CN113328817A - LE broadcast audio stream fast forward and backward method, device, system, medium and equipment - Google Patents
LE broadcast audio stream fast forward and backward method, device, system, medium and equipment Download PDFInfo
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- CN113328817A CN113328817A CN202110883436.XA CN202110883436A CN113328817A CN 113328817 A CN113328817 A CN 113328817A CN 202110883436 A CN202110883436 A CN 202110883436A CN 113328817 A CN113328817 A CN 113328817A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04H20/18—Arrangements for synchronising broadcast or distribution via plural systems
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Abstract
The application discloses a method, a device, a system, a medium and equipment for fast forward and backward of an LE (LE) broadcast audio stream, and belongs to the technical field of LE audio broadcast. The method mainly comprises the following steps: acquiring fast forward or fast backward time of a broadcast audio stream; determining synchronous offset time of a plurality of other broadcast stream channels and the current broadcast stream channel according to the initial offset time of the current broadcast audio stream corresponding to the current broadcast stream channel which is listened to by the broadcast listening equipment and the initial offset time of other broadcast audio streams corresponding to the other broadcast stream channels; and selecting a target broadcast stream channel corresponding to the fast forward or fast backward time from a plurality of other broadcast stream channels according to the relation between the fast forward or fast backward time and the synchronous offset time, and synchronously listening. By selecting the broadcast stream channel corresponding to the fast forward or fast backward time from the plurality of broadcast stream channels according to the fast forward or fast backward time, the user can listen to the broadcast audio stream after the fast forward or fast backward without influencing the listening of other users.
Description
Technical Field
The present application relates to the field of LE audio broadcasting, and in particular, to a method, an apparatus, a system, a medium, and a device for fast forward/backward of an LE broadcast audio stream.
Background
LE Audio is a new generation of bluetooth Audio, and a new important characteristic different from the conventional bluetooth Audio is Audio broadcasting, which changes the original small data communication topologies such as point-to-point Audio, short data broadcasting (without Audio), mesh network, etc., and enables a single Audio source device to broadcast multiple Audio streams to an unlimited number of bluetooth Audio receiving devices. Broadcast audio when turned on, any range of audio receiving devices may join the listening. Broadcast audio opens new opportunities for more innovative usage scenarios.
LE Audio broadcasting, which provides up to 31 BIS (broadcast Isochronous stream) broadcast synchronization streams under a single BIG (broadcast Isochronous group) broadcast synchronization group by means of Periodic broadcasting (PA). The broadcasting source equipment is allowed to broadcast a plurality of broadcasting audio streams, and the use scene of broadcasting multiple languages and multiple channels is realized. With the PA-based BASE architecture, a broadcast source node exposes its information about broadcast audio streams, including the type of broadcast audio stream (music, voice, phone, announcement, etc.), details of the multiple BIS audio streams (Metadata) such as language, channel location, encoding format, configuration, etc., to the broadcast listening device.
In the prior art, the broadcasting based on the LE audio may implement applications such as a museum exhibit interpreter, and a user may obtain a BIS audio stream that is offset from zero in the near future by using the start offset time of the BIS audio stream in the broadcasting device of the LE audio, so that the user may start listening to the introduction of the exhibit in the museum as close as possible to 0 minute offset. However, because the broadcasting mode of LE audio is unidirectional transmission, the broadcasting receiving end cannot use the standard protocol to control the broadcasting source to fast forward or rewind, and if the broadcasting audio source device changes the broadcasting audio stream itself, other users listening to the broadcasting will be affected.
Disclosure of Invention
The application mainly provides a method, a device, a system, a medium and equipment for fast forward and fast backward of LE broadcast audio stream, aiming at the problems that the broadcast receiving end in the prior art can not control the broadcast source to fast forward or backward by using a standard protocol, and other users listening to the broadcast can be influenced if the broadcast audio source equipment changes the broadcast audio stream.
In order to achieve the above object, the present application adopts a technical solution that: provided is a LE broadcast audio stream fast forward and backward method, which comprises the following steps: acquiring fast forward or fast backward time of a broadcast audio stream; determining synchronous offset time between a plurality of other broadcast stream channels and a current broadcast stream channel according to the initial offset time of the current broadcast audio stream corresponding to the current broadcast stream channel which is listened to by the broadcast listening equipment currently and the initial offset time of other broadcast audio streams corresponding to the plurality of other broadcast stream channels respectively, wherein the initial offset time of the current broadcast audio stream is the initial playing time of the current broadcast audio stream, and the initial offset time of the other broadcast audio streams is the initial playing time of the other broadcast audio streams; and selecting a target broadcast stream channel corresponding to the fast forward or fast backward time from a plurality of other broadcast stream channels according to the relation between the fast forward or fast backward time and the synchronous offset time, and synchronously listening.
