KR101012317B1 - Electronic Hearing Aid for RF Channel Automatic Setting and Method thereof - Google Patents

Abstract

The present invention transmits an audio signal output for a hearing-impaired person, such as a public announcement in a public place, through a certain RF channel, and automatically searches for a corresponding channel by referring to data related to channel strength or information transmitted from a field strength or a transmitter at a receiver. The present invention relates to a hearing aid system and a method for enabling a hearing impaired person to easily listen to a broadcast on a channel best received through a receiver. In the hearing aid system for transmitting and receiving broadcasts in association with the premises broadcasting apparatus according to the present invention, the audio signal is the most among the plurality of transmitters and the plurality of transmitters for transmitting the audio signal from the premises broadcasting apparatus to different channels. At least one receiver which automatically searches for and tunes a channel of a corresponding well-received transmitter, and processes and outputs an audio signal of the tuned channel to a voice output means, wherein the plurality of transmitters are associated with respective channels or status information. Data is transmitted together with the audio signal, and the receiver selects and tunes a channel having the highest electric field strength calculated by calculating an electric field strength for a radio signal from each channel, or tunes each channel or state information. You can select and tune the channel with reference.

Hearing Impairment, Wireless Hearing Aids, On-premises Broadcasting Linkage, Automatic Channel Switching

Description

Electronic Hearing Aid for RF Channel Automatic Setting and Method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hearing aid system and method, and more particularly, to an audio signal output for a hearing-impaired person, such as a public announcement in a public place, through a certain radio frequency (RF) channel, and transmitted from an electric field strength or a transmitter at a receiver. And a hearing aid system and method for automatically hearing a corresponding channel with reference to data related to state information so that a hearing impaired person can easily listen to a broadcast on a channel best received through a receiver.

In general, conversation is very difficult for deaf people in noisy places. In addition, hearing aids must be used by the hearing impaired to communicate with the hearing impaired in such places. However, when using a hearing aid, it is intended to be used at a close distance. It's very hard to hear the other's story because of the nearby noise unless it is close. So, use a wireless hearing aid. The wireless hearing aid used may have a single RF channel, but it is convenient to have multiple RF channels for use. In the case of having multiple channels, the transmitter and the receiver to communicate with each other need to have the same RF channel for communication.

The conventional method is to manually adjust the channel of the transmitter and the receiver. However, let's assume that a public FM radio is installed for the hearing impaired transmitter for broadcasting. In this case, a hearing impaired person with a receiver must first know the broadcast channel of the transmitter and manually tune the channel of the receiver he is carrying. This is very difficult and inconvenient.

For example, suppose you install a wireless hearing aid transmitter for the hearing impaired at the Sindorim subway station. At this time, Sindorim Subway Station is a transit station, and in the history of Line 1 and Line 2, each different transmitter should transmit a broadcast using different channels. In this way, since the transmitter channels of each station are different from each other, if a person who has a receiver set to the transmitter installed in line 1 history enters the station 2 line, the channel must be tuned back to the channel 2 line in order to hear the broadcast. As such, it is very inconvenient for the hearing impaired to manually listen to the broadcast by setting the channel of the receiver.

As such, in the past, the user of the FM wireless hearing aid had to fix the RF channel of the receiver manually after checking the transmitter RF channel. Therefore, the receiver automatically detects the transmitter RF channel of the transmitter and receives the best. There is a need for a hearing aid system capable of automatically switching to a channel.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to allow a receiver to automatically search for an RF channel of an audio signal transmitted from a transmitter so that the hearing impaired person can conveniently listen to a broadcast on a channel that is best received. A system and method are provided.

In addition, another object of the present invention, by transmitting data associated with the channel and state information in the band separate from the audio signal band in the transmitter, it is possible to reduce the disturbance of voice communication when transmitting in the same band, the channel received by the receiver And a hearing aid system and method that can easily tune its reception channel according to state information and automatically switch to the best broadcast channel.

