KR20160011051A - Earset and audio signal operrating system including the earset - Google Patents

Abstract

The present invention relates to an earset and an audio signal processing system including the same. The earset, which performs an audio signal processing function by being connected to a device, comprises: a microphone which changes a sound of a user into an electric signal; and a driving element formed to perform a preset function in the audio signal process. The earset receives power from a first power supply inside the device when the microphone is operated, and receives power from a second power supply inside the device when the driving element is operated. When a power supply to the driving element inside the earset is required, the performance of the earset can be increased as the power is supplied from the device. A stable voltage application is possible by using the power applied to the driving element as a bios power of the earset and an additional power.

Description

TECHNICAL FIELD [0001] The present invention relates to an earset and an audio signal processing system including the earset.

The present invention relates to an earphone and an audio signal processing system including the earphone. More specifically, when power supply is required to the drive element in the earset, power is supplied from the device to increase the performance of the earset, And an audio signal processing system including the same. 2. Description of the Related Art

Typically, the earset is connected to devices such as a PC, a mobile phone or a tablet PC, serves as a speaker for music playback, and provides a microphone during a call. Also, as technology develops, there is a great deal of effort to reflect this, as users require low quality music with low loss and low noise, or call quality.

However, since the earset itself does not have an independent power source, it is a common practice to form an active element for enhancing the function of the earset.

The present invention provides an earset capable of receiving power from a device and driving an internal driving element, and an audio signal processing system including the earset.

The earset according to the present invention is connected to a device and performs an audio signal processing function. The earset includes a microphone for converting a user's voice into an electrical signal; And a driving element formed to perform a preset function in the audio signal processing, wherein when power is supplied from a first power source in the device during operation of the microphone, Power can be supplied from the power source.

The switching device may further include a switching circuit for comparing the input voltage applied from the device with a reference voltage to distinguish the first power source or the second power source and connect the microphone or the driving device accordingly.

The switching circuit may determine that power is applied from the first power source when the input voltage is smaller than the reference voltage and from the second power source when the input voltage is greater than the reference voltage.

The apparatus may further include a push-key circuit unit configured to include a plurality of resistors formed in the path to which the power is applied, and a switching element that controls the connection of the resistors and is on-off controlled according to a user's key pressing.

The apparatus may further include a large current induction unit that stops the operation of the driving element when at least one switching element of the push-key circuit unit is turned on while the driving element is receiving power from the second power source .

Also, after the operation of the driving device is stopped, the high current directing unit may connect a large current resistance to generate a large current.

Also, the high current resistance may have a resistance value set so that the generated large current has a value larger than the maximum current consumed in the driving element.

Also, the large current induction unit may operate only when the second power source is connected.

The high current induction unit may include a voltage comparator that compares the input voltage with a reference voltage to determine whether the second power source is connected.

In addition, an audio signal processing system according to the present invention is an audio signal processing system including a device for performing an audio signal processing function and an earset connected to the device, wherein the earset includes a microphone for converting a user's voice into an electrical signal ; And a driving element formed to perform a preset function in the audio signal processing, wherein the device applies power through a first power source inside the device when the microphone is in operation, Power can be applied through the second internal power supply.

Here, the device may include a bias resistor between the first power supply and the earpiece to read a key pressed by a voltage distribution upon key press of the earset.

The device may further include a current detector for sensing a current flowing between the second power source and the earpiece.

Also, the device may control the switching operation so that the first power source is connected when the current sensed through the current detector is greater than the maximum current used by the driving device in a state where the second power source is connected.

In addition, the device may control the switching operation so that the second power source is connected again when the current is cut off while the first power source is connected.

The device may further include a power supply switch unit provided in a path where the first power source and the second power source are connected to the earpiece to perform switching of the power sources.

In addition, the device may control the switching operation so that the first power source is connected through the power supply switch unit when the key press signal is applied from the earset while the second power source is connected.

The earphone and the audio signal processing system including the earphone according to the present invention can provide power to the driving element in the earset while supplying power from the device while maintaining the versatility by using the earset of the quadrupole plug, .

In addition, the earphone and the audio signal processing system including the earphone according to the present invention can supply a stable voltage by using a power source applied to a driving device as a power source separate from a biosource power source of an ear set.

In addition, the earphone and the audio signal processing system including the earphone according to the present invention can detect the key input of the earset when the driving element is driven, so that the operation through the earset can be stably performed.

