Music car cabin audio playback system

Abstract

The application relates to a music compartment audio playing system which comprises a plurality of audio playing terminal subsystems. The plurality of audio playing terminal subsystems are connected with each other through a digital network and an analog audio network. The audio playing terminal subsystem comprises an audio playing terminal control box, an audio playing terminal operation man-machine interface and an audio playing terminal sound box, and the audio playing terminal control box is connected with the audio playing terminal operation man-machine interface and the audio playing terminal sound box. One of the audio playing terminal subsystems is a master system, and the rest are slave systems, and the master system controls the audio synchronous playing of the rest of the slave systems through the digital network and the analog audio network. The application realizes the synchronous audio playing through a single sound source through the analog audio network, so that the synchronous performance of the music playing of the plurality of audio playing terminals in the same compartment is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to a music carriage, in particular to a music carriage audio playing system. BACKGROUND

[0002] With the continuous progress of transportation technology and the continuous improvement of people's living standards, the public transportation passenger users have higher and higher requirements for the service level of public transportation tools. Therefore, the operation department has launched more and more service functions through the integration of transportation tools and innovative technologies to improve the experience of people riding public transportation tools. The development of China's rail transit field in this regard has always been at the forefront of the world, including high-speed trains, subway trains, and other new technologies for riding experience,

[0003] At present, the music carriage realizes the playing of carriage background music through the configuration of high-performance audio equipment, provides carriage background music appreciation service for passengers, and plays train broadcasting audio for station service. At the same time, in order to meet the different needs of different passengers for music types, multiple independent audio playing terminals will be set up in the same music carriage, requiring the audio terminals to be able to play background music synchronously and to be able to play different music pieces that meet the different tastes of passengers by switching through operation (such as touch or key operation).

[0004] In the process of implementing the present application, the applicant found that the current music carriage at least has the following technical problems:

[0005] 1. In order to meet the different needs of different passengers, multiple audio playing terminals are set up in the same carriage for passengers to use. When playing background music or station audio, if the multiple audio playing terminals cannot be highly synchronized, the sound of the music played in the carriage will become chaotic and particularly noisy, which seriously reduces the passenger riding experience.

[0006] 2. For the love needs of individual passengers that are different from the type of background music played synchronously, a scheme is needed to switch a single audio terminal from background music synchronous playing to local music playing that can be freely selected by passengers, and the switching of local music cannot lead to the failure to meet the needs of other passengers for background music or station audio synchronous playing.

[0007] Therefore, in order to solve the above problems and considering the needs of application scenarios, it is urgently needed to propose a music carriage audio playing system solution that integrates the switching method of local playing of audio playing terminals and synchronous playing of background music or station audio. SUMMARY

[0008] In order to solve the above problems existing in the current music carriage, the embodiments of the present application provide a music carriage audio playing system. The specific technical solutions are as follows:

[0009] In a first aspect, a music carriage audio playing system is provided, which comprises a plurality of audio playing terminal subsystems. The plurality of audio playing terminal subsystems are connected to each other through a digital network and an analog audio network. The audio playing terminal subsystem comprises an audio playing terminal control box, an audio playing terminal operation man-machine interface and an audio playing terminal sound box, and the audio playing terminal control box is connected to the audio playing terminal operation man-machine interface and the audio playing terminal sound box. One of the audio playing terminal subsystems is a master system, and the rest are slave systems, and the master system controls the audio synchronous playing of the rest of the slave systems through the digital network and the analog audio network.

[0010] In a first possible implementation manner of the first aspect, the audio playing terminal control box comprises a power supply, a control board, a power amplifier board, a first relay and a second relay, the power supply is connected to the control board, the control board is connected to the audio playing terminal operation man-machine interface through a control interface, the first relay and the second relay are in communication connection, an audio output interface of the control board is connected to a common interface of the first relay and a normally open interface of the second relay, a common interface of the second relay is connected to an audio input port of the power amplifier board, and the power amplifier board is connected to the audio playing terminal sound box; a network port of the control board is connected to the digital network for transmission of control signals between the audio playing terminal subsystems; the normally open interface of the first relay and the normally closed interface of the second relay are connected to the analog audio network for transmission of audio signals between the audio playing terminal subsystems.

