WO2023207067A1 - Data sending apparatus, data receiving apparatus, data transmission method, and data transmission system - Google Patents

Abstract

Provided in the embodiments of the present application are a data sending apparatus, a data receiving apparatus, a data transmission method, and a data transmission system. The data sending apparatus is used for transmitting data to the data receiving apparatus by means of a data frame in a synchronization link, wherein the data carries a data clock, and the synchronization link is provided with a link clock. The data sending apparatus comprises a first controller and a first communication interface. The first controller is used for: controlling the first communication interface, and sending, within a preset time, data to the data receiving apparatus in the form of a data packet by means of the data frame; acquiring a count value of the link clock and a count value of the data clock within the preset time, and obtaining a clock count difference value according to a difference value between a count value variation of the link clock and a count value variation of the data clock within the preset time; and according to the clock count difference value, controlling the first communication interface to adjust the number of data packets which are transmitted by the data frame, and sending instruction information to the data receiving apparatus, wherein the instruction information is used for instructing the adjustment of the number of data packets which are transmitted on the data frame.

Description

Data sending device, receiving device, transmission method and transmission system

This application requires the priority of the Chinese patent application submitted to the State Intellectual Property Office on April 26, 2022, with the application number 202210451952.X, and the application name is "data sending device, receiving device, transmission method and transmission system", all of which The contents are incorporated into this application by reference.

Technical field

The present application relates to the technical field of data synchronous transmission, and in particular to a data sending device, receiving device, transmission method and transmission system.

Background technique

Synchronous transmission is to send data in real time through a synchronous link based on the same clock beat.

When using a synchronous link to synchronously transmit data carrying a data clock, a synchronous transmission deviation will occur because the data clock and the link clock of the synchronous link do not belong to the same clock domain. This synchronous transmission deviation will greatly reduce the real-time performance. The quality of synchronously transmitted data, and this synchronous transmission deviation will become larger and larger over time.

Contents of the invention

Embodiments of the present application provide a data sending device, a receiving device, a transmission method and a transmission system to solve the problem of synchronization transmission deviation between the data clock of the data and the link clock of the synchronization link during synchronous transmission.

In order to achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

In a first aspect, a data sending device is provided for transmitting data to a data receiving device through a data frame in a synchronization link; the data carries a data clock, and the synchronization link has a link clock; the data sending device includes: A controller and a first communication interface; the first controller is used to: control the first communication interface, send data in the form of data packets through data frames to the data receiving device within a preset time; obtain the link within the preset time The count value of the link clock and the count value of the data clock; calculate the clock count difference; the clock count difference is the difference between the count value change of the link clock and the count value change of the data clock within the preset time; according to The clock count difference controls the first communication interface to adjust the number of data packets transmitted in the data frame, and sends instruction information to the data receiving device. The instruction information is used to instruct the adjustment of the number of data packets transmitted in the data frame.

The above-mentioned data sending device provided by the embodiment of the present application obtains the count value of the data clock of the data and the count value of the link clock of the synchronization link, thereby calculating the clock count difference, and calculates the data clock through the clock count difference. and the link clock, and adjusts the number of data packets in a single data frame on the synchronization link according to the calculated deviation, and sends the indication information to the data receiving device. Through the above settings, the deviation between the data clock of the data in the synchronized wireless transmission and the link clock of the synchronized link is accurately measured, and the data packets are adjusted according to the measurement results, thereby avoiding the problem that the data receiving device is receiving data due to the deviation. Errors occur during the packetization process, ultimately affecting the quality of the data being transmitted.

In a possible implementation, the indication information includes adjustment direction information; the adjustment direction information indicates increasing the number of data packets transmitted in the data frame; or the adjustment direction information indicates reducing the number of data packets transmitted in the data frame. In this embodiment, the adjustment direction information is used to indicate to the data receiving device whether the number of data packets in the adjusted data frame is increased or decreased. The data receiving device correspondingly adjusts and analyzes the number of data packets transmitted in the data frame according to the adjustment direction information.

In a possible implementation, the indication information also includes adjustment quantity information; when the adjustment direction information indicates increasing the number of data packets transmitted in the data frame, the adjustment quantity information is the increased number of data packets transmitted in the data frame. Alternatively, when the adjustment direction information indicates reducing the number of data packets transmitted in the data frame, the adjustment quantity information is the reduced number of data packets transmitted in the data frame. After receiving the instruction information, the data receiving device can increase the number of parsed data packets or reduce the number of parsed data packets according to the preset number. In this embodiment, the data sending device may also include the actual number of adjusted data packets, that is, the adjustment quantity information, in the instruction information and send it to the data receiving device, and then the data receiving device adjusts the data according to the adjustment quantity information included in the received instruction information. The number of packets parsed.

In a possible implementation, the indication information also includes an adjustment time point; the adjustment time point is used to indicate a time point at which to increase or decrease the number of data packets on the data frame, and the adjustment time point includes absolute time A or relative time B; Absolute time A is the corresponding time point when the count value of the link clock is A; relative time B is the time point after time B has passed after the time point of the indication information. The data sending device sends the time of the adjusted data packet of the data frame to the data receiving device in the form of absolute time A or relative time B. The data receiving device can locate the adjusted data packet according to the absolute time A or relative time B. frames, and then adjust the number of parsed packets accordingly.

In a possible implementation, the data is audio data or video data.

In a possible implementation, the data sending device further includes a first player; the first controller is further configured to adjust the progress of playing audio data or video data on the first player according to the clock count difference. In this embodiment, the clock count difference is used to adjust the progress of playing audio data or video data on the first player to achieve synchronization of the playback progress on the first player of the data sending device and the playback progress on the data receiving device.

In a second aspect, a data receiving device is provided for receiving a data packet from a data sending device through a data frame in a synchronization link. The data packet carries data; the data carries a data clock, and the synchronization link has a link clock. ; The data receiving device includes: a second controller and a second communication interface; the second controller is used to: control the second communication interface, receive data packets through the data frame, and receive indication information, the indication information is used to instruct the adjustment of the data frame for transmission The number of data packets; adjust and parse the number of data packets received through the data frame according to the instruction information.

In a possible implementation, the indication information includes adjustment direction information; the adjustment direction information indicates increasing the number of data packets transmitted in the data frame. Alternatively, the adjustment direction information indicates reducing the number of data packets transmitted in the data frame. The second controller is configured to: if the received adjustment direction information indicates increasing the number of data packets transmitted in the data frame, increase the number of parsed data packets received through the data frame; if the received adjustment direction information indicates decreasing the number of data packets transmitted in the data frame The number of packets transmitted is reduced by the number of packets received via parsing the data frame.