Another technical scheme adopted by the application is as follows: an LE broadcast audio stream fast forward and backward apparatus is provided, which includes: a module for obtaining a fast forward or fast reverse time of a broadcast audio stream; a module configured to determine synchronous offset times between a plurality of other broadcast stream channels and a current broadcast stream channel according to a start offset time of a current broadcast audio stream corresponding to a current broadcast stream channel currently being listened to by a broadcast listening device and start offset times of other broadcast audio streams corresponding to the plurality of other broadcast stream channels, where the start offset time of the current broadcast audio stream is a start playing time of the current broadcast audio stream, and the start offset times of the other broadcast audio streams are start playing times of the other broadcast audio streams; and a module for selecting a target broadcast stream channel corresponding to the fast forward or fast backward time among the plurality of other broadcast stream channels according to the relationship between the fast forward or fast backward time and the synchronization offset time, and performing synchronous listening.
Another technical scheme adopted by the application is as follows: there is provided an LE broadcast audio stream fast forward/backward system, comprising: the broadcasting source equipment is used for circularly playing the broadcasting audio streams with different initial offset time in the plurality of broadcasting stream channels according to the plurality of pre-created broadcasting stream channels and different initial playing time preset for the broadcasting audio streams; the broadcast listening equipment is used for receiving broadcast audio streams of a plurality of broadcast stream channels from the broadcast source equipment, selecting a target broadcast stream channel corresponding to the fast forward or fast backward time according to the fast forward or fast backward time of the broadcast audio streams required by users, and synchronously listening.
Another technical scheme adopted by the application is as follows: a computer-readable storage medium is provided that stores computer instructions operable to perform the LE broadcast audio stream fast forward rewind method of scheme one.
Another technical scheme adopted by the application is as follows: there is provided a computer device comprising a processor and a memory, the memory storing computer instructions operable to perform a LE broadcast audio stream fast forward/rewind method of scheme one.
The technical scheme of the application can reach the beneficial effects that: the application designs a method, a device, a system, a medium and equipment for fast forward and backward of LE broadcast audio stream. The broadcasting stream channel corresponding to the fast forward or fast backward time is selected from a plurality of broadcasting stream channels according to the fast forward or fast backward time, and the broadcasting stream channel is used as a target broadcasting stream channel for synchronous listening, so that a user can listen to the broadcasting audio stream after the fast forward or fast backward as required under the condition of not influencing the listening of other users.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic flow chart diagram illustrating an embodiment of a fast forward/rewind method for an LE broadcast audio stream according to the present application;
fig. 2 is a schematic diagram of an embodiment of an LE broadcast audio stream fast forward/rewind apparatus according to the present application;
fig. 3 is a schematic diagram of an embodiment of a fast forward/backward system for LE broadcast audio streams according to the present application.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, will provide those skilled in the art with a better understanding of the advantages and features of the present application, and will make the scope of the present application more clear and definite.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the prior art, the broadcasting based on the LE audio may implement applications such as a museum exhibit interpreter, and a user may obtain a BIS audio stream that is offset from zero in the near future by using the start offset time of the BIS audio stream in the broadcasting device of the LE audio, so that the user may start listening to the introduction of the exhibit in the museum as close as possible to 0 minute offset. However, since the broadcasting mode of the LE audio is unidirectional transmission, the broadcasting receiving end cannot control the broadcasting source to fast forward or rewind by using a standard protocol, and if the broadcasting audio source device changes the broadcasting audio stream itself, other users listening to the broadcasting can be affected.
The invention conception of the application is as follows: according to the fast forward or fast backward time required by the user, selecting a target broadcast stream channel corresponding to the fast forward or fast backward time from broadcast stream channels corresponding to a plurality of broadcast audio streams with different initial playing times received by the broadcast listening equipment of the broadcast listening equipment, and synchronously listening to the broadcast audio stream broadcasted by the broadcast stream channel, so that the user can listen to the broadcast audio stream after the required fast forward or fast backward without influencing the listening of other users.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
Fig. 1 shows an embodiment of a fast forward/backward method for an LE broadcast audio stream according to the present application.
In the specific embodiment shown in fig. 1, the LE broadcast audio stream fast forwarding and rewinding method of the present application mainly includes step S101, obtaining fast forwarding or fast rewinding time of a broadcast audio stream; step S102, determining synchronous offset time between a plurality of other broadcast stream channels and a current broadcast stream channel according to the initial offset time of the current broadcast audio stream corresponding to the current broadcast stream channel which is listened to by the broadcast listening equipment and the initial offset time of other broadcast audio streams corresponding to the other broadcast stream channels, wherein the initial offset time of the current broadcast audio stream is the initial playing time of the current broadcast audio stream, and the initial offset time of the other broadcast audio streams is the initial playing time of the other broadcast audio streams; and step S103, selecting a target broadcast stream channel corresponding to the fast forward or fast backward time from a plurality of other broadcast stream channels according to the relation between the fast forward or fast backward time and the synchronous offset time, and synchronously listening.
