and the resources are saved.
Drawings
FIG. 1 is a flow chart of a method for controlling a signal transmission status according to one embodiment;
fig. 2 is a format diagram of an information frame of a Slip serial protocol in one embodiment;
FIG. 3 is a graph of the relationship between the input calibration signal and the sampled digital signal peaks in one embodiment;
FIG. 4 is a programming block diagram of a control method for realizing the signal transmission state by the FPGA in a preferred embodiment;
FIG. 5 is a block diagram of a frequency detection module;
FIG. 6 is a block diagram of a sixth-order IIR band-stop filter implementation;
FIG. 7 is a schematic diagram of a state process of the operation of the frequency detection module based on the Gozell algorithm;
FIG. 8 is a schematic diagram of a state process for controlling the comparison module;
FIG. 9 is a graph of the performance of a VHF radio station;
fig. 10 is a schematic structural diagram of a control device of a signal transmission state according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart of a method for controlling a signal transmission status according to an embodiment of the present invention, where the method for controlling the signal transmission status includes the following steps:
step S101: and acquiring an in-band signaling switch state signal, a signaling frequency value and a detection threshold value.
In this step, the in-band signaling refers to a technique for transmitting signaling using a frequency within the information transmission frequency. The signaling frequency value refers to the frequency value of in-band signaling, wherein one signaling frequency value corresponds to one detection threshold.
Step S102: and if the in-band signaling switch state signal corresponds to the opening state, acquiring an audio signal carrying the signaling.
In this step, an audio signal with signaling from the user side is obtained, wherein the frequency value of the signaling is the frequency value of the signaling in the previous step.
Step S103: and identifying the signaling in the audio signal according to the signaling frequency value, and calculating the energy value of the signaling.
Step S104: if the energy value of the signaling is larger than the detection threshold value, the state of transmitting the keying signal is converted into a transmitting state.
The control method of the signal transmitting state obtains the audio signal carrying the signaling under the corresponding opening state of the in-band signaling switch state signal, identifies the signaling in the audio signal according to the signaling frequency value and calculates the energy value of the signaling, and converts the state of the transmitting keying signal into the transmitting state if the energy value of the signaling is larger than the detection threshold value. The method uses the audio signal carrying signaling to share the audio transmission line, so that the function of transmitting the transmission control signal and the communication signal can be completed only by the audio line, the use of the line is reduced, and the resource is saved.
Optionally, the scheme of the invention can be applied to civil aviation ground-air communication, realizes multiplexing of a control signal control line and an audio signal control line, can complete the control transmission function of a civil aviation transmitter under the condition of not needing the control line, solves the problems of separation of voice and a control signal line and excessive long-distance transmission lines, reduces resource loss, has stable and reliable functions and small detection threshold error, and can be well applied to a civil aviation ground-air communication radio station.
Optionally, the signaling uses a single tone signal.
In one embodiment, the step of obtaining the in-band signaling switch status signal, the signaling frequency value, and the detection threshold value includes the following steps:
and acquiring an in-band signaling switch state signal, a signaling frequency value and a detection threshold value sent by the display control device.
In this embodiment, a user can turn on or turn off an in-band signaling function through the display control device according to specific requirements, select a required signaling frequency value and a detection threshold value corresponding to the signaling frequency value, implement flexible configuration of the signaling frequency and the threshold, have strong versatility, and increase flexibility and adaptability in use of the radio station.
Specifically, the user opens the in-band signaling function through the display control device according to the specific use requirement, and selects the required signaling frequency value and the corresponding detection threshold value. The display control device sends an in-band signaling switch state signal, a signaling frequency value and a detection threshold value through an asynchronous serial port, wherein the protocol format of the serial port can be selected to be a Slip protocol format, the information frame format is shown in figure 2, and the in-band signaling switch state, the signaling frequency value and the detection threshold value are respectively controlled by 1 byte (totally 3 bytes).
In one embodiment, the step of obtaining the detection threshold value includes the following steps:
acquiring a target calibration signal corresponding to the signaling frequency value, and acquiring a target digital signal peak value of the target calibration signal;
calculating a corresponding energy value according to the peak value of the target digital signal;
and storing the energy value corresponding to the peak value of the target digital signal as a detection threshold value.
