CN106603855B - Method and system for realizing FM (frequency modulation) music transmission of mobile terminal - Google Patents
Method and system for realizing FM (frequency modulation) music transmission of mobile terminal Download PDFInfo
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- CN106603855B CN106603855B CN201611207557.8A CN201611207557A CN106603855B CN 106603855 B CN106603855 B CN 106603855B CN 201611207557 A CN201611207557 A CN 201611207557A CN 106603855 B CN106603855 B CN 106603855B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 57
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- 238000001914 filtration Methods 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72442—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality for playing music files
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
- G10L19/26—Pre-filtering or post-filtering
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/003—Changing voice quality, e.g. pitch or formants
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Abstract
The invention discloses a method and a system for realizing FM music transmission of a mobile terminal, wherein the method comprises the steps of receiving a music signal played by FM of transmitting equipment; performing analog-to-digital conversion and filtering processing on the music signal played by the FM; carrying out analog reduction analysis on the processed digital signal, and judging whether the digital signal is consistent with an FM (frequency modulation) played music signal transmitted by transmitting equipment or not after analog reduction; and when the digital signal is consistent with the FM-played music signal transmitted by the transmitting equipment after analog reduction, the digital signal is transmitted to other equipment. The invention further ensures that the original music signal can still keep the tone quality on the original equipment after transmission by filtering the music signal and verifying whether the filtered signal is consistent with the original music signal after analog reduction, and can not generate interference of noise and the like, thereby ensuring that a user can listen to music with high tone quality.
Description
Technical Field
The invention relates to the field of FM transmission of a mobile terminal, in particular to a method and a system for realizing FM music transmission of the mobile terminal.
Background
With the development of mobile communication and the continuous improvement of living standard of people, the use of mobile phones is more and more popular, and the mobile phones become indispensable communication tools in the life of people. For example, many users like to play music played by FM on a mobile phone by using a vehicle-mounted music player when driving, but the FM music transmission function of the mobile phone in the prior art is poor in transmitted music tone quality and serious in noise, and sometimes even has a completely different music effect from that played by the original device, so that the users cannot enjoy high tone quality when listening to music transmitted by FM of other devices.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
In view of the foregoing disadvantages of the prior art, an object of the present invention is to provide a method and a system for implementing FM music transmission of a mobile terminal, which can transmit the music played by FM to other devices with substantially no difference in sound quality.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for realizing FM music transmission of a mobile terminal comprises the following steps:
A. receiving a music signal played by FM of transmitting equipment;
B. performing analog-to-digital conversion and filtering processing on the music signal played by the FM;
C. carrying out analog reduction analysis on the processed digital signal, and judging whether the digital signal is consistent with an FM (frequency modulation) played music signal transmitted by transmitting equipment or not after analog reduction;
D. and when the digital signal is consistent with the FM-played music signal transmitted by the transmitting equipment after analog reduction, the digital signal is transmitted to other equipment.
Further, between step a and step B, further comprising:
a01, sending an interrupt signal to a central processing unit to request for processing the music signal played by the FM player;
and A02, calling a control command to process the music signal played by FM.
Specifically, the step B includes:
b1, performing analog-to-digital conversion on the received FM played music signal;
and B2, filtering the signals after the analog-digital conversion.
Specifically, the step C includes:
c1, collecting the digital signals after filtering;
and C2, carrying out analog reduction on the acquired digital signals, and judging whether the signals subjected to analog reduction are consistent with the music signals played by the FM.
Further, the step D further includes:
and when the digital signal is inconsistent with the music signal played by the FM after the analog reduction, repeating the step C1 until the acquired digital signal is consistent with the music signal played by the FM after the analog reduction, and sending the acquired digital signal to other equipment.
An FM music transmission system of a mobile terminal, comprising:
the signal receiving module is used for receiving the music signal of FM playing transmitted by the transmitting equipment;
the signal processing module is used for carrying out analog-to-digital conversion and filtering processing on the music signal played by the FM;
the signal analysis module is used for carrying out analog reduction analysis on the processed digital signal and judging whether the digital signal is consistent with the FM-played music signal transmitted by the transmitting equipment after analog reduction;
and the signal transmitting module is used for transmitting the digital signal to other equipment when the digital signal is consistent with the FM-played music signal transmitted by the transmitting equipment after analog reduction.
Further, the system further comprises:
the signal processing request module is used for sending an interrupt signal to the central processing unit and requesting to process the music signal played by the FM;
and the processor module is used for calling the control instruction to process the music signal played by the FM.
