WO2021110167A1 - 自组网级联方法、音频采集设备、会议系统、存储介质 - Google Patents
自组网级联方法、音频采集设备、会议系统、存储介质 Download PDFInfo
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- WO2021110167A1 WO2021110167A1 PCT/CN2020/134265 CN2020134265W WO2021110167A1 WO 2021110167 A1 WO2021110167 A1 WO 2021110167A1 CN 2020134265 W CN2020134265 W CN 2020134265W WO 2021110167 A1 WO2021110167 A1 WO 2021110167A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
- H04N7/155—Conference systems involving storage of or access to video conference sessions
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- the present invention relates to the field of communication, in particular to an ad hoc network cascading method, audio acquisition equipment, video conference system, and computer readable storage medium.
- a video conference is a real-time, two-way or multi-party video communication conference held by a video conference terminal device and a video conference multipoint control unit (MCU).
- the microphone is an important device of the audio system in the video conference.
- Most video conference systems are externally connected to the video conference terminal with a microphone for audio collection and audio processing.
- a microphone cascade technology combining multiple microphones has been developed.
- the existing microphone cascades are all based on wires.
- one of the microphones is used as the main device to connect to the video conference terminal, and the other microphones are used as sub-devices to connect to the main device.
- the video conference is also interrupted, and the user needs to connect the main device with the video conference terminal again using a network cable, thereby affecting the user experience in the video conference.
- embodiments of the present invention provide an ad hoc network cascading method, audio collection equipment, video conference system, and computer-readable storage medium.
- an embodiment of the present invention provides an ad hoc network cascading method, which is applied to an audio collection device.
- the method includes: judging whether a main device currently exists; Other audio collection devices send election broadcast information; if the election broadcast information of other audio collection devices in the same group is not received within the first period of time after the election broadcast information is sent, it is sent to other audio collection devices in the same group The main device broadcasts information.
- an embodiment of the present invention provides an audio collection device, including: a sound collection unit, a memory, and a processor, the memory stores a computer program, and the above implementation is implemented when the computer program is executed by the processor The method in the example.
- an embodiment of the present invention provides a video conference system, including a video conference terminal and the audio collection device in the above-mentioned embodiments, and the audio collection device is configured to perform a wireless communication connection with the video conference terminal.
- an embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed, the method in the foregoing embodiment is implemented.
- Figure 1 is a schematic diagram of multiple microphones cascaded
- FIG. 2 is a schematic diagram of an ad hoc network cascading method provided by an embodiment of the present invention
- FIG. 3 is a schematic diagram of another ad hoc network cascading method provided by an embodiment of the present invention.
- Fig. 4 is a schematic diagram of pairing and binding of the audio collection device with the video conference terminal for the first time
- FIG. 5 is a schematic diagram of pairing and binding between the audio collection device and the video conference terminal for the Nth time in the embodiment of the present invention.
- Fig. 6 is a schematic diagram of the audio collection device switching between multiple states in an embodiment of the present invention.
- multiple microphones are cascaded. Specifically, one of the microphones is selected as the main device, and the remaining microphones are used as sub-devices, and the main device is connected to the video conference terminal, and the sub-devices are connected to the main device. .
- the microphone MIC1 is the main device, and the microphones MIC2 and MIC3 are the sub-devices.
- the microphones MIC2 and MIC3 send the collected audio to the microphone MIC1.
- the microphone MIC1 collects the audio collected by itself and the received sub-devices. After the audio is processed, it is sent to the video conference terminal.
- the cascading of microphones is based on a wired manner, for example, a data cable or a network cable is used to connect multiple microphones.
- a data cable or a network cable is used to connect multiple microphones.
- an ad hoc network cascading method is provided, which is applied to an audio collection device, and the audio collection device may be a microphone, specifically a digital microphone.
- Fig. 2 is a schematic diagram of an ad hoc network cascading method provided by an embodiment of the present invention. As shown in Fig. 2, the ad hoc network cascading method includes:
- the audio collection device judges whether there is a master device currently, and if it is judged that there is no master device, proceed to step S12: the audio collection device sends election broadcast information to other audio collection devices in the same group, that is, this audio collection device Enter the campaign state.
- this audio collection device does not receive the election broadcast information of other audio collection devices within the first time period after sending the election broadcast information, it indicates that no other audio collection devices in the same group participate in the election. At this time, proceed to step S13: this audio The collection device sends the main device broadcast information to other audio collection devices in the same group, that is, the audio collection device serves as the main device to receive the audio data of each sub-device, and the main device combines the data collected by itself and the audio data collected by the sub-devices. After processing, it is sent to the video conference terminal.
- the video conference terminal can be paired and bound with multiple audio collection devices, and the same video conference terminal and the audio collection devices bound to the video conference terminal become a group.
- the main device broadcast information is the information sent by the main device, which is used to indicate that the main device exists in the network, that is, if an audio collection device receives the main device broadcast information, it can be determined that the main device exists in the current network.
- the main device and the sub-devices are both audio collection devices (ie, microphones).
- the main device serves as a voice processing center.
- the audio data collected by the main device and the received audio data collected by each sub-device are processed and sent.
- the master device can periodically send out the master device broadcast information.
- the main device broadcast information and the election broadcast information are both broadcast and transmitted in a wireless manner.
- the audio collection device is the main body of execution of the ad hoc network cascade method, and other audio collection devices in the same group refer to other audio collection devices in the same group except the audio collection device.
