KR100656550B1 - The system of wireless speaker by using binary-code division multiple access - Google Patents

Abstract

An intelligent wireless speaker is provided to minimize load in a power amplifier, by comprising a center speaker, a front left speaker, a sub-woofer and a rear right speaker. A B-CDMA(Binary-CDMA)(10) maintains a constant envelope of each external A/V signal of center sound, front left and right sound, low tone sound and rear left and right sound outputted from audio and video of 5.1 channel. A center speaker(20) has the B-CDMA, and receives the center sound. A front left speaker(30) has the B-CDMA, and receives the front left sound. A front right speaker(40) includes the B-CDMA, and receives the front right sound. A sub-woofer(50) has the B-CDMA, and receives the low tone sound. A rear left speaker(60) has the B-CDMA and receives the rear left sound. A rear right speaker(70) has the B-CDMA and receives the rear right sound.

Description

Artificial wireless speaker {THE SYSTEM OF WIRELESS SPEAKER BY USING BINARY-CODE DIVISION MULTIPLE ACCESS}

1 is a block diagram of a conventional wireless speaker system,

Figure 2 is a block diagram showing the components of the artificial intelligence wireless speaker according to the present invention,

Figure 3 is an embodiment showing a center speaker among the components of the artificial intelligence wireless speaker according to the present invention,

Figure 4 is an embodiment showing the front left and right speakers and rear left and right speakers of the components of the artificial intelligence wireless speaker according to the present invention,

Figure 5 is an embodiment showing a display unit of the intelligent wireless speaker according to the present invention according to the present invention,

Figure 6 is an embodiment showing the rear portion of the front left and right speakers and the rear left and right speakers of the component of the intelligent wireless speaker according to the present invention.

** Description of symbols for the main parts of the drawing **

10: B-CDMA 20: Center Speaker

30: Front left speaker 40: Front right speaker

50: Sub-woofer 60: Rear left speaker

70: rear right speaker

The present invention wirelessly delivers an audio signal to a center speaker, front left and right speakers, sub-woofer, rear left and right speakers through a B-CDMA (Binary CDMA) transceiver technique that uses multiple codes and keeps the signal envelope constant. An artificial wireless speaker for reproducing an audio signal of 5.1 channels.

In general, the wireless speaker system of the related art has been increasing in size, increasing the size of television and audio devices, and providing high-definition movie sources such as DVDs.

As the multimedia industry enters the digital era, wireless speakers are becoming more popular as digital broadcasting and DVDs are spreading in accordance with user demand for cleaner and clearer images and more realistic sound effects.

Currently, wireless speaker systems have a total of six speakers properly positioned around the television, producing 5.1-channel sound effects.

The 5.1 channel is the number of channels used to encode Dolby Digital, DTS, and most SDDS film soundtracks, and 5 is the front left and right speakers and the center speaker, and the left and right surround speakers. 1 is dedicated to bass sound effects

Refers to.

However, the television and the speaker are connected by an audio line, which is a limiting factor in the installation space and has an unsatisfactory disadvantage. The conventional wireless speaker system will be described in detail with reference to the accompanying drawings. same.

Fig. 1 is a block diagram of a conventional wireless speaker system, which includes a display means 1 capable of displaying a broadcast signal, a VTR, and an output image of a DVD player; It is composed of six speakers SPK1 to SPK6 connected to the display means 1 by wire to reproduce sound.

In the above configuration, the speakers (SPK1 to SPK6) are the speakers located at the front left and right of the user, the front speakers, the speakers located at the left and right of the rear are the rear speakers, and the center speaker located at the front center of the user of the woofer speaker which reproduces the bass. Can be distinguished.

The front speaker mainly plays music and sound effects, and the center speaker plays human voice.

In addition, the rear speaker plays the effect sound and plays the background sound to enhance the realism.

The front speaker, the center speaker, and the rear speaker are optimized for the location of the user.

The woofer speaker reproduces the bass sound, and its position is not determined, and can be selected and arranged by the user.

Speakers SPK1 to SPK6 implementing the 5.1 channel are connected to the display means 1 of the digital television, PDP, LCD and the like by two audio lines.

However, in such a conventional wireless speaker system, the center speaker or the front speaker may have a short audio line length, but in order to connect the speakers, the audio line length must be long, which causes a positional limitation in the installation and is unfavorable. You have a problem.