Specifically, the signal processing module includes:
the analog-to-digital conversion unit is used for performing analog-to-digital conversion on the received FM played music signal;
and the filtering unit is used for carrying out filtering processing on the signals after the analog-digital conversion.
Specifically, the signal analysis module includes:
the acquisition unit is used for acquiring the digital signals after filtering processing;
and the analog reduction analysis unit is used for performing analog reduction on the acquired digital signals and judging whether the signals subjected to analog reduction are consistent with the music signals played by the FM player or not.
Further, the signal transmitting module is further configured to repeatedly acquire the digital signal after filtering when the digital signal is inconsistent with the music signal played by the FM after analog reduction, and send the acquired digital signal to other devices when the acquired digital signal is consistent with the music signal played by the FM after analog reduction.
Compared with the prior art, the method and the system for realizing FM music transmission of the mobile terminal provided by the invention comprise the steps of receiving the music signal played by the FM of the transmitting equipment; performing analog-to-digital conversion and filtering processing on the music signal played by the FM; carrying out analog reduction analysis on the processed digital signal, and judging whether the digital signal is consistent with an FM (frequency modulation) played music signal transmitted by transmitting equipment or not after analog reduction; and when the digital signal is consistent with the FM-played music signal transmitted by the transmitting equipment after analog reduction, the digital signal is transmitted to other equipment. The invention further ensures that the original music signal can still keep the tone quality on the original equipment after transmission by filtering the music signal and verifying whether the filtered signal is consistent with the original music signal after analog reduction, and can not generate interference of noise and the like, thereby ensuring that a user can listen to music with high tone quality.
Drawings
Fig. 1 is a flowchart of an implementation method of FM music transmission of a mobile terminal according to the present invention.
Fig. 2 is a specific flowchart of the step S3 in the method for implementing FM music transmission of a mobile terminal according to the present invention.
Fig. 3 is a specific flowchart of the step S4 in the method for implementing FM music transmission of a mobile terminal according to the present invention.
Fig. 4 is a block diagram of an FM music transmission system of a mobile terminal according to the present invention.
Detailed Description
The invention provides a method and a system for realizing FM music transmission of a mobile terminal, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail by referring to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the method for implementing FM music transmission of a mobile terminal according to the present invention includes:
s1, receiving music signals played by FM of the transmitting equipment;
s2, performing analog-to-digital conversion and filtering processing on the music signal played by the FM;
s3, carrying out analog reduction analysis on the processed digital signal, and judging whether the digital signal is consistent with the FM-played music signal transmitted by the transmitting equipment after analog reduction;
and S4, when the digital signal is consistent with the FM-played music signal transmitted by the transmitting equipment after analog reduction, the digital signal is transmitted to other equipment.
Specifically, the transmitting device is an intelligent mobile terminal or a tablet, FM music playing software is installed in the transmitting device, and before step S1, the FM signal transmitting module of the intelligent mobile terminal or the tablet transmits the music signal currently played by FM.
The steps between S1 and S2 further include:
s01, sending an interrupt signal to the central processing unit to request for processing the music signal played by the FM player;
and S02, calling a control command to process the music signal played by the FM.
In step S01, the interrupt signal is a request signal, and the central processing unit controls the signal processing module to perform signal processing after receiving the interrupt signal.
In step S02, the control instruction is used to control the signal processing module to work, and after the central processing unit calls the control instruction, the signal processing module is controlled to perform signal processing.
Referring to fig. 2, the step S2 specifically includes:
s21, performing analog-to-digital conversion on the received FM played music signal;
and S22, filtering the signals after the analog-digital conversion.
In step S21, after receiving the music signal played by FM, the music signal is converted into a digital signal, so that other devices can perform algorithm processing on the signal after receiving the signal.
In step S22, when the FM-played music signal is sent, an interfering signal is inevitably generated, which may affect characteristics such as the sound effect of the music, and may seriously affect the sound quality.
Referring to fig. 3, the step S3 includes:
s31, collecting the digital signals after filtering;
and S32, carrying out analog reduction on the acquired digital signals, and judging whether the reduced signals are consistent with the music signals played by the FM.
Specifically, after digital-to-analog conversion and filtering are carried out on the music signal, the processed digital signal is collected and subjected to analog reduction analysis, whether the signal subjected to analog reduction is consistent with the music signal played by the FM is judged, the result that the music signal is seriously distorted during transmission is avoided, even the processed signal is not the original music signal, and the user can be ensured to hear the music played by the FM of the original equipment.
