CN1858762A - Digital copyright managing method - Google Patents
Digital copyright managing method Download PDFInfo
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- CN1858762A CN1858762A CN200510102264.9A CN200510102264A CN1858762A CN 1858762 A CN1858762 A CN 1858762A CN 200510102264 A CN200510102264 A CN 200510102264A CN 1858762 A CN1858762 A CN 1858762A
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- 238000000034 method Methods 0.000 title description 16
- 238000007726 management method Methods 0.000 claims abstract description 50
- 230000011218 segmentation Effects 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 description 15
- 230000008569 process Effects 0.000 description 10
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
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Abstract
This invention discloses a digital copyright management method, which introduces a digital media sectional management in the current DRM, sets a counter in a copyright object, the register terminal of which can play times of the media file completely and the media file is managed and played by a DRM Agent to set it sectionally in the copyright object and control the play, at the same time, the user can play or play back in a certain sphere by itself so that the suer has stronger decision-making power in watching.
Description
Technical field
The present invention relates to the digital copyright management field, especially relate to a kind of in digital copyright management, the method for digital content being carried out sectional management.
Background technology
Development along with technology, the transmission of information is with shared more convenient, but the convenience of information sharing has also brought a very big problem: the distribution of digital content is with shared more convenient than in the past, how it is carried out copyright control, the rights and interests that guarantee the copyright owner are without prejudice is a big problem, and digital copyright management DRM (Digital Right Management) produces for addressing this problem just.
At present, the core concept of digital copyright management DRM is media object MO (Media Object) and the separating of right objects RO (Right Object), wherein, media object MO is meant and adds overstocked digital content, promptly is the product that " primary " digital content is encrypted, and RO has then comprised the key that MO is decrypted, the interest field that allows use has also been described simultaneously, promptly be used as certain restriction to how to make, as number of times, time or the like.The user takes after the MO and can't use, and obtain corresponding RO by the time could use, and therefore, system only need control the distribution of RO.Usually MO can arbitrarily distribute, so-called super distribution that Here it is (Super Distribution), but the terminal binding characteristic of RO makes any distribution of RO become meaningless.
The main benefit of DRM has 2 points: prevent that the user from obtaining " primary " digital content and arbitrarily distribution, provide varied flexible control strategy to the use of digital content more exactly.
The existing DRM system of following brief description comes the controls playing number of times by RO technical scheme:
DRM mainly is made up of 3 big functional entitys: content publisher CI (Content Issuer) is responsible for the issue of content; copyright publisher RI (Right Issuer) is responsible for the distribution of RO; DRM acts on behalf of (DRMagent; the device of processing DRM relevant issues in the terminal) executor as local DRM operating strategy resides on the terminal device; when the terminal user download by certain mode finish protected digit content after; the user just files an application to RI; RI collects corresponding cost and generates corresponding right objects RO according to user's application situation, and the user just can reproduce digital content with it after receiving this RO.
The reproduction process of digital content is finished by digital copyright management proxy DRM Agent, DRM Agent and copyright publisher RI come into contacts with, DRM Agent is controlling local right objects RO simultaneously, the service regeulations of the last description of RO realize by DRM Agent, also to carry out corresponding modification for the RO that state is arranged, the state that has here refers in the use of RO, can carry out certain modification to the data of its inside, buy right of broadcasting 5 times such as the user, play and once will revise again right of broadcasting and be limited to 4 times.
Above having the RO of broadcasting time an attribute counter (count) is arranged, its property value is a positive integer, has represented and has used this RO, the number of times that corresponding MO can play.As there is a following description:
<o-dd：count>5</o-dd：count>
Then expression uses this RO can play corresponding M O five times.When beginning to play, DRM Agent can check this numerical value, and that just can't be play once more if not positive integer, otherwise then allows to play, and subtracts 1 with seasonal count value.
Prior art is the time counter timed-count that count is increased an expansion for the improvement of such scheme, and increase an attribute field timer, it is a time value, broadcast begins through just revising the numerical value of count after the timer duration, as then count numerical value is constant less than timer, therefore count can think the timed-count of timer=0, promptly stops broadcast less than this time period timer the time when reproduction time, and broadcasting time count value is constant.
In sum, there is following shortcoming in existing scheme:
(1) suppose the user in the process of watching owing to non-subjective reason (as the terminal power deficiency) is shut down, even just begun to play, counter also accounting is once also calculated the user and has been seen one time, to user's unfairness.
(2) even there is timed-count to be considered as not playing once in certain time length, but the duration of timer is generally very short, has little significance, and only maloperation such as click is effective unintentionally at some.
(3) if the user wishes that rollback plays the content watch the front, can rollback for whether and degree that can rollback, prior art does not have solution.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, a kind of digital rights object sectional management method is provided, this method has effectively solved interrupts playing the problem of playing with user's autonomous positioning under certain number of times constraint condition.
