CN116033313A - Variable sampling rate audio data acquisition method, device and system for aerospace telemetry - Google Patents
Variable sampling rate audio data acquisition method, device and system for aerospace telemetry Download PDFInfo
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Abstract
The embodiment of the invention provides a variable sampling rate audio data acquisition method, device and system for aerospace telemetry, wherein the acquisition method comprises the following steps: collecting an audio pulse modulation signal in real time at a first sampling rate to obtain an original audio pulse modulation signal; caching the original audio pulse modulation signals acquired in a period of time; acquiring specific peripheral signals on the rocket body in real time, and controlling buffered original audio pulse modulation signals to be output in a first sampling rate or a second sampling rate according to whether the specific peripheral signals are acquired or not to obtain audio pulse modulation signals; wherein the second sampling rate is less than the first sampling rate; and encoding the audio pulse modulation signal to obtain encoded data, and transmitting the encoded data to audio receiving terminal equipment. The invention can increase the audio content and reduce the audio distortion degree under the condition of maintaining the average code rate of the original audio by increasing the data buffer, thereby improving the sound transmission efficiency of the telemetry system.
Description
Technical Field
The invention relates to the technical field of audio data processing, in particular to a variable sampling rate audio data acquisition method, device and system for aerospace telemetry.
Background
The data transmitted by the aerospace telemetry system comprises real-time audio information acquired from an audio sensor on a rocket body, and the audio sensor acquires belief information of a key part according to the requirement of a launching task and sends the belief information to ground receiving equipment for storage and playing through the telemetry system.
In the prior art, a telemetry audio acquisition system of a space system is similar to a general audio live broadcast system, and comprises five processes of real-time acquisition, encoding, transmission, decoding, playing and storing.
Disclosure of Invention
In view of this, an embodiment of the present invention is to provide a method, an apparatus, and a system for acquiring audio data with variable sampling rate for space telemetry, so as to solve the technical problems in the prior art that the link bandwidth of the telemetry system limits the code rate for acquiring audio content, which results in that the sampling rate of the audio content is difficult to be increased again after reaching a certain standard, resulting in a greater degree of audio distortion after parsing, and the sound transmission efficiency of the telemetry system is lower.
In order to achieve the above objective, in a first aspect, an embodiment of the present invention provides a variable sampling rate audio data acquisition method for space telemetry, which is applied to an audio acquisition terminal device, where the acquisition method includes:
collecting an audio pulse modulation signal in real time at a first sampling rate to obtain an original audio pulse modulation signal;
caching the original audio pulse modulation signals acquired in a period of time;
acquiring specific peripheral signals on a rocket body in real time, and controlling buffered original audio pulse modulation signals to be output in a first sampling rate or a second sampling rate according to whether the specific peripheral signals are acquired or not to obtain audio pulse modulation signals; wherein the second sampling rate is less than the first sampling rate;
and encoding the audio pulse modulation signal to obtain encoded data, and transmitting the encoded data to audio receiving terminal equipment.
In some possible embodiments, the real-time acquisition of the specific peripheral signal on the rocket body controls the buffered original audio pulse modulation signal to be output in the form of a first sampling rate or a second sampling rate according to whether the specific peripheral signal is acquired or not, and specifically includes:
When the specific peripheral signal is not acquired, resampling the buffered original audio pulse modulation signal in a form of a second sampling rate to obtain an audio pulse modulation signal of the second sampling rate and outputting the audio pulse modulation signal;
and when the specific peripheral signal is acquired, maintaining the form of the first sampling rate to output the cached original audio pulse modulation signal.
In a second aspect, an embodiment of the present invention provides a variable sampling rate audio data acquisition method for space telemetry, applied to an audio receiving end device, where the acquisition method includes:
receiving encoded data, and decoding the encoded data to obtain an audio pulse modulation signal;
judging whether the audio pulse modulation signal is an audio pulse modulation signal with a first sampling rate or an audio pulse modulation signal with a second sampling rate;
when the audio pulse modulation signal is determined to be the audio pulse modulation signal with the second sampling rate, interpolation processing is carried out on the audio pulse modulation signal with the second sampling rate, and a continuous audio pulse modulation signal is obtained;
and storing and playing the continuous audio pulse modulation signal.
In some possible embodiments, the acquisition method further comprises:
When the audio pulse modulation signal is determined to be the audio pulse modulation signal with the first sampling rate, the audio pulse modulation signal with the first sampling rate is directly stored and played.
