CN201213259Y - Wireless audio system capable of outputting stereo sound - Google Patents

Abstract

The utility model discloses a can balance wireless audio system of output stereo effect, this system is connected with a wireless earphone device and a stereo output device, provides the balanced stereo sound signal of left and right sound channels. The wireless earphone device is provided with a compression/decompression module which is used for decompressing a digital sound packet received by wireless transmission into a stereo sound signal; then transmitting to a detection connection module, judging whether the wireless earphone device is connected with the stereo output device by the detection connection module, if the two devices are not connected, outputting the stereo sound signal by a first loudspeaker unit in the wireless earphone device; if the two devices are connected with each other, the stereo sound signal is transmitted to the stereo output device from the wireless earphone device and is output by a second loudspeaker unit and a third loudspeaker unit respectively. The utility model provides a can exert wireless audio system who supports the stereo function completely.

Description

Wireless audio system with stereo output

technical field

The utility model relates to a wireless audio system, in particular to a wireless audio system with stereo output effect.

Background technique

Due to the maturity and convenience of wireless communication technology, for example, Bluetooth communication is currently widely used in short-distance wireless transmission; especially with the development of more and more diversified functions of mobile communication devices, Bluetooth technology is not only used for data synchronization. It is used as a wireless transmission medium between a wireless headset microphone and a mobile communication device (such as a mobile phone). In particular, a variety of multi-functional mobile phones that can listen to music have been developed on the market. With a single-ear-mounted hands-free Bluetooth headset, users can not only answer incoming calls from the mobile phone, but also listen to music played from the Bluetooth mobile phone at other times. .

The Bluetooth Special Interest Organization (Bluetooth SIG), which promotes the development of Bluetooth technology, has formulated the Advanced Audio Distribution Profile (A2DP) specification in order to enable users of Bluetooth devices to listen to high-quality music through Bluetooth headsets. Both mobile phones and wireless earphones of the user support A2DP. Such Bluetooth devices can provide users with stereo sound output with CD-quality sound quality, replacing the practice of ordinary mobile phone earphones that can only play monophonic sound.

However, the current common bluetooth headset is still a single-ear ear-hook headset. Since only one ear is equipped with a headset as a sound output device, even if the mobile phone and the headset support A2DP, the user still cannot experience good music playback sound quality. . In view of this, there is currently a stereo earphone device on the market that is connected to the earphone of the other ear and divides the sound into two ear outputs, such as the device disclosed in Taiwan's new patent No. M299999, which assists the original monophonic earphone device. Ear bluetooth headset for binaural sound output.

Although this method solves the problem of only unilateral earphones, it is an auxiliary method: it first makes a single-ear monophonic earphone, and then makes another unilateral external second-ear earphone. The attached connecting cable is connected to the original single-ear earphone, and finally receives the sound signal transmitted by the original single-ear earphone; the balance of the channel output produced by this method will be affected by the fact that the two-ear earphones are not produced at the same time or at the same time. There are slight differences due to inspection, for example, it sounds louder on one side and quieter on the other, or clearer on one side and more noisy on the other, so the output sound quality is still not as good as that of the original binaural stereo headphones. Compared with the sound quality that can be output, it is also easy to cause the listener's hearing experience is not good; considering that the other earphone connected must be used with the original single-ear Bluetooth headset, if the second earphone is removed, it is not compatible with the original When paired with a monophonic headset, it cannot play any audio-visual function by itself, so the application range of this type of stereo headset is limited. Based on the above analysis, how to make the wireless earphone device output a balanced and beautiful stereo sound is indeed a work worthy of review and improvement.

Contents of the invention

In order to solve the above problems and improve the deficiencies of current products on the market, the utility model proposes a wireless audio system that is simple and can fully support stereo functions.

