TW201803365A - Volume adjusting circuit and method - Google Patents

Abstract

The present invention provides a volume adjusting circuit and method. The volume adjusting circuit is configured to adjusting volume of an electronic device. The volume adjusting circuit includes an input terminal, an output terminal, a codec and a processor. The input terminal and the output terminal are electrically connected to the processor by the codec. The input terminal detects an outer sound signal of the environment of the electronic device, converts the sound signal into digital signal, and sends the digital sound signal to the processor. The output terminal outputs an inner sound signal of the electronic device. The processor compares a volume of the outer sound signal with a preset volume and adjusting a volume of the inner sound signal according to the comparison.

Description

Volume adjustment circuit and method

The present invention relates to a volume adjustment circuit and method, and more particularly to a volume adjustment circuit and method for adjusting the volume of an output terminal according to the volume of the input end.

The conventional electronic device usually directly adjusts the volume of the audio signal of the output end (such as the earpiece and the speaker). Specifically, the receiving end of the electronic device generally includes a receiving module and a speaker, and the receiving module receives the electronic device in the communication process. For example, an audio signal of a call, a voice chat, etc., the processor of the electronic device compares the volume of the audio signal with a preset volume, and adjusts the volume of the audio signal according to the comparison result, and is output by the speaker. However, in actual use, the environment in which the electronic device is located also affects the user's listening to the sound signal. For example, if the user is in a quiet environment, the volume of the sound signal desired by the user is low, and accordingly, if the user is in a noisy environment, the user The volume of the desired audio signal is high.

In view of the above, it is necessary to provide a volume adjustment circuit that adjusts the volume of the output according to the volume of the input.

In addition, it is necessary to provide a corresponding volume adjustment method of the above volume adjustment circuit.

a volume adjustment circuit for adjusting an output volume of an electronic device, the volume adjustment circuit package input end, an output end, a codec and a processor, wherein the input end and the output end are connected to the processor via the codec, The input end detects the sound signal of the environment in which the electronic device is located, and converts the detected sound signal into a digital signal and transmits the detected sound signal to the processor; the output terminal outputs an internal sound signal of the electronic device; the processor compares the detected signal Measure the volume of the sound signal and the preset volume value, and adjust the volume of the sound signal output by the output according to the comparison result.

A volume adjustment method for adjusting an output volume of an electronic device, the method comprising the steps of:

Detecting an audio signal of an external environment in which the electronic device is located;

Converting the detected sound signal into a digital signal;

Comparing the volume of the detected sound signal with the preset volume value;

Adjusting the volume of the sound signal output by the electronic device according to the comparison result.

The volume adjustment circuit of the present invention can detect the volume of the sound signal of the external environment through the input end, and adjust the volume of the sound signal output by the input end according to the volume of the detected sound signal.

1 is a functional block diagram of a volume adjustment circuit according to a first preferred embodiment of the present invention.

2 is a flow chart showing the operation of the volume adjustment circuit of the first preferred embodiment of the present invention.

3 is a functional block diagram of a volume adjustment circuit in accordance with a second preferred embodiment of the present invention.

4 is a flow chart showing the operation of a volume adjustment circuit in accordance with a second preferred embodiment of the present invention.

Referring to FIG. 1, a volume adjustment circuit 100 according to a first preferred embodiment of the present invention is configured to adjust an output volume of an electronic device. The volume adjustment circuit 100 includes an input terminal 10, an output terminal 20, a codec 30, and a processor 50. The input terminal 10 and the output terminal 20 are electrically connected to the processor 50 via the codec 30. In the preferred embodiment, the electronic device is taken as an example of a mobile phone.

The input terminal 10 includes a microphone 11 and an A/D converter 13. The microphone 11 detects an audio signal of an external environment where the electronic device is located, and the A/D converter 13 converts the detected audio signal into a digital signal and transmits the detected audio signal to the processor 50.

The output terminal 20 is configured to output an internal sound signal of the electronic device, and the output terminal 20 includes a D/A converter 21 and an earpiece 23. In the preferred embodiment, the internal audio signal is an audio signal received by the electronic device from a remote end 70 (eg, another mobile phone), such as an audio signal during a call, or an audio signal in a voice chat. The D/A converter 21 receives the internal audio signal through the codec 30 and converts it into an analog sound signal, which is transmitted to the handset 23 for output.