In some possible embodiments, the determining whether the audio pulse modulated signal is an audio pulse modulated signal with a first sampling rate or an audio pulse modulated signal with a second sampling rate specifically includes:
acquiring a play time stamp of the audio pulse modulation signal, and calculating the sampling rate of the original audio pulse modulation signal according to the time stamp;
comparing the sampling rate of the decoded audio pulse modulation signal with the sampling rate of the original audio pulse modulation signal;
when the sampling rate of the decoded audio pulse modulation signal is lower than that of the original audio pulse modulation signal, determining that the decoded audio pulse modulation signal is an audio pulse modulation signal with a second sampling rate; when the sampling rate of the decoded audio pulse modulation signal is equal to the sampling rate of the original audio pulse modulation signal, determining that the decoded audio pulse modulation signal is an audio pulse modulation signal with a first sampling rate.
In some possible embodiments, when the audio pulse modulated signal is determined to be an audio pulse modulated signal with a second sampling rate, interpolation processing is performed on the audio pulse modulated signal with the second sampling rate to obtain a continuous audio pulse modulated signal, which specifically includes:
And restoring the audio pulse modulation signal with the second sampling rate to the same sampling rate as the original audio pulse modulation signal by adopting a linear interpolation mode to obtain a continuous audio pulse modulation signal.
In a third aspect, an embodiment of the present invention provides a variable sampling rate audio data acquisition device for space telemetry, applied to an audio acquisition device, where the acquisition device includes:
the acquisition unit is used for acquiring the audio pulse modulation signal in real time at a first sampling rate to obtain an original audio pulse modulation signal;
the audio buffer is used for buffering the original audio pulse modulation signals acquired in a period of time;
the peripheral signal processing unit is used for acquiring specific peripheral signals on the rocket body in real time, and controlling the buffered original audio pulse modulation signals to be output in a first sampling rate or a second sampling rate according to whether the specific peripheral signals are acquired or not so as to obtain audio pulse modulation signals;
and the coding and transmitting unit is used for coding the audio pulse modulation signal to obtain coded data and transmitting the coded data to audio receiving end equipment.
In some possible embodiments, the peripheral signal processing unit is specifically configured to:
When the specific peripheral signal is not acquired, resampling the buffered original audio pulse modulation signal in a form of a second sampling rate to obtain an audio pulse modulation signal of the second sampling rate and outputting the audio pulse modulation signal;
and when the specific peripheral signal is acquired, maintaining the form of the first sampling rate to output the cached original audio pulse modulation signal.
In a fourth aspect, an embodiment of the present invention provides a variable sampling rate audio data acquisition device for space telemetry, applied to an audio receiving end device, where the acquisition device includes:
the receiving and decoding unit is used for receiving the coded data, and decoding the coded data to obtain an audio pulse modulation signal;
a judging unit, configured to judge whether the audio pulse modulated signal is an audio pulse modulated signal with a first sampling rate or an audio pulse modulated signal with a second sampling rate;
the difference processing unit is used for carrying out interpolation processing on the audio pulse modulation signal with the second sampling rate to obtain a continuous audio pulse modulation signal when the audio pulse modulation signal is judged to be the audio pulse modulation signal with the second sampling rate;
and the storage and playing unit is used for storing and playing the continuous audio pulse modulation signals.
In some possible embodiments, the storage and playback unit is further configured to:
when the audio pulse modulation signal is judged to be the audio pulse modulation signal with the first sampling rate, the audio pulse modulation signal with the first sampling rate is directly stored and played.
In some possible embodiments, the determining unit includes:
the acquisition and calculation subunit is used for acquiring the playing time stamp of the audio pulse modulation signal and calculating the sampling rate of the original audio pulse modulation signal according to the time stamp;
a comparing subunit, configured to compare a sampling rate of the decoded audio pulse modulated signal with a sampling rate of the original audio pulse modulated signal;
a determining subunit, configured to determine that the decoded audio pulse modulated signal is an audio pulse modulated signal with a second sampling rate when the sampling rate of the decoded audio pulse modulated signal is lower than the sampling rate of the original audio pulse modulated signal; when the sampling rate of the decoded audio pulse modulation signal is equal to the sampling rate of the original audio pulse modulation signal, determining that the decoded audio pulse modulation signal is an audio pulse modulation signal with a first sampling rate.
In some possible embodiments, the difference processing unit is specifically configured to:
and restoring the audio pulse modulation signal with the second sampling rate to the same sampling rate as the original audio pulse modulation signal by adopting a linear interpolation mode to obtain a continuous audio pulse modulation signal.