[0011] In the second possible implementation manner of the first aspect, in combination with the first possible implementation manner of the first aspect, when the audio is played synchronously, the control board of the master system controls the first relay and the second relay to switch to the normally open contact, so that the audio output interface is connected to the power amplifier board and the analog audio network; the control board of the master system simultaneously sends a control signal to the control boards of the rest of the slave systems through the digital network, and the control boards of the rest of the slave systems control the first relay and the second relay to switch to the normally closed contact, so that the power amplifier board is connected to the analog audio network and disconnected from the audio output interface.

[0012] In the third possible implementation manner of the first aspect, in combination with the second possible implementation manner of the first aspect, when the master system switches to play local audio, the control board of the master system controls the first relay to switch to the normally closed contact, so that the audio output interface is disconnected from the analog audio network; the control board of the master system simultaneously sends a control signal to the control boards of the rest of the slave systems through the digital network, and controls one of the rest of the slave systems that does not play local audio to become another master system, so as to provide an audio source for the audio synchronous playing of the rest of the slave systems.

[0013] In conjunction with the third possible implementation of the first aspect, in the fourth possible implementation of the first aspect, when the main system completes the local audio playback task or does not operate the interface for a long time, it prompts the user whether to continue the local operation. If a negative confirmation is received or no confirmation is received for a long time, the control board of the main system controls the second relay to switch to the normally closed contact, so that the audio output interface of the control board is disconnected from the power amplifier board and the analog audio network, and the power amplifier board is connected to the analog audio network, making the main system a slave system.

[0014] In conjunction with the second possible implementation of the first aspect, in the fifth possible implementation of the first aspect, when one or more slave systems switch to playing local audio, the control board of the corresponding slave system controls the second relay to switch to the normally open contact, so that the power amplifier board is connected to the audio output interface and disconnected from the analog audio network, and the main system continues to control the audio synchronous playback of the other slave systems that have not switched to playing local audio.

[0015] In conjunction with the second possible implementation of the first aspect, in the sixth possible implementation of the first aspect, when the system completes the local audio playback task or the interface is not operated for a long time, the user is prompted whether to continue the local operation. If a negative confirmation is received or no confirmation is received for a long time, the control board of the system controls the second relay to switch to the normally closed contact, so that the power amplifier board is connected to the analog audio network and disconnected from the audio output interface, and switches to receiving the synchronous audio signal sent by the main system for synchronous audio playback.

[0016] In conjunction with the first possible implementation of the first aspect, in the seventh possible implementation of the first aspect, the control interface is a serial port, Ethernet, or I / O interface.

[0017] In the eighth possible implementation of the first aspect, both the digital network and the analog audio network interfaces are designed with bypass.

[0018] In the ninth possible implementation of the first aspect, the audio playback terminal speaker is a loudspeaker or a surface-emitting glass.

[0019] The advantages of this application compared to the prior art are as follows:

[0020] The music carriage audio playback system of this application sets one of the multiple audio playback terminal subsystems as the master system and the rest as slave systems. The master system controls the audio synchronous playback of the remaining slave systems through a digital network and an analog audio network. In this way, synchronous audio playback is achieved through a single sound source via an analog audio network, thereby ensuring the synchronous performance of music playback on multiple audio playback terminals in the same carriage.

[0021] In addition, the music carriage audio playback system of this application can provide users with local playback function based on any audio playback terminal subsystem while realizing synchronous audio playback, without affecting the normal playback of synchronous audio, and can realize flexible switching between synchronous playback and local playback. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a network topology diagram of a music carriage audio playback system according to an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the audio switching scheme of a music carriage audio playback system according to an embodiment of this application. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0026] Please see Figure 1 This is a network topology diagram of a music carriage audio playback system according to an embodiment of this application. As shown in the figure, the music carriage audio playback system 1 includes multiple audio playback terminal subsystems 2. These multiple audio playback terminal subsystems 2 are located within the carriage S and are interconnected via a digital network and an analog audio network. The digital network is mainly used for transmitting control signals between the audio playback terminals. The digital network is an industrial Ethernet network, and by configuring a dual-port switch with bypass functionality, cascading networking of the audio playback terminals is achieved. This cascading networking scheme facilitates vehicle wiring.

