CN104347093B - Music playing system - Google Patents

Abstract

The present invention discloses a music playing system, comprising a handheld device and a digital audio system. The handheld device converts control information into a pulse signal, and controls the on/off state of a visible light emitting element with the pulse signal to transmit a visible light signal. The digital audio system receives the visible light signal through a light sensor and restores the visible light signal to control information. After receiving the control information, the digital audio system performs corresponding control actions. The present invention can quickly and conveniently control the digital audio system to perform corresponding control actions.

Description

music playback system

technical field

The invention relates to a music playing system, in particular to a music playing system with a handheld device and a digital sound system.

Background technique

Generally, the control of digital audio mainly depends on the control panel or remote control, and the control that can be performed by the control panel or remote control is usually relatively basic and has no room for personalization. With the development of science and technology, existing handheld devices, such as smart phones, tablet computers, etc., have complete functions, and the control they can perform is very rich and has room for personalization. The use of handheld devices to control digital audio has become a major research topic.

At present, the handheld device mainly uses wireless communication to communicate with the digital audio to control the digital audio. The wireless communication methods commonly used in handheld devices include Wi-Fi, Bluetooth, and near-field communication, etc., all of which require an additional corresponding chip in the handheld device and digital audio, which is not only expensive, but also inconvenient to operate, such as Bluetooth When pairing, the user needs to enter the same password on both devices. Moreover, these communication methods all belong to radio frequency communication, and the electromagnetic radiation generated by them is not good for human health and has the problem of electromagnetic radiation channel occupation.

Therefore, there is a need for an improved communication and control method between a handheld device and a digital audio system, so as to improve the aforementioned wireless communication problems and provide rich personalized control behaviors.

Contents of the invention

The main purpose of the present invention is to provide a music playing system that uses visible light to transmit control information to a digital audio system using a handheld device.

The main purpose of the present invention is to provide a kind of music playing system, comprising:

A handheld device, including a first sender controller, wherein the first sender controller includes:

a first visible light emitting element; and

A first light signal generator, used to convert a control information into a first pulse signal and use the first pulse signal to control the on-off state of the first visible light emitting element to send out a first visible light signal; and

A digital audio system includes a host and a speaker for playing a digital music file, and the digital audio system also includes a first receiver controller, wherein the first receiver controller includes:

a first light sensor, used to sense the on-off state of the first visible light emitting element to receive the first visible light signal; and

a first light signal interpreter, used to restore the first visible light signal to control information;

Wherein, after the digital audio system receives the control information, the digital audio system executes a corresponding control action according to the control information.

The main purpose of the present invention is to provide a kind of music playing system, comprising:

A handheld device, including a first sender controller, wherein the first sender controller includes:

a first visible light emitting element; and

A first light signal generator, used to convert a control information into corresponding at least one color light and control the first visible light emitting element to emit corresponding at least one color light to send out a first visible light signal; and

A digital audio system includes a host and a speaker for playing a digital music file, and the digital audio system also includes a first receiver controller, wherein the first receiver controller includes:

a first light sensor for sensing at least one corresponding color light to receive a first visible light signal; and

a first light signal interpreter, used to restore the first visible light signal to control information;

Wherein, after the digital audio system receives the control information, the digital audio system executes a corresponding control action according to the control information.

The beneficial effect of the present invention is that the music playing system of the present invention uses the visible light emitting element and the light sensor to complete the control information transmission between the handheld device and the digital audio system, and uses the transmission of the handheld device identification code to perform personalized control behavior. Therefore, the music playing system of the present invention not only solves the aforementioned problems of wireless communication, but also can make good use of the basic components of the handheld device to extend and change its application, and can quickly and conveniently control the digital audio to perform corresponding control behaviors, especially personalized control behavior. In addition, the music playing system of the present invention can also complete the pairing between the handheld device and the digital audio system through visible light communication, so as to solve the problem of complicated operation and error-prone when pairing through wireless communication.

Description of drawings

FIG. 1 is a device diagram of a music playing system according to a first embodiment of the present invention.

Fig. 2 is a block diagram of a music playback system according to a first embodiment of the present invention.

FIG. 3 is a schematic diagram of the user interface of the music playback system according to the first embodiment of the present invention.

FIG. 4 is a signal schematic diagram of the music playing system according to the first embodiment of the present invention.

Fig. 5 is a block diagram of a music playback system according to a second embodiment of the present invention.

Fig. 6 is a schematic diagram of encoding rules of the music playing system according to the second embodiment of the present invention.

Fig. 7 is a block diagram of a music playback system according to a third embodiment of the present invention.

FIG. 8 is a signal schematic diagram of a music playing system according to a third embodiment of the present invention.

Fig. 9 is a schematic diagram of encoding rules of the music playing system according to the third embodiment of the present invention.

FIG. 10 is a device diagram of a music playing system according to a fourth embodiment of the present invention.

Fig. 11 is a block diagram of a music playback system according to a fourth embodiment of the present invention.

FIG. 12 is a schematic diagram of the user interface of the music playing system according to the fourth embodiment of the present invention.