In a fifth aspect, an embodiment of the present invention provides a variable sampling rate audio data acquisition system for space telemetry, including an audio acquisition end device and an audio receiving end device;
the audio acquisition end device is used for acquiring the audio pulse modulation signal in real time at a first sampling rate to obtain an original audio pulse modulation signal; caching the original audio pulse modulation signals acquired in a period of time; acquiring specific peripheral signals on a rocket body in real time, and controlling buffered original audio pulse modulation signals to be output in a first sampling rate or a second sampling rate according to whether the specific peripheral signals are acquired or not to obtain audio pulse modulation signals; encoding the audio pulse modulation signal to obtain encoded data, and transmitting the encoded data to audio receiving terminal equipment;
the audio receiving end device is used for receiving the coded data, decoding the coded data and obtaining an audio pulse modulation signal; judging whether the audio pulse modulation signal is an audio pulse modulation signal with a first sampling rate or an audio pulse modulation signal with a second sampling rate; when the audio pulse modulation signal is judged to be the audio pulse modulation signal with the second sampling rate, interpolation processing is carried out on the audio pulse modulation signal with the second sampling rate, and a continuous audio pulse modulation signal is obtained; and storing and playing the continuous audio pulse modulation signal.
In a sixth aspect, embodiments of the present invention provide a computer readable storage medium having a computer program stored thereon, which when executed by a processor, implements a variable sample rate audio data acquisition method such as any of the above-described space telemetry methods.
In a seventh aspect, an embodiment of the present invention provides an electronic device, including:
a processor;
a memory for storing the processor-executable instructions;
the processor is configured to execute the instructions to implement any of the variable sample rate audio data acquisition methods of space telemetry.
The technical scheme has the following beneficial effects:
the invention provides a variable sampling rate audio data acquisition method, device and system for aerospace telemetry, wherein the acquisition method comprises the following steps: collecting an audio pulse modulation signal in real time at a first sampling rate to obtain an original audio pulse modulation signal; caching the original audio pulse modulation signals acquired in a period of time; acquiring specific peripheral signals on the rocket body in real time, and controlling buffered original audio pulse modulation signals to be output in a first sampling rate or a second sampling rate according to whether the specific peripheral signals are acquired or not to obtain audio pulse modulation signals; wherein the second sampling rate is less than the first sampling rate; and encoding the audio pulse modulation signal to obtain encoded data, and transmitting the encoded data to audio receiving terminal equipment. According to the embodiment of the invention, by adding the data buffer, the audio content can be increased and the audio distortion degree can be reduced under the condition of maintaining the average code rate of the original audio, so that the sound transmission efficiency of a telemetry system can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a variable sample rate audio data acquisition method for use in space telemetry of an audio acquisition end device in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a variable sampling rate audio acquisition transmission process according to an embodiment of the present invention;
FIG. 3 is a flow chart of a variable sample rate audio data acquisition method for use in space telemetry of an audio receiving end device in accordance with an embodiment of the present invention;
FIG. 4 is a block diagram of a variable sample rate audio data acquisition device for use in space telemetry of audio acquisition end devices according to an embodiment of the present invention;
FIG. 5 is a block diagram of a variable sample rate audio data acquisition device for use in space telemetry of audio receiving end equipment according to an embodiment of the present invention;
FIG. 6 is a block diagram of a variable sample rate audio data acquisition system for space telemetry in accordance with an embodiment of the present invention;
FIG. 7 is a functional block diagram of a computer-readable storage medium according to an embodiment of the present invention;
fig. 8 is a functional block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Fig. 1 is a flowchart of a variable sampling rate audio data acquisition method applied to space telemetry of an audio acquisition end device according to an embodiment of the present invention, and fig. 2 is a schematic diagram of a variable sampling rate audio acquisition and transmission process according to an embodiment of the present invention, where the acquisition method includes:
step S11, acquiring an audio pulse modulation signal in real time at a first sampling rate to obtain an original audio pulse modulation signal;
Step S12, buffering an original audio pulse modulation signal acquired in a period of time;
step S13, acquiring specific peripheral signals on the rocket body in real time, and controlling buffered original audio pulse modulation signals to be output in a first sampling rate or a second sampling rate according to whether the specific peripheral signals are acquired or not to obtain audio pulse modulation signals; wherein the second sampling rate is less than the first sampling rate;
step S14, the audio pulse modulation signal is encoded to obtain encoded data, and the encoded data is transmitted to an audio receiving terminal device.
In this embodiment, the audio sensor inputs the audio PCM (PulseCode Modulation, pulse code modulation signal) data collected in real time at the first sampling rate to the audio PCM buffer, where the data of the last period of time (for example, 1 second) is buffered, and the processing is delayed by 1 second, i.e., the audio PCM buffer stores the PCM data of the audio at the first sampling rate collected in a period of time.
