CN101998160A - Method and device for recovering network television-recorded program - Google Patents
Method and device for recovering network television-recorded program Download PDFInfo
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- CN101998160A CN101998160A CN2010105491162A CN201010549116A CN101998160A CN 101998160 A CN101998160 A CN 101998160A CN 2010105491162 A CN2010105491162 A CN 2010105491162A CN 201010549116 A CN201010549116 A CN 201010549116A CN 101998160 A CN101998160 A CN 101998160A
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
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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]
- H04N21/60—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
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/64322—IP
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- Engineering & Computer Science (AREA)
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- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Management Or Editing Of Information On Record Carriers (AREA)
Abstract
The invention discloses a method and a device for recovering a network television-recorded program. The method comprises the following steps of: scanning the recorded program so as to judge whether a failed recorded program is present, if so, scanning all files corresponding to the failed recorded program so as to obtain program recovering information; and recovering the failed recorded program by using the program recovering information. The invention solves the problem that the recorded program cannot be normally played in the prior art, so the fault tolerance of a terminal and the stability between the terminal and a service operating system are improved.
Description
Technical field
The present invention relates to the field, multimedia terminal, in particular to the restoration methods and the device of a kind of IPTV (Internet Protocol Television, Web TV) recorded program.
Background technology
Along with development of science and technology, multimedia terminal product, such as smart mobile phone, palmtop PC, IPSTB (IP set-top box), all kinds of watch-dogs and video conferencing etc. can progressively enter huge numbers of families, become indispensable part in people's life, for example the IP set-top box is as a kind of typical multimedia terminal equipment, with its abundant program source, mode of operation easily, the strong multimedia business function has good development in a lot of places.
Program recording is a business function of set-top box, is that program storage with in progress program or certain period is in peripheral hardware, so that view and admire repeatedly.(the TS encapsulation is a kind of Streaming Media encapsulation format because the program of playing in the IPTV field adopts the TS encapsulation, by ISO/IEC 13818 regulations), this encapsulation format does not have the key frame concordance list, so just can not do trick mode operations such as F.F., rewind down and location as network audio-video files such as AVI, MKV.Therefore set-top box is when recording, can not be only store media files only, also to carry out part TS grammer, PES grammer and image strip syntactic analysis to it, PTS (Presentation Time Stamp with key frame, the reproduction time mark), size and side-play amount all come out, write in the file, this file is the key frame index file.
In order to read conveniently, media file is also with the burst storage, as shown in Figure 1.In case certain burst occurs writing or read error, can also skip this burst, next burst is operated.Each Media Stream of recording all leaves under the file, this wherein has a burst index file (to be used for writing down the duration of whole program, what bursts are arranged, information such as zero-time that each burst is play and duration), corresponding key frame index file of N slicing files and each slicing files.
The file structure of recording out as shown in Figure 1.When normal play, be not need index file to participate in, only need read slicing files one by one and play just passable by code check.When trick mode such as needs fast forwarding and fast rewinding, location operate, just need find corresponding key frame.If location, just need find this time point in certain slicing files according to the burst index file, look in this slicing files more specifically is that the reproduction time of which key frame is consistent with this time point, after finding, taking out the side-play amount of this key frame, is that starting point begins to continue to play from this side-play amount just.If fast forwarding and fast rewinding, just need find certain hour key frame place at interval, come out according to side-play amount and this key frame of size taking-up again, this key frame is played back according to certain strategy, and then repeat this operation, till recovering normal play.
The process of recording is the process of a continuous written document, stability requirement to system is very high, in case unexpected power-down conditions occurs, (content of file is read by the linux system to the mode of file access in the linux system, write, if reading the back power down, just the content of possible file does not have enough time to write back in the file again) cause some slicing files of reading and writing to damage, thereby cause recorded program normal play maybe can't carry out trick mode operation, even crash.
Summary of the invention
Main purpose of the present invention is to provide a kind of restoration methods and device of IPTV recorded program, to address the above problem at least.
According to an aspect of the present invention, provide a kind of restoration methods of IPTV recorded program, it comprises: judge whether to exist the program of recording failure by institute's recorded program is scanned; If exist, then the described All Files of recording the program correspondence of failure scanned and obtain the program recovering information; Use described program recovering information that the described program of recording failure is recovered.
Further, the described All Files of recording the program correspondence of failure is scanned the step that obtains the program recovering information to be comprised: the parameter information that obtains all slicing files of the described program of recording failure by described scanning, wherein, described parameter information comprises: the broadcast zero-time and the duration of the quantity of described slicing files, each described slicing files; Described parameter information is recorded in the burst index file of the described program of recording failure, wherein, described program recovering information comprises described burst index file.
