CN114979972A - Audio broadcast source end device and audio sharing method - Google Patents
Audio broadcast source end device and audio sharing method Download PDFInfo
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- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H04B7/00—Radio transmission systems, i.e. using radiation field
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- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
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- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
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Abstract
The application relates to an audio broadcast source end device and an audio sharing method. The audio broadcast source device includes: at least two transmit antennas, the at least two transmit antennas being located at different positions or having different attitudes. Further comprising a broadcast enabled wireless communication module configured to: causing at least a portion of the at least two transmit antennas to cooperate to perform the set number of repeated transmissions of audio data such that the set number of repeated transmissions of the same audio data are performed by different transmit antennas in a time-shared manner. The high-quality music sharing function is realized, so that each destination device can better receive audio data from a source device.
Description
Technical Field
The present invention relates to a wireless audio broadcasting device, and more particularly, to an audio broadcasting source device and an audio sharing method.
Background
LE Audio enables a single Audio source device to broadcast one Audio stream to an unlimited number of bluetooth Audio receiving devices by broadcasting Audio. When the broadcast audio is turned on, audio receiving devices in any range can be added, and when the broadcast audio is turned off, only the audio receiving device which inputs the correct password is allowed to be added. Therefore, the broadcast audio realizes brand new Bluetooth use case-audio sharing.
Bluetooth audio sharing may be based on both person and location. With personal audio sharing, a user will be able to share his own bluetooth audio experience with people around, e.g., sharing music on a smartphone with family, friends. By means of the audio sharing based on the position, the Bluetooth audio can be shared in public places such as airports, bars, gymnasiums, movie theaters and conference centers, and therefore the use experience of visitors is improved.
Fig. 1 is a schematic diagram illustrating a conventional audio data transmission manner from a source device to a destination device. As shown in fig. 1, in this audio data transmission manner from a source device to a destination device, the source device 101 simultaneously transmits audio data to a plurality of destination devices, such as a first destination device 102a, a second destination device 102b, a jth destination device 102j, and an mth destination device 102 m. The positions of the multiple destination devices are different, for example, different gate-on ports in the same airport, because of different distances from the source devices, there may be a defect in the audio signal received by the destination device due to poor channel between one or more source devices and the destination device. Or, for the location-based audio sharing, the environment where multiple destination devices are located has large interference, such as public places like airports, bars, gymnasiums, movie theaters, conference centers, etc., because of the dense people stream, the interference of audio data transmission is large, and the places which require audio sharing coverage are large, the reception of audio data signals of some destination devices is affected, and the audio use experience of the destination devices is reduced.
To support Audio sharing, LE Audio introduced a Broadcast Isochronous Group (BIG) and a Broadcast Isochronous Stream (BIS). There are two types of such devices: a synchronous Broadcaster (Isochronous Broadcaster) and a synchronous receiver (synchronized receiver), also called source end device and destination end device.
A synchronized broadcast group is created by a source device, containing one or more synchronized broadcast streams. In order to conveniently enable the destination device to join the synchronized broadcast group, the source device sends synchronized broadcast group information (BIGInfo) by using a periodic advertisement event (periodic advertisement), and if the destination device cannot smoothly and correctly receive the complete BIGInfo due to environmental interference, distance, blockage and the like, the destination device cannot join the synchronized broadcast group, and subsequent audio data reception cannot be performed.
Disclosure of Invention
The present application is provided to solve the above-mentioned problems occurring in the prior art.
There is a need for an audio broadcast source device and an audio sharing method, which can overcome the problem of large interference in audio sharing, increase the coverage of audio sharing, improve the use experience of visitors, and make audio broadcast have better transmission performance. The problem that the channel is poor for a long time or is poor all the time can be solved, each destination device can better receive the audio data from the source device, and high-quality music sharing is achieved.
According to a first aspect of the present application, an audio broadcast source device is provided. The audio broadcast source end device comprises at least two transmitting antennas, and the at least two transmitting antennas are located at different positions or have different postures.
The audio broadcast source device further comprises a broadcast-capable wireless communication module configured to: causing at least a portion of the at least two transmit antennas to cooperate to perform the set number of repeated transmissions of audio data such that the set number of repeated transmissions of the same audio data are performed by different transmit antennas in a time-shared manner.
According to a second aspect of the present application, an audio sharing method is provided. The audio broadcast source terminal device comprises at least two transmitting antennas, wherein the at least two transmitting antennas are located at different positions or have different postures, and the audio sharing method comprises the following steps: the number of times of repeated transmission is set by the audio broadcast source terminal apparatus for different audio data, respectively.