First, to summarize the features of the present invention, according to an aspect of the present invention for achieving the above object, the hearing aid system for transmitting and receiving broadcasts in conjunction with the premises broadcasting device, the audio signal from the premises broadcasting device is different from each other A plurality of transmitters transmitting on the channel; And at least one receiver for automatically searching for and tuning a channel of a corresponding transmitter from which the audio signal is best received among the plurality of transmitters, and processing and outputting an audio signal of the tuned channel to a voice output means. A plurality of transmitters transmit data related to each channel or state information together with the audio signal, and the receiver selects a channel having the highest field strength calculated by calculating a field strength for a radio signal from each channel. To tune, or select and tune a corresponding channel with reference to each channel or state information.

The plurality of transmitters transmit a broadcast or broadcast stop state through the respective channel or state information according to whether a channel of the transmitted audio signal or the level of the transmitted audio signal is above or below a threshold, and the receiver transmits the channel. Alternatively, the controller may determine whether the level of the audio signal received in the corresponding channel is greater than or less than the threshold value by referring to the state information, and displays the channel and the broadcasting or broadcasting stop state through the display unit.

Each of the plurality of transmitters modulates channel or state information in a data channel using fixed channel modulation means, modulates the audio signal in a selected audio channel of the plurality of audio channels using variable channel modulation means, The receiver may select a tuning channel by demodulating the channel or the state information using fixed channel demodulation means, and demodulate the audio signal in the tuning channel using variable channel demodulation means.

Each of the plurality of transmitters modulates channel and state information in any one of the plurality of data channels using variable data channel modulation means, and corresponds to the data channel using variable audio channel modulation means. The audio signal is modulated in an audio channel, and the receiver selects a tuning channel by demodulating the channel and state information based on the electric field strength of each data channel using slave channel demodulation means for processing a plurality of channels. Demodulating the audio signal in an audio channel corresponding to the tuning channel using a master channel demodulation means for processing a plurality of channels, wherein the slave channel demodulation means performs the plurality of demodulation means while the master channel demodulation means performs demodulation. Field strength for each data channel of transmitters Through the continuous channel search based on the figure, the master channel demodulation means assists channel change to demodulate in an audio channel exhibiting a higher electric field strength than the channel currently demodulated.

In addition, according to another aspect of the present invention, a hearing aid method for transmitting and receiving a broadcast in cooperation with a premises broadcasting apparatus, the plurality of transmitters transmitting audio signals from the premises broadcasting apparatus to different channels; At least one or more receivers, automatically searching for and tuning a channel of the transmitter from which the audio signal is best received among the plurality of transmitters; And processing the audio signal of the tuned channel in the at least one receiver and outputting the audio signal to the voice output means, wherein in the transmitting, the plurality of transmitters transmits data related to each channel or state information. In the step of transmitting with the audio signal, the tuning step, the receiver selects and tunes the channel with the highest electric field strength calculated by calculating the electric field strength for the radio signal from each channel, or each channel or The channel may be selected and tuned with reference to the status information.

According to the hearing aid system and method according to the present invention, the receiver automatically detects the RF channel of the audio signal transmitted from the transmitter and automatically adjusts the channel that is best received. You can listen to the broadcast conveniently without any operation.

In addition, according to the hearing aid system and method according to the present invention, the transmitter transmits data related to the channel and state information in a band separate from the audio signal band, so that the receiving channel according to the channel and state information received by the receiver It can be easily tuned to automatically switch to the best broadcast channel, and easily detects incoming channels while reducing voice communication disturbances due to analysis that separates voice and data signals from composite signals when transmitting over the same channel. can do.

In addition, according to the hearing aid system and method according to the present invention, it can be produced and distributed at low cost by using a short range communication protocol such as Bluetooth, RFID, ZigBee.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a hearing aid system 100 using multiple channel transmission and automatic channel switching reception according to an embodiment of the present invention. Referring to FIG. 1, the hearing aid system 100 according to an exemplary embodiment of the present invention includes an internal broadcasting device 110, an output device 120, and a mobile receiver 130.

The premises broadcasting device 110 is a device for providing announcements to users in public places such as subways, terminals, airports, parks, conference rooms, auditoriums, and periodically or for a predetermined time through an automatic broadcasting device. In addition, when there is an emergency or special notice at any time, the administrator can explain the contents through the microphone (microphone) to transmit the audio signal, which is an electrical signal output from the microphone, for the contents. Can be.