The system includes a wireless earphone device and a stereo output device. The wireless earphone device includes a communication module, a detection connection module, a first speaker unit and a sound source output unit. The communication module has a second transmission module and a compression/decompression module: the wireless earphone device communicates with the audio transmission device by sending and receiving data with a first transmission module in the audio transmission device through the second transmission module; The compression/decompression module is used to decompress a digital sound packet received by the second transmission module into a stereo sound signal, and the stereo sound signal can be divided into a first sound channel signal and a second sound channel signal. In addition, the detection connection module is connected to a first speaker unit and a sound source output unit in the wireless earphone device, and judges whether the stereo sound signal should be transmitted by the first speaker unit or a sound source output unit according to whether the sound source output unit generates a connection signal. Audio output unit output.

The stereo output device includes a sound source input unit, a second speaker unit and a third speaker unit. The sound source input unit communicates with the wireless headphone device by connecting the sound source output unit, and receives the stereo sound signal output by the wireless headphone device through the sound source output unit; Generated when units are connected to each other. The sound source input unit transmits the received first channel signal of the stereo sound signal to the output of the second speaker unit, and transmits the second channel signal to the output of the third speaker unit.

The means proposed above, by connecting to a stereo output device with dual speaker units, and detecting the connection status and arranging the audio output pipeline by the detection connection module, can make a wireless earphone device that supports stereo but only has a single speaker Fully exert the effect of its stereo output, and avoid the disadvantage of unbalanced sound or sound quality during stereo output.

In addition, because the wireless earphone device is only connected to the stereo output device, the comfort when listening to stereo sound is improved, and the original wireless data transmission function of the wireless earphone device is not affected at all; The wireless earphone device of the speaker unit has a hands-free design. Under the structure of the utility model, it is not affected at all, and the user can still enjoy the convenience of hands-free.

Moreover, because the stereo output device is used to receive the input of the audio source and then play it, when the stereo output device is not connected with the wireless earphone device, it may still be applicable to other wired devices, or directly connected to audio and video transmission devices, and It is not limited to be used only in connection with the wireless earphone device, has high practicability, and also reduces the cost of stereo output devices required by various audio devices.

The stereophonic output system achieved by connecting a stereophonic output device is completely different from the general method of combining two monophonic output devices with connecting wires, and through the technical means used in the utility model, the sound quality effect, Practicality and convenience are by no means comparable to the latter.

Description of drawings

Fig. 1 is a block diagram of a wireless audio system embodiment of a utility model that can output stereo;

Fig. 2 is a circuit block diagram of a wireless earphone device embodiment of the present invention;

3A and 3B are circuit diagrams of an embodiment of a wireless earphone device capable of outputting stereo sound according to the present invention;

Fig. 4 is a schematic diagram of a wireless audio system embodiment of the utility model that can output stereo;

Fig. 5 is a schematic diagram of another embodiment of the connection mode of the wireless audio system capable of outputting stereo sound of the present invention; and

Fig. 6 is a schematic diagram of another embodiment of the connection mode of the wireless audio system capable of outputting stereo sound according to the present invention.

And, the reference numerals in the above-mentioned accompanying drawings are explained as follows:

1 mobile phone

10 audio transmission device

100 first transmission module

2, 2a single ear bluetooth headset

20 wireless headphone unit

22 communication module

200 second transmission module

205 compression/decompression module

210 signal conversion unit

215 detection connection module

220 first speaker unit

2201 speaker

225 audio output unit

2251 USB slot

2253 audio jack

230 radio unit

2301 microphone

235 ear hook

3, 3a binaural stereo headphones

30 stereo output devices

300 audio input unit

3001 USB plug

3003 audio plug

305 second speaker unit

3051 Second speaker

310 third speaker unit

3101 Third speaker

315 Adapter

40 bluetooth module

42 Detection connection module

400 antenna elements

405 Charging unit

410 reset unit

415 First audio control unit

420 mono speaker unit

425 signal connection unit

430 Second audio control unit

435 microphone unit

440 flash cells

445 light indicating unit

450 battery cells

455 voltage unit

460 switching unit

465 oscillator unit

400a～465a circuit

Detailed ways

In order to further illustrate the purpose of the utility model and make it easier to understand the technical means of the utility model, the implementation method of the utility model will be illustrated below with examples.