In a possible implementation, the indication information also includes adjustment quantity information; the adjustment quantity information is an increase in the number of data packets transmitted in the data frame, or a decrease in the number of data packets transmitted in the data frame. The second controller is configured to: if the received adjustment direction information indicates increasing the number of data packets transmitted in the data frame, increase parsing of the data packets received through the data frame; increase the number of parsed data packets to the adjustment quantity information; if receiving The received adjustment direction information indicates that the number of data packets transmitted in the data frame is reduced, and the number of data packets received through the data frame is reduced; the number of parsed data packets is reduced to the adjustment quantity information.

In a possible implementation, the indication information also includes an adjustment time point; the adjustment time point is used to indicate a time point at which to increase or decrease the number of data packets on the data frame, and the adjustment time point includes absolute time A or relative time B; Absolute time A is the corresponding time point when the count value of the link clock is A; relative time B is the time point after time B has passed after the time point of the indication information. The second controller is used to: if the received adjustment direction information indicates increasing the number of data packets transmitted in the data frame, after the adjustment time point, increase the number of parsed data packets received through the data frame; if the received adjustment direction If the information indicates that the number of data packets transmitted in the data frame is reduced, then after the adjustment time point, the number of data packets received through the data frame is reduced.

In a possible implementation, the data is audio data or video data.

In the third aspect, a data transmission method is provided, which sends data in the form of data packets to the data receiving device through the data frame of the synchronization link within a preset time; the data carries a data clock, and the synchronization link has a link path clock; obtain the count value of the link clock and the count value of the data clock within the preset time; calculate the clock count difference; the clock count difference is the change in the count value of the link clock and the count value of the data clock within the preset time The difference between the changes; according to the clock count difference, control the first communication interface to adjust the number of data packets transmitted in the data frame, and send instruction information to the data receiving device, the instruction information is used to instruct the adjustment of the data transmitted in the data frame The number of packages.

In a possible implementation, the indication information includes adjustment direction information; the adjustment direction information is used to indicate increasing the number of data packets transmitted in the data frame. Alternatively, the adjustment direction information is used to indicate reducing the number of data packets transmitted in the data frame.

In a possible implementation, the indication information also includes adjustment quantity information; when the adjustment direction information indicates increasing the number of data packets transmitted in the data frame, the adjustment quantity information is the increased number of data packets transmitted in the data frame. Alternatively, when the adjustment direction information indicates reducing the number of data packets transmitted in the data frame, the adjustment quantity information is the reduced number of data packets transmitted in the data frame.

In a possible implementation, the indication information also includes an adjustment time point; the adjustment time point is used to indicate a time point at which to increase or decrease the number of data packets on the data frame, and the adjustment time point includes absolute time A or relative time B; Absolute time A is the corresponding time point when the count value of the link clock is A; relative time B is the time point after time B has passed after the time point of the indication information.

In a possible implementation, the data is audio data or video data.

In the fourth aspect, a data transmission method is provided, which receives data packets through the data frame of the synchronization link and receives indication information; the indication information is used to indicate adjusting the number of data packets transmitted on the data frame; the data packets carry data; The data carries the data clock, and the synchronization link has a link clock; the number of data packets received through the data frame is adjusted and parsed according to the instruction information.

In a possible implementation, the indication information includes adjustment direction information; the adjustment direction information indicates increasing the number of data packets transmitted in the data frame; or the adjustment direction information indicates reducing the number of data packets transmitted in the data frame. If the received adjustment direction information indicates to increase the number of data packets transmitted in the data frame, increase the number of data packets received through the data frame; if the received adjustment direction information indicates to decrease the number of data packets transmitted in the data frame , then reduce the number of packets received through the data frame parsed.

In a possible implementation, the indication information also includes adjustment quantity information; the adjustment quantity information is an increase in the number of data packets transmitted in the data frame, or a decrease in the number of data packets transmitted in the data frame. If the received adjustment direction information indicates that the number of data packets transmitted in the data frame is increased, the number of data packets received through the data frame is increased; the number of data packets that are parsed is increased by the number of the adjustment quantity information. If the received adjustment direction information indicates to reduce the number of data packets transmitted in the data frame, the number of data packets received through the data frame is reduced; the number of parsed data packets is reduced to the adjustment quantity information.

In a possible implementation, the indication information also includes an adjustment time point; the adjustment time point is used to indicate a time point at which to increase or decrease the number of data packets on the data frame, and the adjustment time point includes absolute time A or relative time B; Absolute time A is the corresponding point in time when the count value of the link clock is A; relative time B is the point in time that elapses after time B after the point in time indicating the information; if the received adjustment direction information indicates increasing the value transmitted in the data frame The number of data packets, then after the adjustment time point, increase the number of data packets received through the analysis of the data frame; if the received adjustment direction information indicates to reduce the number of data packets transmitted in the data frame, then after the adjustment time point, Reduce the number of packets received via data frames parsed.

In a fifth aspect, a communication device is provided. The communication device includes a transceiver module. The transceiver module is used to send data in the form of data packets to the data receiving device through the data frame of the synchronous link within a preset time; data The data clock is carried in the synchronization link, and the synchronization link has a link clock; the number of data packets transmitted on the data frame is adjusted, and indication information is sent to the data receiving device, and the indication information is used to instruct the adjustment of the number of data packets transmitted on the data frame.

In a sixth aspect, a communication device is provided. The communication device includes a transceiver module. The transceiver module is used to receive data packets through the data frame of the synchronization link and receive indication information; the indication information is used to instruct the adjustment of the data transmitted on the data frame. The number of packets; the data packets carry data; the data carries the data clock, and the synchronization link has a link clock; adjust and parse the number of data packets received through the data frame according to the instruction information.

A seventh aspect provides a data transmission system, including the data sending device of the first aspect and the data receiving device of the second level; the data sending device is used to transmit data in the form of data packets through a synchronous link The data frame is sent to the data receiving device, and indication information is also sent to the data receiving device through the synchronization link; the data carries the data clock, and the indication information is used to indicate adjusting the number of data packets transmitted on the data frame; the data receiving device is used to Receive data packets and indication information from the synchronization link, parse the data packets to obtain data, and adjust and parse the number of data packets received through the data frame according to the indication information.

An eighth aspect provides a chip system. The chip system includes at least one processor and at least one interface circuit. At least one processor and at least one interface circuit may be interconnected by wires. The processor is used to support the electronic device to implement various functions or steps in the above method embodiments. At least one interface circuit can be used to receive signals from other devices (such as memory) or send signals to other devices (such as communication interfaces). The chip system may include chips and may also include other discrete devices.

In a ninth aspect, a computer-readable storage medium is provided. The computer-readable storage medium includes instructions. When the instructions are run on the above-mentioned chip system, the chip system causes the chip system to perform various functions or steps in the above-mentioned method embodiments, such as executing The method described in the third or fourth aspect above.

