CN202218386U - Recording circuit capable of imitating recording studio functions - Google Patents

Recording circuit capable of imitating recording studio functions Download PDF

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Publication number
CN202218386U
CN202218386U CN2011203035856U CN201120303585U CN202218386U CN 202218386 U CN202218386 U CN 202218386U CN 2011203035856 U CN2011203035856 U CN 2011203035856U CN 201120303585 U CN201120303585 U CN 201120303585U CN 202218386 U CN202218386 U CN 202218386U
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CN
China
Prior art keywords
recording
circuit
mixer
processing module
acoustic processing
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011203035856U
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Chinese (zh)
Inventor
郑擎天
薛乔溦
Original Assignee
郑擎天
薛乔溦
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Publication date
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Priority to CN2011203035856U priority Critical patent/CN202218386U/en
Application granted granted Critical
Publication of CN202218386U publication Critical patent/CN202218386U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a recording circuit capable of imitating recording studio functions. The circuit can be applied to various terminals, such as an MP3, multi-media equipment, a karaoke box (KTV), cell phones and the like. The recording circuit uses a mixer to mix sound of each audio channel, can not only play music and simultaneously record sound, but also can mix played background music and live recording, eliminates disturbance of environment noises, guarantees quality of recording, is simple in circuit structure, can be transplanted to various terminal devices, and is good in practicality.

Description

The recording circuit of analog recording canopy function
Technical field
The utility model relates to a kind of audio frequency processing circuit, particularly a kind of recording circuit of analog recording canopy function.
Background technology
More existing sound pick-up outfits only can realize that all recording mode and music playing mode carry out respectively, MP3 for example, and under recording mode, it can only be recorded through the sound that pick-up is gathered external environment condition, under music playing mode, can only listen to the music.Voice for some singing fans perhaps want to record clear background music all can't be realized.Such as the patent No. be: 02112283.0 patent, its disclosed a kind of universal musical player module, this circuit module are through microphone the audio frequency of gathering directly to be handled, stored or play after through analog-to-digital conversion.This sound-recording function is that simple sound is to external world recorded, and when the user recorded, because external environment noise is big, and the mixed effect of accompaniment music and voice was poor, with having a strong impact on the quality of recording sound.And in the recording studio, the singer puts on earphone and listens music (accompaniment) singing, can also hear the voice through audio mixing at earphone simultaneously, so that the pronunciation that draws oneself up better.The present invention has realized the short-cut method of this function of analog recording canopy in portable terminal.
Summary of the invention
The purpose of the utility model provides a kind of recording circuit of analog recording canopy function, records when can not only be implemented in playing back music, and can in progress background music and live recording be mixed, and guarantees the quality of recording.
The recording circuit of the utility model comprises acoustic processing module and the microphone interface circuit with recording access, it is characterized in that: the left channel signals output of described acoustic processing module is connected with a mixer with amplitude regulating circuit through first filter, the first audio frequency amplification successively; The right-channel signals output of described acoustic processing module is connected with described mixer with amplitude regulating circuit through second filter, the second audio frequency amplification successively; Described microphone interface circuit is connected with described mixer with amplitude regulating circuit through the 3rd filter, the 3rd audio frequency amplification successively; Described mixer output is connected with the recording access of a playback interface circuit and said acoustic processing module respectively.
In the utility model one embodiment; The output of said mixer is connected with the recording access of said acoustic processing module through a selection commutation circuit, and the input of said selection commutation circuit also is connected with the output of amplitude regulating circuit with described the 3rd audio frequency amplification.
In the utility model one embodiment, described acoustic processing module module comprises the built-in sound treatment circuit that MP3 chip, digital microcontroller or DSP mix with analog circuit.
The recording circuit of the utility model can be applied to various terminals, MP3 for example, multimedia equipment and KTV and mobile phone etc.; Its utilize mixer with in the circuit separately the sound of voice-grade channel mix, have the recording mode handoff functionality, can not only realize the simple sound of recording external environment; And can also background music and live recording be mixed, guaranteeing the quality of recording, it is simple that it also has a circuit structure; Portable is to various terminal equipments, practical characteristics.
Description of drawings
Fig. 1 is the circuit structure theory diagram of the utility model embodiment.
Fig. 2 is the circuit structure theory diagram of another embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
As shown in Figure 1; Present embodiment provides a kind of recording circuit of analog recording canopy function; Comprise acoustic processing module and microphone interface circuit with recording access, it is characterized in that: the left channel signals output of described acoustic processing module is connected with a mixer with amplitude regulating circuit through first filter, the first audio frequency amplification successively; The right-channel signals output of described acoustic processing module is connected with described mixer with amplitude regulating circuit through second filter, the second audio frequency amplification successively; Described microphone interface circuit is connected with described mixer with amplitude regulating circuit through the 3rd filter, the 3rd audio frequency amplification successively; Described mixer output is connected with the recording access of a playback interface circuit and said acoustic processing module respectively.The utility model carries out filtering, amplitude adjusted with the audio frequency of acoustic processing resume module respectively by left and right acoustic channels, then with the microphone collection and also carry out audio mixing through the audio frequency of filtering, amplitude adjusted, can effectively improve the quality of audio frequency behind the audio mixing like this.
In order to let recording circuit have alternative mode; As shown in Figure 2; The output of mixer described in the present embodiment is connected with the recording access of said acoustic processing module through a selection commutation circuit, and the input of said selection commutation circuit also is connected with the output of amplitude regulating circuit with described the 3rd audio frequency amplification.Like this, circuit just has two kinds of recording modes, and a kind of is that voice mixes with background music and records, and in this pattern, the acoustic processing module is when carrying out the A/D conversion and recording, from the output audio signal of left and right acoustic channels output D/A digital-to-analogue conversion to the recording input signal.Another kind is to play background music when only original voice being recorded, and the difference of this pattern and first pattern is that background music only supplies the singer to listen to grasp rhythm through earphone, does not record.
Generally speaking, the recording circuit of the utility model adopts acoustic processing processor time-slotting scanning sample to carry out the method for A/D conversion program (recording) and D/A conversion program (broadcast), just can be recorded and play the effect of carrying out simultaneously on the macroscopic view.According to Shannon's sampling theorem, if the sampling frequency greater than signal frequency more than 2 times (being that timeslice is less than 0.5 times of signal period) get final product reproducing signal, generally get more than 5 times.Its sound-recording function can be recorded in playing back music (accompaniment); And the recording of recording mode under original no background music background; Analog recording canopy environment can be realized: 1, record listening under background music and the voice situation of oneself; Singer's performance that can draw oneself up and sing like this, and record out and mix the good e-file that contracts; 2, under the similarity condition, the singer can select to record out independent voice portions of electronics file, carries out on computers and mixed contracting of the later stage of background music, makes sample.
Here the circuit that is noted that the utility model can be applied to various terminal equipments, MP3 for example, and multimedia equipment and KTV, mobile phone or the like, because circuit structure is simple, each road audio frequency is to carry out independent process, therefore has stronger practicality.
The above is merely the preferred embodiment of the utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to the covering scope of the utility model.

