CN109413443A - A kind of implementation method and device of time-shifting function - Google Patents
A kind of implementation method and device of time-shifting function Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/23418—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2387—Stream processing in response to a playback request from an end-user, e.g. for trick-play
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
- H04N21/26233—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints involving content or additional data duration or size, e.g. length of a movie, size of an executable file
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47217—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for controlling playback functions for recorded or on-demand content, e.g. using progress bars, mode or play-point indicators or bookmarks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/65—Transmission of management data between client and server
- H04N21/658—Transmission by the client directed to the server
- H04N21/6587—Control parameters, e.g. trick play commands, viewpoint selection
Abstract
The present invention relates to multimedia technologies, the implementation method and device of a kind of time-shifting function are provided, to improve the accuracy of the video content searched by time-shifted mode.This method are as follows: network server is directed to before time shift source location set, include N number of original slice file including time shift source location set, it is sliced with re-starting fining according to specified target duration, and several target slice files of acquisition are sent to time shift terminal, and time shift terminal can carry out time shift operation according to preset step-length in several target slice files, the time shift state pause judgments point until reaching user's instruction.Due to compared to original slice file, the duration of target slice file is shorter, therefore, time shift terminal is when carrying out time shift operation, positioning can be easier to time shift state pause judgments point specified by user, and then the accuracy for the video content that time shift terminal is searched by time-shifted mode can be effectively improved, avoid occurring video content chattering during time shift.
Description
Technical field
The present invention relates to multimedia technology, in particular to the implementation method and device of a kind of time-shifting function.
Background technique
With the development of technology, time-moving television (TSoC) is gradually popularized.So-called time-moving television refers to that spectators are watching
It, can be at any time by pause or retrogressing/fast forward button, thus the program point for selecting itself to need to watch when digital television program.
For example, user is in the video content of viewing live streaming, if missing the played view in part because of interim outgoing
Frequency content, then user can press " retrogressing " key enter time-shifted mode viewing played video content (usually 2 hours it
It is interior), after viewing, user can press " exiting " key and exit time-shifted mode.
Under normal conditions, the live streaming of video content can be realized by multicast mode and mode of unicast.
So-called multicast mode refers to using Internet igmpinternet (Internet Group Management
Protocol) IGMP protocol realization.Playback terminal only needs to be added the video content that multicast group is obtained with live streaming.
So-called mode of unicast refers to using HTTP live stream (HTTP Live Streaming, HLS) protocol realization.Live streaming
Video content can be cut into multiple fragments, the multiple fragments of terminal downloads simultaneously play.
After the video content for providing a user live streaming, it is also necessary to provide a user time shift and look back function, wherein time shift function
It can be realized by HLS protocol, HLS is the mainstream technology used at this stage.
Under prior art, time-shifting function is realized using HLS protocol, video file is mainly subjected to slice and obtains several cut
Piece file is enabled terminal downloads slice file and played, is usually sliced as unit of 10 seconds.So, when user indicates to straight
When the video content broadcast carries out time shift operation, the location point or wish the location point retreated to fastly that terminal is suspended, when may not be
The starting point of slice file where video content after shifting therefore, will when the slice file moved to when terminal plays are current
The location point for occurring playing is not the location point that user wishes viewing, and then is possible to splashette phenomenon occur.
Obviously, under prior art, terminal can not accurately provide its position for wishing to watch to user under time-shifted mode
The video content of point.
Summary of the invention
The embodiment of the present invention provides the implementation method and device of a kind of time-shifting function, is searched for improve by time-shifted mode
The accuracy of the video content arrived.
Specific technical solution provided in an embodiment of the present invention is as follows:
First aspect, a kind of implementation method of time-shifting function, comprising:
The time shift source location set that user's instruction is determined based on the notice of time shift terminal, obtains the time shift source location set
Before, comprising N number of original slice file including the time shift source location set, wherein N is parameter preset, the slice
File is the file obtained after being sliced according to system default duration to video content；
Slice is re-started according to N number of original slice file of the specified target duration to acquisition, several targets is obtained and cuts
Piece file, wherein the target duration is less than the system default duration；
Several target slice files are sent to the time shift terminal, trigger the time shift terminal according to preset step-length
Time shift operation is carried out in several target slice files, the time shift state pause judgments point until reaching user's instruction.
Optionally, slice is re-started according to N number of original slice file of the specified target duration to acquisition, obtained several
Target slice file, comprising:
N number of original slice file is divided into several file groups, respectively for each file group using corresponding
Target duration re-starts slice, wherein the corresponding target duration of a file group and one file group and time shift originate
Distance is positively correlated between location point.
Optionally, several target slice files are sent to the time shift terminal, comprising:
It determines the total duration Tn of all target slice files, determine the total duration Tc for generating target slice file needs, with
And determine the duration of the generation Ts of time shift operation；
If Ts > Tn+Tc, whole target slice files is sent to time shift terminal；
If Ts≤Tn+Tc, it is determined that when user indicates time shift end position point, stopped based on the time shift end position point
Only target slice file is sent to time shift terminal.
