WO2016145829A1

WO2016145829A1 - Media file playback control method, device and storage medium

Info

Publication number: WO2016145829A1
Application number: PCT/CN2015/091731
Authority: WO
Inventors: 张磊
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-09-21
Filing date: 2015-10-12
Publication date: 2016-09-22
Also published as: CN106547768B; CN106547768A

Abstract

A media file playback control method and device. The method comprises: acquiring, according to playback count change information of each of media files in a current count period, a playback state transition probability of each of the media files (S110); estimating, according to a playback state of each of the media files and the playback state transition probability of each of the media files in the current count period, a playback state probability of each of the media files in a next count period (S120); acquiring, according to the playback state probability of each of the media files in the next count period, a playback state expected value of each of the media files (S130); and in the next count period, performing playback control of all of the media files in sequence according to the sizes of the playback state expected values thereof (S140).

Description

Method, device and storage medium for playing and controlling media files

Technical field

The present invention relates to a media playing technology, and in particular, to a media file playing control method, apparatus, and storage medium.

Background technique

Almost everyone has access to digital media files such as music and video. User access to media files includes local access and online access; for music files, for example, local access is to store music files locally to the media terminal, by creating a playlist, and adding the music you wish to access in the list, then following the preset The playing sequence is played; the online access is to obtain music resources through the Internet, and sort according to the attributes of music files such as singers, lists, radio stations, etc., and then play according to the preset playing order.

For music in a locally accessed music playlist, the user may have some songs that I don't want to listen to for a long time, and the user needs to manually switch the songs, or move some songs out of the playlist, and re-add the favorite songs to the playlist; The playlists of the accessed music are generally defined by the song provider. The user can only add the songs that he likes to the list to the favorite list, so that the songs that are not liked can be played for a long time. Switch or remove manually. The user's operation process is cumbersome.

At present, in order to solve the problem of cumbersome user operations, it is usually only based on the number of times the music is played, and the songs that exceed the preset number of times of play are added to the favorites. This filtering mechanism is fixed and rigid, and has not been based on the user. The playing habits are to perceive the user's preference for the songs in the playlist, and also do not perceive the user's preference for the songs and intelligently sort and play the music files in the playlist according to the user's playing habits.

Summary of the invention

In order to solve the above technical problem, the embodiment of the present invention is to provide a method, a device, and a storage medium for playing a media file, which can sense the user's preference for the media file and the playing habits, and perform playback control according to the user's desire.

The technical solution of the present invention is implemented as follows:

The embodiment of the invention provides a method for controlling playback of a media file, including:

Obtaining a playback state transition probability of each media file according to the change information of the playing times of each media file in the current statistical period;

Estimating a play state probability of each media file in a next statistical period according to a play status of each media file in the current statistical period and a play state transition probability of each media file;

Obtaining a play status expected value of each media file according to a play state probability of each media file in the next statistical period;

In the next statistical period, all media files are played and controlled in order of the expected value of the playback state.

In the above solution, the playing state of the media file is a playing state space of the media file represented by a ratio of the number of times the media file is played to the total number of times the media files are played.

In the above solution, the playing state of the media file includes three playing state spaces;

Correspondingly, the playback state transition probability of each media file is obtained according to the change information of the playing times of each media file in the current statistical period, including:

One-step transfer matrix shown in Equation 1

Indicates the playback state transition probability of the media file k:

among them,

Fre _k (s) is the number of times the song k is played in the current statistical period s, ΔFre _k is the change information of the number of times of play, and thd _k,1 , thd _k,2 , thd _k,3 are the gates of the three play state spaces _, respectively. Limit.

In the foregoing solution, the playing state probability of each media file in the next statistical period is estimated according to the playing state of each media file in the current statistical period and the playing state transition probability of each media file, which specifically includes:

The playback state probability of the media file k at the time of the next statistical period s+1 is:

Where P _k (s)=[p _k,1 (s), p _k,2 (s), p _k,3 (s)] to represent the playing state of the media file k at the current statistical period s, p _{k, 1} (s), p _{k, 2} (s), p _{k, 3} (s) are the probabilities that the media file k is in the first, second, and third playing states at the current statistical period s.

In the above solution, the obtaining, according to the playing state probability of each media file in the next statistical period, the playing state expected value of each media file, including:

According to the playing state expectation value E _k (s) of each media file in the current statistical period and the playing state probability P _k (s+1)=[p _k,1 (s+) of each media file in the next statistical period 1), p _k,2 (s+1), p _k,3 (s+1)] obtain the playback state expectation value E _k (s+1) of each media file according to Equation 2:

Among them, E[●] means to obtain the expected value of ●.