In the implementation, a target digital signal peak value is obtained through a target calibration signal, an energy value corresponding to the target digital signal peak value is calculated, a detection threshold value is calibrated according to the energy value corresponding to the target digital signal peak value, so that the calibration signal and the detection threshold have a mapping relation, each signaling frequency value corresponds to one calibrated detection threshold value, complex calculated amount is converted into table lookup processing, the calculated amount can be greatly reduced, the implementation difficulty is reduced, and the consumption of resources is reduced.
Specifically, after a calibration signal is acquired, the calibration signal is sampled to obtain a digital signal peak value, an energy value corresponding to the digital signal peak value is obtained through a goertzel algorithm operation, and a detection threshold is calibrated and stored according to the obtained energy value, so that the calibration signal and the detection threshold have a mapping relation, and each signaling frequency value corresponds to a calibrated detection threshold value.
Specifically, taking the implementation of FPGA software as an example, a calibration signal is input to a transmitter, and a digital signal peak value is obtained by sampling the calibration signal through a Chipscope of an FPGA debugging tool, where multiple traversal sampling needs to be performed within an input signal range to be calibrated. And calculating a corresponding energy value by using a Matlab tool to calculate a digital signal peak value by using a Gozel algorithm, storing the energy value serving as a detection threshold in a ROM of the FPGA, and finally enabling a calibration signal in a certain range to have a mapping relation with the detection threshold.
In one embodiment, the step of obtaining the target digital signal peak of the target calibration signal comprises the steps of:
acquiring a plurality of different preset calibration signals, sampling each preset calibration signal to acquire a corresponding digital signal peak value,
performing curve fitting according to each preset calibration signal and the corresponding digital signal peak value to obtain a fitting curve;
and searching a target digital signal peak value of the target calibration signal according to the fitted curve.
In this embodiment, by performing curve fitting on the plurality of calibration signals and the corresponding digital signal peak values, the calibration signals and the digital signal peak values in a certain range can have a mapping relationship, so that all the digital signal peak values in the calibration signal range in the range are obtained. When the target calibration signal is obtained, the digital signal peak value can be quickly obtained from the fitting curve, the corresponding energy value is calculated, and the calculation amount and the realization difficulty are reduced.
Specifically, a calibration signal is input to the transmitter, a digital signal peak value is obtained by sampling the calibration signal, and curve fitting is performed according to the calibration signal and the digital signal peak value.
Let the input calibration signal be U (unit: dBm), and the signal be U when arriving at the front end of the analog-to-digital conversionad(unit: dBm), then:
Uad＝U+G (1)
wherein, G is a multiple of the amplitude of the input calibration signal and the amplitude of the analog-to-digital conversion front-end signal, and G is a constant, that is, the input signal and the analog-to-digital conversion front-end signal should be in a linear relationship.
Let the peak value of the front-end signal of the A/D conversion be VP(unit: V), if the input load is R, then according to the conversion relationship between signal energy and amplitude:
let the A/D conversion number be B and the reference voltage be VrefThen V isPAnd the sampled digital signal peak value VdpThe relationship of (1) is:
and (3) integrating the (2) and the (3), wherein the calibration signal and the digital signal peak have a logarithmic relation. The curve fitting result in this embodiment is shown in fig. 3, where a range of calibration signals has a logarithmic mapping relationship with the digital signal peak. In the embodiment, only the range of signals of 0dBm to-40 dBm is fitted, 14 data are sampled to fit the result, if necessary, the result can be fitted to-60 dBm, but the undersized signals are easily affected by errors of a detection instrument, and the fitting method is not significant in practical application. The method converts the complex calculation amount into the table look-up processing, can greatly reduce the calculation amount, reduce the realization difficulty and reduce the resource consumption.
In one embodiment, the step of calculating the energy value of the signaling comprises the steps of:
and taking the signaling frequency value as a data source, and calculating the energy value of the signaling through a Gozel algorithm.
In this embodiment, the signaling energy is calculated by a Goertzel algorithm, which is a fast fourier transform algorithm, and the corresponding sampling frequency and the number of sampling points are determined according to the frequency of the signal, so as to achieve a full-period sampling, which is beneficial to the periodicity of the twiddle factor in the fourier transform
Therefore, Fourier transform operation is converted into linear filtering operation, and the algorithm is small in calculation amount and high in efficiency.