In a tenth aspect, a computer program product including instructions is provided. When the instructions are run on the above-mentioned chip system, the chip system causes the chip system to perform various functions or steps in the above-mentioned method embodiments, such as executing the above-mentioned third or fourth aspect. method of recording.

Regarding the technical effects of the second to tenth aspects, refer to the previous description of the technical effects of the first aspect.

Description of the drawings

Figure 1 is a schematic structural diagram of a data frame on a synchronization link provided by an embodiment of the present application;

Figure 2 is a schematic structural diagram of a data transmission system provided by an embodiment of the present application;

Figure 3 is a schematic structural diagram of a data sending device provided by an embodiment of the present application;

Figure 4 is a cumulative schematic diagram of clock errors provided by an embodiment of the present application;

Figure 5 is an example diagram of adjusting the number of data packets in a data frame provided by an embodiment of the present application;

Figure 6 is another example diagram of adjusting the number of data packets in a data frame provided by the embodiment of the present application;

Figure 7 is an example diagram for determining absolute time A provided by the embodiment of the present application;

Figure 8 is an example diagram for determining relative time B provided by the embodiment of the present application;

Figure 9A is an example diagram of multiple data frames without adjusting the number of data packets provided by the embodiment of the present application;

Figure 9B is an example diagram of adding one data packet to multiple data frames according to the embodiment of the present application;

Figure 9C is an example diagram of adding multiple data packets to multiple data frames provided by the embodiment of the present application;

Figure 10 is a schematic flow chart of a data transmission method provided by an embodiment of the present application;

Figure 11 is a schematic flow chart of another data transmission method provided by an embodiment of the present application;

Figure 12 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 13 is a schematic structural diagram of a chip system provided by an embodiment of the present application.

Detailed ways

It should be noted that the terms "first", "second", etc. involved in the embodiments of this application are only used for the purpose of distinguishing features of the same type and cannot be understood as indicating relative importance, quantity, order, etc.

The terms “exemplary” or “for example” used in the embodiments of this application are used to represent examples, illustrations or descriptions. Any embodiment or design described herein as "exemplary" or "such as" is not intended to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the words "exemplary" or "such as" is intended to present the concept in a concrete manner.

The terms "coupling" and "connection" involved in the embodiments of this application should be understood in a broad sense. For example, they may refer to a physical direct connection, or they may refer to an indirect connection realized through electronic devices, such as resistance, inductance, capacitance or other electronic devices. The connection implemented by the device.

First, some concepts involved in this application are described:

In multimedia systems, signal lines are often used to transmit data. This transmission method has higher requirements for site wiring and also has greater restrictions on transmission. With the development of transmission technology, wireless real-time transmission technology has been widely used due to its simple equipment deployment and convenient transmission.

Wireless real-time network transmission is one of the key technologies for wireless digital communications. In its application, it includes a sending end and a receiving end. The sending end transmits data synchronously to the receiving end in real time through the transmission link.

In some application scenarios that require high quality of transmitted data, the data is usually not compressed during data transmission. At this time, the data stream when transmitting data can be regarded as a fixed code rate service, or Called isochronous business. When wirelessly transmitting this kind of data in real time, it is often necessary to ensure a low transmission delay.

From the analysis of the physical layer characteristics of the transmission link of wireless real-time network transmission, the transmission link carrying data can be divided into two types: competition-based links and non-competition-based links.

In contention-based links, such as Wireless Fidelity (Wi-Fi), all senders need to detect the idle state of the transmission link. The sender can only send signals when the transmission link is idle. When the data transmission system uses competing links, if there are many senders, there may be a large number of senders competing for channel access, resulting in uncontrollable time for each sender to occupy the transmission link. Therefore, a wireless real-time network using competing links cannot guarantee the low transmission delay requirement of the sender during the wireless real-time transmission of data.

Therefore, when there is a high requirement for transmission delay, as shown in FIG. 1 , the transmission link is often a synchronous link 200 that is a non-contention link. For example, a synchronous transmission network based on a central control system. Common synchronous transmission networks include cellular wireless communication networks, etc. In a synchronous transmission network, the clocks of the sending end and the receiving end are unified. During the transmission process, time synchronization and frequency synchronization on the synchronization link are achieved through symbol correlation technology. Symbol related technology mainly refers to symbol synchronization. In wireless digital communication, in order to recover the signal received in the synchronization link 200 into data, the receiving end must periodically sample and determine the received signal. Therefore, a clock signal synchronized in symbol rate with the signal received from the synchronization link 200 needs to be set at the receiving end to obtain accurate sampling. The synchronous transmission network based on the central control system will reserve periodic and equally spaced link resources on the synchronous link 200 to carry data of a specific length, which is very conducive to data transmission. This equally spaced link resource is the data frame 210. The data is transmitted in the form of data packets 214 through data frames 210 of the synchronization link 200 .

Data transmitted by a synchronous transmission network using non-competition links can be divided into data carrying a data clock and data without a data clock according to whether it carries a data clock. For data that does not carry a data clock, the playback rate can be specified by the playback device or the transmission device, so the synchronization link 200 of the synchronous transmission network can be directly used for transmission according to the link clock. Common data that does not carry a data clock include audio or video streams from either the network or the file system. As shown in Figure 4, for data carrying a data clock, when the synchronous link 200 is used for transmission, there is often a synchronous transmission deviation accumulated over a long period of time because the data clock and the link clock are not synchronized. Further, due to the synchronous transmission deviation Resulting in the loss of data samples during transmission. For example, with a relative deviation of 20 ppm between the data clock and the link clock, a data with a sampling rate of 48KHz will produce a deviation of 20 microseconds per second, which is approximately equal to one sampling period. In this case, the sender will accumulate one data packet 214 that is not sent to the receiving end every second, or will accumulate one data packet 214 that is not sent to the receiving end every second, which ultimately results in the quality of the transmitted data being compromised.

One solution is to resample the data carrying the data clock during transmission, and then convert the resampled data into data packets 214 for transmission through the synchronization link 200 . Resampling methods include converting data from digital signals to analog signals and then resampling; or using simple interpolation to resample the data. However, both resampling methods will cause the sampling accuracy of the data to be damaged, thereby reducing the quality of the transmitted data. In addition, the resampling process will also consume a certain amount of additional computing resources from the device.

Another solution is to sample the data during the transmission process, periodically discard a certain amount of data or leave a certain number of gaps in the data frame 210, and then send the data through the data frame 210 of the synchronization link 200. Transmitted from the sender to the receiver. This method is simple and easy to implement, but it will also cause the quality of the data to be compromised.

