CN111128207A - Self-listening and self-loop calling box and calling method thereof - Google Patents
Self-listening and self-loop calling box and calling method thereof Download PDFInfo
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- CN111128207A CN111128207A CN201911414783.7A CN201911414783A CN111128207A CN 111128207 A CN111128207 A CN 111128207A CN 201911414783 A CN201911414783 A CN 201911414783A CN 111128207 A CN111128207 A CN 111128207A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/48—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use
- G10L25/51—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use for comparison or discrimination
- G10L25/60—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use for comparison or discrimination for measuring the quality of voice signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2236—Quality of speech transmission monitoring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
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- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computational Linguistics (AREA)
- Human Computer Interaction (AREA)
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- Quality & Reliability (AREA)
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Abstract
The invention provides a self-listening and self-loop communication box which comprises an ARM processor, a first audio coder-decoder and a second audio coder-decoder which are respectively connected with the ARM processor, and an audio power amplifier, wherein the ARM processor is used for loading a control program and enabling clocks of the first audio coder-decoder and the second audio coder-decoder to be the same when the first audio coder-decoder and the second audio coder-decoder are powered on; the ARM processor controls the first audio codec, the second audio codec and the audio power amplifier to respectively form a digital signal sending channel, an analog signal sending channel, a digital signal receiving channel and an analog signal receiving channel. The invention also provides a call method of the self-listening and self-loop call box. Compared with the prior art, the self-listening and self-loop call box and the call method thereof can edit call control requirements without replacing hardware, have good call effect and have two call modes of digital and analog.
Description
Technical Field
The invention relates to the technical field of short wave communication, in particular to a self-listening and self-loop communication box and a communication method thereof.
Background
With the increase of various information quantities in the modern society and the high quality requirements of people on image and sound, the traditional communication based on the analog technology can not meet the modernization requirements, the volume of analog audio is uncontrollable, the crosstalk between frequency spectrums is large, out-of-band noise can not be effectively filtered, and more digital processing technologies are integrated into short-wave communication; at present, audio is integrated in a processor of a civil mobile phone, a voice enhancement chip is adopted to enhance the conversation quality, algorithms such as noise reduction, audio coding and decoding processing and the like are also adopted in the chip, and an equalizer is also added in a similar audio player to improve the audio effect. The audio coding compresses the digital audio information according to the self correlation of the audio information and the hearing redundancy of human ears to the audio information, and realizes the performances of high compression ratio, good confidentiality, strong anti-interference performance, effective noise elimination and the like, so that the adoption of the audio coding and decoding technology is necessary.
At present, a traditional call box consisting of audio amplification and voice compression is used in a short-wave communication radio station, the call box in a call can only be measured by indexes such as frequency response, sensitivity and the like, and the two indexes of the frequency response and the sensitivity are restricted with each other and cannot meet the requirements of the frequency response and the sensitivity at the same time; the voice compression can not meet the condition that the voice frequency components are completely the same, the problems of the voice box and the whole radio station can not be distinguished by the current voice box to work in an analog mode, and a corresponding audio processing mode needs to be added at the rear end to meet the index requirement of the whole radio station.
Disclosure of Invention
The invention aims to provide a self-listening and self-loop call box which can be edited, has good call effect and has two call modes of digital and analog, and a call method thereof.