- the main device is an audio collection device in the first specific state. When the audio collection device is in the first specific state, it processes the audio collected by itself and the audio collected by the received sub-devices and sends them to the video conference terminal.
- the sub device is an audio collection device in the second specific state, and the audio collection device is in the second specific state and sends the collected audio to the main device.
- the audio collection device may become a main device or a sub-device.
- the user selects an audio capture device as the main device, and uses a data cable or network cable to connect the main device to the video conference terminal, and uses the data cable or network cable to connect other audio capture devices to the main device. connection. After the connection is completed, the main device is fixed. Once the main device is disconnected from the video conference terminal due to transmission failure or other factors, the video conference process is also interrupted, and the user is required to connect the main device to the video conference terminal again.
- the audio collection device can send election broadcast information to other audio collection devices in the same group, thereby entering the election state. If after entering the election state, there is no other audio collection device for the first period of time for election, then this audio collection device automatically becomes the master device. Therefore, in the video conference system, once the main device fails, for any other audio collection device, the audio collection device will detect that there is no main device currently, and enter the election state, and then when there is no other audio The collection device automatically becomes the main device during the election, which can prevent the video conference from being interrupted for a long time, and does not require the user to manually connect the audio collection device and the video conference terminal, thereby improving the user experience.
- Fig. 3 is a schematic diagram of another ad hoc network cascading method provided by an embodiment of the present invention. As shown in Fig. 3, the ad hoc network cascading method includes:
- Step S20 The audio collection device judges whether there is a master device currently, and if the audio collection device judges that there is a master device, the following step S21 is performed. If the audio collection device determines that there is no master device, the following step S22 is performed.
- step S20 includes: the audio collection device determines whether the main device broadcast information is received within the third time period; if the audio collection device receives the main device broadcast information within the third time period, it is determined that the main device exists; If the device does not receive the main device broadcast information within the third time period, it is determined that there is no main device.
- the third duration may be twice the broadcast period of the main device.
- the third duration is 2 seconds.
- Step S21 The audio collection device automatically serves as a sub-device, so that the collected audio data is sent to the main device.
- Step S22 The audio collection device broadcasts a campaign message to other audio collection devices in the same group, that is, the audio collection device enters a campaign state.
- step S22 if the audio collection device does not receive election broadcast information from other audio collection devices within the first time period, the following step S23a is performed.
- Step S23a The audio collection device becomes the master device and sends the broadcast information of the master device, so that other audio collection devices determine that the master device currently exists.
- the audio collection device can also send its device number and status information to the video conference terminal, so that the video conference terminal can obtain the current master device information.
- step S22 if the audio collection device receives the main device broadcast information within the first time period, the following step S24a is performed.
- the first duration can be set according to actual needs. When the value of the first duration is too large, the entire cascading process will be slower. When the value of the first duration is too small, the cost may occur. The audio capture device has not been able to receive the broadcast information of the main device, resulting in errors in the cascading process.
- the first duration may be 800 milliseconds.
- Step S24a The audio collection device becomes a sub-device.
- step S22 if the audio collection device receives election broadcast information of other audio collection devices in the same group within the second time period, the following step S25a is performed.
- Step S25a The audio collection device judges whether to participate in the election according to the preset rules. If it is determined to participate in the election, it returns to step S22; if the election is abandoned, the following step S25b is performed. Among them, the judgment result of judging whether to participate in the election according to the preset rules has a certain randomness.
- Step S25b The audio collection device enters the abandonment state.
- the abandonment state if the election broadcast information of other audio collection devices or the main device broadcast information is received within the second time period, the audio collection device becomes a sub-device; If no election broadcast information or master device information is received within the second period of time, return to step S25a. That is, after the audio collection device determines to abandon the election, there are multiple other audio collection devices still in the election state, then the audio collection device is used as a sub-audio collection device; or, there are only two audio collection devices in the same group, if The audio collection device abandons the election, and the other audio collection device becomes the main device autonomously, so that the audio collection device receives the broadcast information of the main device. At this time, the audio collection device autonomously becomes a sub-device.
- the second duration can be set according to actual needs.
- the value of the second duration is too large, the entire cascade process will be slower.
- the value of the second duration is too small, the cost may occur.
- the audio collection equipment has been unable to receive election broadcast information or the main equipment broadcast information, resulting in errors in the cascading process.
- the second duration may be 800 milliseconds.
- the preset rule includes: using a preset algorithm to perform an operation on the random seed to obtain the first operation result or the second operation result.
- the first calculation result indicates participation in the election
- the second calculation result indicates the abandonment of the election.
- a preset algorithm is used to calculate a random seed, and a result of 0 or 1 is obtained.
- the system time can be used as a random seed.
- the probability of the audio collection device participating in the election is 0.5.
- the audio collection device can send the following three types of signaling: DMCI_DMIC_MAIN_BROADCAST signaling, DMIC_DMIC_ELECTION signaling, and DMIC_DMIC_ASK_MAIN.
- the DMCI_DMIC_MAIN_BROADCAST signaling is used as the above-mentioned main device broadcast information, and the audio collection device that sends the signaling is the main device or may be the main device, and periodically broadcasts to notify all audio collection devices.