In addition, there is a problem that is weak to soft capacity and interference, and the burden on the power amplifier is maximized to overload the system.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has the advantages of B-CDMA, such as robustness against soft capacity and interference through B-CDMA transmission / reception techniques, and minimizes the burden on the power amplifier. The purpose is to provide a wireless speaker consisting of a center speaker, front left and right speakers, sub-woofer, rear left and right speakers.

Artificial intelligence wireless speaker according to the present invention for the above purpose is

B-CDMA (Binary-CDMA), which keeps the envelope of each external A / V signal such as center sound, front left and right sound, bass sound and rear left and right sound output from 5.1 channel audio and video through multiple codes. ,

A center speaker for receiving the center sound provided by the B-CDMA (Binary-CDMA) and wirelessly outputting the center sound to be heard by a user;

A front left speaker provided with the B-CDMA (Binary-CDMA) installed to receive the front left sound wirelessly and to be output by a user;

A front right speaker provided with the B-CDMA (Binary-CDMA) installed to receive the front right sound provided wirelessly and to be output by a user;

A sub-woofer provided with the B-CDMA (Binary-CDMA) and configured to receive the bass sound provided wirelessly and to output it for a user to hear;

A rear left speaker configured to receive the rear left sound provided by the B-CDMA (Binary-CDMA) and to be output by a user; And a rear right speaker provided with the B-CDMA (Binary-CDMA) installed and receiving the rear right sound provided wirelessly and outputting the sound to be heard by a user.

Hereinafter, described in detail with reference to the accompanying drawings of the present invention.

2 is a block diagram of an intelligent wireless speaker according to the present invention, and includes a B-CDMA 10, a center speaker 20, front left and right speakers 30 and 40, a sub-woofer 50, and rear left and right speakers. It consists of (60, 70).

First, B-CDMA will be described.

The B-CDMA 10 is an external input / output device that maintains a constant envelope of each external A / V signal of a center sound, front left and right sounds, a bass sound, and rear left and right sounds corresponding to 5.1 channels through multiple codes. It is installed inside the speaker, front left and right speakers, sub-woofer and rear left and right speakers. In order to keep the envelope of the external A / V signal constant, noise is generated during the truncation of the transmitter to a finite value, and minimizing the noise has a great effect on improving performance. In addition, chip error is caused by additive white noise while an external A / V signal is being transmitted.

In order to accurately analyze the noises, noise generated by truncation may be obtained by approximating Gaussian since the distribution of the multiple code signals follows the Gaussian distribution when the number of codes is large.

In addition, the noise caused by the PSK modulated chip can be approximated to Gaussian after despreading if the spreading factor is large and the autocorrelation property of the code used is good. The above two approximations can theoretically analyze the B-CDMA performance.

Particularly, B-CDMA includes PW-CDMA for converting the size of the truncated signal to the width of the signal, MP-CDMA for converting the phase of the signal, and CS-CDMA for selecting and transmitting a code using a transmission bit. Any one is selected and configured, and the B-CDMA according to the present invention is configured as an MP-CDMA system for converting to an external A / V signal phase.

In addition, a signal summed using multiple codes has a large PAR (peak to average power ratio) and becomes more serious as the number of codes used increases. In this case, the MP-CDMA according to the present invention cuts a signal into a finite value and then PSK modulates the signal. The envelope is constant because the PSK modulated signal differs only in phase. The receiver detects the PSK modulated chip, inverts the phase of the signal to the magnitude of the external signal, and detects the transmitted bit in correlation with the code.

The B-CDMA according to the present invention having such characteristics will be compared with the conventional Bluetooth (Bluetooth) and wireless LAN (Wireless LAN) with Table 1.

Bluetooth Wireless LAN Binary CDMA (B-CDMA) Sound Quality Bad Good (no compression) Good (no compression) Power Consumpation Medium (80mA) Lot (more than 100mA) Low (less than 40mA) Confliction none none has exist Size Big small Big Price usually expensive usually Controllability Bad Bad good

As described above, the 5.1-channel wireless speaker using the B-CDMA according to the present invention has a good effect of minimizing power consumption by reducing the burden of the power amplifier than Bluetooth and WLAN.

