CN1392750A - Sound system using wireless speakers - Google Patents

Abstract

The present invention relates to a sound system using a wireless speaker, including: a host computer for generating a voice data; an amplifier for receiving the sound data and performing a signal processing operation on the sound data to generate an electromagnetic wave carrying the sound data; and a wireless speaker assembly, comprising a plurality of wireless speakers, each wireless speaker including a sound data receiving antenna, a sound data receiver, and a speaker, wherein the sound data receiving antenna receives the electromagnetic wave, and the sound data receiver is used to restore the sound data carried by the electromagnetic wave to generate an analog sound data to be transmitted to the speaker, thereby driving the speaker to generate sound.

Description

Sound system using wireless speakers

technical field

The present invention relates to audio systems, and more particularly to an audio system using wireless speakers.

Background technique

With the development and progress of science and technology, people's requirements for the quality of life are relatively higher and higher. Listening to music has gradually become one of the interests and activities that ordinary people like. In order to be able to listen to the music you like at any time, the audio system has almost become a must-have electrical appliance for every family. As people have higher and higher requirements for the quality of music and the convenience of music, the access method of sound data has gradually evolved from the early turntables and tapes to the most common laser turntable. In addition, the speakers in the audio system have become more and more complex after long-term development and improvement. Of course, the quality of the sound they emit has also made great progress.

Please refer to Figure 1, which shows a common basic audio structure. In this basic audio structure, comprise a main frame 100, comprise a radio (Radio) 105, a player (Player) 110, a radio antenna (Radio Antenna) 115 and speaker (Speaker) 120 in this main frame. Among them, the radio 105 utilizes the radio antenna 115 to receive the electromagnetic waves transmitted in the space in frequency modulation (FM) or amplitude modulation (AM) into the radio 105, and then convert them into sound data through a special modulation technology, and transmit them to the speaker 120 to emit sound . Alternatively, the player 110 transmits the audio data stored on the tape or disc to the speaker 120, and can also emit audio.

With the advancement of technology and the improvement of the quality of life, the general public has higher and higher requirements for the sound quality of the audio system. As shown in Figure 1, the sound quality of the common basic audio system can no longer meet the needs of the general public. In order to improve the common audio The sound quality of the system and the design of the speakers are becoming more and more complicated, and the number of speakers used and the placement of each speaker are getting more and more attention. Therefore, the common basic audio system as shown in FIG. 1 slowly evolves to the audio system using wired speakers as shown in FIGS. 2 and 3 .

Please refer to Fig. 2, this audio system that uses wired speaker includes a main frame 200, a loudspeaker (Speaker) combination 220 and sound signal transmission line (Signal Line) 225, and this main frame 200 comprises a player (Player) 210, a radio ( Radio) 205, a radio antenna (RadioAntenna) 215 and an amplifier (Amplifying unit) 230, the speaker combination 220 includes several speakers. The radio 205 uses the radio antenna 215 to receive FM or AM electromagnetic waves transmitted in space into the radio 205, and then converts them into sound data and transmits them to the amplifier 230 through special modulation technology. Alternatively, the player 210 transmits audio data stored on a tape or disc to the amplifier 230 . The sound data in the amplifier 230 undergoes a special signal processing program to enhance the quality of the sound data, and then the processed sound data is transmitted to the speaker combination 220 through the sound signal transmission line 225 to emit sound.

Please refer to FIG. 3 , the audio system using wired speakers includes a host 300, an amplifier (Amplifier) 330, a speaker (Speaker) combination 320 and a sound signal transmission line (SignalLine) 325, and the host 300 includes a player ( Player) 310, a radio (Radio) 305 and a radio antenna (Radio Antenna) 315, the speaker combination 220 includes several speakers. The radio 305 uses the radio antenna 315 to receive FM or AM electromagnetic waves transmitted in the space into the radio 305, and then converts them into sound data and transmits them to the amplifier 330 through special modulation technology. Furthermore, the player 310 transmits the audio data stored on the tape or disc to the amplifier 330 . The audio data in the amplifier 330 undergoes a special signal processing procedure to enhance the quality of the audio data, and then the processed audio data is transmitted to the speaker combination 320 through the audio signal transmission line 325 to emit sound.

