KR19990084713A - Audio tone changer according to the surrounding environment - Google Patents

Abstract

According to the present invention, in consideration of the characteristics of the human being whose heart is changed by the surrounding environmental elements, the characteristics of the surrounding environmental elements such as illuminance are sensed, and the tone of the audio to be reproduced and output is appropriately set according to the detected characteristics. An apparatus for changing an audio tone according to an ambient environment, comprising: a mixer (10, 20, 30) for mixing the stereo signal on a transmission path of an audio signal output in both left (L) and right (R) directions; Phase shifters 11 and 21 for phase shifting the respective audio signals which are first mixed left and right and output; A photo sensor 5 for sensing an external illuminance of the surrounding environment and passing a current corresponding thereto; An A / D converter (7) for converting a change voltage caused by the current of the optical sensor (5) into digital data; Variable amplifiers 13 and 23 for variably amplifying respective audio signals output from the mixer 30 of the final stage; Low and high frequency variable filters 112 and 122 having variable filter bands; And a MICOM (100) for receiving the voltage data to vary the filter bands of the band variable filters (112, 122) and to variably adjust the amplification characteristics of the variable amplifiers (13, 23). It is a useful invention that can be adjusted to suit the environmental atmosphere of the atmosphere and thereby induces the enjoyment of music.

Description

Audio tone changer according to the surrounding environment

The present invention relates to an audio output device that outputs audio tones in accordance with the surrounding environment. More particularly, the present invention relates to an environment such as illuminance in consideration of the characteristics of a human being whose heart diameter is changed by the surrounding environment. The present invention relates to an audio timbre changing device according to the surrounding environment for sensing a characteristic and variably setting the timbre of audio to be reproduced and outputted according to the sensed characteristic.

1 is a block diagram of a conventional stereophonic audio output device, comprising: mixers 10, 20, and 30 for mixing the stereo signals on a transmission path of audio signals output in both left and right directions; Phase shifters 11 and 21 for phase shifting the respective audio signals which are first mixed left and right and output; And a low pass filter 12 and a high pass filter 22 for low and high pass filtering the audio signals output by the secondary mixing after the phase shift, respectively.

In the conventional stereophonic audio output device configured as described above, the left and right stereo audio signals reproduced by the user's audio listening request are mixed with each other by the mixer 10, and then the phase shifters 11 and 21 are used. Each of them is applied to the phase shifter to output a delay with a slight time difference. Each of the delayed audio signals is remixed by a mixer 20 at a later stage and then divided into low and high frequency components while passing through the low frequency filter 12 and the high frequency filter 22, respectively. The separated audio signal is remixed by the mixer 30 of the final output stage and then output to each path to allow the user to listen to the stereo sound.

However, the conventional stereophonic audio output device configured and operated as described above performs uniform audio signal processing as described above for the playback songs, regardless of the surrounding environmental factors, namely, temperature, humidity, wind, and illumination. As a result, the reproduction of the reproduction song is performed far from the inspiration of the listener affected by the environmental factors, which causes the listener to be more innocent of the reproduction song.

Accordingly, an object of the present invention is to provide an audio timbre changing device according to the surrounding environment, which is created to solve the above problems and senses the surrounding environment element and changes the timbre of the audio output accordingly. .

1 is a block diagram of a conventional stereophonic audio output device,

Figure 2 is a block diagram of an embodiment of an audio tone control apparatus according to the environment according to the present invention.

※ Explanation of code for main part of drawing

5: Photo Sensor 7: A / D Converter

10,20,30: Mixer 11,21: Phase Shifter

12: low pass filter 13,23: variable amplifier

22: high pass filter 100: MICOM

112: low pass variable filter 122: high pass variable filter

According to an aspect of the present invention, there is provided an apparatus for changing an audio tone according to an environment, the apparatus comprising: sensing means for sensing an external illuminance; Filtering means for filtering an input audio signal; And control means for variably controlling the filter characteristics for each band of the filter means according to the sensed ambient illuminance.

In the audio tone variable apparatus according to the surrounding environment according to the present invention configured as described above, first, when the sensing means detects the characteristics of an arbitrary environmental element, and transmits the sensed characteristics to the control means, the control means receives. According to the detected characteristic value, the filter characteristic for each band of the filter means is variably set, and the audio whose tone is changed according to an external environment element is reproduced and output.

Hereinafter, the configuration and operation of a preferred embodiment of an audio tone control apparatus according to the surrounding environment according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a schematic diagram of an embodiment of an apparatus for changing an audio timbre according to an exemplary embodiment of the present invention, in addition to the same configuration as that of FIG. 1, an optical sensor for sensing an external illuminance among the surrounding elements and flowing a current corresponding thereto. photo sensor 5; An A / D converter (7) for converting a change voltage caused by the current of the optical sensor (5) into digital data; Variable amplifiers 13 and 23 for variably amplifying respective audio signals output from the mixer 30 of the final stage; Low and high frequency variable filters 112 and 122 whose filter bands are variable; And a microcomputer (MICOM) 100 configured to receive the voltage data to vary the filter bands of the band variable filters 112 and 122 and to variably adjust the amplification ratios of the variable amplifiers 13 and 23.

In the audio tone variable apparatus according to the surrounding environment according to the present invention configured as described above, first, when the external surrounding environment is dark due to weather or lighting, the size of light detected by the optical sensor 5 is weak, thereby making it small. A current of a magnitude is flowed so that a high voltage is applied to the A / D converter 7 to digitally convert the external signal to the microcomputer 100.

Accordingly, the microcomputer 100 transmits a control signal for setting the resonance frequency for filtering the mixed audio signal after the phase shift to a lower value according to the magnitude of the voltage data applied thereto. The high frequency variable filter 122 is applied to the variable frequency filter 122, and at the same time, a control signal for reducing the amplification factor is applied to the variable amplifiers 13 and 23, respectively. By the setting process, the low frequency component of the reproduced output audio signal is made more remarkable than the high frequency component, and at the same time, the overall volume is alleviated slightly, so that the tone of the reproduced song is reduced to the user's calm and sentimental feeling due to low illumination. Will be matched.

Contrary to the above, when the external environment is bright, the microcomputer 100, which is sensed by the optical sensor 5 and receives low voltage data digitally converted by the A / D converter 7, is described above. In contrast to the process, by applying and setting the control signal for setting the resonant frequency to a high value to the low and high frequency variable filters (112, 122), and applying the control signal for increasing the amplification rate to the variable amplifier (13, 23), By making the reproduced audio more in line with the user's lively feeling due to the high illumination, the listener is even more intrigued by the music.

Unlike the above-described embodiment, in the case of installing a sensor for sensing humidity instead of the optical sensor 5, by recognizing rainy weather or the like and changing the tone to match the atmosphere of the song, it is possible to inspire the listener. Of course, it can be more consistent.

The audio timbre changing device according to the surrounding environment configured and operated as described above allows the tone of the output audio to be variably set according to the surrounding elements of the user of the audio device, thereby adjusting the tone according to the surrounding environmental atmosphere and thereby It is a useful invention that allows you to enjoy listening to music.

Claims (2)

Sensing means for sensing external illuminance; Filtering means for filtering an input audio signal; And And a control means for variably controlling the filter characteristics for each band of the filter means in accordance with the sensed ambient illuminance. The method of claim 1, It further comprises amplifying means for amplifying and outputting the filtered audio signal, The control means, variable in accordance with the surrounding environment, characterized in that for adjusting the output level of the amplifying means based on the characteristics of the detected environmental element.