1 is a schematic configuration diagram of an audio signal processing system according to an embodiment of the present invention.
2 is a plug configuration diagram of an ear set in an audio signal processing system according to an embodiment of the present invention.
3 is a block diagram of an audio signal processing system according to an embodiment of the present invention.
4 is a circuit diagram of an audio signal processing system according to an embodiment of the present invention.
5 is a circuit diagram showing a power supply path to a microphone of an earset in an audio signal processing system according to an embodiment of the present invention.
6 is a circuit diagram showing a power supply path to a driving element of an earset in an audio signal processing system according to an embodiment of the present invention.
7 is a circuit diagram showing a current path when a push key is pressed during power supply to a driving element of an ear set in an audio signal processing system according to an embodiment of the present invention.
8 is a circuit diagram of a large-current induction unit when a key is pressed on an earset in the audio signal processing system according to the embodiment of the present invention.

The present invention can be variously modified and may have various embodiments, and specific embodiments will be described in detail with reference to the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1 is a schematic configuration diagram of an audio signal processing system according to an embodiment of the present invention. 2 is a plug configuration diagram of an ear set in an audio signal processing system according to an embodiment of the present invention.

Referring first to FIG. 1, an audio signal processing system according to an embodiment of the present invention includes a device 100 and an earset 200.

The device 100 refers to a device capable of generating an audio signal to a user such as a PC, a mobile phone, a tablet PC, an MP3 player, a CD player, and the like. The device 100 may implement a call function through a voice signal as an example of an audio signal.

The earset 200 is connected to the device 100 through a plug 210. The earset 200 outputs an audio signal from the device 100 and allows a user to transmit audio through a microphone provided therein.

Referring to FIG. 2, the plug 210 at the end of the earset 200 according to the embodiment of the present invention is composed of a four-pole plug like the conventional earset. More specifically, each pole constituting the plug 210 includes a microphone terminal 211, a ground terminal 212, a first side output terminal 213, and a second side output terminal 214, . Here, the first side output terminal 213 may be a right speaker terminal of the earset, and the second side output terminal 214 may be a left speaker terminal of the earset, but the left and right may be changed according to the choice of a person skilled in the art. The terminals 211, 212, 213 and 214 of the plug 210 are electrically connected to the device 100 via the contacts 211a, 212a, 213a and 214a, respectively, . Since the plug 210 is a commonly used four pole, an earset 200 according to an embodiment of the present invention may also be coupled to a conventional device 100.

Hereinafter, the configuration and operation of an audio signal processing system according to an embodiment of the present invention will be described in more detail.

3 is a block diagram of an audio signal processing system according to an embodiment of the present invention. 4 is a circuit diagram of an audio signal processing system according to an embodiment of the present invention. 5 is a circuit diagram showing a power supply path to a microphone of an earset in an audio signal processing system according to an embodiment of the present invention. 6 is a circuit diagram showing a power supply path to a driving element of an earset in an audio signal processing system according to an embodiment of the present invention. 7 is a circuit diagram showing a current path when a push key is pressed during power supply to a driving element of an ear set in an audio signal processing system according to an embodiment of the present invention.

3 and 4, in an audio signal processing system according to an embodiment of the present invention, a device 100 includes a processor 110, a bios voltage application unit 120, a power supply switch unit 130, 140, and a current detector 150.

The processor 110 may be an embedded cellular phone processor when the device 100 is a cellular phone and outputs an audio signal to the earset 200 and outputs a microphone input signal or a push key signal .

The processor 110 controls the power supply switch unit 120 so that the bias voltage V0 is applied through the bias voltage applying unit 130 when the microphone 230 of the earset 200 is in operation, When a voltage is applied to the driving element 250 of the earset 200, the driving voltage Vbat is applied through the driving power supply 140 as shown in FIG.

The bias voltage V0 of the bias voltage applying unit 130 is about 2.8 V and drives the microphone 250 of the earset 200 or detects a key press of the switching circuit unit 220 Can be used. The bias resistor R0 connected to the bias voltage applying part 130 and the key pressing part 220 of the earset 200 in the path where the bias voltage V0 detects the key press of the earset 200, The input voltage V-in of the earset 200 is changed because one of the resistance components (one of R1 to R4) is connected in series. Accordingly, the processor 110 can recognize the input of the pressed key through the input voltage V-in, and thus control the output signal.

Meanwhile, the bias voltage applying unit 130 is a power source that is difficult to apply sufficient power to drive the driving element 250 of the earpiece. That is, since the current that can be supplied by the bias voltage applying unit 130 is relatively small, it is difficult to use the power supply for the earset 200.