As shown in figure 2, specific peripheral signals on a rocket body are acquired in real time through a peripheral signal processor, the specific peripheral signals are from equipment such as an inertial unit, a gyroscope, a vibration sensor, an initiating explosive device or an engine valve, the peripheral signal processor can judge whether specific flight conditions exist in the rocket in the flight process according to the working conditions of the equipment, for example, the situation that a program turns can obtain large change of attitude angles from the inertial unit or the gyroscope, signals can be acquired from the separated initiating explosive device when rocket stages are separated, signals can be acquired from the engine valve when the engine takes off or the situation that the engine needs to be closed before the rocket is in orbit, and the like signals are special events which need special attention when the acquisition of audio signals, and the audio buffer is controlled to output PCM audio sampling data to the back equipment according to whether the peripheral signal processor acquires the specific signals or not. In this embodiment, the peripheral signal obtained by the peripheral signal processor is real-time, and has no delay, and the audio PCM buffer sends the buffered audio to the subsequent processing link according to the need according to the judgment of the peripheral signal processor.
In the embodiment of the invention, the audio frequency PCM buffer area is added to buffer the audio frequency data within a period of time, and the audio frequency data with different sampling rates are output according to different peripheral signals, so that the audio frequency content can be increased and the audio frequency distortion degree can be reduced under the condition of maintaining the original audio frequency average code rate, thereby improving the sound transmission efficiency of a telemetry system.
In some embodiments, as shown in fig. 2, the peripheral signal processor collects specific peripheral signals on the rocket body in real time, and controls the buffered original audio pulse modulation signal to be output in the form of a first sampling rate or a second sampling rate according to whether the specific peripheral signals are collected or not, which specifically includes: resampling the buffered original audio pulse modulated signal in the form of a second sampling rate (e.g., a low sampling rate of 8 kHz) when the specific peripheral signal is not acquired, obtaining an audio pulse modulated signal of the second sampling rate and outputting the audio pulse modulated signal; in other words, in the stable flight phase of the rocket, the collected audio does not need to collect and transmit audio signals in a high sampling rate mode because of no strong working condition change, and at the moment, the audio resampling module resamples the buffered audio data signals to the audio in a low sampling rate (for example, 8 kHz) mode so as to reduce the code rate of audio data transmission and further save more bandwidth.
When a specific peripheral signal is acquired, the buffered original audio pulse modulation signal is output in a form of maintaining a first sampling rate. I.e. the peripheral signal processor has acquired a strong change in the peripheral signal, the audio data in the buffer needs to be kept all at the first sampling rate (e.g. the high sampling rate of 90 kHz) for subsequent flows, which can consistently keep the high sampling rate of 90kHz until the last play-and-store process.
According to the embodiment of the invention, the audio PCM buffer is added after audio sampling and is used for buffering a certain amount of audio, and the previous audio frame is continuously sent to the subsequent equipment in a high sampling rate mode only when the peripheral signal processor finds a special peripheral signal. In this embodiment, an audio data signal with a high sampling rate (e.g., 90 kHz) may be transmitted in a telemetry transmission channel that is capable of transmitting only low sampling rate (e.g., 44.1 kHz) audio data.
Example two
Fig. 3 is a flowchart of a variable sampling rate audio data acquisition method applied to space telemetry of an audio receiving end device according to an embodiment of the present invention, as shown in fig. 2 and 3, the acquisition method includes:
s21, receiving the coded data, and decoding the coded data to obtain an audio pulse modulation signal;
Step S22, judging whether the audio pulse modulation signal is the audio pulse modulation signal with the first sampling rate or the audio pulse modulation signal with the second sampling rate;
step S23, when the audio pulse modulation signal is determined to be the audio pulse modulation signal with the second sampling rate, interpolation processing is carried out on the audio pulse modulation signal with the second sampling rate, and a continuous audio pulse modulation signal is obtained;
step S24, the continuous audio pulse modulation signal is stored and played.
Specifically, as shown in fig. 2, after receiving the encoded data, decoding the encoded data by an audio decoder to obtain a decoded audio PCM, determining whether the audio PCM has a first sampling rate or a second sampling rate when the audio PCM has a sampling rate, and when determining that the audio pulse modulated signal is an audio pulse modulated signal with the second sampling rate, interpolating the audio pulse modulated signal with the second sampling rate by an audio interpolator to restore the number of the audio pulse modulated signals to the original number of the audio pulse modulated signals, that is, the omitted audio needs to be supplemented by a linear interpolation algorithm, and then filtered and amplified and submitted to an audio storage or playing device so that the audio storage or playing device can smoothly play. The interpolation process may be a linear interpolation of the amplitude of the audio data in the time domain, for example, the amplitude is 9 when the amplitude is 1.1 seconds and the amplitude is 0.9 seconds, and then a straight line with a slope of 10 changes in the time period from 0.1 to 0.9.
