CN210609655U

CN210609655U - Sound box and sound system

Info

Publication number: CN210609655U
Application number: CN201921815624.3U
Authority: CN
Inventors: 匡平
Original assignee: Zhuhai Legang Science & Technology Co ltd
Current assignee: Zhuhai Legang Science & Technology Co ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-05-22
Anticipated expiration: 2029-10-25

Abstract

The utility model discloses a stereo set and audio system, this stereo set enlarge module, audio input end and audio output including control module, sound channel transform module and the audio frequency that connects gradually, control module with the sound channel transform module equally divide do not with the audio input end with the audio output end is connected to equally divide and do not be used for acquireing the audio input end with the detected signal that the audio output end is connected with external equipment, control module still is used for sending the audio signal after decoding for the sound channel transform module, the sound channel transform module is used for according the detected signal carries out the sound channel transform, and will audio signal passes through the output is enlarged to the audio frequency module. The sound channel conversion module is connected with external equipment through detecting the audio input end and the audio output end, and carries out automatic conversion of the sound channel according to the detection signal, and the pairing of the left and right sound channels does not need to be set according to the interface of the audio playing source, so that the left and right sound channels of the sound box can be paired conveniently.

Description

Sound box and sound system

Technical Field

The utility model relates to an audio playback equipment technical field, in particular to stereo set and audio system.

Background

The left and right sound channels of the audio product are usually set according to the interface of the audio playing source (such as a computer, a television and the like), the audio product does not have the function of automatically matching the left and right sound channels, and although the interface usually adopts different colors to distinguish the left and right sound channels, the interface of the left and right sound channels is easily mixed for users who are not familiar with the aspect, so that the left and right sound channels do not correspond to the placement positions of the audio, and the user experience is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a stereo set, the sound channel of controlling of stereo set product that can be convenient for pairs.

The utility model discloses still provide a sound system who has above-mentioned stereo set.

According to the utility model discloses a stereo set of first aspect embodiment, including the control module, sound channel transform module, audio frequency amplification module, audio input end and the audio output that connect gradually, control module with the sound channel transform module equally divide do not with the audio input end with the audio output end is connected to equally divide and do not be used for acquireing the audio input end with the detected signal that the audio output end is connected with external equipment, control module still is used for sending the audio signal after decoding for the sound channel transform module, the sound channel transform module be used for according to detected signal carries out the sound channel transform, and will audio signal passes through the output is amplified to the audio frequency amplification module.

According to the utility model discloses stereo set has following beneficial effect at least:

the sound channel conversion module is connected with external equipment through detecting the audio input end and the audio output end, and carries out automatic conversion of the sound channel according to the detection signal, and the pairing of the left and right sound channels does not need to be set according to the interface of the audio playing source, so that the left and right sound channels of the sound box can be paired conveniently.

According to some embodiments of the present invention, the sound channel conversion module comprises at least three controllable single-pole double-throw switches, at least three controllable single-pole double-throw switches comprise a switch K1, a switch K2 and a switch K3, the control module comprises a left sound channel audio signal output DACL and a right sound channel audio signal output DACR, the left sound channel audio signal output DACL is connected with the normally open end of the switch K1, the right sound channel audio signal output DACR is connected with the normally open end of the switch K2 and the normally closed end of the switch K3, respectively, the dead end of the switch K1 is connected with the normally closed end of the switch K2, the audio input end, the audio output end and the normally open end of the switch K3, the dead end of the switch K2 and the dead end of the switch K3 are connected with the audio amplification module, respectively, the control end of the switch K1 and the control end of the switch K2 are connected with the audio input end, the control end of the switch K3 is connected with the audio output end.

According to some embodiments of the present invention, the sound channel conversion module employs a chip U2 with model number SGM 48753.

According to the utility model discloses a some embodiments, control module adopts control chip U1, control chip U1 includes synchronous signal end SYNC, input detection end IN-DET and output detection end OUT-DET, synchronous signal end SYNC respectively with the audio input end with the audio output end is connected, input detection end IN-DET and output detection end OUT-DET respectively with the audio input end with the audio output end is connected.

According to some embodiments of the present invention, the control chip U1 further includes a built-in audio decoder and a left channel audio signal output DACL and a right channel audio signal output DACR connected to the audio decoder, respectively, the left channel audio signal output DACL and the right channel audio signal output DACR respectively with the channel conversion module is connected.

According to some embodiments of the utility model, control chip U1 still is connected with at least one among optic fibre input module, FM receiving module, infrared radio frequency module and the USB communication module.

According to some embodiments of the present invention, the control chip U1 is a chip with model AB53 series.

According to some embodiments of the utility model, the audio input with the audio output all adopts the AUX interface.

According to the utility model discloses a sound system of second aspect embodiment, including two foretell stereo sets, one of them the stereo set the audio output with another the stereo set the audio input is connected.