Optionally, further comprise:
The pause source location set of user's instruction is determined based on the notice of time shift terminal；
Judge in generated original slice file, if exist using the time-out position point as the original slice of starting point
File, if so, otherwise then directly acquiring the original slice file as pause slice file is based on the time-out position point
It determines starting point, slice is re-started to the video content after the starting point, obtain pause slice file；
The pause slice file of acquisition is sent to time shift terminal, triggering time shift terminal is when user indicates to terminate pause, base
Start to play video content in pause slice file.
Optionally, starting point is determined based on the time-out position point, comprising:
Using N seconds before time-out position point location points as starting point, wherein N >=0.
Second aspect, a kind of implementation method of time-shifting function, comprising:
Network server, triggering network server is notified to execute following operation the time shift source location set of user's instruction:
Before obtaining the time shift source location set, comprising N number of original slice file including the time shift source location set, according to
Specified target duration re-starts slice to N number of original slice file of acquisition, obtains several target slice files, wherein N
For parameter preset, the slice file is the file obtained after being sliced according to system default duration to video content, described
Target duration is less than the system default duration；
Several target slice files that network server issues are received, and according to preset step-length in several targets
Time shift operation is carried out in slice file, the time shift state pause judgments point until reaching user's instruction.
Optionally, several target slice files that network server issues are received, comprising:
It determines the total duration Tn of all target slice files, determine the total duration Tc for generating target slice file needs, with
And determine the duration of the generation Ts of time shift operation；
If Ts > Tn+Tc, whole target slice files is downloaded；
If Ts≤Tn+Tc, it is determined that when user indicates time shift end position point, being downloaded to includes that the time shift terminates
When the target slice file of location point, stop downloading.
Optionally, time shift operation is carried out in several target slice files according to preset step-length, comprising:
Since the time shift source location set forward, respectively according to each target slice file and time shift initial position
The distance between point, using corresponding time shift frequency, carries out time shift operation in corresponding target slice file.
Optionally, further comprise:
Network server, triggering network server is notified to execute following operation the time shift source location set of user's instruction:
Based on the pause source location set, judge in generated original slice file, if exist and be with the time-out position point
The original slice file of starting point, if so, then directly acquiring the original slice file as pause slice file, otherwise, base
Starting point is determined in the time-out position point, slice is re-started to the video content after the starting point, is obtained pause and is cut
Piece file；
The pause slice file that network server issues is received to cut when user indicates to terminate pause based on the pause
Piece file starts to play video content.
The third aspect, a kind of realization device of time-shifting function, comprising:
Acquiring unit determines the time shift source location set of user's instruction for the notice based on time shift terminal, described in acquisition
Before time shift source location set, include N number of original slice file including the time shift source location set, wherein N is default
Parameter, the slice file is the file obtained after being sliced according to system default duration to video content；
Processing unit is obtained for re-starting slice according to N number of original slice file of the specified target duration to acquisition
Obtain several target slice files, wherein the target duration is less than the system default duration；
It is whole to trigger the time shift for several target slice files to be sent to the time shift terminal for communication unit
End carries out time shift operation in several target slice files according to preset step-length, the time shift starting until reaching user's instruction
End point.
Optionally, slice is re-started according to N number of original slice file of the specified target duration to acquisition, obtained several
When target slice file, the processing unit is used for:
N number of original slice file is divided into several file groups, respectively for each file group using corresponding
Target duration re-starts slice, wherein the corresponding target duration of a file group and one file group and time shift originate
Distance is positively correlated between location point.
Optionally, when several target slice files being sent to the time shift terminal, the communication unit is used for:
It determines the total duration Tn of all target slice files, determine the total duration Tc for generating target slice file needs, with
And determine the duration of the generation Ts of time shift operation；
If Ts > Tn+Tc, whole target slice files is sent to time shift terminal；
If Ts≤Tn+Tc, it is determined that when user indicates time shift end position point, stopped based on the time shift end position point
Only target slice file is sent to time shift terminal.
Optionally, the processing unit is further used for:
The pause source location set of user's instruction is determined based on the notice of time shift terminal；
Judge in generated original slice file, if exist using the time-out position point as the original slice of starting point
File, if so, otherwise then directly acquiring the original slice file as pause slice file is based on the time-out position point
It determines starting point, slice is re-started to the video content after the starting point, obtain pause slice file；
The communication unit is further used for:
The pause slice file of acquisition is sent to time shift terminal, triggering time shift terminal is when user indicates to terminate pause, base
Start to play video content in pause slice file.
Optionally, when determining starting point based on the time-out position point, the processing unit is used for:
Using N seconds before time-out position point location points as starting point, wherein N >=0.