FIG. 1 is a block diagram of an embodiment of a wireless audio system capable of stereo output according to the present invention: the system includes a wireless earphone device 20 and a stereo output device 30 . The wireless earphone device 20 receives the audio from the audio transmission device 10 through wireless transmission technology, and is connected to the stereo output device 30 to output the audio from the audio transmission device 10 .

The wireless earphone device 20 includes a communication module 22 , a detection connection module 215 , a first speaker unit 220 , a sound source output unit 225 and a sound receiving unit 230 . The communication module 22 also includes a second transmission module 200 for sending and receiving audio, a compression/decompression module 205 for compressing or decompressing the audio sent and received by the second transmission module 200, and a signal conversion unit 210 to convert the decompressed The audio is converted from a digital sound signal to an analog sound signal. The analog sound signal produced by the communication module 22 is transmitted to the detection connection module 215 , and the detection connection module 215 determines that the sound signal should be transmitted to the first speaker unit 220 or the sound source output unit 225 for output.

The stereo output device 30 then includes a sound source input unit 300, a second speaker unit 305 and a third speaker unit 310, the stereo output device 30 is connected with the sound source output unit 225 of the wireless earphone device 20 through the sound source input unit 300, Further, the audio signal output by the wireless earphone device 20 is received and transmitted to the second speaker unit 305 and the third speaker unit 310 for output.

The wireless earphone device 20 communicates with the audio transmission device 10 through the second transmission module 200 to send and receive signals of the first transmission module 100 . In this embodiment, the second transmission module 200 in the communication module 22 receives a compressed and encoded digital sound packet from the audio transmission device 10, and transmits the packet to the compression/decompression module 205, and the digital sound packet Decompression restores to a stereo sound signal.

The stereo sound signal is still a digital sound signal, and can be divided into a first sound channel signal and a second sound channel signal to create a stereo sound effect. In order to make the sound signal suitable for playing, the signal conversion unit 210 is used to convert the stereo sound signal into an analog sound signal. After the sound is converted into an analog signal, the detection connection module 215 is used to detect whether the stereo output device 30 is connected to the wireless earphone device 20: when the sound source input unit 300 and the sound source output unit 225 are connected to each other, the sound source output unit 225 will generate a connection signal , and the detection connection module 215 detects whether the connection signal is generated or not, so as to know whether the wireless earphone device 20 and the stereo output device 30 are connected to each other.

If the two devices are not connected (that is, no connection signal is detected), the connection detection module 215 transmits the simulated stereo audio signal to the first speaker unit 220 for output. However, since the wireless earphone device 20 has only a single speaker unit, even if the wireless earphone device 20 supports stereo output, only monophonic output sound can be heard from the first speaker unit 220 .

On the contrary, if the detection connection module 215 finds that the wireless earphone device 20 is connecting the stereo output device 30 with the second speaker unit 305 and the third speaker unit 310 through the sound source output unit 225, the detection connection module 215 then outputs the stereo sound signal The pipeline is switched to the audio source output unit 225 , so that the stereo audio signal is transmitted from the audio source output unit 225 to the stereo output device 30 .

The stereo output device 30 receives the stereo sound signal transmitted by the sound source output unit 225 of the wireless earphone device 20 through the sound source input unit 300, and transmits the first channel signal and the second channel signal of the stereo sound signal to the second speaker respectively. The sound unit 305 and the third speaker unit 310 output, and the user can directly use the stereo output device 30 with left and right channels to listen to complete and balanced stereo sound.

The wireless earphone device 20 also includes a radio unit 230 for receiving an external input voice, such as a user's voice, and the external input voice is sent to the signal conversion unit 210 to be converted into a digital audio signal, and then delivered to the compression/decompression The compression module 205 compresses it into packet data, and finally sends it to the audio transmission device 10 through the second transmission module 200 for transmission.