In this way, the audio signal transmitted from the premises broadcasting device 110 is output through the speaker of the output device 120 so that the hearing impaired person around can hear or output the radio signal through the RF transmitter of the output device 120. It may be possible for the hearing-impaired people around to hear through the receiver 130. In this case, when using an RF transmitter, a plurality of audio signals from the premises broadcasting apparatus 110 may be used in the respective channels, for example, CH (1), CH (2), and CH (3). ), ... can be transmitted in N channels such as CH (N). Such a communication between the transmitter and the receiver can be made by utilizing a short range communication protocol such as Bluetooth, RFID, ZigBee, and the like. Accordingly, such a transmission / reception module can be manufactured and distributed at low cost.

In the past, when the hearing-impaired people around had a wireless receiver, the RF transmitters were manually tuned to a channel transmitted by the RF transmitters, which made it difficult to set a channel in an environment where a channel is changed. Among them, the channel of the transmitter which receives the corresponding audio signal is best detected and tuned, and the audio signal of the tuned channel is processed to be output to a voice output means in the receiver 130, for example, an earpiece, and the like. By allowing people with disabilities to listen, the hearing-impaired people can listen to the broadcasts conveniently without any manipulation even in public places where the channel is changed.

In this case, the receiver 130 may select and tune a channel having the highest field strength calculated by calculating an electric field strength (RSSI) for a radio signal from a channel of each of the plurality of transmitters, or each of the plurality of transmitters In the case of transmitting data related to channel or status information of a with an audio signal, the receiver 130 may select and tune the corresponding channel with reference to each channel or status information from the plurality of transmitters. In this case, as described in the description of FIGS. 4 to 8, the transmitter may transmit data related to channel and state information in a band separate from the audio signal band. Accordingly, when the data is transmitted through the same channel, the load required for the analysis of separating the voice and data signals from the synthesized signal may improve the possibility of disturbing the voice communication, and the receiving channel may be easily searched.

2 is a diagram illustrating a transmitter 200 capable of multi-channel processing according to an embodiment of the present invention. Referring to FIG. 2, the transmitter 200 according to an embodiment of the present invention includes a control unit 210 including a central control unit 211 and a data interface 212, a display unit 213, an RF module 220, and a PA. (Power Amplifier) 221, Band Pass Filter (BPF) 222, Audio Switch 230, Microphone Amplifier 231, Audio Level Detector 232, and A / D Converter ( 233).

The central control unit 211 corresponds to a processor that is responsible for overall control of the transmitter 200 components as described above. When a UP / Down signal for channel setting is input, for example, the current state of the maximum 16 channels may be set. It is possible to select and set the channel one level higher than the channel or one level lower, and if the MIC / AUX signal for changing the mode is input, the audio switch 230 causes the signal from the external audio device (AUX) to be changed. Alternatively, the switching may be controlled to select and output a signal amplified by the microphone amplifier 231 through a signal input through the microphone MIC.

The analog audio signal output from the audio switch 230 is converted into a digital signal in the A / D converter 233, so that the RF module 220 receives the digital signal from the A / D converter 233 in the channel selected above. Modulated according to a predetermined modulation algorithm, the modulated signal is power amplified in the PA 221, the power amplified signal may be filtered in the BPF 222 and transmitted in the form of RF through the antenna.

The audio level detector 232 detects the level of the magnitude of the analog audio signal output from the audio switch 230, and accordingly, the central controller 211 determines whether the level of the magnitude of the corresponding audio signal is above or below the threshold. If the threshold value is greater than or equal to the threshold value, the display unit 213 may display that the broadcast is in progress. In addition, the display unit 213 may display the channel information selected above.

The data interface 212 may convert the above state information on the broadcasting or the broadcast stop state into data and output the data to the RF module 220. In this case, the RF module 220 from the A / D converter 233 as described above. In addition to the signal of, the above state information can also be modulated and transmitted. As also described with reference to FIG. 5, the data interface 212 may also data the channel of the currently transmitted audio signal, that is, selected channel information, and transmit the data along with the audio signal. It is desirable to transmit to a band different from the audio band.

3 is a view for explaining a receiver 300 capable of automatic channel switching according to an embodiment of the present invention. Referring to FIG. 3, the receiver 300 according to an embodiment of the present invention includes a control unit 310 including a central control unit 311 and a data interface 312, a display unit 213, a BPF 320, and an LNA ( Low Noise Amplifier (321), RF module 322, D / A converter 330, audio level detector 331, audio switch 332, microphone amplifier 333, and signal processor 334 It includes.

