TWI723440B - Multimedia playing system and method for controlling playing condition of multimedia file - Google Patents

Abstract

The disclosure provides a multimedia playing system and a method for controlling a playing condition of a multimedia file. The method includes: generating a play parameter according to an external environment when the play device plays the multimedia file, and adjusting a play condition of the play device for the multimedia file; determining whether to provide a control of the play parameter of the multimedia file to a user of an electronic device; in response to determining to provide the control of the play parameter to the user of the electronic device, adjusting the play condition of the play device for the multimedia file according to the play parameters set by the user to the multimedia file; in response to determining not providing the control of the play parameter to the user, ignoring the play parameter set by the user to the multimedia file.

Description

Multimedia playing system and method for controlling the playing situation of multimedia files

The present invention relates to a multimedia playing system and method, and more particularly to a multimedia playing system and a method for controlling the playing situation of multimedia files.

In public places, when certain people are listening to music and watching movies, the sound of the earphones may overflow due to the loudness of the sound, which may affect people nearby.

At present, in terms of products or patents, the methods for preventing earphone sound from leaking are limited to hardware design, such as ear canal earphones and over-ear earphones that can be used to prevent sound leaking, but the prices of these products are mostly high.

In addition, another disadvantage of preventing sound leakage with hardware design is that the earmuffs or ear canal plugs will inevitably wear out after a long time, which may cause the effect of preventing sound leakage to become worse and worse. Moreover, this design does not take into account the situations when the user’s music is loud, the user does not wear the headset, or the headset is not properly worn, so the sound of the headset still has a high probability of leakage. Therefore, for those skilled in the art, how to design a mechanism to prevent earphone sound from leaking out is really an important issue.

In view of this, the present invention provides a multimedia playback system and a method for controlling the playback situation of multimedia files, which can be used to solve the above technical problems.

The invention provides a multimedia playback system, which includes a playback device and an electronic device. The playback device is used for playing multimedia files. The electronic device is equipped with the playback device, and is configured to: generate a playback parameter of the multimedia file according to an external environment when the playback device is playing the multimedia file, and adjust the playback situation of the multimedia file by the playback device accordingly; The playback situation or an operation situation of the multimedia playback system determines whether to provide a control right of a playback parameter of the multimedia file to a user of the electronic device; in response to the determination that the control right of the playback parameter is provided to the user of the electronic device, according to the use The user adjusts the playback conditions of the multimedia file by the playback device for the playback parameters set by the multimedia file; responds to the determination that the user who does not provide the control of the playback parameters to the user of the electronic device, ignores the playback parameters set by the user for the multimedia file.

The present invention provides a method for controlling the playing situation of multimedia files, which is suitable for electronic devices in multimedia playing systems. The method includes: controlling a playback device to play a multimedia file, wherein the playback device is equipped with an electronic device; generating a playback parameter of the multimedia file according to an external environment when the playback device is playing the multimedia file, and adjusting the playback device to the multimedia file accordingly According to a playback situation of the multimedia file or an operation situation of the multimedia playback system, determine whether to provide a control right of a playback parameter of the multimedia file to a user of the electronic device; respond to the decision to provide the control right of the playback parameter For the user of the electronic device, adjust the playback device's playback status of the multimedia file according to the playback parameters set by the user for the multimedia file; respond to the decision not to provide the control of the playback parameter to the user of the electronic device, and ignore the user's multimedia file Set playback parameters.

Based on the above, the method of the present invention can adaptively generate the playback parameters of the multimedia file according to the external environment of the playback device, and adjust the playback situation of the multimedia file by the playback device accordingly (for example, lower the volume). In this way, it is possible to prevent the playback device from affecting other users due to sound leakage and other situations. In addition, after adjusting the playback situation of the multimedia file, the method of the present invention can also determine whether to provide the user with the control right of the playback parameter according to the playback situation of the multimedia file or the operation situation of the multimedia playback system, so as to prevent the user from being Perform operations such as increasing the volume again while paying attention.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

Please refer to FIG. 1, which is a schematic diagram of a multimedia playback system according to an embodiment of the present invention. In FIG. 1, the multimedia playback system 100 may include a playback device 110 and an electronic device 120. In different embodiments, the playback device 110 is, for example, a device that can be used to play multimedia files, such as wired earphones, wireless earphones, or the like, but it may not be limited thereto. The electronic device 120 is, for example, a device that can be equipped with the playback device 110 and used to control the playback device 110 to play multimedia files, such as a smart phone, a tablet computer, a personal computer, a notebook computer, etc., but it is not limited thereto.