[0027] Analog audio networks are primarily used to transmit differential audio signals between audio playback terminals to achieve synchronized audio playback. These networks are mainly built on a differential audio bus, offering strong anti-interference capabilities and adaptability to the onboard environment of rail transit trains. Simultaneously, the analog differential audio signals can be directly amplified by the power amplifier board and used to drive audio playback, eliminating the need for digital audio signal decoding. This avoids the problems of asynchronous audio playback and chaotic sound caused by inconsistent real-time performance of different terminals leading to asynchronous digital decoding, thus maximizing the synchronization of audio playback across terminals in the same carriage. Furthermore, by configuring differential audio interfaces with bypass functionality, cascading networking of audio playback terminals is achieved, facilitating vehicle wiring.

[0028] In the actual setup of the music carriage audio playback system 1 in this embodiment, one audio playback terminal subsystem 2 is the master system, and the rest are slave systems. The master system controls the audio synchronous playback of the other slave systems through a digital network and an analog audio network. In this way, synchronous audio playback is achieved through a single sound source via an analog audio network, thereby ensuring the synchronous performance of music playback on multiple audio playback terminals in the same carriage.

[0029] See also Figure 1 As shown, the audio playback terminal subsystem 2 includes an audio playback terminal control box 21, an audio playback terminal human-machine interface 23, and an audio playback terminal speaker 24. The audio playback terminal control box 21 is connected to the audio playback terminal human-machine interface 23 and the audio playback terminal speaker 24. The audio playback terminal control box 21, the audio playback terminal human-machine interface 23, and the audio playback terminal speaker 24 are internally interconnected through control signal transmission channels and audio signal transmission channels, jointly forming an audio playback terminal subsystem with audio playback and control functions. In this embodiment, the audio playback terminal speaker 24 can be a loudspeaker or other audio playback devices such as a surface-emitting glass.

[0030] Please refer to the following: Figure 2 This is a schematic diagram of the audio switching scheme of a music carriage audio playback system according to an embodiment of this application. As shown in the figure, the audio playback terminal control box 21 includes a power supply 211, a control board 212, a power amplifier board 213, a first relay 214, and a second relay 215. The power supply 211 is connected to the control board 212 to supply power to the control board 212. The control board 212 is connected to the audio playback terminal human-machine interface 23, the first relay 214, and the second relay 215 through a control interface 2121. The control interface 2121 can be a serial port, Ethernet, or an I / O interface, but is not limited to these.

[0031] The audio output interface 2122 of the control board 212 is connected to the common interface 2141 of the first relay 214 and the normally open interface 2151 of the second relay 215. The common interface 2153 of the second relay 215 is connected to the audio input port 2131 of the power amplifier board 213, which is connected to the audio playback terminal speaker 24. The network ports 2123 of the multiple control boards 212 are connected to a digital network for control signal transmission between the various audio playback terminal subsystems 2. The normally open interface 2142 of the first relay 214 and the normally closed interface 2152 of the second relay 215 are connected to an analog audio network, providing an interface for external audio communication through switching control, thereby realizing audio signal transmission between the various audio playback terminal subsystems 2.

[0032] When the audio is played synchronously, the main system control board 212 controls both the first relay 214 and the second relay 215 to switch to their normally open contacts, thus connecting the audio output interface 2122 with the power amplifier board 213 and the analog audio network. At this time, as... Figure 2 As shown, on the one hand, the internal audio bus link 1-AL1->3-AL1->PAL1 of the main system is opened, so that the power amplifier board 213 can drive the audio output signal of the audio playback control board. On the other hand, the external audio bus link 1-AL1->2-AL1->1-AL2 is opened, so that the audio signal of the control board 212 of the main system can be transmitted to its slave system, laying the foundation for synchronous audio playback.

[0033] As described above, the main system control board 212 simultaneously sends control signals to the control boards 212 of the other slave systems via the digital network. The control boards 212 of the other slave systems control the first relay 214 and the second relay 215 to switch to normally closed contacts, so that the power amplifier board 213 is connected to the analog audio network and disconnected from the audio output interface 2122. At this time, the analog audio bus link 1-AL1—>2-AL1—>1-AL2—>1-AL3—>PAL2 between the main system and the slave systems is opened, and so on, so that the analog audio network is fully opened, so that the main system and the other slave systems can simultaneously play the audio provided by the main system control board 212, thereby realizing the synchronous playback of multiple audio playback terminal subsystems 2 in the same carriage.