In the specific implementation mode, fast-forward or fast-backward time set by a user according to requirements is acquired, a broadcast listening device receives broadcast audio streams of different starting offset times of synchronous playing of a plurality of broadcast stream channels from a broadcast source device, according to the starting offset time of the broadcast audio streams in the broadcast stream channels, synchronous offset time between a current broadcast stream channel currently being listened to in the broadcast listening device and a plurality of other broadcast stream channels is determined, according to the relation between the fast-forward or fast-backward time and the synchronous offset time, a target broadcast stream channel corresponding to the fast-forward or fast-backward time is selected from the plurality of other broadcast stream channels, and synchronous listening is performed. The user can listen to the broadcast audio stream broadcasted by the target broadcast stream channel needing fast forward or fast backward without influencing the listening of other users.
In the embodiment shown in fig. 1, the LE broadcast audio stream fast forwarding and rewinding method mainly includes step S101, obtaining fast forwarding or fast rewinding time of the broadcast audio stream.
In this embodiment, the fast forward or fast backward time set by the user is not greater than the total time length of the broadcast audio stream, so that the amount of calculation performed in the subsequent steps according to the fast forward or fast backward time is reduced.
In a specific example of the present application, for a broadcast audio stream about tourist attraction commentary with a time length of 30 seconds, if a 15 th second broadcast audio stream is currently being played and the fast forward or fast backward time set by the user is fast forward for 5 seconds, the fast forward or fast backward time is obtained, that is, fast forward for 5 seconds; it is known that the user desires to listen to the 20 th second broadcast audio stream. And acquiring the fast forward or fast backward time set by the broadcast audio stream required by the user so as to perform corresponding processing according to the user requirement.
In a specific embodiment of the present application, obtaining the fast forward or fast backward time of the broadcast audio stream further includes: creating a broadcast group, and obtaining a plurality of broadcast stream channels, wherein the broadcast stream channels comprise a current broadcast stream channel and a plurality of other broadcast stream channels; according to a preset broadcast rule, different initial playing time is preset for the broadcast audio stream, so that in the broadcast source equipment, a plurality of broadcast stream channels respectively play the broadcast audio streams with different initial offset time in a circulating manner.
In this embodiment, a broadcast group is first created, and a plurality of broadcast stream channels are obtained, where the number of broadcast stream channels may be determined according to the time length of broadcasting an audio stream and a broadcast source device; the broadcasting source equipment respectively plays the broadcasting audio streams with different initial offset time in a circulating mode in the plurality of broadcasting stream channels, so that a user can select a proper broadcasting audio stream channel whenever the user starts to listen to the broadcasting audio stream, the user can listen to the broadcasting audio stream from 0 second as much as possible, and the user experience is improved; and provides conditions for the broadcast listening device to receive broadcast audio streams of different start offset times in subsequent steps.
In a specific embodiment of the present application, presetting different start playing times for a broadcast audio stream according to a preset broadcast rule includes: equally dividing the total time length of the broadcast audio stream by using the number of the broadcast stream channels to obtain time intervals corresponding to the initial offset time of the plurality of broadcast audio streams; the starting playing time of the broadcast audio stream in a plurality of broadcast stream channels is determined according to the time interval, wherein the intervals of the starting playing time in the adjacent broadcast stream channels are the same.
In a specific example of the present application, for a broadcast audio stream about tourist attraction commentary with a time length of 30 seconds, 6 broadcast stream channels may be created, and the 6 broadcast stream channels are respectively made to cyclically play broadcast audio streams with different start offset times, wherein a first broadcast stream channel plays a broadcast audio stream from 0 second, a second broadcast stream channel plays a broadcast audio stream from 5 second, a third broadcast stream channel plays a broadcast audio stream from 10 second, a fourth broadcast stream channel plays a broadcast audio stream from 15 second, a fifth broadcast stream channel plays a broadcast audio stream from 20 second, and a sixth broadcast stream channel plays a broadcast audio stream from 25 second. Since the time length of the broadcast audio stream is 30 seconds, the number of the broadcast stream channels is 6, and the start offset time interval of the broadcast audio stream is 5 seconds, the 6 broadcast stream channels respectively cyclically play the broadcast audio stream with the start offset time of 0 second, the broadcast audio stream with the start offset time of 5 seconds, the broadcast audio stream with the start offset time of 10 seconds, the broadcast audio stream with the start offset time of 15 seconds, the broadcast audio stream with the start offset time of 20 seconds, and the broadcast audio stream with the start offset time of 25 seconds.