Specifically, the goertzel algorithm converts the fourier transform operation into a linear filtering operation, and the recursive expression is as follows:
since the formula (5) has a complex multiplier, only energy spectrum and no phase information are needed when detecting the frequency of the signal, and the signal can be squared to obtain a square
Therefore, the input signal is a real sequence, and the energy spectrum can be calculated by completely using real multiplication, so that the complex operation is never avoided. Finally, the energy value that can be signaled is:
|X(k)|2＝|yk(N)|2(7)
in the above formula, x (n) represents a time-domain sampling signal, vk(n) represents the intermediate output result of the linear filtering operation, yk(N) represents the final output result of the linear filtering operation, the number of Fourier transform points N represents the precision of frequency analysis, and the longer the time is required along with the increase of the number of Fourier transform points N, so the number of Fourier transform points N needs to be selected in advance.
k is a certain frequency point in the frequency interval of the number N of fourier transform points, and is a rounded integer, that is, k is 0,1,2, …, N-1. When setting the signaling frequency fkThen, the corresponding k value is k ≈ fkΔ f, where Δ f is the frequency resolution, the number of Fourier changes N, and the sampling frequency fsAnd the frequency resolution Δ f is:
in one embodiment, before the step of calculating the energy value of the signaling, the method further includes the following steps:
acquiring an operation coefficient required by a Gozel algorithm according to different signaling frequency preset values, wherein the operation coefficient comprises Fourier transform points and frequency coefficient calculation factors;
establishing a mapping table according to the relation between different signaling frequency preset values and operation coefficients;
the method comprises the following steps of taking a signaling frequency value as a data source and calculating the energy value of signaling through a Gozel algorithm:
searching a corresponding operation coefficient in a mapping table according to the signaling frequency value;
and calculating the energy value of the signaling through a Gozel algorithm according to the operation coefficient.
In this embodiment, a mapping table from a signaling frequency value to an operation coefficient is established to realize flexible change of the operation coefficient, and when the set signaling frequency value changes, the operation coefficient also changes, so that resource loss in an algorithm is reduced, and the calculation rate is increased.
In particular, in the goertzel algorithm, the signalling frequency fkChanging the precision of frequency analysis to change the value of the Fourier change point N; at the same time, the corresponding k value is changed correspondingly, resulting in the frequency coefficient calculation factor
As well as changes. In the design scheme, energy values of Q possible signaling frequency values need to be detected, and the energy of which frequency value is calculated by setting which signaling frequency value, namely, only one frequency point needs to be calculated each time. Each calculation needs to select the value of the Fourier change point N according to the signaling frequency value and calculate the frequency coefficient calculation factor
Value, consuming a significant amount of computing time and computing resources. The calculation factors of the operation coefficient, the Fourier change point number N value and the calculation frequency coefficient are realized by establishing a mapping table
And the values are flexibly changed, and when the set signaling frequency changes, the corresponding operation coefficient is directly input into the Gozel algorithm, so that the calculation process is greatly simplified, the calculation speed is accelerated, and the resource consumption is reduced.
In one embodiment, the method for controlling the signal transmission state further comprises the following steps:
filtering signaling of the audio signal to obtain the audio signal to be transmitted;
transmitting an audio signal to be transmitted when the transmission keying signal state is a transmission state;
in this embodiment, the signaling component in the audio signal is filtered, and when the transmission key control signal state is the transmission state, the audio signal after the signaling filtering is sent to the post-stage module for audio processing, so as to realize the sending of the signal.
In one embodiment, the step of filtering signaling in the audio signal and obtaining the audio signal to be transmitted includes the following steps:
and filtering signaling in the audio signal by an infinite impulse response digital filter, wherein the parameter of the infinite impulse response digital filter is selected according to the signaling frequency value.
In this embodiment, the signaling of the audio signal is filtered by the infinite impulse response digital filter, and the audio signal after the signaling is filtered is sent to the post-stage module for audio processing, so as to realize the sending of the signal.
Referring to fig. 4, fig. 4 is a programming block diagram of a control method for realizing the signal transmission state by the FPGA in the preferred embodiment. The programming diagram in an embodiment includes a frequency detection module 401 and a filter module 402.
