CN101771390B - Sound output and input system and its volume output adjustment method - Google Patents

Abstract

The invention discloses a sound input and output system and a volume output adjusting method thereof, which are used for automatically adjusting the volume of sound listened by a speaker according to the sound of speaking of the speaker.

Description

Sound output and input system and its volume output adjustment method

technical field

The present invention relates to a loudspeaker sound adjustment technology, and in particular to a system and method for automatically adjusting volume.

Background technique

In today's era of rapid technological development, portable electronic devices have become an indispensable part of modern people's daily life. For example, mobile phones, with their features such as thin, light, small, and easy to carry, allow modern people to communicate with others by phone anytime, anywhere, which is quite convenient.

However, with existing mobile phones, when the general user uses the mobile phone to communicate with other people, he must put the calling end of the mobile phone close to the ear to hear the voice of the caller on the other side. And when the user is in a noisy environment, such as the side of the road, because of the noisy sound of automobiles and motorcycles, or the voice of the call from the other party is too low, the natural reaction of the user is to increase the volume of his speech first, If you feel that you can hear the voice of the other party, you will naturally lower your speaking volume. Or, the mobile phone will be provided with a volume adjustment button of the loudspeaker. When the user still cannot hear the voice of the other party clearly, the user will press the volume adjustment button to increase the volume of the speaker of the mobile phone. During the process, the user holds the mobile phone with one hand close to the face to talk, and the other hand may not be able to press the volume adjustment button correctly, which is inconvenient for the user.

Contents of the invention

The technical problem to be solved by the present invention is to solve the problem that the user must adjust the volume of the loudspeaker by himself in the existing mobile phone, and the user must always adjust the appropriate call volume. The present invention provides a sound input and output system and its volume output adjustment method .

The invention discloses a sound input and output system, including:

a receiver for continuously receiving an input sound;

A sound processor, electrically connected to the receiver, receives the input sound, performs sound sampling processing on the input sound and filters the noise of the sound, and divides the input sound into a first interval sound according to the length of time and analyzes it to obtain a first reference value and a second interval sound and analyze them to obtain a second reference value, and use the difference between the first reference value and the second reference value as a sound change value;

a speaker for emitting an output sound; and

A volume adjuster is electrically connected to the speaker and the sound processor, and the volume adjuster adjusts the volume of the output sound according to the sound change value.

Each of the reference values is obtained by calculating the average value of the volume sum of the sounds in each interval through the sound processor, so as to obtain each of the reference values.

The adjustment of the volume of the output sound is to adjust the volume of the output sound currently emitted by the speaker according to the sound change value.

The invention also discloses a volume output adjustment method applied to the sound input and output system, which includes the following steps:

Continuously capture an input sound;

Sampling the input sound;

filtering the noise of the input sound after sampling;

distinguishing the input sound as a first interval sound and a second interval sound;

calculating the average value of the volume sum of the sounds in each interval to obtain a first reference value and a second reference value;

calculating the difference between the first reference value and the second reference value to obtain a sound change value;

adjusting the volume of an output sound according to the sound change value; and

Make that output sound.

The adjustment of the volume of the output sound is to adjust the current volume of the output sound according to the sound change value.

The electronic device capable of automatically adjusting the output volume and the method thereof disclosed in the present invention automatically adjust the volume of the mobile phone by analyzing the volume change of the speaker's voice, so that the user does not need to manually adjust the volume, and can be used in various Different speaking environments can be used to obtain an appropriate call volume, so that users can talk smoothly.

Description of drawings

The circuit block diagram of the sound output input system of Fig. 1 embodiment of the present invention;

FIG. 2 is a flow chart of a volume output adjustment method according to an embodiment of the present invention.

Among them, reference signs:

100 sound input and output system

110 radio

120 sound processor

130 volume adjuster

140 speakers

Detailed ways

The sound input and output system and its volume output adjustment method disclosed in the present invention are applied to an electronic device with a loudspeaker and a microphone. In the following detailed description of the present invention, a mobile phone will be used as the description of the embodiment of the present invention, but the drawings are only for reference and illustration, and are not intended to limit the present invention.

Please refer to FIG. 1 , as shown in the figure is a circuit block diagram of the sound input and output system of the present invention. The sound input and output system 100 of the present invention includes a microphone 110 , a sound processor 120 , a volume adjuster 130 and a speaker 140 . The microphone 110 is electrically connected to the sound processor 120. The microphone 110 continuously receives an input sound from a user, and converts the input sound into a series of signals with voltage changes, that is, an analog signal. The sound processor 120 receives and extracts a series of analog signals, and converts them into a series of digital signals. According to the sampling theorem, the sampling frequency must be greater than twice the sampled frequency, and twice the frequency domain of the human voice will be higher than 1043HZ and frequencies lower than 82HZ are filtered out, and signals with too low energy are regarded as noise removal. Then, according to the total time length, the digitized input sound is evenly divided into a first interval sound and a second interval sound. The sound processor 120 obtains the volume sum of the sound in the first interval, and calculates it with the total time length of the sound in the first interval. The obtained average volume value of each time is a first reference value, and so on to obtain a second reference value. The reference value, and then calculating the first reference value and the second reference value to obtain a sound change value.

