CN107786284B - Audio transmission system and method with multi-stage cross backup architecture - Google Patents
Audio transmission system and method with multi-stage cross backup architecture Download PDFInfo
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- CN107786284B CN107786284B CN201711015163.7A CN201711015163A CN107786284B CN 107786284 B CN107786284 B CN 107786284B CN 201711015163 A CN201711015163 A CN 201711015163A CN 107786284 B CN107786284 B CN 107786284B
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Abstract
The invention discloses an audio transmission system with a multistage cross backup framework, which comprises a microphone, a microphone distributor, a main transmission system and a standby transmission system, wherein the main transmission system comprises a main digital sound console, a main digital audio processor, a main digital audio interface box and a main loudspeaker which are sequentially connected; the standby transmission system comprises a standby digital sound console, a standby digital audio processor, a standby digital audio interface box and a standby loudspeaker which are sequentially connected; the audio transmission system comprises a plurality of different cross backup devices arranged between the main transmission system and the standby transmission system and is used for realizing multi-level cross backup in audio signal transmission. The invention provides an audio transmission system with higher reliability and stability and seamless automatic switching, and also provides an audio transmission method with multi-level cross backup, so that the audio signal transmission has higher reliability and stability.
Description
Technical Field
The present invention relates to the field of audio transmission technologies, and in particular, to an audio transmission system and method with a multi-level cross backup architecture.
Background
An audio transmission system in the prior art generally includes two sets of transmission systems, which are respectively used as a main transmission system and a standby transmission system, and transmit audio signals in a mode of independent operation. The audio transmission system has the disadvantages that once any one device in one system fails, the system cannot work and only depends on the other system, and at the moment, if any one device in the other system fails, both systems cannot work, and the whole audio transmission system is completely broken down.
Meanwhile, the two systems are usually a digital system and an analog system, but due to the delay problem between the digital system and the analog system, the audio signals output by the two systems are asynchronous after being output by a loudspeaker; moreover, the analog system adopts a constant-voltage transmission mode, on one hand, a large number of cables for transmitting analog signals need to be laid, the requirement on the thickness of the wire diameter is high, and on the other hand, the analog signals are greatly attenuated in long-distance transmission in the cables, so that the tone quality of the audio signals is greatly influenced.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems occurring in the prior art.
Specifically, an object of the present invention is to provide an audio transmission system with higher reliability and stability, in which multiple levels of different cross backup devices are disposed between an active transmission system and a standby transmission system, so that even when multiple failure points at different positions occur simultaneously in two systems, audio signals can still bypass the multiple failure points to be normally transmitted.
The invention also aims to provide a two-way audio transmission system which can realize complete synchronization of two-way signals, has no time delay and almost no signal attenuation, the system adopts a parallel mode of two sets of digital systems, the equipment of a digital main transmission system and the equipment of a standby transmission system are completely the same, and the program setting is also the same, so the time delay is consistent, the signals of the loudspeakers can be ensured to be completely consistent, and the complete synchronization of the signals is ensured; and optical fiber transmission is adopted, one optical fiber can transmit hundreds of paths of original analog audio signals, the workload of cable laying is greatly saved, attenuation can be almost ignored in the optical signal transmission process, and the transmission quality of signals is greatly guaranteed.
Another objective of the present invention is to provide an audio transmission system with seamless automatic switching between dual networks, which has wider applicability and higher reliability, wherein two digital networks are used for transmission, the two digital networks are in a master-slave relationship and support two sets of systems at the same time, and a cross backup network switching device is arranged between the master transmission system and the backup transmission system, each set of system can realize seamless automatic switching between the two sets of networks, and when one network fails, an audio signal can still bypass the failure point to perform normal transmission; and meanwhile, a double backup power supply is adopted to ensure that the power supply supplies power normally. Therefore, the invention has higher reliability and stability than the prior audio transmission system, can adapt to various severe environments and different working conditions, and can still ensure the normal work of audio signals even if any system or one network fails.
In addition, another object of the present invention is to provide an audio transmission method with multi-level cross backup, so that the audio signal transmission has higher reliability and stability.