Further, the described All Files of recording the program correspondence of failure is scanned the step that obtains the program recovering information also to be comprised: the broadcast information that obtains each key frame of each described slicing files by described scanning, wherein, described broadcast information comprises: reproduction time mark PTS, position and size; The broadcast information of all key frames of each described slicing files is recorded respectively in the key frame index file corresponding with this slicing files, wherein, the corresponding described key frame index file of described slicing files, described program recovering information also comprises the key frame index file.
Further, the described All Files of recording the program correspondence of failure is scanned the step that obtains the program recovering information also to be comprised: the code stream to the latter end of the code stream of the beginning of first described slicing files part and last described burst scans, and obtains first described key frame and last described key frame; The difference of calculating the PTS of described first key frame and described last key frame obtains the described playing duration of recording the program of failure; Described playing duration is recorded in the described burst index file.
Further, the described All Files of recording the program correspondence of failure being scanned the step that obtains the program recovering information also comprises: the file size of calculating all described slicing files by system function; The file size sum of calculating all described slicing files obtains the described size of recording the program of failure; The described size of recording the program of failure is recorded in the described burst index file.
Further, the described All Files of recording the program correspondence of failure being scanned the step that obtains the program recovering information also comprises: the PTS that reads first key frame in each described key frame index file; The described PTS that reads is recorded in the described burst index file.
Further, use described program recovering information that the step that the described program of recording failure recovers is comprised: to use described burst index file to play the described program of recording failure.
According to a further aspect in the invention, provide a kind of recovery device of IPTV recorded program, it comprises: judging unit is used for judging whether to exist the program of recording failure by institute's recorded program is scanned; Scanning element is used for existing describedly when recording the program of failure, the described All Files of recording the program correspondence of failure is scanned obtain the program recovering information; Recovery unit is used to use described program recovering information that the described program of recording failure is recovered.
Further, described scanning element comprises: first scan module, be used for obtaining the parameter information of all slicing files of the described program of recording failure by described scanning, wherein, described parameter information comprises: the broadcast zero-time and the duration of the quantity of described slicing files, each described slicing files; First logging modle is used for described parameter information is recorded the described burst index file of recording the program of failure, and wherein, described program recovering information comprises described burst index file.
Further, described scanning element also comprises: second scan module, be used for obtaining the broadcast information of each key frame of each described slicing files by described scanning, and wherein, described broadcast information comprises: reproduction time mark PTS, position and size; Second logging modle, be used for the broadcast information of all key frames of each described slicing files is recorded the key frame index file corresponding with this slicing files respectively, wherein, the corresponding described key frame index file of described slicing files, described program recovering information also comprises the key frame index file.
In the present invention, repaired the program that damages, solved the problem that recorded program in the prior art can't normal play maybe can't carry out trick mode operation, improved terminal fault-tolerance and and business operation system between stability.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the structure chart according to the set-top box slicing files of correlation technique;
Fig. 2 is a kind of preferred flow chart according to the restoration methods of the IPTV recorded program of the embodiment of the invention;
Fig. 3 is a kind of preferred construction figure according to the recovery device of the IPTV recorded program of the embodiment of the invention;
Fig. 4 is the another kind of preferred flow chart according to the restoration methods of the IPTV recorded program of the embodiment of the invention;
Fig. 5 is the another kind of preferred construction figure according to the recovery device of the IPTV recorded program of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing preferable examples of the present invention will be described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.This example has illustrated the flow process of repairing recorded file.
Embodiment 1
Fig. 2 is that it comprises the steps: according to a kind of preferred flow chart of the restoration methods of the IPTV recorded program of the embodiment of the invention
S202 judges whether to exist the program of recording failure by institute's recorded program is scanned;
S204 if exist, then scans the described All Files of recording the program correspondence of failure and obtains the program recovering information;
S206 uses described program recovering information that the described program of recording failure is recovered.
In this preferred embodiment, obtain the program recovering information by scanning, so that repair the program that damages, solved the problem that recorded program in the prior art can't normal play maybe can't carry out trick mode operation, improved terminal fault-tolerance and and business operation system between stability.In addition, for the user, also saved because of secondary and recorded the time and efforts that spends.