In the specific embodiment shown in fig. 1, the LE broadcast audio stream fast forwarding and rewinding method further includes step S102, determining synchronization offset times between a plurality of other broadcast stream channels and a current broadcast stream channel according to a start offset time of the current broadcast audio stream corresponding to a current broadcast stream channel currently being listened to by the broadcast listening device and start offset times of other broadcast audio streams corresponding to the plurality of other broadcast stream channels, respectively, where the start offset time of the current broadcast audio stream is a start playing time of the current broadcast audio stream, and the start offset times of the other broadcast audio streams are start playing times of the other broadcast audio streams.
In this embodiment, according to the start offset time of each of the broadcast audio streams corresponding to a plurality of broadcast stream channels, the synchronization offset time between the current broadcast stream channel of the current broadcast audio stream currently being listened to by the broadcast listening device and a plurality of other broadcast stream channels is determined, and after the target broadcast stream channel corresponding to the fast forward or fast backward time is obtained in the subsequent step, the broadcast listening device provides a condition for switching the current broadcast stream channel to the target broadcast stream channel.
In one embodiment of the present application, determining synchronization offset times between a plurality of other broadcast stream channels and a current broadcast stream channel according to a start offset time of the current broadcast audio stream corresponding to the current broadcast stream channel currently being listened to by a broadcast listening device and start offset times of other broadcast audio streams corresponding to the plurality of other broadcast stream channels respectively comprises: and respectively calculating the time difference between the starting offset time of the other broadcast audio streams and the starting offset time of the current broadcast audio stream to obtain the synchronous offset time of the other broadcast stream channels relative to the broadcast stream channel.
In a specific example of the present application, for a broadcast audio stream about tourist attraction commentary with a time length of 36 seconds, a broadcast group is first created, preferably, 6 broadcast stream channels are created, and the 6 broadcast stream channels are made to circularly play the broadcast audio streams with start offset times of 0 th second, 6 th second, 12 th second, 18 th second, 24 th second and 30 th second, respectively. If the broadcast listening device is currently listening to the broadcast stream with the initial offset time of 12 seconds, the synchronization offset time between the broadcast channel of the broadcast audio stream with the initial offset time of 0 second and the broadcast stream channel of the broadcast stream with the initial offset time of 12 seconds is-12 seconds, the synchronization offset time between the broadcast channel of the broadcast audio stream with the initial offset time of 6 seconds and the broadcast stream channel of the broadcast stream with the initial offset time of 12 seconds is-6 seconds, the synchronization offset time between the broadcast channel of the broadcast audio stream with the initial offset time of 18 seconds and the broadcast stream channel of the broadcast stream with the initial offset time of 12 seconds is 6 seconds, the synchronization offset time between the broadcast channel of the broadcast audio stream with the initial offset time of 24 seconds and the broadcast stream channel of the broadcast stream with the initial offset time of 12 seconds is 12 seconds, the synchronization offset time between the broadcast channel on which the broadcast audio stream with the start offset time of 30 seconds is located and the broadcast stream channel on which the broadcast audio stream with the start offset time of 12 seconds is located is 18 seconds.
In the specific embodiment shown in fig. 1, the LE broadcast audio stream fast forwarding and rewinding method of the present application further includes step S103, selecting a target broadcast stream channel corresponding to the fast forwarding or fast rewinding time from a plurality of other broadcast stream channels according to a relationship between the fast forwarding or fast rewinding time and the synchronization offset time, and performing synchronous listening.
In this specific embodiment, according to the fast forward or fast backward time and the synchronous offset time respectively obtained as described above, a target broadcast stream channel corresponding to the fast forward or fast backward time is selected from a plurality of other broadcast stream channels, and a broadcast audio stream played by the target broadcast stream channel is synchronously listened to, where the broadcast audio stream is a broadcast audio stream corresponding to a current broadcast audio stream required by a user after the fast forward or fast backward time, so as to achieve a purpose of user demand and improve user experience.
In one embodiment of the present application, selecting a target broadcast stream channel corresponding to a fast forward or fast rewind time from a plurality of other broadcast stream channels for synchronous listening according to a relationship between the fast forward or fast rewind time and a synchronization offset time, includes: calculating the time difference between the fast forward time or the fast backward time and a plurality of synchronous offset times respectively; determining other broadcast stream channels corresponding to the time difference within the preset time range as target broadcast stream channels; the broadcast listening device synchronously listens to the broadcast audio stream played by the target broadcast stream channel.