The central control unit 311 corresponds to a processor in charge of the overall control of the components of the receiver 300 as described above, and when an auto / manual signal for channel setting is input, for example, a plurality of transmitters among a maximum of 16 channels. Calculate the field strength (RSSI) for the radio signal from each channel and select the channel with the highest field strength to automatically tune, or manually go up one channel or one step below the current channel. The channel may be selected and set, and when a MIC / RF signal for changing a mode is input, the audio switch 332 is supplied via a signal from the D / A converter 330 or a microphone (MIC). The switching may be controlled to select the signal amplified by the microphone amplifier 333 and output the input signal to the signal processor 334. The signal processor 334 processes the audio signal output from the audio switch 332 to be output from the earphone with the best sound quality according to a user's hearing condition through noise filtering, feedback prevention, and audio fitting. At this time, the volume output to the earphone may be made through a volume button.

The RF signal received from the transmitters through the antenna is processed in the BPF 320 and delivered to the LNA 321, which amplifies the BPF 320 output to improve reception sensitivity, and improves the RF module 322. ) Demodulates the signal from the LNA 321 according to a predetermined demodulation algorithm and outputs the digital audio signal to the D / A converter 330. In addition, the RF module 322 calculates an electric field strength (RSSI) for a radio signal from a channel of each of the plurality of transmitters and informs the central controller 311, whereby the central controller 311 is calculated as described above. By transmitting information on the channel having the highest field strength to the data interface 312, the RF module 322 may automatically tune in the channel having the highest field strength according to the channel information.

The analog audio signal output from the RF module 322 is converted into an analog signal by the D / A converter 330. Accordingly, when the RF mode for mode change is selected and a corresponding control signal is generated, the D / A The output of the converter 330 may be transmitted to the signal processor 334 through the audio switch 332.

The audio level detector 331 detects the level of the magnitude of the analog audio signal output from the D / A converter 330, and accordingly, the central controller 311 determines whether the level of the magnitude of the corresponding audio signal is above or below the threshold. If it is determined that the threshold value is greater than or equal to the threshold value, the display unit 313 may indicate that the broadcast is in progress. In addition, the display unit 313 may display the channel information automatically tuned above.

The data interface 312 may convert the above state information on the broadcast or broadcast stop state into data and output the data to the RF module 322. Accordingly, the RF interface 322 searches only for the broadcast state, not the broadcast stop state. Can be demodulated in a given channel.

4 is a diagram for describing a hearing aid system using transmission through a fixed data channel and a variable audio channel and automatic channel switching reception according to another embodiment of the present invention. Referring to FIG. 4, a hearing aid system 400 according to another embodiment of the present invention includes an on-premises broadcasting device 410, an output device 420, a multi-channel transmitter 430, and a mobile receiver 440. . Here, the premises broadcasting device 410, the output device 420, and the mobile receiver 440 are similar to the premises broadcasting device 110, the output device 120, and the mobile receiver 130 described with reference to FIG. 1. However, the multi-channel transmitter 430 may be configured for each region, for example, each subway station in order to cover each corresponding region, and transmits channel and status information through a fixed data channel and through a variable audio channel. The audio signal is transmitted through the selected channel. Accordingly, the receiver 440 recognizes the channel and the state information received from the multi-channel transmitter 430 using the processing means of each band, and enables automatic tuning. The audio signal for the hearing impaired can be provided. 5 and 6 show an example of such a transmitter and a receiver.

5 is a diagram illustrating a transmitter according to another embodiment of the present invention using a fixed data channel and a variable audio channel. Referring to FIG. 5, a transmitter 500 according to another embodiment of the present invention includes a control unit 510 including a central control unit 211 and a data interface 212, a display unit 513, and a phase-locked loop (PLL). (520), WFM TX (Waveform Modulation Unit of Transmitter) (521), GFSK TX (Gaussian Frequency Shift Keying Unit of Transmitter: Transmitter GFSK modulator) (522), Synthesizer (523), PA 524, BPF 525, audio switch 530, microphone amplifier 531, and audio level detector 532. Here, the operation of the control unit 510, the display unit 513, the PA 524, the BPF 525, the audio switch 530, the microphone amplifier 531, and the audio level detector 532 may be performed by the control unit 210 of FIG. 2. ), The display unit 213, the PA 221, the BPF 222, the audio switch 230, the microphone amplifier 231, and the audio level detector 232.