Preferably, the described All Files of recording the program correspondence of failure is scanned the step that obtains the program recovering information to be comprised: the parameter information that obtains all slicing files of the described program of recording failure by described scanning, wherein, described parameter information comprises: the broadcast zero-time and the duration of the quantity of described slicing files, each described slicing files; Described parameter information is recorded in the burst index file of the described program of recording failure, wherein, described program recovering information comprises described burst index file.In this preferred embodiment, the parameter information that can effectively utilize the slicing files that obtains recovers the program that slicing files damages.
Preferably, the described All Files of recording the program correspondence of failure is scanned the step that obtains the program recovering information also to be comprised: the broadcast information that obtains each key frame of each described slicing files by described scanning, wherein, described broadcast information comprises: reproduction time mark PTS, position and size; The broadcast information of all key frames of each described slicing files is recorded respectively in the key frame index file corresponding with this slicing files, wherein, the corresponding described key frame index file of described slicing files, described program recovering information also comprises the key frame index file.In this preferred embodiment, can effectively utilize the slicing files that obtains and key frame index file the program that slicing files and key frame index file damage is recovered.
Preferably, the described All Files of recording the program correspondence of failure is scanned the step that obtains the program recovering information also to be comprised: the code stream to the latter end of the code stream of the beginning of first described slicing files part and last described burst scans, and obtains first described key frame and last described key frame; The difference of calculating the PTS of described first key frame and described last key frame obtains the described playing duration of recording the program of failure; Described playing duration is recorded in the described burst index file.In this preferred embodiment, can effectively utilize the slicing files that obtains and key frame index file the program that slicing files and key frame index file damage is recovered.
Preferably, the described All Files of recording the program correspondence of failure being scanned the step that obtains the program recovering information also comprises: the file size of calculating all described slicing files by system function; The file size sum of calculating all described slicing files obtains the described size of recording the program of failure; The described size of recording the program of failure is recorded in the described burst index file.In this preferred embodiment, can effectively utilize the slicing files that obtains the program that slicing files damages is recovered.
Preferably, the described All Files of recording the program correspondence of failure being scanned the step that obtains the program recovering information also comprises: the PTS that reads first key frame in each described key frame index file; The described PTS that reads is recorded in the described burst index file.In this preferred embodiment, can effectively utilize the slicing files that obtains and key frame index file the program that slicing files and key frame index file damage is recovered.
Preferably, use described program recovering information that the step that the described program of recording failure recovers is comprised: to use described burst index file to play the described program of recording failure.In this preferred embodiment, can effectively utilize the slicing files that obtains the program that slicing files damages is recovered.
Preferably, because the file that will scan can be very big, so can make a mark to normally recording the file of finishing, be used to illustrate that this file of recording is complete, such file does not just need to have scanned.After a process normal termination of recording, such mark just is set.So in the time will playing certain file of recording, finding does not have such mark, will repair this file of recording.
Therefore, by institute's recorded program is scanned judge whether to exist the program of recording failure before, also comprise: detect institute's recorded program and whether be provided with and normally record mark,, then this recorded program is not scanned if exist.
Embodiment 2
Fig. 3 is that it comprises according to a kind of preferred construction figure of the recovery device of the IPTV recorded program of the embodiment of the invention: scan module 302, reparation module 304, TS bag demultiplexing module 306, system module 308.
Wherein, system module 308 is used for the function of system mutual, thereby obtains information such as the structure of recorded file and path.
TS bag demultiplexing module 306 is used for being responsible for demultiplexing TS bag, analyzes the type of each frame, the PTS of each frame, displacement and size.
In this preferred embodiment, the reparation step of repairing module 304 can reference example 1, does not repeat them here.Obtain recording the program of failure by scanning, and repair, solved the problem that recorded program in the prior art can't normal play maybe can't carry out trick mode operation, improved terminal fault-tolerance and and business operation system between stability.In addition, for the user, also saved because of secondary and recorded the time and efforts that spends.
Embodiment 3
Fig. 4 is the another kind of preferred flow chart according to the restoration methods of the IPTV recorded program of the embodiment of the invention, and it comprises the steps:
S402 scans all recorded programs.
S404 searches the program whether failure of recording is arranged; If exist, then go to step S406; Otherwise, then go to step S418.
S406 for the program of recording failure, enters its file, and all files are scanned, and notes the name file_names of all slicing files and its index file.
S408 scans the code stream of ending place of the code stream of the beginning of first slicing files part and last burst, finds out first key frame and last key frame respectively.The difference of calculating the PTS of above-mentioned two key frames obtains the playing duration totalTime of program.
S410, the calling system function calculation goes out the size of all bursts in this program, and the big or small sum of calculating all slicing files obtains the big or small file_length of program recording.
S412 scans last slicing files, notes PTS, position and the size of each key frame, and is written in the key frame index file of last slicing files.If this index file is meaningful, just it is override.