- the DMIC_DMIC_ELECTION signaling is used as election information, and the audio collection device sending this signaling is in the election state. If the audio collection device has just been paired and bound with the video conference terminal, or the main device information has not been received for a long time, the DMIC_DMIC_ASK_MAIN signaling can be sent.
- each audio collection device When each audio collection device is powered on, it is in an independent working state. If it is disconnected from the network and reconnected, it is also in this state. After that, each audio collection device is in this state according to its current state and the received main device broadcast information or campaign broadcast information , Automatically becomes the main device or sub-device, so that only one audio collection device in the same group is the main device, and other audio collection devices become sub-devices. The main device periodically broadcasts to maintain the topology between the sub-devices.
- the audio collection device if it does not receive the master device information within the third time period, it enters the election state. If after entering the election state, there is no other audio collection device for the first period of time for election, then this audio collection device will automatically become the main device; if after entering the election state, there are other audio collection devices for the first period of time for the election, then this audio The collection device calculates whether to participate in the election according to preset rules.
- the audio collection device decides to abandon the election and other audio collection devices participate in the election, the audio collection device will automatically act as a sub-audio device; otherwise, the audio collection device will enter the election state again , And then calculate again whether to participate in the election, until it is determined whether the audio collection device is the main device or the sub-device.
- multiple audio collection devices can automatically run for the main device, thereby establishing a cascading relationship. Therefore, in the video conference system, there is no need for users to use network cables. Two audio capture devices are cascaded to improve user experience.
- the ad hoc network cascading method further includes the following steps performed before step S20: the audio collection device is paired and bound with the video conference terminal.
- the video conference terminal can be paired and bound with multiple audio collection devices, and the multiple audio collection devices paired and bound with the same video conference terminal belong to the same group.
- Fig. 4 is a schematic diagram of pairing and binding of the audio collection device with the video conference terminal for the first time. As shown in Figure 4, the steps of pairing and binding the audio collection device with the video conference terminal for the first time include:
- the audio collection device sends a discovery DHCPDISCOVER message to the video conference terminal.
- the video conference terminal judges the number of currently bound audio collection devices. If the number of currently bound audio collection devices reaches the preset number (for example, three), set a timeout period Put it in a deny DHCPNACK message for sending; if the number of currently bound audio collection devices is less than the preset number, the video conference terminal selects the appropriate device number DepID and puts it in the assigned DHCPOFFER message for sending.
- the video conference terminal can also use the MAC address of the external network port to generate the group number GroupID, and add the GroupID to the DHCPOFFER message.
- the audio collection devices in the same group can send messages to each other through the GroupID.
- the audio collection device sends a first request DHCPREQUEST message to the video conference terminal.
- the first DHCPREQUEST message includes the DepID selected by the audio collection device, and the first DHCPREQUEST message is used at least for the request Use DepID. If for some reason, the audio capture device may receive multiple DHCPOFFER messages, in this case, the audio capture device can send the first DHCPREQUEST message when it receives the first DHCPOFFER message.
- the video conference terminal After the video conference terminal receives the first DHCPREQUEST message, it determines whether the audio collection device has selected the DepID provided by the video conference terminal, and if so, the video conference terminal sends the first confirmation DHCPACK message.
- the audio collection device If the audio collection device receives the first DHCPACK message, the audio collection device switches to the pairing and binding Bound state, that is, the audio collection device is bound to the video conference terminal. In the Bound state, the audio collection device can use DepID to send audio data.
- FIG. 5 is a schematic diagram of the pairing and binding of the audio collecting device with the video conference terminal for the Nth time in the embodiment of the present invention. As shown in FIG. 5, the step of pairing and binding the audio collecting device with the video conference terminal for the Nth time includes :
- the audio collection device sends a second DHCPREQUEST message to the video conference terminal.
- the second DHCPREQUEST message is at least used to request the DepID used for the N-1th pairing and binding again, where N is an integer greater than 1.
- the video conference terminal After receiving the second DHCPREQUEST message, the video conference terminal sends the second DHCPACK message or the second DHCPNACK message.
- the audio collection device receives the second DHCPACK message, it will pair and bind the audio collection device with the video conference terminal again.
- FIG. 6 is a schematic diagram of the audio collection device switching between multiple states in the embodiment of the present invention.
- the audio collection device sends a DHCPDISCOVER message to enter the Selecting state.
- the Init state is the initial state when the audio collection device is paired and bound with the video conference terminal for the first time.
- the Selecting state when the audio capture device receives the DHCPOFFER message, it sends the first DHCPREQUEST message, thereby entering the Requesting state.
- the Requesting state if the audio capture device receives the first DHCPACK message, it switches to the Bound state; if the audio capture device receives the first DHCPNACK message, it switches to the Init state.
- the first DHCPNACK message includes: the lease time for allowing the audio collection device to use the device number.
- the step of pairing and binding with the video conference terminal further includes: the audio collection device determines the first time and the second time according to the lease time in the first DHCPNACK message. If the audio capture device uses DepID for the first time, it enters the Renewing state. At this time, the audio capture device requests to bind with the video conference terminal again, thereby sending a second DHCPREQUEST message to the video conference terminal.
- the DHCPREQUEST message includes the DepID used in the previous pairing and binding, that is, the DepID currently in use.