In addition, when the audio pulse modulation signal is judged to be the audio pulse modulation signal with the first sampling rate, the audio pulse modulation signal with the first sampling rate is directly stored and played. At this time, the audio pulse modulation signal is the original collected audio pulse modulation signal, and the process can be played without difference processing.
In some embodiments, determining whether the audio pulse modulated signal is an audio pulse modulated signal at a first sampling rate or an audio pulse modulated signal at a second sampling rate specifically includes:
acquiring a play time stamp of the audio pulse modulation signal, and calculating the sampling rate of the original audio pulse modulation signal according to the time stamp; the time stamp represents a time point when an image or an audio segment is acquired, for example, the acquisition time of the audio pulse signal a is 3.1 seconds, the acquisition time of the audio pulse signal a+1 is 3.2 seconds, and the sampling rate is 1/(3.2-3.1) =1/0.1=10 segments/second, which means that 10 audio pulse signals are acquired for 1 second. After the sampling rate is calculated, comparing the sampling rate of the decoded audio pulse modulation signal with the sampling rate of the original audio pulse modulation signal; when the sampling rate of the decoded audio pulse modulation signal is lower than that of the original audio pulse modulation signal, determining that the decoded audio pulse modulation signal is an audio pulse modulation signal with a second sampling rate; when the sampling rate of the decoded audio pulse modulated signal is equal to the sampling rate of the original audio pulse modulated signal, determining the decoded audio pulse modulated signal as an audio pulse modulated signal of a first sampling rate.
When the sampling rate of the decoded audio pulse signal is determined to be low, the audio pulse modulation signal with the low sampling rate needs to be restored to the same sampling rate as the original audio pulse modulation signal by adopting a linear interpolation mode, namely, the omitted audio is complemented, and the audio pulse signal with the high sampling rate is restored to the original audio signal with the high sampling rate, for example, the audio pulse signal with the sampling rate of 8kHz is changed into the audio pulse signal with the frequency of 90kHz after being subjected to the linear interpolation, so that the continuous audio pulse modulation signal is obtained.
The embodiment of the invention can transmit the audio data with high sampling rate in a telemetry transmission channel which can only transmit the audio data with low sampling rate.
Example III
Fig. 4 is a block diagram of a variable sampling rate audio data acquisition device applied to space telemetry of an audio acquisition terminal device according to an embodiment of the present invention, and as shown in fig. 4, the acquisition device 100 includes:
an acquisition unit 101, configured to acquire an audio pulse modulation signal in real time at a first sampling rate, and obtain an original audio pulse modulation signal;
the audio buffer 102 is configured to buffer an original audio pulse modulation signal acquired in a period of time;
the peripheral signal processing unit 103 is configured to collect a specific peripheral signal on the rocket body in real time, and control the buffered original audio pulse modulation signal to be output in a form of a first sampling rate or a second sampling rate according to whether the specific peripheral signal is collected, so as to obtain an audio pulse modulation signal;
The encoding and transmitting unit 104 is configured to encode the audio pulse modulated signal to obtain encoded data, and transmit the encoded data to an audio receiving end device.
In some embodiments, the peripheral signal processing unit 103 may be a peripheral signal processor, which is specifically configured to: when the specific peripheral signal is not acquired, resampling the buffered original audio pulse modulation signal in a second sampling rate form to obtain an audio pulse modulation signal with the second sampling rate and outputting the audio pulse modulation signal; when a specific peripheral signal is acquired, the buffered original audio pulse modulation signal is output in a form of maintaining a first sampling rate.
For details, please refer to the method embodiment shown in fig. 1 and 2.
Example IV
Fig. 5 is a block diagram of a variable sampling rate audio data acquisition device applied to space telemetry of an audio receiving end device according to an embodiment of the present invention, and as shown in fig. 5, the acquisition device 200 includes:
a receiving and decoding unit 201, configured to receive encoded data, and decode the encoded data to obtain an audio pulse modulation signal;
a judging unit 202, configured to judge whether the audio pulse modulated signal is an audio pulse modulated signal with a first sampling rate or an audio pulse modulated signal with a second sampling rate;
A difference processing unit 203, configured to, when determining that the audio pulse modulated signal is an audio pulse modulated signal with a second sampling rate, perform interpolation processing on the audio pulse modulated signal with the second sampling rate to obtain a continuous audio pulse modulated signal;
a storage and playback unit 204 for storing and playing back the continuous audio pulse modulated signal.