By using the characteristics of the B-CDMA to be installed inside the center speaker, front left and right speakers, sub-woofer, rear left and right speakers, it is possible to keep the envelope of the external A / V signal flowing through the multiple codes constant.

Next, the center speaker 20 receives the center sound provided wirelessly from Binary-CDMA (B-CDMA) and outputs the sound so that the user can hear it, which is long in the horizontal direction as shown in FIG. 3. The cover part 41 is formed along the circumference of the cylinder so that a polygonal groove 41-1 is formed on the front surface of the cylindrical shape having a '-' shape, and a B-CDMA (Binary-CDMA) is installed therein. do.

In addition, a first display portion 42 indicating a wireless connection state, an AC power input state, an MP3 connection state, a battery state, and the like is formed side by side on one side of the front left side of the cover part in which the polygonal groove is formed, and the polygonal groove is formed. A second display unit 44 for displaying a sound output state and a sound height is formed on one side of the right front surface of the formed cover part.

Then, a plurality of speakers 43 are formed on one side of the central front surface of the cover portion in which the polygonal groove is formed, and the supporting plate 45 supporting the main body is formed on the bottom surface.

Here, the cover portion 41 is preferably made of aluminum and plastic material, which is light and inexpensive.

The first display unit 42 is composed of an LCD circuit as shown in FIG. 5 and the "antenna" display unit 110 flickers when the wireless connection is performed on an external A / V signal through B-CDMA through a control unit on the circuit. Will work.

When there is no internal rechargeable battery, the AC power supply (AC 18V) is input by connecting an adapter to a connector formed at one side of the rear side, and the “power cord” display unit 120 blinks to operate.

When the portable audio MP3, MP3 phone, wireless transmitter and receiver (Pongle), and portable multimedia player (PMP) are connected in a wired or wireless form, the “MP3” display unit 130 blinks and operates.

In addition, for the convenience of the user, the capacity of the rechargeable battery attached to the inside of the wireless speaker is displayed through the "battery" display unit 140.

Like the first display unit, the second display unit 44 has an LED circuit to display a sound output state and a sound height.

Next, the front left and right speakers 30 and 40 and the rear left and right speakers 60 and 70 are

The B-CDMA (Binary-CDMA) 10 is installed to receive the front left sound and the right sound provided wirelessly for the user to output, or the B-CDMA (Binary-CDMA) is installed wirelessly Receiving the rear left sound and the right sound provided by the user to output the sound,

First, look at the front of the front left and right speakers and the rear left and right speakers,

'자 형상의 원통형으로 이루어져서 전면부에 다각형상의 홈(33-1,43-1,63-1,73-1)이 형성되도록 원통형 둘레를 따라 덮개부(33,43,63,73)가 형성되고, 다각형상의 홈(33-1,43-1,63-1,73-1)이 형성된 덮개부(33,43,63,73)의 상단 헤드부(31,41,61,71)가 수평면으로부터 전면방향으로 10°~ 60°로 기울어져 형성된다.As shown in Figures 4 and 6, the longitudinally long '

The cover portions 33, 43, 63 and 73 are formed along the cylindrical circumference so that the grooves 33-1, 43-1, 63-1 and 73-1 are formed in the shape of a cylindrical shape in the front part. The upper head portions 31, 41, 61, 71 of the cover portions 33, 43, 63, 73, in which the polygonal grooves 33-1, 43-1, 63-1, 73-1 are formed, are horizontal surfaces. It is formed at an inclination from 10 ° to 60 ° in the front direction.

In addition, a B-CDMA (B-CDMA) 10 is installed inside one of the head parts 31, 41, 61, and 71, and a wireless connection state, an AC power input state, and an MP3 connection are provided at the bottom of the head part. Display portions 32, 42, 62, and 72 are provided to indicate the state, battery state, sound output state, sound height, and the like, and polygonal grooves 33-1, 43-1, 63-1, 73-1. A plurality of speakers (34, 44, 64, 74) is formed on one side of the central front surface of the formed cover portion (33, 43, 63, 73), support plates (39, 49, 69, 79) for supporting the body on the bottom surface Is formed.