In this embodiment, the electronic device 120 may include a storage circuit 121, an image capturing circuit 122 and a processor 123. The storage circuit 121 is, for example, any type of fixed or removable random access memory (Random Access Memory, RAM), read-only memory (Read-Only Memory, ROM), flash memory (Flash memory), hard disk Disk or other similar devices or a combination of these devices can be used to record multiple codes or modules.

The imaging circuit 122 may be any lens with a charge coupled device (CCD) lens or a complementary metal oxide semiconductor transistor (CMOS) lens. In the embodiment of the present invention, the image capturing circuit 122 can be used to capture an image of a user who is operating the electronic device 120 (hereinafter referred to as an operating image), but it is not limited to this.

The processor 123 is coupled to the storage circuit 121 and the image capturing circuit 122, and can be a general purpose processor, a special purpose processor, a traditional processor, a digital signal processor, multiple microprocessors, one or more A microprocessor, controller, microcontroller, Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA), and any other types combined with the core of the digital signal processor Integrated circuits, state machines, processors based on Advanced RISC Machine (ARM) and similar products.

In the embodiment of the present invention, the processor 123 can access the modules and program codes recorded in the storage circuit 121 to implement the method for controlling the playback situation of multimedia files proposed by the present invention. The details are described below.

Please refer to FIG. 2, which is a flowchart of a method for controlling the playback of multimedia files according to an embodiment of the present invention. The method of this embodiment can be executed by the multimedia playback system 100 in FIG. 1. The steps in FIG. 2 will be described below in conjunction with the components shown in FIG. 1.

First, in step S210, the electronic device 120 can control the playback device 110 to play the multimedia file. For ease of description, in the following embodiments, it is assumed that the playback device 110 is a headset, and it is controlled by the electronic device 120 to play multimedia files (such as music files or audio components of video files), but it is not limited to this.

In step S220, the electronic device 120 can generate the playback parameters of the multimedia file according to the external environment when the playback device 110 plays the multimedia file, and adjust the playback situation of the multimedia file by the playback device 110 accordingly. In one embodiment, the electronic device 120 can detect the external environment of the playback device 110 when the multimedia file is played through related sensors. For ease of description, it is assumed below that the external environment to be detected by the electronic device 120 is the external sound of the playback device 110, and the electronic device 120 may collect the above-mentioned external sound through components such as a radio device (such as a microphone). In other embodiments, the above-mentioned radio device for collecting external sounds can also be installed on the playback device 110, and can transmit the collected external sounds to the electronic device 120 for subsequent processing and analysis, but the present invention is not limited to this.

Then, in response to the external environment meeting the parameter adjustment condition, the electronic device 120 can generate the above-mentioned playback parameters, and adjust the playback situation of the multimedia file by the playback device 110 accordingly. In one embodiment, if the electronic device 120 determines that the measured external sound is from the sound leaked by the playback device 110, the electronic device 120 can use a lower volume as the aforementioned playback parameter accordingly, and play it through this The parameter controls the playback device 110 to play at a lower volume, thereby improving the situation of sound leakage. In other embodiments, the aforementioned playback parameters may also be equalizer parameters, playback style parameters, or other similar parameters, but are not limited thereto. Relevant details will be further explained with Figure 3 later.

In step S230, the electronic device 120 can determine whether to provide the user of the electronic device 120 with the control right of the playback parameters of the multimedia file according to the playback situation of the multimedia file or the operation situation of the multimedia playback system 100. If so, the electronic device 120 can adjust the playback status of the multimedia file by the playback device 110 according to the playback parameters set by the user for the multimedia file in step S240; if not, the electronic device 120 can ignore the user's settings for the multimedia file in step S250. Play parameters.

Roughly speaking, in some embodiments, the user may not notice the playback situation of the playback device 110 (for example, not wearing the playback device 110 or the person is not in front of the electronic device 110) or excessively focusing on watching multimedia files. Notice the sound leakage. In this case, if the user is still allowed to control the playback parameters, the user may increase the volume again after feeling the volume drop, which further worsens the sound leakage. Therefore, the electronic device 120 can perform step S230 through the following mechanism to determine whether to provide the user of the electronic device 120 with the control right of the playback parameters of the multimedia file.

