KR200391084Y1 - Apparatus for setting channel of stereo wireless headphone - Google Patents

Abstract

The present invention relates to a channel setting apparatus of stereo wireless headphones that can select and listen to a plurality of sound sources, and prevents sound quality degradation due to interference of surrounding sound source frequencies.

The channel setting apparatus of the disclosed stereo wireless headphone includes: a first channel selection key for selecting a desired sound source from a plurality of sound sources by up / down a channel; A transmission control unit for controlling a local oscillation frequency applied to the modulation unit by controlling the first local oscillation unit according to the data selected from the first channel selection key; And a second channel selection key for selecting a desired sound source from among a plurality of received sound sources having a transmitter corresponding to a channel of the first channel selection key and a transmitter including a first display unit for displaying an operation state under the control of the transmission control unit. ; A reception control unit controlling a second local oscillation unit to change a local oscillation frequency applied to the mixing unit according to the key data selected from the second channel selection key; And a receiver including a second display unit displaying an operation state under the control of the reception control unit.

This allows you to easily select the sound source you want to listen to while multiple sources are connected by simply up or down the channel, and even if the same product exists around you, you can independently transmit and receive each other so that users can enjoy high quality audio. There is an advantage that a signal is provided.

Description

Channel setting device of stereo wireless headphones {APPARATUS FOR SETTING CHANNEL OF STEREO WIRELESS HEADPHONE}

The present invention, for example, relates to a stereo wireless headphones that can receive and listen to the sound source, such as a television, compact disc player, MP-3, digital video disc player in a long distance, more specifically, on the song, receiver side, respectively CHANNEL UP / DOWN KEY is provided to select and listen to the sound source to be listened from among several sound sources, and to prevent the sound quality deterioration due to interference of surrounding sound source frequencies. For example, the present invention relates to a channel setting apparatus for stereo wireless headphones effectively used in a gym, subway, or bus.

In addition, the present invention relates to a channel setting apparatus of stereo wireless headphones that can ensure the independence and security of the same sound source (product) by matching the transmitter and the receiver so that there is no interference in the sound source frequency of the same product around will be.

Generally, when you want to listen to audio signals of a sound source such as a television, a compact disc player, an MP-3, a digital video disc player, an audio cassette player, or the like, listen to the speakers provided in the main unit, or connect wired headphones or wireless headphones to the main unit. Connect and listen. Especially when listening to the speaker on the main body in public places, such as subways or buses, it causes noise pollution to many unspecified people around, so in public places, wired headphones or wireless headphones should be used to limit the user's own use. Will be used.

However, in the case of the wired headphones, the headphones and the sound source are connected by a wire, which is not only inconvenient to be constrained in the range of activity, but especially when you want to exercise while listening to the sound source you want in the gym. There is a problem that is severely restricted.

In the case of a wireless headphone, the headphone and the sound source are connected by a high frequency line, and a frequency signal is modulated and transmitted by the transmitter side connected to the main body of the sound source by a jack, and the frequency side modulated signal is provided on the receiver side of the headphone. Because it is designed to listen to the audio signal by demodulating, it has the advantage that it is not restricted by the range of activity unlike the wired headphones, while the channel is fixed to the wireless headphones, so that several sound sources such as a TV and a compact disc player If you want to listen to the sound source you want from among the sound sources such as MP-3, digital video disk player, audio cassette player, etc. .

In addition, audio signals of neighboring same sound sources (products) are confused with each other, for example, when the same sound source is listened to by different people with the same sound source as the next person in the subway, so that the frequency bands of each other are the same. And their audio signals are confused with each other and cause noise.

Accordingly, an object of the present invention is to provide a channel setting apparatus for stereo wireless headphones that can easily select and listen to a sound source among a plurality of sound sources without attaching or detaching a jack on the transmitter side. A channel up / down key is provided in a transmitter and a receiver provided in a headphone connected to each other, so that a desired sound source is selected and listened to as a channel up / down key.