- the video conference terminal After receiving the second DHCPREQUEST message, the video conference terminal sends the second DHCPACK message or the second DHCPNACK message. If the audio capture device receives the second DHCPACK message before the use time of the device number reaches the second time, the audio capture device enters the Bound state again, and recounts the use time of the DepID. If the audio collection device receives the second DHCPNACK message, it switches to the Init state. If the audio capture device does not receive any reply from the video conference terminal, it will send the second DHCPREQUEST message again when the DepID usage time reaches the second time. Similarly, if the audio capture device receives the second DHCPACK message, then Enter the Bound state; if the audio capture device receives the second DHCPNACK message, it switches to the Init state.
- the first time may be half of the lease time
- the second time may be 0.75 to 0.9 times the lease time
- the audio capture device In the Bound state, if the audio capture device receives a shutdown instruction or a sleep instruction, it sends a release message to the video conference terminal to enter the Init state.
- the audio collection device sends a second DHCPREQUEST message to the video conference terminal, thereby entering the Rebooting state during restart.
- the video conference terminal After receiving the second DHCPREQUEST message, the video conference terminal sends a second DHCPACK message or a second DHCPNACK message. If the audio capture device receives the second DHCPACK message, it enters the Bound state; if the audio capture device receives the second DHCPNACK message, it enters the Init state.
- each audio collection device automatically becomes the main device or the sub-device through the process of FIG. 2. After that, the sub-device sends the collected audio data to the main device, and the main device processes the audio data collected by itself and the audio data sent by the sub-device and sends them to the video conference terminal.
- an audio collection device which includes: a sound collection unit, a memory, and a processor.
- a computer program is stored in the memory. When the computer program is executed by the processor, The ad hoc network cascading method in the embodiment.
- a video conference system which includes a video conference terminal and an audio collection device, and the audio collection device is used for wireless communication connection with the video conference terminal.
- the audio collection device is a microphone, and specifically may be a digital microphone.
- a computer-readable storage medium on which a computer program is stored, and when the computer program is executed, the ad hoc network cascading method in the foregoing embodiment is implemented.
