CN106504764A - Audio frequency method for early warning and audio frequency prior-warning device - Google Patents

Abstract

The invention provides an audio early warning method, comprising the following steps: a sound capture step, which captures external sounds in real time; a sound analysis step, which separates and analyzes the captured external sound spectrum to determine whether the early warning condition is met; early warning In the output step, the pre-warning action is executed when the pre-warning condition is reached. The technical solution device of the present invention has sound receiving and analyzing functions. When the received sound has a fixed frequency and reaches a certain loudness and a prompt tone that lasts for a period of time, the mobile device directly feeds back to the carrier through earphones and vibrations. an effective early warning method.

Description

Audio warning method and audio warning device

technical field

The present invention relates to audio processing technology.

Background technique

In daily outdoor life, there are many head-down people whose vision is focused on the mobile platform, or music lovers whose hearing is occupied by headphones, or people with visual and hearing impairments, all of which are prone to cause traffic accidents. A known prior art is to detect the volume of a specific external environment through a device, and send an alarm when the volume reaches a certain value. Its disadvantage is the existence of various noises in the external environment, and judging the volume is obviously not in line with the use in actual occasions, and it is impossible to accurately distinguish dangerous sound signals in the external environment.

Contents of the invention

Aiming at the problems in the prior art, the purpose of the present invention is to capture and separate effective sound frequency bands, and remind users of external emergencies through earphones or vibrations.

In order to achieve the above object, the present invention provides an audio early warning method, comprising the following steps: a sound capturing step, capturing the external sound in real time; a sound analyzing step, performing audio separation and audio analysis on the captured external sound spectrum to determine whether Pre-warning condition is reached; the pre-warning output step is to execute the pre-warning action when the pre-warning condition is reached.

A further improvement of the present invention is that the audio separation includes removing random interference noise from the captured external sound spectrum and retaining the periodic signal, then separating the frequency spectrum into single-frequency signals, and separating them into audio frequency signals with the same frequency, continuous time, and volume. Single-frequency band Fx(F1…) of eigenvalues.

A further improvement of the present invention lies in that the audio analysis includes filtering out effective spectrums whose frequencies are greater than a predetermined standard frequency from the single-frequency band Fx (F1 . . . ).

A further improvement of the present invention is that the audio analysis includes screening the effective frequency spectrum from the single-frequency band Fx(F1...) whose duration is longer than a predetermined standard continuous time.

A further improvement of the present invention lies in that the audio analysis includes screening the effective frequency spectrum whose volume is greater than a predetermined standard volume from the single-frequency band Fx (F1 . . . ).

A further improvement of the present invention is that the warning condition includes whether there is a periodic signal in the frequency spectrum.

A further improvement of the present invention is that the sound analysis step includes judging whether the frequency spectrum includes audio for warning.

According to another aspect of the present invention, an audio warning device is provided, which adopts the above-mentioned audio warning method, and it includes: a sound capture unit, which captures external sounds in real time; Audio separation and audio analysis to judge whether the warning condition is reached; the warning unit executes the warning action when the warning condition is reached.

According to another aspect of the present invention, there is provided an earphone with an alarm function, which adopts the above-mentioned audio warning method, and it includes: a microphone for capturing external sounds in real time; Audio separation and audio analysis to determine whether the warning condition is reached; the speaker outputs an audio warning signal when the warning condition is reached.

According to another aspect of the present invention, a smart device with an alarm function is provided, which adopts the above-mentioned audio warning method, and it includes: a microphone for capturing external sounds in real time; a computing unit for capturing the captured external sound spectrum Perform audio separation and audio analysis to determine whether the warning condition is met; the vibrator outputs a vibration warning signal when the warning condition is reached; and the earphone connected to the smart device outputs an audio warning signal when the warning condition is reached.

The technical solution device of the present invention has sound receiving and analyzing functions. When the received sound has a fixed frequency and reaches a certain loudness and a prompt tone that lasts for a period of time, the mobile device directly feeds back to the carrier through earphones and vibrations. an effective early warning method.

Description of drawings

Figure 1 depicts the schematic diagram of the audio warning method according to the present invention.

detailed description

The preferred embodiments of the present invention are described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

Referring to accompanying drawing 1, audio prewarning method of the present invention mainly comprises the following steps: sound capturing step, is used for capturing external sound in real-time; Judging whether an early warning condition is reached; the early warning output step is used to execute an early warning action when the early warning condition is reached, and the early warning action includes outputting an audio early warning signal or a vibration early warning signal. This technology is mainly aimed at people who bow their heads and ignore traffic conditions in reality, or music lovers whose hearing is occupied by headphones, or it can be considered for the elderly, hearing, and visual impairments on portable devices.

According to the above method, an audio early warning device is provided, which adopts the above audio early warning method, and it includes: a sound capture unit, which captures external sounds in real time; Judging whether the early warning condition is reached; the early warning unit executes the early warning action when the early warning condition is reached.

In one embodiment, it is embodied as a smart device with an alarm function, which adopts the above audio early warning method, which includes: a microphone, which captures external sounds in real time; Analysis to determine whether the early warning condition is reached; the vibrator outputs a vibration early warning signal when the early warning condition is reached; and the earphone connected to the smart device outputs an audio early warning signal when the early warning condition is reached.