The audio sharing method further includes performing, by the audio broadcast source device, the repeated transmission of the set number of times of the audio data using the at least two transmitting antennas in cooperation, so that the repeated transmission of the set number of times of the same audio data is performed by different transmitting antennas in a time-sharing manner.
By using the audio broadcast source end device and the audio sharing method according to the embodiments of the application, the problem of large interference in audio sharing can be solved, the coverage range of audio sharing is larger, the use experience of visitors is improved, and the audio broadcast has better transmission performance. The problem that the channel is poor for a long time or is poor all the time can be solved, each destination device can better receive the audio data from the source device, and high-quality music sharing is achieved.
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In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments generally by way of example and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.
Fig. 1 is a schematic diagram illustrating a conventional audio data transmission manner from a source device to a destination device;
fig. 2 shows an exemplary structure and operation principle diagram of an audio broadcast source device according to a first embodiment of the present application;
fig. 3 illustrates an exemplary diagram of a source device transmitting audio data to a plurality of destination devices according to an embodiment of the present application;
fig. 4 shows an exemplary structure and operation principle diagram of an audio broadcast source device according to a second embodiment of the present application;
fig. 5 shows an exemplary structure and operation principle diagram of an audio broadcast source device according to a third embodiment of the present application;
FIG. 6 shows an exemplary diagram of an LE audio synchronized broadcast group;
FIG. 7 illustrates an exemplary diagram of a first type of synchronized broadcast group according to an embodiment of the present application;
FIG. 8 illustrates an exemplary diagram of a second type of synchronized broadcast group according to an embodiment of the present application;
FIG. 9 illustrates an exemplary diagram of a third synchronized broadcast group according to an embodiment of the present application;
fig. 10 shows a flow chart of an audio sharing method according to an embodiment of the application; and
fig. 11 shows a flowchart of an audio sharing method under different numbers of transmitting antennas according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the present application is described in detail below with reference to the accompanying drawings and the detailed description. The embodiments of the present application will be described in further detail below with reference to the drawings and specific embodiments, but the present application is not limited thereto. The terms "first," "second," and "third" as used in this application are intended only to distinguish between corresponding features, and do not denote a need for such ordering, nor do they necessarily denote the singular.
Fig. 2 shows an exemplary structure and operation principle diagram of an audio broadcast source device according to the first embodiment of the present application. As shown in fig. 2, the audio broadcast source terminal apparatus includes at least two transmitting antennas, for example, a first transmitting antenna 203a, a second transmitting antenna 203b, a third transmitting antenna 203c, and the like. When the individual transmit antennas are not distinguished, they are collectively identified as 203 below. The number of the transmitting antennas 203 is 2 or more than 2, and may be 5, 10, or the like, and may be set according to the situation of the place of the audio broadcasting, the situation of the number of times of repeated transmission of the audio data, or the like.
By providing at least two transmitting antennas 203 located at different positions or having different attitudes for transmitting audio data, the capability of the destination device to receive audio data can be improved. The at least two transmitting antennas 203 can be located at different positions, so that the relative positions of the at least two transmitting antennas 203 and each destination device are different, whether each destination device has shielding conditions is different, the multipath reflections when each destination device receives the audio data sent by the at least two transmitting antennas are different, and the signal attenuation (fading) and the strength of the radio frequency signal when each destination device receives the audio data sent by each antenna are different.
If the transmitting antenna 203 has different postures, the attenuation of the signal when transmitting audio data to the destination device and the strength of the radio frequency signal received by the destination device may also be different, and the reflection condition and the shielding condition of the destination device may also be different. For a certain destination device, at least two transmitting antennas 203 located at different positions or having different postures transmit signals, even if the transmitting condition (including the shielding condition, the reflection condition, the attenuation condition, and the like) of one transmitting antenna 203a is poor, the other transmitting antennas 203b and 203c can still maintain good transmitting conditions, so that the capability of the destination device for receiving audio data can be improved.
In some embodiments, the position and/or attitude of each transmit antenna 203 may be complementarily configured. For example, the transmission directions of the transmission antenna 203a, the transmission antenna 203b, and the transmission antenna 203c may be made orthogonal to each other. For example, the transmitting antenna 203a, the transmitting antenna 203b, and the transmitting antenna 203c may be caused to be provided on different sides in the circumferential direction of the audio broadcast source terminal device. In this way, the respective transmitting antennas 203 can be complementarily assisted under variable transmitting conditions, so as to improve and ensure the capability of the destination device to receive audio data under various transmitting conditions.
