CN106341713B - Multimedia synchronous playing method, device, system and terminal - Google Patents

Abstract

The embodiment of the invention provides a multimedia synchronous playing method, a device, a system and a terminal; the embodiment of the invention adopts the media data packet which is played and cached, then detects whether the system clock is synchronous with the system clock of the reference playing device, if not, the current playing progress information of the reference playing device is obtained, the target media data packet which needs to be played currently is determined from the cached media data packet according to the playing progress information, and the target media data packet is played. The scheme can improve the synchronism of multimedia playing among the multimedia playing devices.

Description

A multimedia synchronous playback method, device, system and terminal

technical field

The present invention relates to the technical field of synchronous playback, in particular to a multimedia synchronous playback method, device, system and terminal.

Background technique

With the improvement of living standards, home audio-visual equipment plays an important role in people's lives. At present, it has been widely used to connect multiple multimedia playback devices (for example, speakers, players, etc.) and control devices to each other through a wired or wireless network to form a multimedia playback system, and to play the same multimedia such as music synchronously.

In the above multimedia playing system, each multimedia playing device has an independent clock system. Each playback device plays multimedia according to its own clock system. However, the clock systems of various multimedia playback devices and reference devices (generally control devices) are not always synchronized. There may be a slight time difference between each multimedia playback device and the reference device. When multiple multimedia playback devices play the same music, the above-mentioned slight time difference leads to inconsistencies in the playback progress of each multimedia playback device, thus resulting in relatively low synchronization of multimedia playback among multimedia playback devices.

Contents of the invention

Embodiments of the present invention provide a multimedia synchronous playing method, device, system and terminal, which can improve the synchronization of playing multimedia between multimedia playing devices.

An embodiment of the present invention provides a multimedia synchronous playback method, including:

Play buffered media packets;

Detect whether the system clock is synchronized with the system clock of the reference playback device;

If not, then obtain the current playback progress information of the reference playback device;

From the buffered media data packets according to the playing progress information, determine a target media data packet currently to be played, and play the target media data packet.

Correspondingly, the embodiment of the present invention also provides a multimedia synchronous playback device, including:

A playback unit, configured to play the cached media packets;

A detection unit is used to detect whether the system clock is synchronized with the system clock of the reference playback device;

An acquisition unit, configured to acquire the current playback progress information of the reference playback device when the detection unit detects that the system clock is not synchronized with the system clock of the reference playback device;

The synchronizing unit is configured to determine a target media data packet currently to be played from the buffered media data packets according to the playing progress information, and play the target media data packet.

Correspondingly, the embodiment of the present invention also provides a terminal, including:

a memory storing executable program code;

a processor coupled to the memory;

The processor invokes the executable program code stored in the memory to execute any multimedia synchronous playing method provided by the embodiments of the present invention.

Correspondingly, an embodiment of the present invention also provides a multimedia synchronous playback system, including: a control device and at least one playback device; the control device is connected to the playback device; Any multimedia synchronous playback method.

The embodiment of the present invention adopts playing buffered media data packets, then, detects whether the system clock is synchronized with the system clock of the reference playback device, if not, then obtains the current playback progress information of the reference playback device, according to the playback progress information from Among the buffered media data packets, determine the target media data packets that need to be played currently, and play the target media data packets. This solution can play the media data packet according to the current playback progress information of the reference device when it is not synchronized with the system clock of the reference playback device, so as to realize synchronous playback of multimedia data with the reference playback device. Therefore, compared with the prior art, it can Improve the synchronization of multimedia playback between multimedia playback devices.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

FIG. 1 is a schematic flowchart of a multimedia synchronous playing method provided by Embodiment 1 of the present invention.

FIG. 2 is a schematic diagram of a scene of a multimedia synchronous playback system provided by Embodiment 2 of the present invention.

FIG. 3 is a schematic flowchart of a method for synchronously playing multimedia provided by Embodiment 2 of the present invention.

FIG. 4 is a schematic structural diagram of a first multimedia synchronous playback device provided by Embodiment 3 of the present invention.

FIG. 5 is a schematic structural diagram of a second multimedia synchronous playback device provided by Embodiment 3 of the present invention.

FIG. 6 is a schematic structural diagram of a third multimedia synchronous playback device provided by Embodiment 3 of the present invention.

FIG. 7 is a schematic structural diagram of a fourth multimedia synchronous playback device provided by Embodiment 3 of the present invention.

FIG. 8 is a schematic structural diagram of a terminal provided in Embodiment 4 of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

The terms "first", "second", "third", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily to describe a specific order or sequentially. It should be understood that the items so described are interchangeable under appropriate circumstances. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, a method comprising a series of steps, or a device, a terminal, a system comprising a series of modules or units are not necessarily limited to those steps or modules or units clearly listed, and may also include steps or units not clearly listed. A module or unit may also include other steps or modules or units inherent to these processes, methods, apparatuses, terminals or systems.