Wherein, the reference signs are explained as follows:

Music player system 1

Handheld Devices 11

The first sending end controller 110

The first visible light emitting element 111

First optical signal generator 112

first encoder 1121

first light modulator 1122

User Interface 113

The first play control instruction 1131

The second play control instruction 1132

The third play control instruction 1133

The fourth play control instruction 1134

command receiver 114

Digital Audio 12

The first receiving end controller 120

Host 121

First light sensor 1211

Speaker 122

First optical signal interpreter 123

The first pre-processor 1231

The first optical demodulator 1232

First information interpreter 1233

Control informationX

Binary instruction code A

Binary instruction code A1

Binary instruction code A2

The first pulse signal B

Play control command signal B1

Handheld device identification signal B2

start signal B3

Termination signal B4

Interval signal B5

The first visible light signal P

Music playback system 1A

Handheld 11A

The first sending end controller 110A

First visible light emitting element 111A First optical signal generator 112A

First Encoder 1121A

First light modulator 1122A

command receiver 114A

Digital audio 12A

The first receiving end controller 120A

First light sensor 1211A

First Optical Signal Interpreter 123A

The first pre-processor 1231A

First Optical Demodulator 1232A

First Information Interpreter 1233A

The first visible light signal PA

Music player system 1B

Handheld 11B

The first sending end controller 110B

The first visible light emitting element 111B

The first optical signal generator 112B

first encoder 1121B

First light modulator 1122B

command receiver 114B

Digital Audio 12B

The first receiving end controller 120B

First light sensor 1211B

First optical signal interpreter 123B

The first pre-processor 1231B

First Optical Demodulator 1232B

First information interpreter 1233B

The first pulse signal BX

Play control command signal B1X

Handheld device identification signal B2X

The first visible light signal PB

lowest bit d0

next low bit d1

second highest bit d2

highest bit d3

Voltage strength V, V0～V7

High potential signal H

Music playback system 2

Handheld Devices 21

The first visible light emitting element 210

Second light sensor 211

First optical signal generator 212

first encoder 2120

first light modulator 2121

Ambient Light Sensor 213

Second optical signal interpreter 214

The second pre-processor 2141

Second optical demodulator 2142

Second information interpreter 2143

The first sending end controller 215

The second receiver controller 216

User Interface 217

Pairing Options 2171

command receiver 218

Digital Audio 22

The second visible light emitting element 220

first light sensor 221

First optical signal interpreter 222

The first pre-processor 2220

The first optical demodulator 2221

First information interpreter 2222

Indicator light 223

Second optical signal generator 224

Second encoder 2241

Second light modulator 2242

The first receiving end controller 225

The second sending end controller 226

command receiver 227

The first visible light signal Q

The second visible light signal R

detailed description

The invention provides a music playing system which can solve the problems of the prior art. First, the composition of the music playback system 1 of this example will be described. Please refer to FIG. 1 at the same time. FIG. 1 is a device diagram of the music playing system of this example. FIG. 1 shows a handheld device 11 and a digital speaker 12 of a music playing system 1 .

In this example, the handheld device 11 is a smart phone or a tablet computer, wherein the smart phone or the tablet computer can be equipped with operating systems such as Android, iOS, BlackBerry OS, Windows Mobile, Windows Phone, bada OS, Symbian OS, But it is not limited thereto, and the handheld device 11 can also be a smart phone or a tablet computer equipped with other operating systems.

Digital audio system 12 then has the ability to play digital music files. So-called digital music refers to digitized audio content, such as WMA (Windows Media Audio), MP3 (MPEG Audio Layer3), WAV (Waveform audioformat), AAC (Advanced audio coding) The files of other formats are all digital music files, but not limited thereto, the digital audio system 12 can also play digital music files of other formats.

The handheld device 11 includes a first visible light emitting element 111. In this example, the first visible light emitting element 111 is a screen capable of emitting light, such as a SUPER AMOLED screen, an AMOLED screen, a TFT-LCD screen, and the like. In addition, in other embodiments, the first visible light emitting element 111 may also be a flashlight of the camera of the handheld device 11 , wherein the flashlight is located on the back of the handheld device 11 , and the flashlight may be a light emitting diode or other light emitting elements.

Furthermore, the digital audio system 12 includes a host 121, a speaker 122, and a first light sensor 1211 disposed on the host 121. In this example, the first light sensor 1211 can be a photoresistor, a photodiode, a phototransistor, a two-dimensional light sensor, etc. . It should be noted that the digital audio system 12 of the present invention is not limited to the audio system in which the host 121 and the speaker 122 are separated, for example, a single-box audio system, that is, the audio system in which the host 121 and the speaker 122 are integrated is also within the scope of the present invention.

The music playing system 1 of this example senses a visible light signal transmitted by the first visible light emitting element 111 of the handheld device 11 through the first light sensor 1211 of the digital audio system 12, analyzes the control information transmitted by the handheld device 11, and executes according to the control information. A corresponding control action will be further described below.

The operation situation of the present invention is described next, please refer to Fig. 1 to Fig. 4 simultaneously, Fig. 2 is the block diagram of the music playing system of this example, Fig. 3 is the user interface schematic diagram of the music playing system of this example, Fig. 4 is this example Signal schematic diagram of the music playing system.