Another object of the present invention is to provide a channel setting device of stereo wireless headphones to prevent frequency interference with the same product in the surroundings, and the channel setting device is adapted to prevent the interference of the frequencies of the same sound source in the surroundings. This is achieved by coding the receiver and matching it to 1: 1.

Further objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

According to the channel setting apparatus of the stereo wireless headphone according to the present invention for achieving the above object, by modulating the audio signal input from a plurality of sound sources to the oscillation frequency of the first local oscillator in the modulator of the transmitter to a high frequency through the antenna A wireless headphone, which transmits a signal and mixes the high frequency signal with an oscillation frequency of a second local oscillation unit by a mixing unit of a receiver provided in a headphone, detects the signal by a detector, and outputs it to a speaker;

The transmitter,

A first channel selection key for selecting a desired sound source from the plurality of sound sources by up / down a channel; A transmission control unit for controlling the first local oscillation unit to change the local oscillation frequency applied to the modulation unit for each channel according to the key data selected from the first channel selection key; And a first display unit which displays whether the transmitter is operated by the control of the transmission control unit.

The receiver,

A second channel selection key having a channel corresponding to the channel of the first channel selection key and selecting a desired sound source from the plurality of received sound sources; A reception control unit controlling the second local oscillation unit to change the local oscillation frequency applied to the mixing unit for each channel according to the key data selected from the second channel selection key; And a second display unit which displays whether the receiver is operated by the reception control unit.

In addition, according to the channel setting apparatus of the stereo wireless headphone according to the present invention, the audio signal input from the sound source is modulated by the oscillation frequency of the first local oscillator in the modulator of the transmitter to transmit as a high frequency signal through the antenna and provided in the headphones A wireless headphone for mixing the high frequency signal with the oscillation frequency of the second local oscillator in the mixing section of the receiver, and detects and amplifies in the detector to output to the speaker;

The transmitter,

A transmission controller configured to set the oscillation frequency applied to the modulator by controlling the first local oscillator with a predetermined code; And a first display unit which displays whether the transmitter is operated by the control of the transmission control unit.

The receiver,

A reception control unit having a predetermined code corresponding to the transmission control unit and setting an oscillation frequency of the second local oscillation unit to be 1: 1 with the transmission control unit; And a second display unit which displays whether the receiver is operated by the reception control unit.

In this way, a channel selection key is provided in each of the transmitters and the receivers connected to the sound sources, so that the user can directly select the sound source to be listened to, and up or down the channel selection keys of the receiver. It can be seen that since the receiver and the receiver are matched to 1: 1, frequency interference with the same product around is not caused.

As a result, you can easily select and listen to the sound source you want to listen to among multiple sources without having to remove the transmitter from the sound sources, and provide high-quality audio signals to users without frequency interference with the same products around you. There is an advantage to doing this.

And, there may be a plurality of embodiments of the present invention, the following will be described in detail for the most preferred embodiment.

Through this preferred embodiment, the object of the present invention, other objects, features and advantages will become more apparent from the following description with an embodiment according to the present invention in connection with the accompanying drawings shown for illustrative purposes.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the channel setting apparatus of the stereo wireless headphone according to the present invention.

1 is a block diagram showing a transmitter of a stereo wireless headphone according to the present invention, Figure 2 is a block diagram showing a receiver of a stereo wireless headphone according to the present invention.

As shown in FIGS. 1 and 2, the channel setting apparatus of the stereo wireless headphone according to the present embodiment is wired to a plurality of sound sources 30 such as a television, a compact disc player, an MP-3, a digital video disc player, and the like. A transmitter 10 for modulating and transmitting audio signals provided from the sound sources to a high frequency signal, and a receiver provided in a headphone for receiving a high frequency signal transmitted from the transmitter and restoring the received high frequency signal to an original audio signal It consists of 20.