Fig. 2 is a circuit block diagram of an embodiment of the wireless earphone device in a wireless audio system capable of outputting stereo sound according to the present invention, and Fig. 3A and Fig. 3B are circuit diagrams of this embodiment, in order to avoid the inconvenience of reading due to too small illustrations, therefore Each circuit module in this embodiment is divided into two parts (U1_A and U1_B), which are drawn in FIG. 3A and FIG. 3B respectively, but they belong to the circuit modules on the same circuit chip, which will be described here first.

In this embodiment, the wireless earphone device 20 is a wireless bluetooth earphone for wireless transmission and reception using bluetooth technology, which includes a bluetooth module 40, a charging unit 405, a reset unit 410, a detection connection module 42, a monophonic speaker unit 420, a signal Connection unit 425, microphone unit 435, flash memory unit 440, light indicator unit 445, battery unit 450, voltage unit 455, switching unit 460 and oscillation unit 465, wherein the detection connection module 42 also includes a first audio control unit 415 and The second audio control unit 430 .

The headset uses a bluetooth module 40 to communicate with the audio transmission device 10 through the antenna unit 400 to send and receive digital sound packets, and the received digital sound packets are decompressed into a stereo sound signal by the bluetooth module 40, and then converted into an analog signal stereo sound signal. For the circuit diagram of the antenna unit 400, please refer to 400a of FIG. 3A (please refer to FIGS. 3A and 3B for the following circuit diagrams).

The second audio control unit 430 in the detection connection module 42 transmits the left channel signal to the signal connection unit 425; and the first audio control unit 415 uses a multiplexer to control the right channel signal to be transmitted to the monophonic speaker unit 420 Or the signal connection unit 425 . If the wireless bluetooth earphone is not connected to the stereo output device 30, the first audio control unit 415 will output the sound signal of the right channel to the monophonic speaker unit 420; but after the two devices have been connected, the first audio control unit The unit 415 selects to transmit the right channel signal to the signal connection unit 425, cooperate with the left channel signal transmitted to the signal connection unit 425, and the signal connection unit 425 transfers the two channel signals to an external stereo output device 30, the right channel signal is output from the right speaker unit (such as the second speaker unit 305) of the stereo output device 30, and the left channel signal is output from the left speaker unit (such as the third speaker unit 310) output. Please refer to 415 a to 430 a for the circuit diagrams of the circuit components of the first audio control unit 415 to the second audio control unit 430 .

The microphone unit 435 is used to use the bias circuit required by the sound receiving unit 230 and generate voice signals. Please refer to 435a for its circuit diagram. The charging unit 405 provides slight power to the Bluetooth module 40 for charging the battery, please refer to 405a; the reset unit 410 is used for restarting the Bluetooth module 40 during charging, please refer to 410a for its circuit diagram. The flash memory unit 440 is used to store the firmware of the Bluetooth module 40, please refer to 440a; there is another light indicator unit 445, please refer to 445a for its circuit diagram, which is used to control various LED lights displayed when the wireless Bluetooth headset is used; The battery unit 450 is used to provide the power required by the entire wireless Bluetooth headset. Please refer to 450a for its circuit diagram; the voltage unit 455 uses the power provided by the battery unit 450 to supply the working voltage required by the Bluetooth module 40. For its circuit diagram, please refer to See 455a.

Finally, there is a switching unit 460 and an oscillation unit 465. The switching unit 460 is used to control various switching and adjustment functions provided by the wireless Bluetooth headset, such as power on/off, device pairing, volume adjustment, etc. For its circuit diagram, please refer to 460a; oscillation The unit 465 provides the working sequence required for using the bluetooth module 40 , and its circuit diagram please refer to 465 a.