[0034] The multi-audio playback terminal subsystem 2, while simultaneously playing audio synchronously, can provide users with local playback functionality based on any one of the terminals. That is, users can control the playback of local audio through the human-machine interface 23 of any audio playback terminal in the audio playback terminal subsystem 2, without affecting the normal playback of synchronous audio. Since the music carriage audio playback system 1 in this embodiment is configured as a master system and a slave system, the switching from synchronous audio playback to local audio playback includes two scenarios: switching from local playback on the master system and switching from local playback on the slave system. The working principles are explained below:

[0035] 1. When the main system switches to playing local audio, such as Figure 2 As shown, the main system's control board 212 controls the first relay 214 to switch to the normally closed contact 2143, disconnecting the audio output interface 2122 from the analog audio network. At this time, the external audio bus link 1-AL1—>2-AL1—>1-AL2 is disconnected, preventing the audio signal from the main system's control board 212 from being transmitted to its slave system, thus breaking the basic conditions for synchronous audio playback. Under these circumstances, the main system can freely enter the local audio playback mode based on the audio playback terminal operation human-machine interface 23, allowing users to freely select their favorite audio for local playback.

[0036] As described above, the main system's control board 212 simultaneously sends control signals to the control boards 212 of the other slave systems via the digital network, controlling one of the slave systems that is not currently playing local audio to become another main system, providing an audio source for the synchronized audio playback of the other slave systems. For example, Figure 2 The intermediate slave system becomes another master system. The first relay 214 and the second relay 215 inside it are both switched to normally open contacts. At this time, on the one hand, the internal audio bus link 2-AL2—>4-AL2—>PAL2 of the master system is opened, so that the power amplifier board 213 can drive the audio output signal of the audio playback control board. On the other hand, the external audio bus link 2-AL2—>3-AL2—>1-AL3—>1-AL4 is opened, so that the audio signal of the control board 212 of the other master system can be transmitted to its slave system to achieve synchronous audio playback.

[0037] When the main system completes its local audio playback task or remains inactive for an extended period (configurable duration), the user is prompted via the audio playback terminal's human-machine interface 23 to continue local operation. The prompts may be displayed via indicator lights or a screen. If a negative confirmation is received, or if no confirmation is received for an extended period (configurable duration), the main system's control board 212 controls the second relay 215 to switch to its normally closed contact 2152. This disconnects the audio output interface 2121 of the control board 212 from the power amplifier board 213 and the analog audio network, while the power amplifier board 213 remains connected to the analog audio network. This disconnects the internal audio bus link 1-AL1->3-AL1->PAL1, while simultaneously opening the external audio bus link 1-AL2->4-AL1->PAL1. This allows the main system to become a slave system, receiving synchronous audio signals from another main system and enabling synchronous audio playback.

[0038] 2. When one or more slave systems switch to playing local audio, the corresponding slave system's control board 212 controls the second relay 215 to switch to the normally open contact 2151, connecting the power amplifier board 213 to the audio output interface 2122 and disconnecting it from the analog audio network. The main system continues to control the synchronous playback of audio from the remaining slave systems that have not switched to playing local audio. For example... Figure 2When the intermediate slave system switches to play local audio, its internal second relay 215 switches to the normally open contact 2151. At this time, on the one hand, the external audio communication links 2-AL2->4-AL2->1-AL3 and 1-AL3->PAL2 are disconnected, and on the other hand, the internal audio communication link 2-AL2->4-AL2->PAL2 is opened. This disconnects the audio communication bus between the intermediate slave system and the main system and other slave systems, and enables the audio playback terminal speaker 24 of the intermediate slave system to play the audio output from the local control board. This allows the user to enter the local audio playback mode based on the human-machine interface 23 of the audio playback terminal and select any audio they like to play.

[0039] When the system completes a local audio playback task or remains inactive for an extended period (configurable duration), the user is prompted via the audio playback terminal's human-machine interface 23 to confirm whether to continue local operation. The prompts may be displayed via indicator lights or a screen. If a negative confirmation is received, or if no confirmation is received for an extended period (configurable duration), the system's control board 212 controls the second relay 215 to switch to its normally closed contact 2152. This connects the power amplifier board 213 to the analog audio network and disconnects it from the audio output interface 2122. Simultaneously, it establishes the external audio communication link 1-AL2->1-AL3->PAL2, switching to receive the synchronous audio signal from the main system for synchronized audio playback.