In order to achieve the purpose, the invention adopts the technical scheme that:
an audio transmission system with a multilevel cross backup framework comprises a microphone, a microphone distributor, a main transmission system and a backup transmission system, wherein an audio signal collected by the microphone is transmitted to the main transmission system and the backup transmission system through the microphone distributor; the main transmission system comprises a main digital sound console, a main digital audio processor, a main digital audio interface box and a main loudspeaker which are sequentially connected; the standby transmission system comprises a standby digital sound console, a standby digital audio processor, a standby digital audio interface box and a standby loudspeaker which are sequentially connected; the audio transmission system comprises a plurality of different cross backup devices arranged between the main transmission system and the standby transmission system and is used for realizing multi-level cross backup in audio signal transmission.
The microphones comprise a main microphone and a standby microphone, and sound signals collected by the main microphone and the standby microphone are transmitted to the microphone distributor; the microphone distributor serves as first-stage cross backup equipment, the audio signals from the main microphone are simultaneously distributed to the main digital sound console and the standby digital sound console, and the audio signals of the standby microphone are also simultaneously distributed to the main digital sound console and the standby digital sound console.
The second-level cross backup device is a signal processing cross backup device, and the signal processing cross backup device is arranged among the main digital sound console, the standby digital sound console, the main digital audio processor and the standby digital audio processor, and is used for receiving audio signals from the main digital sound console and the standby digital sound console and transmitting the audio signals to the main digital audio processor and the standby digital audio processor.
The third-level cross backup device is a cross backup network device, which is arranged between the main digital audio processor and the standby digital audio processor and the main digital interface box and the standby digital interface box, and is used for receiving audio signals from the main digital audio processor and the standby digital audio processor and transmitting the audio signals to the main digital audio interface box and the standby digital audio interface box.
The fourth-level cross backup device is an output terminal cross backup device, and the output terminal cross backup device is arranged among the main digital interface box, the standby digital interface box, the main loudspeaker and the standby loudspeaker, and is used for receiving audio signals from the main digital audio interface box and the standby digital audio interface box and transmitting the audio signals to the main loudspeaker and the standby loudspeaker.
The microphone distributor comprises one or more passive microphone distributors, the main microphone respectively and simultaneously outputs collected audio signals to the one or more passive microphone distributors, and the standby microphone respectively and simultaneously outputs the collected audio signals to the one or more passive microphone distributors.
The signal processing cross-backup apparatus includes an intelligent audio switcher and a passive line signal distributor connected to each other.
The cross backup network device comprises at least two optical fiber networks, wherein the optical fiber networks are independent from each other, and each optical fiber network is in star connection among the main digital audio processor, the standby digital audio processor, the main digital audio interface box and the standby digital audio interface box.
The output terminal cross backup device comprises a first intelligent audio switching module arranged in the main loudspeaker and a second intelligent audio switching module arranged in the standby loudspeaker.
A multi-level cross-backup audio transmission method, the method comprising:
a first cross backup step: simultaneously distributing the acquired audio signals to a main digital sound console and a standby digital sound console, and respectively processing the audio signals by the main digital sound console and the standby digital sound console;
a second cross backup step: the method comprises the steps that an audio signal output by a main digital sound console and an audio signal output by a standby digital sound console are selectively switched, the selected audio signals are simultaneously transmitted to a main digital audio processor and a standby digital audio processor, and the main digital audio processor and the standby digital audio processor respectively process the audio signals;
a third cross backup step: transmitting the audio signals processed by the main digital audio processor and the audio signals processed by the standby digital audio processor to a first network, transmitting the audio signals to a main digital audio interface box and a standby digital audio interface box through the first network, transmitting the audio signals processed by the main digital audio processor and the audio signals processed by the standby digital audio processor to a second network, and transmitting the audio signals to the main digital audio interface box and the standby digital audio interface box through the second network;
a fourth cross backup step: and the audio signal output by the main digital audio interface box and the audio signal output by the standby digital audio interface box are selectively switched, and the selected audio signals are simultaneously transmitted to the main loudspeaker and the standby loudspeaker.
The invention provides an audio transmission system with higher reliability and stability, wherein a plurality of levels of different cross backup devices are arranged between a main transmission system and a standby transmission system, so that even when a plurality of fault points at different positions appear in two sets of systems at the same time, audio signals can still bypass the fault points to be normally transmitted.