Fourth aspect, a kind of realization device of time-shifting function, comprising:
Communication unit, the time shift source location set for indicating user notify network server, trigger network server
Execute following operation: before obtaining the time shift source location set, comprising N number of original including the time shift source location set
It is sliced file, slice is re-started according to N number of original slice file of the specified target duration to acquisition, obtains several targets and cut
Piece file, wherein N is parameter preset, and the slice file is to obtain after being sliced according to system default duration to video content
The file obtained, the target duration are less than the system default duration；
Time shift unit, several target slice files issued for receiving network server, and according to preset step-length
Time shift operation is carried out in several target slice files, the time shift state pause judgments point until reaching user's instruction.
Optionally, when receiving several target slice files that network server issues, the communication unit is used for:
It determines the total duration Tn of all target slice files, determine the total duration Tc for generating target slice file needs, with
And determine the duration of the generation Ts of time shift operation；
If Ts > Tn+Tc, whole target slice files is downloaded；
If Ts≤Tn+Tc, it is determined that when user indicates time shift end position point, being downloaded to includes that the time shift terminates
When the target slice file of location point, stop downloading.
Optionally, when time shift operation is carried out in several target slice files according to preset step-length, the time shift list
Member is used for:
Since the time shift source location set forward, respectively according to each target slice file and time shift initial position
The distance between point, using corresponding time shift frequency, carries out time shift operation in corresponding target slice file.
Optionally, the communication unit is further used for:
Network server, triggering network server is notified to execute following operation the time shift source location set of user's instruction:
Based on the pause source location set, judge in generated original slice file, if exist and be with the time-out position point
The original slice file of starting point, if so, then directly acquiring the original slice file as pause slice file, otherwise, base
Starting point is determined in the time-out position point, slice is re-started to the video content after the starting point, is obtained pause and is cut
Piece file；
The time shift unit is further used for:
The pause slice file that network server issues is received to cut when user indicates to terminate pause based on the pause
Piece file starts to play video content.
5th aspect, a kind of calculating equipment comprising memory and processor, wherein the memory is for storing journey
Sequence instruction, the processor execute for calling the program instruction stored in the memory, according to the program instruction of acquisition
Method described in any one of one side.
6th aspect, the computer-readable recording medium storage have computer executable instructions, and the computer can be held
Row instruction is for making the computer execute method described in any one of first aspect.
7th aspect, a kind of calculating equipment comprising memory and processor, wherein the memory is for storing journey
Sequence instruction, the processor execute for calling the program instruction stored in the memory, according to the program instruction of acquisition
Method described in any one of two aspects.
Eighth aspect, a kind of computer storage medium, the computer-readable recording medium storage have computer executable
Instruction, the computer executable instructions are used to that the computer to be made to execute method described in any one of second aspect.
It include time shift initial position before network server can obtain time shift source location set in the embodiment of the present invention
N number of original slice file including point, and essence is re-started according to N number of original slice file of the specified target duration to acquisition
Refinement ground slice, and several target slice files of acquisition are sent to time shift terminal, and time shift terminal can be according to default step
It grows and carries out time shift operation in several target slice files, the time shift state pause judgments point until reaching user's instruction.Due to comparing
Shorter in the duration of original slice file, target slice file, therefore, time shift terminal can be easier when carrying out time shift operation
It positions to time shift state pause judgments point specified by user, and then can effectively improve what time shift terminal was searched by time-shifted mode
The accuracy of video content avoids occurring video content chattering during time shift.
Detailed description of the invention
Fig. 1 is the flow diagram for searching for video content in the embodiment of the present invention by time-shifting function；
Fig. 2 is web server function structural schematic diagram in the embodiment of the present invention；
Fig. 3 is time shift terminal structure schematic diagram in the embodiment of the present invention.
Specific embodiment
In order to improve the accuracy of the video content searched by time-shifted mode, in the embodiment of the present invention, refer to from user
The time shift source location set shown starts, and is sliced again to the video content that played, and it is more fine to obtain chronomere
Slice file regarded accordingly according to the time shift end position point search that user indicates and in the slice file repartitioned
Frequency content.
Further description is made to the preferred embodiment of the present invention with reference to the accompanying drawing.
Currently, when user moves terminal when in use (e.g., can be the TV with time-shifting function, be also possible to when
The set-top box of shifting function), in the video content of viewing live streaming, direct broadcast band can be entered and watched, at this point, time shift terminal can lead to
It crosses IGMP multicast mode or HLS mode of unicast and provides the video content of live streaming for user.
When realizing live streaming using IGMP multicast mode, need time shift terminal that multicast elder sister is added, in this way, network server just meeting
By the video resource unified payment of live streaming into live streaming group, for time shift terminal plays.
And when HLS mode of unicast being used to realize live streaming, time shift terminal needs to download slice file from network server, passes through
It is sliced file and provides the video content of live streaming for user.