Another solution is to adjust the data clock and link clock during the transmission process so that the data transmission rate and data consumption rate are always synchronized. Although this method can ensure the quality of transmitted data, the stability of the link clock is often greater than the data clock. It is very difficult to adjust the link clock to achieve clock synchronization. At the same time, due to changes in the link clock, the Will introduce more other problems.

To this end, the embodiment of the present application additionally proposes a data transmission system, as shown in FIG. 2 , including a data sending device 100 and a data receiving device 300 . The data sending device 100 is configured to carry the data in the form of a data packet 214 on the data frame 210 of the synchronization link 200 with a link clock, and send it to the data receiving device 300; the data carries the data clock. The data sending device 100 is also used to detect the deviation between the data clock and the link clock, adjust the number of data packets 214 in the data frame 210 according to the deviation, and send instruction information to the data receiving device 300. The instruction information is used to instruct the adjustment of the data packets 214 on the data frame. Number of packets 214 transmitted. The data receiving device 300 is configured to receive the data packet 214 from the data sending device 100 through the data frame 210 in the synchronization link 200; and adjust and parse the number of data packets 214 received from the data frame 210 according to the received instruction information.

The data sending device 100 includes a first controller 110 and a first communication interface 120 . The first controller 110 is used to: control the first communication interface 120 to carry the data in the form of a data packet 214 on the data frame 210 and send it to the data receiving device 300 within a preset time; control the first communication interface 120 to adjust the The number of data packets 214 transmitted on the current data frame 210 is sent to the data receiving device 300 at the same time.

Through the above operations, it is possible to achieve simple and easy-to-operate synchronous transmission of data carrying the data clock when the data clock and the link clock deviate. At the same time, this transmission ensures the quality of the transmitted data.

The following data transmission method as shown in Figure 10 can be implemented through the data transmission system shown in Figure 2, including steps S110-S140:

S110. The data sending device 100 receives sampled data; the data carries a data clock.

S120. The data sending device 100 transmits data to the data receiving device 300 through the synchronization link 200.

In some embodiments, as shown in FIG. 2 , the first controller 110 controls the first communication interface 120 to carry data in the form of a data packet 214 on a data frame 210 and send it to the data receiving device 300 within a preset time. ; Obtain the count value of the link clock and the calculated value of the data clock within the preset time, calculate the difference between the count value change of the link clock and the count value change of the data clock, and obtain the clock count difference; according to the clock The count difference controls the first communication interface 120 to adjust the number of data packets 214 transmitted on the current data frame 210 and at the same time send indication information to the data receiving device 300 .

Specifically, as shown in Figure 11, step S120 includes steps S121-S124:

S121. The first controller 110 of the data sending device 100 converts the received data into a data packet 214, and sends transmission signaling to the data receiving device 300. The transmission signaling is used to instruct the data receiving device 300 to receive the synchronization link 200. Data transmitted in data frame 210.

For example, after receiving the sampled data, the data sending device 100 first sends transmission signaling to the data receiving device 300 . The transmission signaling includes the following parameter information of the transmission data: start time domain, end time domain, start frequency domain, end frequency domain, transmission power; after receiving the transmission signaling, the data receiving device 300 receives the transmission signaling according to the information included in the transmission signaling. The parameter information is ready for receiving data for synchronous transmission.

By sending the transmission signaling in advance, it is ensured that the data sending device 100 and the data receiving device 300 perform synchronous and real-time transmission through the synchronization link 200 .

Exemplarily, the method by which the data sending device 100 converts data into data packets 214 includes modulation or encoding. When it is modulated, the transmission signaling sent by the data sending device 100 to the data receiving device 300 also includes modulation parameters, so that the data receiving device 300 demodulates the data packet 214 according to the received modulation parameters to obtain data. When encoding, the transmission signaling sent by the data sending device 100 to the data receiving device 300 also includes encoding parameters, so that the data receiving device 300 decodes the data packet 214 according to the received encoding parameters to obtain data.

S122. The first controller 110 of the data sending device 100 controls the first communication interface 120 to send the data packet 214 to the data receiving device 300 through the data frame 210 in the synchronization link 200 within a preset time.

S123. The first controller 110 obtains the count value of the link clock and the count value of the data clock of the synchronization link 200, and based on the difference between the change amount of the count value of the link clock and the change amount of the count value of the data clock within the preset time Difference, get the clock count difference. The first controller 110 controls the first communication interface 120 to adjust the number of data packets 214 transmitted by the data frame 210 according to the clock count difference, and sends instruction information to the data receiving device 300 .

Exemplarily, after starting to transmit data, the data sending device 100 counts the link clock and the data clock respectively through counters, where the count value of the data clock represents the amount of data received when the data receiving device 300 receives the sampled data. , the count value of the link clock represents the amount of transmission of the data packet 214 on the synchronous link 200. The data sending device 100 obtains the clock count difference by calculating the difference between the change amount of the count value of the link clock and the change amount of the count value of the data clock within a preset time. The resulting clock count difference reflects the skew of the link clock and data clock. When the clock count difference reaches a certain value, the deviation between the two has reached the time required to generate a data packet 214. At this time, it will appear that the first controller 110 has converted one more data packet 214 and has not sent it to the data receiver. The device 300, or at least one data packet 214, is converted to the data receiving device 300. The skew here can be either the data clock being slower than the link clock or the data clock being faster than the link clock. When the data clock is slower than the link clock, the data consumption rate is lower than the data transmission rate. As time accumulates, the deviation gradually increases, and the first controller 110 converts more than one data packet 214 less; when the data clock When it is faster than the link clock, the data consumption rate is higher than the data transmission rate, the deviation gradually increases, and the first controller 110 converts more than one data packet 214.

The data sending device 100 adjusts the number of data packets 214 in a single data frame 210 according to the obtained clock count difference, generates indication information according to the adjustment, and sends both the indication information and the adjusted data frame 210 to the data receiving device. 300. The data receiving device 300 obtains the count value of the link clock of the synchronization link 200, and receives the data frame 210 according to the obtained count value of the link clock. After the data receiving device 300 receives the data frame 210, it will cache the received data frame 210. Within this buffering time difference, the data receiving device 300 determines whether the data frame 210 has been adjusted according to the instruction information. The number of data packets 214 has been adjusted. of data frame 210, and whether the adjusted data frame 210 adds data packets 214 or decreases data packets 214, and then adaptively adjusts the number of parsed data packets 214 from the data frame 210.