In another embodiment, it is embodied as an earphone with an alarm function, which adopts the above audio warning method, and it includes: a microphone, which captures external sounds in real time; Analysis to determine whether the warning condition is reached; the speaker outputs an audio warning signal when the warning condition is reached.

In another embodiment, it is embodied as a mobile device with an alarm function, which includes: a microphone for capturing external sounds in real time; an arithmetic unit for audio separation and audio analysis of the captured external sound spectrum to determine whether the Pre-warning conditions: speaker and vibrator, output audio pre-warning signal or vibration pre-warning signal when the pre-warning condition is reached.

Specifically, the technical solution device of the present invention has sound receiving and analysis functions, and the conditions for this function to have a switch and earphone access include any wired or wireless earphone access). When the received sound is of a fixed frequency, and reaches a certain loudness and the prompt tone lasts for a period of time, it is an effective early warning method to directly feed back to the carrier through the earphone and vibration through the mobile device.

For sound capture, there are two external sound source capture modes. When the headset has a microphone, the microphone is used first to collect signals; when the headset and microphone cannot be used at the same time, the microphone of the mobile device is used to collect signals.

After capturing various external sounds, audio separation is performed. Audio separation includes removing random interference noise from the captured external sound spectrum and retaining periodic signals, and then separating the single-frequency signal from the spectrum to have the same frequency, continuous time, and volume. The single-frequency band Fx(F1…) of the eigenvalues.

First, audio analysis is performed to filter out the frequency spectrum within the standard range as the effective spectrum. The audio analysis includes screening out the effective spectrum with a frequency greater than the predetermined standard frequency from the single-frequency band Fx(F1...), when (F(x)>standard Frequency (Fo) is defined as the effective frequency band; expression: Fx>Fo(True:Flase).

Secondly, set the standard continuous time. If the time is less than the standard value, it is qualified as an invalid spectrum. The audio analysis includes screening the effective spectrum from the single-frequency band Fx (F1...) whose duration is greater than the predetermined standard continuous time, and To is the standard value. , when (T> To), it is determined to be valid. Assume that the standard time is 1s. But when the continuous time is greater than 1s, it is recorded as an effective spectrum.

Finally, the volume analysis is performed. The volume varies with the distance between the sound source and the receiving electronic device, resulting in a different volume level of the receiving device. The volume source that is too far or too small needs to be ignored. According to the principle of sound and distance, the volume If it is too small, it will not be a warning sound; it is valid only when the external single-frequency volume is greater than the standard value, and the effective frequency spectrum with a volume greater than the predetermined standard volume is screened from the single-frequency band Fx (F1...).

The above embodiments are only to illustrate the technical concept and characteristics of the present invention. All equivalent changes or modifications are within the protection scope of the present invention.

Claims (10)

1. An audio warning method, characterized in that: comprises the following steps: The sound capture step is to capture the external sound in real time; The sound analysis step is to perform audio separation and audio analysis on the captured external sound spectrum to determine whether the early warning condition is met; In the early warning output step, the early warning action is executed when the early warning condition is reached. 2. audio early warning method according to claim 1, is characterized in that: described audio frequency separation comprises removing random interference noise and retaining periodic signal after the outside sound spectrum of capturing, spectrum is done the separation of single-frequency signal, separates It is a single-frequency band Fx (F1...) having the characteristic values of the same frequency, continuous time, and volume. 3. The audio early warning method according to claim 2, characterized in that: said audio analysis includes screening out effective spectrums whose frequency is greater than a predetermined standard frequency from the single-frequency band Fx (F1 . . . ). 4. The audio early warning method according to claim 2, characterized in that: said audio analysis includes screening effective spectrums whose duration is greater than a predetermined standard continuous time from the single-frequency band Fx (F1...). 5. The audio early warning method according to claim 1, characterized in that: said audio analysis includes screening effective frequency spectrums whose volume is greater than a predetermined standard volume from the single-frequency band Fx (F1 . . . ). 6. The audio warning method according to claim 1, wherein the warning condition includes whether there is a periodic signal in the frequency spectrum. 7. The audio warning method according to claim 1, characterized in that: said sound analysis step includes judging whether the frequency spectrum includes audio for warning. 8. An audio early warning device, characterized in that the audio early warning method according to any one of claims 1 to 7 is adopted, comprising: The sound capture unit captures the external sound in real time; The computing unit performs audio separation and audio analysis on the captured external sound spectrum to determine whether the early warning condition is met; The early warning unit executes the early warning action when the early warning condition is reached. 9. An earphone with alarm function is characterized in that, the audio early warning method according to any one of claims 1 to 7 is adopted, and it comprises: Mike, real-time capture of external sounds; The computing unit performs audio separation and audio analysis on the captured external sound spectrum to determine whether the early warning condition is met; The loudspeaker outputs an audio warning signal when the warning condition is reached. 10. An intelligent device with an alarm function, characterized in that, the audio warning method according to any one of claims 1 to 7 is adopted, and it comprises: Mike, real-time capture of external sounds; The computing unit performs audio separation and audio analysis on the captured external sound spectrum to determine whether the early warning condition is met; A vibrator that outputs a vibration warning signal when the warning condition is reached; and The earphone connected with the smart device outputs an audio warning signal when the warning condition is reached.