In one embodiment of the present application, for a broadcast audio stream with a length of 36 seconds for tourist attraction commentary, if the broadcast listening device is currently listening to the broadcast stream with a start offset time of 12 seconds, since the user sets fast rewind for 3 seconds, namely, the fast forward or fast backward time is-3 seconds, the broadcast audio stream of the 9 th second needs to be listened to synchronously, the time difference between the synchronous offset time-12 seconds and the fast forward or fast backward time-3 seconds is-9 seconds, the time difference between the synchronous offset time-6 seconds and the fast forward or fast backward time-3 seconds is-3 seconds, the time difference between the synchronous offset time-6 seconds and the fast forward or fast backward time-3 seconds is 9 seconds, the time difference between the synchronous offset time-12 seconds and the fast forward or fast backward time-3 seconds is 15 seconds, and the time difference between the synchronous offset time-18 seconds and the fast forward or fast backward time-3 seconds is 21 seconds. Setting the preset time range as [ -3, 3], setting the time difference in the preset time range as the corresponding broadcast stream channel as the target broadcast stream channel, namely playing the broadcast audio stream with the start offset time of 6 seconds by the broadcast stream channel with the time difference of-3 seconds, and synchronously listening to the broadcast audio stream played by the target broadcast stream channel by the broadcast listening device.
It should be noted that, the setting of the preset time range is reasonably set according to the initial offset time difference of the broadcast audio stream played by two adjacent broadcast stream channels in the actual broadcast stream channels, and the span of the preset time range is not greater than the time difference.
According to the LE broadcast audio stream fast forward and fast backward method, the broadcast audio streams with different initial offset times are played through the broadcast stream channels, the listening requirements of fast forward and fast backward when a user listens to the broadcast synchronously are met through switching of the broadcast stream channels, and user experience is improved.
Fig. 2 shows an embodiment of an LE broadcast audio stream fast forward/backward apparatus according to the present application.
In the embodiment shown in fig. 2, the LE broadcast audio stream fast forward/backward apparatus mainly includes: a module 201 for obtaining a fast forward or fast backward time of a broadcast audio stream; a module 202 configured to determine synchronous offset times between a plurality of other broadcast stream channels and a current broadcast stream channel according to a start offset time of a current broadcast audio stream corresponding to a current broadcast stream channel currently being listened to by a broadcast listening device and start offset times of other broadcast audio streams corresponding to the plurality of other broadcast stream channels, where the start offset time of the current broadcast audio stream is a start playing time of the current broadcast audio stream, and the start offset times of the other broadcast audio streams are start playing times of the other broadcast audio streams; and a module 203 for selecting a target broadcast stream channel corresponding to the fast forward or fast backward time from the plurality of other broadcast stream channels according to the relationship between the fast forward or fast backward time and the synchronization offset time, and performing synchronous listening.
In a specific example of the present application, for broadcast audio streams introduced by a product with a duration of 62 seconds, where a broadcast group includes 31 broadcast stream channels, the broadcast audio streams of the 31 broadcast stream channels are respectively played cyclically with different start offset times, where the broadcast audio streams of the 31 broadcast stream channels are numbered sequentially from small to large, a difference between the start offset times of two adjacent broadcast stream channels is 2 seconds, a first broadcast stream channel broadcasts a broadcast audio stream with a start offset time of 0 second, and a thirty-first broadcast stream channel broadcasts a broadcast audio stream with a start offset time of 60 seconds. The broadcast listening device currently plays a broadcast audio stream with a start offset time of 10 seconds, which corresponds to the sixth broadcast stream channel that is playing the 10 th second broadcast audio stream. If the fast forward or fast backward time set by the user is set as fast forward 6 seconds, namely the broadcast audio stream required to be listened to by the user is the 16 th second; calculating time difference values between the 10 seconds of the starting offset time of the broadcast audio stream of the currently played sixth broadcast stream channel and the starting offset times of the broadcast audio streams of the other 30 broadcast stream channels respectively, obtaining the synchronous offset times of the other 30 broadcast stream channels relative to the sixth broadcast stream channel respectively, calculating the time difference between each synchronous offset time and the fast forward time of 6 seconds respectively, and comparing the time difference with a preset time range set to be [ -1, 1], thus obtaining that the broadcast audio stream of the ninth broadcast stream channel can meet the user requirements. The number of the broadcast stream channel is switched by 3 in the direction of increasing from the current number so that the broadcast stream channel currently being broadcast is changed from the sixth broadcast stream channel to the ninth broadcast stream channel. Similarly, if the fast forward or fast backward time set by the user is set as fast backward for 6 seconds, that is, the broadcast audio stream that the user needs to listen to is the 4 th second; calculating time difference values between the 10 seconds of the initial offset time of the broadcast audio stream of the currently played broadcast stream channel and the initial offset times of the broadcast audio streams of the other 30 broadcast stream channels respectively, obtaining the synchronous offset time of the other 30 broadcast stream channels relative to the sixth broadcast stream channel respectively, calculating the time difference between each synchronous offset time and the time difference of the fast backward for 6 seconds respectively, and comparing the time difference with a preset time range set to be [ -1, 1], so that the broadcast audio stream of the third broadcast stream channel can meet the user requirements. The number of the broadcast stream channel is switched 3 in a direction of decreasing from the current number so that the broadcast stream channel currently being broadcast is changed from the sixth broadcast stream channel to the third broadcast stream channel.