- the audio collection device can send election broadcast information to other audio collection devices in the same group, thereby entering the election state. If after entering the election state, there is no other audio collection device for the first period of time for election, then this audio collection device automatically becomes the master device. Therefore, once the main device fails, for any other audio capture device, the audio capture device will detect that there is no main device currently, and enter the election state, and then automatically when there is no other audio capture device for the election. Become the main device, which can prevent the video conference from being interrupted for a long time, and does not require the user to manually connect the audio capture device and the video conference terminal, thereby improving the user experience.
- Such software may be distributed on a computer-readable medium
- the computer-readable medium may include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium).
- the term computer storage medium includes volatile and non-volatile memory implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data).
- Information such as computer-readable instructions, data structures, program modules, or other data.
- Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassette, tape, magnetic disk storage or other magnetic storage device, or Any other medium used to store desired information and that can be accessed by a computer.
- a communication medium usually contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium. .
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Abstract
本发明实施例提供一种自组网级联方法、音频采集设备、视频会议系统、计算机可读存储介质。该自组网级联方法应用于音频采集设备，并包括：判断当前是否存在主设备（S11）；若判断出不存在主设备，则向同一组内的其他音频采集设备发送竞选广播信息（S12）；若在发送所述竞选广播信息之后的第一时长内未接收到其他音频采集设备的竞选广播信息，则向同一组内的其他音频采集设备发送主设备广播信息（S13）。
Description
相关申请的交叉引用
本申请基于申请号为201911241246.7、申请日为2019年12月6日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
本发明涉及通信领域，具体涉及一种自组网级联方法、音频采集设备、视频会议系统、计算机可读存储介质。
视频会议是通过视频会议终端设备和视频会议多点控制单元(Multi Control Unit，简称MCU)来召开的实时、双向或多方视频通讯会议。麦克风是视频会议中音频系统的重要设备，大多数视频会议系统都是在视频会议终端外接一个麦克风，用于音频采集以及音频处理。
随着网络技术和多媒体技术的不断发展和视频会议的广泛应用，目前发展出了多个麦克风组合的麦克风级联技术。现有的麦克风级联都是基于有线的，在级联过程中，将其中一个麦克风作为主设备与视频会议终端相连，将其他的麦克风作为子设备与主设备连接。这样，一旦主设备因传输故障或其他因素与视频会议终端断开连接，视频会议也就中断，用户需要再次使用网线将主设备与视频会议终端进行连接，从而影响视频会议中的用户体验。
发明内容
为了至少在一定程度上解决相关技术中的技术问题之一，本发明实施例提供一种自组网级联方法、音频采集设备、视频会议系统、计算机可读存储介质。
第一方面，本发明实施例提供一种自组网级联方法，应用于音频采集设备，所述方法包括：判断当前是否存在主设备；若判断出不存在主设备，则向同一组内的其他音频采集设备发送竞选广播信息；若在发送所述竞选广播信息之后的第一时长内未接收到同一组内的其他音频采集设备的竞选广播信息，则向同一组内的其他音频采集设备发送主设备广播信息。
第二方面，本发明实施例提供一种音频采集设备，包括：声音采集部、存储器和处理器，所述存储器上存储有计算机程序，当所述计算机程序被所述处理器执行时实现上述实 施例中的方法。
第三方面，本发明实施例提供一种视频会议系统，包括视频会议终端和上述实施例中的音频采集设备，所述音频采集设备用于与所述视频会议终端进行无线通信连接。
第四方面，本发明实施例提供一种计算机可读存储介质，其上存储有计算机程序，当所述计算机程序被执行时实现上述实施例中的方法。
附图是用来提供对本发明的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本发明，但并不构成对本发明的限制。在附图中：
图1为多个麦克风级联的示意图；
图2为本发明实施例提供的自组网级联方法的示意图；
图3为本发明实施例提供的另一种自组网级联方法的示意图；
图4为音频采集设备初次与视频会议终端进行配对绑定的示意图；
图5为本发明实施例中音频采集设备第N次与视频会议终端进行配对绑定的示意图；以及