Embodiments of the present invention provide a multimedia synchronous playback method, device, system, and terminal, which will be described in detail below.

Embodiment one

This embodiment will be described from the perspective of a multimedia synchronous playback device. The multimedia synchronous playback device can specifically be integrated into a playback device, and the playback device can be a playback device such as a terminal (smart phone, tablet computer, etc.), a speaker, or the like.

A multimedia synchronous playback method, comprising: playing buffered media packets, then detecting whether the system clock is synchronized with the system clock of a reference playback device, if not, obtaining the current playback progress information of the reference playback device, and according to the playback progress The information determines the current target media data package to be played from the cached media data package, and plays the target media data package.

As shown in Figure 1, the multimedia synchronous playback method, the specific process may include:

101. Play the buffered media data packet.

Specifically, a media data packet sent by a control device (such as a control terminal, etc.) or a source device (a server, etc.) may be received, the media data packet may be buffered, and then the buffered media data packet may be played.

Wherein, the media data packet can include: data packet identification (serial number or serial number), the playing time information (time stamp) and the media data segment of the data packet; at this time, the step "playing the buffered media data packet" can include:

Play the media data segment according to the data packet identification (serial number or serial number) in the media data packet, the start playing time information (time stamp) and the system clock.

In this embodiment, the media data packet may be generated using a unified packing rule.

The media data segment may be a fragment or a part of the original media data.

Among them, the format of the media data segment can be various, for example, MP3 (Moving Picture Experts Group Audio Layer III), WMA (Windows Media Audio) and other formats.

102. Detect whether the system clock is synchronized with the system clock of the reference playback device, and if not, perform step 103.

Wherein, the reference playback device can be selected by the control device. For example, the reference playback device can be selected from multiple playback devices. It should be noted that: when the control device also receives the media data distributed by itself to play , the control device is also a playback device. At this time, the reference playback device may be a playback device or a control device.

Specifically, the system clock of the reference device may first be obtained from the parameter playback device, and then, whether the system clock of itself is synchronized with the system clock of the reference playback device is detected.

In this embodiment, there are many ways to detect whether the system clock is synchronized with the system clock of the reference playback device. For example, the time difference between the two system clocks can be obtained first, and then, based on the time difference, it can be determined whether they are synchronized. ; That is, the step "detecting whether the system clock is synchronized with the system clock of the reference playback device" may include:

Obtain the time error between the system clock and the system clock of the reference playback device;

judging whether the time error is greater than a preset threshold;

If it is greater than the preset threshold, it is determined that the system clock is not synchronized with the system clock of the reference playback device;

If not greater than the preset threshold, it is determined that the system clock is synchronized with the system clock of the reference playback device.

That is to say, when the time error is small and does not affect the quality of synchronous playback, it can be considered that the system clock of the playback device is approximately synchronous with the clock of the reference playback device. At this time, there is no need to adjust the synchronous playback; otherwise, if the time error is large, it will affect the synchronous playback When the quality is high, it can be considered that the system clock of the playback device is not synchronized with the reference clock, and a synchronous playback adjustment is required at this time.

Wherein, the preset threshold can be set according to actual needs, for example, it can be set according to the user's tolerance for synchronization difference.

Optionally, in order to improve the playback response speed and shorten the multimedia playback completion time, this embodiment can perform synchronous detection after buffering a certain amount; that is, before step 102, the method of this embodiment may also include:

Get the number of currently cached media packets;

judging whether the quantity is greater than a preset quantity;

If yes, perform the step of detecting whether the system clock is synchronized with the system clock of the reference playback device.

Among them, there are many ways to obtain the number of currently cached media data packets, for example, it can be obtained by counting, that is, the step "obtaining the number of currently cached media data packets" may include:

Count the currently cached media packets to obtain the count value;

Obtain the number of currently buffered media packets according to the count value.

103. Acquire current playback progress information of the reference playback device.

Specifically, a playback progress acquisition request may be sent to the reference playback device, and then the playback progress information returned by the reference playback device according to the playback progress acquisition request may be received; the current playback progress information may also be actively sent by the reference playback device. At this time, the multimedia The synchronous playback device can receive the playback progress information.

Wherein, the playing progress information may include: refer to the current starting playing time information of the playing device (such as the playing time stamp of the media data packet), the identifier of the currently playing media data packet, and the like.

104. Determine, from the buffered media data packets according to the playing progress information, a target media data packet that needs to be played currently, and play the target media data packet.