In the foregoing solution, in the next statistical period, all the media files are played and controlled according to the order of the expected values of the play status, including:

According to the expected value of the playback state, all media files are in the next statistical period. Sort the playback order;

Alternatively, the media file whose expected state of the continuous preset statistical period is less than the preset expected threshold is not played in the next statistical period.

The embodiment of the present invention further provides a playback control device for a media file, including: a first acquiring unit, an estimating unit, a second acquiring unit, and a playing control unit, where

The first acquiring unit is configured to acquire a play state transition probability of each media file according to the play times change information of each media file in the current statistical period;

The estimating unit is configured to estimate a playing state probability of each media file in a next statistical period according to a playing state of each media file in the current statistical period and a play state transition probability of each media file;

The second obtaining unit is configured to acquire a play status expected value of each media file according to a play state probability of each media file in the next statistical period;

The play control unit is configured to perform play control on all media files in the order of the expected values of the play status in the next statistical period.

Correspondingly, the first acquiring unit is configured to pass the one-step transfer matrix shown in Equation 3.

Indicates the playback state transition probability of the media file k:

among them,

In the above solution, the estimating unit is configured to pass

To represent the playback state probability of the media file k at the time s+1 of the next statistical period, where P _k (s)=[p _k,1 (s),p _k,2 (s),p _k,3 (s) ] to indicate the playing state of the media file k at the current statistical period s, p _k,1 (s), p _k,2 (s), p _k,3 (s) are the current statistical period s, the media file k is in the first First, second, third play state probability.

In the foregoing solution, the second acquiring unit is specifically configured to:

According to the playing state expectation value E _k (s) of each media file in the current statistical period and the playing state probability P _k (s+1)=[p _k,1 (s+) of each media file in the next statistical period 1), p _k,2 (s+1), p _k,3 (s+1)] obtain the playback state expectation value E _k (s+1) of each media file according to Equation 4:

Among them, E[●] means to obtain the expected value of ●.

In the above solution, the play control unit is specifically configured as:

Sorting the play order of all media files in the next statistical period according to the expected value of the play state;

The embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a computer program, and the computer program is used to execute the above-mentioned media file playback control method according to an embodiment of the present invention.

An embodiment of the present invention provides a method, a device, and a storage medium for playing a media file, and predicting a playback state expected value of a next statistical period according to a preset probability model based on a playback state of the media file in a current statistical period, thereby The playback order of the media files in the next statistical period is sorted according to the predicted expected value, so that the user's preference for the media files and the playing habits can be predicted, and the playback control is performed according to the user's expectations.

DRAWINGS

FIG. 1 is a schematic flowchart of a method for controlling playback of a media file according to an embodiment of the present invention;

2 is a schematic diagram of a play state space according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a one-step transition probability according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a device for controlling playback of a media file according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings.

In the embodiment of the present invention, based on the preset playing state of the media file in the current statistical period, the expected value of the playing state of the next statistical period is predicted, so that the media file is played in the next statistical period according to the predicted expected value. Sorting sequentially, so that the user's preference for the media file and the playing habits can be predicted, and the playback control is performed according to the user's expectation.

Embodiment 1

Referring to FIG. 1 , a method for controlling playback of a media file according to an embodiment of the present invention is shown. It can be understood that the method can be applied to media because the access of the media file can be divided into local access and online access. Terminal devices for local playback of files, such as smartphones, tablets, laptops, personal digital assistants (PDAs), portable multimedia players (PMPs), etc.; can also be applied to online media file servers. This embodiment of the present invention does not specifically limit this. Moreover, the media file mentioned in the embodiment of the present invention may be a music file or a video file, and is not specifically limited herein; however, in order to clearly explain the technical solution of the embodiment of the present invention, the following is a music file. The technical solutions of the embodiments of the present invention are described by way of examples. The method as shown in 1 can include:

S110: Obtain each information according to the change of the playing times of each media file in the current statistical period. The playback state transition probability of media files;

The play status of the media file is a play status space of the media file, which is represented by a ratio of the number of times the media file is played to the total number of times of playing the media file. In this embodiment, the play status of the media file may include three Playback state space, specifically, set at s time, the number of playbacks of the media file k from the player added to the player Fre _k , the total number of times of playing all the media files is Fre _total , and the door of the three play state spaces is set The limits are respectively thd _k,1 =0.05*Fre _total , thd _k,2 =0.1*Fre _total ,thd _k,3 =Fre _total ; as shown in Figure 2, then, it can be known that when Fre _k ≤ thd _{k At 1} o'clock, the media file k is in the first playing state at the current statistical period s; when thd _k,1 <Fre _k ≤thd _k,2 , the media file k is in the second play at the s moment of the current statistical period. State; when thd _{k, 2} <Fre _k ≤ thd _{k, 3} , the media file k is in the third playing state at the current statistical period s.