In one embodiment, the electronic device 120 can obtain an operation image of the user operating the multimedia playback system 100 through the image capturing circuit 122, and recognize the user's operation context of the multimedia playback system 100 based on the operation image. In response to the operating situation of the multimedia playback system 100 indicating that the user cannot perceive the playback situation of the multimedia file, or focus on perceiving the playback situation of the multimedia file, it is determined not to provide the user of the electronic device 120 with the control of the playback parameters, and vice versa. The control right of the playback parameters is provided to the user of the electronic device 120.

In one embodiment, if the operating image shows that the user is not wearing the playback device or is not in front of the electronic device, the electronic device 120 may determine that the operating context of the multimedia playback system 100 indicates that the user cannot perceive the multimedia file. For example, the electronic device 120 may input the obtained operation image to a convolutional neural network that has undergone a certain training process, so that the convolutional neural network can recognize the user's operation situation of the multimedia playback system 100 based on the operation image.

For example, in the training process of the above-mentioned convolutional neural network, it can learn the characteristics of the content to be recognized based on a plurality of labeled training images. Assuming that the aforementioned convolutional neural network is used to identify whether the user is not wearing the playback device 110, the relevant training images may be multiple user images who are not wearing the playback device. In this way, the above-mentioned convolutional neural network can learn what characteristics the user's image without wearing a playback device will have. Therefore, after the above-mentioned convolutional neural network is trained, it can be recognized based on the received operation images whether the user in it is wearing a playback device.

For another example, suppose the above-mentioned convolutional neural network is used to identify whether the user is not in front of the electronic device 120, then the related training images may be multiple images of the user not in front of the electronic device. In this way, the above-mentioned convolutional neural network can learn the characteristics of the image that the user is not in front of the electronic device. Therefore, after the above-mentioned convolutional neural network is trained, it can be recognized based on the received operation images whether the user is not in front of the electronic device.

For another example, suppose the above-mentioned convolutional neural network is used to identify whether the user is focused on viewing the playback situation of the multimedia file, then the relevant training image can be the facial expression image of the user focused on viewing the multimedia file. In this way, the above-mentioned convolutional neural network can learn what characteristics the facial expression image of the user who focuses on viewing the multimedia file will have. Therefore, after the above-mentioned convolutional neural network is trained, it can be recognized based on the received operation images whether the user in it is focused on viewing multimedia files.

In another embodiment, the electronic device 120 can also obtain the current playback segment of the multimedia file, and determine whether the playback segment belongs to a specific part of the multimedia file, so as to identify the playback context of the multimedia file. In response to the playback segment belonging to a specific part of the multimedia file, the electronic device 120 may determine not to provide the user of the electronic device 120 with the control of the playback parameters, otherwise it may determine to provide the user of the electronic device 120 with the control of the playback parameters .

In one embodiment, the electronic device 120 may input the obtained playback segment to a recurrent neural network that has undergone a certain training process, so that the recurrent neural network can identify the playback context of the multimedia file based on the playback segment. In different embodiments, if the multimedia file is a video, the above-mentioned specific part may be a highlight segment in it, and if the multimedia file is an audio file, the above-mentioned specific part may be a chorus in it, but the present invention is not limited to this.

For example, in the training process of the recurrent neural network, it can learn the characteristics of the content to be recognized based on a plurality of labeled training data. Assuming that the above-mentioned recurrent neural network is used to identify whether the playback segment is a chorus, the relevant training data may be the chorus part of multiple audio files. In this way, the recurrent neural network can learn what characteristics the chorus part of the audio file will have. Therefore, after the above-mentioned recurrent neural network is trained, it can be identified based on the received playback segment whether it is the chorus part of the audio file.

For another example, suppose that the above-mentioned recurrent neural network is used to identify whether the playback segment is a highlight segment in a video, and the relevant training data may be a highlight segment of multiple video files. In this way, the above-mentioned recurrent neural network can learn what characteristics the highlights of the video file will have. Therefore, after the above-mentioned recurrent neural network is trained, it can identify whether it is a highlight of the video file based on the received playback segment.