Specifically, when the playback progress information includes: the identifier of the media data packet currently played (being played or about to be played) by the reference playback device, the step "determine the media data packet that needs to be played currently according to the playback progress information from the cached media data packet" The target media packet" can include:

Determine the media data packet corresponding to the identifier from the buffered media data packets, and use the media data packet corresponding to the identifier as the target media data packet to be played currently.

For example, when the system clock of the reference device is 1 minute, the reference playback device will play media packet 6 at this time, and the system clock of the playback device is 1 minute 1s, and the playback device will play media packet 7 at this time; the playback device detects two The time error between two system clocks is 1s greater than the preset threshold of 10ms. Then, the playback device obtains the number of the media data packet currently played by the reference playback device, which is 6. At this time, the playback device can re-determine the number to be played according to the number. The target media data packet is media data packet 6 (originally, media data packet 7 needs to be played, but now media data packet 6 is changed), that is, it jumps back to play media data packet 6; in this way, the playback device and the reference device can realize synchronous playback.

For another example, when the system clock of the reference device is 1 minute 2s, the reference playback device will play media packet 8 at this time, and the system clock of the playback device is 1 minute 1s, and the playback device will play media packet 7 at this time; the playback device detects When the time error between the two system clocks is 1s greater than the preset threshold of 10ms, the playback device obtains the number of the media data packet currently played by the reference playback device, which is 8. At this time, the playback device can re-determine the need based on the number The target media data packet to play is media data packet 8 (originally, media data packet 7 needs to be played, but now media data packet 8 is changed), that is, media data packet 7 is skipped and media data packet 8 is directly played; thus, the playback device and the reference device Can achieve synchronous playback.

Specifically, when the playback progress information includes: the initial playback time information (playback timestamp) of the media data packet currently played (being played or to be played) by the reference playback device; In the media data packet, determine the current target media data packet that needs to be played" may include:

Determine the media data packet corresponding to the initial playing time information from the buffered media data packets, and use the media data packet corresponding to the initial playing time information as the current target media data packet to be played.

In this embodiment, each media data packet includes the initial playback time information of the media data packet, such as a timestamp, therefore, the buffered media data can be retrieved according to the initial playback time information of the media data packet currently played by the reference playback device. Find the corresponding data package in the package and play it.

For example, the playback device is currently playing media data packet 4, and the timestamp of the media data packet 5 currently played by the reference playback device is 0:06. When the playback device detects that it is out of sync with the system clock of the reference playback device, it will obtain the timestamp 0 :06, then, search the media data packet corresponding to the time stamp 0:06 in the media data packet of the cache, at this moment, it can be found that the media data packet corresponding to the time stamp 0:06 is media data packet 5; , you can skip media data packet 4 and play media data packet 5.

Optionally, when it is detected that the system clock is synchronized with the system clock of the reference playback device, the buffered media data packets can be played normally, and the count value can be cleared. Afterwards, the buffered media data may continue to be counted from zero to obtain the number of currently buffered media data packets, and steps 102-104 are executed cyclically.

Optionally, the execution of step 102 may be returned after playing the target media data packet, so as to ensure that the subsequent media playing can always be synchronized with the storage of the parameter playing device.

As can be seen from the above, the embodiment of the present invention adopts the media data packet of playing cache, then, detects whether the system clock is synchronized with the system clock of the reference playback device, if not, then obtains the current playback progress information of the reference playback device, and according to the playback progress The information determines the current target media data package to be played from the cached media data package, and plays the target media data package. This solution can play the media data packet according to the current playback progress information of the reference device when it is not synchronized with the system clock of the reference playback device, so as to realize synchronous playback of multimedia data with the reference playback device. Therefore, compared with the prior art, it can Improve the synchronization of multimedia playback between multimedia playback devices.

In addition, in the embodiment of the present invention, a reference playback device can also be selected among the playback devices, so that the playback between the playback device and the reference playback device is synchronized, that is, synchronous coordination between the playback devices can reduce the load on the control device; and the present invention The playback device in the embodiment can always be in the playback state, and the playback output is normal, which reduces the impact on the playback output module or subsequent equipment.

Embodiment two

According to the multimedia synchronous playing method described in the first embodiment, an example will be given below for further detailed description.

In this embodiment, a detailed description will be made by taking the integrated multimedia synchronous playing device described in the first embodiment in the slave device as an example.

Referring to FIG. 2 , this embodiment provides a multimedia synchronous playback system, including: a source device 10, a master device 20, and at least one slave device 30; the source device 10, the master device 20, and the slave device 30 can be connected through Networks are interconnected.