As shown in FIG. 2 , the handheld device 11 includes a first transmitter controller 110 whose purpose is to convert control information into a visible light signal. The first sending end controller 110 includes a first visible light emitting element 111 , a first light signal generator 112 and a command receiver 114 . The first optical signal generator 112 includes a first encoder 1121 and a first optical modulator 1122 . The digital audio system 12 includes a first receiver controller 120, whose purpose is to restore the visible light signal to control information, wherein the first receiver controller 120 includes a first light sensor 1211 and a first light signal interpreter 123, the first light The signal interpreter 123 includes a first pre-processor 1231 , a first optical demodulator 1232 and a first information interpreter 1233 .

First, when the user wants to use the handheld device 11 to control the digital audio system 12, the user can click on the handheld device 11 and open an application program (APP). Installed in the handheld device 11 after downloading.

After starting the application program, a user interface 113 (User Interface, UI) will be displayed on the screen (the first visible light emitting element 111). As shown in FIG. Four play control instructions 1134, in this example the first play control instruction 1131 is "start playing from the previous pause", the second play control instruction 1132 is "random play", and the third play control instruction 1133 is "play the first song list", the fourth play control instruction 1134 is "create a list of songs", but it is not limited thereto. Please note that what is shown in the figure is for illustrative purposes only, and is not intended to limit the form of the user interface 113 in this example and the playback control commands it has.

It should be noted that each playback control instruction has its corresponding binary instruction code, which is preset and can be recognized and executed by the digital audio system 12 . For example, in this example, the binary instruction code corresponding to the first playback control instruction 1131 is 11011110, the binary instruction code corresponding to the second playback control instruction 1132 is 01010010, and the binary instruction code corresponding to the third playback control instruction 1133 is 11011101, and the binary instruction code corresponding to the fourth playback control instruction 1134 is 00001111, but not limited thereto.

Then the user can select one or more playback control commands in the user interface 113. If the user selects the first playback control command 1131, that is, after the previous pause and confirmation of execution, the command receiver 114 will confirm The binary command code A corresponding to the control information X generated when the first playback control command 1131 is selected is sent to the first encoder 1121, and the handheld device 11 will display a prompt message on the user interface 113 to remind the user to turn the screen (No. A visible light emitting element 111) turns to the first light sensor 1211 close to the digital audio system 12 to send the control information X. When the digital audio system 12 emits a response sound, it means that the transmission of the control information X is completed, and the user can move the handheld device 11 away.

It should be noted that a digital audio system 12 may be used with many handheld devices. In order to perform control behaviors that conform to specific handheld devices, that is, personalized control behaviors, the digital audio system 12 needs to know which handheld device the control information X is from. Therefore, in this example, the control information X will include the first playback control command 1131 and the handheld device identification code of the handheld device 11, so the command receiver 114 transmits the binary command code A1 corresponding to the first playback control command 1131 to the second In addition to the first encoder 1121 , the binary instruction code A2 corresponding to the handheld device identification code of the handheld device 11 needs to be transmitted to the first encoder 1121 .

In this example, the handheld device identification code can be a name set by the user, such as the code "D", but it is not limited thereto. The handheld device identification code can also be the International Mobile Equipment Identity (International MobileEquipment Identity) of the handheld device 11. , IMEI) code or Media Access Control (Media Access Control, MAC) address, etc. As shown in FIG. 4 , in this example, the binary command code A2 corresponding to the handheld device identification code of the handheld device 11 is 01000100.

Next, the first encoder 1121 will encode the binary instruction codes A1 and A2 to obtain the first pulse signal B. The first pulse signal B includes multiple high-potential signals with the same height and different widths. The high-potential signal The height of represents the voltage intensity, which will be further explained below. First, please refer to Figure 4. In this example, the high potential signal with a width of 2 milliseconds (ms) and the low potential signal with a width of 2 ms are defined as 0, and the high potential signal with a width of 4 ms and a width of 2 A low signal in milliseconds is defined as 1, where the width of a high signal represents the signal duration. Therefore, as shown in FIG. 4, the binary command code A2 corresponding to the handheld device identification code is converted into the handheld device identification signal B2 according to the aforementioned definition, and the binary command code A1 corresponding to the first playback control command 1131 is converted according to the aforementioned definition. It is converted into the playback control instruction signal B1.

Furthermore, in order to clearly define the ranges of the binary command codes A1 and A2, in this example, a start signal B3 is added before the play control command signal B1 and the handheld device identification signal B2 respectively, and a start signal B3 is added before the play control command signal B1 and the handheld device identification signal B2. The identification signal B2 is followed by a termination signal B4 respectively.

In addition, in order to clearly distinguish the binary command codes A1 and A2, in this example, a spacer signal B5 is added between the playback control command signal B1 and the handheld device identification signal B2. Finally, the playback control instruction signal B1, the handheld device identification signal B2, the start signal B3, the stop signal B4 and the interval signal B5 together constitute the first pulse signal B of this example.

It should be noted that in this example, the high potential signal with a width of 8 milliseconds and the low potential signal with a width of 2 milliseconds are defined as the start signal B3, and the high potential signal with a width of 6 milliseconds and the low potential signal with a width of 4 milliseconds are defined as the start signal B3. The low potential signal is defined as the termination signal B4, and the high potential signal with a width of 2 milliseconds and the low potential signal with a width of 20 milliseconds are defined as an interval signal B5.