According to the utility model discloses sound system has following beneficial effect at least:

the stereo set combination that two structures are the same is used, can guarantee that left channel and right channel are effective to be separated, reaches the required signal separation degree requirement of high-fidelity stereo set, and simultaneously, the sound channel in the stereo set is changeed the module and is based on the connected mode between audio input end and the audio output between two stereo sets, and the automation of sound channel is paird about realizing, is favorable to simplifying the stereo set product and controls the pairing of sound channel.

According to some embodiments of the utility model, two the stereo set adopts independent power supply power respectively.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic block diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of a single-machine operation state according to an embodiment of the present invention;

fig. 3 is a waveform diagram of an actual measurement signal distortion rate according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a main box in a combined use state according to an embodiment of the present invention;

fig. 5 is a schematic diagram of the auxiliary box in a combined use state according to the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1, the sound disclosed in this embodiment, including control module 1 that connects gradually, sound channel conversion module 2, audio amplification module 3, audio input 4 and audio output 5, control module 1 and sound channel conversion module 2 are equallyd divide and are connected with audio input 4 and audio output 5 respectively, and equally divide and be used for acquireing the detection signal that audio input 4 and audio output 5 are connected with external equipment respectively, control module 1 is used for acquireing the detection signal that audio input 4 and audio output 5 are connected with external equipment respectively promptly, sound channel conversion module 2 is used for acquireing the detection signal that audio input 4 and audio output 5 are connected with external equipment respectively. The control module 1 is further configured to send the decoded audio signal to the sound channel transforming module 2, where the sound channel transforming module 2 is configured to perform sound channel transformation according to the detection signal, and amplify and output the audio signal through the audio amplifying module 3.

The stereo set of this embodiment can use by the stand-alone, also can two combinations use, and whether sound channel transform module 2 is connected with external equipment through detecting audio input 4 and audio output 5 to carry out the automatic transform of sound channel according to detected signal, the pairing of controlling the sound channel need not to set for according to the interface of audio playback source, is favorable to simplifying the left and right sound channel pairing of stereo set, and wherein the external equipment of this embodiment is the stereo set of combination use.

Referring to fig. 2, the audio channel conversion module 2 includes at least three controllable single-pole double-throw switches, the at least three controllable single-pole double-throw switches include a switch K1, a switch K2 and a switch K3, the control module 1 includes a left audio channel audio signal output DACL and a right audio channel audio signal output DACR, the left audio channel audio signal output DACL is connected to the normally open end of the switch K1, the right audio channel audio signal output DACR is connected to the normally open end of the switch K2 and the normally closed end of the switch K3, the dead end of the switch K1 is connected to the normally closed end of the switch K2, the audio input terminal 4, the audio output terminal 5 and the normally open end of the switch K3, the dead end of the switch K2 and the dead end of the switch K3 are connected to the audio amplification module 3, the control end of the switch K1 and the control end of the switch K2 are connected to the audio input terminal 4, and the control end of the switch K3.

Different signal paths are formed according to the switch states of the switch K1, the switch K2 and the switch K3, and the audio signals of the left channel and the right channel are automatically separated.

Referring to fig. 2, the channel conversion module 2 uses a chip U2 with model number SGM 48753. The SGM4875 chip is a CMOS analog integrated circuit and is configured into three single-pole double-throw switches, the requirement of sound channel conversion of sound is met, the SGM4875 chip has the characteristics of low distortion of 0.7%, high isolation of-83 db, low crosstalk of-110 db and the like, and the requirement of high fidelity of sound can be effectively met.

The control module 1 adopts a control chip U1, the control chip U1 comprises a synchronous signal end SYNC, an input detection end IN-DET and an output detection end OUT-DET, the synchronous signal end SYNC is respectively connected with an audio input end 4 and an audio output end 5, the input detection end IN-DET is connected with the audio input end 4, and the output detection end OUT-DET is connected with the audio output end 5. The control chip U1 obtains detection signals of the audio input terminal 4 and the audio output terminal 5 connected to the external device through the input detection terminal IN-DET and the output detection terminal OUT-DET. When the stereo set is used in combination, the control chip U1 obtains the detection signal that the audio output end 5 is connected with the external equipment, and outputs the synchronous signal through the synchronous signal end SYNC, so that the two stereo sets are synchronized.

The control chip U1 further includes a built-in audio decoder, and a left channel audio signal output DACL and a right channel audio signal output DACR connected to the audio decoder, and the left channel audio signal output DACL and the right channel audio signal output DACR are respectively connected to the channel conversion module 2. The left channel audio signal output DACL and the right channel audio signal output DACR are used to output a channel audio signal and a right channel audio output signal, respectively. The control chip U1 decodes the encoded audio signals from the audio playback source through the audio decoder, and outputs the decoded left and right channel audio signals through a left channel audio signal output terminal DACL and a right channel audio signal output terminal DACR, respectively. The control chip U1 of the present embodiment is integrated with an audio decoder, which is beneficial to simplifying the circuit structure.