Wherein, the main control device 20 is used to control the slave device, which can be a terminal, such as a mobile phone, a tablet computer, etc., and the main control device can also be a playback device, such as a playback device such as a speaker; this embodiment will use the main control device 20 The terminal is used as an example for description.

The slave device 30 may be a playback device controlled by the master device 20, and the slave device may be a playback device such as a sound box or a terminal with a playback function.

Wherein, the source device 10 is used to provide multimedia data to be played, which may be a network device such as a server.

The following will introduce the multimedia synchronous playing method provided by the present invention based on the above system.

Before playing multimedia synchronously, this embodiment can select a device from multiple slave devices 30 as a reference device for synchronous playback. During the process of synchronous playback, the clocks of all slave devices will be synchronized with the system clock of the reference device. For example, the master control device 20 may select a slave device from multiple slave devices 30 as a reference device for synchronous playback, and then send the identifier of the reference device to each slave device.

It should be noted that: when the master device 20 also receives and plays the media data distributed by itself in addition to distributing media data, the master device 20 is also a slave device. At this time, the main control device 20 may be selected as the reference broadcast device.

As shown in Figure 3, the multimedia synchronous playback method, the specific process can be as follows:

301. The source device 10 sends multimedia data to the master control device 20.

For example, the source device 10 receives the data acquisition request sent by the master device, and then sends corresponding multimedia data to the master device 20 according to the data acquisition request.

Wherein, the multimedia data may be audio data, audio and video data, and so on. The audio data includes but not limited to CD, WAV, MP3 (Moving Picture Experts Group Audio Layer III), WMA (Windows Media Audio) and other formats.

In other implementation manners, the main control device 20 may acquire multimedia data from local storage.

302. The main control device 20 packs the multimedia data to obtain multiple media data packets.

The master control device 20 may pack the media data according to a certain unit (with data size, media frame, etc. as the unit), so as to obtain multiple media data packets. For example, the media data may be packaged into multiple media data packets with equal data size, or media data packets with equal playing duration. For example, the audio data may be packed into multiple data packets with an audio length of 200ms.

Wherein, the media data packet may include: the data packet identifier, the starting playing time information (such as time stamp) of the data packet, and the media data segment.

303. The master control device 20 sends a media data packet to each slave device 30.

The master control device 20 may send media data packets to each slave device 30 according to the identifier of the media data packet; for example, send the media data packets to the slave devices 30 sequentially according to the numbers of the data packets.

304. The slave device 30 buffers and counts the media data packets.

305. The slave device 30 judges whether the current count value is greater than a preset threshold, if yes, execute step 306, and if not, return to execute step 305.

The preset threshold can be set according to actual needs, for example, it can be 7, 8, 9 and so on.

306. The slave device 30 detects a time error between its own system clock and the system clock of the reference device.

For example, the slave device 30 can request the system clock of the reference device (also referred to as a reference clock) from the master device 20, and then the slave device 30 divides its own system clock with the reference clock to obtain the difference between the two clocks. Time error, that is, time error.

307. The slave device 30 judges whether the time error is smaller than a preset error, if not, execute step 308, and if yes, execute step 310.

For example, if the time error is 2 ms, if the preset error is 1 ms, it can be judged that the time error is greater than the preset difference. At this time, the clock error is relatively large, and clock synchronization needs to be performed, so step 308 is executed.

For another example, if the time error is 0.5ms, if the preset error is 1ms, it can be judged that the time error is smaller than the preset difference. At this time, the clock error is small, and clock synchronization can not be performed. Therefore, it can be transferred to the execution Step 310 clears the count and waits for the next synchronization detection.

308. The slave device 30 obtains the current playback progress information of the reference device, and determines the target media data packet currently to be played in the buffered media data packets according to the playback progress information.

Wherein, the playing progress information may include: refer to the current starting playing time information of the playing device (such as the playing time stamp of the media data packet), the identifier of the currently playing media data packet, and the like.

For example, the playback progress information includes: the identifier of the media data packet currently played (being played or about to be played) by the reference playback device; at this time, the slave device 30 can determine the media data corresponding to the identifier from the buffered media data packet packet, and use the media data packet corresponding to the identifier as the current target media data packet to be played.

For example, the system clock of the reference device is 1:05, at this time, according to the start time information of the media data packet at 1:05, the reference device will play the media data packet 10, and the system clock of the slave device is 1 minute, at this time, according to The playback device will play media data packet 9; the slave device detects that the time error between the two system clocks is 5s greater than the preset threshold of 20ms, then the slave device obtains the number of the media data packet currently played by the reference device, which is 10, this , the slave device can re-determine the target media data packet to be played as media data packet 10 according to the number (originally, media data packet 9 needs to be played, but now media data packet 10 should be played instead), that is, it will jump back to play media data packet 10 ; so that the slave device and the reference device can achieve synchronous playback.