In order to improve the quality of the sound data and make the sound data more varied, the audio system using wired speakers as shown in Figure 2 and Figure 3 respectively adds an amplifier and an amplifier that can perform special signal processing procedures on the sound data. In addition, in order to improve the sound quality of the audio system, the number of speakers used in the speaker combination and the placement of each speaker must also be considered. Therefore, in order to place each speaker at a specific position, the processed sound data must pass through the sound signal transmission line, and the processed sound data is transmitted from the amplifier or the amplifier to each speaker, which will inevitably use multiple lengthy sound channels. The signal transmission line will therefore cause various problems and inconveniences in the handling, assembly and erection of the audio system using wired speakers, and the multiple sound signal transmission lines used will also cause a lot of trouble and unsightly.

In view of the above-mentioned background of the invention, the audio system using wired speakers will face various problems and inconveniences in handling, assembling and erecting, and the multiple audio signal transmission lines used will also cause many troubles and unsightly. Therefore, the present invention provides an audio system using wireless speakers to address the above needs.

Contents of the invention

The purpose of the present invention is to provide an audio system using wireless speakers, which can effectively avoid the use of multiple lengthy sound signal transmission lines between the amplifier and the speaker, and effectively solve the problem of handling and assembling the audio system using wired speakers. The various problems often encountered in the erection, and the many troubles and unsightlyness caused by the use of multiple lengthy sound signal transmission lines.

The purpose of the present invention is achieved like this:

The invention discloses an audio system using a wireless loudspeaker, comprising: the host is used to provide sound data, and the host includes at least a radio or a player; an amplifier is used to receive the sound data and perform signal processing to generate a The processed sound data, wherein the amplifier also includes a sound data transmitter and a sound data transmitting antenna, the sound data transmitter mixes the processed sound data into a radio frequency signal and the radio frequency signal is emitted by the sound data transmitting antenna to become an electromagnetic wave; and a wireless speaker A combination comprising a plurality of wireless speakers, each of which includes a sound data receiving antenna, a sound data receiver, and a speaker, wherein the sound data receiving antenna receives electromagnetic waves, and the sound data receiver is used to restore electromagnetic waves to radio frequency signals and generate analog sounds Data is used to send to the speaker.

The present invention also discloses an audio system using a wireless speaker, including: a host computer that generates sound data; an amplifier that receives the sound data and performs a signal processing operation on the sound data to generate a Electromagnetic waves of sound data; and a wireless speaker combination, including a plurality of wireless speakers, each of which includes a sound data receiving antenna, a sound data receiver, and a speaker, wherein the sound data receiving antenna receives the electromagnetic wave, the The sound data receiver is used to restore the sound data carried by the electromagnetic wave to generate an analog sound data and send it to the speaker, and then push the speaker to produce sound.

According to the idea above, in the audio system using wireless speakers according to the present invention, the amplifying machine includes a sound data transmitter and a sound data transmitting antenna, and the sound data transmitter mixes the sound data into a radio frequency signal and transmits it by The audio data transmitting antenna transmits the radio frequency signal to become the electromagnetic wave carrying the audio data.

According to the idea above, in the audio system using wireless speakers according to the present invention, the sound data transmitter includes: a local oscillator for generating a harmonic signal; a ninety-degree phase shifter for The phase shift of the harmonic signal is 90 degrees; a first mixer is used for mixing a first fundamental frequency signal and the harmonic signal; a second mixer is used for mixing a second fundamental frequency signal and the harmonic signal The harmonic signal with a phase shift of ninety degrees; an adder used to add the outputs of the first mixer and the second mixer; and a power amplifier used to amplify the output of the adder.