In a specific embodiment of the present application, the functional modules in an LE broadcast audio stream fast forward/backward apparatus of the present application may be directly in hardware, in a software module executed by a processor, or in a combination of the two.
A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
The Processor may be a Central Processing Unit (CPU), other general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), other Programmable logic devices, discrete Gate or transistor logic, discrete hardware components, or any combination thereof. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.
The LE broadcast audio stream fast forwarding and rewinding device provided by the present application may be used to execute the LE broadcast audio stream fast forwarding and rewinding method described in any of the above embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 3 shows a specific embodiment of a fast forward/backward system for LE broadcast audio streams according to the present application.
In the embodiment shown in fig. 3, the LE broadcast audio stream fast forward/backward system mainly includes: the broadcast source device of the module 301 is configured to cyclically play the broadcast audio streams with different initial offset times in the plurality of broadcast stream channels according to the plurality of pre-created broadcast stream channels and different initial play times preset for the broadcast audio streams; and a broadcast listening device of the module 302, configured to receive broadcast audio streams from multiple broadcast stream channels of the broadcast source device, and select a target broadcast stream channel corresponding to a fast forward or fast backward time of the broadcast audio stream according to a fast forward or fast backward time required by a user, so as to perform synchronous listening.
In this embodiment, a broadcast group is first created, and a plurality of broadcast stream channels are obtained, where the number of broadcast stream channels may be determined according to the time length of broadcasting an audio stream and a broadcast source device; the broadcasting source equipment respectively plays the broadcasting audio streams with different initial offset time in a circulating mode in the plurality of broadcasting stream channels, so that a user can select a proper broadcasting audio stream channel whenever the user starts to listen to the broadcasting audio stream, the user can listen to the broadcasting audio stream from 0 second as much as possible, and the user experience is improved; and provides conditions for the broadcast listening device to receive broadcast audio streams of different start offset times in subsequent steps. The method comprises the steps of obtaining fast forward or fast backward time set by a user according to requirements, broadcast audio streams of different starting offset times of synchronous playing of a plurality of broadcast stream channels from broadcast source equipment and received by broadcast listening equipment, determining synchronous offset time between a current broadcast stream channel currently being listened to in the broadcast listening equipment and a plurality of other broadcast stream channels according to the starting offset time of the broadcast audio streams in the broadcast stream channels, and selecting a target broadcast stream channel corresponding to the fast forward or fast backward time from the plurality of other broadcast stream channels according to the relation between the fast forward or fast backward time and the synchronous offset time to carry out synchronous listening. The user can listen to the broadcast audio stream broadcasted by the target broadcast stream channel needing fast forward or fast backward without influencing the listening of other users.
In a specific embodiment of the present application, the broadcast listening device acquires the broadcast audio stream from the target broadcast stream channel in the broadcast source device by means of Metadata in the BASE structure of PA broadcast, EA broadcast, or OOB out-of-band.
In a specific example of the present application, preferably, the broadcast source device may periodically update information in the BASE structure broadcasted by its PA; informing the number of the target broadcast stream channel of the broadcast listening device corresponding to the broadcast source device by using a mode including Metadata; the number of the target broadcast stream channel can be announced through EA broadcast; or inform the number of the target broadcast stream channel (BIS) by means of OOB, such as screen two-dimensional code, etc.
In a specific embodiment of the present application, in a broadcast source device, a fast forward or fast backward time of a broadcast audio stream is obtained; determining synchronous offset time between a plurality of other broadcast stream channels and a current broadcast stream channel according to the initial offset time of the current broadcast audio stream corresponding to the current broadcast stream channel which is listened to by the broadcast listening equipment currently and the initial offset time of other broadcast audio streams corresponding to the plurality of other broadcast stream channels respectively, wherein the initial offset time of the current broadcast audio stream is the initial playing time of the current broadcast audio stream, and the initial offset time of the other broadcast audio streams is the initial playing time of the other broadcast audio streams; and selecting a target broadcast stream channel corresponding to the fast forward or fast backward time from a plurality of other broadcast stream channels according to the relation between the fast forward or fast backward time and the synchronous offset time, and synchronously listening.