In order to solve the technical problem, the invention provides a self-listening and self-loop calling box, which comprises an ARM processor, a first audio codec and a second audio codec which are respectively connected with the ARM processor, and an audio power amplifier, wherein the ARM processor is used for loading a control program when the first audio codec and the second audio codec are powered on and enabling the clocks of the first audio codec and the second audio codec to be the same; the ARM processor controls the first audio codec to receive differential analog signals collected by the microphone, processes audio signals of the differential analog signals, and converts the audio signals into digital signals to be output so as to form a digital signal sending channel; the ARM processor controls the first audio codec to receive differential analog signals collected by the microphone, converts the differential analog signals into digital signals after audio signal processing, and outputs the digital signals as differential analog signals after digital-to-analog conversion through the second audio codec so as to form an analog signal sending channel; the ARM processor controls the first audio codec to receive the digital signals output by the digital signal sending channel, processes the audio signals and then converts the signals into differential analog signals to output, and the audio power amplifier receives the differential analog signals and then performs power amplification processing on the signals for an earphone to receive so as to form a digital signal receiving channel; the ARM processor controls the second audio codec to receive the differential analog signal output by the analog signal sending channel, converts the differential analog signal into a digital signal to output after carrying out analog-to-digital conversion processing on the differential analog signal, outputs the digital signal as the differential analog signal after carrying out audio signal processing on the digital signal through the first audio codec, and carries out power amplification processing on the digital signal after receiving the differential analog signal by the audio power amplifier for receiving by an earphone so as to form an analog signal receiving channel.
Preferably, the first audio codec and the second audio codec are respectively connected to two pairs of I2C pins of the ARM processor, and the two pairs of I2C pins operate independently.
Preferably, the first audio codec comprises a first volume control module, an ALC control module, a left and right channel compensation module, a filtering module, a sound equalizer module, a noise reduction module and a first ADC module, which are connected in series in sequence; the working clock of the first audio codec is 12.288MHz, and the sampling rate is 48 k.
Preferably, the second audio codec comprises a second ADC module and a second volume control module connected in series in sequence; the working clock of the second audio codec is 12.288MHz, and the sampling rate is 48 k.
Preferably, the audio power amplifier is provided with a 16/32 ohm household earphone jack.
Compared with the prior art, in the self-hearing self-loop phone box and the call method thereof, the ARM processor, the first audio codec and the second audio codec which are respectively connected with the ARM processor, and the audio power amplifier form a digital signal sending channel, an analog signal sending channel, a digital signal receiving channel and an analog signal receiving channel, and analog and digital mode output can be switched according to the requirements of a radio station; and according to the specific call quality, the ARM processor can be used for carrying out program editing to improve the voice quality without changing hardware. Meanwhile, the self-hearing self-loop call box can carry out self-loop to check the voice quality of the self-hearing self-loop call box, so that the problems of the whole machine and the self-hearing self-loop call box are effectively solved, and the self-hearing self-loop call box is high in transportability, multiple in function and easy to realize.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is a block diagram of an outgoing port structure of a self-listening and self-loop phone box according to the present invention;
fig. 2 is a schematic view of the receiving end structure of the self-listening and self-loop phone box according to the present invention;
FIG. 3 is a schematic block diagram of a first audio encoder in the self-hearing self-loop phone box according to the present invention;
FIG. 4 is a schematic block diagram of a second audio encoder in the self-hearing self-loop phone box according to the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a self-listening and self-looping phone box, which includes an ARM processor 1, a first audio codec 2 and a second audio codec 3 respectively connected to the ARM processor 1, and an audio power amplifier 4.
The ARM processor 1 is used for loading a control program when the first audio codec 2 and the second audio codec 3 are powered on and enabling the clocks of the two to be the same. The improved voice quality can be achieved by the ARM processor 1 programming the first audio codec 2 and the second audio codec 3 without changing hardware. The first audio codec 2 and the second audio codec 3 need to have the same clock, otherwise the digital signal sent by one to the other cannot be identified, and a scrambling code is generated.
In this embodiment, the first audio codec 2 and the second audio codec 3 are respectively connected to two pairs of I2C pins of the ARM processor 1, and the two pairs of I2C pins operate independently.
Specifically, the first audio codec 2 includes a first volume control module 21, an ALC control module 22, a left and right channel compensation module 23, a filtering module 24, an audio equalizer module 25, a noise reduction module 26, and a first ADC module 27, which are sequentially connected in series. In this embodiment, the operating clock of the first audio codec 2 is 12.288MHz, and the sampling rate is 48 k.
The second audio codec 3 includes a second ADC module 31 and a second volume control module 32 connected in series in this order. In this embodiment, the operating clock of the second audio codec 32 is 12.288MHz, and the sampling rate is 48 k.