When user indicates that time shift terminal switches to time-shifted mode from live-mode, if being provided before using IGMP multicast mode
The video content of live streaming, then time shift terminal exits live streaming group, and specified from the nearest network server downloading user of route distance
The corresponding slice file of time shift start time point, be prepared as user provide time shift video content；And if mono- using HLS before
Broadcast mode provides the video content of live streaming, then after entering time-shifted mode, user can generally retreat viewing and not see clearly time shift terminal
Or want the video content for repeating to watch, and the duration between time shift end position point and time shift source location set generally will not be too
Long, therefore, optionally, time shift terminal is up to the video content for the time shift that user is provided in M hours (e.g., 2 hours).
In the embodiment of the present invention, time shift source location set and time end position point are not finger objective time, and are referred to
User indicates to start the play position of video content and user when time-shifted mode and indicates to terminate video content when time-shifted mode
Play position.
As shown in fig.1, time shift terminal realizes that the detailed process of time-shifting function is as follows in the embodiment of the present invention:
Step 100: time shift terminal indicates to open time-shifted mode according to user, and determines the time shift initial position that user specifies
Point, and time shift source location set is reported into network server.
Specifically, time shift terminal will enter time-shifted mode, and record current live streaming when user initiates time shift operation
Video content location point, as time shift source location set.
In the embodiment of the present invention, in order to improve time shift efficiency, what network server generallyd use is in network edge
Server, i.e., it is subsequent to will not be described in great detail with the closer server of time shift terminal route distance, also referred to as Edge Server.
Step 101: including above-mentioned time shift source location set before network server obtains above-mentioned time shift source location set
N number of original slice file inside.
So-called slice file generally comprises two parts content, and a part is index file, and a part is video file, rope
Quotation part can be considered as the catalogue of video file, typically at least have recorded the title for the video file for including in slice file, and
The partial video content in the video content being entirely broadcast live then is had recorded in video file.And original slice file, that is, refer to by
The file that lighting system default duration (usually 10s) obtains after being sliced to the video content of live streaming.
Optionally, N=10, i.e. network server are obtained comprising being based on time shift start bit including time shift source location set
10 original slice files that video content before setting a little generates, i.e., 100 seconds original slice files.
Step 102: network server re-starts slice according to N number of slice file of the specified target duration to acquisition,
Obtain several target slice files, wherein target duration is less than system default duration.
N number of original slice file is divided into several file groups, uses corresponding target for each file group respectively
Duration re-starts slice, wherein the corresponding target duration of a file group and a file group and time shift source location set
Between distance be positively correlated, i.e., file group is closer at a distance from time shift source location set, and corresponding target duration is shorter.
For example, it is assumed that N=10, is divided into two groups, one group includes 5 original slice files, will be with time shift initial position
Close one group of point time gap is known as N1, will be adjacent with N1 and be known as with time shift source location set distance relatively far away from one group
N2。
So, for N1, network server according to less than or equal to 2 seconds first object duration (be only for example herein,
Can be 1 second or smaller) slice is re-started to N2, the new target slice file in 5 × (10/2)=25 is generated, and be directed to
N2, network server then according to the second target duration (being only for example) for being greater than 2 seconds and being less than or equal to 5 seconds, are sliced into 5 again
× (10/5)=10 or more new target slice files, after being sliced result again, network server can be to time shift end
End issues all newest target slice files.
Step 103: several target slice files are sent to time shift terminal by network server.
Step 104: time shift terminal carries out time shift operation in several target slice files of acquisition according to preset step-length, directly
To the time shift state pause judgments point for reaching user's instruction.
Specifically, time shift terminal when receiving target slice file, needs the time shift based on user to wait delay requirement, ginseng
The time shift end position point that user specifies is examined, determines the download of target slice file.
In the embodiment of the present invention, time shift terminal can be set and at least download M target slice file, optionally, M=35.
I.e. since time shift source location set, 35 or more target slice files are at least downloaded, that is, comprising adopting in above-mentioned N1
Re-start within 2 seconds the target slice file of slice with time interval, and comprising in above-mentioned N2, again using time interval 5 seconds
The target slice file being sliced.
Assuming that the time of one target slice file of downloading is T1, the bandwidth rates of network where T1=time shift terminal/(point
The corresponding target duration × code rate of piece).So, the total duration of 35 target slice files is downloaded are as follows: T35=35 × T1.
Assuming that the total duration for downloading all target slice files is Tn, generating the total duration that target slice file needs is
Tc, then, time shift terminal can first determine the duration Ts of generation of time shift operation, and Ts, Tn and Tc are compared.
If Ts > Tn+Tc, downloads whole target slice files and watched for user's time shift.
Certainly, if the target slice file of downloading whole, it is also necessary to consider buffer size, need holding in buffer area
By downloading in range, details are not described herein.