In this embodiment, the control method of the signal emission state may be implemented in an FPGA (Field-Programmable gate array). The FPGA uses modular programming, the scale is large, the integration level is high, the processing speed is high, the execution efficiency is high, the complex sequential logic design can be completed, the programming is flexible, the method is convenient and simple, the repeated programming can be performed for many times, the hardware overhead can be reduced by utilizing the reconfiguration, the method is suitable for the situations of fixed or repeated tasks and the situations of trial prototype and system development, the control method of the signal transmitting state can be based on the existing radio station structure, any hardware is not required to be added, the multiplexing of a control signal control line and an audio signal control line is realized, the control transmitting function of a transmitter can be completed under the situation of not requiring the control line, the problems of the separation of voice and the control signal line and the excessive remote distance transmission line are solved, the resource loss is reduced, the functions are stable and reliable, the detection threshold error is small, and the method can be well.
The frequency detection module 401 includes a fourier transform operation coefficient control module 501, a threshold control module 502, a goertzel algorithm-based frequency detection module 503, and a control comparison module 504, as shown in fig. 5; the filter module 402 includes a cubic cascade of a second order difference equation module 601 and an arithmetic coefficient control module 602 in combination, as shown in fig. 6.
Specifically, the user can turn on or turn off the in-band signaling function, the selected signaling frequency value and the corresponding detection threshold value through the display control device according to specific requirements, and the display control device sends the in-band signaling switch state signal, the signaling frequency value and the detection threshold value to the in-band signaling processing module through the asynchronous serial port. The format used by the asynchronous serial port can be selected to be a Slip protocol format.
And if the in-band signaling switch state signal corresponds to the opening state, the receiver acquires an audio signal carrying the signaling.
The fourier transform operation coefficient control module 501 identifies a signaling carried by an audio signal according to a signaling frequency value, searches a corresponding fourier transform operation coefficient in a mapping table according to the signaling frequency value, and sends the fourier transform operation coefficient to the frequency detection module 503 based on the goertzel algorithm to calculate a signaling energy value, wherein a calculation state process of the frequency detection module 503 based on the goertzel algorithm is as shown in fig. 7:
the state machine 701 of the difference equation implements the following operation process, and the specific operation formula is:
the module occupies a multiplier. Wherein,
decimal in theory, and enlarged in particular implementation 215The multiples are converted into integers and then stored, so that the operation in the FPGA is facilitated, and the quantization error can be reduced. Multiplier output reduction 215So as to balance the output range and eliminate the influence of quantization gain.
The state machine 702 of the energy spectrum implements the following operations:
the module occupies two multipliers, one is used for calculating the square, the multiplexing is carried out twice, and the calculation is carried out
And
another for calculating
The threshold control module 502 sends a detection threshold value to the control comparison module 504, and the control comparison module 504 compares the energy value calculated by the frequency detection module 503 based on the goertzel algorithm with a corresponding threshold value, and the state process is as shown in fig. 8, when the in-band signaling switch state signal corresponds to an on state, the state is switched from an idle state 801 to a state 802 of starting goertzel operation, and then to a state 803 of waiting for the completion of processing, and when the flag indicating the completion of processing arrives, the state is switched to a state 804 of comparing the threshold value and outputting the result. And then entering the next energy calculation period, calculating the in-band signaling energy value in real time, and acquiring the state change of the transmission keying signal.
In the filter module 402, a second order difference equation sub-module 601 and an operation coefficient control module 602 implement a sixth order infinite impulse response digital band rejection filter.
The second order difference equation submodule 601 is used to calculate the following formula:
a0×y(n)+a1×y(n-1)+a2×y(n-2)＝b0×x(n)+b1×x(n-1)+b2×x(n-2) (10)
wherein a is0、a1、a2、b0、b1、b2For the operation coefficients, x (n), x (n-1), x (n-2) are the signal inputs and their delays, and y (n), y (n-1), y (n-2) are the signal outputs and their delays. In the IIR digital filter implementation of the present embodiment, a0＝b0＝b2＝1。
The operation coefficient control module 602 is used to control the operation coefficient of the second order difference equation, and select the corresponding filter coefficient according to the signaling frequency, so that the versatility is strong, and a higher order even infinite impulse response digital filter can be designed by using the operation coefficient control module.