For this purpose, in the audio signal processing system according to the embodiment of the present invention, a separate power source driving power source unit 140 provided in the device 100 is used, and the driving power source unit 140 includes an LDO ). ≪ / RTI > The driving voltage Vbat of the driving power supply 140 may be about 3.3 V and may supply a sufficient current to the bias voltage applying unit 130. In addition, since no separate resistance component is provided in the path of the saved power source unit 140, power loss is prevented from being generated when power is supplied to the earset 200.

The current detector 150 is located between the driving power unit 140 and the power supply switch unit 120. The current detector 150 detects a current applied from the driving power source 140 to the driving element 250 of the earset 200 and converts the current into a voltage value. Therefore, since the current detector 150 does not consume power in the power supply path from the driving power supply 140, efficient and stable power supply is possible. The current detector 150 converts the current into a voltage and applies the current to the processor 110 through an internal resistance component or the like.

Also, the processor 110 compares the signal of the current detector 150 with a reference signal. 7, when one of the switching elements SW1 to SW4 is turned on and the resistance components R1 to R4 are connected and connected to the current path, , The total resistance becomes small, so that the current increases. Accordingly, the processor 110 controls the power supply switch unit 120 to connect the bias voltage applying unit 130 instead of the driving power supply unit 140. The bias resistor R0 of the bias voltage applying unit 130 and the resistive component R3 of the pressed key are connected in series so that the input voltage V-in to the earset 200 is varied by voltage distribution . In addition, the processor 110 can determine whether a key is pressed by reading the input voltage V-in, thereby performing a control operation.

When the key input through the switching circuit unit 220 is completed and the switching device SW3 is opened, the processor 110 again controls the driving power source unit 140 to be connected again through the power supply switch unit 120 Power can be supplied to the driving element 250 of the earset 200.

Hereinafter, the earphone configuration and operation in the audio signal processing system according to the embodiment of the present invention will be described in more detail.

3 to 7, in the audio signal processing system according to the embodiment of the present invention, the earset 200 includes a switching circuit 220, a microphone 230, a high current induction unit 240, a driving device 250 ).

The switching circuit unit 220 includes an input voltage sensing unit 221 and a path switching unit 222 connected to the current path applied to the earset 200. The input voltage sensing unit 221 senses a voltage level of the input voltage V-in. If the bias power applying unit 130 is connected to the power supply of the device, since the bias resistor R0 of about 2.2 KΩ is connected to the path, the input voltage V- in is approximately 2.1 [V] to 2.5 [V]. Meanwhile, when the driving power source 140 of about 3.3 V is connected to the power source of the device, a separate resistor is not connected and the input voltage V-in becomes about 2.8 V. Thus, the switching circuit 220 compares the reference voltage with the input voltage V-in, connects the microphone 230 to the input voltage V-in when the input voltage V-in is smaller than the reference voltage, (V-in) is greater than a reference voltage, the path switching unit 222 is controlled to be connected to the driving device 250.

The switching circuit unit 220 includes resistance elements R1 to R4 connected in parallel to a path from the device 100 for push key operation and switching elements SW1 to SW4 for controlling the respective connection And a key pushing circuit portion 223. The resistance components R1 to R4 are configured to have different resistance values, and on / off of the switching elements SW1 to SW4 is controlled by the key pressing operation of the user. Accordingly, when the key is depressed, one of the resistance components R1 to R4 is connected to the path, and is connected in series with the bias resistor R0 of the bias voltage applying unit 130. [ Accordingly, as described above, the input voltage V-in of the earpiece 200 is changed, and the processor 110 recognizes the input voltage V-in to perform the necessary control operation.

The microphone 230 basically converts a user's voice into an electric signal during a call, and transmits the electric signal to the device 100 through the earset 200. The microphone 230 receives power from the bias voltage application unit 130 and can be driven through the bias voltage application unit 130.

When a voltage is applied to the driving element 250 of the earset 200 and the key input is detected by the switching circuit 220, the large current induction unit 240 detects the input, Lt; / RTI >

8 is a circuit diagram of a large-current induction unit when a key is pressed on an earset in the audio signal processing system according to the embodiment of the present invention.

8, the high current induction unit 240 includes a control unit 241, a chip control switch 242, a resistance connection control switch 243, a high current resistance 244, and a voltage comparator 245.

The controller 241 may include a microcontroller unit (MCU) or a logic circuit. When the controller 241 turns on any one of the switching elements SW1 to SW4, The operation of the driving element 250 is stopped.