The invention also provides a two-way audio transmission system which can realize the complete synchronization of two-way signals, has no time delay and almost no signal attenuation, the system adopts a parallel mode of two sets of digital systems, the equipment of a digital main transmission system and a standby transmission system is completely the same, and the program setting is also the same, so the time delay is consistent, the complete consistency of the signals of the loudspeakers can be ensured, and the complete synchronization of the signals can be ensured; and optical fiber transmission is adopted, one optical fiber can transmit hundreds of paths of original analog audio signals, the workload of cable laying is greatly saved, attenuation can be almost ignored in the optical signal transmission process, and the transmission quality of signals is greatly guaranteed.
The invention also provides an audio transmission system with seamless automatic switching of double networks, which has wider applicability and higher reliability, wherein two digital networks are adopted for transmission, the two digital networks are in a main-standby relationship and simultaneously support two sets of systems, cross backup network switching equipment is arranged between the main transmission system and the backup transmission system, each set of system can realize seamless automatic switching on the two sets of networks, and when one network has a fault, an audio signal can still bypass a fault point to carry out normal transmission; and meanwhile, a double backup power supply is adopted to ensure that the power supply supplies power normally. Therefore, the invention has higher reliability and stability than the prior audio transmission system, can adapt to various severe environments and different working conditions, and can still ensure the normal work of audio signals even if any system or one network fails.
In addition, the invention also provides an audio transmission method of multi-level cross backup, so that the audio signal transmission has higher reliability and stability.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic diagram of an audio transmission system with a multi-level cross backup architecture according to the present invention.
Fig. 2A-2C are schematic diagrams of a first level cross-backup apparatus of an audio transmission system according to the present invention.
Fig. 3A-3C are schematic diagrams of a second level cross-backup device of an audio transmission system according to the present invention.
Fig. 4A-4D are schematic diagrams of a third level cross-backup apparatus of an audio transmission system according to the present invention.
Fig. 5A-5C are schematic diagrams of an embodiment of a fourth level cross backup device of an audio transmission system according to the invention.
Fig. 6 is a schematic diagram of another embodiment of a fourth stage cross backup device of an audio transmission system according to the present invention.
Fig. 7 is a flowchart of an audio transmission method according to the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It is to be understood that the terms "a" and "an" are to be interpreted as meaning that "at least one" or "one or more," i.e., that a single element may be present in one embodiment, while in other embodiments the element may be present in a plurality, and the terms "a" and "an" are not to be interpreted as limiting the number; the term "connected" is to be understood as "wirelessly connected" or "wired" and may be either "directly connected" or "indirectly connected", i.e. with or without other devices between the two devices being connected.
The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, numbers, steps, operations, components, elements, or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, elements, or groups thereof.
Fig. 1 is a schematic diagram of an audio transmission system with a multi-level cross backup architecture according to the present invention. As shown in fig. 1, the audio transmission system may include a plurality of microphones, a microphone distributor, a primary transmission system and a backup transmission system, wherein sound signals collected by the plurality of microphones are transmitted to the primary transmission system and the backup transmission system through the microphone distributor, respectively; the main transmission system comprises a main digital sound console, a main digital audio processor, a main digital audio interface box and a main loudspeaker which are sequentially connected; the standby transmission system comprises a standby digital sound mixing console, a standby digital audio processor, a standby digital audio interface box and a standby loudspeaker which are connected in sequence. In other embodiments, the active digital audio interface box and the standby digital audio interface box may also be replaced with an active digital power amplifier and a standby digital power amplifier, respectively, and then may be connected with a passive speaker.
Different from the traditional audio transmission system, the main transmission system and the standby transmission system both adopt digital systems, and the two systems work in parallel. Because the equipment of the digital main transmission system and the equipment of the standby transmission system are completely the same, and the program setting is also the same, the time delay is consistent, the signals reaching the loudspeakers can be ensured to be completely consistent, and the complete synchronization of the signals is ensured; and optical fiber transmission is adopted, one optical fiber can transmit hundreds of paths of original analog audio signals, the workload of cable laying is greatly saved, attenuation can be almost ignored in the optical signal transmission process, and the transmission quality of signals is greatly guaranteed.
The audio transmission system also comprises a multilevel cross backup device arranged between the main transmission system and the standby transmission system,
in one embodiment, referring to fig. 1, it is specifically shown that the audio transmission system may have four levels of cross-backup devices, including: the first level is signal source cross backup equipment which is positioned between the microphone and the main/standby digital sound console; the second level is signal processing cross backup equipment which is positioned between the main/standby digital sound console and the main/standby digital audio processor; the third level is signal transmission network cross backup equipment which is positioned between the main/standby digital audio processor and the main/standby digital audio interface box; the fourth stage is output terminal cross backup equipment which is positioned between the main/standby digital audio interface box and the main/standby loudspeaker.
