KR100638108B1 - Audio system and wireless headphone - Google Patents

Abstract

The present invention discloses an audio system having a wireless headphone and a wireless headphone applied thereto to improve sound quality by wirelessly transmitting a sound source in an analog or digital form to a wireless headphone, and outputting the transmitted sound source from the wireless headphone to a speaker.

The audio system of the present invention comprises a system for converting at least one analog sound source and at least one digital sound source into a specific format state, and selecting any one of them for wireless transmission; And a wireless headphone configured to receive and demodulate the wirelessly transmitted signal, convert the format state into an analog signal, and output the audio signal as an audible frequency sound.

Accordingly, according to the present invention, the sound quality of the audio system is wirelessly transmitted by wirelessly transmitting an analog or digital sound source containing little noise and sound distortion to the wireless headphones, and restoring the transmitted sound source from the wireless headphones to the speaker. In this way, the sound is output from the wireless headphones accordingly.

Wireless headphones. Audio system. Analog signal processing means. Digital signal processing means.

Description

Audio system and wireless headphones applicable thereto {Audio system and wireless headphone}

1 is a block diagram illustrating a preferred embodiment of an audio system according to the present invention.

2 is a block diagram illustrating another embodiment of an audio system according to the present invention.

3 is a block diagram illustrating another embodiment of an audio system according to the present invention.

The present invention relates to an audio system and a wireless headphone applied thereto, and more particularly, to wirelessly transmit an analog or digital sound source to a wireless headphone, and to restore the transmitted sound source from the wireless headphone to output the speaker to the speaker. An audio system having a wireless headphone and a wireless headphone applied thereto.

Audio systems have been developed and commercialized in various ways to reproduce analog and digital sound sources, and recently, wireless systems adopting wireless headphones have become popular.

Sound sources used in audio systems can be broadly classified into analog formats provided by tuner, microphone, or reel tape playback, and digital formats provided by CD, DVD, and MP3.

In the case of an audio system employing wireless headphones, a sound source of the above format is wirelessly transmitted from the audio system, and the wirelessly transmitted signal is reproduced from the wireless headphones.

The audio system to which wireless headphones can be applied can be classified into a case in which a speaker system is configured using an amplifier for a general speaker and a case in which an amplifier for a headphone is used.

When using an amplifier for a normal speaker, the sound is transmitted wirelessly via a preamplifier, a speaker amplifier, an attenuator for headphones, an analog modulator, and a transmitter. The wireless headphone includes a receiver, an analog demodulator, an amplifier for a headphone, and a speaker unit to receive, amplify, and output the signal transmitted in the audible frequency band.

However, in the case of using a general speaker amplifier as described above, the signal transmitted wirelessly is a signal output from the speaker amplifier to drive the final speaker. However, the signal output to drive the final speaker contains a lot of noise and sound distortion in terms of very weak signal. Therefore, since the signal containing the noise and distortion as described above is transmitted to the wireless headphones as a sound source, and the wireless headphones reproduce a sound source in a bad state, the wireless headphone user has a problem that it is difficult to obtain satisfactory sound quality.

In addition, when a headphone amplifier is used, sound is wirelessly transmitted through a preamplifier, a headphone amplifier, an analog modulator, and a transmitter. The wireless headphone includes a receiver, an analog demodulator, an amplifier for a headphone, and a speaker unit to receive, amplify, and output the signal transmitted in the audible frequency band.

However, even when the headphone amplifier is used as described above, the signal to be transmitted wirelessly is a final output, that is, a signal that has undergone a modification of the signal. In this case, the signal may be improved as compared with the case of using an amplifier for a general speaker.

However, the signal output from the headphone amplifier is also the final signal and contains a lot of noise and sound distortion in terms of a very weak signal. Therefore, the conventional technology using the headphone amplifier has a problem that it is difficult for the wireless headphone user to obtain satisfactory sound quality because the sound source in a bad state is used.

The present invention has been made to solve the above problems, an object of the present invention is to wirelessly transmit an analog or digital sound source that does not include noise and sound distortion to the wireless headphone, the transmitted sound source in the wireless headphone The present invention provides an audio system that can be restored to improve sound quality.

Another object of the present invention is to provide a wireless headphone that improves the sound quality reproduced by wirelessly receiving an analog or digital sound source that does not include noise and sound distortion.