The codec 30 is used for encoding and decoding the audio signal. Specifically, the codec 30 performs encoding and decoding processing on the internal audio signal of the electronic device or the audio signal that the electronic device needs to transmit to the remote end. The codec 30 is further used for volume adjustment. In the preferred embodiment, the codec 30 adjusts the volume by adjusting the gain. Specifically, the codec 30 correspondingly increases the volume or decreases the volume by increasing the negative gain or the positive gain.

The processor 50 is configured to compare the volume of the detected sound signal with the preset volume value, and adjust the volume of the sound signal output by the output according to the comparison result. In the preferred embodiment, if the volume of the detected sound signal is less than the preset volume value, the processor 50 controls the codec 30 to decrease the volume of the output signal output by the output terminal 20. For example, when the electronic device is in a quiet environment, such as a conference room or a classroom, the volume of the sound signal detected by the microphone 11 is relatively low, and the processor 50 determines that the volume of the detected sound signal is lower than a normal condition (ie, The set volume value is controlled to reduce the volume of the output audio signal by the codec 30 to prevent the sound of the earpiece 23 from being too large, affecting the conference or teaching.

If the volume of the detected sound signal is greater than the preset volume value, the processor 50 controls the codec 30 to increase the volume of the output signal output by the output terminal 20. For example, when the electronic device is in a noisy environment, such as a station, the volume of the sound signal detected by the microphone 11 is relatively high, and the processor 50 determines that the volume of the detected sound signal is higher than a normal condition (ie, a preset volume). The value is controlled to increase the volume of the output audio signal by the codec 30 to prevent the user from listening to the sound of the earpiece 23 normally.

If the volume of the detected sound signal is equal to the preset volume value, the processor 50 does not adjust the volume of the output audio signal of the output terminal 20.

It can be understood that if the volume of the detected sound signal is greater than the preset volume value, the processor 50 can also adjust the volume of the output audio signal of the output terminal 20.

It can be understood that the preset volume value can be customized by the user according to the usage habit and stored in the storage device in the electronic device.

Referring to FIG. 2, the workflow of the volume adjustment circuit 100 of the first preferred embodiment of the present invention includes the following steps:

In step 301, the microphone 11 detects an audio signal of an external environment where the electronic device is located.

In step 302, the A/D converter 13 converts the detected audio signal into a digital signal and transmits it to the processor 50.

Step 303: The processor 50 compares the volume of the detected sound signal with the preset volume value, and adjusts the volume of the sound signal output by the output according to the comparison result. In the preferred embodiment, if the volume of the detected sound signal is less than the preset volume value, proceed to step 304, and if the volume of the detected sound signal is greater than the preset volume value, proceed to step 305 if the detected The volume of the sound signal is equal to the preset volume value, and the processor 50 does not adjust the volume of the output signal of the output terminal 20.

Step 304, the processor 50 controls the codec 30 to reduce the volume of the output signal of the output terminal 20, for example, when the electronic device is in a quiet environment, such as a conference room or a classroom, the sound signal detected by the microphone 11 The volume of the sound signal is relatively low, and the processor 50 determines that the volume of the detected sound signal is lower than a normal condition (ie, a preset volume value), and then controls the codec 30 to reduce the volume of the output sound signal to avoid the sound of the earpiece 23. Too big to influence meetings or teaching.

Step 305, the processor 50 controls the codec 30 to increase the volume of the output signal output by the output terminal 20. For example, when the electronic device is in a noisy environment, such as a station, the volume of the sound signal detected by the microphone 11 is relatively high, and the processor 50 determines that the volume of the detected sound signal is higher than a normal condition (ie, a preset volume). The value is controlled to increase the volume of the output audio signal by the codec 30 to prevent the user from listening to the sound of the earpiece 23 normally.

Referring to FIG. 3, the volume adjustment circuit 200 of the second preferred embodiment of the present invention is substantially the same as the volume adjustment circuit 100 except that the volume adjustment circuit 200 further includes a channel switching mode connected to the processor 50. Group 60, the electronic device is a smart TV.