After the complete whole target slice file of time shift terminal downloads, if time shift operation is still continuing, time shift is not both reached also
End position point (is likely to be user still to indicate, it is also possible to be the also period of the day from 1 p.m. to 3 p.m. to move on to position), then it is former to will continue to downloading for time shift terminal
Begin slice file (being sliced as unit of 10 seconds), to continue time shift operation.
If Ts≤Tn+Tc, when user indicates time shift end position point, time shift terminal is based on the time shift end position
Point stops downloading target slice file.
In this manner it is ensured that time shift end position point is located in target slice file, so as to enable user obtain more
Accurately content is watched in time shift.
Further, it is assumed that the time shift end position point of user's instruction has exceeded the range of target slice file, then time shift
Terminal can still continue to provide the Ts file of original slice file (being sliced as unit of 10 seconds) to time shift terminal to use
Family provides time-shifted contents and is watched.
In the embodiment of the present invention, due to that can be directed to about before time shift source location set 100 seconds (10 seconds × 10)
Original slice file in duration is sliced again, therefore, according to the use habit of general user, user generally require from when
It moves and is accurately positioned time shift end position point in forward 1-2 minutes of source location set, and content further along is according to original slice
The granularity of file carries out time shift, can satisfy demand.
Certainly, in step 104, the operation that Ts, Tn and Tc are compared can also be completed by network server, and is based on
Comparison result determines which kind of mode to send target slice file to time shift terminal using, optional:
If Ts > Tn+Tc, whole target slice files is sent to time shift terminal by network server.
Certainly, if time shift operation does not stop yet after having sent target slice file, then will continue to will be original for network server
Slice file is sent to time shift terminal, and details are not described herein.
Correspondingly, time shift terminal can also download whole target slice files when determining Ts > Tn+Tc.
If Ts≤Tn+Tc, when network server determines that user indicates time shift end position point, terminated based on the time shift
Location point stops sending target slice file to time shift terminal.
Correspondingly, time shift terminal can also when determining Ts≤Tn+Tc, based on user instruction time shift end position point,
Be downloaded to include the target slice file of the time shift end position point when, stop downloading.
Certainly, if the time shift end position point of user's instruction has exceeded the range of target slice file, network server
Also it will continue to original slice file being sent to time shift terminal, also repeat no more herein.
Further, in the embodiment of the present invention, time shift terminal since time shift source location set forward, respectively according to time shift
The distance between current location point and time shift source location set are carried out in target slice file using corresponding time shift frequency
Time shift operation.
So-called time shift operation, in the embodiment of the present invention, that is, the key frame of video being to look in target slice file is (following
Referred to as I frame).Since time shift terminal time shift source location set in target slice file find apart from time shift source location set
Then nearest I frame is at the uniform velocity retreated since this I frame using the frequency of gradual change, e.g., can be according to 1 second, 2 seconds, 2.5 seconds, 5 seconds
Deng time shift frequency targets slice file in carry out the lookup of I frame.
For example, it is assumed that time shift current location point is denoted as Tshifte, and time shift source location set is denoted as Tshiftb, then
Time shift terminal can be adjusted in target slice file, since time shift source location set based on Td=Tshifte-Tshiftb
Time shift frequency.
Such as, if Td=Tshifte-Tshiftb < 1 minute, time shift terminal can carry out I frame according to 1 second time shift frequency
It searches.
For another example, if 1 minute < Td=Tshifte-Tshiftb < 5 minute, time shift terminal can be according to 2 seconds or 2.5 seconds
Time shift frequency carry out the lookup of I frame.
For another example, if Td > 5 minute, time shift terminal can carry out the lookup of I frame according to 5 seconds time shift frequencies.
It needs to show to user once having found I frame, so that user judges whether to need to stop based on the I frame of display
Time shift operation.
Based on the above embodiment, further, in the embodiment of the present invention, time shift terminal is in addition to can be from time shift initial position
Start to provide time shift operation forward, time shift backward can also be provided after user indicates that pause plays video content for user
Operation.
In practical application, when watching programme televised live, because certain reason is away from keyboard a little while, user wishes to return user
When can continue to watch from time-out position point, content jump, not occur in when broadcasting.
Under normal conditions, above-mentioned function can be realized by multicast mode and is broadcast live, after multicast group is added in time shift terminal, so that it may
To receive the video flowing of live streaming.When user indicates that time shift terminal suspends the video content being currently played, time shift terminal starts
Into when shifting state, specifically, time shift terminal can start download original slice file.Wherein, due to time shift terminal downloads
Original slice file is that network server advanced processing is good, and therefore, the time is located at before pause point, then, time shift terminal
After the original slice file for finding downloading by time-out position point, the not necessarily above-mentioned pause position of the starting point of original slice file
It sets a little, then, when user indicates to terminate back pause, time shift terminal continues to play video content, just will appear video content jump
Jump phenomenon.
In order to overcome drawbacks described above, in the embodiment of the present invention, handled in the following ways:
Firstly, time shift terminal determines the time-out position point of user's instruction, and the time-out position point is reported into network service
Device.