According to the above idea, the audio system using wireless speakers according to the present invention, wherein the audio data receiver includes: a low-frequency noise amplifier for amplifying the radio frequency signal received by the audio data transmitting antenna; a local oscillator , for generating a harmonic signal; a ninety-degree phase shifter, for shifting the phase of the harmonic signal by ninety degrees; a first mixer, for mixing the radio frequency signal and the harmonic signal; and a second mixer for mixing the radio frequency signal and the harmonic signal with a phase shift of 90 degrees.

According to the idea above, in the audio system using wireless speakers of the present invention, the host includes at least one of a radio and a player.

The preferred embodiments of the present invention will be described in more detail with the following figures in the following descriptive texts.

Description of drawings

Figure 1 is a structural diagram of a common basic audio system;

Fig. 2 is a kind of sound system structural diagram using wired speaker;

Fig. 3 is another kind of sound system structural diagram that uses wired loudspeaker;

Fig. 4 is a kind of sound system structural diagram using wireless loudspeaker;

Figure 5 is the constellation diagram (Constellation) of Quadrature Phase Shift Keying (QPSK for short);

Fig. 6 is a radio frequency circuit structure diagram of a voice data transmitter; and,

Fig. 7 is a structure diagram of a radio frequency circuit of a sound data receiver.

Description of figure number:

100 host 105 radio

110 player 115 radio antenna

120 speakers 200 hosts

205 radio 210 player

215 radio antenna 220 speaker combination

225 sound signal transmission line 230 amplifier

300 host 305 radio

310 player 315 radio antenna

320 speaker combination 325 sound signal transmission line

330 expansion machine 400 host

405 radio 410 player

415 radio antenna 420 wireless speaker combination

425 speakers

430 Amplifier 435 Sound Data Transmitter

440 sound data transmitting antenna 445 sound data receiver

450 sound data receiving antenna 605 mixer

610 Addition Circuit 615 Power Amplifier

620 sound data transmitting antenna 625 local oscillator

630 ninety degree phase shifter 705 mixer

715 Low Noise Amplifier 720 Sound Data Receiving Antenna

725 Local Oscillator 730 Ninety Degree Phase Shifter

Detailed ways

Since the audio system using wired speakers will need to use multiple lengthy sound data transmission lines, it will encounter various problems and inconveniences in handling, assembly and erection, and the multiple sound signal transmission lines used will also cause a lot of trouble and unsightly. Therefore, the present invention provides an audio system using wireless speakers to address the above needs.

As shown in Figure 4 for an embodiment of this invention, please refer to Figure 4, the audio system using wireless speakers includes a host 400, an amplifier (Amplifier) 430 and a wireless speaker (Speaker) combination 420, in the host Including a player (Player) 410, a radio (Radio) 405 and a radio antenna (Radio Antenna) 415, the amplifier further includes a voice data transmitter (Transmitter) 435 and a voice data transmission antenna (Transmit Antenna) 440 , the wireless speaker assembly 420 includes several wireless speakers, and each wireless speaker further includes a speaker 425 , a sound data receiver (Receiver) 445 and a sound data receiving antenna (Receive Antenna) 450 .

The radio 405 uses the radio antenna 415 to receive FM or AM electromagnetic waves transmitted in the space into the radio 405, and then converts them into sound data and transmits them to the amplifier 430 through special modulation technology. Alternatively, the player 410 transmits audio data stored on tape or disc to the amplifier 430 . The sound data is processed in the amplifier 430 by a special signal processing program to enhance the quality of the sound data, and the processed sound data passes through the sound data transmitter 435 to up-convert the sound data into radio frequency (Radio Frequency). Signal.

In this embodiment, the sound data processed by the amplifier 430 is a digital signal, so the up-frequency modulation technology in the sound data transmitter 435 selects Quadrature Phase Shift Keying (Quadrature Phase Shift Keying, referred to as QPSK) digital modulation (Digital Modulation), this modulation technology uses the phase (Phase) of the radio frequency signal to transmit each byte (bit), as shown in Figure 5, when the phase is forty-five degrees, it represents "00", when the phase is one One hundred and thirty-five degrees represents "01", when the phase is two hundred and twenty-five degrees, it represents "11", and when the phase is three hundred and fifteen degrees, it represents "10".