Claims (3)

1. the recording circuit of an analog recording canopy function; Comprise acoustic processing module and microphone interface circuit with recording access, it is characterized in that: the left channel signals output of described acoustic processing module is connected with a mixer with amplitude regulating circuit through first filter, the first audio frequency amplification successively; The right-channel signals output of described acoustic processing module is connected with described mixer with amplitude regulating circuit through second filter, the second audio frequency amplification successively; Described microphone interface circuit is connected with described mixer with amplitude regulating circuit through the 3rd filter, the 3rd audio frequency amplification successively; Described mixer output is connected with the recording access of a playback interface circuit and said acoustic processing module respectively.
2. the recording circuit of analog recording canopy function according to claim 1; It is characterized in that: the output of said mixer is connected with the recording access of said acoustic processing module through a selection commutation circuit, and the input of said selection commutation circuit also is connected with the output of amplitude regulating circuit with described the 3rd audio frequency amplification.
3. the recording circuit of analog recording canopy function according to claim 1 is characterized in that: described acoustic processing module is the built-in sound treatment circuit that MP3 chip, digital microcontroller or DSP mix with analog circuit.
CN2011203035856U 2011-08-19 2011-08-19 Recording circuit capable of imitating recording studio functions Expired - Fee Related CN202218386U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011203035856U CN202218386U (en) 2011-08-19 2011-08-19 Recording circuit capable of imitating recording studio functions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011203035856U CN202218386U (en) 2011-08-19 2011-08-19 Recording circuit capable of imitating recording studio functions

Publications (1)

Publication Number Publication Date
CN202218386U true CN202218386U (en) 2012-05-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011203035856U Expired - Fee Related CN202218386U (en) 2011-08-19 2011-08-19 Recording circuit capable of imitating recording studio functions

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CN (1) CN202218386U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103974184A (en) * 2013-01-24 2014-08-06 华为终端有限公司 Sound channel switching method and device and multimedia equipment
WO2015131591A1 (en) * 2014-09-16 2015-09-11 中兴通讯股份有限公司 Audio signal output method, device, terminal and system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103974184A (en) * 2013-01-24 2014-08-06 华为终端有限公司 Sound channel switching method and device and multimedia equipment
WO2015131591A1 (en) * 2014-09-16 2015-09-11 中兴通讯股份有限公司 Audio signal output method, device, terminal and system

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120509

Termination date: 20130819

C17 Cessation of patent right