The four-stage cross backup apparatus is described in detail below with reference to fig. 2A to 6.
The first-stage cross backup device is a signal source cross backup device and is mainly realized through a microphone distributor. Fig. 2A-2C are schematic diagrams illustrating a first level cross-backup appliance. Referring to fig. 1 and fig. 2A-2C, the microphones may be divided into at least two groups, such as a main microphone and a backup microphone, each group of microphones may include one or more microphones, and the two groups of microphones may collect a target sound and generate an audio signal. The microphone distributor may include two passive microphone distributors, and the audio signals collected by the two sets of microphones are output to the different passive microphone distributors respectively. The microphone distributor may simultaneously distribute the audio signals of the first group of microphones to the primary digital mixing console and the backup digital mixing console, and also simultaneously distribute the audio signals of the second group of microphones to the primary digital mixing console and the backup digital mixing console. Therefore, on one hand, the sound is collected by adopting a plurality of groups of microphones, so that the audio signal collected by the other group of microphones can be transmitted under the condition that one group of microphones fails; on the other hand, the two passive microphone distributors are adopted to distribute the audio signals, so that the other passive microphone distributor can still normally distribute the audio signals of the two groups of microphones under the condition that one passive microphone distributor fails; on the other hand, the microphone distributor simultaneously distributes the audio signals of the two groups of microphones to the main digital sound mixing console and the standby digital sound mixing console, so that the other digital sound mixing console can still work normally under the condition that one digital sound mixing console fails.
Furthermore, in another embodiment, the microphone splitters may also be implemented using one or more than two passive microphone splitters, depending on the number and grouping of microphones, and the use of two or more microphone splitters may further improve the reliability of the system, since if one of the microphone splitters fails, the other microphone splitters may still function properly.
The second-level cross backup device is a signal processing cross backup device and is mainly realized by an intelligent audio switcher and a passive signal distributor. Fig. 3A-3C are schematic diagrams illustrating a second level cross-backup appliance. With reference to fig. 1 and fig. 3A to 3C, the primary digital mixing console may include one or more digital mixing consoles, and the standby digital mixing console may also include one or more digital mixing consoles; the main/standby digital sound mixing console respectively converts the analog audio signals output by the microphone distributor into digital audio signals. Firstly, audio signals output by a main digital sound console are simultaneously transmitted to an intelligent audio switcher and a main digital audio processor, and audio signals output by a standby digital sound console are simultaneously transmitted to the intelligent audio switcher and the standby digital audio processor, so that the intelligent audio switcher can receive two paths of audio signals from the main digital sound console (namely, a path of signals A) and the standby digital sound console (namely, a path of signals B); then, the intelligent audio switcher automatically compares and selectively switches the two audio signals, specifically, if the absolute value of the level difference (| A-B |) of the two audio signals is smaller than a preset threshold value, which indicates that the two audio signals are basically consistent, the audio switcher defaults to adopt the A-path signal as the output audio signal, if once any one of the two audio signals is interrupted (no signal is received), or the absolute value of the level difference (| A-B |) of the two audio signals is larger than the preset threshold value, the intelligent audio switcher takes the one of the audio signals with the higher level value as the output audio signal, the automatic switching time is less than 10ms, the human ear can not sense the switching completely, and the seamless automatic switching is realized; then, the intelligent audio switcher outputs the selected audio signals after the comparison to the passive signal distributor; finally, the passive signal distributor distributes the audio signal to the main digital audio processor and the standby digital audio processor at the same time.
Here, the second-level cross-backup apparatus is implemented with only one set of an intelligent audio switcher and a passive signal distributor for cost saving and convenience of assembly. However, in other embodiments, two sets of intelligent audio switches and passive signal splitters may be used instead of the intelligent audio switch module shown in fig. 3A-3C, respectively, which operates in a similar manner to that shown in fig. 3A-3C, which has the advantage of further improving the reliability of the system because if one set of intelligent audio switches and passive signal splitters fails, the other set of intelligent audio switches and passive signal splitters still operate properly.