Secondly, generated original slice can be searched after network server obtains the time-out position point that time shift terminal reports
In file, if exist using above-mentioned time-out position point as the original slice file of starting point, original cut if so, then directly acquiring this
Otherwise piece file determines starting point based on above-mentioned time-out position point, in the video after starting point as pause slice file
Appearance is sliced again, obtains pause slice file.
In practical application, if the duration Tp of user's pause is very of short duration, such as Tp < 5s, then network server possibly can not and
When complete video content slice again and issue, then, in order to guarantee network server have time enough complete it is above-mentioned
Operation, optionally, network server can using N seconds before time-out position point location points as starting point, start to starting point it
Video content afterwards is sliced again, wherein N >=0 (that is, when determining that user can suspend some time, then also can use N=
0, i.e., directly using time-out position point as starting point).
Finally, the pause of acquisition can be sliced file by network server is sent to time shift terminal.
Time shift terminal receives the pause slice file that network server issues, when user indicates to stop pause,
Since time-out position point, smoothly to continue to play video content.
In above-described embodiment, optionally, time shift terminal realizes the live streaming of video content, and network server with multicast mode
When being broadcast live to video content, (e.g., the slice duration used is less than the system default duration of original slice file use
10 seconds), optionally, above-mentioned slice duration can use 5 seconds or 3 seconds, operate in this way, shifting state when user carries out from live state
When, content chattering is unobvious.
On the other hand, in the embodiment of the present invention, slice service ability is sunk into edge service node, i.e., above-mentioned network clothes
Device be engaged in as in network side edge, nearest service node, such network server can be quick with time shift terminal route distance
The request for responding time shift terminal, provides relevant target slice file, in time so that time shift terminal quickly and accurately completes time shift
Operation.
Based on the above embodiment, as shown in fig.2, in an embodiment of the invention, network server is included at least and obtained
Take unit 20, processing unit 21 and communication unit 22, wherein
Acquiring unit 20 determines the time shift source location set of user's instruction for the notice based on time shift terminal, obtains institute
Before stating time shift source location set, include N number of original slice file including the time shift source location set, wherein N is pre-
Setting parameter, the slice file is the file obtained after being sliced according to system default duration to video content；
Processing unit 21, for re-starting slice according to N number of original slice file of the specified target duration to acquisition,
Obtain several target slice files, wherein the target duration is less than the system default duration；
Communication unit 22 triggers the time shift for several target slice files to be sent to the time shift terminal
Terminal carries out time shift operation in several target slice files according to preset step-length, and the time shift until reaching user's instruction rises
Beginning end point.
Optionally, slice is re-started according to N number of original slice file of the specified target duration to acquisition, obtained several
When target slice file, processing unit 21 is used for:
N number of original slice file is divided into several file groups, respectively for each file group using corresponding
Target duration re-starts slice, wherein the corresponding target duration of a file group and one file group and time shift originate
Distance is positively correlated between location point.
Optionally, when several target slice files being sent to the time shift terminal, communication unit 22 is used for:
It determines the total duration Tn of all target slice files, determine the total duration Tc for generating target slice file needs, with
And determine the duration of the generation Ts of time shift operation；
If Ts > Tn+Tc, whole target slice files is sent to time shift terminal；
If Ts≤Tn+Tc, it is determined that when user indicates time shift end position point, stopped based on the time shift end position point
Only target slice file is sent to time shift terminal.
Optionally, processing unit 21 is further used for:
The pause source location set of user's instruction is determined based on the notice of time shift terminal；
Judge in generated original slice file, if exist using the time-out position point as the original slice of starting point
File, if so, otherwise then directly acquiring the original slice file as pause slice file is based on the time-out position point
It determines starting point, slice is re-started to the video content after the starting point, obtain pause slice file；
Communication unit 22 is further used for:
The pause slice file of acquisition is sent to time shift terminal, triggering time shift terminal is when user indicates to terminate pause, base
Start to play video content in pause slice file.
Optionally, when determining starting point based on the time-out position point, processing unit 21 is used for:
Using N seconds before time-out position point location points as starting point, wherein N >=0.
Based on the above embodiment, as shown in fig.3, in an embodiment of the invention, time shift terminal includes at least communication
Unit 30 and time shift unit 31, wherein
Communication unit 30, the time shift source location set for indicating user notify network server, trigger network service
Device executes following operation: before obtaining the time shift source location set, including N number of original including the time shift source location set
Begin slice file, re-starts slice according to N number of original slice file of the specified target duration to acquisition, obtains several targets
It is sliced file, wherein N is parameter preset, and the slice file is after being sliced according to system default duration to video content
The file of acquisition, the target duration are less than the system default duration；
Time shift unit 31, several target slice files issued for receiving network server, and according to default step
It grows and carries out time shift operation in several target slice files, the time shift state pause judgments point until reaching user's instruction.