Next, the first pulse signal B is sent to the first light modulator 1122 , and the first light modulator 1122 will control the screen (the first visible light emitting element 111 ) with the first pulse signal B. Because the high potential signal will make the screen (the first visible light emitting element 111) emit light, and the low potential signal will make the screen (the first visible light emitting element 111) stop emitting light, so the first pulse signal B will make the screen (the first visible light emitting element 111) ) continuously switches its on and off states at a special frequency to emit a first visible light signal P.

Then, the first light sensor 1211 senses the change of the on-off state of the screen (the first visible light emitting element 111 ) to receive the first visible light signal P and generate a corresponding first electrical signal at the same time. For example, when a photoresistor is used as the first light sensor 1211, based on the characteristic that the resistance value of the photoresistor will increase when the light source is dimmed, and the resistance value will decrease with the brightness of the light source when the light source is gradually brightened, the first The light sensor 1211 will generate a corresponding first electrical signal.

Next, the first electrical signal will be sent to the first pre-processor 1231, in this example the first pre-processor 1231 is a filter or amplifier, where the filter is used to remove unwanted components in the signal or enhance the signal The components needed in the circuit, and the amplifier is used to amplify the weak signal. Therefore, regardless of whether the first pre-processor 1231 is a filter or an amplifier, its purpose is to reduce interference so that the first electrical signal is closer to the first pulse signal B.

The first electrical signal adjusted by the first pre-processor 1231 is then sent to the first optical demodulator 1232 to restore the first electrical signal to an undecoded first pulse signal B. In this example, the first The optical demodulator 1232 is a level comparator. Finally, the undecoded first pulse signal B is sent to the first information interpreter 1233, and the first information interpreter 1233 restores the first pulse information B to the handheld device identification code according to the encoding rules of the aforementioned first encoder 1121 The corresponding binary instruction code A2 and the binary instruction code A1 corresponding to the first playback control instruction 1131, and the control information X is obtained from the binary instruction code A1 and A2.

According to the control information X, the digital audio system 12 recognizes that the handheld device 11 requests to start playing from the previous pause point. Since the digital audio system 12 will record the usage of each device, the digital audio system 12 will search for the playback record of the handheld device 11 in its data database, and start playing from the place where the handheld device 11 stopped playing the last time.

Moreover, if the user selects the second play control command 1132 and the third play control command 1133 on the user interface 113, that is, random play and play the first song list, then the digital audio system 12 will receive the corresponding song list of the handheld device identification code. After the binary instruction code A2 corresponding to the second playback control instruction 1132 and the binary instruction code corresponding to the third playback control instruction 1133, obtain the first song list corresponding to the handheld device 11 from its data database and Randomly plays the songs in the first song list.

If the user only selects the second play control command 1132 in the user interface 113, that is, random play, then the handheld device 11 will only send the binary command code corresponding to the second play control command 1132 to the digital audio system 12, so that the digital audio system 12 randomly plays songs in its data database without transmitting the handheld device identification code of the handheld device 11.

In addition, if the user selects the fourth play control command 1134 in the user interface 113 to create a song list, the user must first set the content of the song list in the user interface 113 of the handheld device 11, and then the digital audio system 12 will establish a corresponding binary command code in its data database corresponding to the handheld device 11 after receiving the binary command code A2 corresponding to the handheld device identification code, the binary command code corresponding to the fourth play control command 1134, and the binary command code corresponding to the song list. list of songs.

In short, the music playing system 1 of this example transmits the control information X through the first visible light signal P emitted by the first visible light emitting element 111 , and then controls the digital audio system 12 to perform corresponding control actions. Therefore, the music player system 1 of this example can utilize the current on-off state of the screen of the handheld device 11 to transmit the control information X to the digital audio system 12 without transmitting the control information X through wireless communication, thereby solving the aforementioned radio frequency communication problem. problems, and can perform personalized control actions by transmitting the handheld device identification code.

It should be added that the handheld device 11 of the present invention can also perform general control actions by sending other control information to the digital audio system 12, such as play, pause, previous song, next song, fast forward, fast rewind, etc.

Moreover, the present invention also provides a second embodiment, please refer to Fig. 5 and Fig. 6, Fig. 5 is the block diagram of the music playing system of the second embodiment of the present invention, Fig. 6 is the music playing system of the second embodiment of the present invention Schematic diagram of the coding rules.

The music playback system 1A of this example includes a handheld device 11A and a digital audio system 12A. The handheld device 11A includes a first transmitter controller 110A, whose purpose is to convert control information into a visible light signal. The first transmitting end controller 110A includes a first visible light emitting element 111A, a first optical signal generator 112A, and a command receiver 114A, and the first optical signal generator 112A includes a first encoder 1121A and a first optical modulator 1122A . In addition, the first visible light emitting element 111A is a screen capable of emitting light.

The digital audio system 12A includes a first receiver controller 120A, whose purpose is to restore the visible light signal to control information. The first receiver controller 120A includes a first optical sensor 1211A and a first optical signal interpreter 123A, and the first optical signal interpreter 123A includes a first pre-processor 1231A, a first optical demodulator 1232A, and a first Information Interpreter 1233A.