However, the GFSK TX 522 provides data about channel and status information (channel information and broadcasting / broadcast stop status information) currently selected in a fixed channel, for example, a data channel of a band different from an audio channel such as CH0. Modulate according to the Shift Keying modulation algorithm. The above data may be set by the data interface 512 to cause the PLL 520 to generate a clock signal whose phase is synchronized at a corresponding frequency. Accordingly, the WFM TX 521 may generate a clock in which the PLL 520 is generated. By using the signal, a signal from the external audio device AUX output from the audio switch 530 or a signal input through the microphone MIC modulates the signal amplified by the amplifier 531. The WFM TX 521 corresponds to, for example, a variable channel modulating means capable of modulating in a selected audio channel among N channels CH (1) to CH (N). Accordingly, the synthesizer 523 synthesizes the modulated signals from the GFSK TX 522 and the WFM TX 521 and outputs the signals to the PA 524 so that the corresponding channel and state information and the audio signal can be transmitted through the antenna. To help.

6 is a view for explaining a receiver 600 according to another embodiment of the present invention capable of automatic channel switching. Referring to FIG. 6, a receiver 600 according to another embodiment of the present invention includes a control unit 610 including a central control unit 611 and a data interface 612, a display unit 613, a BPF 620, and an LNA ( 621), Division Unit (DIV) (622), Gaussian Frequency Shift Keying Unit of Receiver (GFSK RX) 623, Waveform Modulation Unit of Transmitter (WFM RX) Grandfather 624, a PLL 625, an audio level detector 630, an audio switch 631, a microphone amplifier 632, and a signal processor 633. Here, the control unit 610, the display unit 613, the BPF 620, the LNA 621, the audio level detector 630, the audio switch 631, the microphone amplifier 632, and the signal processor 633 are illustrated in FIG. Similarly to the control unit 310, the display unit 213, the BPF 320, the LNA 321, the audio level detector 331, the audio switch 332, the microphone amplifier 333, and the signal processor 334 of 3. It works.

However, the DIV 622 divides each channel frequency signal corresponding to the signal frequency channel modulated by the GFSK TX 522 and the WFM TX 521 in FIG. 5 from the signal processed by the LNA 321. Accordingly, the GFSK RX 623 demodulates the data channel, for example, the channel and the state information included in CH0, so that the data interface 612 can automatically select and set the tuning channel corresponding to the information. The PLL 625 may generate a clock signal whose phase is synchronized at a frequency corresponding to a channel set by the data interface 612. Accordingly, the WFM RX 624 may generate a clock signal generated by the PLL 625. The audio signal corresponding to the audio channel of the frequency band modulated by the WFM TX 521 of FIG. 5 is demodulated. Accordingly, the audio signal modulated by the WFM RX 624 or the output signal of the microphone amplifier 632 is selected by the audio switch 631 and transferred to the signal processor 633, so that a user such as a hearing impaired user can hear the earphone emd voice. The broadcast can be heard through the output means.

7 illustrates a transmitter 700 according to another embodiment of the present invention using a fixed data channel and a variable audio channel. Referring to FIG. 7, the transmitter 700 according to another embodiment of the present invention may include a control unit 710 including a central control unit 711 and a data interface 712, a display unit 713, a PLL 720, and a WFM. TX 721, WFM TX 722, synthesizer 723, PA 724, BPF 725, audio switch 730, microphone amplifier 731, and audio level detector 732. Here, operations of the controller 710, the display unit 713, the PA 722, the BPF 723, the audio switch 730, the microphone amplifier 731, and the audio level detector 732 are performed by the controller 210 of FIG. 2. ), The display unit 213, the PA 221, the BPF 222, the audio switch 230, the microphone amplifier 231, and the audio level detector 232.