Exemplarily, the operation of the data sending device 100 to adjust the number of data packets 214 in the data frame 210 is as follows:

Take for example the data clock being slower than the link clock. As shown in Figure 5, there is a series of data frames 210 on the synchronization link 200. It is assumed that the data sending device 100 carries the data packets 214 in a group of four in a single data frame 210. When the data sending device 100 sends the first data frame 210 through the synchronization link 200, the data clock and the link clock begin to deviate, but the deviation is still small at this time and no obvious deviation has yet occurred. At this time, the data clock is generated from the data. Four data packets 214 are carried on the bearer part 212 of the first data frame 210 . With the transmission of data, when the data sending device 100 is preparing to transmit the third data frame 210 in the diagram, it is detected that the deviation between the data clock and the link clock accumulates over time. At this time, the data clock is already slower than the link clock. The time required for the road clock to transmit a data packet 214. At this time, the data sending device 100 only generates three data packets 214 from the data, and the synchronization link 200 has already transmitted the third data frame 210, so the data sending device 100 has already transmitted the third data frame 210. The device 100 puts three data packets 214 into the bearer part 212 of the third data frame 210, leaving one gap 215, and then sends the third data frame 210 to the data receiving device 300 through the synchronization link 200. While sending the third data frame 210, the data sending device 100 also generates an indication message and sends it to the data receiving device 300. The indication information indicates that the data receiving device 300 generates a gap 215 when sending the data frame 210.

Take for example the data clock being faster than the link clock. As shown in Figure 6, there is a series of data frames 210 on the synchronization link 200. It is assumed that the data sending device 100 carries the data packets 214 in a group of four in a single data frame 210. When the data sending device 100 sends the first data frame 210 through the synchronization link 200, the data clock and the link clock begin to deviate, but the deviation is still small at this time and no obvious deviation has yet occurred. At this time, the data clock is generated from the data. Four data packets 214 are carried on the bearer part 212 of the first data frame 210 . With the transmission of data, when the data sending device 100 is preparing to transmit the third data frame 210 in the diagram, it is detected that the deviation between the data clock and the link clock accumulates over time. At this time, the data clock is already faster than the link clock. The time it takes for the road clock to transmit a data packet 214. At this time, the data sending device 100 generates five data packets 214 from the data, and the synchronization link 200 is preparing to transmit the third data frame 210 and is not ready to start transmission. The fourth data frame 210. Therefore, the data sending device 100 puts five data packets 214 into the bearer part 212 of the third data frame 210 (that is, increases the number of data packets 214 transmitted in the third data frame 210), and then puts the third data packet 214 into the bearer part 212 of the third data frame 210. A data frame 210 is sent to the data receiving device 300 through the synchronization link 200. While sending the third data frame 210, the data sending device 100 also generates an indication message and sends it to the data receiving device 300. The indication information instructs the data receiving device 300 to add a data packet 214 when sending the third data frame 210. , so the data receiving device 300 increases the number of parsed data packets 214 transmitted in the third data frame 210 .

The above are two examples of adjusting the data packet 214 on the synchronization link. However, when multiple data packets 214 need to be adjusted, the number of multiple data packets 214 can be increased in one data frame 210, or The number of data packets 214 is increased in the plurality of data frames 210 respectively.

For example, as shown in FIG. 9A , when no deviation occurs, the first controller 110 converts the received data into 20 data packets 214 respectively, which are carried in five data frames 210 and transmitted to the data receiving device 300 , each data frame 210 carries four data packets 214. Taking the link clock as being faster than the data clock as an example, when transmission is to be performed, the first controller 110 finds that there is a deviation between the data clock and the link clock to transmit four data packets 214 . As shown in Figure 9B, the first controller 110 can add a data packet 214 to the data frame 210, that is, four data frames 210 are used to transmit 20 data packets 214 to the data receiving device 300. Each data frame 210 carries 5 packets 214. As shown in Figure 9C, the first controller 110 can use four data frames 210 to transmit 20 data packets 214 to the data receiving device 300. The first two data frames 210 each carry 6 data packets 214, and the last two data frames 210 carry 6 data packets 214 each. Each data frame 210 carries four data packets 214.

In some embodiments, the indication information includes adjustment direction information; the adjustment direction information indicates increasing the number of data packets 214 transmitted in the data frame 210; or the adjustment direction information indicates reducing the number of data packets 214 transmitted in the data frame 210.

By adjusting the direction information, the data sending device 100 can indicate to the data receiving device 300 whether to increase the number of data packets 214 transmitted in the data frame 210 or to decrease the number of data packets 214 transmitted in the data frame 210 . The data receiving device 300 can increase or decrease the number of data packets 214 transmitted in the parsed corresponding data frame 210 without additional judgment.

In some embodiments, the indication information also includes adjustment quantity information; the adjustment quantity information is an increased number of data packets transmitted in the data frame, or a decreased number of data packets transmitted in the data frame.

By adjusting the quantity information, the data sending device 100 can indicate to the data receiving device 300 that the specific number of data packets 214 transmitted in the data frame 210 has been increased or decreased, and the data receiving device 300 can increase or decrease the parsed corresponding data without additional judgment. The corresponding number of data packets 214 transmitted in frame 210.

In some embodiments, the indication information also includes an adjustment time point; the adjustment time point is used to indicate a time point to increase or decrease the number of data packets on the data frame, and the adjustment time point includes absolute time A or relative time B; absolute time A is the corresponding time point when the count value of the link clock is A; relative time B is the time point after time B has passed after the time point of the indication information.

The data sending device 100 sends the adjustment time point to the data receiving device 300. The data receiving device 300 can accurately find the data frame with the adjusted number of data packets 214 according to the adjustment time point, and perform corresponding adjustment operations.

In some embodiments, the time point when the data sending device 100 sends the indication information to the data receiving device 300 may be before or after the time point when the data frame 210 corresponding to the indication information is sent, or it may be the time point when the data frame 210 corresponding to the indication information is sent. 210 time point.

For example, when the data sending device 100 detects that the clock count difference reaches a certain value and a large deviation is about to result in gaps 215 or more data packets 214, the indication information can be sent to the data receiving device 300 first, and then the data sending device 100 can send the instruction information to the data receiving device 300. The data frame 210 with the adjusted number of data packets 214 may also be sent in the same message with the indication information and the data frame 210 with the adjusted number of data packets 214, or the data frame 210 with the adjusted number of data packets 214 may be sent first and then Send instructions again. Because after the data receiving device 300 receives the data frame 210, it needs to cache the data packet 214 in the data frame 210 before parsing the data packet 214. As long as the data receiving device 300 receives the instruction information during the period from buffering the data packet 214 in the data frame 210 to parsing the data packet 214 and adjusts the number of parsed data packets 214 in the corresponding data frame 210 according to the instruction information.