The difference from the first embodiment is that in this example, the binary instruction code corresponding to the control information will be converted into corresponding different color lights by the first encoder 1121A. Therefore, in this example, the first visible light emitting element 111A will Correspondingly different colored lights are emitted to convey control information.

The rules for the first encoder 1121A to convert the control information into corresponding lights of different colors are shown in FIG. 6 . First of all, in this example, the binary code corresponding to blue light is predefined as 001, the binary code corresponding to green light is 010, the binary code corresponding to red light is 100, the binary code corresponding to cyan light is 011, and the binary code corresponding to yellow light 110, the binary code corresponding to magenta light is 101, and the binary code corresponding to white light is 111.

Therefore, when the binary instruction code corresponding to the control information is 010100101, the first encoder 1121A will convert the control information into a combination of green light, red light and magenta light, so the first visible light emitting element 111A will sequentially emit green light, The red light and the magenta light are used to send out the first visible light signal PA.

The first light sensor 1211A may be a light sensor including three primary colors of red, green, and blue light. When it senses green light, red light, and magenta light in sequence and receives the first visible light signal PA, the first light signal interpreter 123A That is, it can be restored as control information.

Next, the present invention also provides a third embodiment, please refer to Fig. 7 to Fig. 9, Fig. 7 is the block diagram of the music playing system of the third embodiment of the present invention, Fig. 8 is the music playing system of the third embodiment of the present invention FIG. 9 is a schematic diagram of the coding rules of the music playing system according to the third embodiment of the present invention.

The music playback system 1B of this example includes a handheld device 11B and a digital audio system 12B. The handheld device 11B includes a first transmitter controller 110B whose purpose is to convert control information into a visible light signal. The first transmitting end controller 110B includes a first visible light emitting element 111B, a first optical signal generator 112B, and a command receiver 114B, and the first optical signal generator 112B includes a first encoder 1121B and a first optical modulator 1122B . In addition, the first visible light emitting element 111B is a screen capable of emitting light.

The digital audio system 12B includes a first receiver controller 120B, whose purpose is to restore the visible light signal to control information. The first receiver controller 120B includes a first optical sensor 1211B and a first optical signal interpreter 123B, and the first optical signal interpreter 123B includes a first pre-processor 1231B, a first optical demodulator 1232B, and a first Information Interpreter 1233B.

In this example, the first visible light signal PB is sent out through the screen (the first visible light emitting element 111B) constantly switching its on and off states at a special frequency. The difference from the first embodiment is that, as shown in FIG. 8 , in this example The binary instruction code corresponding to the control information will be converted by the first encoder 1121B into high-potential signals with different heights and widths, such as the high-potential signal H, the first pulse signal BX, and the first pulse signal BX to control the first visible light The on-off state of the emitting element 111B is used to send a first visible light signal PB. The height of the high potential signal represents the voltage intensity, and the width of the high potential signal represents the signal duration.

The rules for the first encoder 1121B to convert the control information into the first pulse signal BX including a plurality of high potential signals with different heights and widths are shown in FIG. 9 . Firstly, in this example, each high-potential signal represents four bits d3, d2, d1, and d0, d0 represents the lowest bit, d1 represents the second-lowest bit, d2 represents the second-highest bit, and d3 represents the highest bit. For example, when the high potential signal represents four bits of 0101, d3 is equal to 0, d2 is equal to 1, d1 is equal to 0, and d0 is equal to 1. It should be noted that d2 to d0 are determined by the height of the high potential signal, that is, the voltage intensity, and d3 is determined by the width of the high potential signal. In this example, when the width of the high potential signal is 2 milliseconds, the binary code corresponding to the highest bit d3 is 0, and when the width of the high potential signal is 4 milliseconds, the binary code corresponding to the highest bit d3 is 1.

Furthermore, V represents the voltage intensity. In this example, the full-scale voltage is divided into eight equal parts in advance to obtain the zero-level voltage intensity V0 to the seventh-level voltage intensity V7 and the full-scale voltage. Each level of voltage intensity has its corresponding The corresponding potential signal is shown in Figure 9. In this example, the binary code corresponding to the high potential signal whose height is between the zero-level voltage intensity V0 and the first-level voltage intensity V1 is 000, and the high-potential signal whose height is between the first-level voltage intensity V1 and the second-level voltage intensity V2 The binary code corresponding to the high-potential signal is 001, and the binary code corresponding to the high-potential signal whose height is between the second-level voltage intensity V2 and the third-level voltage intensity V3 is 010, and the height is between the third-level voltage intensity V3 and the fourth-level voltage intensity. The binary code corresponding to the high-potential signal between the voltage intensity V4 of the first level is 011, and the corresponding binary code of the high-potential signal between the fourth level voltage intensity V4 and the fifth level voltage intensity V5 is 100, and the height is between the fifth level The binary code corresponding to the high-potential signal between the voltage intensity V5 and the sixth-level voltage intensity V6 is 101, and the binary code corresponding to the high-potential signal between the sixth-level voltage intensity V6 and the seventh-level voltage intensity V7 is 110. The binary code corresponding to the high potential signal whose height is between the seventh level voltage intensity V7 and the full scale voltage is 111.