It can be seen from the above that the method of the present invention can adaptively generate the playback parameters of the multimedia file according to the external environment of the playback device, and adjust the playback situation of the multimedia file by the playback device accordingly (for example, lower the volume). In this way, it is possible to prevent the playback device from affecting other users due to sound leakage. Moreover, after adjusting the playback situation of the multimedia file, the method of the present invention can also be based on the playback situation of the multimedia file (for example, whether a chorus or highlight is being played) or the operating situation of the multimedia playback system (for example, whether the user is not in front of the electronic device). , Not wearing a playback device or excessively immersed in watching multimedia files) to determine whether to provide the user with the control of the playback parameters, so as to prevent the user from performing operations such as increasing the volume again without paying attention.

Please refer to FIG. 3, which is a flowchart of generating playback parameters and adjusting the playback situation of the multimedia file according to FIG. 2. First, in step S310, the electronic device 120 can detect the external sound in response to the playback device 110 playing the multimedia file. In an embodiment, the electronic device 120 may first determine whether the playback device 110 (such as a headset) is detected, and if so, control the radio device of the electronic device 120 to detect the external sound of the electronic device 120. If the electronic device 120 detects external sound through the radio device, it can continue to perform the subsequent steps to start the mechanism to prevent the sound of the playback device 110 from leaking out.

In step S320, the electronic device 120 may determine whether the volume of the external sound is greater than the volume threshold. In one embodiment, the volume threshold can be set according to the needs of the designer. For example, the volume threshold may be set to half of the volume of the electronic device 120 input to the playback device 110. In this case, if the volume of the external sound is judged to be greater than the volume threshold, it means that the external sound is too loud and is less likely to leak from the playback device 110, so the prevention of the sound of the playback device 110 from leaking can be ended. mechanism.

On the other hand, if the volume of the external sound is not greater than the volume threshold, it means that the external sound may leak from the playback device 110. Therefore, the electronic device 120 can continue to perform step S330 to obtain the audio signal corresponding to the external sound.

In one embodiment, the electronic device 120 can compare the audio signal with the audio component of the multimedia file to determine whether the audio signal matches the audio component of the multimedia file. For example, the electronic device 120 may record audio and waveforms according to the time sequence of the received external sounds as the audio signals of the external sounds.

Then, the electronic device 120 can perform analysis according to the time series and frequency of the audio signal. Assuming that the electronic device 120 obtains an audio signal with a length of 15 seconds, the electronic device 120 can extract the segment from the current to 15 seconds ago from the audio component of the multimedia file, and determine whether the frequency of the extracted segment is the same as the audio signal The frequency is the same. If so, the electronic device 120 can determine that the audio signal matches the audio component of the multimedia file, and vice versa, but the invention is not limited to this.

Then, in step S340, in response to the audio signal matching the audio component of the multimedia file, the electronic device 120 can determine that the external environment meets the parameter adjustment condition, and generate a specific volume as the playback parameter. In one embodiment, the electronic device 120 can obtain the current volume when the playback device 110 plays the multimedia file, and subtract the volume of the external sound from the current volume to generate the specific volume (which is smaller than the current volume). In other embodiments, other mechanisms may be used to generate the specific volume, such as subtracting a certain value from the current volume to generate the specific volume, but it is not limited to this.

In step S350, the electronic device 120 may adjust the playback volume of the multimedia file played by the playback device 110 to a specific volume. In this way, the playback device 110 can be played at a lower volume, thereby improving the situation of sound leakage.

In one embodiment, after performing step S350, the electronic device 120 may perform steps S310 and S320 again to confirm whether the reduced volume actually prevents sound leakage from the playback device 110.

It should be understood that if the user manually adjusts the playback parameters of the multimedia file after the electronic device 120 adjusts the playback conditions of the multimedia files according to the generated playback parameters (such as volume), the entire mechanism for adjusting the playback conditions may be meaningless. . Therefore, the present invention further proposes a mechanism to further adjust the playback parameters by using a reinforcement learning model to make the generated playback parameters more appropriate. The detailed description is as follows.