However, if data on the channel and status information (channel information and broadcasting / broadcast stop status information) currently selected by the data interface 512 is set, the PLL 720 determines which audio channel (N1 to N2) of the corresponding frequency. In one), a phase-locked clock signal may be generated. Accordingly, the WFM TX 721 may output an external audio device (AUX) output from the audio switch 730 using the clock signal generated by the PLL 720. A signal from or a signal input through the microphone MIC modulates the signal amplified by the amplifier 531. The WFM TX 721 corresponds to, for example, a variable audio channel modulating means capable of modulating in the selected audio channel among the audio channels N1 to N2. The channel and state information for the currently selected channel is modulated in a separate data channel (any one of M1 to M2 channels) through the WFM TX 722, which is a variable data channel modulation means. The signals modulated by the WFM TX 721 as the variable audio channel modulation means and the WFM TX 722 as the variable data channel modulation means are synthesized by the synthesizer 723 and output to the PA 724. The state information and the audio signal may be filtered through the BPF 725 and then transmitted through the antenna. Here, any one of the audio channels N1 to N2 corresponds to any one of the data channels M1 to M2, respectively.

8 is a view for explaining a receiver 800 according to another embodiment of the present invention capable of automatic channel switching. Referring to FIG. 8, the receiver 800 according to another embodiment of the present invention includes a control unit 810 including a central control unit 811 and a data interface 812, a display unit 813, a BPF 820, and an LNA. 821, DIV 822, slave WFM RX 823, master WFM RX 824, PLL 825, audio level detector 830, audio switch 831, microphone amplifier 832, and signal processor (833). Here, the control unit 810, the display unit 813, the BPF 820, the LNA 821, the audio level detector 830, the audio switch 831, the microphone amplifier 832, and the signal processor 833, Similar to the control unit 310, the display unit 213, the BPF 320, the LNA 321, the audio level detector 331, the audio switch 332, the microphone amplifier 333, and the signal processor 334 of FIG. 3. It works.

However, the DIV 822 splits two channel frequency signals corresponding to the signal frequency channels modulated by each transmitter from the signal processed by the LNA 821 using the WFM TX 721 in FIG. 7. Accordingly, the slave WFM RX 823, which processes the multiple channels, demodulates the corresponding channel and state information of the data channel (any one of the M1 to M2 channels) first searched based on the electric field strength to demodulate the data interface 812. Automatically selects and sets the tuning channel corresponding to the information. The PLL 825 may generate a clock signal whose phase is synchronized at a corresponding frequency in accordance with an audio channel (any one of N1 to N2) set by the data interface 812, thereby processing a plurality of channels. The master WFM RX 824 demodulates the audio signal corresponding to the signal frequency channel modulated by the WFM TX 721 of FIG. 7 using the clock signal generated by the PLL 825. Accordingly, the audio signal modulated by the master WFM RX 824 or the output signal of the microphone amplifier 832 is selected by the audio switch 831 and transferred to the signal processing unit 833, whereby a user such as a hearing impaired user can use an earphone or the like. The broadcast can be heard through the voice output means.

In particular, in FIG. 8, while the master WFM RX 824 performs demodulation, the slave WFM RX 823 may perform field strengths for each data channel (1 to N channels) of the plurality of transmitters as shown in FIG. 1 or 4. Continuous channel search based on RSSI) allows the master WFM RX 824 to assist in channel changes to demodulate in a channel that exhibits a higher field strength than the currently demodulated audio channel. For example, the data channel first searched by the slave WFM RX 823 searches for channel n among the M1 to M2 channels, so that the master WFM RX 824 is an audio channel corresponding to channel n (any one of the channels N1 to N2). Even though demodulation is being performed in the same way, the slave WFM RX 823 demodulates the corresponding channel and state information when the data channel has a large field strength (RSSI) in another channel among the M1 to M2 channels due to the user's regional movement. To notify data interface 812, thereby changing the channel so that the master WFM RX 824 demodulates in the superior audio channel.

As described above, according to an embodiment of the present invention, in the hearing aid method of transmitting and receiving a broadcast in cooperation with a premises broadcasting device, when a plurality of transmitters transmit audio signals from the premises broadcasting device to different channels. At least one receiver automatically searches for and tunes a channel of a corresponding transmitter having the best audio signal among the plurality of transmitters, processes the audio signal of the tuned channel, and outputs the audio signal to an audio output means such as an earphone. . The plurality of transmitters may transmit data associated with each channel or state information with the audio signal in a separate band (or even the same band), and the receiver may have a field strength for a radio signal from each channel. By selecting and tuning the channel with the highest electric field strength calculated, or by selecting and tuning the channel with reference to each channel or status information, the channel can be easily listened to by the hearing impaired by automatic channel search. Make sure

As described above, optimal embodiments have been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a diagram illustrating a hearing aid system using multiple channel transmission and automatic channel switching reception according to an embodiment of the present invention.