In order to solve the above technical problem, an audio system according to the present invention includes a system for converting at least one or more analog sound sources and at least one digital sound source into a specific format state, and selecting any one of them for wireless transmission; And a wireless headphone configured to receive and demodulate the wirelessly transmitted signal, convert the format state into an analog signal, and output the audio signal as an audible frequency sound.

Here, the system comprises: analog signal processing means for converting an analog sound source into digital and encoding it into a specific format for transmission; Digital signal processing means for converting a digital sound source into the specific format; Selecting means for sensing an input of the analog sound source and the digital sound source and selecting one of an output of the analog signal processing means and an output of the digital signal processing means; And transmitting means for modulating the signal output from the selecting means and transmitting it wirelessly.

The analog signal processing means may include: an amplifier for amplifying a signal provided from any one of a line input terminal and an analog sound source; An analog / digital converter for converting the signal amplified by the amplifier into a digital signal; And an encoder for encoding the digitally converted signal into the specific format.

The digital signal processing means may include: a selector for selecting a format of a digital signal input by a user and outputting a selection signal corresponding thereto; A controller for outputting a control signal corresponding to the selection signal output from the selector; And a format converter for converting a format of the digital signal input into the specific format by receiving the control signal corresponding to the selection signal.

The selection means may include: a detector configured to sense an input of the analog sound source and the digital sound source and output a detection signal corresponding thereto; A controller for outputting a control signal corresponding to the detection signal; In response to the control signal provided from the control unit may be provided with a switch for selecting the signal output from any one of the analog signal processing means and the digital signal processing means to transmit to the transmission means.

In addition, the wireless headphones, the receiver for receiving a radio transmitted signal; A demodulator for demodulating a signal received at the receiver; A decoder for decoding the demodulated digital signal; A digital to analog converter for converting the decoded signal into an analog signal; A filter for filtering the converted analog signal; A headphone amplifier for amplifying the filtered signal according to an output characteristic; And a speaker configured to output a signal amplified by the headphone amplifier as a sound.

Hereinafter, a preferred embodiment of an audio system and a wireless headphone applied thereto according to the present invention will be described with reference to the accompanying drawings.

The present invention is an embodiment of a system for wirelessly selecting and transmitting the analog sound input to the LINE IN terminal and the digital sound input to the Digital IN terminal as shown in FIG. 1, the line input as shown in FIG. 2. An embodiment of a system for wirelessly transmitting analog sound input to a terminal and an embodiment of a system for wirelessly transmitting digital sound input to a digital input terminal will be described.

The present invention may be configured by connecting an analog sound source to a line input terminal, or may be configured by connecting a digital sound source to a digital input terminal. In addition, it is apparent that the embodiments presented by the present invention may be variously modified according to the manufacturer's intention without being limited thereto.

Referring to FIG. 1, an embodiment according to the present invention will be described. The embodiment is divided into a configuration for a system area and a configuration for a wireless headphone area.

The system includes components necessary for wireless transmission of sound, that is, an amplifier 10, an analog / digital converter 12, an encoder 14, a format converter 16, a detector 18, a selector 20, and a controller. (22), switch (24), modulator (26), and transmitter (28).

In addition, the wireless headphones include components necessary for converting a wirelessly transmitted signal into an audio frequency signal, that is, a receiver 40, a demodulator 42, a decoder 43, a digital-to-analog converter 44, a filter 46, Headphone amplifier 48 and speaker 50 are included.

In the system described above, analog sound is input to the amplifier 10 through the line input terminal, the amplifier 10 amplifies and compensates the original sound analog signal, and the analog-to-digital converter 12 is output from the amplifier 10. The original sound analog signal is converted into digital, and the encoder 14 encodes the input digital signal into a digital signal "A" and transfers it to the switch 24. In this case, the encoder 14 converts a digital sound source, and converts an input signal into a digital format having the same format as that converted by the format converter 16 to be described later.

On the other hand, digital sound is input to the format converter 16 through the digital input terminal, and the format converter 16 converts the digital format input by the control signal provided from the control unit 22 into a specific format. Here, the digital sound may be provided in various formats such as PCM or MP3 format. Therefore, digital sound must be converted to a common format that can be received by wireless headphones and transmitted over the air. In this case, the user selects the format of the input digital sound using the selector 20, the selector 20 provides a signal corresponding to the format selected by the user to the controller 22, and the controller 22 inputs the input signal. The control signal corresponding to the signal is provided to the format converter 16. Therefore, the format converter 16 converts the digital sound having the format selected by the user into the common format, and transmits the converted digital signal "D" to the switch 24.