By using the second-level cross backup equipment, on one hand, under the condition that one digital sound console has a fault, the audio signals from the other digital sound console can still be simultaneously distributed to the main digital audio processor and the standby digital audio processor; on the other hand, under the condition that one digital audio processor fails, the other digital audio processor can still receive the audio signals transmitted by the main/standby digital sound console, so that the audio signals can still be transmitted to subsequent equipment.
The third-level cross backup device is a signal transmission network cross backup device and is mainly realized by two digital networks and a switch system thereof. Fig. 4A-4D are schematic diagrams illustrating a third level cross-backup appliance. With reference to fig. 1 and 4A-4D, the active digital audio processor may include one or more digital audio processors, and the standby digital audio processor may also include one or more digital audio processors, which are configured to process audio signals from the active/standby digital mixing console. In the third-level cross backup device, the audio signal is transmitted through an optical fiber network, the optical fiber network comprises two networks, namely an a network and a B network, the two networks are respectively provided with respective switch systems, and each switch system can comprise one or more switches. The main/standby digital audio processor performs processing such as gain, equalization, delay, voltage limit and the like on the audio signals, the processing programs of the main/standby digital audio processor are completely consistent, and the processed audio signals are completely the same digital audio signals; then, the main digital audio processor transmits the processed audio signals to an A network and a B network at the same time, one path of signals is transmitted to a main digital audio interface box and a standby digital audio interface box through the A network and an exchanger system thereof, and the other path of signals is transmitted to the main digital audio interface box and the standby digital audio interface box through the B network and an exchanger system thereof; meanwhile, the standby digital audio processor also transmits the processed audio signals to the A network and the B network at the same time, one path of signals is transmitted to the main digital audio interface box and the standby digital audio interface box through the A network and the switch system thereof, and the other path of signals is transmitted to the main digital audio interface box and the standby digital audio interface box through the B network and the switch system thereof. The main digital audio interface box and the standby digital audio interface box are both provided with intelligent audio switching units, the functions of which are similar to the functions of the intelligent audio switcher in the second-level cross backup equipment, and the intelligent audio switching units are used for respectively comparing and selectively switching the received audio signals and outputting the selected audio signals.
The main/standby digital audio processor, the main/standby digital audio interface box and other devices are connected in a star-shaped manner through the switch system and the optical fiber network, so that digital audio signals supporting the DANTE and Q-LAN protocols are interconnected and communicated among the devices, and the devices support a dual-network seamless automatic switching mechanism.
In this way, with the third level cross-backup device, audio signals are transmitted through the fiber optic twin network and switch system, the following three advantages are obtained: firstly, in the case of failure of one of the digital audio processors, the other digital audio processor can still process and transmit the audio signal; secondly, the two optical fiber networks are adopted to transmit the audio signals in parallel, so that the other network can still normally transmit the audio signals processed by the digital audio processor under the condition that one network fails; thirdly, the audio signals processed by the main/standby audio processor are simultaneously transmitted to the main digital audio interface box and the standby digital audio interface box through the dual network, so that the other digital audio interface box can still work normally under the condition that one digital audio interface box fails.
The fourth-level cross backup device is an output terminal cross backup device, and in one embodiment, the output terminal cross backup device is mainly implemented by an intelligent audio switching module built in a speaker, as shown in fig. 5A to 5C. Fig. 5A-5C are schematic diagrams illustrating one embodiment of a fourth level cross backup apparatus. With reference to fig. 1 and fig. 5A-5C, the active digital audio interface box may include one or more digital interface boxes, and the standby digital audio interface box may also include one or more digital audio interface boxes, where the active/standby digital audio interface box converts a received digital audio signal into an analog audio signal, and outputs the analog audio signal to the active/standby speaker through the intelligent audio switching module. Specifically, the fourth-stage cross backup device may include two sets of intelligent audio switching modules, where the first set of intelligent audio switching modules is embedded in the main speaker, and the second set of intelligent audio switching modules is embedded in the standby speaker.