In specific implementation, when the analog restored signal is consistent with the music signal played by the FM, the digital signal after filtering processing may be sent, that is, when the analog restored signal is consistent with the music signal transmitted by the FM, the digital signal waits to be output to other devices.
Further, the step S4 further includes:
and when the digital signal is inconsistent with the music signal played by the FM after the analog reduction, repeating the step S31 until the acquired digital signal is consistent with the music signal played by the FM after the analog reduction, and sending the acquired digital signal to other equipment.
Specifically, when the acquired and transmitted digital signal is not consistent with the analog signal transmitted by the FM after analog reduction, step S31 is repeated to acquire the output digital signal and perform analog reduction analysis again. And stopping collecting the digital signals until the collected and transmitted digital signals are consistent with the analog signals transmitted by the FM after analog reduction. Then, the digital signal waits for output to other devices.
The other equipment can be one or a plurality of equipment, the transmitting equipment can simultaneously transmit the music signals played by FM to a plurality of equipment, the other equipment can also be an intelligent mobile terminal or a tablet, and the intelligent equipment can also be intelligent equipment such as a vehicle-mounted music player.
Further, the step S4 is followed by:
s5, the other equipment receives the digital signal and decodes the digital signal;
s6, carrying out algorithm processing on the decoded signal and converting the signal into a voice analog signal;
and S7, outputting the voice analog signal through the player.
Specifically, when the digital signal is transmitted to a signal receiving unit of another device, the signal receiving unit receives the digital signal and outputs the digital signal to the signal encoding/decoding module. The signal coding/decoding module sends a decoding request signal and outputs a decoding enabling signal to the signal coding/decoding module according to the decoding request signal, and the signal coding/decoding module decodes and processes the digital signal output by the signal receiving unit of the equipment.
The digital signal decoded and output by the signal coding/decoding module is processed by an audio processing module, the audio processing module carries out algorithm processing on the digital signal, outputs the digital signal to the inside of the audio processing module for digital-to-analog conversion, and outputs the output voice analog signal through a player of the equipment.
Based on the method, the invention also correspondingly provides an FM music transmission system of the mobile terminal, which comprises the following steps:
the signal receiving module 10 is configured to receive a music signal of FM broadcast transmitted by the transmitting device;
the signal processing module 20 is configured to perform analog-to-digital conversion and filtering processing on the music signal played by the FM player;
the signal analysis module 30 is configured to perform analog restoration analysis on the processed digital signal, and determine whether the digital signal after analog restoration is consistent with a music signal played by an FM transmitted by the transmitting device;
and the signal transmitting module 40 is configured to send the digital signal to other devices when the analog restored digital signal is consistent with the FM-played music signal transmitted by the transmitting device.
Further, the system further comprises:
the signal processing request module is used for sending an interrupt signal to the central processing unit and requesting to process the music signal played by the FM;
and the processor module is used for calling the control instruction to process the music signal played by the FM.
Specifically, the signal processing module includes:
the analog-to-digital conversion unit is used for performing analog-to-digital conversion on the received FM played music signal;
and the filtering unit is used for carrying out filtering processing on the signals after the analog-digital conversion.
Specifically, the signal analysis module includes:
the acquisition unit is used for acquiring the digital signals after filtering processing;
and the analog reduction analysis unit is used for performing analog reduction on the acquired digital signals and judging whether the signals subjected to analog reduction are consistent with the music signals played by the FM player or not.
Further, the signal transmitting module 40 is further configured to, when the digital signal after analog reduction is inconsistent with the music signal played by the FM, repeatedly acquire the digital signal after filtering processing, and when the acquired digital signal after analog reduction is consistent with the music signal played by the FM, send the acquired digital signal to other devices.
Since the above detailed description has been made on the implementation method of FM music transmission of the mobile terminal, no further description is given here.