For example, as shown in FIG. 3 , the first controller 110 of the data sending device 100 includes a control module 111 , a deviation calculation module 112 and a clock synchronization module 113 . The clock control module 113 is used to obtain the count value of the link clock and the calculated value of the data clock within a preset time; the deviation calculation module 112 is used to calculate the link based on the count value of the link clock and the calculated value of the data clock within the preset time. The difference between the count value change of the channel clock and the count value change of the data clock is used to obtain the clock count difference; the control module 111 is used to pass the data in the form of a data packet 214 through the synchronization chain through the first communication interface 120 The data frame 210 of the path 200 is sent to the data receiving device 300; the control module 111 is also used to control the first communication interface 120 to adjust the number of data packets 214 transmitted on the current data frame 210 according to the clock count difference, and at the same time to the data receiving device 300. Device 300 sends instruction information.

In some implementations, the data carrying the data clock is audio data or video data.

In some implementations, as shown in FIG. 2 , the data sending device 100 further includes a first player 130 . The first controller 110 is configured to adjust the progress of playing audio data or video data on the first player 130 according to the clock count difference.

In some application scenarios, the data sending device 100 needs to send the received sampled audio data or video data to the data receiving device 300 through the synchronization link 200 . At the same time, the local end of the data sending device 100 also needs to play the audio data or video data synchronously with the data receiving device 300 side. Therefore, the first controller 110 of the data sending device 100 can adjust the progress of playing the audio data or video data on the first player 130 according to the clock count difference, thereby achieving synchronous playing of the audio data or video data with the data receiving device 300 .

S124. The first controller 110 adjusts the progress of playing audio data or video data on the first player 130 according to the clock count difference.

The data sending device 100 transmits data to the data receiving device 300 in real time. In some scenarios such as multimedia data applications, the data carrying the data clock is audio data or video data. When transmitting audio data or video data, the audio data or video data needs to be processed in real time on the data sending device 100 side. Play synchronously. The playback progress of the audio data and video data played on the first player 130 is adjusted through the clock count difference. The adjustment of the playback progress is essentially the amount of data sent by the first controller 110 to the first player 130, as long as the progress of the data sent by the first controller 110 to the first player 130 is consistent with the data frame passed by the first controller 110. If the progress of the data packets 214 transmitted by 210 is consistent, synchronous playback can be achieved.

In some implementations, as shown in FIG. 2 , the data receiving device 300 includes a second controller 310 and a second communication interface 320 . The second controller 310 is configured to receive the data packet 214 from the data frame 210 of the synchronization link 200 through the second communication interface 320, and parse the data packet 214 to obtain data. The second controller 310 is also configured to receive indication information through the second communication interface 320 and adjust the number of parsed data packets 214 from the data frame 210 according to the indication information.

S130. The second controller 310 receives the data packet 214 from the data sending device 100 from the data frame 210 in the synchronization link 200 through the second interface 320, and parses the data packet 214 to obtain data.

As an example, take the data clock being slower than the link clock. As shown in Figure 5, there is a series of data frames 210 on the synchronization link 200. It is assumed that the data sending device 100 carries the data packets 214 in a group of four in a single data frame 210. The data receiving device 300 receives the data frames 210 respectively, and parses the data of the four data packets 214 from the bearer part 212 of each data frame 210. Due to deviations, the third data frame 210 sent by the data sending device 100 carries three data packets 214 and a gap 215 in its carrying part 212 . At the same time, the data sending device 100 also sends instruction information to the data receiving device 300 to indicate that the number of data packets 214 in the data frame 210 has been adjusted, specifically to reduce the number of data frames 210, and then the data frame 210 is adjusted according to the received The instruction information reduces the number of parsed data packets 214 in the data frame 210 .

For example, if the received adjustment direction information indicates to increase the number of data packets 214 transmitted in the data frame 210, the second controller 310 increases the parsing of the data packets 214 received through the data frame 210; increases the number of parsed data packets 214. The number is the quantity corresponding to the adjusted quantity information.

If the received adjustment direction information indicates reducing the number of data packets 214 transmitted in the data frame 210, the second controller 310 reduces the number of parsed data packets 214 received through the data frame 210; and reduces the number of parsed data packets 214 to the adjusted number. The quantity corresponding to the information.

For example, the data receiving device 300 may set an adjustment number, and each time the indication information is received, increase or decrease the parsing of the data packets 214 transmitted in the set adjustment number of data frames 210 .

Or after receiving the instruction information, the data receiving device 300 correspondingly adjusts the number of data packets 214 in the parsed data frame 210 according to the adjustment quantity information in the instruction information. This method can achieve more accurate analysis of the data packets 214 in the data frame 210 and improve the quality of the analyzed data.

Illustratively, as shown in Figure 7, taking absolute time A as an example, assume that when preparing to send the second data frame 210, the data sending device 100 determines based on the clock count difference that it needs to be reduced in the third data frame 210. A packet of 214. Therefore, an indication information is sent while sending the second data frame 210. Because the link clock count value of the second data frame 210 is two, the absolute time A included in the indication information is the absolute time three, which represents means the time point corresponding to the third data frame 210. Then when the second controller 310 of the data receiving device 300 receives the instruction information, it can know based on the absolute time three that it is necessary to adjust the number of data packets 214 in the third data frame 210, and at the same time, according to the instruction information According to the adjustment direction information, it can be known that the number of parsed data packets 214 is reduced. According to the adjustment quantity information in the indication information, it can be known that one data packet 214 is parsed less.

As shown in Figure 8, taking relative time B as an example, assume that when preparing to send the second data frame 210, the data sending device 100 determines based on the clock count difference that it is necessary to reduce one data packet 214 in the third data frame 210. . Therefore, an indication information is sent while sending the second data frame 210, because there is a time point difference between the second data frame 210 and the third data frame 210. Therefore, relative time one is included in the instruction information. Then when the second controller 310 of the data receiving device 300 receives the instruction information, it can know based on the relative time therein that it is necessary to adjust the number of data packets 214 in the third data frame 210 and at the same time, according to the instruction information According to the adjustment direction information, it can be known that the number of parsed data packets 214 is reduced. According to the adjustment quantity information in the indication information, it can be known that one data packet 214 is parsed less.

In some implementations, as shown in FIG. 2 , the data receiving device 300 further includes a second player 330 . The second controller 310 is configured to transmit the audio data or video data parsed from the data packet 214 to the second player 330 for playing.

S140. The second controller 310 sends the analyzed audio data or video data to the second player 330 for playing.

For example, when the data sending device 100 includes the first player 130 and the data receiving device 300 includes the second player 330, the data sending device 100 can play audio on the first player 130 by adjusting the clock count difference. The progress of the data or video data, so that the first player 130 and the second player 330 can play the audio data or video data synchronously.