Specifically, when the playback progress information includes: the starting playback time information (playing time stamp) of the media data packet currently played (being played or to be played) by the reference playback device; The media data packet corresponding to the initial playing time information is determined in the packet, and the media data packet corresponding to the initial playing time information is used as the current target media data packet to be played.

For example, the slave device currently plays media data packet 7, and the timestamp of the media data packet 8 currently played by the reference playback device is 0:09. When the slave device detects that it is not synchronized with the system clock of the reference device, it obtains the timestamp 0:0: 09, then, look for the media packet corresponding to the timestamp 0:09 in the cached media packet, and now it can be found that the media packet corresponding to the timestamp 0:09 is media packet 8; at this time , you can skip media data packet 7 and play media data packet 8.

309. The slave device 30 plays the target media data packet, and returns to step 306.

For example, the slave device 30 originally needs to play the media data package 8, at this time, it may skip to play the media data package 9 or the media data package 7 currently played by the reference device.

310. The slave device 30 clears the current count, and returns to step 304.

During specific implementation, the present invention is not limited by the execution order of the described steps, and some steps may be performed in other orders or simultaneously if no conflict arises.

As can be seen from the above, the embodiment of the present invention uses the slave device 30 to play the buffered media data packets, and then the slave device 30 detects whether the system clock is synchronized with the system clock of the reference device, and if not, then obtains the current playback progress information of the reference device, From the buffered media data packets according to the playing progress information, determine the target media data packet currently to be played, and play the target media data packet. This solution can play the media data packet according to the current playback progress information of the reference device when it is not synchronized with the system clock of the reference playback device, so as to realize synchronous playback of multimedia data with the reference playback device. Therefore, compared with the prior art, it can Improve the synchronization of multimedia playback between multimedia playback devices.

In addition, in the embodiment of the present invention, a reference device can also be selected in the playback device, so that the playback between the playback device and the reference playback device is synchronized, that is, synchronous coordination between the playback devices can reduce the load on the master device; and the present invention The playback device in the embodiment can be in the playback state all the time, and the playback output is normal, which reduces the impact on the playback output module or subsequent equipment.

Embodiment three

In order to better implement the above method, an embodiment of the present invention also provides a multimedia synchronous playback device, which can be integrated into a playback device, and the playback device can be a smart phone, a tablet computer, a speaker, and the like.

As shown in Figure 4, the multimedia synchronous playback device 400 may include: a playback unit 401, a detection unit 402, an acquisition unit 403 and a synchronization unit 404, as follows:

A playback unit 401, configured to play the buffered media packets;

A detection unit 402, configured to detect whether the system clock is synchronized with the system clock of the reference playback device;

The obtaining unit 403 is used to obtain the current playback progress information of the reference playback device when the detection unit 402 detects that the system clock is not synchronized with the system clock of the reference playback device;

The synchronizing unit 404 is configured to determine a target media data packet currently to be played from the buffered media data packets according to the playing progress information, and play the target media data packet.

Wherein, referring to FIG. 5, the detection unit 402 may include: an error acquisition subunit 4021 and an error judgment subunit 4022;

The error acquisition subunit 4021 is used to acquire the time error between the system clock and the system clock of the reference playback device;

The error judging subunit 4022 is used to judge whether the time error is greater than a preset threshold;

If it is greater than the preset threshold, it is determined that the system clock is not synchronized with the system clock of the reference playback device;

If not greater than the preset threshold, it is determined that the system clock is synchronized with the system clock of the reference playback device.

Wherein, the playback progress information includes: the identification of the media data packet currently played by the reference playback device; at this time, the synchronization unit 404 can be specifically used to determine the media data packet corresponding to the identification from the buffered media data packets, and The media data packet corresponding to the identifier is used as the target media data packet to be played currently.

Optionally, referring to FIG. 6, the multimedia synchronous playback device 400 in this embodiment may also include:

Quantity acquisition unit 405, used to acquire the quantity of the media data packet of current cache before detection unit detects whether the system clock of the system clock is synchronized with the system clock of the reference playback device;

A quantity judging unit 406, configured to judge whether the quantity is greater than a preset quantity;

At this time, the detection unit 402 is configured to perform the step of detecting whether the system clock is synchronized with the system clock of the reference playback device when the quantity judging unit 406 determines that the quantity is greater than the preset quantity.

Wherein, the quantity obtaining unit 405 of this embodiment may be specifically configured to: count the currently cached media data packets to obtain a count value; obtain the number of currently cached media data packets according to the count value.