The RF circuit architecture of the sound data transmitter is shown in Figure 6. A simpler direct-conversion (Direct-Conversion) architecture is selected. This architecture can directly mix the baseband (Base Band) signal only once. Up-converted into a radio frequency signal. Please refer to Fig. 6. The local oscillator (Local Oscillator, referred to as L0) 625 in Fig. 6 emits a harmonic signal (Sinusoidal Signal) with a frequency of radio frequency, which respectively combines the two fundamental frequency I signals used to transmit the phase with the The fundamental frequency Q signal is mixed with the harmonic signals sent by the local oscillator by a mixer (mixer) 605, and one of the harmonic signals must pass through a 90-degree phase shifter (90 Degrees Phase Shifter) before entering the mixer. ) 630 adjusts the phase by ninety degrees. Next, the two up-modulated signals are added by an adder 610 to form a radio frequency signal, and the radio frequency signal must pass through a power amplifier (Power Amplifier, referred to as PA.) 615 to increase the strength of the signal. Finally, the radio frequency signal is transmitted into space by the voice data transmission antenna 620 to become an electromagnetic wave.

Please refer to Fig. 4, on the other hand, the sound data receiving antenna 450 of each wireless speaker in the wireless speaker combination 420 instantly receives the electromagnetic wave emitted by the sound data transmitting antenna 440 into the sound data receiver (Receiver) 445 and becomes a radio frequency. Signal. The structure of the radio frequency circuit of the sound data receiver is shown in Figure 7, and a relatively simple direct conversion structure is also selected. This structure can directly convert the radio frequency signal to the base for demodulation (Demodulation) after only one mixing (mix). frequency signal. Please refer to Fig. 7, since the radio frequency signal received by the sound data receiving antenna 720 is very weak, it must pass through a low noise amplifier (Low Noise Amplifier, referred to as LNA.) 715 to amplify the radio frequency signal, and then, the amplified radio frequency The signal is equally divided into two signals and enters the mixer 705 respectively. The local oscillator 725 emits a harmonic signal (Sinusoidal Signal) with a frequency of radio frequency, and the two amplified radio frequency signals are mixed with the harmonic signal sent by the mixer (mixer) 725 and the local oscillator 725 respectively, and wherein Before a harmonic signal enters the mixer, the phase must be adjusted by 90 degrees through a 90-degree phase shifter (90 Degrees PhaseShifter). The RF signal and the harmonic signal must be in phase when entering the mixer. , so that the harmonic signal components in the radio frequency signal can be completely removed to obtain the fundamental frequency I signal and the fundamental frequency Q signal respectively.

Please refer to Fig. 4, after the original sound data is obtained by the sound data receiver 445, the sound data in the form of digital (Digital) must also be converted into sound data in the form of analog (Analog) that can drive the speaker 425, and sent to the speaker The 425 makes a sound.

Utilizing the present invention can effectively avoid the use of multiple redundant sound signal transmission lines between the amplifier and the speaker, and effectively solve various problems often encountered in the handling, assembly and erection of the audio system using wired speakers. A lot of confusion and unsightlyness caused by the use of multiple lengthy audio signal transmission lines.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All other equivalent changes or modifications that do not deviate from the spirit disclosed in the present invention should be included in the patent. within the scope of protection.

Claims (10)

1. a sound system that uses wireless speaker is characterized in that, comprising:

One main frame, this main frame be in order to providing a voice data, and this main frame comprises at least, a broadcast receiver and a player one of them;

One enlarger is in order to receive this voice data, and make a signal processing and move, in order to produce a voice data of handling, wherein this enlarger also comprises voice data emission device and voice data emission antenna, and the voice data that voice data emission device will be handled is mixed down a radiofrequency signal and launches this radiofrequency signal by this voice data emission antenna becomes an electromagnetic wave; And

The combination of one wireless speaker, comprise a plurality of wireless speakers, each this wireless speaker comprises a voice data reception antenna, one voice data receiver, with a loud speaker, wherein this voice data reception antenna receives this electromagnetic wave, and this voice data receiver is in order to be reduced into this electromagnetic wave this radiofrequency signal and to produce an analog voice data in order to be sent to this loud speaker.