The audio broadcast source device further includes a broadcast-supporting wireless communication module 202, and the wireless communication module 202 performs repeated transmission of audio data using at least two transmission antennas 203. The audio data may be the first audio data 201a or the second audio data 201b, etc. The same audio data refers to audio data with the same content, and may be, for example, the first audio data 201a or the second audio data 201 b. The wireless communication module 202 causes the at least two transmission antennas 203 to cooperatively perform the set number of repeated transmission of audio data such that the allocation of the set number of repeated transmission of the same audio data is performed by time-divisionally different transmission antennas 203. The same audio data is repeatedly transmitted n times, and the number of the transmitting antennas is m, then the first transmitting antenna 203a performs the first repeated transmission 204a, the second transmitting antenna 203b performs the second repeated transmission 204b, and the third transmitting antenna 203c performs the third repeated transmission 204c, which are sequentially performed in a time-sharing manner. The first transmitting antenna 203a, the second transmitting antenna 203b, and the third transmitting antenna 203c may be randomly selected from at least two transmitting antennas 203 or may be sequentially set, different transmitting antennas 203 spaced at a certain distance may be selected to transmit, and the problem of being far from a source end device or having large interference may be better overcome.
The wireless communication module 202 time-divisionally performs the repeated transmission allocation of the same audio data by the set number of times by the different transmission antennas 203. It is understood herein that the repeated transmission of the same audio data is time-shared by different transmit antennas to complete all the repeated transmissions. For example, the wireless communication module 202 controls the time-sharing processing procedure of different transmitting antennas through a switch, specifically, a first time is transmitted by one transmitting antenna, a second time is transmitted by the next transmitting antenna, and meanwhile, the last transmitting antenna is turned off to suspend transmission.
In some embodiments, the wireless communication module 202 may be implemented by an SOC (system on chip), for example, various RISC (reduced instruction set computer) processors IP purchased from ARM corporation and the like may be utilized as processors of the SOC to perform corresponding functions. The antenna may be externally attached to the chip.
The audio data described herein includes data for recording audio content, and the audio data may be carried in data blocks for transmission. It will be appreciated that the data blocks are transport data units, which may be of different data block types, such as Payload Data Units (PDUs) in bluetooth data transmission, etc.
Fig. 3 shows an exemplary diagram of a source device transmitting audio data to a plurality of destination devices according to an embodiment of the application. As shown in fig. 3, there are k (k > ═ 1) destination devices, and the k destination devices receive the same audio data transmitted by m (m > ═ 2) transmission antennas (i.e., the first transmission antenna 301a, the second transmission antenna 301b, and the m-th transmission antenna 301m of … …), respectively. Specifically, the first transmitting antenna 301a transmits the same audio data to the first destination device 302a, the second destination device 302b, and … …, respectively, and the kth destination device 302 k. The second transmitting antenna 301b transmits the same audio data to the first destination device 302a, the second destination device 302b, and the kth destination device 302k, respectively. The mth transmitting antenna 301m transmits the same audio data to the first destination device 302a, the second destination device 302b, and the kth destination device 302k, respectively. Thus, each destination device can receive the same audio data transmitted from different antennas. If an audio broadcast is transmitted by a certain transmitting antenna, the channel condition between the source device and a certain destination device may be poor in a period of time (e.g., 1ms or several ms or tens of ms, several tens of ms), and at this time, the destination device may not correctly receive any one of n (n > -2) retransmitted audio data from the source device, which may cause the audio playback to be jammed, or the audio playback to be noisy. However, when m transmitting antennas transmit the same PDU repeatedly in a time-sharing manner, as long as the channel condition between any transmitting antenna and the destination device is good, the destination device can more easily and correctly receive at least one piece of audio data, so that the capability of the destination device for receiving audio data is greatly improved, and the capability of the source device for sharing music to each destination device is improved.
Fig. 4 shows an exemplary structure and operation principle diagram of an audio broadcast source device according to a second embodiment of the present application. The set number of times of the repeated transmission of the audio data is smaller than the number of the at least two transmitting antennas, and each repeated transmission of the audio data is performed by a different transmitting antenna. As shown in fig. 4, the number of repeated transmission times n of the same audio data is smaller than the number m of transmission antennas. Audio data including the first audio data 401a and the second audio data 401b, etc. containing the same audio data content is input to the wireless communication module 402. The wireless communication module 402 time-divisionally performs the repeated transmission allocation of the same audio data for the set number of times by different transmission antennas. The same audio data represents a single one of the first audio data 401a, the second audio data 401b, and the like. Specifically, the first repetitive transmission 404a is performed by the first transmitting antenna 403a, the second repetitive transmission 404b is performed by the second transmitting antenna 403b, the third repetitive transmission 404c is performed by the third transmitting antenna 403c, and the nth repetitive transmission 404n is performed by the nth transmitting antenna 403n, thereby completing the n repetitive transmissions of the same audio data. Since the number of repeated transmission times n of the same audio data is smaller than the number m of the transmitting antennas, the wireless communication module 402 selects any n of the m transmitting antennas to perform transmission of the same audio data, or performs repeated transmission of the same audio data according to the n transmitting antennas that have been marked. Therefore, the n transmitting antennas respectively execute one-time repeated transmission of the same audio data, the n transmitting antennas are respectively positioned at different positions or have different directions or have different polarities, the destination equipment only needs to correctly receive a certain repeated transmission of the same audio data, and the reliability of audio broadcast transmission is improved.