In a specific example of the present application, for a broadcast audio stream about tourist attraction commentary with a time length of 10 seconds, the created broadcast group is 5 broadcast stream channels, and each broadcast stream channel respectively broadcasts a broadcast audio stream with a start offset time of 0 th second, a broadcast audio stream with a start offset time of 2 nd second, a broadcast audio stream with a start offset time of 4 th second, a broadcast audio stream with a start offset time of 6 th second, and a broadcast audio stream with a start offset time of 8 th second. If the broadcast stream channel currently listened to by the broadcast listening device is playing the 7 th second broadcast audio stream, and the start offset time of the broadcast stream channel where the broadcast audio stream is located is the 6 th second, the start offset times of the other broadcast stream channels are respectively the 0 th second, the 2 nd second, the 4 th second and the 8 th second. Calculating that the synchronization offset time between the broadcast stream channel of the broadcast audio stream with the initial offset time of 0 second and the broadcast stream channel of the broadcast audio stream with the initial offset time of 6 seconds is-6 seconds, the synchronization offset time between the broadcast stream channel of the broadcast audio stream with the initial offset time of 2 seconds and the broadcast stream channel of the broadcast audio stream with the initial offset time of 6 seconds is-4 seconds, the synchronization offset time between the broadcast stream channel of the broadcast audio stream with the initial offset time of 4 seconds and the broadcast stream channel of the broadcast audio stream with the initial offset time of 6 seconds is-2 seconds, and the synchronization offset time between the broadcast stream channel of the broadcast audio stream with the initial offset time of 8 seconds and the broadcast stream channel of the broadcast audio stream with the initial offset time of 6 seconds is 2 seconds. If the fast forward or fast backward time set by the user is fast backward for 3 seconds, i.e. the 4 th second broadcast audio stream needs to be broadcast, the time difference between the broadcast stream channel with the synchronization offset time of-6 seconds and the fast forward or fast backward time is-3 seconds, the time difference between the broadcast stream channel with the synchronization offset time of-4 seconds and the fast forward or fast backward time is-1 second, the time difference between the broadcast stream channel with the synchronization offset time of-2 seconds and the fast forward or fast backward time is 1 second, and the time difference between the broadcast stream channel with the synchronization offset time of 2 seconds and the fast forward or fast backward time is 5 seconds. If the preset time range is [ -1, 1], taking the broadcast stream channel corresponding to the time difference of-1 second as a target broadcast stream channel, and synchronously listening to the broadcast audio stream played by the channel by the broadcast listening equipment.
The LE broadcast audio stream fast forwarding and rewinding system provided by the present application may be used to execute the LE broadcast audio stream fast forwarding and rewinding method described in any of the above embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
In another embodiment of the present application, a computer-readable storage medium stores computer instructions that are operable to perform the LE broadcast audio stream fast forward and rewind method described in any of the above embodiments.
In a particular embodiment of the present application, a computer device includes a processor and a memory, the memory storing computer instructions that are operative to perform the LE broadcast audio stream fast forward/rewind method described in any of the above embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and all equivalent structural changes made by using the contents of the specification and the drawings, which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (10)
1. An LE broadcast audio stream fast forward/backward method, comprising:
acquiring fast forward or fast backward time of a broadcast audio stream;
determining synchronous offset time between a plurality of other broadcast stream channels and a current broadcast stream channel according to the initial offset time of the current broadcast audio stream corresponding to the current broadcast stream channel currently listened to by a broadcast listening device and the initial offset time of other broadcast audio streams corresponding to the other broadcast stream channels, wherein the initial offset time of the current broadcast audio stream is the initial playing time of the current broadcast audio stream, and the initial offset time of the other broadcast audio streams is the initial playing time of the other broadcast audio streams; and
and selecting a target broadcast stream channel corresponding to the fast forward or fast backward time from the other broadcast stream channels according to the relation between the fast forward or fast backward time and the synchronous offset time, and carrying out synchronous listening.
2. The LE broadcast audio stream fast forward/backward method according to claim 1, wherein said determining synchronization offset times between a plurality of other broadcast stream channels and the current broadcast stream channel according to a start offset time of the current broadcast audio stream corresponding to the current broadcast stream channel currently being listened to by a broadcast listening device and start offset times of other broadcast audio streams corresponding to the other broadcast stream channels, respectively, comprises:
and respectively calculating time difference values of the starting offset time of the other broadcast audio streams and the starting offset time of the current broadcast audio stream to obtain the synchronous offset time of the other broadcast stream channels relative to the broadcast stream channel.