And, the rear parts 35, 45, 65 and 75 of the front left and right speakers and the rear left and right speakers,

A plurality of wire connecting jacks 36, 46, 66, and 76 are formed on the central side so as to be connected to other devices in a wired manner, and a plurality of rechargeable batteries 37, 47 at the bottom of the wire connecting jacks 36, 46, 66, and 76. , 67, 77 is inserted and connected, the connector for connecting the AC power to the lower support plate (39, 49, 69, 79) of the rechargeable battery (37, 47, 67, 77) ) Is formed and configured.

The wire connection jacks (36, 46, 66, 76) are connected to a portable audio such as MP3, MP3 phone, a wireless transmitter and receiver (Dongle), PMP (Portable multimedia player) or wired with 5.1-channel video and audio devices I can connect it.

As the rechargeable batteries 37, 47, 67, and 77 according to the present invention, a lithium ion (Li-Ion) battery is mainly used, a cell voltage of 3.7 V, and a capacitor capacity of 15 V and 5000 mA are used. It can be small in size, safe by applying protection circuit, low self-discharge, large effective use capacity, and simple configuration of charging circuit.

Finally, the sub-woofer 50 receives the bass provided by the B-CDMA (Binary-CDMA) is installed wirelessly and outputs it so that the user can hear it. The cover part is formed along the cylindrical circumference to form, and the top head part of the cover part in which the polygonal groove is formed is inclined at 10 ° to 60 ° in the front direction from the horizontal plane.

In addition, B-CDMA (Binary-CDMA) is installed inside one side of the head unit, and a wireless connection state, an AC power input state, an MP3 connection state, a battery state, a sound output state, and a sound height are provided at the bottom of the head unit. A display unit for indicating the back is formed, and a woofer is formed at one side of the center front surface of the cover part in which the polygonal groove is formed, and a pedestal for supporting the main body is formed at the bottom.

Hereinafter, a detailed operation process of the artificial intelligence wireless speaker according to the present invention will be described.

First, the center sound, front left and right sounds, bass sound and rear left and right sounds output from 5.1 channel audio and video are simultaneously output.

At this time, the center speaker receives the center sound provided wirelessly through B-CDMA (Binary-CDMA) and outputs the sound for the user to listen to, and indicates the wireless connection state by blinking the "antenna" display of the first display unit. Done. At the same time, the negative output state of the second display is displayed.

In the B-CDMA, PSK modulation is performed by cutting the external A / V signal of the center sound output from 5.1 channel audio and video to a finite value, and the PSK modulated signal has a constant phase, so that the envelope becomes constant. In addition, the receiver detects the PSK modulated chip and inversely converts the signal phase into the magnitude of the external signal, and then transmits the detected bit in correlation with the code so that high quality sound is transmitted.

Subsequently, the front left and right speakers receive the front left and right sounds wirelessly provided through Binary-CDMA (B-CDMA) and output them for the user to hear.

In other words, in B-CDMA (Binary-CDMA) of the front left and right speakers, PSK modulation is performed after cutting external A / V signals of front left and right sound output from 5.1 channel audio and video to a finite value. Since the signal is different in phase only, the envelope becomes constant.The receiver detects the PSK modulated chip, inverts the phase of the signal to the size of the external signal, and detects the transmitted bits in correlation with the code so that high quality sound is transmitted. do.

In addition, the sub-woofer receives a low tone provided wirelessly through Binary-CDMA (B-CDMA) and outputs the sound to be heard by a user.

That is, in B-CDMA (Binary-CDMA) of the sub-woofer, PSK modulation is performed after cutting low-end external A / V signals output from 5.1-channel audio and video to finite values, and the PSK-modulated signals are Since only the phase is different, the envelope becomes constant, and the receiver detects the PSK modulated chip, inverts the phase of the signal to the magnitude of the external signal, and detects the transmitted bits in correlation with the code so that high quality sound is transmitted.

In addition, the rear left and right speakers receive the rear left and right sounds wirelessly provided through Binary-CDMA (B-CDMA) and output them for the user to hear.

That is, in B-CDMA (Binary-CDMA) of the rear left and right speakers, the external A / V signals of the rear left and right sound output from 5.1 channel audio and video are cut into finite values and then PSK modulated. Since the signal is different in phase only, the envelope becomes constant.The receiver detects the PSK modulated chip, inverts the phase of the signal to the size of the external signal, and detects the transmitted bits in correlation with the code so that high quality sound is transmitted. do.