Fig. 9 shows an index test chart of a vhf station in this embodiment. It can be seen from the figure that the present embodiment functions normally in practical application, the error is not greater than 1dB within the detection threshold range of 0 to 40dBm, and meanwhile, the configuration of signaling frequency can be modified or increased by DFT point control, operation coefficient control (401) in fig. 4 and three operation coefficient control in fig. 8, and the versatility is strong.
According to the above method for controlling the signal transmission status, the present invention further provides a control device for the signal transmission status, and the following describes an embodiment of the control device for the signal transmission status in detail.
Fig. 10 is a schematic structural diagram of a control device for signal transmission status according to an embodiment of the present invention. The control device of the signal transmission state in this embodiment includes:
a control signal obtaining module 901, configured to obtain an in-band signaling switch state signal, a signaling frequency value, and a detection threshold value;
an audio signal obtaining module 902, configured to obtain an audio signal carrying a signaling when the in-band signaling switch state signal corresponds to an on state;
a signaling energy calculation module 903, configured to identify a signaling in the audio signal according to the signaling frequency value, and calculate an energy value of the signaling;
a transmission state conversion module 904, configured to convert the state of the transmission key signal into a transmission state if the energy value of the signaling is greater than the detection threshold value.
The control device of the signal transmitting state obtains an in-band signaling switch state signal, a signaling frequency value and a detection threshold value through a control signal obtaining module, if the in-band signaling switch state signal corresponds to an open state, the audio signal obtaining module obtains an audio signal carrying a signaling, a signaling energy calculating module identifies the signaling in the audio signal according to the signaling frequency value and calculates the energy value of the signaling, and if the energy value of the signaling is larger than the detection threshold value, a transmitting state converting module converts the state of the transmitting keying signal into the transmitting state; the device carries signaling through the audio signal, shares the audio transmission line to reach and only need the audio line to accomplish the function of transmitting control signal and communication signal, reduce the use of circuit, save the resource.
In one embodiment, the control signal obtaining module 901 obtains an in-band signaling switch state signal, a signaling frequency value, and a detection threshold value sent by the display control apparatus.
In one embodiment, the control signal obtaining module 901 obtains a target calibration signal corresponding to the signaling frequency value, and obtains a target digital signal peak value of the target calibration signal; calculating a corresponding energy value according to the peak value of the target digital signal; and storing the energy value corresponding to the peak value of the target digital signal as a detection threshold value.
In one embodiment, the control signal obtaining module 901 obtains a plurality of different preset calibration signals, samples each preset calibration signal to obtain a corresponding digital signal peak value, and performs curve fitting according to each preset calibration signal and the corresponding digital signal peak value to obtain a fitting curve; and searching a target digital signal peak value of the target calibration signal according to the fitting curve.
In one embodiment, the signaling energy calculation module 903 calculates the energy value of the signaling through a goertzel algorithm using the signaling frequency value as a data source.
In one embodiment, the signaling energy calculation module 903 obtains an operation coefficient required by the goertzel algorithm according to different signaling frequency preset values, where the operation coefficient includes a fourier transform point number and a frequency coefficient calculation factor; establishing a mapping table according to the relation between different signaling frequency preset values and operation coefficients; searching a corresponding operation coefficient in a mapping table according to the signaling frequency value; and calculating the energy value of the signaling through a Gozel algorithm according to the operation coefficient.
In one embodiment, the transmitting state converting module 904 filters signaling in the audio signal to obtain an audio signal to be transmitted; and transmitting the audio signal to be transmitted when the state of the transmission keying signal is the transmission state.
The technical features and advantages described in the embodiments of the signal transmission state control method are applicable to the embodiments of the signal transmission state control device, and thus it is stated that the signal transmission state control device and the signal transmission state control method of the present invention correspond to each other one to one.
The present invention also provides a computer device, including a memory and a processor, where the memory stores computer readable instructions, and the computer readable instructions, when executed by the processor, cause the processor to execute the steps of the method for controlling a signal transmission state according to any of the above embodiments.
The present invention is a storage medium storing computer readable instructions which, when executed by one or more processors, cause the one or more processors to perform the steps of the method for controlling a signal transmission state of any of the above embodiments.