The main digital audio interface box simultaneously outputs the processed audio signals to the first group of intelligent audio switching modules and the second group of intelligent audio switching modules, and the standby digital audio interface box also simultaneously outputs the processed audio signals to the first group of intelligent audio switching modules and the second group of intelligent audio switching modules, namely, the first group of intelligent audio switching modules and the second group of intelligent audio switching modules both receive two paths of audio signals, including the main audio signals and the standby audio signals; then, the first group and the second group of intelligent audio switching modules respectively compare and selectively switch the two audio signals, specifically, if the absolute value of the level difference (| A-B |) of the two audio signals is smaller than a preset threshold value, which indicates that the two audio signals are basically consistent, the default is to adopt the A-path signal as the output audio signal, and if once any one of the two audio signals is interrupted (no signal is received), or the absolute value of the level difference (| A-B |) of the two audio signals is larger than the preset threshold value, the intelligent audio switcher takes the one of the audio signals with the higher level value as the output audio signal; and finally, the first group of intelligent audio switching modules transmits the selected audio signals to the main loudspeaker, the second group of intelligent audio switching modules transmits the selected audio signals to the standby loudspeaker, and the main loudspeaker and the standby loudspeaker play the audio signals.
In this way, in the fourth-level cross backup device, on one hand, by adopting two groups of intelligent audio switching modules to transmit audio signals, it can be ensured that under the condition that one group of intelligent audio switching modules fails, the other group of intelligent audio switching modules can still normally transmit and switch audio signals from the main digital audio interface box and the standby digital audio interface box; on the other hand, when the transmission fault of the main/standby audio signal occurs, the intelligent audio switching module can automatically switch the main and standby audio signals, the switching time is less than 10ms, and the switching time can not be completely sensed by human ears, thereby realizing the seamless automatic switching of the audio signals; finally, the main loudspeaker and the standby loudspeaker are adopted to simultaneously receive the audio signals from the two groups of intelligent audio switching modules, so that the other loudspeaker can still work normally under the condition that one loudspeaker fails, and the normal sound amplification of the audio transmission system is realized.
In another embodiment, the fourth-level cross backup apparatus may also be implemented by a single intelligent audio switching apparatus, and fig. 6 schematically illustrates a schematic diagram of another embodiment of the fourth-level cross backup apparatus of the present invention. In this case, the intelligent audio switching apparatus may include an intelligent audio switcher and a passive signal distributor connected to each other, except that the intelligent audio switching module built in the speaker is replaced with a separate intelligent audio switcher and passive signal distributor. In this embodiment, as shown in fig. 6, the main digital audio interface box is connected to the main speaker and the intelligent audio switcher at the same time, and the standby digital audio interface box is connected to the standby speaker and the intelligent audio switcher at the same time; under normal conditions, the main digital audio interface box directly outputs one path of signal to the main loudspeaker, meanwhile, one path of audio signal output by the standby digital audio interface box is transmitted to the main loudspeaker through the intelligent audio switcher and the passive signal distributor, and a sound mixing module in the main loudspeaker performs sound mixing output on the two paths of signals; the standby digital audio interface box directly outputs another path of signal to the standby loudspeaker, meanwhile, the other path of signal output by the main digital audio interface box is transmitted to the standby loudspeaker through the audio signal of the intelligent audio switcher and the passive signal distributor, and the sound mixing module in the standby loudspeaker performs sound mixing output on the two paths of signal. Here, the fourth level cross-backup apparatus is implemented with only one set of an intelligent audio switcher and a passive signal distributor for cost saving and convenience of assembly. However, in other embodiments, two sets of intelligent audio switches and passive signal splitters may be used instead of the intelligent audio switch modules shown in fig. 5A-5C, respectively, which operate in a similar manner to fig. 5A-5C, which has the advantage of further improving the reliability of the system because if one set of intelligent audio switches and passive signal splitters fails, the other set of intelligent audio switches and passive signal splitters still operate properly.
Adopt the intelligent audio frequency switching equipment of peripheral hardware to realize fourth level cross backup device, compare in placing the speaker in with intelligent audio frequency switching module in has following advantage:
1. the intelligent audio switching equipment is separated from the loudspeaker, so that mutual interference between signals is avoided;
2. because the intelligent audio switching equipment does not depend on the power supply of the loudspeaker, when the power supply of the loudspeaker breaks down, the normal work of the intelligent audio switching equipment cannot be influenced. That is, when the intelligent audio switching device and either speaker fail, the audio signal can still be transmitted to the other speaker.
3. The intelligent audio switching equipment and the loudspeaker are arranged in a separated mode, and the intelligent audio switching equipment or the loudspeaker can be maintained and replaced independently.
But adopt the mode of placing intelligence audio frequency switch module in the speaker in, its advantage then lies in: need not lay extra cable and connect intelligent audio frequency switching equipment and speaker, simplified the equipment connection, the equipment of being convenient for, simultaneously because the cost of built-in module is lower relatively, can also save the cost.