Fig. 5 shows an exemplary structure and operation principle diagram of an audio broadcast source device according to a third embodiment of the present application. The set number of times of the repeated transmission of the audio data is greater than the number of the at least two transmission antennas so that each transmission antenna is assigned to at least one repeated transmission of the audio data. As shown in fig. 5, the number of times n that the same audio data is repeatedly transmitted is greater than the number m of transmitting antennas. Audio data including the first audio data 501a and the second audio data 501b, etc. is input to the wireless communication module 502. The wireless communication module 502 time-divisionally performs the repeated transmission allocation of the same audio data for the set number of times by different transmission antennas. The same audio data indicates the content including the same audio data in the first audio data 501a, the second audio data 501b, and the like.
The following description will exemplify the allocation manner, but it should be understood that the allocation manner is not limited thereto, as long as the group of transmitting antennas, i.e., the first transmitting antennas 503a, … … and the mth transmitting antenna 503m, are responsible for the corresponding part in the set retransmission times of the same audio data. When the individual transmit antennas are not distinguished, they are collectively identified as 503. As illustrated in the case of 2m > n > m, the first m times of the repeated transmission of the same audio data are performed one-to-one by m transmission antennas, where the first repeated transmission 504a is performed by the first transmission antenna 503a and the m-th repeated transmission 504m is performed by the m-th transmission antenna 503 m. The m +1 th retransmission 504m +1 and the n-m th retransmission 504n are performed by the first transmitting antenna 503a and the n-m th transmitting antenna 503n-m, respectively, after the same audio data is retransmitted n-m times. This completes n times of repeated transmission of the same audio data, and in this example, the n times of retransmission are performed via the m transmission antennas 503 in a sequential and alternate manner, but the present application is not limited thereto. In practice, the last n-m repeated transmissions may be performed by an optional n-m of the m transmit antennas.
If n-m is still larger than m, the time-sharing transmission is continued by using different m transmitting antennas until all the repeated transmission times are finished finally. Each of the transmitting antennas 503 is assigned to at least one repetitive transmission of the same audio data, that is, one or more repetitive transmissions of the same audio data are performed. The destination terminal equipment only needs to correctly receive a certain repeated transmission of the same audio data, and the reliability of audio broadcast transmission is improved.
In some embodiments of the present application, the wireless communication module comprises an LE audio module, and the audio data comprises audio data transmitted by an LE audio broadcast. LE audio supports audio sharing, which may be both personal and location based. The audio data of LE audio in audio sharing may be repeatedly transmitted n times. For the audio data of LE audio, the receiver does not feed back whether the audio data is correctly received, and the sender does not know whether the receiver correctly receives. The audio broadcast source end device can improve the reliability of LE audio broadcast transmission. The receiving party only needs to correctly receive the LE audio data at a certain time.
Fig. 6 shows an exemplary schematic diagram of an LE audio synchronized broadcast group. As shown in fig. 6, LE Audio introduces a Broadcast Isochronous Group (BIG) and a Broadcast Isochronous Stream (BIS). A BIG Event 601 includes a BIS Event 602 and a control sub-Event 602 b. Each BIS event 602 includes a plurality of bissubavents 602 a. The source end device of the LE Audio sends Audio data to a plurality of destination end devices through the BIG and the BIS, and Audio sharing is achieved. The BIS carries a Payload Data Unit (PDU) provided for broadcasting. The LE audio module is configured to enable the at least two transmitting antennas to cooperatively execute the retransmission timing of the PDU, and the receiving side can complete the broadcasting process of the audio as long as any retransmission of the PDU is correctly received. The following three embodiments respectively show different examples with retransmission PDUs.