The control chip U1 still is connected with at least one in optic fibre input module, FM receiving module, infrared radio frequency module and the USB communication module, and the control chip U1 of this embodiment can realize one or more coding audio signal's receiving mode through the receiving module that expands different, is favorable to improving audio signal receiving mode's diversification.

The control chip U1 adopts the chip that the model is AB53 series, it is specific, control chip U1 adopts the chip that the model is AB5303B or AB5301, AB53 series chip embeds has central processing unit, lossless audio decoder, digital signal processor and digital-to-analog converter, can produce synchronizing signal and carry out the decoding of audio signal, can also expand different receiving module, be favorable to simplifying circuit structure, improve circuit design's flexibility.

In this embodiment, the audio input terminal 4 and the audio output terminal 5 both adopt AUX interfaces, and the AUX interfaces are general interfaces, which are convenient for connection with different audio playing sources.

The audio amplification module 3 of the present embodiment may adopt a chip U3 with a model number of AD52060 or TPA3128 to realize amplified output of the audio signal.

The embodiment also discloses a sound system which comprises two sound devices, wherein the audio output end 5 of one sound device is connected with the audio input end 4 of the other sound device.

Two stereo sets that the structure is the same are made up and are used, can guarantee that left channel and right channel are effectively separated, reach the required signal separation degree requirement of high-fidelity stereo set, and simultaneously, sound channel conversion module 2 in the stereo set realizes controlling the automatic pairing of sound channel according to the connected mode between audio input 4 and the audio output 5 between two stereo sets, is favorable to simplifying the pairing of sound product left and right sound channel.

Referring to fig. 3, for hi-fi stereo, signal separation, signal balance, signal distortion, signal-to-noise ratio, etc. all affect the performance of a set of stereo, in order to adapt to different usage scenarios, the stereo system of this embodiment uses two stereo sets with the same structure, and each stereo set uses an independent power supply to supply power, so that the electromagnetic interference of the stereo set can be reduced to the minimum, so as to obtain a better signal-to-noise ratio. The independent power supply can adopt the existing built-in power supply conversion circuit or an external power adapter. In the embodiment, when the input is actually measured at 1KHz/0dB, the distortion degree of the left channel signal is 0.0053%, the distortion degree of the right channel signal is 0.0050%, the distortion degree of the left channel and the distortion degree of the right channel signal are low, and the high signal separation degree is provided, so that the requirement of high-fidelity sound can be met.

For better understanding of the operation principle of the present embodiment, the following detailed description will be made on the operation principles of the stand-alone and the combination of the audio devices.

Referring to fig. 2, when the sound apparatus of the present embodiment is used as a stand-alone sound apparatus, the dead end of the switch K1 is conducted with the normally open end thereof, the dead end of the switch K2 is conducted with the normally closed end thereof, and the dead end of the switch K3 is conducted with the normally closed end thereof. The left channel audio signal is sent out by the left channel audio signal output DACL of chip U1, and through the normal open end of switch K1, the quiet end of switch K1, the normally closed end of switch K2, the quiet end of switch K2 transmits to audio amplification module 3, and the right channel audio signal is sent out by the right channel audio signal output DACR of chip U1, through the normally closed end of switch K3, the quiet end of switch K3 transmits to audio amplification module 3, presents a binaural sound.

Referring to fig. 4 and 5, when the stereo set of the present embodiment is used in combination, the two stereo sets are the main box 10 and the sub-box 20, respectively, and the audio output terminal 5 of the main box 10 is connected to the audio input interface of the sub-box 20 through the AUX audio line of 3.5 mm. The control chip U1 of the main box 10 obtains the detection signal of the audio output terminal 5 connected with the sub-box 20 through the output detection terminal OUT-DET, and the control chip U1 of the main box 10 sends OUT the synchronization signal through the synchronization signal terminal SYNC, so as to realize the synchronization of the main box 10 and the sub-box 20.

Referring to fig. 4, for the main box 10, the dead end of the switch K1 is conducted with its normally open end, the dead end of the switch K2 is conducted with its normally open end, and the dead end of the switch K3 is conducted with its normally closed end. The left channel audio signal is sent out by the left channel audio signal output DACL of the chip U1, and is transmitted to the sub-box 20 through the normally open end of the switch K1, the dead end of the switch K1 and the audio output end 5, the right channel audio signal is sent out by the right channel audio signal output end DACR of the chip U1, and is divided into two paths, wherein one path is transmitted to the audio amplification module 3 through the normally open end of the switch K2 and the dead end of the switch K2, and the other path is transmitted to the audio amplification module 3 through the normally closed end of the switch K3 and the dead end of the switch K3, so that the main box 10 plays the right channel audio signal.