For achieving the above object, the present invention adopt technical scheme as follows:
A kind of digital copyright management method, counter is set in right objects, the number of times of the complete playing media file of record terminal, it is characterized in that, further to the media file segmentation, and be recorded in the right objects, during terminal plays, control the media file decodes and plays by right objects by digital copyright management proxy.
Above-mentioned with the media file segmentation and be recorded in the right objects, be meant the section of setting up size and segment identification in described right objects, the segmentation criteria of its stage casing size recording medium file, segment identification writes down current broadcast segment number.
Above-mentioned digital copyright management proxy by right objects control media file decodes and plays further is
-digital copyright management proxy is checked Counter Value, if Counter Value, then changes the step down greater than 0, otherwise, will not play;
-digital copyright management proxy is from right objects present segment position decoding, and sends media renderer plays to;
-present segment finishes, and digital copyright management proxy is revised the segment identification in the right objects, repeats previous step;
-playback of media files finishes, and digital copyright management proxy is revised Counter Value, make it subtract 1, and the replacement segment identification is 0.
If terminal is provided with the target location that media file begins to play, then
If the target location is less than the present segment initial position, it is the present segment initial position that digital copyright management proxy is provided with the target location, and send media renderer plays to from present segment initial position decoding, perhaps, it is target phase that digital copyright management proxy is provided with present segment, and the modification Counter Value, make it subtract 1, send media renderer plays to from the target location decoding; Otherwise it is target phase that digital copyright management proxy is provided with present segment, sends media renderer plays to from the target location decoding;
If the target location is greater than the present segment end position, it is poor that then digital copyright management proxy calculates both segment numbers, upgrades present segment in the right objects and be designated current segment number to add segment number poor;
If the target location is less than the present segment initial position, digital copyright management proxy further prompt terminal brings into use another time to play right, and is used by terminal check;
Above-mentioned digital rights agent further is persisted to it in right objects after revising segment identification and/or Counter Value.
The segmentation of above-mentioned media file can be that unit is provided with when issuing right objects by the copyright publisher with time span, size of data or both ratios of media file.
By method of digital content being carried out the sectional management controls playing provided by the present invention, no matter the user is initiatively still interrupted arbitrarily when watching Digital Media passively, can play from point of interruption continuation last time automatically when play next time, can carry out rollback within the specific limits by the autonomous selection of user simultaneously in playing process plays, thereby the user has had stronger autonomy in watching process, strengthened user experience, also guaranteed simultaneously copyright owner's rights and interests, digital copyright management is improved more with practical.
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
Description of drawings
Fig. 1 is media file segmentation playing flow figure provided by the invention;
Fig. 2 is user's autonomous positioning playing flow figure in the embodiment of the invention;
Fig. 3 is the personalisation process process flow diagram that user's autonomous positioning is play among Fig. 2 of the present invention.
Embodiment
The present invention has the use constraint of certain number of times to media object in view of existing digital copyright management, further media file being divided into some elementary sections (segment) manages, in right objects RO, increase corresponding attribute field simultaneously, be used for writing down active cell section segment, have only all elementary sections to finish and just count once complete broadcast, be equivalent to possess the function of " breakpoint broadcast ", simultaneously segment is made as the maximum constraints that rollback is play, promptly can only carry out rollback in a segment watches, can not cross a segment forward, i.e. unlimited rollback.
The concrete enforcement of this programme is as follows.
At first be in right objects RO, to increase attribute field, in order to write down current in progress present segment (segment), outside original counter (count) attribute field, increase attribute field present segment (current_segment) and section size (segment_size), just in the size of present segment He each elementary section of playing media file, wherein the current_segment property value is a positive integer in expression respectively.
A media file can carry out the division of segment according to different strategies, such as dividing according to time span, perhaps divides according to size of data and other mode.
According to said method, the specific embodiment that carries out the segmentation setting according to the time span of media file is as follows;
The service regeulations that RO is play are provided with following constraint condition:
<！ELEMENT?o-dd：count_constrain(o-dd：count，o-dd：current_segment，o-dd：segment_size)>
<！ELEMENT?o-dd：count(#PCDATA)>
<！ELEMENT?o-dd：current_segment(#PCDATA)>
<！ELEMENT?o-dd：segment_size(#PCDATA)>
The XML document corresponding with it is provided with as follows:
<o-ex：permission>
<o-dd：play>
<o-ex：constraint>
<o-dd：count_constrain>
<o-dd：count>5</o-dd：count>
<o-dd：current_segment>3</o-dd：current_segment>
<o-dd：segment_size>5</o-dd：segment_size>
</o-dd：count_constrain>
</o-ex：constraint>
</o-dd：play>
</o-ex：permission>
Above-mentioned example is to divide with time span, therefore segment is unit with the time span, as minute, top example is expressed as media file and can also plays five times again, current in progress be the 3rd section, every section size is 5 minutes, but for a certain reason, before having write down, play 5*3=15 minute the current_segment of RO, therefore be to play in just the 15th minute since the 3rd segment next time, therefore, here five times comprise four complete broadcasts and once incomplete broadcast.