S414 reads each key frame index file, and writes down the PTS of first key frame.
S416 records the information among the S402-S412 in the burst index file.
S418, scanning is finished.
In this preferred embodiment, play the program of damage by burst index file and key frame index file after upgrading, thereby reach the purpose of recovery, solved the problem that recorded program in the prior art can't normal play maybe can't carry out trick mode operation, improved terminal fault-tolerance and and business operation system between stability.In addition, for the user, also saved because of secondary and recorded the time and efforts that spends.
Embodiment 4
Fig. 5 is that it comprises according to the another kind of preferred construction figure of the recovery device of the IPTV recorded program of the embodiment of the invention: judging unit 502 is used for judging whether to exist the program of recording failure by institute's recorded program is scanned; Scanning element 504 is used for existing describedly when recording the program of failure, the described All Files of recording the program correspondence of failure is scanned obtain the program recovering information; Recovery unit 506 is used to use described program recovering information that the described program of recording failure is recovered.
In this preferred embodiment, obtain the program recovering information by scanning, so that repair the program that damages, solved the problem that recorded program in the prior art can't normal play maybe can't carry out trick mode operation, improved terminal fault-tolerance and and business operation system between stability.In addition, for the user, also saved because of secondary and recorded the time and efforts that spends.
Preferably, described scanning element 504 comprises: first scan module, be used for obtaining the parameter information of all slicing files of the described program of recording failure by described scanning, wherein, described parameter information comprises: the broadcast zero-time and the duration of the quantity of described slicing files, each described slicing files; First logging modle is used for described parameter information is recorded the described burst index file of recording the program of failure, and wherein, described program recovering information comprises described burst index file.In this preferred embodiment, the parameter information that can effectively utilize the slicing files that obtains recovers the program that slicing files damages.
Preferably, described scanning element 504 also comprises: second scan module, be used for obtaining the broadcast information of each key frame of each described slicing files by described scanning, and wherein, described broadcast information comprises: reproduction time mark PTS, position and size; Second logging modle, be used for the broadcast information of all key frames of each described slicing files is recorded the key frame index file corresponding with this slicing files respectively, wherein, the corresponding described key frame index file of described slicing files, described program recovering information also comprises the key frame index file.In this preferred embodiment, can effectively utilize the slicing files that obtains and key frame index file the program that slicing files and key frame index file damage is recovered.
Preferably, 504 pairs of described All Fileses of recording the program correspondence of failure of scanning element scan the step that obtains the program recovering information and also comprise: the code stream to the latter end of the code stream of the beginning of first described slicing files part and last described burst scans, and obtains first described key frame and last described key frame; The difference of calculating the PTS of described first key frame and described last key frame obtains the described playing duration of recording the program of failure; Described playing duration is recorded in the described burst index file.In this preferred embodiment, can effectively utilize the slicing files that obtains and key frame index file the program that slicing files and key frame index file damage is recovered.
Preferably, 504 pairs of described All Fileses of recording the program correspondence of failure of scanning element scan the step that obtains the program recovering information and also comprise: the file size of calculating all described slicing files by system function; The file size sum of calculating all described slicing files obtains the described size of recording the program of failure; The described size of recording the program of failure is recorded in the described burst index file.In this preferred embodiment, can effectively utilize the slicing files that obtains the program that slicing files damages is recovered.
Preferably, 504 pairs of described All Fileses of recording the program correspondence of failure of scanning element scan the step that obtains the program recovering information and also comprise: the PTS that reads first key frame in each described key frame index file; The described PTS that reads is recorded in the described burst index file.In this preferred embodiment, can effectively utilize the slicing files that obtains and key frame index file the program that slicing files and key frame index file damage is recovered.
Preferably, recovery unit 506 uses described program recovering information that the step that the described program of recording failure recovers is comprised: use described burst index file to play the described program of recording failure.In this preferred embodiment, can effectively utilize the slicing files that obtains the program that slicing files damages is recovered.
Preferably, because the file that will scan can be very big, so can make a mark to normally recording the file of finishing, be used to illustrate that this file of recording is complete, such file does not just need to have scanned.After a process normal termination of recording, such mark just is set.So in the time will playing certain file of recording, finding does not have such mark, will repair this file of recording.
Therefore, by institute's recorded program is scanned judge whether to exist the program of recording failure before, also comprise: whether judging unit 502 detects institute's recorded programs and is provided with and normally records mark, if exist, then this recorded program is not scanned.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the restoration methods of a network TV IPTV recorded program is characterized in that, comprising:
By being scanned, institute's recorded program judges whether to exist the program of recording failure;
If exist, then the described All Files of recording the program correspondence of failure scanned and obtain the program recovering information;
Use described program recovering information that the described program of recording failure is recovered.