In summary, the invention performs filtering processing on the music signal, and verifies whether the filtered signal after analog restoration is consistent with the original music signal, thereby further ensuring that the original music signal can still maintain the tone quality on the original equipment after transmission, and no interference such as noise is generated, and ensuring that the user can listen to music with high tone quality.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (2)
1. A method for realizing FM music transmission of a mobile terminal is characterized by comprising the following steps:
A. receiving a music signal played by FM of transmitting equipment; the transmitting equipment is a mobile terminal;
B. performing analog-to-digital conversion and filtering processing on the music signal played by the FM;
the filtering processing also comprises filtering noise in the music;
C. carrying out analog reduction analysis on the processed digital signal, and judging whether the digital signal is consistent with an FM (frequency modulation) played music signal transmitted by transmitting equipment or not after analog reduction;
the step C comprises the following steps:
c1, collecting the digital signals after filtering;
c2, carrying out analog reduction on the acquired digital signals, and judging whether the signals subjected to analog reduction are consistent with the music signals played by FM;
D. when the digital signal is consistent with the FM-played music signal transmitted by the transmitting equipment after analog reduction, the digital signal is transmitted to other equipment;
the step D also comprises the following steps:
when the digital signal is not consistent with the music signal played by the FM after analog reduction, the step C1 is repeated until the acquired digital signal is consistent with the music signal played by the FM after analog reduction, and the acquired digital signal is sent to other equipment;
the method also comprises the following steps between the step A and the step B:
a01, sending an interrupt signal to a central processing unit to request for processing the music signal played by the FM player;
a02, calling a control instruction to process the music signal played by FM; the control instruction is used for controlling the signal processing module to work, and the signal processing module is controlled to process signals after the central processing unit calls the control instruction;
the step B comprises the following steps:
b1, performing analog-to-digital conversion on the received FM played music signal;
and B2, filtering the signals after the analog-digital conversion.
2. An FM music transmission system of a mobile terminal, comprising:
the signal receiving module is used for receiving the music signal of FM playing transmitted by the transmitting equipment; the transmitting equipment is a mobile terminal;
the signal processing module is used for carrying out analog-to-digital conversion and filtering processing on the music signal played by the FM;
the filtering processing also comprises filtering noise in the music;
the signal analysis module is used for carrying out analog reduction analysis on the processed digital signal and judging whether the digital signal is consistent with the FM-played music signal transmitted by the transmitting equipment after analog reduction;
the signal analysis module includes:
the acquisition unit is used for acquiring the digital signals after filtering processing;
the analog reduction analysis unit is used for performing analog reduction on the acquired digital signals and judging whether the signals subjected to analog reduction are consistent with the music signals played by the FM;
the signal transmitting module is used for transmitting the digital signal to other equipment when the digital signal is consistent with the FM-played music signal transmitted by the transmitting equipment after analog reduction;
the signal transmitting module is also used for repeatedly acquiring the digital signal after filtering processing when the digital signal is inconsistent with the music signal played by the FM after analog reduction, and transmitting the acquired digital signal to other equipment when the acquired digital signal is consistent with the music signal played by the FM after analog reduction;
the signal processing request module is used for sending an interrupt signal to the central processing unit and requesting to process the music signal played by the FM;
the processor module is used for calling the control instruction to process the music signal played by the FM; the control instruction is used for controlling the signal processing module to work, and the signal processing module is controlled to process signals after the central processing unit calls the control instruction;
the signal processing module includes:
the analog-to-digital conversion unit is used for performing analog-to-digital conversion on the received FM played music signal;
and the filtering unit is used for carrying out filtering processing on the signals after the analog-digital conversion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611207557.8A CN106603855B (en) | 2016-12-23 | 2016-12-23 | Method and system for realizing FM (frequency modulation) music transmission of mobile terminal |
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| CN201611207557.8A CN106603855B (en) | 2016-12-23 | 2016-12-23 | Method and system for realizing FM (frequency modulation) music transmission of mobile terminal |
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| CN106603855B true CN106603855B (en) | 2021-02-19 |
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| CN110472094B (en) * | 2019-08-06 | 2023-03-31 | 沈阳大学 | Traditional music recording method |
| CN115835111A (en) * | 2022-10-20 | 2023-03-21 | 武汉海微科技有限公司 | Signal detection circuit, method and device |
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| CN102694584A (en) * | 2011-03-21 | 2012-09-26 | 冯汉英 | System for audio transmission via wireless network |
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| CN1434571A (en) * | 2002-01-23 | 2003-08-06 | 杨曙辉 | Vehicle carried wireless MP3 receiving player |
| CN1979440A (en) * | 2005-12-02 | 2007-06-13 | 鸿富锦精密工业（深圳）有限公司 | Plate-carried audio-frequency module testing system and method |
| CN101911661A (en) * | 2008-01-02 | 2010-12-08 | 索尼爱立信移动通讯有限公司 | Wireless headset having fm transmitter |
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