Fig. 7 illustrates an exemplary diagram of a first type of synchronized broadcast group according to an embodiment of the present application. As shown in fig. 7, the BIS event 701 includes Payload Data Units (PDUs) P0, P1, P0, P1. The BIS event 702 includes Payload Data Units (PDUs) P2, P3, P2, P3. It can be seen that the PDU is repeatedly transmitted 2 times in fig. 7. In fig. 7, a BIG event includes a BIG event, and BIG event intervals are between adjacent BIG events. The audio data sent by the LE audio broadcast is carried in a Payload Data Unit (PDU). The LE audio module is configured such that at least portions of the at least two transmit antennas cooperate to perform retransmission timing of the PDU such that multiple retransmissions of the same PDU (e.g., P0) are performed in a time-shared manner by different transmit antennas.
Fig. 8 illustrates an exemplary diagram of a second type of synchronized broadcast group according to an embodiment of the present application. As shown in fig. 8, one BIG of LE Audio includes one BIS, and the leftmost BIS data PDU includes P0, P0, P0, P2, and P4. It can be seen that the PDU is repeatedly transmitted 5 times in fig. 8. Between adjacent BIG events in fig. 8 is a BIG event interval. The audio data sent by the LE audio broadcast is carried in a Payload Data Unit (PDU). The LE audio module is configured such that at least portions of the at least two transmit antennas cooperate to perform retransmission timing of the PDU such that multiple retransmissions of the same PDU (e.g., P0) are performed in a time-shared manner by different transmit antennas.
Fig. 9 illustrates an exemplary diagram of a third synchronized broadcast group according to an embodiment of the present application. As shown in fig. 9, one BIG of the LE Audio includes one BIS, and the leftmost BIS data PDU includes P0, P1, P0, P1, P8, and P9. It can be seen that the PDU is repeatedly transmitted 3 times in fig. 9. Between adjacent BIG events in fig. 9 is a BIG event interval. The audio data sent by the LE audio broadcast is carried in a Payload Data Unit (PDU). The LE audio module is configured to cause at least portions of the at least two transmit antennas to cooperatively perform retransmission timing of the PDU such that multiple retransmissions of the same PDU (e.g., P0) are performed time-divisionally by different transmit antennas.
The at least two transmit antennas follow the same retransmission timing or complementary retransmission timing of the PDU, wherein the same repetition timing refers to: the sending time sequences of different sending antennas are the same, and in the specific execution process, different sending antennas can be set to execute different retransmission times, for example, the first repeated sending is completed by a first sending antenna, the second repeated sending is completed by a second sending antenna, and meanwhile, when the second repeated sending is performed, the sending power of the first sending antenna is set to be lower than the threshold value, which means that the first sending antenna does not have the second repeated sending or the sending destination end does not receive the sending. Wherein the complementary retransmission timing is: the retransmission timings of different transmitting antennas are complementary, for example, the first transmitting antenna performs a first repeated transmission and a third repeated transmission, the second transmitting antenna performs a second repeated transmission, each repeated transmission is performed by one of the at least two transmitting antennas, and finally, multiple retransmissions of the PDU can be performed.
In fig. 7, 8, and 9, different transmitting antennas are respectively used to transmit different repeat PDUs in a time-sharing manner, and as long as the channel condition between any one transmitting antenna and the destination device is good, the destination device can more easily and correctly receive at least one LE audio data, so that the capability of the destination device to receive audio data is greatly improved, and the capability of a source device to share music with each destination device is improved.
As can be seen from fig. 7, 8 and 9, the number of PDU retransmissions of LE audio is different in different sync broadcast groups, e.g., as shown in fig. 8 according to P0, P0, P0, P2, P4; p1, P1, P1, P3, P5; p2, P2, P2, P4, P6; p3, P3, P3, P5, P7; p4, P4, P4, P6, P8 for transmitting the PDUs of BIS. Meanwhile, the PDUs that can be obtained for BIS are not transmitted in full order. When multiple retransmissions of a PDU are performed by the same transmitting antenna, such a case of incomplete sequential transmission may cause the destination device to correctly receive one of the duplicate PDUs (e.g., P4) even when the channels between the source device and the destination device are short and bad (e.g., the time channels of 15 consecutive BIS are bad, and the destination device cannot correctly receive the audio broadcast frame), and thus may not cause the loss of the audio signal received by the destination device, and may not cause the pause or noise when the destination device plays audio.