Optionally, when receiving several target slice files that network server issues, communication unit 30 is used for:
It determines the total duration Tn of all target slice files, determine the total duration Tc for generating target slice file needs, with
And determine the duration of the generation Ts of time shift operation；
If Ts > Tn+Tc, whole target slice files is downloaded；
If Ts≤Tn+Tc, it is determined that when user indicates time shift end position point, being downloaded to includes that the time shift terminates
When the target slice file of location point, stop downloading.
Optionally, when time shift operation is carried out in several target slice files according to preset step-length, time shift unit 31
For:
Since the time shift source location set forward, respectively according to each target slice file and time shift initial position
The distance between point, using corresponding time shift frequency, carries out time shift operation in corresponding target slice file.
Optionally, communication unit 30 is further used for:
Network server, triggering network server is notified to execute following operation the time shift source location set of user's instruction:
Based on the pause source location set, judge in generated original slice file, if exist and be with the time-out position point
The original slice file of starting point, if so, then directly acquiring the original slice file as pause slice file, otherwise, base
Starting point is determined in the time-out position point, slice is re-started to the video content after the starting point, is obtained pause and is cut
Piece file；
Time shift unit 31 is further used for:
The pause slice file that network server issues is received to cut when user indicates to terminate pause based on the pause
Piece file starts to play video content.
In one embodiment of the invention, a kind of calculating equipment is provided comprising memory and processor, wherein described to deposit
Reservoir is for storing program instruction, and the processor is for calling the program instruction stored in the memory, according to acquisition
Program instruction executes any method that above-mentioned network server executes.
In one embodiment of the invention, a kind of computer readable storage medium, the computer readable storage medium are provided
Computer executable instructions are stored with, the computer executable instructions are for making the computer execute above-mentioned network server
Any method executed.
In one embodiment of the invention, a kind of calculating equipment is provided comprising memory and processor, wherein described to deposit
Reservoir is for storing program instruction, and the processor is for calling the program instruction stored in the memory, according to acquisition
Program instruction executes any method that above-mentioned time shift terminal executes.
In one embodiment of the invention, a kind of computer storage medium, the computer-readable recording medium storage are provided
There are computer executable instructions, the computer executable instructions are executed for making the computer execute above-mentioned network server
Any method.
In conclusion including time shift before network server can obtain time shift source location set in the embodiment of the present invention
N number of original slice file including source location set, and according to specified target duration to N number of original slice file weight of acquisition
Newly be sliced with refining, and several target slice files of acquisition are sent to time shift terminal, and time shift terminal can be by
Time shift operation is carried out in several target slice files according to preset step-length, the time shift state pause judgments point until reaching user's instruction.
Since compared to original slice file, the duration of target slice file is shorter, therefore, time shift terminal when carrying out time shift operation,
It can be easier to position to time shift state pause judgments point specified by user, and then time shift terminal can be effectively improved and pass through time-shifted mode
The accuracy of the video content searched avoids occurring video content chattering during time shift.
Further, when carrying out time shift operation, time shift terminal can also be adjusted according to the generation duration of time shift operation
Time shift frequency, so as to improve time shift search efficiency while meeting user's time-shift requirements.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention
The spirit and scope of bright embodiment.In this way, if these modifications and variations of the embodiment of the present invention belong to the claims in the present invention
And its within the scope of equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (15)
1. a kind of implementation method of time-shifting function characterized by comprising
The time shift source location set that user's instruction is determined based on the notice of time shift terminal, before obtaining the time shift source location set
, include N number of original slice file including the time shift source location set, wherein N is parameter preset, the slice file
For the file obtained after being sliced according to system default duration to video content；
Slice is re-started according to N number of original slice file of the specified target duration to acquisition, obtains several target slice texts
Part, wherein the target duration is less than the system default duration；
Several target slice files are sent to the time shift terminal, trigger the time shift terminal according to preset step-length in institute
It states in several target slice files and carries out time shift operation, the time shift state pause judgments point until reaching user's instruction.
2. the method as described in claim 1, which is characterized in that according to specified target duration to N number of original slice of acquisition
File re-starts slice, obtains several target slice files, comprising:
N number of original slice file is divided into several file groups, uses corresponding target for each file group respectively
Duration re-starts slice, wherein the corresponding target duration of a file group and one file group and time shift initial position
Distance is positively correlated between point.
3. the method as described in claim 1, which is characterized in that it is whole that several target slice files are sent to the time shift
End, comprising:
It determines the total duration Tn of all target slice files, determine the total duration Tc for generating target slice file needs, and really
Determine the duration of the generation Ts of time shift operation；
If Ts > Tn+Tc, whole target slice files is sent to time shift terminal；
If Ts≤Tn+Tc, it is determined that when user indicates time shift end position point, based on the time shift end position point stop to
Time shift terminal sends target slice file.