In addition, on the basis of the audio transmission system, referring to fig. 7, the present invention further provides an audio transmission method with multi-level cross backup, which includes the steps of:
a signal acquisition step: collecting sound through a microphone and converting the sound into an audio signal;
a first cross backup step: simultaneously distributing the acquired audio signals to a main digital sound console and a standby digital sound console, and respectively processing the audio signals by the main digital sound console and the standby digital sound console;
a second cross backup step: the method comprises the steps that an audio signal output by a main digital sound console and an audio signal output by a standby digital sound console are selectively switched, the selected audio signals are simultaneously transmitted to a main digital audio processor and a standby digital audio processor, and the main digital audio processor and the standby digital audio processor respectively process the audio signals;
a third cross backup step: transmitting the audio signals processed by the main digital audio processor and the audio signals processed by the standby digital audio processor to a first network, transmitting the audio signals to a main digital audio interface box and a standby digital audio interface box through the first network, transmitting the audio signals processed by the main digital audio processor and the audio signals processed by the standby digital audio processor to a second network, and transmitting the audio signals to the main digital audio interface box and the standby digital audio interface box through the second network;
a fourth cross backup step: and the audio signal output by the main digital audio interface box and the audio signal output by the standby digital audio interface box are selectively switched, and the selected audio signals are simultaneously transmitted to the main loudspeaker and the standby loudspeaker.
A playing step: the audio signal is played through the primary speaker and/or the backup speaker.
The invention provides an audio transmission system with higher reliability and stability, wherein a plurality of levels of different cross backup devices are arranged between a main transmission system and a standby transmission system, so that even when a plurality of fault points at different positions appear in two sets of systems at the same time, audio signals can still bypass the fault points to be normally transmitted.
The invention also provides a two-way audio transmission system which can realize the complete synchronization of two-way signals, has no time delay and almost no signal attenuation, the system adopts a parallel mode of two sets of digital systems, the equipment of a digital main transmission system and a standby transmission system is completely the same, and the program setting is also the same, so the time delay is consistent, the complete consistency of the signals of the loudspeakers can be ensured, and the complete synchronization of the signals can be ensured; and optical fiber transmission is adopted, one optical fiber can transmit hundreds of paths of original analog audio signals, the workload of cable laying is greatly saved, attenuation can be almost ignored in the optical signal transmission process, and the transmission quality of signals is greatly guaranteed.
The invention also provides an audio transmission system with seamless automatic switching of double networks, which has wider applicability and higher reliability, wherein two digital networks are adopted for transmission, the two digital networks are in a main-standby relationship and simultaneously support two sets of systems, cross backup network switching equipment is arranged between the main transmission system and the backup transmission system, each set of system can realize seamless automatic switching on the two sets of networks, and when one network has a fault, an audio signal can still bypass a fault point to carry out normal transmission; and meanwhile, a double backup power supply is adopted to ensure that the power supply supplies power normally. Therefore, the invention has higher reliability and stability than the prior audio transmission system, can adapt to various severe environments and different working conditions, and can still ensure the normal work of audio signals even if any system or one network fails.
The invention is described above by taking a four-level cross backup device as an example, but the invention is not limited thereto, and some of the embodiments may also be implemented by selecting only one, two, or three levels; in other embodiments, if more intermediate transmission devices are included, more than four levels of cross backup devices may be provided. In addition, each stage of the cross backup devices of each stage described in the present invention can be implemented as one (or one group) or multiple (or multiple groups) of the same cross backup devices, and when each stage uses two or more cross backup devices, the reliability of the system can be further improved, because if one of the cross backup devices fails, the other cross backup devices can still work normally, thereby ensuring that the cross backup function is not affected.