Optionally, referring to FIG. 7 , the multimedia synchronous playback device 400 of this embodiment may further include: a counting processing unit 407; the counting processing unit 407 is configured to, when the detection unit detects that the system clock is synchronized with the system clock of the reference playback device, set The count value is cleared to zero.

During specific implementation, each of the above units may be implemented as an independent entity, or may be combined arbitrarily as the same or several entities. The specific implementation of each of the above units may refer to the previous method embodiments, and will not be repeated here.

As can be seen from the above, the embodiment of the present invention adopts the playback unit 401 to play the cached media data packets, and then, the detection unit 402 detects whether the system clock is synchronized with the system clock of the reference playback device, and if not, the acquisition unit 403 acquires the reference playback. Based on the current playing progress information of the device, the synchronization unit 404 determines the target media data package that needs to be played currently from the buffered media data packages according to the playing progress information, and plays the target media data package. This solution can play the media data packet according to the current playback progress information of the reference device when it is not synchronized with the system clock of the reference playback device, so as to realize synchronous playback of multimedia data with the reference playback device. Therefore, compared with the prior art, it can Improve the synchronization of multimedia playback between multimedia playback devices.

In addition, the embodiment of the present invention can also select a reference playback device among the playback devices, so that playback synchronization between the playback device and the reference playback device, that is, synchronous coordination between playback devices can reduce the load on the control device; and the present invention The playback device in the embodiment can be in the playback state all the time, and the playback output is normal, which reduces the impact on the playback output module or subsequent equipment.

Embodiment four

The embodiment of the present invention also provides a terminal. As shown in FIG. A unit 504 , a sensor 505 , an audio circuit 506 , a wireless fidelity (WiFi, Wireless Fidelity) module 507 , a processor 508 including one or more processing cores, and a power supply 509 and other components. Those skilled in the art can understand that the terminal structure shown in FIG. 8 does not constitute a limitation on the terminal, and may include more or less components than those shown in the figure, or combine some components, or arrange different components.

The radio frequency circuit 501 can be used to send and receive information, or to receive and send signals during a call. In particular, after receiving the downlink information of the base station, it is processed by one or more processors 508; in addition, the data related to the uplink is sent to the base station . Generally, the radio frequency circuit 501 includes but is not limited to an antenna, at least one amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM, Subscriber Identity Module) card, a transceiver, a coupler, a low noise amplifier (LNA, Low Noise Amplifier), duplexer, etc. In addition, the radio frequency circuit 501 can also communicate with the network and other devices through wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to Global System for Mobile Communications (GSM, Global System of Mobile communication), General Packet Radio Service (GPRS, General Packet Radio Service), Code Division Multiple Access (CDMA, Code Division Multiple Access), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), Long Term Evolution (LTE, Long Term Evolution), email, Short Message Service (SMS, Short Messaging Service), etc.

Memory 502 may be used to store applications and data. The application programs stored in the memory 502 include executable program codes. Applications can be composed of various functional modules. The processor 508 executes various functional applications and data processing by running the application programs stored in the memory 502 . The memory 502 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application program required by a function (such as a sound playback function, an image playback function, etc.); Data created by the use of the terminal (such as audio data, phonebook, etc.) and the like. In addition, the memory 502 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices. Correspondingly, the memory 502 may further include a memory controller to provide access to the memory 502 by the processor 508 and the input unit 503 .

The input unit 503 can be used to receive input numbers, character information or user characteristic information (such as fingerprints), and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control. Specifically, the input unit 503 may include a fingerprint identification module. In some embodiments, the input unit 503 may also include a touch-sensitive surface. A touch-sensitive surface, also known as a touch display or trackpad, collects user touch operations on or near it (for example, the user uses a finger, stylus, etc. any suitable object or accessory on the touch-sensitive surface or on the touch-sensitive Operation near the surface), and drive the corresponding connection device according to the preset program. Optionally, the touch-sensitive surface may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and sends it to the to the processor 508, and can receive and execute commands sent by the processor 508. In addition, touch-sensitive surfaces can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to touch-sensitive surfaces, the input unit 503 may also include other input devices. Specifically, other input devices may include, but are not limited to, one or more of physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, joysticks, and the like.

The display unit 504 can be used to display information input by or provided to the user and various graphical user interfaces of the terminal. These graphical user interfaces can be composed of graphics, text, icons, videos and any combination thereof. The display unit 504 may include a display panel. Optionally, the display panel may be configured in the form of a liquid crystal display (LCD, Liquid Crystal Display), an organic light-emitting diode (OLED, Organic Light-Emitting Diode), or the like. Further, the touch-sensitive surface can cover the display panel. When the touch-sensitive surface detects a touch operation on or near it, it is sent to the processor 508 to determine the type of the touch event, and then the processor 508 displays on the display according to the type of the touch event. The corresponding visual output is provided on the panel. Although in FIG. 8, the touch-sensitive surface and the display panel are used as two independent components to realize the input and input functions, in some embodiments, the touch-sensitive surface and the display panel can be integrated to realize the input and output functions.