In case the duplicate PDUs are sent in sequence, such as for the case of 5 repetitions, such as according to P0, P0, P0, P0, P0; p1, P1, P1, P1, P1; p2, P2, P2, P2, P2; … to transmit the PDUs of the BIS. In the synchronized broadcast group of LE audio, BIS parameters are configured such that PTO is 0, and PDUs are transmitted in order. When the channel between the source device and the destination device is poor for a short time, it may cause the destination device to fail to correctly receive any of the multiple retransmit PDUs, thereby causing a loss of audio signal. At least two transmitting antennas of the audio broadcast source end device of the present application are located at different positions or different orientations, so that at least two transmitting antennas have channels with correlation lower than a predetermined condition (the channels from the transmitting antennas to the destination device are independent or weak in correlation with each other), repeat PDUs are sent in sequence, and for the same PDU, the audio broadcast source end device of the present application performs time sharing by using at least two transmitting antennas. This can overcome the situation that the channel between a source device and a destination device is relatively short, and even the channel between a transmitting antenna and the destination device is relatively short or poor all the time, because the channel between other transmitting antennas and the destination device may be relatively good. And for repeated PDU to be sent in sequence, the broadcast time delay can be reduced, and the size of the broadcast sending buffer can be reduced.
In some embodiments of the present application, the audio broadcast source device further comprises an audio broadcast image source device. The audio broadcast source end device can be one or more sound boxes, and also can be an earphone to the ear, and the like. In addition to being used for the transmission of audio data, it may also be used for playing audio.
In some embodiments of the present application, the audio data comprises audio data processed in an LC3/LC3+ encoding manner. The source device compresses audio data in an LC3/LC3+ encoding mode (Encode), and then as a broadcast source, transmits broadcast information in a BIS mode to a destination device (e.g., wireless headset, wireless sound box), and the destination device can receive the broadcast audio BIS, then decode and play the audio. The LC3/LC3+ coding mode can provide higher sound quality under the condition of the same bit rate. In addition, the audio broadcast source device may also support other encoding methods, such as an SBC encoding method, an AAC encoding method, and the like.
The following describes an audio sharing method of an audio broadcast source device according to an embodiment of the present application.
Fig. 10 shows a flowchart of an audio sharing method according to an embodiment of the present application. As shown in fig. 10, the audio sharing method is suitable for an audio broadcast source device, where the audio broadcast source device includes at least two transmitting antennas, and the at least two transmitting antennas are located at different positions or have different postures. The audio sharing method starts in step S1001, where the audio broadcast source device sets the number of times of repeated transmission for different audio data. For example, it is set by the audio broadcast source device that audio data is repeatedly transmitted 4 times, 6 times, and the like. The number of times the audio data is repeatedly transmitted may be the same or different in different cases in different broadcasts.
In step S1002, the audio broadcast source device performs the repeated transmission of the set number of times of audio data using the at least two transmitting antennas in cooperation, so that the repeated transmission of the set number of times of the same audio data is performed by different transmitting antennas in a time-sharing manner. The at least two transmitting antennas are respectively arranged at different positions, so that the relative positions of the at least two transmitting antennas and each destination terminal device are different, whether each destination terminal device has shielding conditions is different, the multipath reflection when each destination terminal device receives the audio data sent by the at least two transmitting antennas is also different, and the signal attenuation (fading) and the strength of the radio frequency signal when each destination terminal device receives the audio data sent by each antenna are also different.
If the transmitting antenna has different attitudes, the signal attenuation and the strength of the radio frequency signal when transmitting audio data to and from the destination device may also be different. For a certain destination device, at least two transmitting antennas located at different positions or having different postures transmit signals, even if the transmitting condition (including the shielding condition, the reflection condition and the attenuation condition) of one transmitting antenna is poor, other transmitting antennas can still maintain good transmitting conditions, and therefore the capability of the destination device for receiving audio data can be improved.
In some embodiments, the position and/or attitude of the various transmit antennas may be complementarily configured. For example, the transmission directions of the different transmission antennas may be made orthogonal to each other. For example, different transmitting antennas may be arranged on different sides in the circumferential direction of the audio broadcast source device. Therefore, the transmitting antennas can be complementary under variable transmitting conditions, so that the capability of the destination equipment for receiving audio data under various transmitting conditions is improved and ensured.
The audio broadcast source end device performs the repeated transmission of the set number of times of audio data using the at least two transmitting antennas in cooperation, so that the repeated transmission of the set number of times of the same audio data is performed by different transmitting antennas at different times. Different transmitting antennas transmit the same audio data in a time-sharing manner to finish all repeated transmission of the same audio data. As long as the channel condition between any one transmitting antenna and the destination device is good, the destination device can more easily and correctly receive at least one piece of audio data, so that the capability of the destination device for receiving the audio data is greatly improved, and the capability of the source device for sharing music to each destination device is improved. In summary, the audio broadcast source device of the present application sends audio data to a destination device in a different manner from the conventional audio data sending manner.