It should be noted that in this example, the voltage strength of the start signal B3 (as shown in Figure 8) can be used as the basis for the full scale voltage. When the signal changes due to various factors, the start signal B3 can be used The high potential signal is used as a reference to compensate for the difference.

Please refer to FIG. 8 and FIG. 9 at the same time. In this example, the binary command code corresponding to the playback control command included in the control information is 0111110101100110, and the binary command code corresponding to the handheld device identification code included in the control information is 0110110101110101.

The first encoder 1121B first converts the binary instruction code corresponding to the playback control instruction into a playback control instruction signal B1X. Based on the encoding rule shown in Figure 9, the playback control instruction signal B1X includes a high potential signal with a height between the seventh level voltage intensity V7 and the full scale voltage and a width of 2 milliseconds, and a height between the fifth level voltage intensity V5 and the first level. A high-potential signal with a width of 4 milliseconds between the sixth-level voltage intensity V6, a high-potential signal with a width of 2 milliseconds between the sixth-level voltage intensity V6 and the seventh-level voltage intensity V7, and a height between the sixth-level voltage A high potential signal with a width of 2 milliseconds between the intensity V6 and the seventh level voltage intensity V7 is shown in FIG. 8 .

Next, the first encoder 1121B converts the binary instruction code corresponding to the handheld device identification code into a handheld device identification signal B2X. Based on the encoding rule shown in Figure 9, the handheld device identification signal B2X includes a high potential signal with a height between the sixth level voltage intensity V6 and the seventh level voltage intensity V7 and a width of 2 milliseconds, and a height between the fifth level voltage intensity A high-potential signal with a width of 4 milliseconds between V5 and the sixth-level voltage intensity V6, a high-potential signal with a width of 2 milliseconds between the seventh-level voltage intensity V7 and the full scale voltage, and a height between the fifth-level voltage A high potential signal with a width of 2 milliseconds between the intensity V5 and the sixth level voltage intensity V6.

Then, before the playback control command signal B1X and the handheld device identification signal B2X, the same initial signal B3 as the first embodiment is respectively added, and after the playback control command signal B1X and the handheld device identification signal B2X, the same start signal as the first embodiment is respectively added. An interval signal B5 is added between the end signal B4, the playback control command signal B1X and the handheld device identification signal B2X to form the first pulse signal BX of this example.

Therefore, the first light modulator 1122B controls the on-off state of the first visible light emitting element 111B according to the first pulse signal BX to send out the first visible light signal PB. It should be noted that the greater the voltage intensity, the greater the luminous intensity of the first visible light emitting element 111B, and vice versa.

After the first light sensor 1211B senses and receives the first visible light signal PB, the first light signal interpreter 123B can restore it to control information.

Based on the above descriptions, it can be seen that the encoding methods of the first embodiment, the second embodiment and the third embodiment can provide different data transmission rates, wherein the encoding method of the third embodiment is to use a high potential signal to represent four bits, Compared with the implementation of using a high potential signal to represent a bit, the encoding method of the third embodiment can increase the transmission speed of the control command to nearly eight times the transmission speed. However, the aforementioned three encoding methods are only for illustration purposes, and are not intended to limit the encoding methods of the music playing system of the present invention.

It should be noted that in the present invention, a checksum (Checksum) mechanism or a cyclic redundancy check (Cyclic redundancy check, CRC) mechanism can be used to ensure that the playback control instruction and the handheld device identification code restored by the first optical signal reader correct.

The checksum mechanism and the cyclic redundancy check mechanism are commonly used methods by those skilled in the art, so details will not be described here.

In addition, the present invention also provides a fourth embodiment. Please refer to FIG. 10 and FIG. 11 at the same time. FIG. System block diagram.

As shown in FIG. 10 and FIG. 11 , the music playing system 2 includes a handheld device 21 and a digital audio system 22 . In this example, the handheld device 21 includes a first transmitting-end controller 215 and a second receiving-end controller 216, and the first transmitting-end controller 215 includes a first visible light emitting element 210, a first optical signal generator 212, and a command receiving The second receiver controller 216 includes a second light sensor 211 and a second light signal interpreter 214 .

The digital audio system 22 includes a first receiving-end controller 225 and a second sending-end controller 226, and the first receiving-end controller 225 includes a first light sensor 221 and a first light signal interpreter 222, and the second sending-end controller 226 includes the second visible light emitting element 220 , the second light signal generator 224 and the command receiver 227 .

The first optical signal generator 212 includes a first encoder 2120 and a first optical modulator 2121 . The second optical signal interpreter 214 includes a second pre-processor 2141 , a second optical demodulator 2142 and a second information interpreter 2143 . The first optical signal interpreter 222 includes a first pre-processor 2220 , a first optical demodulator 2221 and a first information interpreter 2222 . The second optical signal generator 224 includes a second encoder 2241 and a second optical modulator 2242 . In this example, the first visible light emitting element 210 is a screen, the second visible light emitting element 220 is a control panel, and the second light sensor 211 is a two-dimensional photosensitive element in the camera module.

