CN105812971A - Distortion prevention type sound picking and buffering system and method for preventing distortion - Google Patents

Abstract

Provided is an anti-distortion and time-sensitive pickup buffer system, comprising: a pickup; a buffer, connected to the pickup, and storing an analog signal output by the pickup; a delayer; a sound card; an abnormal current detector, connected to the buffer, and detecting the pickup The abnormal current signal during the sound process, the abnormal current detector includes a normal current signal output port and an abnormal current signal output port, the normal current signal output port is connected to the sound card, and the abnormal current signal output port is connected to the sound card through a delayer. The invention also provides an anti-distortion method of the anti-distortion and time difference sound pickup buffer system. The anti-distortion method of the anti-distortion differential time pick-up and buffer system provided by the present invention firstly separates the sound-pickup analog signal and the current signal before merging, and buffers the analog signal, and after the detection of the abnormal current is correct, then Combine the analog signal and the current signal to avoid the pickup distortion caused by the abnormal current.

Description

Anti-distortion time lag pickup buffer system and its anti-distortion method

technical field

The invention relates to the technical field of audio-visual pickup, in particular to an anti-distortion lagging sound pickup buffer system and an anti-distortion method thereof.

Background technique

The general pickup system consists of a pickup and a sound card. The pickup is a capacitive or electromagnetic pickup microphone, which generates a sound analog signal through a metal film with a physical structure, which is used as a sound source; the sound card converts the analog signal into an electrical signal. However, in the process of recording, some audio distortions are often encountered due to occasional abnormal currents, and it is difficult to make up for them in the later stage.

After specific analysis, the main reasons for the abnormal current are as follows: 1. The unstable power supply of the pickup leads to abnormal current during the pickup process; 2. The abnormal current is caused by the abnormal local coupling envelope resistance of the metal inside each wire; 3. The pickup External factors such as local moisture lead to abnormal current; 4. During the pickup process, the pickup current is abnormal due to the influence of the surrounding magnetic field and static electricity.

Contents of the invention

The purpose of the present invention is to provide an anti-distortion and time-sensitive sound pickup buffer system and an anti-distortion method to solve the problem of partial audio distortion caused by sporadic current abnormalities.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is: provide a kind of anti-distortion time difference pick-up buffer system, comprise: pick-up; Timer; Sound card; Abnormal current detector, connected with the buffer, detects the abnormal current signal in the sound pickup process, the abnormal current detector includes a normal output port of the current signal and an abnormal output port of the current signal, and the current signal The normal output port is connected to the sound card, and the abnormal current signal output port is connected to the sound card through the delayer.

Further, in the anti-distortion and time-sensitive pickup buffer system, the abnormal current detector further includes a low-pass filter.

Further, in the anti-distortion and time-sensitive pickup buffer system, the buffer is a direct-coupled audio buffer for fever.

The present invention also provides an anti-distortion method for an anti-distortion and time-sensitive sound pickup buffer system, comprising: the sound source analog signal is generated by the sound pickup; the buffer stores the sound source analog signal; the abnormal current detector detects the abnormal current signal in the sound pickup process , when the current is lower than the limit value, the analog signal of the sound source passes normally and is output to the sound card for converting the analog signal into a digital signal; when the current is higher than the limit value, the analog signal of the sound source enters the delayer, and the delayer The input analog signal of the sound source performs a delay cycle and delays output until the abnormal current signal disappears.

Further, in the anti-distortion method of the anti-distortion poor time pickup and buffer system, the abnormal current detector includes a low-pass filter, a normal output port of the current signal and an abnormal output port of the current signal, when the current is lower than the limit value , the sound source analog signal is output to the sound card through the current signal normal output port, and when the current is higher than the limit value, the sound source analog signal is output to the delayer through the current signal abnormal output port.

The anti-distortion and time-sensitive sound pickup buffer system provided by the present invention detects the abnormal current signal through the abnormal current detector, and delays the abnormal current signal through the delay device until the abnormal current signal disappears, so as to ensure that the analog signal is consistent with the normal current signal Combined to avoid pickup distortion due to abnormal current.

The anti-distortion method of the anti-distortion differential time pick-up and buffer system provided by the present invention firstly separates the sound-pickup analog signal and the current signal before merging, and buffers the analog signal, and after the detection of the abnormal current is correct, then Combine the analog signal and the current signal to avoid the pickup distortion caused by the abnormal current.

Description of drawings

Below in conjunction with accompanying drawing, invention will be further described:

Fig. 1 is the schematic structural diagram of the anti-distortion time difference pickup buffer system provided by the embodiment of the present invention;

FIG. 2 is a schematic diagram of a circuit structure of a buffer provided by an embodiment of the present invention;

3 is a schematic diagram of a circuit structure of a low-pass filter provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a circuit structure of a delayer provided by an embodiment of the present invention;

FIG. 5 is a schematic flow chart of the steps of the anti-distortion method of the anti-distortion asynchronous sound pickup buffer system provided by the embodiment of the present invention.

detailed description

The following is a further detailed description of the anti-distortion time difference pickup buffer system and its anti-distortion method proposed by the present invention with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and use imprecise ratios, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

The core idea of the present invention is that the anti-distortion and time-sensitive pickup buffer system provided by the present invention detects the abnormal current signal through the abnormal current detector, and delays the abnormal current signal through the delay device until the abnormal current signal disappears, ensuring The analog signal is combined with the normal current signal to avoid pickup distortion due to abnormal current. The anti-distortion method of the anti-distortion differential time pick-up and buffer system provided by the present invention firstly separates the sound-pickup analog signal and the current signal before merging, and buffers the analog signal, and after the detection of the abnormal current is correct, then Combine the analog signal and the current signal to avoid the pickup distortion caused by the abnormal current.