Referring to fig. 5, for the sub-box 20, the dead end of the switch K1 is connected to the normally closed end of the sub-box, the dead end of the switch K2 is connected to the normally closed end of the sub-box, the dead end of the switch K3 is connected to the normally open end of the sub-box, the left channel audio signal is input from the audio input terminal 4 and divided into two paths, one of the two paths is transmitted to the audio amplification module 3 through the normally closed end of the switch K2 and the dead end of the switch K2, and the other path is transmitted to the audio amplification module 3 through the normally open end of the switch K3 and the dead end of the switch K3, so that the sub-box 20 plays the left channel audio signal.

The main box 10 and the auxiliary box 20 of the embodiment can automatically complete the pairing of the left and right sound channels through the connection of the AUX audio line, and the operation is simple and convenient.

The main box 10 of the present embodiment may also send a control signal to the sub-box 20 so as to control the operation of the sub-box 20.

Specifically, when the main box 10 is powered on, the control chip U1 of the main box 10 sends a high level to the sub box 20 through the SYNC signal terminal SYNC, and when the high level received by the sub box 20 is greater than a preset time, the sub box 20 is powered on; when the main box 10 is powered off, the control chip U1 of the main box 10 sends a low level to the sub box 20, and when the low level received by the sub box 20 is greater than a preset time, the sub box 20 is powered off.

When the main box 10 is muted, the control chip U1 of the main box 10 sends a mute control signal to the sub box 20 through the SYNC signal end SYNC, and the sub box 20 is muted synchronously after receiving the mute control signal; when the main box 10 is unmuted, the control chip U1 of the main box 10 transmits a control signal for unmuting, and the sub-box 20 synchronously unmutes after receiving the control signal for unmuting.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. The utility model provides a sound, its characterized in that, including control module (1), sound channel transform module (2), audio amplification module (3), audio input end (4) and audio output (5) that connect gradually, control module (1) with sound channel transform module (2) equally divide respectively with audio input end (4) with audio output (5) are connected, and equally divide and be used for respectively acquireing audio input end (4) with the detected signal that audio output (5) and external equipment are connected, control module (1) still is used for sending the audio signal after decoding for sound channel transform module (2), sound channel transform module (2) are used for the basis the detected signal carries out the sound channel transform, and will the audio signal passes through audio amplification module (3) is enlargied the output.

2. Sound box according to claim 1, characterized in that the channel conversion module (2) comprises at least three controllable single-pole double-throw switches, the at least three controllable single-pole double-throw switches comprising a switch K1, a switch K2 and a switch K3, the control module (1) comprises a left channel audio signal output DACL and a right channel audio signal output DACR, the left channel audio signal output DACL being connected to the normally open end of the switch K1, the right channel audio signal output DACR being connected to the normally open end of the switch K2 and to the normally closed end of the switch K3, respectively, the dead end of the switch K1 being connected to the normally closed end of the switch K2, the audio input (4), the audio output (5) and the normally open end of the switch K3, the dead end of the switch K2 and the dead end of the switch K3 being connected to the audio amplification module (3), respectively, the control end of the switch K1 and the control end of the switch K2 are respectively connected with the audio input end (4), and the control end of the switch K3 is connected with the audio output end (5).

3. Sound as claimed in claim 1 or 2, characterized in that the channel conversion module (2) uses a chip U2 of the type SGM 48753.

4. Sound as claimed IN claim 1, characterized IN that said control module (1) employs a control chip U1, said control chip U1 comprising a synchronization signal terminal SYNC connected to said audio input terminal (4) and said audio output terminal (5), an input detection terminal IN-DET and an output detection terminal OUT-DET, said input detection terminal IN-DET and output detection terminal OUT-DET being connected to said audio input terminal (4) and said audio output terminal (5), respectively.

5. Sound box according to claim 4, characterised in that the control chip U1 further comprises a built-in audio decoder and a left channel audio signal output DACL and a right channel audio signal output DACR connected to the audio decoder, respectively, the left channel audio signal output DACL and the right channel audio signal output DACR being connected to the channel conversion module (2), respectively.

6. The audio device as claimed in claim 4, wherein the control chip U1 is further connected with at least one of a fiber input module, an FM receiving module, an infrared radio frequency module and a USB communication module.

7. Sound equipment as claimed in any one of claims 4-6, characterized in that the control chip U1 is of the AB53 series.

8. Sound box according to claim 1, characterised in that the audio input (4) and the audio output (5) both use an AUX interface.

9. A sound system, comprising two sounds according to any of claims 1-8, wherein the audio output (5) of one of the sounds is connected to the audio input (4) of the other sound.

10. A sound system according to claim 9, characterised in that the two said sounds are each powered by an independent power supply.