It should be noted that the two-dimensional photosensitive element in the camera module may be a charge-coupled device (Charge-coupled Device, CCD), a complementary metal oxide semiconductor (Complementary Metal-Oxide Semiconductor, CMOS), etc., but not limited thereto.

Moreover, the handheld device 21 is not limited to using the photosensitive element of the camera module as the second light sensor, and the handheld device 21 can also use the ambient light sensor 213 as the second light sensor. It should be added that the function of the ambient light sensor is to enable the handheld device 21 to adjust the brightness of the screen (the first visible light emitting element 210 ) according to the ambient brightness.

In addition, the digital audio system 22 is not limited to using the control panel as the second visible light emitting element. The digital audio system 22 can also use the indicator light 223 as the second visible light emitting element, wherein the indicator light 223 is a light emitting diode.

In addition to the control function of the music playing system 1 of the first embodiment, the music playing system 2 of this example can also use the first visible light emitting element 210, the first light signal generator 212, and the second light sensor 211 of the hand-held device 21. , the second optical signal interpreter 214, the first optical sensor 221 of the digital audio system 22, the first optical signal interpreter 222, the second visible light emitting element 220 and the second optical signal generator 224 to complete the connection between the handheld device 21 and the digital audio system 22 pairing, so that the handheld device 21 and the digital audio system 22 can exchange data, which will be further described below.

Please refer to FIG. 10 to FIG. 12 at the same time. FIG. 12 is a schematic diagram of the user interface of the music playing system according to the fourth embodiment of the present invention. First, when the user wants to pair the handheld device 21 with the digital audio system 22, the user can click and open an application (APP) on the handheld device 21. This application program can be built in the handheld device 21 or the user Installed in the handheld device 21 after downloading.

When the application program is opened, a user interface 217 will be displayed on the screen (the first visible light emitting element 210), and the user interface 217 will at least include a pairing option 2171. After the user clicks the pairing option 2171, the handheld The device 21 will prompt the user to move the screen (the first visible light emitting element 210 ) close to the first light sensor 221 of the digital audio system 22 .

Next, the instruction receiver 218 sends the control information generated when the pairing option 2171 is clicked to the first light signal generator 212 to convert the control information into a first pulse signal, and then convert the first pulse signal into a first visible light Signal Q. In this example, the control information is a pairing command, and the first pulse signal includes a start signal B3, an end signal B4, and a pairing command signal generated after encoding the binary command code corresponding to the pairing command. The operation process of the first optical signal generator 212 converting the control information into the first visible light signal Q is the same as the operation process of the first optical signal generator 112 converting the control information X into the first visible light signal P in the first embodiment, It will not be repeated here.

After the first light sensor 221 of the digital audio system 22 receives the first visible light signal Q, the first light signal interpreter 222 restores the first visible light signal Q to control information, and its operation flow is the same as that of the first light signal interpretation in the first embodiment. The operation process of restoring the first visible light signal P to the control information X by the device 123 is the same, and will not be repeated here.

Then the instruction receiver 227 of the digital audio 22 transmits the audio device identification code to the second encoder 2241 and the second light modulator 2242 according to the control information, that is, the pairing instruction, so as to convert the audio device identification code into a second pulse signal, And control the second visible light emitting element 220 with the second pulse signal, so that the second visible light emitting element 220 continuously switches its on and off states at a special frequency to send out a second visible light signal R. In this example, the audio device identification code is the built-in pairing password of the digital audio system 22, such as 8888, 0000, 1111, etc., for pairing purposes. The second pulse signal will include a start signal B3, a stop signal B4, and a pairing instruction signal generated after encoding the binary instruction code corresponding to the audio device identification code.

The operation flow of the second encoder 2241 and the second light modulator 2242 is the same as that of the first encoder 1121 and the first light modulator 1122 in the first embodiment, so it will not be repeated here.

Moreover, when the second light sensor 211 senses the second visible light signal R transmitted by the on-off state of the second visible light emitting element 220 and generates a corresponding second electric signal, the second pre-positioning of the second light signal interpreter 214 The processor 2141 first adjusts the second electrical signal to reduce interference. Next, the second optical demodulator 2142 restores the second electrical signal to a second pulse signal. Finally, the second information interpreter 2143 restores the second pulse signal to the audio device identification code. The second pre-processor 2141 is a filter or amplifier, and the second optical demodulator 2142 is a level comparator.

The operation flow of the second pre-processor 2141, the second optical demodulator 2142 and the second information interpreter 2143 is the same as that of the first pre-processor 1231, the first optical demodulator 1232 and the first embodiment of the first embodiment. The operation process of the information interpreter 1233 is substantially the same, and will not be repeated here.

After the handheld device 21 obtains the audio device identification code, the user interface 217 on the screen (the first visible light emitting element 210) will display the user code of the digital audio 22, and after the user clicks the user code of the digital audio 22, the handheld device 21 will complete the pairing process, and then the handheld device 21 can transmit data with the digital audio system 22 .