At present, military earphones are poor in tone quality and are more suitable for civilian use, signals with the same amplitude are broken in the military earphones, and the signals of the civil earphones are not broken in the voice. Therefore, in this embodiment, the audio power amplifier is provided with a 16/32 ohm household earphone jack.
Specifically, the ARM processor 1 controls the first audio codec 2 to receive the differential analog signal collected by the microphone, and converts the differential analog signal into a digital signal after performing audio signal processing on the differential analog signal, so as to form a digital signal transmission channel 10.
The ARM processor 1 controls the first audio codec 2 to receive the differential analog signals collected by the microphone, processes the audio signals, converts the audio signals into digital signals and outputs the digital signals, and outputs the digital signals as differential analog signals after digital-to-analog conversion through the second audio codec 3 to form an analog signal sending channel 20.
The ARM processor 1 controls the first audio codec 2 to receive the digital signals output by the digital signal sending channel 10, converts the digital signals into differential analog signals after audio signal processing, and outputs the differential analog signals, and the audio power amplifier 4 receives the differential analog signals and then performs power amplifier processing on the differential analog signals for receiving by an earphone so as to form a digital signal receiving channel 30.
The ARM processor 1 controls the second audio codec 3 to receive the differential analog signal output by the analog signal sending channel, converts the differential analog signal into a digital signal after performing analog-to-digital conversion processing on the differential analog signal and outputs the digital signal as the differential analog signal after performing audio signal processing on the digital signal through the first audio codec 2, and the audio power amplifier 4 receives the differential analog signal and performs power amplification processing on the differential analog signal for receiving by an earphone to form an analog signal receiving channel 40.
That is, the self-hearing self-loop box is connected to a transmit path and a receive path.
Wherein, send the passageway: the voice signal sent by the microphone (microphone) is sent to the first audio codec 2, and if the back end needs a digital signal, the digital signal is sent out by adopting a digital signal sending channel 10; if the back end needs an analog signal, the converted digital signal is sent to the port of the second DAC module 31 of the second audio codec 3, the inside of the second audio codec 3 is mainly used for volume amplification, and the amplified signal is sent to the back end through the analog signal sending channel 20.
A channel collecting step: if the digital signal is sent from the whole machine, the digital signal is sent to the audio power amplifier 4 by the digital signal receiving channel 30 to be transmitted to the earphone. If the signal sent by the whole machine is an analog signal, the analog signal receiving channel 40 is adopted, the digital signal converted by the second audio codec 3 is sent to the port of the first DAC module 27 of the first audio codec 2, the first audio codec 2 converts the digital signal into an analog signal and sends the analog signal to the audio power amplifier 4, and finally the earphone is connected to output voice.
The first audio codec 2 is a main device of the transmission channel, and the signal is mainly processed in the transmission channel, so that the transmitted signal is ideal. The second audio codec 3 is a main component of the receiving channel, and the received signal is not processed as much as possible, and is filtered and volume-amplified at most to avoid adding excessive other interference.
Before use, a program is written in the ARM processor 1 according to specific use conditions, the program is loaded into the first audio codec 2 and the second audio codec 3 through the ARM processor 1, and meanwhile, the internal settings of a chip can be adjusted in real time by a computer to achieve the best transceiving effect. When in use, only the output signal is connected with the rear end, and the power is supplied to the internal part of the device.
Through practical tests, the self-listening and self-loop telephone box can be edited, when the sound is below the noise threshold, the voice is automatically turned off, the tone quality is smooth and mellow after self-loop, the noise can be effectively suppressed, the played music is pleasant, the played continuous voice has no falling words and is clear and understandable, and the measured frequency response is within the range of 3dB in the range of 80 Hz-3.3 KHz.
The invention also provides a communication method of the self-hearing self-loop communication box, and the method comprises the following steps:
the ARM processor 1 controls the differential analog signal collected by the self-hearing self-loop phone box 100 as required, so that the differential analog signal is sent out after being processed by the digital signal sending channel 10 or the analog signal sending channel 20.