The storage and playback unit 204 is further configured to: when the audio pulse modulation signal is judged to be the audio pulse modulation signal with the first sampling rate, the audio pulse modulation signal with the first sampling rate is directly stored and played.
In some embodiments, the determining unit 202 includes:
the acquisition and calculation subunit is used for acquiring the playing time stamp of the audio pulse modulation signal and calculating the sampling rate of the original audio pulse modulation signal according to the time stamp;
a comparison subunit, configured to compare the sampling rate of the decoded audio pulse modulated signal with the sampling rate of the original audio pulse modulated signal;
a determining subunit, configured to determine that the decoded audio pulse modulated signal is an audio pulse modulated signal with a second sampling rate when the sampling rate of the decoded audio pulse modulated signal is lower than the sampling rate of the original audio pulse modulated signal; when the sampling rate of the decoded audio pulse modulated signal is equal to the sampling rate of the original audio pulse modulated signal, determining the decoded audio pulse modulated signal as an audio pulse modulated signal of a first sampling rate.
In some embodiments, the difference processing unit 203 is specifically configured to:
and restoring the audio pulse modulation signal with the second sampling rate to the same sampling rate as the original audio pulse modulation signal by adopting a linear interpolation mode to obtain a continuous audio pulse modulation signal.
For details, please refer to the method embodiment shown in fig. 2 and 3.
Example five
FIG. 6 is a block diagram of a variable sample rate audio data acquisition system for space telemetry, according to an embodiment of the invention, as shown in FIG. 6, the acquisition system 300 comprising: the audio acquisition side device 100 and the audio reception side device 200, wherein,
the audio acquisition end device 100 is configured to acquire an audio pulse modulation signal in real time at a first sampling rate, and obtain an original audio pulse modulation signal; caching the original audio pulse modulation signals acquired in a period of time; acquiring specific peripheral signals on the rocket body in real time, and controlling buffered original audio pulse modulation signals to be output in a first sampling rate or a second sampling rate according to whether the specific peripheral signals are acquired or not to obtain audio pulse modulation signals; encoding the audio pulse modulation signal to obtain encoded data, and transmitting the encoded data to audio receiving terminal equipment;
The audio receiving end device 200 is configured to receive the encoded data, decode the encoded data, and obtain an audio pulse modulation signal; judging whether the audio pulse modulation signal is an audio pulse modulation signal with a first sampling rate or an audio pulse modulation signal with a second sampling rate; when the audio pulse modulation signal is judged to be the audio pulse modulation signal with the second sampling rate, interpolation processing is carried out on the audio pulse modulation signal with the second sampling rate, and a continuous audio pulse modulation signal is obtained; the continuous audio pulse modulated signal is stored and played.
For specific details, reference is made to the method embodiments shown in fig. 1 to 3.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present invention. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
Example six
Fig. 7 is a functional block diagram of a computer-readable storage medium according to an embodiment of the present invention. As shown in fig. 7, the embodiment of the present invention further provides a computer readable storage medium 400, where the computer readable storage medium 400 stores a computer program 410, and when the computer program 410 is executed by a processor, a variable sampling rate audio data acquisition method for space telemetry is implemented.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. Of course, there are other ways of readable storage medium, such as quantum memory, graphene memory, etc. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
Example IV
Fig. 8 is a functional block diagram of an electronic device according to an embodiment of the present invention. The embodiment of the invention also provides an electronic device, referring to fig. 8, and the electronic device comprises a processor, and optionally an internal bus, a network interface and a memory at a hardware level. The Memory may include a Memory, such as a Random-Access Memory (RAM), and may further include a non-volatile Memory (non-volatile Memory), such as at least 1 disk Memory. Of course, the electronic device may also include hardware required for other services.
The processor, network interface, and memory may be interconnected by an internal bus, which may be an industry standard architecture ISA bus, a peripheral component interconnect standard PCI bus, or an extended industry standard architecture EISA bus, among others. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in FIG. 8, but not only one bus or type of bus.
And the memory is used for storing programs. In particular, the program may include program code including computer-operating instructions. The memory may include memory and non-volatile storage and provide instructions and data to the processor. The processor reads the corresponding computer program from the nonvolatile memory to the memory and then runs the computer program to form the variable sampling rate audio data acquisition device based on the aerospace telemetry which is configured in a centralized way on a logic level. The processor executes the program stored in the memory and is specifically used for executing the variable sampling rate audio data acquisition method of aerospace telemetry.
The variable sampling rate audio data acquisition method for aerospace telemetry can be applied to a processor or realized by the processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The processor may be a general-purpose processor, including a central processing unit (CentralProcessing Unit, CPU), a network processor (Network Processor, NP), etc.; but also digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific IntegratedCircuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.