The data sending device, receiving device, transmission method and transmission system provided by the embodiments of the present application respectively obtain the count value of the data clock of the data and the count value of the link clock of the synchronization link, thereby calculating the clock count difference. The clock count difference calculates the deviation between the data clock and the link clock, adjusts the number of data packets in a single data frame on the synchronization link based on the calculated deviation, and sends indication information to the data receiving device. Through the above settings, the deviation between the data clock of the data in the synchronized wireless transmission and the link clock of the synchronized link is accurately measured, and the data packets are adjusted according to the measurement results, thereby avoiding the problem that the data receiving device is receiving data due to the deviation. Errors occur during the packetization process, ultimately affecting the quality of the data being transmitted.

An embodiment of the present application also provides a communication device. The communication device may be the data sending device 100 in the above method embodiment, or a device including the above data sending device 100, or a chip or functional module in the data sending device 100. Alternatively, the communication device may be the data receiving device 300 in the above method embodiment, or a device including the above data receiving device 300, or a chip or functional module in the data receiving device 300. Thus realizing the various methods mentioned above.

In order to realize the above functions, the communication device includes hardware structures and/or software modules corresponding to each function. Those skilled in the art can easily realize that the present application can be implemented in the form of hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Embodiments of the present application can divide the communication device into functional modules according to the above method embodiments. For example, functional modules can be divided into corresponding functional modules, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.

Figure 12 shows a schematic structural diagram of a communication device 500. The communication device 500 includes a processing module 510 and a transceiver module 520; the processing module 510 can also be called a processing unit to implement the data sending device or data in the above method embodiment. The processing functions of the receiving device. The transceiver module 520 may be called a transceiver circuit, transceiver, transceiver or communication interface, and is used to implement the transceiver function of the data sending device or data receiving device in the above method embodiment. The communication device 500 is caused to perform various functions or steps performed by the data sending device or the data receiving device in the above method embodiment, for example, the methods shown in FIG. 10 and FIG. 11 are executed.

Take the communication device 500 as the data receiving device in the above method embodiment as an example.

In a possible implementation, the transceiver module 520 is used to send data in the form of data packets to the data receiving device through the data frame of the synchronization link within a preset time; the data carries the data clock, the synchronization link It has a link clock; adjusts the number of data packets transmitted on the data frame, and sends indication information to the data receiving device, where the indication information is used to instruct the adjustment of the number of data packets transmitted on the data frame.

Take the communication device 500 as the data receiving device in the above method embodiment as an example.

In a possible implementation, the transceiver module 520 is configured to receive data packets through the data frame of the synchronization link, and receive indication information; the indication information is used to indicate adjusting the number of data packets transmitted on the data frame; the data packet carries Data; the data carries the data clock, and the synchronization link has a link clock; adjusts and parses the number of data packets received through the data frame according to the instruction information.

The embodiment of this application also provides a chip system 400. As shown in FIG. 13 , the chip system 400 includes at least one processor 401 and at least one interface circuit 402 . At least one processor 401 and at least one interface circuit 402 may be interconnected via lines. The processor 401 is used to support the chip system 400 to implement various functions or steps in the above method embodiments. At least one interface circuit 402 can be used to receive signals from other devices (such as memory) or send signals to other devices (such as communication interfaces). . The chip system 400 may include chips and may also include other discrete devices.

The embodiment of the present application also proposes a computer-readable storage medium. The computer-readable storage medium includes instructions. When the instructions are run on the above-mentioned chip system 2, the chip system 2 is caused to perform each function or step in the above-mentioned method embodiment. , for example, perform the method shown in Figure 10 or Figure 11.

The embodiment of the present application also proposes a computer program product including instructions. When the instructions are run on the above-mentioned chip system 2, the chip system 2 is caused to perform various functions or steps in the above-mentioned method embodiments, for example, as shown in FIG. 10 or FIG. The method shown in 11.

Regarding the technical effects of communication devices, chip systems, computer-readable storage media, and computer program products, refer to the technical effects of the previous method embodiments.

The processor involved in the embodiment of this application may be a chip. For example, it can be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), or a central processing unit It can be a central processor unit (CPU), a network processor (NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (micro controller unit, MCU). , it can also be a programmable logic device (PLD) or other integrated chip.

The memory involved in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of illustration, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

It should be understood that in the various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

Those of ordinary skill in the art can appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components may be combined or can be integrated into another device, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or modules, which may be in electrical, mechanical or other forms.

The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located on one device, or they may be distributed to multiple devices. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in each embodiment of the present application can be integrated in one device, or each module can exist physically alone, or two or more modules can be integrated in one device.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or include one or more data storage devices such as servers and data centers that can be integrated with the medium. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), etc.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (21)

1. A data sending device, characterized in that it is used to transmit data to a data receiving device through a data frame in a synchronization link; the data carries a data clock, and the synchronization link has a link clock; the data sending The device includes: a first controller and a first communication interface;

   The first controller is used for:

   Control the first communication interface to send the data in the form of data packets through the data frame to the data receiving device within a preset time;

   Obtain the count value of the link clock and the count value of the data clock within the preset time;

   Calculate the clock count difference; the clock count difference is the difference between the count value change of the link clock and the count value change of the data clock within the preset time;

   According to the clock count difference, the first communication interface is controlled to adjust the number of data packets transmitted by the data frame, and sends instruction information to the data receiving device, where the instruction information is used to instruct the adjustment of the data packets. The number of packets transmitted on the data frame.
2. The device according to claim 1, wherein the indication information includes adjustment direction information;

   The adjustment direction information indicates increasing the number of the data packets transmitted in the data frame;

   or,

   The adjustment direction information indicates reducing the number of data packets transmitted in the data frame.
3. The device according to claim 2, wherein the indication information further includes adjustment quantity information;

   When the adjustment direction information indicates increasing the number of the data packets transmitted in the data frame, the adjustment quantity information is the increased number of the data packets transmitted in the data frame,

   or,

   When the adjustment direction information indicates reducing the number of the data packets transmitted in the data frame, the adjustment quantity information is the reduced number of the data packets transmitted in the data frame.
4. The device according to claim 2 or 3, characterized in that the instruction information also includes an adjustment time point;

   The adjustment time point is used to indicate the time point at which the number of data packets is increased or decreased on the data frame, and the adjustment time point includes absolute time A or relative time B;

   The absolute time A is the corresponding time point when the count value of the link clock is A;

   The relative time B is a time point after the time point of the indication information and time B has passed.
5. The device according to any one of claims 1-4, characterized in that the data is audio data or video data.
6. The device according to claim 5, wherein the data sending device further includes a first player;

   The first controller is further configured to adjust the progress of playing the audio data or video data on the first player according to the clock count difference.
7. A data receiving device, characterized in that it is used to receive a data packet from a data sending device through a data frame in a synchronization link, the data packet carries data; the data carries a data clock, and the synchronization link Having a link clock; the data receiving device includes: a second controller and a second communication interface;