2. the sound system of use wireless speaker as claimed in claim 1 is characterized in that, the voice data of this processing is a digital signal.

3. the sound system of use wireless speaker as claimed in claim 2 is characterized in that, this digital signal is utilized the digital modulation of a quaternary phase shift key (QPSK), produces this radiofrequency signal.

4. the sound system of use wireless speaker as claimed in claim 1 is characterized in that, this voice data emission device comprises:

One local oscillator is in order to produce a harmonic signal;

One or nine ten degree phase shifters are in order to spend this harmonic signal phase shift 90;

One first frequency mixer is in order to mixing one first fundamental frequency signal and this harmonic signal;

One second frequency mixer is in order to the harmonic signal of mixing one second fundamental frequency signal and this phase shift 90 degree;

One adder is in order to the output addition with this first frequency mixer and this second frequency mixer; And

One power amplifier is in order to amplify the output of this adder.

5. the sound system of use wireless speaker as claimed in claim 1 is characterized in that, this voice data receiver comprises:

One low-frequency noise amplifier will be in order to being amplified by this voice data emission this radiofrequency signal that antenna received;

One local oscillator is in order to produce a harmonic signal;

One or nine ten degree phase shifters are in order to spend this harmonic signal phase shift 90;

One first frequency mixer is in order to this radiofrequency signal of mixing and this harmonic signal; And

One second frequency mixer is in order to the harmonic signal of this radiofrequency signal of mixing and this phase shift 90 degree.

6. a sound system that uses wireless speaker is characterized in that, comprising:

One main frame produces a voice data;

One enlarger in order to receiving this voice data, and is done signal processing action and then is produced an electromagnetic wave that is loaded with this voice data this voice data; And

The combination of one wireless speaker, comprise a plurality of wireless speakers, each this wireless speaker comprises a voice data reception antenna, one voice data receiver, with a loud speaker, wherein this voice data reception antenna receives this electromagnetic wave, and this voice data receiver produces an analog voice data in order to this voice data reduction that this electromagnetic wave is contained and is sent to this loud speaker, and then promotes this loud speaker sounding.

7. the sound system of use wireless speaker as claimed in claim 6, it is characterized in that, this enlarger comprises voice data emission device and voice data emission antenna, and this voice data emission device is mixed down this voice data one radiofrequency signal and launches this radiofrequency signal by this voice data emission antenna becomes the electromagnetic wave that this is loaded with this voice data.

8. the sound system of use wireless speaker as claimed in claim 7 is characterized in that, this voice data emission device comprises:

One local oscillator is in order to produce a harmonic signal;

One or nine ten degree phase shifters are in order to spend this harmonic signal phase shift 90;

One first frequency mixer is in order to mixing one first fundamental frequency signal and this harmonic signal;

One second frequency mixer is in order to the harmonic signal of mixing one second fundamental frequency signal and this phase shift 90 degree;

One adder is in order to the output addition with this first frequency mixer and this second frequency mixer; And

One power amplifier is in order to amplify the output of this adder.

9. the sound system of use wireless speaker as claimed in claim 6 is characterized in that, this voice data receiver comprises:

One low-frequency noise amplifier will be in order to being amplified by this voice data emission this radiofrequency signal that antenna received;

One local oscillator is in order to produce a harmonic signal;

One or nine ten degree phase shifters are in order to spend this harmonic signal phase shift 90;

One first frequency mixer is in order to this radiofrequency signal of mixing and this harmonic signal; And

One second frequency mixer is in order to the harmonic signal of this radiofrequency signal of mixing and this phase shift 90 degree.

10. the sound system of use wireless speaker as claimed in claim 6 is characterized in that, this main frame comprise at least a broadcast receiver and a player one of them.

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