FIG. 4 is an implementation schematic diagram of a wireless audio system capable of outputting stereo sound according to the present invention, which will be described together with the blocks in FIG. 1 below.

This embodiment is a wireless bluetooth earphone system, which includes a single-ear bluetooth earphone 2 and a binaural stereo earphone 3 that support A2DP bluetooth stereo output. The single-ear bluetooth headset 2 sends and receives data with the first transmission module 100 in the mobile phone 1 through the second transmission module 200 in the communication module 22, so as to achieve the purpose of communicating with the mobile phone 1. The communication module 22 here is Bluetooth wireless communication module. After the mobile phone 1 capable of playing music transmits the music sound packet to the single-ear Bluetooth headset 2, the compression/decompression module 205 decompresses the packet and restores it to a stereo sound signal, and uses the A2DP decoder to calculate the stereo sound The signal outputs the first channel signal and the second channel signal required for stereo sound, and then the above-mentioned stereo sound signal is converted into an analog sound signal by the signal conversion unit 210 so as to be suitable for output from the speaker unit.

Before the output of the converted stereo sound signal, the detection connection module 215 detects whether the single-ear bluetooth earphone 2 is connected to the binaural stereo earphone 3 through the USB plug 3001 and the USB slot 2251, if not, then the stereo sound signal can only be transmitted from the single ear. The loudspeaker 2201 on the bluetooth earphone 2 outputs a monophonic signal; otherwise if the single-ear bluetooth earphone 2 is connected to the binaural stereo earphone 3 through the USB interface, the detection connection module 215 promptly switches the pipeline of the stereo sound signal output, indicating that it is transmitted to the binaural stereo The earphone 3 outputs the first channel signal and the second channel signal (ie left and right channel signals) of the stereo audio signal through the second speaker 3051 and the third speaker 3101 respectively.

After the user inserts the binaural stereo headset 3 into the single-ear Bluetooth headset 2, and then uses the binaural stereo headset 3 to listen to the sound output of the mobile phone 1, not only can experience the stereo sound with a sense of space, but the original single-ear Bluetooth As long as the earphone 2 is fastened on the collar or the length of the earphone cable is controlled, the built-in microphone 2301 can still be used to input voice signals, retaining the advantage of the hands-free earpiece. If when the single-ear bluetooth earphone 2 and the binaural stereo earphone 3 are connected to each other, the mobile phone 1 receives an incoming call, and its sound output can still be transmitted in the same way as the aforementioned music sound signal, allowing the user to utilize the binaural stereo earphone 3 to listen to the incoming call , and the microphone 2301 on the single-ear bluetooth headset 2 to speak. However, the audio transmission device 10 in this system is not limited to the mobile phone 1, and can also be other audio transmission devices that can be connected wirelessly, such as music playback devices such as MP3 and MP4.

In addition, the above method of connecting the single-ear bluetooth headset 2 and the binaural stereo headset 3 can be connected to the USB slot 2251 by using the USB plug 3001, of course, other interfaces that can be connected and transmit sound signals can also be designed for connection and transmission, such as The audio hole 2253 of another one-ear bluetooth earphone 2a as shown in Figure 5 is connected with the audio plug 3003 of another binaural stereo earphone 3a; Or as shown in Figure 6, provide USB plug 3001 and audio hole 2253 by an adapter 315 The audio plug 3003 of the binaural stereo headset 3a is first connected to the audio hole 2253 of the adapter 315, and then the USB plug 3001 on the other side is connected to the USB slot 2251 of the single-ear Bluetooth headset 2. Ear Bluetooth headset 2 slot space, and convenience for users to use the effect of low cost, easy to obtain audio plug 3003 headset.

To sum up the description and implementation of the utility model mentioned above, a simple and effective method has been disclosed, so that the wireless earphone with only unilateral speaker output can also have the effect of stereo output, and the output according to the means of the utility model Stereo sound signal, there will be no problem of uneven quality or volume of the left and right channels, and it can still be installed or disassembled at any time according to the user's wishes, which greatly improves the performance of the single-sided earhook earphones currently on the market. practicality.