The terminal may also include at least one sensor 505, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel according to the brightness of the ambient light, and the proximity sensor may turn off the display panel and/or the backlight when the terminal moves to the ear . As a kind of motion sensor, the gravitational acceleration sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when it is stationary, and can be used for applications that recognize the attitude of mobile phones (such as horizontal and vertical screen switching, related Games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tap), etc.; as for other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, etc. repeat.

The audio circuit 506 can provide an audio interface between the user and the terminal through a speaker or a microphone. The audio circuit 506 can convert the received audio data into an electrical signal, transmit it to the speaker, and the speaker converts it into a sound signal output; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is converted into The audio data, after being processed by the audio data output processor 508, is sent to another terminal through the radio frequency circuit 501, or the audio data is output to the memory 502 for further processing. The audio circuit 506 may also include an earplug jack to provide communication between an external earphone and the terminal.

Wireless Fidelity (WiFi) is a short-distance wireless transmission technology. The terminal can help users send and receive emails, browse web pages, and access streaming media through the WiFi module 507. It provides users with wireless broadband Internet access. Although Fig. 8 shows the Wi-Fi module 507, it can be understood that it is not an essential component of the terminal, and can be completely omitted as required without changing the essence of the invention.

The processor 508 is the control center of the terminal. It uses various interfaces and lines to connect various parts of the entire terminal. By running or executing the application programs stored in the memory 502 and calling the data stored in the memory 502, various functions of the terminal are executed. function and process data, so as to monitor the terminal as a whole. Optionally, the processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface and application programs, etc. , the modem processor mainly handles wireless communications. It can be understood that the foregoing modem processor may not be integrated into the processor 508 .

The terminal also includes a power source 509 (such as a battery) for powering various components. Preferably, the power supply can be logically connected to the processor 508 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. The power supply 509 may also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators and other arbitrary components.

Although not shown in FIG. 8 , the terminal may also include a camera, a Bluetooth module, etc., which will not be repeated here.

Specifically, in this embodiment, the processor 508 in the terminal loads the executable program code corresponding to the process of one or more application programs into the memory 502 according to the following instructions, and the processor 508 executes the executable program code stored in the The application program in memory 502, thereby realizes various functions:

Play the media data packet of cache, then, detect whether the system clock of system clock and the system clock of reference playback device are synchronous, if not, then obtain the current playback progress information of described reference playback device, according to the media data packet of buffering according to described playback progress information , determine the target media data packet currently to be played, and play the target media data packet.

Preferably, the detecting whether the system clock is synchronized with the system clock of the reference playback device includes:

Obtain the time error between the system clock and the system clock of the reference playback device;

judging whether the time error is greater than a preset threshold;

If it is greater than the preset threshold, it is determined that the system clock is not synchronized with the system clock of the reference playback device;

If not greater than the preset threshold, it is determined that the system clock is synchronized with the system clock of the reference playback device.

Preferably, the playback progress information includes: the identifier of the media data packet currently played by the reference playback device;

According to the playing progress information, from the cached media data packets, determining the current target media data packets that need to be played includes:

Determine the media data packet corresponding to the identifier from the cached media data packets, and use the media data packet corresponding to the identifier as the current target media data packet to be played.

Preferably, the processor 508 can also implement the following functions:

Before detecting whether the system clock of the system clock is synchronized with the system clock of the reference playback device, the quantity of the media data packets of the current buffer is obtained; whether the quantity is judged to be greater than the preset quantity, if so, whether the system clock of the detection system clock and the reference playback device is performed Synchronization steps.

Wherein, the number of currently cached media packets is obtained, including:

Count the currently cached media packets to obtain the count value;

Obtain the number of currently buffered media packets according to the count value;

At this point, the processor 508 can also implement the following functions:

When the system clock is synchronized with the system clock of the reference playback device, the count value is cleared to zero.

For details of the above operations, reference may be made to the foregoing method embodiments, and details are not repeated here.

It can be seen from the above that the embodiment of the present invention provides a terminal, the terminal uses the buffered media data packets to play, and then detects whether the system clock is synchronized with the system clock of the reference playback device, and if not, obtains the current clock of the reference playback device. According to the playback progress information, determine the target media data packet that needs to be played currently from the buffered media data packets according to the playback progress information, and play the target media data packet. This solution can play the media data packet according to the current playback progress information of the reference device when it is not synchronized with the system clock of the reference playback device, so as to realize synchronous playback of multimedia data with the reference playback device. Therefore, compared with the prior art, it can Improve the synchronization of multimedia playback between multimedia playback devices.