The method executed in the computer device and the readable storage medium is the same as the method for controlling the signal transmission state in the above embodiment, and the method comprises the steps of acquiring an audio signal carrying a signaling in a state that a state signal of an in-band signaling switch corresponds to an on state, identifying the signaling in the audio signal according to a signaling frequency value and calculating an energy value of the signaling, and if the energy value of the signaling is greater than a detection threshold value, converting the state of transmitting a keying signal into the transmission state; the audio signal carries signaling, and the audio transmission line is shared, so that the function of transmitting the control signal and the communication signal can be completed only by the audio line, the use of the line is reduced, and the resource is saved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A method for controlling a signal transmission state, comprising the steps of:
acquiring an in-band signaling switch state signal, a signaling frequency value and a detection threshold value;
if the in-band signaling switch state signal corresponds to an on state, acquiring an audio signal carrying a signaling;
identifying signaling in the audio signal according to the signaling frequency value, and calculating an energy value of the signaling;
and if the energy value of the signaling is larger than the detection threshold value, converting the state of the emission keying signal into an emission state, wherein the emission keying signal is used for judging whether the audio signal is emitted or not.
2. The method of claim 1, wherein the step of obtaining the in-band signaling switch status signal, the signaling frequency value, and the detection threshold value comprises the steps of:
and acquiring an in-band signaling switch state signal, a signaling frequency value and a detection threshold value sent by the display control device.
3. The method for controlling signal transmission status according to claim 1, wherein the step of obtaining the detection threshold value comprises the steps of:
acquiring a target calibration signal corresponding to the signaling frequency value, and acquiring a target digital signal peak value of the target calibration signal;
calculating a corresponding energy value according to the peak value of the target digital signal;
and storing the energy value corresponding to the peak value of the target digital signal as a detection threshold value.
4. The method of claim 3, wherein the step of obtaining the target digital signal peak value of the target calibration signal comprises the steps of:
acquiring a plurality of different preset calibration signals, sampling each preset calibration signal, and acquiring a corresponding digital signal peak value;
performing curve fitting according to each preset calibration signal and the corresponding digital signal peak value to obtain a fitting curve;
and searching a target digital signal peak value of the target calibration signal according to the fitted curve.
5. The method of claim 1, wherein the step of calculating the energy value of the signaling comprises the steps of:
and calculating the energy value of the signaling by using the signaling frequency value as a data source through a Gozel algorithm.
6. The method of claim 5, wherein the step of calculating the energy value of the signaling is preceded by the steps of:
acquiring an operation coefficient required by a Gozel algorithm according to different signaling frequency preset values, wherein the operation coefficient comprises Fourier transform points and frequency coefficient calculation factors;
establishing a mapping table according to the relation between different signaling frequency preset values and operation coefficients;
the step of calculating the energy value of the signaling by using the signaling frequency value as a data source through a Gozel algorithm comprises the following steps:
searching a corresponding operation coefficient in the mapping table according to the signaling frequency value;
and calculating the energy value of the signaling through a Gozel algorithm according to the operation coefficient.
7. The method for controlling a signal transmission status according to claim 1, further comprising the steps of:
filtering signaling in the audio signal to obtain an audio signal to be transmitted;
and when the transmission keying signal state is a transmission state, transmitting the audio signal to be transmitted.
8. The method for controlling signal transmission status according to claim 7, wherein the step of filtering the signaling in the audio signal and obtaining the audio signal to be transmitted comprises the steps of:
and filtering signaling in the audio signal by an infinite impulse response digital filter, wherein the parameter of the infinite impulse response digital filter is selected according to the signaling frequency value.
9. A control apparatus for a signal transmission state, comprising:
the control signal acquisition module is used for acquiring an in-band signaling switch state signal, a signaling frequency value and a detection threshold value;
the audio signal acquisition module is used for acquiring an audio signal carrying a signaling when the in-band signaling switch state signal corresponds to an on state;
the signaling energy calculation module is used for identifying signaling in the audio signal according to the signaling frequency value and calculating the energy value of the signaling;
and the transmitting state conversion module is used for converting the state of the transmitting keying signal into the transmitting state if the energy value of the signaling is greater than the detection threshold value, wherein the transmitting keying signal is used for judging whether the audio signal is transmitted or not.
10. A computer device comprising a memory and a processor, the memory storing a computer program executable by the processor to implement the steps of the method of controlling a signal emission state of any one of claims 1 to 8.
11. A computer-readable medium storing a computer program executable by a processor to implement the steps of the method of controlling a signal emission status of any one of claims 1 to 8.
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