Please refer to FIG. 4, which is a flowchart of adjusting a reinforcement learning model according to an embodiment of the present invention. In this embodiment, after executing the method of FIG. 2, the electronic device 120 may further perform step S410 to determine whether it is detected that the user adjusts the playback parameters, or whether the external environment of the playback device 110 when playing the multimedia file meets the parameters Adjust the conditions. If yes (that is, it is detected that the user adjusts the playback parameters, or the external environment meets the parameter adjustment conditions), the electronic device 120 may adjust multiple weight values in the reinforcement learning model 400 based on the weight adjustment signal to train reinforcement learning Model 400. In one embodiment, the weight adjustment signal may be a punishment signal, and the training learner used to manage the reinforcement learning model 400 in the electronic device 120 may send the punishment signal to request multiple of the reinforcement learning model 400 The weight value is used to train the reinforcement learning model 400. After that, the electronic device 120 can use the trained reinforcement learning model 400 to generate another playback parameter (for example, another volume), and adjust the playback situation of the multimedia file by the playback device 110 (for example, adjust the volume) accordingly.

On the other hand, if the electronic device 120 neither detects that the user adjusts the playback parameters nor detects that the external environment meets the parameter adjustment conditions in step S410, the electronic device 120 may maintain the weight value of the reinforcement learning model 400. In one embodiment, the weight maintenance signal may be a reward signal, and the training learner of the reinforcement learning model 400 may send the reward signal to the reinforcement learning model to maintain the weight value in the reinforcement learning model 400. After that, the electronic device 120 can maintain the playback parameters without adjusting the playback status of the multimedia file by the playback device (for example, not adjusting the volume).

In one embodiment, after the electronic device 120 no longer sends the weight adjustment signal, it means that the reinforcement learning model 400 has completed training. At this time, the electronic device 120 can trim and optimize the reinforcement learning model 400 so as to achieve the effect of real-time reasoning when applied in real time. In one embodiment, the electronic device 120 can convert the optimized and trimmed reinforcement learning model 400 into ini files, xml files, and other file types that are easier to recognize by programs, thereby speeding up the inference.

In summary, the system and method proposed by the present invention can generate playback parameters (for example, volume) for adjusting the playback situation of multimedia files according to the external environment of the playback device. In this way, situations such as sound leakage from the playback device can be avoided. Moreover, the user can achieve the effect of preventing sound leakage without special purchase of ear canal earphones or over-ear earphones.

In addition, the present invention can also determine whether the user has not noticed the playback status of the playback device (for example, the playback device is not worn or the person is not in front of the electronic device) or is over-focused on watching multimedia files through a certain mechanism, and then determines whether the playback parameters are changed. Control is provided to the user.

In addition, the present invention can further train the reinforcement learning model by adjusting the weight value of the relevant reinforcement learning model when the user adjusts the playback parameters separately or the external environment meets the parameter adjustment conditions, and uses the trained reinforcement learning model Produce more appropriate playback parameters.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

100: Multimedia playback system 110: playback device 120: Electronic device 121: Storage circuit 122: Capture circuit 123: Processor S210~S250, S310~S350, S410: steps

Fig. 1 is a schematic diagram of a multimedia playback system according to an embodiment of the present invention. FIG. 2 is a flowchart of a method for controlling the playback of multimedia files according to an embodiment of the present invention. FIG. 3 is a flowchart of generating playback parameters and adjusting the playback situation of the multimedia file according to FIG. 2. Fig. 4 is a flowchart of adjusting a reinforcement learning model according to an embodiment of the present invention.

S210~S250: Steps

Claims (12)