On the other hand, the detector 18 is connected to the line input terminal and the digital input terminal to detect which terminal the signal is input. The detector 18 determines a terminal to which a signal is input and provides a corresponding detection signal to the controller 22, and the controller 22 performs a switching operation of the switch 24 as a detection signal provided from the detector 18. To control.

The switch 24 selects one of the signal " A " input from the encoder 14 or the signal " D " input from the format converter 16 to the modulator 26 by controlling the control of the controller 22. The modulator 26 modulates the signal transmitted from the switch 24 into a message signal for wireless transmission, and the transmitter 28 carries the signal transmitted from the modulator 26 on the carrier to transmit the radio.

As described above, the signal transmitted wirelessly from the transmitter 28 of the system is received by the receiver 40 of the wireless headphone, and the receiver 40 separates the message signal carried on the carrier wave and transmits the message signal to the demodulator 42. 42) demodulates the message signal to generate a digital signal, and the decoder 43 decodes the demodulated digital signal so that it can be driven by the digital-to-analog converter 44 because the demodulated digital signal is encoded in a specific format on the system side. The analog converter 44 converts the digital signal decoded by the decoder 43 into an analog signal. In addition, the signal output from the digital-to-analog converter 44 is transmitted to the filter 46 so that the noise and band of the signal are filtered and then passed to the headphone amplifier 48. The headphone amplifier 48 amplifies the filtered signal to a level suitable for the output characteristics of the headphone and provides it to the speaker 50 of the headphone. As a result, an audible frequency signal, that is, sound, is output from the speaker 50 of the wireless headphone.

As described above, since the embodiment is configured, the system transmits a sound source that contains little noise and sound distortion in terms of a weak signal since the system does not go through a signal processing process accompanied with signal deterioration, and thus the sound in the wireless headphones Compared to the prior art can be output with a satisfactory sound quality.

The above-described embodiment of FIG. 1 is implemented for a system for outputting sound by selecting an analog input terminal and a digital input terminal. Embodiments of the present invention may be limited to analog inputs as shown in FIG. 2 or limited to digital inputs as shown in FIG.

When limited to the analog input, the embodiment has a configuration for the system area and a configuration for the wireless headphone area as shown in FIG. 2, wherein the system includes components necessary for wireless transmission of sound, that is, the amplifier 60, analog / Digital converter 62, encoder 64, modulator 66, and transmitter 68 are included. In the same manner as in the embodiment of FIG. 1, the wireless headphones have the components necessary for converting a wirelessly transmitted signal into an audible frequency signal, that is, a receiver 40, a demodulator 42, a decoder 43, a digital-to-analog converter ( 44, filter 46, headphone amplifier 48, and speaker 50.

In the embodiment of FIG. 2, since the configuration and operation of the wireless headphone are the same as those of the first embodiment, redundant description thereof will be omitted, and components included in the system area may also operate in the same manner as the components corresponding to the first embodiment. Perform.

That is, analog sound is input to the amplifier 60 through the line input terminal, the amplifier 60 amplifies and compensates the original sound analog signal, and the analog-to-digital converter 62 outputs the original sound analog signal output from the amplifier 60. To digital, the encoder 64 transmits the input digital signal to the modulator 66, the modulator 66 modulates the transmitted signal into a message signal for wireless transmission, and the transmitter 68 is a modulator ( The signal transmitted from 66) is carried on a carrier wave and transmitted wirelessly.

As described above, the signal wirelessly transmitted by the transmitter 68 of the system is received by the wireless headphones and output as an audible frequency signal, ie, sound.

As described above, since the embodiment of FIG. 2 is configured, the system transmits a sound source containing almost no noise and sound distortion in view of a very weak signal because the system does not go through a signal processing process accompanied by degradation of the analog sound source. In the wireless headphones, the sound may be output with satisfactory sound quality as compared with the related art.

On the other hand, when limited to the digital input, the embodiment has a configuration for the system area and a wireless headphone area as shown in FIG. 3, among which the components necessary for wireless transmission of sound, that is, the format converter 70 , Selector 72, control unit 74, modulator 76, and transmitter 78.

In the same manner as in the embodiment of FIG. 1, the wireless headphones include components necessary for converting a wirelessly transmitted signal into an audio frequency signal, that is, a receiver 40, a demodulator 42, a decoder 43, and a digital-to-analog converter ( 44, filter 46, headphone amplifier 48, and speaker 50.