The volume adjuster 130 is electrically connected to the sound processor 120 and the speaker 140. The sound processor 120 converts the digital signal into an analog signal, and emits the sound represented by the analog signal through the speaker 140. The volume adjuster 130 receives and controls the sound according to the change value of the sound. The volume of the output sound from the speaker 140 can be controlled to increase or decrease the volume of the current output sound, so that the user can clearly hear the voice of the other caller.

Wherein, when the first reference value is greater than the second reference value, so that the obtained sound change value is positive, then reduce the volume of the output sound; when the first reference value is smaller than the second reference value, the obtained sound change value is negative When the first reference value is equal to the second reference value, so that the obtained sound change value is zero, the volume of the output sound is not adjusted.

Please refer to FIG. 2 , which is a flow chart of the volume output adjusting method of the present invention, which is applied to a sound input and output system. A radio continuously receives an input sound and converts it into a series of analog signals. A sound processor receives and extracts a series of analog signals and converts them into a series of digital signals (step 1). According to the sampling theorem, the sampling frequency must be greater than Twice the sampling frequency, twice the frequency domain of the human voice, filter out frequencies above 1043HZ and below 82HZ (step 2), and remove signals with too low energy as noise (step 3) According to the total time length, the input sound converted into digitization is equally divided into a first interval sound and a second interval sound (step 4). The sound processor obtains the sum of the volume of the sound in the first interval, and calculates it with the total time length of the sound in the first interval, and the obtained average volume value of each time is a first reference value, and so on to obtain a second reference value (step 5), then calculate the first reference value and the second reference value, to obtain a sound change value (step 6), a volume adjuster receives and adjusts the volume of a current output sound according to the sound change value (step 7) , with the adjustment of the volume adjuster, the speaker changes the volume of the output sound (step 8).

Wherein, when the first reference value is greater than the second reference value, so that the obtained sound change value is positive, then reduce the volume of the output sound; when the first reference value is smaller than the second reference value, the obtained sound change value is negative When the first reference value is equal to the second reference value, so that the obtained sound change value is zero, the volume of the output sound is not adjusted. In addition, when the volume of the output sound is adjusted to the maximum, the volume will not be increased; when the volume of the output sound is adjusted to the minimum, the volume will not be decreased.

Although step 2 to step 4 are described above in sequence, it is not a limitation of the present invention. In actual operation, the execution sequence of the above steps can be adjusted appropriately.

To sum up, compared with the prior art, the voice input and output system disclosed in the present invention and its volume output adjustment method can automatically adjust the volume of a mobile phone call by identifying the volume change of the voice of the speaker. Obtain an appropriate call volume in various speaking environments, so that users can talk smoothly without manual adjustment.

Claims (3)

1. A sound input and output system, characterized in that it comprises: a receiver for continuously receiving an input sound; A sound processor, electrically connected to the receiver, receives the input sound, performs sound sampling processing on the input sound and filters the noise of the input sound after the sound sampling processing, and filters the input sound after the noise filtering The sound is equally divided into a first interval sound and a second interval sound according to the total time length, and the first interval sound is analyzed to obtain a first reference value, and the second interval sound is analyzed to obtain a second reference value, And use the difference between the first reference value and the second reference value as a sound change value, wherein the first reference value is the average value obtained by calculating the volume sum and total time length of the sound in the first section by the sound processor. The volume value of time, the second reference value is the average volume value per time obtained by calculating the volume sum of the second interval sound and the total time length by the sound processor; a speaker for emitting an output sound; and A volume adjuster is electrically connected to the speaker and the sound processor, and the volume adjuster adjusts the volume of the output sound to be emitted by the speaker according to the sound change value. 2. A volume output adjustment method applied to sound input and output systems, characterized in that, comprising the following steps: Continuously capture an input sound; Sampling the input sound; filtering the noise of the input sound after sampling; Distinguishing the noise-filtered input sound into a first interval sound and a second interval sound on average according to the total time length; Calculating the volume sum of the sounds in the first interval and the average volume value per time obtained by the total time length to obtain a first reference value, and calculating the average volume value for each time obtained by calculating the sum of the volumes of the sounds in the second interval and the total time length time volume value to obtain a second reference value; calculating the difference between the first reference value and the second reference value to obtain a sound change value; adjusting the volume of an output sound according to the sound change value; and Make that output sound. 3. The volume output adjustment method applied to a sound input and output system according to claim 2, wherein the adjustment of the volume of the output sound is to adjust the volume of the output sound to be emitted according to the sound change value.

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