As shown in FIG. 1, the transmitter 10 includes a first channel selection key 12 for changing a channel up / down so that a user can select a sound source to be listened to among a plurality of sound sources 30, and The key selected by the channel selection key 12 controls the transmission control unit 11 for controlling the overall operation of the transmitter according to the data, and the audio signals R and L of the left and right channels input from the sound sources 30. It is caused by the channel selection of the low frequency amplifier 13 and the first channel selection key 12 which amplify to a predetermined level by the control of the transmission control unit 11 and mute the output of the audio signal. The first local oscillator 14 for changing the local oscillation frequency for each channel according to the control signal of the transmission control unit 11 and outputting the audio signal amplified and input by the low frequency amplifier 13 for each channel is inputted. To the local oscillation frequency of the first local oscillator 14 The modulator 15 for modulating and outputting the power, the high frequency transmission amplifier 16 for power amplifying the high frequency signal modulated by the modulator 15, and transmitting the modulated signal through the antenna ANT1, and the transmission controller 11 It consists of a display part 17 which displays the operation | movement of the said transmitter by control.

In the receiver 20, as shown in FIG. 2, the high frequency reception for receiving the high frequency signal transmitted from the transmitter 10 to the antenna ANT2, amplifying the weak high frequency signal to a sufficient magnitude, and outputting the same. A channel corresponding to the channel of the first channel selection key 12 of the transmitter 10 and the transmitter 10 and having a channel up or down to select a desired sound source among the plurality of received sound sources 30 Channel selection of the second channel selection key 22, the reception control unit 21 for controlling the overall operation of the receiver according to the data selected from the second channel selection key 22 and the second channel selection key 22 The second local oscillator 25 for changing the local oscillation frequency for each channel according to the control signal of the reception control unit 21 according to the channel, and the high frequency signal amplified by the high frequency reception amplifier 23 and the second local oscillator 25. By mixing the local oscillation frequency of The mixing unit 24 for extracting the frequency, the filter unit 26 for filtering out the intermediate frequency extracted from the mixing unit 24, and the weak intermediate frequency filtered by the filter unit 26 are sufficiently large. And extract the left and right channel audio signals (low frequency signals) from the amplified input intermediate frequency and output the left and right channel speakers through the audio amplification unit 29. And a detector 28 for outputting to (29a) and (29b).

The channel setting apparatus of the stereo wireless headphone according to the present invention made as described above will be described in detail below.

First, a power source of a headphone (not shown in the drawing), which is not shown in the drawing, in a state where a plurality of sound sources 30 such as a television, a compact disc player, an MP-3, a digital video disc player, an audio cassette player, and the like are connected to the transmitter 10 in a wired manner. After turning on the switch, the first channel selection key 12 of the transmitter 10 is turned up or down to select a sound source to be listened from among the plurality of sound sources 30. For example, when the sound source of the TV is CH1, the compact disc player is CH2, the MP-3 is CH3, and the digital video disc player is CH4, the user selects the MP-3 from among the connected multiple sources. When the user wants to listen to the music, the sound source of the MP-3 is selected by turning the first channel selection key 12 up / down to set the channel of CH3. Here, up to about 60 channels can be selected by the first channel selection key 12.

Subsequently, when the desired channel is selected through the first channel selection key 12 as described above, the transmission control unit 12 controls the display unit 17 such as a light emitting diode to inform the user of the operation of the transmitter 10. In addition to the lighting, the low frequency amplifier 13 and the first local oscillator 14 are controlled to correspond to the selected channel.

The low frequency amplifier 13 amplifies the audio signals R and L of the left and right channels input from the sound sources of MP3 among the plurality of sound sources 30 by a control of the transmission control unit 11 to a sufficient magnitude. The local oscillation frequency is inputted to the modulator 15, and the first local oscillator 14 changes the local oscillation frequency for each channel by the control signal of the transmission control unit 11 due to the channel selection of the first channel selection key 12, That is, a local oscillation frequency corresponding to the channel CH3 selected by the first channel selection key 12 is generated and provided to the modulator 15.