图6为本发明实施例中音频采集设备在多个状态之间切换的示意图。
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本发明，并不用于限制本发明。
在目前的视频会议系统中，多个麦克风进行级联，具体地，选定其中一个麦克风作为主设备，其余麦克风作为子设备，并将主设备与视频会议终端相连，将子设备与主设备相连。如图1所示，麦克风MIC1为主设备，麦克风MIC2和MIC3为子设备，麦克风MIC2和MIC3将采集到的音频发送至麦克风MIC1，麦克风MIC1将自身采集到的音频以及接收到的子设备采集的音频进行处理后，发送至视频会议终端。
在现有的视频会议系统中，麦克风级联都是基于有线的方式进行级联，例如，使用数据线或者网线将多个麦克风连接。而当主设备因传输故障或其他因素与视频会议终端断开连接时，视频会议过程也就中断，此时，用户需要再次将主设备与视频会议终端进行连接，从而影响视频会议中的用户体验。
作为本发明的第一方面，提供一种自组网级联方法，该方法应用于音频采集设备，该音频采集设备可以为麦克风，具体可以为数字麦克风。图2为本发明实施例提供的自组网级联方法的示意图，如图2所示，自组网级联方法包括：
S11、本音频采集设备判断当前是否存在主设备，若判断出不存在主设备，则进行步 骤S12：本音频采集设备向同一组内的其他音频采集设备发送竞选广播信息，即，本音频采集设备进入竞选状态。
若本音频采集设备发送竞选广播信息之后，在第一时长内未接收到其他音频采集设备的竞选广播信息，则表明同一组内没有其他音频采集设备参加竞选，此时，进行步骤S13：本音频采集设备向同一组内的其他音频采集设备发送主设备广播信息，即，本音频采集设备作为主设备，从而接收各个子设备的音频数据，且主设备将自身采集的数据和子设备采集的音频数据进行处理后，发送至视频会议终端。
其中，在视频会议系统中，视频会议终端可以与多个音频采集设备进行配对绑定，同一个视频会议终端以及该视频会议终端所绑定的音频采集设备成为一个组(Group)。主设备广播信息为主设备所发出的信息，该信息用于指示主设备存在于网络中，即，若某一音频采集设备接收到主设备广播信息，则可以确定当前网络中存在主设备。本发明实施例中的主设备和子设备均是音频采集设备(即，麦克风)，主设备作为语音处理中心，将主设备采集的音频数据以及接收到的各子设备采集的音频数据进行处理后发送至视频会议终端。主设备可以周期性地发出主设备广播信息。需要说明的是，本发明实施例中，主设备广播信息和竞选广播信息都是以无线的方式进行广播发送的。
应当理解的是，在本发明实施例中，本音频采集设备为自组网级联方法的执行主体，同一组内的其他音频采集设备是指，同一组内除了本音频采集设备之外的其他音频采集设备。主设备为处于第一特定状态下的音频采集设备，音频采集设备处于第一特定状态下时，将自身采集到的音频以及接收到的子设备采集的音频进行处理后，发送至视频会议终端。子设备为处于第二特定状态下的音频采集设备，音频采集设备处于第二特定状态下，将采集到的音频发送给主设备。其中，对于任意一个音频采集设备而言，该音频采集设备有可能成为主设备，也有可能成为子设备。
在现有的级联方式中，用户选定一个音频采集设备作为主设备，并利用数据线或网线将主设备与视频会议终端进行有线连接，利用数据线或网线将其他音频采集设备与主设备连接。完成连接之后，主设备也就固定。一旦主设备因传输故障或其他因素与视频会议终端断开连接，视频会议过程也就中断，需要用户再次将主设备与视频会议终端进行连接。
而在本发明实施例中，若当前不存在主设备，则本音频采集设备可以向同一组内的其他音频采集设备发送竞选广播信息，从而进入竞选状态。若进入竞选状态之后，在第一时长内没有其他音频采集设备进行竞选，则本音频采集设备自动成为主设备。因此，在视频会议系统中，一旦主设备发生故障，则对于其他的任意一个音频采集设备而言，该音频采集设备就会检测出当前不存在主设备，从而进入竞选状态，进而在没有其他音频采集设备 进行竞选时自动成为主设备，这样可以防止视频会议发生长时间中断，且无需用户来手动连接音频采集设备与视频会议终端，从而提高了用户体验。
图3为本发明实施例提供的另一种自组网级联方法的示意图，如图3所示，该自组网级联方法包括：
步骤S20、本音频采集设备判断当前是否存在主设备，若本音频采集设备判断出存在主设备，则进行以下步骤S21。若本音频采集设备判断出不存在主设备，则进行以下步骤S22。
其中，步骤S20包括：本音频采集设备判断第三时长内是否接收到主设备广播信息，若本音频采集设备在第三时长内接收到主设备广播信息，则确定存在主设备；若本音频采集设备在第三时长内未接收到主设备广播信息，则确定不存在主设备。
其中，第三时长可以为主设备广播周期的两倍。例如，第三时长为2秒。
步骤S21、本音频采集设备自动作为子设备，从而将采集的音频数据发送至主设备。
步骤S22、本音频采集设备向同一组内的其他音频采集设备广播竞选消息，即，本音频采集设备进入竞选状态。
在步骤S22之后，若本音频采集设备在第一时长内未接收到其他音频采集设备的竞选广播信息，则进行以下步骤S23a。
步骤S23a、本音频采集设备成为主设备，并发送主设备广播信息，从而使得其他音频采集设备确定目前已存在主设备。另外，本音频采集设备还可以将其设备号和状态信息发送至视频会议终端，以使视频会议终端获得当前的主设备的信息。
在步骤S22之后，若本音频采集设备在第一时长内接收到主设备广播信息，则进行以下步骤S24a。其中，第一时长可以根据实际需要进行设置，当第一时长的取值过大时，则会导致整个级联过程进行得较慢，当第一时长的取值过小时，则有可能出现本音频采集设备一直接收不到主设备广播信息的情况，而导致级联过程出现错误。在本发明实施例中，第一时长可以为800毫秒。
步骤S24a、本音频采集设备成为子设备。
在步骤S22之后，若本音频采集设备在第二时长内接收到同一组内其他音频采集设备的竞选广播信息，则进行以下步骤S25a。
步骤S25a、本音频采集设备根据预设规则判断是否参加竞选，若确定参加竞选，则返回步骤S22；若放弃竞选，则进行以下步骤S25b。其中，根据预设规则判断是否参加竞选的判断结果具有一定的随机性。
步骤S25b、本音频采集设备进入弃选状态，在弃选状态下，若第二时长内收到其他音 频采集设备的竞选广播信息或主设备广播信息，则本音频采集设备成为子设备；若在第二时长内未收到竞选广播信息或主设备信息，则返回步骤S25a。即，本音频采集设备确定放弃竞选后，还有多个其他的音频采集设备仍处在竞选状态，则本音频采集设备作为子音频采集设备；或者，同一组内只有两个音频采集设备，若本音频采集设备放弃竞选，则其余一个音频采集设备自主成为主设备，从而使得本音频采集设备收到主设备广播信息，此时，本音频采集设备自主成为子设备。