It should be noted that the items listed above are only some of the devices applicable to the utility model, and are not used to limit the applicable scope of the utility model. The contents of the technical means all belong to the scope of protection covered by the utility model.

Claims (10)

1, a kind of exportable stereosonic wireless audio system is applicable to the audio transmission device with one first transport module, it is characterized in that, comprising:

One wireless earphone device comprises:

One communication module comprises: one second transport module connects this first transport module by Radio Transmission Technology, and receive and dispatch a digital audio package between this wireless earphone device and this audio transmission device; And a compression/de-compression module, being connected in this second transport module, its this digital audio package decompress(ion) that is used for this second transport module is received is condensed to a stereo sound signal, and this stereo sound signal is divided into one first sound channel signal and one second sound channel signal; And

One first speaker unit is used to export this stereo sound signal;

One source of sound output unit is used to produce one and connects signal and export this stereo sound signal; And

One detects link block, be connected in this first speaker unit and this source of sound output unit, receive this stereo sound signal after this compression/de-compression module decompresses, and detect this source of sound output unit and whether produce this connection signal, should be sent to this first speaker unit or the output of this source of sound output unit to judge this stereo sound signal; And

One stereo output device comprises:

One source of sound input unit is linked up with this wireless earphone device via connecting this source of sound output unit, and receives this stereo sound signal of being exported by this source of sound output unit;

One second speaker unit receives this stereo sound signal that this source of sound input unit is transmitted, and exports this first sound channel signal of this stereo sound signal; And

One the 3rd speaker unit receives this stereo sound signal that this source of sound input unit is transmitted, and exports this second sound channel signal of this stereo sound signal;

Wherein, when this source of sound input unit connected this source of sound output unit, this source of sound output unit produced this connection signal.

2, exportable stereosonic wireless audio system as claimed in claim 1, it is characterized in that, this detection link block switches to this source of sound output unit output with this stereo sound signal from this first speaker unit when detecting this source of sound output unit and produce this connection signal.

3, exportable stereosonic wireless audio system as claimed in claim 1 is characterized in that this wireless earphone device also comprises:

One signal conversion unit is connected between this compression/de-compression module and this detection link block, and this stereo sound conversion of signals that is used for this compression/de-compression module is decompressed is analog signal; And

One radio reception unit is used to receive outside input voice, and should outside input voice be sent to this signal conversion unit and be converted to a digital audio signal.

4, exportable stereosonic wireless audio system as claimed in claim 3, it is characterized in that, after this compression/de-compression module receives this digital audio signal and its coding become packet data, be sent to this second transport module for linking up with this audio transmission device.

5, exportable stereosonic wireless audio system as claimed in claim 1 is characterized in that, this source of sound output unit is a general-purpose serial bus USB slot, and this source of sound input unit is a USB plug.

6, exportable stereosonic wireless audio system as claimed in claim 1 is characterized in that, this source of sound output unit is an audio frequency hole, and this source of sound input unit is an audio jack.

7, exportable stereosonic wireless audio system as claimed in claim 1 is characterized in that, also comprises:

One adapter, it is connected between this source of sound output unit and this source of sound input unit, and an end of this adapter is connected in this source of sound output unit, and the other end is connected in this source of sound input unit.

8, exportable stereosonic wireless audio system as claimed in claim 7 is characterized in that:

This adapter connects an end of this source of sound output unit, be this USB plug, the end that this adapter connects this source of sound input unit is this audio frequency hole, and this source of sound output unit is this USB slot, and this source of sound input unit is this audio jack.

9, exportable stereosonic wireless audio system as claimed in claim 1 is characterized in that, this audio transmission device is a mobile phone or a music player.

10, the exportable stereosonic wireless audio system of stating as claim 1 is characterized in that, this communication module is a bluetooth module.

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