The ARM processor 2 controls the digital signal or the differential analog signal outputted from the self-hearing loop phone box 100 to be received through the digital signal receiving channel 30 or the differential analog signal to be received through the differential analog signal receiving channel 40 according to the digital signal or the differential analog signal outputted from the self-hearing loop phone box.
Compared with the prior art, in the self-hearing self-loop phone box and the call method thereof, the ARM processor, the first audio codec and the second audio codec which are respectively connected with the ARM processor, and the audio power amplifier form a digital signal sending channel, an analog signal sending channel, a digital signal receiving channel and an analog signal receiving channel, and analog and digital mode output can be switched according to the requirements of a radio station; and according to the specific call quality, the ARM processor can be used for carrying out program editing to improve the voice quality without changing hardware. Meanwhile, the self-hearing self-loop call box can carry out self-loop to check the voice quality of the self-hearing self-loop call box, so that the problems of the whole machine and the self-hearing self-loop call box are effectively solved, and the self-hearing self-loop call box is high in transportability, multiple in function and easy to realize.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A self-listening and self-loop call box is characterized by comprising an ARM processor, a first audio coder-decoder and a second audio coder-decoder which are respectively connected with the ARM processor, and an audio power amplifier, wherein the ARM processor is used for loading a control program and enabling clocks of the first audio coder-decoder and the second audio coder-decoder to be the same when the first audio coder-decoder and the second audio coder-decoder are powered on;
the ARM processor controls the first audio codec to receive differential analog signals collected by the microphone, processes audio signals of the differential analog signals, and converts the audio signals into digital signals to be output so as to form a digital signal sending channel;
the ARM processor controls the first audio codec to receive differential analog signals collected by the microphone, converts the differential analog signals into digital signals after audio signal processing, and outputs the digital signals as differential analog signals after digital-to-analog conversion through the second audio codec so as to form an analog signal sending channel;
the ARM processor controls the first audio codec to receive the digital signals output by the digital signal sending channel, processes the audio signals and then converts the signals into differential analog signals to output, and the audio power amplifier receives the differential analog signals and then performs power amplification processing on the signals for an earphone to receive so as to form a digital signal receiving channel;
the ARM processor controls the second audio codec to receive the differential analog signal output by the analog signal sending channel, converts the differential analog signal into a digital signal to output after carrying out analog-to-digital conversion processing on the differential analog signal, outputs the digital signal as the differential analog signal after carrying out audio signal processing on the digital signal through the first audio codec, and carries out power amplification processing on the digital signal after receiving the differential analog signal by the audio power amplifier for receiving by an earphone so as to form an analog signal receiving channel.
2. The self-listening loop phone box according to claim 1, wherein the first audio codec and the second audio codec are connected to two pairs of I2C pins of the ARM processor, respectively, and two pairs of the I2C pins operate independently.
3. The self-hearing self-loop phone box according to claim 1, wherein the first audio codec comprises a first volume control module, an ALC control module, a left and right channel compensation module, a filtering module, a voice equalizer module, a noise reduction module, and a first ADC module, which are sequentially connected in series; the working clock of the first audio codec is 12.288MHz, and the sampling rate is 48 k.
4. The self-hearing self-loop phone box according to claim 1, wherein the second audio codec comprises a second ADC module and a second volume control module sequentially connected in series; the working clock of the second audio codec is 12.288MHz, and the sampling rate is 48 k.
5. The self-hearing, self-loop phone case of claim 1, wherein the audio power amplifier is provided with a 16/32 ohm civilian headphone jack.
6. A method of calling a self-hearing and self-loop box, wherein a self-hearing and self-loop box according to any one of claims 1 to 5 is provided, the method comprising the steps of:
the ARM processor controls the differential analog signals collected by the self-hearing self-loop phone box to be sent out after being processed by the digital signal sending channel or the analog signal sending channel according to needs;
and the ARM processor respectively controls the digital signal to be received through the digital signal receiving channel or the differential analog signal to be received through the differential analog signal receiving channel according to the digital signal or the differential analog signal output by the self-hearing self-loop phone box.
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