其中，第二时长可以根据实际需要进行设置，当第二时长的取值过大时，则会导致整个级联过程进行得较慢，当第二时长的取值过小时，则有可能出现本音频采集设备一直接收不到竞选广播信息或主设备广播信息的情况，导致级联过程出现错误。在本发明实施例中，第二时长可以为800毫秒。预设规则包括：利用预设算法对随机种子进行运算，以得到第一运算结果或第二运算结果。其中，第一运算结果指示参加竞选，第二运算结果指示放弃竞选。例如，利用预设算法对随机种子进行运算，得到0或1的结果，当结果为0时，表示放弃竞选；当结果为1时，表示参加竞选。在一实施例中，可以将系统时间作为随机种子，当系统时间不同时，运算结果也不同，音频采集设备参加竞选的概率为0.5。
在实际的实现过程中，音频采集设备可以发送以下三种信令：DMCI_DMIC_MAIN_BROADCAST信令、DMIC_DMIC_ELECTION信令、DMIC_DMIC_ASK_MAIN。其中，DMCI_DMIC_MAIN_BROADCAST信令作为上述主设备广播信息，发送该信令的音频采集设备为主设备或者可能是主设备，并周期广播通知所有音频采集设备。DMIC_DMIC_ELECTION信令作为竞选信息，发送本信令的音频采集设备处于竞选状态。若音频采集设备刚与视频会议终端配对绑定，或长时间未接收到主设备信息，则可以发送DMIC_DMIC_ASK_MAIN信令。
各个音频采集设备上电时，处于独立工作的状态，若断开网络后重新连上，也处于此状态，之后各音频采集设备根据自身的当前状态和接收到的主设备广播信息或竞选广播信息，自动成为主设备或子设备，实现同一组内只有一个音频采集设备为主设备，而其他音频采集设备均成为子设备。主设备周期性广播，以维护子设备间的拓扑结构。
在本发明实施例中，若音频采集设备在第三时长内未接收到主设备信息，则进入竞选状态。若进入竞选状态之后，在第一时长内没有其他音频采集设备进行竞选，则本音频采集设备自动成为主设备；若进入竞选状态之后，在第一时长存在其他音频采集设备进行竞选，则本音频采集设备根据预设规则来计算是否参加竞选，若本音频采集设备确定放弃竞选、而其他音频采集设备参加竞选，则本音频采集设备自动作为子音频设备；否则，本音频采集设备再次进入竞选状态，进而再次计算是否参加竞选，直到确定出本音频采集设备 为主设备还是子设备。通过这种方式，多个音频采集设备与视频会议终端无线连接后，多个音频采集设备可以自动竞选出主设备，从而建立级联关系，因此，在视频会议系统中，无需用户使用网线将多个音频采集设备进行级联，提高了用户体验。
在一种实施例中，自组网级联方法还包括：在步骤S20之前进行的以下步骤：音频采集设备与视频会议终端进行配对绑定。其中，视频会议终端能够与多个音频采集设备配对绑定，与同一个视频会议终端配对绑定的多个音频采集设备属于同一组。
图4为音频采集设备初次与视频会议终端进行配对绑定的示意图。如图4所示，音频采集设备初次与视频会议终端进行配对绑定的步骤包括：
音频采集设备向视频会议终端发送发现DHCPDISCOVER报文。视频会议终端在收到DHCPDISCOVER报文后，判断当前已绑定的音频采集设备的数量，若当前已绑定的音频采集设备的数量达到预设数量(例如，三个)，则设置一个超时时间放入否认DHCPNACK报文中进行发送；若当前绑定的音频采集设备的数量小于预设数量，则视频会议终端选择合适的设备号DepID放入分配DHCPOFFER报文中，进行发送。另外，视频会议终端还可以使用外网口MAC地址生成组号GroupID，并将GroupID加入DHCPOFFER报文中，同一组中的音频采集设备可以通过GroupID互发信息。
若音频采集设备接收到DHCPOFFER报文，则音频采集设备向视频会议终端发送第一请求DHCPREQUEST报文，第一DHCPREQUEST报文中包括音频采集设备所选择的DepID，第一DHCPREQUEST报文至少用于请求使用DepID。若由于某种原因，音频采集设备可能会收到多个DHCPOFFER报文，这种情况下，音频采集设备可以在接收到第一个DHCPOFFER报文时，发送第一DHCPREQUEST报文。视频会议终端接收到第一DHCPREQUEST报文之后，判断音频采集设备是否选择了视频会议终端提供的DepID，如果是，则视频会议终端发送第一确认DHCPACK报文。
若音频采集设备接收到第一DHCPACK报文，则音频采集设备切换至配对绑定Bound状态，即，将本音频采集设备与视频会议终端绑定。在Bound状态，音频采集设备可以使用DepID发送音频数据。
图5为本发明实施例中音频采集设备第N次与视频会议终端进行配对绑定的示意图，如图5所示，音频采集设备第N次与所述视频会议终端进行配对绑定的步骤包括：
音频采集设备向视频会议终端发送第二DHCPREQUEST报文，第二DHCPREQUEST报文至少用于请求再次使用第N-1次配对绑定时所使用的DepID，其中，N为大于1的整数。视频会议终端收到第二DHCPREQUEST报文后，发送第二DHCPACK报文或第二DHCPNACK报文。
若音频采集设备接收到第二DHCPACK报文，则将本音频采集设备再次与视频会议终端 配对绑定。
图6本发明实施例中音频采集设备在多个状态之间切换的示意图，如图6所示，在初始Init状态，音频采集设备发送DHCPDISCOVER报文，从而进入选择Selecting状态。其中，Init状态为音频采集设备首次与视频会议终端进行配对绑定时的初始状态。在Selecting状态，当音频采集设备接收到DHCPOFFER报文时，发送第一DHCPREQUEST报文，从而进入请求Requesting状态。在Requesting状态，若音频采集设备接收到第一DHCPACK报文，则切换至Bound状态；若音频采集设备接收到第一DHCPNACK报文，则切换至Init状态。
其中，第一DHCPNACK报文中包括：允许音频采集设备使用设备号的租约时间。与视频会议终端配对绑定的步骤还包括：音频采集设备根据第一DHCPNACK报文中的租约时间，确定第一时间和第二时间。若音频采集设备使用DepID的时间达到第一时间，则进入更新Renewing状态，此时，音频采集设备请求再次与视频会议终端进行绑定，从而向视频会议终端发送第二DHCPREQUEST报文，该第二DHCPREQUEST报文中包括前一次配对绑定时所使用的DepID，即，当前正在使用的DepID。视频会议终端收到第二DHCPREQUEST报文后，发送第二DHCPACK报文或第二DHCPNACK报文。若在设备号的使用时间达到第二时间之前，音频采集设备接收到第二DHCPACK报文，则音频采集设备再次进入Bound状态，并对DepID的使用时间重新计时。若音频采集设备接收到第二DHCPNACK报文，则切换至Init状态。若音频采集设备没有接收到视频会议终端的任何回复，则在DepID的使用时间达到第二时间时，再次发送第二DHCPREQUEST报文，同样的，若音频采集设备接收到第二DHCPACK报文，则进入Bound状态；若音频采集设备接收到第二DHCPNACK报文，则切换至Init状态。