According to the above-mentioned embodiments, the music playing system of the present invention uses the visible light emitting element and the light sensor to complete the control information transmission between the handheld device and the digital audio system, and uses the transmission of the handheld device identification code to perform personalized control behavior. Therefore, the music playing system of the present invention not only solves the aforementioned problems of wireless communication, but also can make good use of the basic components of the handheld device to extend and change its application, and can quickly and conveniently control the digital audio to perform corresponding control behaviors, especially personalized control behavior. In addition, the music playing system of the present invention can also complete the pairing between the handheld device and the digital audio system through visible light communication, so as to solve the problem of complicated operation and error-prone when pairing through wireless communication.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the claims of the present invention. Therefore, all other equivalent changes or modifications that do not deviate from the spirit disclosed in the present invention should be included in this disclosure. within the scope of the claimed invention.

Claims (15)

1. a kind of music playing system, including：

Hand-hold device, including one first transmission side controller, wherein the first transmission side controller include：

One first VISIBLE LIGHT EMISSION element；And

One first optical signal generator, is used to for a control information to be converted to one first pulse signal and with first pulse signal The light on and off state of the first VISIBLE LIGHT EMISSION element is controlled to send one first visible light signal；And

One digital sound, including a main frame and an audio amplifier are used to play a digital music file, and the digital sound also includes One first receives side controller, and wherein the first reception side controller includes：

One first optical sensor, is used to sense the light on and off state of the first VISIBLE LIGHT EMISSION element to receive first visible ray letter Number；And

One first optical signal plug-in reader, is used to for first visible light signal to be reduced to the control information；

Wherein, after the digital sound receives the control information, the digital sound performs a corresponding control according to the control information Behavior processed, and the control information includes that at least one plays control instruction or at least one broadcasting control instruction and hand-hold device Identification code；

Wherein the control information is a matched order；

Wherein：

The digital sound also includes：

One second sends side controller, including：

One second VISIBLE LIGHT EMISSION element；And

One second optical signal generator, is used to for a PA-system identification code of the digital sound to be converted to one second pulse signal And the light on and off state of the second VISIBLE LIGHT EMISSION element is controlled to send second visible light signal with second pulse signal；With And

The hand-held device also includes：

One second receives side controller, including：

One second optical sensor, is used to sense the light on and off state of one second VISIBLE LIGHT EMISSION element to receive one second visible ray letter Number；And

One second optical signal plug-in reader, is used to for second visible light signal to be reduced to the PA-system identification code；

Wherein in the digital sound after the control information is received, the second transmission side controller turns the PA-system identification code It is changed to second visible light signal.

2. music playing system as claimed in claim 1, wherein first optical signal generator includes：

One first encoder, is used to for the control information to be converted to first pulse signal；And

One first optical modulator, the light on and off state for controlling the first VISIBLE LIGHT EMISSION element with first pulse signal.

3. music playing system as claimed in claim 2, wherein the first optical signal plug-in reader includes：

One first preprocessor, is used to adjust one first electric signal to reduce interference, wherein first electric signal in this first Optical sensor is produced when sensing the light on and off state of the first VISIBLE LIGHT EMISSION element；

One first optical demodulator, is used to for first electric signal to be reduced to first pulse signal；And

One first information interpreter, is used to for first pulse signal to be reduced to the control information.

4. music playing system as claimed in claim 3, wherein first preprocessor are a wave filter or an amplifier, First optical demodulator is a level comparator.

5. music playing system as claimed in claim 1, wherein first pulse signal include multiple having identical voltage strong The high potential signal of degree and different in width.

6. music playing system as claimed in claim 1, wherein first pulse signal include multiple having different voltages strong The high potential signal of degree and different in width, each of which high potential signal represents four bits.

7. the full lattice voltage of music playing system as claimed in claim 6, wherein the one of the high potential signal is with an initial signal Voltage strength as foundation.

8. music playing system as claimed in claim 1, the wherein hand-held device also are used to provide one and use including a screen Person's interface, wherein user's interface select to transmit the control information with for a user.

9. music playing system as claimed in claim 1, wherein the first VISIBLE LIGHT EMISSION element of the hand-held device are one Screen or a flash lamp.

10. the music playing system as described in claim 1, the wherein hand-held device are an intelligent mobile phone or flat board electricity Brain.

Second optical signal generator of 11. music playing systems as claimed in claim 1, the wherein digital sound includes：

One second encoder, is used to for the PA-system identification code to be converted to second pulse signal；And

One second optical modulator, the light on and off state for controlling the second VISIBLE LIGHT EMISSION element with second pulse signal.

The second optical signal plug-in reader of 12. music playing systems as claimed in claim 11, the wherein hand-held device includes：

One second preprocessor, is used to adjust one second electric signal to reduce interference, wherein second electric signal in this second Optical sensor is produced when sensing the light on and off state of the second VISIBLE LIGHT EMISSION element；

One second optical demodulator, is used to for second electric signal to be reduced to second pulse signal；And

One second information interpretation device, is used to for second pulse signal to be reduced to the PA-system identification code.

The second VISIBLE LIGHT EMISSION element of 13. music playing systems as claimed in claim 1, the wherein digital sound is one Control panel or an indicator lamp.

Second optical sensor of 14. music playing systems as claimed in claim 1, the wherein hand-held device is a shooting mould Block photo-sensitive cell or an ambient light sensor.

15. music playing systems as claimed in claim 1, the wherein hand-held device also are used to provide one and use including a screen Person's interface, wherein user's interface select to start a pairing flow with for a user.