A multimedia playback system includes: a playback device for playing multimedia files; and an electronic device that is matched to the playback device and is configured to generate the multimedia file according to an external environment when the playback device is playing the multimedia file A playback parameter of the multimedia file, and adjust a playback situation of the multimedia file by the playback device accordingly; determine whether the playback parameter of the multimedia file is based on a playback situation of the multimedia file or an operation situation of the multimedia playback system A control right of is provided to a user of the electronic device; in response to a determination that the user who provides control of the playback parameter to the electronic device is provided, the playback device is adjusted according to the playback parameter set by the user for the multimedia file Regarding the playback situation of the multimedia file; responding to the determination that the user who does not provide control of the playback parameter to the electronic device, ignores the playback parameter set by the user for the multimedia file, wherein the electronic device is configured with : Obtain a current playback segment of the multimedia file, and determine whether the playback segment belongs to a specific part of the multimedia file, so as to identify the playback context of the multimedia file; and reflect that the playback segment belongs to the specific part of the multimedia file Part, it is determined not to provide the control right of the playback parameter to the user of the electronic device, otherwise it is determined to provide the control right of the playback parameter to the electronic device The user. The multimedia playback system as described in claim 1, wherein the electronic device includes an image capturing circuit, and the electronic device is configured to: obtain an operating image of the user operating the multimedia playback system through the image capturing circuit ; Based on the operating image to identify the user's operating context of the multimedia playback system; responding to the operating context of the multimedia playback system indicates that the user cannot perceive the playback situation of the multimedia file, or focus on perceiving the multimedia file In the playing situation, it is determined not to provide the control right of the playing parameter to the user of the electronic device, otherwise it is determined to provide the control right of the playing parameter to the user of the electronic device. The multimedia playback system according to the second item of the scope of patent application, wherein the electronic device is configured to input the operating image into a convolutional neural network to identify the operating context of the multimedia playback system by the user. For example, in the multimedia playback system described in item 2 of the scope of patent application, wherein the operation image shows that the user is not wearing the playback device or is not in front of the electronic device, it is determined that the operation situation of the multimedia playback system indicates that the user cannot Perceive the multimedia file. For example, in the multimedia playback system described in item 1 of the scope of patent application, the multimedia file is an audio file, and the specific part is a chorus of the audio file. The multimedia playback system as described in claim 1, wherein the electronic device is configured to input the playback segment into a recurrent neural network to identify the operating context of the multimedia playback system by the user. For example, in the multimedia playback system described in claim 1, wherein the electronic device is configured to: detect the external environment when the playback device is playing a multimedia file; and respond to the external environment meeting a parameter adjustment condition to generate the Playing parameters, and adjusting the playing situation of the multimedia file by the playing device accordingly. Such as the multimedia playback system described in claim 7, wherein the electronic device is configured to: (a) detect an external sound in response to the playback device playing the multimedia file; (b) respond to the external sound If the volume is greater than a volume threshold, an audio signal corresponding to the external sound is obtained; (c) responding to the audio signal matching the audio component of the multimedia file, determining that the external environment meets the parameter adjustment condition, and generating a specific volume As the playback parameter; (d) adjusting a playback volume of the multimedia file played by the playback device to the specific volume; (e) returning to step (a) until the volume of the external sound is not greater than the volume threshold. The multimedia playback system described in item 8 of the scope of patent application, wherein the electronic device is configured to: obtain a current volume when the playback device plays the multimedia file; The volume of the external sound is subtracted from the current volume to generate the specific volume. For example, in the multimedia playback system described in claim 1, wherein the electronic device is further configured to respond to detecting that the user adjusts the playback parameter, or that the playback device is playing a multimedia file in accordance with an external environment A parameter adjustment condition adjusts multiple weight values in a reinforcement learning model based on a weight adjustment signal to train the reinforcement learning model; uses the trained reinforcement learning model to generate another playback parameter, and adjusts the playback device accordingly For the playback situation of the multimedia file. For example, in the multimedia playback system described in claim 10, in response to the fact that the user is not detected to adjust the playback parameter, and the external environment does not meet the parameter adjustment condition, the electronic device is further configured to: The weight maintenance signal maintains the weight values of the reinforcement learning model; maintains the playback parameters, and does not adjust the playback situation of the multimedia file by the playback device. A method for controlling the playback of multimedia files is suitable for an electronic device in a multimedia system playback system. The method includes: controlling a playback device to play multimedia files, wherein the playback device is matched to the electronic device; An external environment during multimedia file generation generates a playback parameter of the multimedia file, and adjusts a playback situation of the multimedia file by the playback device accordingly; Determine whether to provide a control right of the playback parameter of the multimedia file to a user of the electronic device according to a playback situation of the multimedia file or an operation situation of the multimedia playback system; in response to determining the control right of the playback parameter Provided to the user of the electronic device, adjust the playback situation of the multimedia file by the playback device according to the playback parameter set by the user on the multimedia file; in response to determining that the playback parameter control right is not provided to the electronic device The user of the device ignores the playback parameter set by the user for the multimedia file, wherein the method further includes: obtaining a current playback segment of the multimedia file, and determining whether the playback segment belongs to a specific part of the multimedia file , In order to identify the playback context of the multimedia file; and in response to the playback segment belonging to the specific part of the multimedia file, it is determined not to provide the control right of the playback parameter to the user of the electronic device, and vice versa. The control right of the playback parameter is provided to the user of the electronic device.

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