[0040] In summary, this application provides a music-playing audio system for a train carriage. This application designates one of multiple audio playback terminal subsystems as the master system, and the rest as slave systems. The master system controls the synchronized audio playback of the remaining slave systems via a digital network and an analog audio network. This achieves synchronized audio playback from a single sound source through an analog audio network, thereby ensuring the synchronized performance of music playback from multiple audio playback terminals in the same carriage.

[0041] In addition, the music carriage audio playback system of this application can provide users with local playback function based on any audio playback terminal subsystem while realizing synchronous audio playback, without affecting the normal playback of synchronous audio, and can realize flexible switching between synchronous playback and local playback.

[0042] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0043] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A music carriage audio playback system, characterized in that, include: Multiple audio playback terminal subsystems are interconnected through digital and analog audio networks. The audio playback terminal subsystem includes an audio playback terminal control box, an audio playback terminal human-machine interface, and an audio playback terminal speaker. The audio playback terminal control box is connected to the audio playback terminal human-machine interface and the audio playback terminal speaker. One of the audio playback terminal subsystems is the master system, and the rest are slave systems. The master system controls the synchronous audio playback of the remaining slave systems through the digital network and the analog audio network. The audio playback terminal control box includes a power supply, a control board, a power amplifier board, a first relay, and a second relay. The power supply is connected to the control board. The control board is connected to the human-machine interface of the audio playback terminal via a control interface. The first relay and the second relay are communicatively connected. The audio output interface of the control board is connected to the common interface of the first relay and the normally open interface of the second relay. The common interface of the second relay is connected to the audio input port of the power amplifier board. The power amplifier board is connected to the audio speaker of the audio playback terminal. The network ports of multiple control boards are connected to the digital network for control signal transmission between the various audio playback terminal subsystems. The normally open interface of the first relay and the normally closed interface of the second relay are connected to the analog audio network for audio signal transmission between the various audio playback terminal subsystems. When audio is played synchronously, the control board of the main system controls both the first and second relays to switch to normally open contacts, connecting the audio output interface to the power amplifier board and the analog audio network. Simultaneously, the control board of the main system sends control signals to the control boards of the other slave systems through the digital network. The control boards of the other slave systems control both the first and second relays to switch to normally closed contacts, connecting the power amplifier board to the analog audio network and disconnecting it from the audio output interface. When the master system switches to play local audio, the control board of the master system controls the first relay to switch to a normally closed contact, disconnecting the audio output interface from the analog audio network. At the same time, the control board of the master system sends control signals to the control boards of the other slave systems through the digital network, controlling one of the slave systems that is not playing local audio to become another master system, providing an audio source for the synchronous playback of audio in the other slave systems. When one or more of the slave systems switch to playing local audio, the control board of the corresponding slave system controls the second relay to switch to the normally open contact, so that the power amplifier board is connected to the audio output interface and disconnected from the analog audio network. The master system continues to control the audio synchronous playback of the other slave systems that have not switched to playing local audio.

2. The music carriage audio playback system according to claim 1, characterized in that, When the main system completes the local audio playback task or the interface is not operated for a long time, it prompts the user whether to continue the local operation. If a negative confirmation is received or no confirmation is received for a long time, the control board of the main system controls the second relay to switch to the normally closed contact, so that the audio output interface of the control board is disconnected from the power amplifier board and the analog audio network, and the power amplifier board is connected to the analog audio network, so that the main system becomes a slave system.

3. The music carriage audio playback system according to claim 1, characterized in that, When the slave system completes a local audio playback task or the interface remains inactive for an extended period, it prompts the user to confirm whether to continue local operation. If a negative confirmation is received or no confirmation is received for an extended period, the slave system's control board controls the second relay to switch to a normally closed contact, connecting the power amplifier board to the analog audio network and disconnecting it from the audio output interface. This allows the slave system to receive the synchronous audio signal from the master system for synchronized audio playback.

4. The music carriage audio playback system according to claim 1, characterized in that, The control interface is a serial port, Ethernet, or I / O interface.

5. The music carriage audio playback system according to claim 1, characterized in that, Both the digital network and the analog audio network interfaces employ a bypass design.

6. The music carriage audio playback system according to claim 1, characterized in that, The audio playback terminal speaker is a loudspeaker or a sound-emitting glass surface.

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