As described above, the 5.1-channel wireless wireless speaker using B-CDMA according to the present invention has the advantages of CDMA, such as soft capacity and robustness to interference, while minimizing the burden on the power amplifier. There is.

Claims (5)

B-CDMA (Binary-CDMA), which keeps the envelope of each external A / V signal such as center sound, front left and right sound, bass sound and rear left and right sound output from 5.1 channel audio and video through multiple codes ( 10) with, A center speaker 20 for receiving the center sound provided by the B-CDMA (Binary-CDMA) and wirelessly outputting the center sound to be heard by a user; A front left speaker (30) which is provided with the B-CDMA (Binary-CDMA) and receives the front left sound provided wirelessly and outputs the sound to be heard by a user; A front right speaker (40) provided with the B-CDMA (Binary-CDMA) installed to receive the front right sound provided wirelessly and to be output by a user; A sub-woofer (50) provided with the B-CDMA (Binary-CDMA) installed to receive the bass sound provided wirelessly and to be output by a user; A rear left speaker (60) configured to receive the rear left sound provided by the B-CDMA (Binary-CDMA) and output the wireless left sound to be heard by a user; And a rear right speaker (70) configured to receive the rear right sound provided by the B-CDMA (Binary-CDMA) and output wirelessly so that the user can listen to the rear right speaker. 2. The B-CDMA (B-CDMA) 10 is composed of an MP-CDMA system, which cuts an external A / V signal into a finite value and PSK modulates the PSK-modulated signal. Since the envelope is constant, the intelligent wireless speaker is configured to detect the PSK modulated chip in the receiver to invert the phase of the signal to the magnitude of the external signal, and then detect the transmitted bits correlated with the code. According to claim 1, the center speaker 20 is made of a cylindrical shape of the '-' shape is elongated in the horizontal direction, the cover portion is formed along the cylindrical circumference to form a polygonal groove on the front, B-CDMA (Binary) therein CDMA) is built-in, and a first display part is formed side by side on the left front side of the cover part in which the polygonal groove is formed, indicating a wireless connection state, an AC power input state, an MP3 connection state, and a battery state. A plurality of speakers are formed on one side of the center front side of the cover part in which the polygonal groove is formed, and a second display part displaying the sound output state and the height of the sound is formed on one side of the right front side of the cover part in which the polygonal groove is formed. Artificial wireless speaker characterized in that the support plate is formed to support the body. 2. The front left and right speakers 30 and 40 and the rear left and right speakers 60 and 70 are long in the longitudinal direction.

'The cover is formed along the cylindrical circumference so that the polygonal groove is formed on the front surface by the cylindrical shape, and the upper head portion of the cover portion on which the polygonal groove is formed is inclined at 10 ° to 60 ° in the front direction from the horizontal plane. B-CDMA (Binary-CDMA) is installed inside one side of the head part, and wireless connection state, AC power input state, MP3 connection state, battery state, negative output state and sound height The display unit is formed, a plurality of speakers are formed on one side of the center front surface of the cover portion formed with a polygonal groove, the support plate for supporting the main body is formed on the bottom surface; A plurality of wire connecting jacks are formed on the central side of the rear part so as to be connected with other devices by wire, a plurality of rechargeable batteries are inserted and connected to the bottom of the wire connecting jacks, and an AC power connector is formed on the lower support plate of the rechargeable battery. Intelligent wireless speaker characterized in that it is. According to claim 1, wherein the sub-woofer 50 is formed in a cylindrical shape so that the cover portion is formed along the cylindrical circumference so as to form a polygonal groove on the front surface, the top head portion of the cover portion in which the polygonal groove is formed in the front direction from the horizontal plane 10 It is formed to be inclined at ~ 60 °, B-CDMA (Binary-CDMA) is installed inside one side of the head portion, and the wireless connection state, AC power input state, MP3 connection state, battery state, An artificial intelligence wireless speaker, characterized in that the display unit for indicating the sound output state and the height of the sound is formed, a woofer is formed on one side of the central front surface of the cover portion formed with a polygonal groove, and a pedestal for supporting the body on the bottom surface is formed. .

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