The modulator 15 modulates the audio signals of the left and right channels amplified by the low frequency amplifier 13 to the local oscillation frequency input from the first local oscillator 14. In this case, the modulation method is an FM modulation method. Subsequently, the high frequency transmission amplifier 16 amplifies the high frequency signal modulated by the modulator 15 and then transmits the high frequency signal through the antenna ANT1. Such a transmission operation is performed by supplying power to the entire transmitter from a power supply unit not shown in the drawing as the power switch is turned on.

Meanwhile, the receiver 20 shown in FIG. 2 receives the high frequency signal transmitted from the transmitter 10 through the antenna ANT2, and the received weak high frequency signal is sufficiently large in the high frequency reception amplifier 23. Amplified and input to the mixing section 24. At this time, when the user wants to listen to the audio signal of the sound source selected by the transmitter 10, the second channel selection key 22 should be adjusted to the same channel as the channel CH3 selected by the transmitter 10. If the user selects a desired channel by up / down the second channel selection key 22, the reception controller 21 outputs a local oscillation frequency corresponding to the channel selected by the second channel selection key 22. The second local oscillator 25 is controlled. The second local oscillator 25 changes the local oscillation frequency for each channel by the control signal of the reception controller 21 due to the channel selection of the second channel select key 22, that is, in the second channel select key 22. A local oscillation frequency corresponding to the selected channel CH3 is generated and provided to the mixing unit 24.

The mixing unit 24 mixes the high frequency signal input from the high frequency reception amplifier 23 and the local oscillation frequency generated by the second local oscillator 25 to extract the intermediate frequency signal of 10.7 MHz, which is the difference, and extracts the intermediate frequency signal. The frequency signal is filtered through the filter section 26 and amplified to a sufficient magnitude in the intermediate frequency amplifier section 27 and then provided to the detector section 28.

The detector 28 extracts the left and right channel audio signals (low frequency signals) from the amplified intermediate frequency signal, and the extracted left and right channel audio signals are sufficiently sized through the audio amplifier 29. It is amplified and output to the speakers 29a and 29b of the left and right channels. Such a reception operation is performed by supplying power to the entire receiver 20 in a storage battery not shown in the drawing as the power switch is turned on, and an operation state of the receiver 20 is shown in a display unit (such as a light emitting diode). Shown).

As such, by selecting the channel through the first and second channel selection keys 12 and 22 of the transmitter 10 and the receiver 20, the audio signals with other sound sources in the surroundings are not confused and the audio is clear. A signal can be listened to, and a sound source to be listened to can be easily selected from among a plurality of sound sources.

Meanwhile, as another embodiment of the present invention, the transmitter 10 and the receiver 20 do not generate frequency interference with the same product (sound source) nearby without the first and second channel selection keys 12 and 22 described above. ) Can be coded to match 1: 1. That is, unlike the above-described embodiment, the transmitter 10 and the receiver 20 have a fixed channel, and by setting a predetermined code in each of the transmission control unit 11 and the reception control unit 21, the transmission control unit 11 and the reception control unit 21 are matched to 1: 1, respectively. Here, up to 2 ¹⁶ codes can be set.

In this way, in a state where the transmitter 10 and the receiver 20 are matched with 1: 1, the transmission controller 11 controls the first local oscillator 14 with the set code value, and the first local oscillator ( In 14), the local oscillation frequency corresponding to the set code value is output and provided to the modulator 15 so that the modulator 15 receives the audio signal input from the low frequency amplifier 13 as described above. The modulation is performed on the local oscillation frequency and transmitted through the high frequency transmission amplifier 16 and the antenna ANT1.