4. method as claimed in claim 1,2 or 3, which is characterized in that further comprise:
The pause source location set of user's instruction is determined based on the notice of time shift terminal；
Judge in generated original slice file, if exist using the time-out position point as the original slice of starting point text
Part, if so, otherwise then directly acquiring the original slice file as pause slice file it is true to be based on the time-out position point
Determine starting point, slice is re-started to the video content after the starting point, obtains pause slice file；
The pause slice file of acquisition is sent to time shift terminal, triggering time shift terminal is based on institute when user indicates to terminate pause
Pause slice file is stated to start to play video content.
5. method as claimed in claim 4, which is characterized in that determine starting point based on the time-out position point, comprising:
Using N seconds before time-out position point location points as starting point, wherein N >=0.
6. a kind of implementation method of time-shifting function characterized by comprising
It notifies network server, triggering network server to execute following operation the time shift source location set of user's instruction: obtaining
Before the time shift source location set, comprising N number of original slice file including the time shift source location set, according to specified
Target duration slice is re-started to N number of original slice file of acquisition, obtain several target slice files, wherein N is pre-
Setting parameter, the slice file is the file obtained after being sliced according to system default duration to video content, the target
Duration is less than the system default duration；
Several target slice files that network server issues are received, and according to preset step-length in several target slices
Time shift operation is carried out in file, the time shift state pause judgments point until reaching user's instruction.
7. method as claimed in claim 6, which is characterized in that receive several target slice texts that network server issues
Part, comprising:
It determines the total duration Tn of all target slice files, determine the total duration Tc for generating target slice file needs, and really
Determine the duration of the generation Ts of time shift operation；
If Ts > Tn+Tc, whole target slice files is downloaded；
If Ts≤Tn+Tc, it is determined that when user indicates time shift end position point, being downloaded to includes the time shift end position
When the target slice file of point, stop downloading.
8. method according to claim 6 or 7, which is characterized in that according to preset step-length in several target slice files
Middle carry out time shift operation, comprising:
Since the time shift source location set forward, respectively according to each target slice file and time shift source location set it
Between distance time shift operation is carried out in corresponding target slice file using corresponding time shift frequency.
9. method according to claim 8, which is characterized in that further comprise:
It notifies network server, triggering network server to execute following operation the time shift source location set of user's instruction: being based on
The pause source location set judges in generated original slice file, if exists with the time-out position point for starting
The original slice file of point, if so, otherwise then directly acquiring the original slice file as pause slice file is based on institute
It states time-out position point and determines starting point, slice is re-started to the video content after the starting point, obtain pause slice text
Part；
The pause slice file that network server issues is received, when user indicates to terminate pause, based on pause slice text
Part starts to play video content.
10. a kind of realization device of time-shifting function characterized by comprising
Acquiring unit determines the time shift source location set of user's instruction for the notice based on time shift terminal, obtains the time shift
Before source location set, include N number of original slice file including the time shift source location set, wherein N is default ginseng
Number, the slice file is the file obtained after being sliced according to system default duration to video content；
Processing unit, for re-starting slice according to N number of original slice file of the specified target duration to acquisition, if obtaining
Dry target slice file, wherein the target duration is less than the system default duration；
Communication unit triggers the time shift terminal and presses for several target slice files to be sent to the time shift terminal
Time shift operation is carried out in several target slice files according to preset step-length, the time shift state pause judgments until reaching user's instruction
Point.
11. a kind of realization device of time-shifting function characterized by comprising
Communication unit, the time shift source location set for indicating user notify network server, triggering network server to execute
It operates below: before obtaining the time shift source location set, including N number of original slice including the time shift source location set
File re-starts slice according to N number of original slice file of the specified target duration to acquisition, obtains several target slice texts
Part, wherein N is parameter preset, and the slice file obtains after being sliced according to system default duration to video content
File, the target duration are less than the system default duration；
Time shift unit, several target slice files issued for receiving network server, and according to preset step-length in institute
It states in several target slice files and carries out time shift operation, the time shift state pause judgments point until reaching user's instruction.
12. a kind of calculating equipment comprising memory and processor, wherein the memory is described for storing program instruction
Processor requires 1-5 to appoint for calling the program instruction stored in the memory, according to the program instruction perform claim of acquisition
Method described in one.
13. a kind of computer storage medium, which is characterized in that the computer-readable recording medium storage has computer executable
Instruction, the computer executable instructions are for making the computer perform claim require the described in any item methods of 1-5.
14. a kind of calculating equipment comprising memory and processor, wherein the memory is described for storing program instruction
Processor requires 6-9 to appoint for calling the program instruction stored in the memory, according to the program instruction perform claim of acquisition
Method described in one.
15. a kind of computer storage medium, which is characterized in that the computer-readable recording medium storage has computer executable
Instruction, the computer executable instructions are for making the computer perform claim require the described in any item methods of 6-9.
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