   The second controller is used for:

   Control the second communication interface, receive the data packet through the data frame, and receive indication information, the indication information being used to indicate adjusting the number of the data packets transmitted on the data frame;

   Adjust and parse the number of data packets received through the data frame according to the indication information.
8. The device according to claim 7, wherein the indication information includes adjustment direction information;

   The adjustment direction information indicates increasing the number of the data packets transmitted in the data frame;

   or,

   The adjustment direction information indicates reducing the number of data packets transmitted in the data frame;

   The second controller is used for:

   If the received adjustment direction information indicates increasing the number of the data packets transmitted in the data frame, increasing the number of parsing the data packets received through the data frame;

   If the received adjustment direction information indicates reducing the number of the data packets transmitted in the data frame, reducing the number of parsed data packets received through the data frame.
9. The device according to claim 8, characterized in that the indication information further includes adjustment quantity information; the adjustment quantity information is the increased number of the data packets transmitted in the data frame, or the number of data packets transmitted in the data frame. the reduced number of said data packets transmitted in the frame;

   The second controller is used for:

   If the received adjustment direction information indicates increasing the number of data packets transmitted in the data frame, then increasing parsing of the data packets received through the data frame; increasing the number of parsed data packets as The adjustment quantity information;

   If the received adjustment direction information indicates reducing the number of data packets transmitted in the data frame, then parsing the data packets received through the data frame is reduced; reducing the number of parsed data packets is The adjustment quantity information.
10. The device according to claim 8 or 9, characterized in that the instruction information further includes an adjustment time point;

    The adjustment time point is used to indicate the time point at which the number of data packets is increased or decreased on the data frame, and the adjustment time point includes absolute time A or relative time B;

    The absolute time A is the corresponding time point when the count value of the link clock is A;

    The relative time B is the time point after time B has passed after the time point of the indication information;

    The second controller is used for:

    If the received adjustment direction information indicates increasing the number of the data packets transmitted in the data frame, then after the adjustment time point, increase the number of parsed data packets received through the data frame;

    If the received adjustment direction information indicates reducing the number of data packets transmitted in the data frame, then after the adjustment time point, reduce the number of parsed data packets received through the data frame.
11. The device according to any one of claims 7-10, characterized in that the data is audio data or video data.
12. A data transmission method, characterized by including:

    Within a preset time, the data is sent to the data receiving device in the form of data packets through the data frame of the synchronization link; the data carries a data clock, and the synchronization link has a link clock;

    Obtain the count value of the link clock and the count value of the data clock within the preset time;

    Calculate the clock count difference; the clock count difference is the difference between the count value change of the link clock and the count value change of the data clock within the preset time;

    According to the clock count difference, adjust the number of data packets transmitted in the data frame, and send instruction information to the data receiving device, where the instruction information is used to instruct to adjust the number of data packets transmitted in the data frame. The number of packets.
13. The method according to claim 12, wherein the indication information includes adjustment direction information;

    The adjustment direction information is used to indicate increasing the number of the data packets transmitted in the data frame;

    or,

    The adjustment direction information is used to indicate reducing the number of data packets transmitted in the data frame.
14. The method according to claim 13, wherein the indication information further includes adjustment quantity information;

    When the adjustment direction information indicates increasing the number of the data packets transmitted in the data frame, the adjustment quantity information is the increased number of the data packets transmitted in the data frame,

    or,

    When the adjustment direction information indicates reducing the number of the data packets transmitted in the data frame, the adjustment quantity information is the reduced number of the data packets transmitted in the data frame.
15. The method according to claim 13 or 14, characterized in that the instruction information also includes an adjustment time point;

    The adjustment time point is used to indicate the time point at which the number of data packets is increased or decreased on the data frame, and the adjustment time point includes absolute time A or relative time B;

    The absolute time A is the corresponding time point when the count value of the link clock is A;

    The relative time B is a time point after the time point of the indication information and time B has passed.
16. The method according to any one of claims 12 to 15, characterized in that the data is audio data or video data.
17. A data transmission method, characterized by including:

    Data packets are received through the data frame of the synchronization link, and indication information is received; the indication information is used to indicate adjusting the number of data packets transmitted on the data frame; the data packets carry data; the data Carrying a data clock, the synchronization link has a link clock;

    Adjust and parse the number of data packets received through the data frame according to the indication information.
18. The method according to claim 17, wherein the indication information includes adjustment direction information;

    The adjustment direction information indicates increasing the number of the data packets transmitted in the data frame;

    or,

    The adjustment direction information indicates reducing the number of data packets transmitted in the data frame;

    If the received adjustment direction information indicates increasing the number of the data packets transmitted in the data frame, increasing the number of parsing the data packets received through the data frame;

    If the received adjustment direction information indicates reducing the number of the data packets transmitted in the data frame, reducing the number of parsed data packets received through the data frame.
19. The method according to claim 18, characterized in that the indication information further includes adjustment quantity information; the adjustment quantity information is an increased number of the data packets transmitted in the data frame, or the number of data packets transmitted in the data frame. the reduced number of said data packets transmitted in the frame;

    If the received adjustment direction information indicates increasing the number of data packets transmitted in the data frame, then increasing parsing of the data packets received through the data frame; increasing the number of parsed data packets as The adjustment quantity information;

    If the received adjustment direction information indicates reducing the number of data packets transmitted in the data frame, then parsing the data packets received through the data frame is reduced; reducing the number of parsed data packets is The adjustment quantity information.
20. The method according to claim 18 or 19, characterized in that the instruction information also includes an adjustment time point;

    The adjustment time point is used to indicate the time point at which the number of data packets is increased or decreased on the data frame, and the adjustment time point includes absolute time A or relative time B;

    The absolute time A is the corresponding time point when the count value of the link clock is A;

    The relative time B is the time point after time B has passed after the time point of the indication information;

    If the received adjustment direction information indicates increasing the number of the data packets transmitted in the data frame, then after the adjustment time point, increase the number of parsed data packets received through the data frame;

    If the received adjustment direction information indicates reducing the number of data packets transmitted in the data frame, then after the adjustment time point, reduce the number of parsed data packets received through the data frame.
21. A data transmission system, characterized by comprising the data sending device according to any one of claims 1-6 and the data receiving device according to any one of claims 7-11;

    The data sending device is used to send data in the form of data packets to the data receiving device through the data frame of the synchronization link, and at the same time, also sends indication information to the data receiving device through the synchronization link; The data carries a data clock, and the indication information is used to indicate adjusting the number of the data packets transmitted on the data frame;

    The data receiving device is configured to receive the data packet and the indication information from the synchronization link, analyze the data packet to obtain the data, and adjust and parse the data received through the data frame according to the indication information. The number of packets.

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