2. method according to claim 1 is characterized in that, the described All Files of recording the program correspondence of failure is scanned the step that obtains the program recovering information comprise:
Obtain the parameter information of all slicing files of the described program of recording failure by described scanning, wherein, described parameter information comprises: the broadcast zero-time and the duration of the quantity of described slicing files, each described slicing files;
Described parameter information is recorded in the burst index file of the described program of recording failure, wherein, described program recovering information comprises described burst index file.
3. method according to claim 2 is characterized in that, the described All Files of recording the program correspondence of failure is scanned the step that obtains the program recovering information also comprise:
Obtain the broadcast information of each key frame of each described slicing files by described scanning, wherein, described broadcast information comprises: reproduction time mark PTS, position and size;
The broadcast information of all key frames of each described slicing files is recorded respectively in the key frame index file corresponding with this slicing files, wherein, the corresponding described key frame index file of described slicing files, described program recovering information also comprises the key frame index file.
4. method according to claim 2 is characterized in that, the described All Files of recording the program correspondence of failure is scanned the step that obtains the program recovering information also comprise:
Code stream to the latter end of the code stream of the beginning of first described slicing files part and last described burst scans, and obtains first described key frame and last described key frame;
The difference of calculating the PTS of described first key frame and described last key frame obtains the described playing duration of recording the program of failure;
Described playing duration is recorded in the described burst index file.
5. method according to claim 2 is characterized in that, the described All Files of recording the program correspondence of failure is scanned the step that obtains the program recovering information also comprise:
Calculate the file size of all described slicing files by system function;
The file size sum of calculating all described slicing files obtains the described size of recording the program of failure;
The described size of recording the program of failure is recorded in the described burst index file.
6. method according to claim 3 is characterized in that, the described All Files of recording the program correspondence of failure is scanned the step that obtains the program recovering information also comprise:
Read the PTS of first key frame in each described key frame index file;
The described PTS that reads is recorded in the described burst index file.
7. according to each described method in the claim 2 to 6, it is characterized in that, use described program recovering information that the step that the described program of recording failure recovers is comprised:
Use described burst index file to play the described program of recording failure.
8. the recovery device of a network TV IPTV recorded program is characterized in that, comprising:
Judging unit is used for judging whether to exist the program of recording failure by institute's recorded program is scanned;
Scanning element is used for existing describedly when recording the program of failure, the described All Files of recording the program correspondence of failure is scanned obtain the program recovering information;
Recovery unit is used to use described program recovering information that the described program of recording failure is recovered.
9. device according to claim 8 is characterized in that, described scanning element comprises:
First scan module is used for obtaining by described scanning the parameter information of all slicing files of the described program of recording failure, and wherein, described parameter information comprises: the broadcast zero-time and the duration of the quantity of described slicing files, each described slicing files;
First logging modle is used for described parameter information is recorded the described burst index file of recording the program of failure, and wherein, described program recovering information comprises described burst index file.
10. device according to claim 9 is characterized in that, described scanning element also comprises:
Second scan module is used for obtaining by described scanning the broadcast information of each key frame of each described slicing files,
Wherein, described broadcast information comprises: reproduction time mark PTS, position and size;
Second logging modle, be used for the broadcast information of all key frames of each described slicing files is recorded the key frame index file corresponding with this slicing files respectively, wherein, the corresponding described key frame index file of described slicing files, described program recovering information also comprises the key frame index file.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105491162A CN101998160A (en) | 2010-11-17 | 2010-11-17 | Method and device for recovering network television-recorded program |
| PCT/CN2011/082342 WO2012065559A1 (en) | 2010-11-17 | 2011-11-17 | Method and device for restoring program recoded through iptv |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105491162A CN101998160A (en) | 2010-11-17 | 2010-11-17 | Method and device for recovering network television-recorded program |
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| CN108024138A (en) * | 2016-10-31 | 2018-05-11 | 杭州海康威视数字技术股份有限公司 | A kind of method for packing and device |
| CN113938741A (en) * | 2021-12-08 | 2022-01-14 | 聚好看科技股份有限公司 | Server and media asset playing exception handling method |
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| CN101420603A (en) * | 2008-09-05 | 2009-04-29 | 中兴通讯股份有限公司 | Method for implementing media distribution, positioning by segmented memory and stream media system thereof |
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