In the embodiment of FIG. 2, since the configuration and operation of the wireless headphones are the same as those of the first and second embodiments, overlapping descriptions thereof will be omitted, and components included in the system area may also be replaced with components corresponding to the first embodiment. Do the same.

Therefore, in the third embodiment, digital sound is input to the format converter 70 through the digital input terminal, and the format converter 70 converts the digital format input by the control signal provided from the control unit 74 into a specific format. Convert. In this case, the user selects the format of the input digital sound using the selector 72, the selector 72 provides a signal corresponding to the format selected by the user to the controller 74, and the controller 74 inputs the input signal. The control signal corresponding to the signal is provided to the format converter 70. Therefore, the format converter 70 converts the digital sound having the format selected by the user into a common format, transmits the converted digital signal to the modulator 76, and the modulator 76 transmits a message for wireless transmission of the transmitted signal. The signal is modulated, and the transmitter 78 transmits the signal transmitted from the modulator 76 on a carrier wave and transmits the radio.

As described above, the signal wirelessly transmitted by the transmitter 78 of the system is received by the wireless headphones and output as an audio frequency signal, ie, sound.

As described above, since the embodiment of FIG. 2 is configured, the system transmits a sound source containing almost no noise and sound distortion in view of a very weak signal because the system does not go through a signal processing process accompanied by degradation of the analog sound source. In the wireless headphones, the sound may be output with satisfactory sound quality as compared with the related art.

Accordingly, according to the present invention, the sound quality of the audio system is wirelessly transmitted by wirelessly transmitting an analog or digital sound source containing little noise and sound distortion to the wireless headphones, and restoring the transmitted sound source from the wireless headphones to the speaker. In this way, the sound is output from the wireless headphones accordingly.

Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical spirit of the present invention, and such modifications and modifications are appended with the patent. It is obvious that the claims belong.

Claims (10)

An analog / digital converter for converting an analog sound source input through a line input terminal into a digital signal, An encoder for converting the digital signal output from the analog / digital converter into a digital signal of a predetermined digital format, A format converter for converting a digital sound source input through a digital input terminal into a digital signal in the digital format, A modulator for modulating the digital signal in the digital format received from the encoder or the format converter; A signal transmission system comprising a transmitter for wirelessly transmitting a signal transmitted from the modulator; And A demodulator for receiving and demodulating a signal transmitted wirelessly from the signal transmission system; A decoder for converting the digital signal in the digital format received by the demodulator into the digital signal, A wireless headphone including a headphone amplifier for driving a speaker of the headphone according to the digital signal converted by the decoder; An audio system comprising a. The method of claim 1, The signal transmission system, And a switch configured to transfer the digital signal of the digital format, which is output by selecting the encoder or the format converter according to the input of the analog sound source or the digital sound source, to the modulator. delete The method of claim 1, The signal transmission system, A selector for selecting a digital format; And A control unit which controls the format converter to convert the input digital signal into the digital format selected by the selector; The audio system further comprises. The method of claim 2, The switch, A detector for detecting an input of the analog sound source and the digital sound source and outputting a detection signal corresponding thereto; And A selector for transmitting the digital signal of the digital format to the modulator by selecting the encoder or the format converter according to the detection signal; And said audio system. delete The method of claim 1, The wireless headphones, A filter for filtering the converted analog signal and transmitting the filtered analog signal to the headphone amplifier; The audio system further comprises. In the signal transmission system for wireless headphones for wirelessly transmitting a sound source signal to the wireless headphones, An analog / digital converter for converting an analog sound source input through a line input terminal into a digital signal; An encoder for converting the digital signal output from the analog / digital converter into a digital signal of a predetermined digital format; A format converter for converting a digital sound source input through a digital input terminal into a digital signal in the digital format; A selector for selecting the digital format; A control unit which controls the format converter to convert the input digital signal into the digital format selected by the selector; A modulator for modulating the digital signal in the digital format received from the encoder or the format converter; And A transmitter for wirelessly transmitting a signal transmitted from the modulator; Signal transmission system for wireless headphones comprising a. delete In the wireless headphones of receiving a signal wirelessly from the signal transmission system for wireless headphones of claim 8, A receiver for receiving a signal to be transmitted wirelessly; A demodulator for demodulating a signal received at the receiver; A decoder for decoding the demodulated signal; And A headphone amplifier for driving the speaker of the headphone according to the signal decoded by the decoder; Wireless headphones comprising a.

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