The channel switching module 60 is configured to receive a channel switching signal sent by the user, and send the channel switching signal to the processor 50. The processor 50 controls the electronic device to switch channels, and the microphone 11 of the input terminal 10 detects The audio signal of the channel after the switch. The audio signal of the channel after the switching is output from the output terminal 20. The processor 50 determines the audio signal of the switched channel and the preset volume value, and adjusts the audio signal of the switched channel according to the comparison result. Therefore, even if the user switches channels, each channel will have a different volume, and it can be automatically adjusted to an appropriate volume at the time of output.

Referring to FIG. 4, the workflow of the volume adjustment circuit 200 of the second preferred embodiment of the present invention is substantially the same as that of the volume adjustment circuit 100. The difference is that the volume adjustment circuit 200 further includes the following steps:

In step 300 before step 301, the channel switching module 60 receives the channel switching signal, and the processor 50 controls the electronic device to switch channels according to the channel switching signal.

The volume adjustment circuit 100, 200 of the present invention can detect the volume of the sound signal of the external environment through the input terminal 10, and adjust the volume of the sound signal output by the output terminal 20 according to the volume of the detected sound signal.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

100, 200‧‧‧ volume adjustment circuit

10‧‧‧ input

11‧‧‧Microphone

13‧‧‧A/D converter

20‧‧‧ Output

21‧‧‧D/A converter

23‧‧‧ earpiece

30‧‧‧Codec

50‧‧‧ processor

60‧‧‧Channel Switching Module

70‧‧‧ distal

no

100‧‧‧Volume adjustment circuit

10‧‧‧ input

11‧‧‧Microphone

13‧‧‧A/D converter

20‧‧‧ Output

21‧‧‧D/A converter

23‧‧‧ earpiece

30‧‧‧Codec

50‧‧‧ processor

70‧‧‧ distal

Claims (10)

A volume adjustment circuit for adjusting an output volume of an electronic device, wherein the volume adjustment circuit comprises an input end, an output end, a codec and a processor, wherein the input end and the output end are coupled to the codec The processor is electrically connected, and the input end detects an audio signal of the environment where the electronic device is located, and converts the detected sound signal into a digital signal and transmits the detected sound signal to the processor; the output end outputs an internal sound signal of the electronic device; The processor compares the volume of the detected sound signal with the preset volume value, and adjusts the volume of the sound signal output by the output according to the comparison result. The volume adjustment circuit of claim 1, wherein if the volume of the detected sound signal is greater than a preset volume value, the processor controls the codec to increase the volume of the output audio signal. The volume adjustment circuit of claim 1, wherein if the volume of the detected sound signal is less than a preset volume value, the processor controls the codec to decrease the volume of the output audio signal. The volume adjustment circuit of the first aspect of the invention, wherein the volume adjustment circuit further comprises a channel switching module connected to the processor, the channel switching module receiving a channel switching signal sent by the user, and The channel switching signal is sent to the processor, and the processor controls the electronic device to switch channels. The input terminal detects the sound signal of the switched channel, and the sound signal of the switched channel is output from the output terminal. The volume adjustment circuit of claim 1, wherein the output audio signal of the output is an audio signal received by the electronic device from a remote end. A volume adjustment method for adjusting an output volume of an electronic device, the improvement comprising the following steps: Detecting an audio signal of an external environment in which the electronic device is located; Converting the detected sound signal into a digital signal; Comparing the volume of the detected sound signal with the preset volume value; Adjusting the volume of the sound signal output by the electronic device according to the comparison result. The volume adjustment method according to claim 6, wherein if the volume of the detected sound signal is greater than a preset volume value, the control reduces the volume of the output sound signal. The volume adjustment method according to claim 6, wherein if the volume of the detected sound signal is less than a preset volume value, the control increases the volume of the output sound signal. The volume adjustment method of claim 6, wherein the method further comprises: before detecting the sound signal of the external environment of the electronic device, receiving a channel switching signal, and controlling the electronic device according to the channel switching signal Switching channels, the detected sound signal is the channel sound signal after the switching. The volume adjustment method of claim 6, wherein the output audio signal is an audio signal received by the electronic device from a remote end.