It should be noted that, for each media file, the corresponding playing situation may include: playing the media file and skipping the media file; therefore, for the above two playing situations, setting when the total number of playing times of all the media files is n For the song k, the probability of playing it is set to p _l , and the probability of not playing is 1-p _l , then the probability P _k that the song k is played a _k times satisfies the binomial distribution as shown in Equation 1:

Similarly, for the song k, when the total number of times the media file is played is n, the probability that the user skips playing it by actively switching is q _l , and the probability of not skipping is 1-q _l , then the song k is skipped. The probability Q _k over b _k times also satisfies the binomial distribution as shown in Equation 2:

Then, those skilled in the art can know that when n is large and both p _l and q _l are very small, equations 1 and 2 respectively satisfy the approximate expressions of equations 3 and 4:

Where λ _l =np _l , μ _l =nq _l ,

Is the probability density function of the Poisson distribution.

Due to the Poisson distribution process and the steady increment process, the probability that the song k is increased by a _k times in t time is as shown in Equation 5:

Similarly, the probability that song k is reduced by b _k times in t time is as shown in Equation 6:

definition

For the song k from the current statistical period s time play state i to the next statistical period s+1 time play state j one-step transition probability:

As shown in FIG. 3, the one-step transition probability diagram may be combined with the play state of the foregoing media file to include three play state spaces, and the threshold values of the three play state spaces are respectively thd _k,1 , thd _{k, 2} , thd _{k 3} , it can be known that the number of times the song k is played at the current statistical period s is Fre _k (s), and the change information ΔFre _k according to the number of play times is used to indicate that the one-step transition probability shown in Equation 7 can be expressed by Equation 8. Show:

The change of the number of play times ΔFre _k can be determined by the number of play times in the current statistical period and the number of play times in the previous statistical period; however, the one-step transition probability shown in Equation 8 can be obtained by Equations 5 and 6, therefore, The one-step transition probability shown in Equation 8 is also a smooth increment process, and, due to the calculation process of Equation 8, considering that the number of times the song k is played is Fre _k (s) at the current statistical period s, the change information according to the number of times of play △ Fre _k , therefore, the one-step transition probability can more accurately characterize the information of the playback state of the song k.

It can be understood that the playback state transition probability of the media file k can be changed by the one-step transfer matrix shown in Equation 9.

Make a representation;

S120: Estimating a play state probability of each media file in a next statistical period according to a play status of each media file in the current statistical period and a play state transition probability of each media file;

It can be understood that the playing state of each media file in the current statistical period may be the expected playing state of each media file obtained in the previous statistical period; the constant value may also be set according to a preset setting rule. This embodiment of the present invention does not describe this.

Specifically, in the present embodiment _{, the} current statistical period s time media file k is represented by P _k (s)=[p _k,1 (s), p _k,2 (s), p _k,3 (s)]. The playing state, wherein the probability that the media file k is in the first, second, and third playing states is p _k,1 (s), p _k,2 (s), p _k,3 (s); The playback state probability of the media file k at the time of the next statistical period s+1 is:

S130. Obtain a play status expected value of each media file according to a play state probability of each media file in the next statistical period.

For example, the expected value of the playing state of each media file may be obtained by acquiring an expected value of the playing state probability of each media file in the next statistical period, which may be obtained according to Equation 10:

Therefore, it can be known that the play status expected value of each media file may be based on the play status expected value E _k (s) of each media file in the current statistical period and the play state probability of each media file in the next statistical period. Obtained by the formula 10, it can be understood that the formula 10 is an acquisition rule of the expected value of the playing state of each media file provided by the embodiment of the present invention, and those skilled in the art may pass the mathematical derivation according to other operation rules. The playing state probability of each media file in the next statistical period is the expected value of the playing state of each media file, which is not described in detail in the embodiment of the present invention.

S140: In the next statistical period, all media files are played and controlled according to the order of the expected values of the playing state.