FIG. 1 is a schematic structural diagram of an anti-distortion asynchronous sound pickup buffer system provided by an embodiment of the present invention. With reference to Fig. 1, provide a kind of anti-distortion time difference pickup buffer system, comprise: pickup 11; Buffer 12, be connected with described pickup 11, store the analog signal of described pickup 11 output; Delay device 13; Sound card 14; abnormal current detector 15, connected with the buffer 12, detects the abnormal current signal in the sound pickup process, the abnormal current detector 15 includes the normal output port 151 of the current signal and the abnormal output port 152 of the current signal, the The normal current signal output port 151 is connected to the sound card 14 , and the abnormal current signal output port 152 is connected to the sound card 14 through the delayer 13 .

FIG. 2 is a schematic diagram of a circuit structure of a buffer provided by an embodiment of the present invention. Referring to Figure 2, the buffer is a direct-coupled audio buffer for fever. The pickup is connected to the VDD terminal in the figure, and the abnormal current detector is connected to the V+ terminal in the figure. On this basis, the temporary storage function of the audio analog signal is completed.

FIG. 3 is a schematic diagram of a circuit structure of a low-pass filter provided by an embodiment of the present invention. Referring to Figure 3, the current flow from v terminal input, through the resistor R , if the current is lower than the limit value, the current passes through the negative terminal of the amplifier, directly from v output to the sound card, when the current is higher than the limit value, the current passes through R from v output to the delayer.

FIG. 4 is a schematic diagram of a circuit structure of a delayer provided by an embodiment of the present invention. Referring to Figure 4, when an abnormal current signal is detected, the delay device receives the abnormal current signal output port (v Terminal) output signal and start to work, the input audio analog signal is delayed and looped until the normal current signal is detected again, and the audio analog signal is output.

The present invention also provides an anti-distortion method for an anti-distortion and time-sensitive sound pickup buffer system, comprising: the sound source analog signal is generated by the sound pickup; the buffer stores the sound source analog signal; the abnormal current detector detects the abnormal current signal in the sound pickup process , when the current is lower than the limit value, the analog signal of the sound source passes normally and is output to the sound card for converting the analog signal into a digital signal; when the current is higher than the limit value, the analog signal of the sound source enters the delayer, and the delayer The input analog signal of the sound source performs a delay cycle and delays output until the abnormal current signal disappears.

FIG. 5 is a schematic flow chart of the steps of the anti-distortion method of the anti-distortion asynchronous sound pickup buffer system provided by the embodiment of the present invention. With reference to Fig. 5, the anti-distortion method of the anti-distortion poor time pick-up buffer system includes:

S51, the pickup generates a sound source analog signal;

S52. The buffer stores the audio source analog signal;

S53. The abnormal current detector detects the abnormal current signal in the process of picking up the sound. When the current is lower than the limit value, the analog signal of the sound source passes through normally and is output to the sound card for converting the analog signal into a digital signal. When the current is higher than the limit value , the audio source analog signal enters a delayer, and the delayer performs a delay cycle on the input audio source analog signal and delays output until the abnormal current signal disappears.

In the anti-distortion method of the anti-distortion poor time pickup buffer system, the abnormal current detector includes a low-pass filter, a normal output port of the current signal and an abnormal output port of the current signal, and when the current is lower than a limit value, the The sound source analog signal is output to the sound card through the current signal normal output port, and when the current is higher than the limit value, the sound source analog signal is output to the delayer through the current signal abnormal output port.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (5)

1. an anti-distortion difference time property pickup caching system, it is characterised in that including:

Pick up；

Buffer, is connected with described pick up, stores the analog signals of described pick up output；

Chronotron；

Sound card；

Abnormal current detector, it is connected with described buffer, abnormal current signal in detection pickup process, described abnormal current detector includes current signal normal output mouth and current signal exception output port, described current signal normal output mouth is connected with described sound card, and described current signal exception output port is connected with sound card by described chronotron.

2. anti-distortion difference time property pickup caching system as claimed in claim 1, it is characterised in that described abnormal current detector also includes low pass filter.

3. anti-distortion difference time property pickup caching system as claimed in claim 1, it is characterised in that described buffer is straight coupling fever audio buffer.

4. the anti-distortion method of an anti-distortion difference time property pickup caching system, it is characterised in that including:

Pick up produces source of sound analogue signal；

Buffer stores described source of sound analogue signal；

Abnormal current signal in abnormal current detector detection pickup process, when electric current is lower than limit value, described source of sound analogue signal normal through and export to sound card be simulated signal convert digital signal to, when electric current is higher than limit value, described source of sound analogue signal enters chronotron, the described source of sound analogue signal of input is carried out delay loop and postpones output by chronotron, until abnormal current blackout.

5. the anti-distortion method of anti-distortion difference time property pickup caching system as claimed in claim 4, it is characterized in that, described abnormal current detector includes low pass filter, current signal normal output mouth and current signal exception output port, when electric current is lower than limit value, described source of sound analogue signal is by current signal normal output mouth output to sound card, when electric current is higher than limit value, described source of sound analogue signal is by current signal exception output port output to chronotron.