在一实施例中，第一时间可以为租约时间的一半，第二时间可以为租约时间的0.75倍～0.9倍。
在Bound状态下，若音频采集设备接收到关机指令或休眠指令，则向视频会议终端发送解除Release报文，进入Init状态。
在重启初始InitReboot状态，音频采集设备向视频会议终端发送第二DHCPREQUEST报文，从而进入重启中Rebooting状态。视频会议终端接收到第二DHCPREQUEST报文后，发出第二DHCPACK报文或第二DHCPNACK报文。若音频采集设备接收到第二DHCPACK报文，则进入Bound状态；若音频采集设备接收到第二DHCPNACK报文，则进入Init状态。
与同一个视频会议终端配对绑定的所有音频采集设备成为一组，同一组中的音频采集设备自动组织并选举出一个主设备。其中，在自动组织选举主设备的过程中，每个音频采集设备均通过图2的过程自动成为主设备或子设备。之后，子设备将采集到的音频数据发 送至主设备，主设备将自身采集到的音频数据和子设备发送的音频数据进行处理，发送至视频会议终端。
作为本发明的第二方面，还提供一种音频采集设备，其包括：声音采集部、存储器和处理器，存储器上存储有计算机程序，当所述计算机程序被所述处理器执行时实现根据上述实施例中的自组网级联方法。
作为本发明的第三方面，还提供一种视频会议系统，其包括视频会议终端和音频采集设备，音频采集设备用于与视频会议终端进行无线通信连接。其中，音频采集设备为麦克风，具体可以为数字麦克风。
作为本发明的第四方面，还提供一种计算机可读存储介质，其上存储有计算机程序，当所述计算机程序被执行时实现上述实施例中的自组网级联方法。
在本发明实施例中，若当前不存在主设备，则本音频采集设备可以向同一组内的其他音频采集设备发送竞选广播信息，从而进入竞选状态。若进入竞选状态之后，在第一时长内没有其他音频采集设备进行竞选，则本音频采集设备自动成为主设备。因此，一旦主设备发生故障，则对于其他的任意一个音频采集设备而言，该音频采集设备就会检测出当前不存在主设备，从而进入竞选状态，进而在没有其他音频采集设备进行竞选时自动成为主设备，这样可以防止视频会议发生长时间中断，且无需用户来手动连接音频采集设备与视频会议终端，从而提高了用户体验。
本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件、固件、硬件及其适当的组合。在硬件实施方式中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由若干物理组件合作执行。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其它数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其它存储器技术、CD-ROM、数字多功能盘(DVD)或其它光盘存储、磁盒、磁带、磁盘存储或其它磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其它的介质。此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其它传输机制之类的调 制数据信号中的其它数据，并且可包括任何信息递送介质。
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。
Claims (12)
- 一种自组网级联方法，应用于音频采集设备，所述方法包括：判断当前是否存在主设备；若判断出不存在主设备，则向同一组内的其他音频采集设备发送竞选广播信息；若在发送所述竞选广播信息之后的第一时长内未接收到同一组内的其他音频采集设备的竞选广播信息，则向同一组内的其他音频采集设备发送主设备广播信息。
- 根据权利要求1所述的方法，还包括：若在发送所述竞选广播信息之后的第一时长内接收到同一组内的其他音频采集设备的竞选广播信息，则根据预设规则判断是否参加竞选；其中，根据所述预设规则判断是否参加竞选的判断结果具有随机性；若确定参加竞选，则返回所述向同一组内的其他音频采集设备发送竞选广播信息的步骤；若确定放弃竞选、且接收到同一组内其他音频采集设备的竞选广播信息或主设备广播信息，则将本音频采集设备作为子设备。
- 根据权利要求2所述的方法，还包括：若确定放弃竞选、且在第二时长内未接收到同一组内其他音频采集设备的竞选广播信息，则返回所述根据预设规则判断是否参加竞选的步骤。
- 根据权利要求2所述的方法，其中，所述预设规则包括：利用预设算法对随机种子进行运算，以得到第一运算结果或第二运算结果；其中，所述第一运算结果指示参加竞选，所述第二运算结果指示放弃竞选。
- 根据权利要求1所述的方法，其中，判断当前是否存在主设备的步骤之后，还包括：若判断出存在主设备，则将本音频采集设备作为子设备。
- 根据权利要求1所述的方法，其中，判断当前是否存在主设备的步骤包括：判断在第三时长内是否接收到主设备广播信息，若在第三时长内接收到所述主设备广播信息，则确定存在所述主设备；若在第三时长内未接收到所述主设备广播信息，则确定不存在所述主设备。
- 根据权利要求1至6中任一项所述的方法，其中，判断当前是否存在主设备的步骤之前，还包括：与视频会议终端配对绑定，其中，所述视频会议终端能够与多个音频采集设备配对绑定，与同一个所述视频会议终端配对绑定的多个音频采集设备属于同一组。
- 根据权利要求7所述的方法，其中，初次与所述视频会议终端配对绑定的步骤包括：向所述视频会议终端发送发现报文；若接收到所述视频会议终端的分配报文，则向所述视频会议终端发送第一请求报文，其中，所述分配报文中包括由所述视频会议终端分配的设备号，所述第一请求报文至少用于请求使用所述设备号；若接收到所述视频会议终端基于所述第一请求报文所发送的第一确认报文，则将本音频采集设备与所述视频会议终端绑定。
- 根据权利要求8所述的方法，其中，第N次与所述视频会议终端进行配对绑定的步骤包括：向所述视频会议终端发送第二请求报文，所述第二请求报文至少用于请求再次使用第N-1次配对绑定时所使用的设备号，其中，N为大于1的整数；若接收到所述视频会议终端基于所述第二请求信号所发送的第二确认报文，则将本音频采集设备再次与所述视频会议终端配对绑定。
- 一种音频采集设备，包括：声音采集部、存储器和处理器，所述存储器上存储有计算机程序，当所述计算机程序被所述处理器执行时实现根据权利要求1-9任一所述的方法。
- 一种视频会议系统，包括视频会议终端和权利要求10所述的音频采集设备，所述音频采集设备用于与所述视频会议终端进行无线通信连接。
- 一种计算机可读存储介质，其上存储有计算机程序，当所述计算机程序被执行时实现根据权利要求1-9任一所述的方法。
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