Also, the controller 241 turns on the resistance connection control switch 243 to allow the current through the high current resistor 244 to flow. Here, the high current resistance 244 is set to have a sufficiently small resistance value, and the current flows in a larger current than the maximum current used in the driving element 250.

Therefore, in the processor 110 of the device 100, a key is pressed to recognize that the large current induction unit 240 has generated a large current, whereby the processor 110, as described above, The process proceeds to a step of switching to the application unit 130 and reading the pressed key. When the operation of depressing the key is completed and all the switching elements SW1 to SW4 of the key pressing circuit unit 223 are opened to interrupt the current, the processor 110 of the device 100 again starts the driving The power supply unit 140 may be connected to the driving device 250 so that power may be applied to the driving device 250.

The voltage comparator 245 compares the input voltage V-in with a reference voltage and allows the controller 241 to operate only when the current power source is connected to the driving power source 140. It is possible to read the key pressed by the bias voltage applying unit 130 and the bias resistor R0 without operating the large current induction unit 240 when the bias voltage applying unit 130 is connected to be.

The driving device 250 is provided inside the earset 200 and can receive a voltage from the device 100 to improve an audio signal processing function. As the type of the driving device 250, an active device such as a noise canceling chip that performs a function of analyzing a sound wave and generating a sound wave opposite to the noise to block the noise may be used.

It is to be understood that the present invention is not limited to the above-described embodiment, and that various modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

100; Device 110; Processor
120; A power supply switch unit 130; The bias-
140; A driving power supply unit 150; The high-
200; Earset 210; plug
220; A switching circuit 230; MIC
240; A large current induction unit 250; Driving element

Claims (16)

1. An earset connected to a device for performing an audio signal processing function,
A microphone for converting a user's voice into an electrical signal; And a driving element formed to perform a predetermined function in the audio signal processing,
Wherein power is supplied from a first power source inside the device when the microphone is operated and power is supplied from a second power source inside the device when the driving device operates. The method according to claim 1,
Further comprising a switching circuit portion for comparing the input voltage applied from the device with a reference voltage to distinguish whether the first power source or the second power source is connected and thereby connect the microphone or the driving element. 3. The method of claim 2,
Wherein the switching circuit determines that power is applied from the first power source when the input voltage is smaller than the reference voltage and from the second power source when the input voltage is greater than the reference voltage. The method according to claim 1,
And a push-key circuit unit configured to control a connection of the resistors and a switching element whose on-off is controlled in response to a key depression of a user. 5. The method of claim 4,
Further comprising a large current induction portion for stopping the operation of the driving element when at least one switching element of the pushing key circuit portion is turned on in a state where the driving element is receiving power from the second power source. 6. The method of claim 5,
Wherein the large current induction unit connects a large current resistance after the operation of the driving element is stopped to generate a large current. The method according to claim 6,
Wherein the high current resistance has a resistance value set so that the generated large current has a value larger than a maximum current consumed in the driving element. 6. The method of claim 5,
Wherein the large current induction unit is operated only when the second power source is connected. 9. The method of claim 8,
Wherein the large current induction unit includes a voltage comparator for comparing the input voltage with a reference voltage to determine whether the second power source is connected. 1. An audio signal processing system including a device for performing an audio signal processing function and an earset connected to the device,
The earset includes a microphone for converting a user's voice into an electrical signal; And a driving element formed to perform a predetermined function in the audio signal processing,
Wherein the device applies power through a first power source in the device during operation of the microphone and applies power through a second power source within the device during operation of the driving device. 11. The method of claim 10,
Wherein the device comprises a bias resistor between the first power source and the earpiece to read a key pressed by a voltage distribution upon key press of the earset. 11. The method of claim 10,
Wherein the device further comprises a current detector for sensing a current flowing between the second power source and the earpiece. 13. The method of claim 12,
Wherein the device controls the switching operation so that the first power source is connected when the current sensed through the current detector is greater than a maximum current used by the driving device in a state where the second power source is connected. 14. The method of claim 13,
Wherein the device controls the switching operation so that the second power source is reconnected when the current is cut off while the first power source is connected. 11. The method of claim 10,
Wherein the device further comprises a power supply switch unit provided in a path where the first power source and the second power source are connected to the earpiece to perform switching of the power sources. 16. The method of claim 15,
Wherein the device controls the switching operation so that the first power source is connected through the power supply switch unit when a key press signal is applied from the earset while the second power source is connected.

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