Of course, other implementations, such as a logic device or a combination of hardware and software, are not excluded from the electronic device of the present invention, that is, the execution subject of the following processing flows is not limited to each logic unit, but may be hardware or a logic device. The system, apparatus, module or unit set forth in the above embodiments may be implemented in particular by a computer chip or entity, or by a product having a certain function. One typical implementation is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a car-mounted human-computer interaction device, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
Although the invention provides method operational steps as described in the examples or flowcharts, more or fewer operational steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one way of performing the order of steps and does not represent a unique order of execution. When implemented in an actual device or end product, the instructions may be executed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment, or even in a distributed data processing environment) as illustrated by the embodiments or by the figures.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus, and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for apparatus, electronic devices, and readable storage medium embodiments, since they are substantially similar to method embodiments, the description is relatively simple, and references to parts of the description of method embodiments are only required.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (15)
1. The utility model provides a variable sampling rate audio data acquisition method of space flight telemetry, which is characterized in that is applied to audio acquisition terminal equipment, and the acquisition method includes:
collecting an audio pulse modulation signal in real time at a first sampling rate to obtain an original audio pulse modulation signal;
caching the original audio pulse modulation signals acquired in a period of time;
acquiring specific peripheral signals on a rocket body in real time, and controlling buffered original audio pulse modulation signals to be output in a first sampling rate or a second sampling rate according to whether the specific peripheral signals are acquired or not to obtain audio pulse modulation signals; wherein the second sampling rate is less than the first sampling rate;
And encoding the audio pulse modulation signal to obtain encoded data, and transmitting the encoded data to audio receiving terminal equipment.
2. The method according to claim 1, wherein the real-time acquisition of the specific peripheral signal on the rocket body controls the buffered original audio pulse modulation signal to be output in the form of a first sampling rate or a second sampling rate according to whether the specific peripheral signal is acquired, specifically comprising:
when the specific peripheral signal is not acquired, resampling the buffered original audio pulse modulation signal in a form of a second sampling rate to obtain an audio pulse modulation signal of the second sampling rate and outputting the audio pulse modulation signal;
and when the specific peripheral signal is acquired, maintaining the form of the first sampling rate to output the cached original audio pulse modulation signal.
3. The utility model provides a variable sampling rate audio data acquisition method of space flight telemetry, which is characterized in that the method is applied to audio receiving terminal equipment, and comprises the following steps:
receiving encoded data, and decoding the encoded data to obtain an audio pulse modulation signal;
judging whether the audio pulse modulation signal is an audio pulse modulation signal with a first sampling rate or an audio pulse modulation signal with a second sampling rate;
When the audio pulse modulation signal is determined to be the audio pulse modulation signal with the second sampling rate, interpolation processing is carried out on the audio pulse modulation signal with the second sampling rate, and a continuous audio pulse modulation signal is obtained;
and storing and playing the continuous audio pulse modulation signal.
4. A method of acquisition according to claim 3, characterized in that the acquisition method further comprises:
when the audio pulse modulation signal is determined to be the audio pulse modulation signal with the first sampling rate, the audio pulse modulation signal with the first sampling rate is directly stored and played.
5. The method of claim 4, wherein the determining whether the audio pulse modulated signal is an audio pulse modulated signal at a first sampling rate or an audio pulse modulated signal at a second sampling rate comprises:
acquiring a play time stamp of the audio pulse modulation signal, and calculating the sampling rate of the original audio pulse modulation signal according to the time stamp;
comparing the sampling rate of the decoded audio pulse modulation signal with the sampling rate of the original audio pulse modulation signal;
when the sampling rate of the decoded audio pulse modulation signal is lower than that of the original audio pulse modulation signal, determining that the decoded audio pulse modulation signal is an audio pulse modulation signal with a second sampling rate; when the sampling rate of the decoded audio pulse modulation signal is equal to the sampling rate of the original audio pulse modulation signal, determining that the decoded audio pulse modulation signal is an audio pulse modulation signal with a first sampling rate.
6. The method of claim 5, wherein when the audio pulse modulated signal is determined to be an audio pulse modulated signal with a second sampling rate, performing interpolation processing on the audio pulse modulated signal with the second sampling rate to obtain a continuous audio pulse modulated signal, and specifically comprising:
and restoring the audio pulse modulation signal with the second sampling rate to the same sampling rate as the original audio pulse modulation signal by adopting a linear interpolation mode to obtain a continuous audio pulse modulation signal.