In addition, the reception controller 21 of the receiver 20 controls the second local oscillator 25 with a code value corresponding to the transmission control unit 11, whereby the first local oscillator 25 receives the first local oscillator 25 from the second local oscillator 25. A local oscillation frequency corresponding to (14) is output and provided to the mixing section 24, and the mixing section 24 receives the high frequency signal and the second local oscillating section received through the antenna ANT2 and the high frequency reception amplifier 23. The local oscillation frequency inputted from (24) is mixed to pass the audio signal through the filter unit 26, the intermediate frequency amplifier 27, the detector 28 and the audio amplifier 29 to the left and right channels. Output to speakers 29a and 29b. In this way, by encoding the transmitter 10 and the receiver 20, even if there is the same sound source (product) in the vicinity, each of them independently and only receive their own frequency to output a speaker to listen to a cleaner audio signal It becomes the number.

On the other hand, as a comparative example, when the conventional technology, that is, to select and listen to a plurality of sound sources, there is an inconvenience of having to use a jack of a transmitter in the main body of each sound source, as well as audio signals of the same sound sources around Contrary to the problem that is caused by noise and crosstalk with each other, the present invention is provided with a channel selection key in the transmitter and the receiver, respectively, the user directly transmits the sound source to be heard among a plurality of sound sources, the channel selection key of the receiver It can be seen that the operation can be selected, and the independence is ensured by matching the transmitter and the receiver so that there is no frequency interference with the same sound sources nearby.

In this result, according to the present invention, there is provided the convenience of use that the user can simply select the sound source to be listened to from among a plurality of sound sources, without having to remove the transmitter from the sound sources. Even if each other independently transmits and receives, there is an advantage in that a high quality audio signal is provided to the user.

In addition, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments shall fall within the appended utility model registration claims of the present invention.

According to the channel setting apparatus of the stereo wireless headphone of the present invention, which is clear from the above description, it is possible not only to select and listen to the sound source to be listened from among a plurality of sound sources through the channel selection key, but also when the same product exists around each other. By independently transmitting and receiving only its own frequency, frequency interference does not occur, thereby providing a high quality audio signal to a headphone user.

1 and 2 is a configuration diagram showing an embodiment provided in the description of the channel setting apparatus of the stereo wireless headphones according to the present invention,

1 is a block diagram showing a transmitter of the stereo wireless headphones,

2 is a block diagram illustrating a receiver of the stereo wireless headphones.

<Description of the symbols for the main parts of the drawings>

10 transmitter 11 transmission control unit

12: first channel selection key 13: low frequency amplifier

14: first local oscillator 15: modulator

20: receiver 21: reception control unit

22: second channel selection key 24: mixing section

25: second local oscillator 27: intermediate frequency amplifier

28: detector 30: sound source

Claims (2)

An audio signal input from a plurality of sound sources is modulated by the transmitter's modulator to the local oscillation frequency of the first local oscillator and transmitted as a high frequency signal through an antenna, and the second local oscillator transmits the high frequency signal by a mixing unit of a receiver provided in a headphone. A wireless headphone, which is mixed with a local oscillation frequency of and detected and amplified by a detector and output to a speaker; The transmitter, (1) a first channel selection key for selecting a desired sound source from the plurality of sound sources by up / down a channel; (2) a transmission control unit for controlling the first local oscillation unit to change the local oscillation frequency applied to the modulation unit for each channel according to the key data selected from the first channel selection key; (3) a first display unit for displaying the presence or absence of operation of the transmitter under control of the transmission control unit, The receiver, (1) a second channel selection key having a channel corresponding to the channel of the first channel selection key and selecting a desired sound source from the plurality of received sound sources; (2) a reception control unit controlling the second local oscillator according to the key data selected from the second channel selection key to change the local oscillation frequency applied to the mixing unit for each channel; And (3) A channel setting apparatus for stereo wireless headphones, characterized in that it comprises a second display section for displaying the presence or absence of operation of the receiver under control of the reception control section. The method according to claim 1, The channel setting apparatus of the stereo wireless headphone, characterized in that the number of channels that can be selected by the first and second channel selection key is 60.