Fig. 11 shows a flowchart of an audio sharing method under different numbers of transmitting antennas according to an embodiment of the present application. As shown in fig. 11, starting at step S1101, different audio data sets the number of times of repeated transmission by the audio broadcast source device, respectively. For example, it is set by the audio broadcast source device that audio data is repeatedly transmitted 4 times, 6 times, and the like. Different audio data the number of times of repeated transmission may be the same or different in different cases.
Next, there are two cases, step S1102a and step S1102b, respectively, where n < m corresponds to step S1102a, and the set number of times of repeated transmission of audio data is larger than the number of at least two transmission antennas so that each transmission antenna is assigned to at least one repeated transmission of the audio data. The number of repeated transmission times n of the same audio data is smaller than the number m of transmitting antennas. The set number of times of the repeated transmission of the audio data is smaller than the number of the at least two transmitting antennas, and each repeated transmission of the audio data is performed by a different transmitting antenna. Specifically, the time-division transmission of the same audio data is performed by n transmitting antennas of the m transmitting antennas in a time-division manner. The n transmitting antennas are optionally arranged in the m transmitting antennas, or the repeated transmission of the same audio data is performed according to the n transmitting antennas which are already marked, for example, certain transmitting antennas with certain intervals can be selected to perform in an airport, a gymnasium and the like. Therefore, the n transmitting antennas respectively execute one-time repeated transmission of the same audio data, the n transmitting antennas are respectively positioned at different positions, the destination terminal equipment only needs to correctly receive a certain repeated transmission of the same audio data, and the reliability of audio broadcast transmission is improved.
n > m corresponds to step S1102b, where the set number of times of repeated transmission of audio data is smaller than the number of at least two transmitting antennas, each repeated transmission of audio data being performed by a different transmitting antenna. As shown in fig. 5, the number of times n that the same audio data is repeatedly transmitted is greater than the number m of transmitting antennas. The set number of repeated transmission of the audio data is greater than the number of the at least two transmission antennas, such that each transmission antenna is assigned to at least one repeated transmission of the audio data. Specifically, the first m times of the repeated transmission of the same audio data are completed by m transmitting antennas in a time-sharing manner. And the same audio data is repeatedly sent for the last n-m times, and then the sending is executed by the optional n-m sending antennas in the m sending antennas or executed according to the set n-m sending antennas. If n-m is still larger than m, the time-sharing transmission is continued by using different m transmitting antennas until all the repeated transmission times are finished finally. One or more of the antennas performs one or more repeated transmissions of the same audio data. The destination terminal equipment only needs to correctly receive a certain repeated transmission of the same audio data, and the reliability of audio broadcast transmission is improved.
In some embodiments of the present application, the audio data comprises audio data transmitted by LE audio broadcasting. By the aid of the audio broadcast source end device, the reliability of LE audio broadcast transmission can be improved. The receiving party only needs to correctly receive the LE audio data at a certain time.
In some embodiments of the present application, the audio data comprises a Payload Data Unit (PDU) carried in a BIS by audio data transmitted by LE audio broadcasting, and the at least two transmit antennas cooperate to perform retransmission timing of the PDU. LE audio proposes an LE audio synchronized broadcast group (BIG) to support audio sharing, where the BIG includes BIS carrying Payload Data Units (PDUs) provided for broadcasting. At least two transmit antennas cooperate to perform retransmission timing of the PDUs.
In some embodiments of the present application, at least two transmit antennas follow the same retransmission timing or complementary retransmission timing of the PDU, such that multiple retransmissions of the same PDU are performed time-divisionally by different transmit antennas. Multiple retransmissions of a PDU can eventually be completed with the same retransmission timing or with complementary retransmission timing. The loss of the audio signal received by the destination device is reduced, so that the pause or noise when the destination device plays the audio is avoided.
In some embodiments of the present application, the audio sharing method further includes: the at least two transmission antennas perform retransmission timing of the PDUs in order. For example according to P0, P0, P0, P0, P0; p1, P1, P1, P1, P1; p2, P2, P2, P2, P2; … to transmit the PDUs of the BIS. In the synchronized broadcast group of LE audio, the BIS parameter may be configured such that the PTO becomes 0. The at least two transmitting antennas of the audio broadcast source end device are located at different positions or have different postures or directivities, so that channels between the at least two transmitting antennas and the receiving antenna of the destination end have lower correlation, and for the same PDU, the audio broadcast source end device executes in a time-sharing mode by using the at least two transmitting antennas. This can overcome the situation that the channel between a source device and a destination device is relatively short, and even the channel between a transmitting antenna and the destination device is relatively short or poor all the time, because the channel between other transmitting antennas and the destination device may be relatively good. Meanwhile, the at least two transmitting antennas sequentially execute the retransmission time sequence of the PDU, thereby reducing the broadcasting time delay and reducing the size of the broadcasting transmission buffer.