It should be noted that the playback state expectation value of each media file obtained through the foregoing S110 to S130 can be used to represent the user's preference for each media file, and therefore, according to the user's preference for each media file. The playback of the media file is controlled. Specifically, the playback control of all the media files in the order of the expected value of the playback state may include:

Sort the playback order of all media files in the next statistical period according to the expected value of the playback state;

It can be understood that, in an actual application, the foregoing process of playing control on a media file may be implemented by operating a playlist including a media file identifier, for example, the media file identifier in the playlist may be in accordance with a play status expected value. Arrange the sizes so that the playback order of the media files in the next statistical period can be controlled, so that the media files that are played first in the next statistical period are the media files that the user most wants to play; for example, in the playlist, The expected values of the playback status in consecutive N statistical periods are less than the preset The media file identifier of the expected value threshold is deleted, so that the media files played in the next statistical period can be guaranteed to be media files that the user desires to play.

The embodiment provides a method for controlling playback of a media file. The prediction state of the playback state of the next statistical period is predicted according to the preset probability model based on the playback state of the media file in the current statistical period, so that the media is predicted according to the predicted expected value. The order of the files in the next statistical period is sorted, so that the user's preference for the media files and the playing habits can be predicted, and the playback control is performed according to the user's expectations.

Embodiment 2

Based on the same technical concept of the foregoing embodiment, referring to FIG. 4, a playback control device 40 for a media file according to an embodiment of the present invention is shown. The device can be applied to a terminal device for performing local playback of a media file, such as: Smartphones, tablets, laptops, personal digital assistants (PDAs), portable multimedia players (PMPs), etc.; can also be applied to online media file servers. The device 40 may include: a first obtaining unit 401, an estimating unit 402, a second obtaining unit 403, and a playing control unit 404, where

The first obtaining unit 401 is configured to acquire a play state transition probability of each media file according to the play times change information of each media file in the current statistical period;

The estimating unit 402 is configured to estimate a play state probability of each media file in a next statistical period according to a play status of each media file in the current statistical period and a play state transition probability of each media file;

The second obtaining unit 403 is configured to obtain a play status expected value of each media file according to a play state probability of each media file in the next statistical period;

The play control unit 404 is configured to perform play control on all media files in the order of the expected value of the play status in the next statistical period.

Correspondingly, the first obtaining unit 401 is configured to pass the one-step transfer matrix shown in Formula 11.

Indicates the playback state transition probability of the media file k:

among them,

In the foregoing solution, the estimating unit 402 may be specifically configured to:

by

In the foregoing solution, the second acquiring unit 403 is specifically configured to:

According to the playing state expectation value E _k (s) of each media file in the current statistical period and the playing state probability P _k (s+1)=[p _k,1 (s+) of each media file in the next statistical period 1), p _k,2 (s+1), p _k,3 (s+1)] obtain the playback state expectation value E _k (s+1) of each media file according to Equation 12:

Among them, E[●] means to obtain the expected value of ●.

In the above solution, the play control unit 404 is specifically configured to:

Or, the expected value of the playing state of the consecutive preset statistical periods is less than the preset expected value. Threshold media files are not played during the next statistical period.

The embodiment provides a playback control device 40 for media files, based on a preset probability model of the playback state of the media file in the current statistical period, predicting the expected value of the playback state of the next statistical period, so that the predicted value is predicted according to the predicted value. The playback order of the media files in the next statistical period is sorted, so that the user's preference for the media files and the playing habits can be predicted, and the playback control is performed according to the user's expectations.

The first acquiring unit, the estimating unit, the second obtaining unit, and the playing control unit in the playback control device of the media file proposed in the embodiment of the present invention may be implemented by a processor, and may also be implemented by a specific logic circuit. The processor may be a terminal device for locally playing media files, such as a smart phone, a tablet computer, a notebook computer, a PDA, a PMP, etc.; or a processor on an online media file server. In practical applications, the processor It can be a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA).

In the embodiment of the present invention, if the above-mentioned media file playback control method is implemented in the form of a software function module and sold or used as an independent product, it may also be stored in a computer readable storage medium. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Correspondingly, the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a computer program for performing the above-mentioned media file playback control method according to the embodiment of the present invention.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Industrial applicability

The playback control device of the media file obtains the playback state transition probability of each media file according to the change information of the playback times of each media file in the current statistical period; according to the playing state of each media file in the current statistical period and The playback state transition probability of each media file is used to estimate the playback state probability of each media file in the next statistical period; and the playback state of each media file is obtained according to the playback state probability of each media file in the next statistical period. Expected value; in the next statistical period, all media files are played and controlled in order of the expected value of the playback state. In this way, the prediction state of the playback state of the next statistical period can be predicted according to the preset probability model based on the playback state of the media file in the current statistical period, so that the playback order of the media file in the next statistical period is sorted according to the predicted expected value. Therefore, it is possible to predict the user's preference for the media file and the playing habits, and perform playback control according to the user's desire.