7. An audio data acquisition device of variable sampling rate of space flight telemetry, characterized in that is applied to audio acquisition terminal equipment, the acquisition device includes:
the acquisition unit is used for acquiring the audio pulse modulation signal in real time at a first sampling rate to obtain an original audio pulse modulation signal;
the audio buffer is used for buffering the original audio pulse modulation signals acquired in a period of time;
the peripheral signal processing unit is used for acquiring specific peripheral signals on the rocket body in real time, and controlling the buffered original audio pulse modulation signals to be output in a first sampling rate or a second sampling rate according to whether the specific peripheral signals are acquired or not so as to obtain audio pulse modulation signals;
And the coding and transmitting unit is used for coding the audio pulse modulation signal to obtain coded data and transmitting the coded data to audio receiving end equipment.
8. The acquisition device of claim 7, wherein the peripheral signal processing unit is specifically configured to:
when the specific peripheral signal is not acquired, resampling the buffered original audio pulse modulation signal in a form of a second sampling rate to obtain an audio pulse modulation signal of the second sampling rate and outputting the audio pulse modulation signal;
and when the specific peripheral signal is acquired, maintaining the form of the first sampling rate to output the cached original audio pulse modulation signal.
9. An audio data acquisition device with variable sampling rate for space telemetry, which is applied to audio receiving terminal equipment, the acquisition device comprising:
the receiving and decoding unit is used for receiving the coded data, and decoding the coded data to obtain an audio pulse modulation signal;
a judging unit, configured to judge whether the audio pulse modulated signal is an audio pulse modulated signal with a first sampling rate or an audio pulse modulated signal with a second sampling rate;
the difference processing unit is used for carrying out interpolation processing on the audio pulse modulation signal with the second sampling rate to obtain a continuous audio pulse modulation signal when the audio pulse modulation signal is judged to be the audio pulse modulation signal with the second sampling rate;
And the storage and playing unit is used for storing and playing the continuous audio pulse modulation signals.
10. The acquisition device of claim 9, wherein the storage and playback unit is further configured to:
when the audio pulse modulation signal is judged to be the audio pulse modulation signal with the first sampling rate, the audio pulse modulation signal with the first sampling rate is directly stored and played.
11. The acquisition device of claim 9, wherein the determination unit comprises:
the acquisition and calculation subunit is used for acquiring the playing time stamp of the audio pulse modulation signal and calculating the sampling rate of the original audio pulse modulation signal according to the time stamp;
a comparing subunit, configured to compare a sampling rate of the decoded audio pulse modulated signal with a sampling rate of the original audio pulse modulated signal;
a determining subunit, configured to determine that the decoded audio pulse modulated signal is an audio pulse modulated signal with a second sampling rate when the sampling rate of the decoded audio pulse modulated signal is lower than the sampling rate of the original audio pulse modulated signal; when the sampling rate of the decoded audio pulse modulation signal is equal to the sampling rate of the original audio pulse modulation signal, determining that the decoded audio pulse modulation signal is an audio pulse modulation signal with a first sampling rate.
12. The acquisition device according to claim 11, wherein the difference processing unit is specifically configured to:
and restoring the audio pulse modulation signal with the second sampling rate to the same sampling rate as the original audio pulse modulation signal by adopting a linear interpolation mode to obtain a continuous audio pulse modulation signal.
13. A variable sampling rate audio data acquisition system for aerospace telemetry comprises an audio acquisition end device and an audio receiving end device, and is characterized in that,
the audio acquisition end device is used for acquiring the audio pulse modulation signal in real time at a first sampling rate to obtain an original audio pulse modulation signal; caching the original audio pulse modulation signals acquired in a period of time; acquiring specific peripheral signals on a rocket body in real time, and controlling buffered original audio pulse modulation signals to be output in a first sampling rate or a second sampling rate according to whether the specific peripheral signals are acquired or not to obtain audio pulse modulation signals; encoding the audio pulse modulation signal to obtain encoded data, and transmitting the encoded data to audio receiving terminal equipment;
the audio receiving end device is used for receiving the coded data, decoding the coded data and obtaining an audio pulse modulation signal; judging whether the audio pulse modulation signal is an audio pulse modulation signal with a first sampling rate or an audio pulse modulation signal with a second sampling rate; when the audio pulse modulation signal is judged to be the audio pulse modulation signal with the second sampling rate, interpolation processing is carried out on the audio pulse modulation signal with the second sampling rate, and a continuous audio pulse modulation signal is obtained; and storing and playing the continuous audio pulse modulation signal.
14. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements a variable sample rate audio data acquisition method of space telemetry according to any one of claims 1-2 or claims 3-6.
15. An electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement a variable sample rate audio data acquisition method of space telemetry according to any one of claims 1-2 or claims 3-6.
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