2 is a view for explaining a transmitter capable of multi-channel processing according to an embodiment of the present invention.

3 is a view for explaining a receiver capable of automatic channel switching according to an embodiment of the present invention.

4 is a diagram illustrating a hearing aid system using transmission through a fixed data channel and a variable audio channel and automatic channel switching reception according to another embodiment of the present invention.

5 is a diagram illustrating a transmitter according to another embodiment of the present invention using a fixed data channel and a variable audio channel.

6 is a view for explaining a receiver according to another embodiment of the present invention capable of automatic channel switching.

7 is a diagram illustrating a transmitter according to another embodiment of the present invention using a fixed data channel and a variable audio channel.

8 is a view for explaining a receiver according to another embodiment of the present invention capable of automatic channel switching.

Claims (5)

In the hearing aid system for transmitting and receiving broadcasts in conjunction with the premises broadcasting device, A plurality of transmitters for transmitting audio signals from the premises broadcasting apparatus to respective different channels; And At least one receiver for automatically searching and tuning the channel of the transmitter of the plurality of transmitters the audio signal is best received, and processing the audio signal of the tuned channel to output to the voice output means, The plurality of transmitters transmits data associated with respective channel or state information for the transmitted audio signals together with the audio signal, The receiver selects and tunes a channel having the highest electric field strength calculated by calculating electric field strength for the radio signal from each channel, or selects and tunes a corresponding channel with reference to each channel or state information. Hearing aid system characterized by. The method of claim 1, The plurality of transmitters transmit a broadcast or broadcast stop state through the respective channel or state information according to whether the channel of the transmitted audio signal or the level of the size of the transmitted audio signal is above or below a threshold value. The receiver determines whether a level of an audio signal received from a corresponding channel is greater than or less than a threshold with reference to the channel or state information, and displays a channel and a broadcasting or broadcasting stop state through a display unit. . The method of claim 1, Each of the plurality of transmitters modulates channel and state information in a data channel using fixed channel modulation means, modulates the audio signal in a selected audio channel of the plurality of audio channels using variable channel modulation means, And the receiver demodulates the channel and state information using fixed channel demodulation means to select a tuning channel and demodulates the audio signal in the tuning channel using variable channel demodulation means. The method of claim 1, Each of the plurality of transmitters modulates channel and state information in any one of the plurality of data channels using variable data channel modulation means, and corresponds to the data channel using variable audio channel modulation means. Modulate the audio signal in an audio channel, The receiver demodulates the channel and state information based on the electric field strength of each data channel using slave channel demodulation means for processing a plurality of channels, selects a tuning channel, and processes the master channel demodulation means for processing the plurality of channels. Demodulate the audio signal in an audio channel corresponding to the tuning channel by using Here, while the master channel demodulation means performs the demodulation, the slave channel demodulation means performs a continuous channel search based on the electric field strength of each of the data channels of the plurality of transmitters, and thus the master channel demodulation means than the channel currently demodulated. Hearing aid system, characterized in that it assists channel change to demodulate in an audio channel exhibiting higher field strength. In the hearing aid method for transmitting and receiving broadcasts in conjunction with the premises broadcasting device, Transmitting audio signals from the premises broadcasting device to respective different channels by the plurality of transmitters; At least one or more receivers, automatically searching for and tuning a channel of the transmitter from which the audio signal is best received among the plurality of transmitters; And Processing the audio signal of the tuned channel by the at least one receiver and outputting the audio signal to a voice output means; In the transmitting step, the plurality of transmitters transmits data associated with each channel or state information with the audio signal, In the tuning step, the receiver selects and tunes a channel having the highest electric field strength calculated by calculating electric field strength for the radio signal from each channel, or refers to the corresponding channel with reference to each channel or state information. Hearing aid method characterized in that for selecting and tuning.

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