3. The LE broadcast audio stream fast forwarding/rewinding method according to claim 1, wherein said selecting a target broadcast stream channel corresponding to the fast forwarding/rewinding time among a plurality of other broadcast stream channels for synchronous listening according to the relationship between the fast forwarding/rewinding time and the synchronization offset time comprises:
calculating the time difference between the fast forward time or the fast backward time and a plurality of synchronous offset times respectively;
determining the other broadcast stream channels corresponding to the time difference within a preset time range as the target broadcast stream channel;
and the broadcast listening equipment synchronously listens the broadcast audio stream played by the target broadcast stream channel.
4. The LE broadcast audio stream fast forward or fast backward method of claim 1, wherein said obtaining the fast forward or fast backward time of the broadcast audio stream is preceded by:
creating a broadcast group, and obtaining a plurality of broadcast stream channels, wherein the broadcast stream channels comprise the current broadcast stream channel and a plurality of other broadcast stream channels;
according to a preset broadcast rule, different initial playing time is preset for the broadcast audio stream, so that in broadcast source equipment, a plurality of broadcast stream channels respectively play the broadcast audio streams with different initial offset time in a circulating manner.
5. The LE broadcast audio stream fast forwarding/rewinding method according to claim 4, wherein said presetting different starting playing times for the broadcast audio stream according to a preset broadcast rule comprises:
dividing the total time length of the broadcast audio stream equally by using the number of the broadcast stream channels to obtain time intervals corresponding to the initial offset time of a plurality of broadcast audio streams;
determining the starting playing time of the broadcast audio stream in a plurality of broadcast stream channels according to the time interval, wherein the intervals of the starting playing time in the adjacent broadcast stream channels are the same.
6. An LE broadcast audio stream fast forward/backward apparatus, comprising:
a module for obtaining a fast forward or fast reverse time of a broadcast audio stream;
a module configured to determine synchronization offset times between a plurality of other broadcast stream channels and a current broadcast stream channel according to a start offset time of the current broadcast audio stream corresponding to a current broadcast stream channel currently being listened to by a broadcast listening device and start offset times of other broadcast audio streams corresponding to the other broadcast stream channels, where the start offset time of the current broadcast audio stream is a start playing time of the current broadcast audio stream, and the start offset times of the other broadcast audio streams are start playing times of the other broadcast audio streams; and
and a module for selecting a target broadcast stream channel corresponding to the fast forward or fast backward time from the other broadcast stream channels according to the relationship between the fast forward or fast backward time and the synchronous offset time, and performing synchronous listening.
7. An LE broadcast audio stream fast forward/backward system, comprising:
the broadcasting source equipment is used for circularly playing the broadcasting audio streams with different initial offset time in a plurality of broadcasting stream channels according to the plurality of pre-created broadcasting stream channels and different initial playing time preset for the broadcasting audio streams;
and the broadcast listening equipment is used for receiving the broadcast audio streams of the plurality of broadcast stream channels from the broadcast source equipment, selecting a target broadcast stream channel corresponding to the fast forward or fast backward time according to the fast forward or fast backward time of the broadcast audio streams required by users, and synchronously listening.
8. The LE broadcast audio stream fast forward/backward system of claim 7,
in the broadcast source equipment, acquiring the fast forward or fast backward time of the broadcast audio stream;
determining synchronous offset time between a plurality of other broadcast stream channels and a current broadcast stream channel according to the initial offset time of the current broadcast audio stream corresponding to the current broadcast stream channel currently listened to by the broadcast listening equipment and the initial offset time of other broadcast audio streams corresponding to the other broadcast stream channels, wherein the initial offset time of the current broadcast audio stream is the initial playing time of the current broadcast audio stream, and the initial offset time of the other broadcast audio streams is the initial playing time of the other broadcast audio streams; and
and selecting a target broadcast stream channel corresponding to the fast forward or fast backward time from the other broadcast stream channels according to the relation between the fast forward or fast backward time and the synchronous offset time, and carrying out synchronous listening.
9. A computer readable storage medium having stored thereon computer instructions, wherein the computer instructions are operative to perform the LE broadcast audio stream fast forward rewind method of any of claims 1-5.
10. A computer device comprising a processor and a memory, the memory storing computer instructions, wherein the processor operates the computer instructions to perform the LE broadcast audio stream fast forward rewind method of any of claims 1-5.
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| CN202110883436.XA CN113328817A (en) | 2021-08-03 | 2021-08-03 | LE broadcast audio stream fast forward and backward method, device, system, medium and equipment |
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| CN202110883436.XA CN113328817A (en) | 2021-08-03 | 2021-08-03 | LE broadcast audio stream fast forward and backward method, device, system, medium and equipment |
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