It should be noted that those skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. The medium may include: a read only memory (ROM, Read Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and the like.

Above, a method, device, system and terminal for synchronous broadcasting of multimedia provided by the embodiments of the present invention have been introduced in detail. In this paper, specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only It is used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, this specification The content should not be construed as a limitation of the invention.

Claims (9)

1. A kind of multimedia synchronous playing method is characterized in that, is applicable to the playing equipment in the multimedia synchronous playing system, comprises: receiving the media data packet sent by the control device, and buffering the media data packet; Play buffered media packets; Get the number of currently cached media packets; When the number is greater than the preset number, detect whether the system clock is synchronized with the system clock of the reference playback device, and the reference playback device is a reference playback device selected by the control device in the multimedia synchronous playback system from a plurality of playback devices; If not, then obtain the current playback progress information of the reference playback device, and the playback progress information includes: the identifier of the media data packet currently played by the reference playback device; Determining the media data packet corresponding to the identifier from the cached media data packets, and using the media data packet corresponding to the identifier as the target media data packet currently to be played; Skip and play the target media data packet. 2. The multimedia synchronous playing method as claimed in claim 1, wherein, whether said detection system clock is synchronous with the system clock of the reference playback device, comprises: Obtain the time error between the system clock and the system clock of the reference playback device; judging whether the time error is greater than a preset threshold; If it is greater than the preset threshold, it is determined that the system clock is not synchronized with the system clock of the reference playback device; If not greater than the preset threshold, it is determined that the system clock is synchronized with the system clock of the reference playback device. 3. multimedia synchronous playing method as claimed in claim 1, is characterized in that, the quantity of the media packet of described acquisition current cache, comprises: Count the currently cached media packets to obtain the count value; Obtain the number of currently buffered media packets according to the count value; The multimedia synchronous playing method also includes: When the system clock is synchronized with the system clock of the reference playback device, the count value is cleared to zero. 4. A multimedia synchronous playback device, characterized in that, is applicable to the playback equipment in the multimedia synchronous playback system, comprising: The playback unit is configured to receive the media data packet sent by the control device, buffer the media data packet, and play the buffered media data packet; A quantity acquisition unit, used to acquire the quantity of the currently cached media data packets before the detection unit detects whether the system clock is synchronized with the system clock of the reference playback device; A quantity judging unit, configured to judge whether the quantity is greater than a preset quantity; The detection unit is used to detect whether the system clock is synchronized with the system clock of a reference playback device when the number judgment unit judges that the number is greater than a preset number, and the reference playback device is a control device in the multimedia synchronous playback system from multiple The reference playback device selected in the playback device; An acquisition unit, configured to acquire current playback progress information of the reference playback device when the detection unit detects that the system clock is out of sync with the system clock of the reference playback device, the playback progress information including: the media currently played by the reference playback device the identification of the packet; A synchronization unit, configured to determine the media data packet corresponding to the identifier from the buffered media data packets, and use the media data packet corresponding to the identifier as the target media data packet that needs to be played currently; jump to play the target media packets. 5. The multimedia synchronous player as claimed in claim 4, wherein the detection unit comprises: an error acquisition subunit and an error judgment subunit; The error acquisition subunit is used to acquire the time error between the system clock and the system clock of the reference playback device; The error judging subunit is used to judge whether the time error is greater than a preset threshold; If it is greater than the preset threshold, it is determined that the system clock is not synchronized with the system clock of the reference playback device; If not greater than the preset threshold, it is determined that the system clock is synchronized with the system clock of the reference playback device. 6. The multimedia synchronous playing device as claimed in claim 5, further comprising: a counting processing unit; The quantity acquisition unit is specifically used to: count the currently cached media data packets to obtain a count value; obtain the quantity of the currently cached media data packets according to the count value; The count processing unit is configured to clear the count value to zero when the detection unit detects that the system clock is synchronized with the system clock of the reference playback device. 7. A terminal, characterized in that, comprising: a memory storing executable program code; a processor coupled to the memory; The processor invokes the executable program code stored in the memory to execute the method according to any one of claims 1 to 3. 8. A multimedia synchronous playback system, characterized in that it comprises: a control device and at least one playback device; the control device is connected to the playback device; and the playback device is used to perform any of claims 1 to 3 one of the methods described. 9. A computer-readable storage medium, which stores a computer program for multimedia synchronous playback, wherein the computer program causes a computer to execute the method according to claim 1.