In some embodiments of the present application, the audio data comprises audio data processed in an LC3/LC3+ encoding manner. The source device compresses audio data in an LC3/LC3+ encoding mode (Encode), and then as a broadcast source, transmits broadcast information in a BIS mode to a destination device (e.g., wireless headset, wireless sound box), and the destination device can receive the broadcast audio BIS, then decode and play the audio. The LC3/LC3+ coding mode can provide higher sound quality under the condition of the same bit rate. In addition, the audio broadcast source device may also support other encoding modes, such as an SBC encoding mode.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (16)
1. An audio broadcast source device, characterized in that the audio broadcast source device comprises:
at least two transmitting antennas, the at least two transmitting antennas being located at different positions or having different attitudes;
a wireless communication module supporting broadcasting, the wireless communication module configured to: and the at least two transmitting antennas are enabled to cooperatively execute repeated transmission of the set times of the audio data, so that the repeated transmission of the set times of the same audio data is executed by different transmitting antennas in a time-sharing manner.
2. The audio broadcast source device of claim 1, wherein the set number of times of the repeated transmission of the audio data is larger than the number of the at least two transmitting antennas, so that each transmitting antenna is assigned to at least one repeated transmission of the audio data.
3. The audio broadcast source device of claim 1, wherein the set number of times of the repeated transmission of the audio data is smaller than the number of the at least two transmitting antennas, and each repeated transmission of the audio data is performed by a different transmitting antenna.
4. The audio broadcast source device of claim 1, wherein the wireless communication module comprises an LE audio module, and wherein the audio data comprises audio data transmitted by LE audio broadcast.
5. The audio broadcast source device of claim 4, wherein the audio data transmitted by the LE audio broadcast is carried in Payload Data Units (PDUs) in BISs, and wherein the LE audio module is configured to enable the at least two transmit antennas to cooperatively perform retransmission timing of the PDUs.
6. The audio broadcast source device of claim 5, wherein the causing of the at least two transmitting antennas to cooperatively perform the retransmission timing of the PDU specifically comprises: such that the at least two transmit antennas follow the same retransmission timing or complementary repetition timing of the PDU, such that multiple retransmissions of the same PDU are performed time-divisionally by different transmit antennas.
7. The audio broadcast source device of claim 5, wherein the LE audio module is further configured to cause the at least two transmit antennas to perform retransmission timing of PDUs in sequence.
8. The audio broadcast source device of claim 1, wherein the audio data comprises audio data processed in LC3/LC3+ encoding.
9. An audio sharing method applied to an audio broadcast source device, wherein the audio broadcast source device comprises at least two transmitting antennas, and the at least two transmitting antennas are located at different positions or have different postures,
setting, by the audio broadcast source end device, the number of times of repeated transmission for different audio data, respectively;
the audio broadcast source end device performs the repeated transmission of the set number of times of audio data using the at least two transmitting antennas in cooperation, so that the repeated transmission of the set number of times of the same audio data is performed by different transmitting antennas at different times.
10. The audio sharing method according to claim 9, wherein the set number of times of the repeated transmission of the audio data is larger than the number of the at least two transmission antennas, such that each transmission antenna is assigned to at least one repeated transmission of the audio data.
11. The audio sharing method according to claim 9, wherein the set number of times of the repeated transmission of the audio data is smaller than the number of the at least two transmitting antennas, and each repeated transmission of the audio data is performed by a different transmitting antenna.
12. The audio sharing method of claim 9, wherein the audio data comprises audio data transmitted by LE audio broadcasting.
13. The audio sharing method of claim 12, wherein the audio data comprises a Payload Data Unit (PDU) carried in a BIS by audio data transmitted by LE audio broadcasting, and the at least two transmitting antennas cooperate to perform retransmission timing of the PDU.
14. The audio sharing method of claim 13, wherein the at least two transmitting antennas cooperatively performing retransmission timing of PDUs specifically comprises: such that the at least two transmit antennas follow the same retransmission timing or complementary retransmission timing of the PDU, such that multiple retransmissions of the same PDU are performed time-divisionally by different transmit antennas.
15. The audio sharing method according to claim 13, further comprising: the at least two transmission antennas perform retransmission timing of the PDUs in order.
16. The audio sharing method according to claim 9, wherein the audio data comprises audio data processed by LC3/LC3+ encoding.
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