Claims

A method for controlling playback of a media file, the method comprising:

Obtaining a playback state transition probability of each media file according to the change information of the playing times of each media file in the current statistical period;

Estimating a play state probability of each media file in a next statistical period according to a play status of each media file in the current statistical period and a play state transition probability of each media file;

Obtaining a play status expected value of each media file according to a play state probability of each media file in the next statistical period;

In the next statistical period, all media files are played and controlled in order of the expected value of the playback state.
The method according to claim 1, wherein the playing state of the media file is a playing state space of the media file represented by a ratio of the number of times the media file is played to the total number of times the media files are played.
The method of claim 1, wherein the play status of the media file comprises three play status spaces;

Correspondingly, the playback state transition probability of each media file is obtained according to the change information of the playing times of each media file in the current statistical period, including:

One-step transfer matrix shown in Equation 1
Indicates the playback state transition probability of the media file k:

among them,
Fre k (s) is the number of times the song k is played in the current statistical period s, ΔFre k is the change information of the number of times of play, and thd k,1 , thd k,2 , thd k,3 are the gates of the three play state spaces , respectively. Limit.
The method according to claim 3, wherein the playing state of each media file in the next statistical period is estimated according to the playing state of each media file in the current statistical period and the playing state transition probability of each media file. Probability, including:

The playback state probability of the media file k at the time of the next statistical period s+1 is:

Where P k (s)=[p k,1 (s), p k,2 (s), p k,3 (s)] to represent the playing state of the media file k at the current statistical period s, p k, 1 (s), p k, 2 (s), p k, 3 (s) are the probabilities that the media file k is in the first, second, and third playing states at the current statistical period s.
The method according to claim 4, wherein the obtaining a play status expectation value of each media file according to a play state probability of each media file in the next statistical period includes:

According to the playing state expectation value E k (s) of each media file in the current statistical period and the playing state probability P k (s+1)=[p k,1 (s+) of each media file in the next statistical period 1), p k,2 (s+1), p k,3 (s+1)] obtain the playback state expectation value E k (s+1) of each media file according to Equation 2:

Among them, E[●] means to obtain the expected value of ●.
The method according to any one of claims 1 to 5, wherein, in the next statistical period, the playback control of all the media files is performed in the order of the expected values of the playback state, including:

Sorting the play order of all media files in the next statistical period according to the expected value of the play state;

Alternatively, the media file whose expected state of the continuous preset statistical period is less than the preset expected threshold is not played in the next statistical period.
A playback control device for a media file, the device comprising: a first acquisition unit, an estimation unit, a second acquisition unit, and a playback control unit, wherein

The first acquiring unit is configured to acquire a play state transition probability of each media file according to the play times change information of each media file in the current statistical period;

The estimating unit is configured to estimate a playing state probability of each media file in a next statistical period according to a playing state of each media file in the current statistical period and a play state transition probability of each media file;

The second obtaining unit is configured to acquire a play status expected value of each media file according to a play state probability of each media file in the next statistical period;

The play control unit is configured to perform play control on all media files in the order of the expected values of the play status in the next statistical period.
The apparatus according to claim 7, wherein the playing state of the media file comprises three playing state spaces;

Correspondingly, the first acquiring unit is configured to pass the one-step transfer matrix shown in Equation 3.
Indicates the playback state transition probability of the media file k:

among them,
Fre k (s) is the number of times the song k is played in the current statistical period s, ΔFre k is the change information of the number of times of play, and thd k,1 , thd k,2 , thd k,3 are the gates of the three play state spaces , respectively. Limit.
The apparatus of claim 8, wherein the estimating unit is configured to pass
To represent the playback state probability of the media file k at the time s+1 of the next statistical period, where P k (s)=[p k,1 (s),p k,2 (s),p k,3 (s) ] to indicate the playing state of the media file k at the current statistical period s, p k,1 (s), p k,2 (s), p k,3 (s) are the current statistical period s, the media file k is in the first First, second, third play state probability.
The device according to claim 9, wherein the second obtaining unit is configured to:

According to the playing state expectation value E k (s) of each media file in the current statistical period and the playing state probability P k (s+1)=[p k,1 (s+) of each media file in the next statistical period 1), p k,2 (s+1), p k,3 (s+1)] obtain the playback state expectation value E k (s+1) of each media file according to Equation 4:

Among them, E[●] means to obtain the expected value of ●.
The device according to any one of claims 7 to 10, wherein the playback control unit is configured to:

Sorting the play order of all media files in the next statistical period according to the expected value of the play state;

Alternatively, the media file whose expected state of the continuous preset statistical period is less than the preset expected threshold is not played in the next statistical period.