In addition, the invention also provides an audio transmission method of multi-level cross backup, so that the audio signal transmission has higher reliability and stability.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. An audio transmission system with a multilevel cross backup framework comprises a microphone, a microphone distributor, a main transmission system and a backup transmission system, wherein an audio signal collected by the microphone is transmitted to the main transmission system and the backup transmission system through the microphone distributor; the main transmission system comprises a main digital sound console, a main digital audio processor, a main digital audio interface box and a main loudspeaker which are sequentially connected; the standby transmission system comprises a standby digital sound console, a standby digital audio processor, a standby digital audio interface box and a standby loudspeaker which are sequentially connected; the audio transmission system comprises a plurality of different cross backup devices arranged between a main transmission system and a standby transmission system and is used for realizing multi-level cross backup in audio signal transmission;
the microphones comprise a main microphone and a standby microphone, and the plurality of different cross backup devices comprise four-stage cross backup devices;
the first-stage cross backup device is a signal source cross backup device and is positioned among the main microphone, the standby microphone, the main digital sound console and the standby digital sound console;
the second-level cross backup device is a signal processing cross backup device and is positioned between the main digital sound console and the standby digital sound console and between the main digital audio processor and the standby digital audio processor;
the third-level cross backup device is a signal transmission network cross backup device and is positioned between the main digital audio processor and the standby digital audio processor and the main digital interface box and the standby digital interface box;
the fourth-level cross backup device is an output terminal cross backup device and is positioned between the main digital interface box and the standby digital interface box and the main loudspeaker and the standby loudspeaker;
sound signals collected by the main microphone and the standby microphone are transmitted to the microphone distributor; the microphone distributor is used as a first-stage cross backup device, and is used for simultaneously distributing the audio signals from the main microphone to the main digital sound console and the standby digital sound console and simultaneously distributing the audio signals from the standby microphone to the main digital sound console and the standby digital sound console;
the microphone distributors comprise one or more passive microphone distributors, the main microphone respectively outputs the collected audio signals to the one or more passive microphone distributors, and the standby microphone respectively outputs the collected audio signals to the one or more passive microphone distributors;
the second-level cross backup device is used for receiving audio signals from the main digital sound console and the standby digital sound console, comparing the two paths of audio signals to perform selection switching, and transmitting the selected audio signals to the main digital audio processor and the standby digital audio processor;
the third-level cross backup device is used for receiving audio signals from the main digital audio processor and the standby digital audio processor and transmitting the audio signals to the main digital audio interface box and the standby digital audio interface box;
the fourth-stage cross backup device is used for receiving the audio signals from the main digital audio interface box and the standby digital audio interface box, comparing the two audio signals to perform selection switching, and transmitting the selected audio signals to the main loudspeaker and the standby loudspeaker.
2. The audio transmission system according to claim 1, wherein: the signal processing cross-backup apparatus includes an intelligent audio switcher and a passive line signal distributor connected to each other.
3. The audio transmission system according to claim 1, wherein: the signal transmission network cross backup device comprises at least two optical fiber networks, wherein the optical fiber networks are independent from each other, and each optical fiber network is in star connection among the main digital audio processor, the standby digital audio processor, the main digital audio interface box and the standby digital audio interface box.
4. The audio transmission system according to claim 1, wherein: the output terminal cross backup device comprises a first intelligent audio switching module arranged in the main loudspeaker and a second intelligent audio switching module arranged in the standby loudspeaker.
5. An audio transmission method employing the multi-level cross-backup of the audio transmission system of claim 1, the method comprising:
a first cross backup step: simultaneously distributing the acquired audio signals to a main digital sound console and a standby digital sound console, and respectively processing the audio signals by the main digital sound console and the standby digital sound console;
a second cross backup step: the method comprises the steps that an audio signal output by a main digital sound console and an audio signal output by a standby digital sound console are selectively switched, the selected audio signals are simultaneously transmitted to a main digital audio processor and a standby digital audio processor, and the main digital audio processor and the standby digital audio processor respectively process the audio signals;
a third cross backup step: transmitting the audio signals processed by the main digital audio processor and the audio signals processed by the standby digital audio processor to a first network, transmitting the audio signals to a main digital audio interface box and a standby digital audio interface box through the first network, transmitting the audio signals processed by the main digital audio processor and the audio signals processed by the standby digital audio processor to a second network, and transmitting the audio signals to the main digital audio interface box and the standby digital audio interface box through the second network;
a fourth cross backup step: and the audio signal output by the main digital audio interface box and the audio signal output by the standby digital audio interface box are selectively switched, and the selected audio signals are simultaneously transmitted to the main loudspeaker and the standby loudspeaker.
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| CN111653286A (en) * | 2019-12-31 | 2020-09-11 | 广州励丰文化科技股份有限公司 | Hot backup method of audio signal and audio equipment |
| CN113922904B (en) * | 2021-10-10 | 2023-05-16 | 广州追梦软件技术有限公司 | Sound console data backup and switching method based on double controllers |
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