Media file in the foregoing description also can be divided according to data segment, can it be divided into plurality of sections according to the size of media file such as RI, is 100M as file size, and each section size is 1M, so just is divided into 100 sections.Whole process is similar with the processing of dividing according to timeslice, is not repeated herein.
Another embodiment is according to certain ratio section of setting size of file, such as 10%, unit can be above-mentioned timeslice size or size of data, be that with the method difference of front DRM Agent wants elder generation to obtain the size of media file from MO at first, calculate actual elementary section size according to proportional meter then, can be time period size or data segment size, all the other processing be similar.
RI can require according to user's application the count value is set when issue RO, buys right of broadcasting 5 times such as the user, and then count=5 is provided with current_segment=0 simultaneously, and expression starts anew to play.And segment_size can be provided with suitable value according to the playing duration or the data volume size of media file, such as if duration is bigger, segment_size value then can be set a little louder, on the contrary point then.
Further specify the RO that how to use and control after the expansion below with reference to Fig. 1 and realize purpose of the present invention.
At first be the problem that the breakpoint that solves of the present invention is play, as shown in Figure 1, idiographic flow is as follows:
Step 1.DRM Agent at first checks count, does not withdraw from if not operating directly greater than 0, and promptly the user haves no right to watch.
If step 2. count is greater than 0, DRM Agent just begins decoding from current_segment and sends player to and play.
The current_segment place of this moment is meant the present segment initial position, can be obtained by the segment number section of multiply by size.
If this moment, current_segment was 0, promptly begin to play from media file.
Step 3. judges whether whole file finishes, if whole file does not also finish, then whenever play a segment, DRM Agent revises current_segment makes it add 1 and it is persisted on the RO, then forward step 2 to, promptly play next segment.
The persistence here is a kind of optimization process mode, finger will be revised and further be saved on the hard disk, prevent if only internal memory modification meeting loses memory information because of emergency situations such as outages, thereby cause the modification that to make originally to be lost, can't reach the desired effect of this case technical scheme.
The in a single day whole file of step 4. is play and is finished, and promptly all segment finish complete, and the presentation medium file finishes once, DRM Agent revises count, makes its value subtract 1, and the current_segment that at this moment resets is 0, from the beginning expression plays next time, preserves the modification of the two on RO.
Like this, the user as if interrupting for some reason, then can not count once and play in playing media file, plays next time still and can play from the beginning of the segment of interruption before this, have only when whole segment finish just to calculate and do once complete broadcast, ensured user's rights and interests.
Secondly, the present invention has solved the rollback playback problem that the user runs into often by the sectional management to media file, it allows user's rollback in certain scope to watch, the scope here refers in the current broadcast unit segment limit, the ultimate range that the user can move backward is to arrive this segment to begin the place, therefore this ultimate range is relevant with current broadcast point, if promptly at the segment place that closes to an end, ultimate range almost is a segment size so, if instead just begun the place at segment, the ultimate range of this moment is equivalent to 0.
Therefore the segment size will be provided with suitable numerical value, if segment is too big, and media file is smaller, supposes to have only a segment, and that just is equivalent to and can infinitely replays; If segment is too little, then the scope that the user can rollback is just too little.
Below in conjunction with Fig. 2 describe in detail the user how autonomous positioning (rollback or advance) watch:
The wanted representative of consumer is wished the position that moves on to, the actual target locations of the final location of target representative of consumer, and this information is sent to DRM Agent by player.
If step 2. wanted begins the place greater than this segment, then DRM Agent directly is provided with target (actual target locations) and equals wanted, and rollback is watched herein
Step 3. otherwise target just are set to this segment and begin the place, and expression surpasses maximum rollback scope, at most can only rollback begin the place to this segment.
Step 4. judges whether actual target locations begins the place greater than this section, if then revise current_segment numerical value;
Owing to can drag backward, may cross over current segment, if therefore target equals wanted simultaneously again greater than this segment end, then need to revise current_segment numerical value, concrete grammar is the distance (the segment quantity of leap) of DRM Agent by calculating target and segment end, revises current_segment and also is persisted on the RO.
DRM Agent just began decoding and sends player to play from target after step 5. aforesaid operations was finished.
At last, play to surpass specialized range, promptly during this segment reference position, also can carry out close friend and remind, the enhancing user experience user's operation for user's rollback.With reference to shown in Figure 3, embodiment is as follows:
If the user has bought the right to use that surpasses once, when generation user rollback surpasses the reference position of current segment, whether inquiring user also has remaining broadcasting time, be whether the count value is greater than zero, if there has not been residue degree, then can only play by the interior rollback of section, if still have residue degree, can remind the user if return back to appointed positions by close friend's prompting, this broadcast closes to an end, and will begin another time broadcast, agree as the user, then begin once to play in addition, and be repositioned onto user's appointed positions, this is non-automatic mode; If the user feels always to point out pretty troublesome in addition, then can be provided with according to user's preference, can be set to automatic mode, needn't get final product but only provide corresponding prompting through reaffirming.
By implementing the present invention, no matter the user is initiatively still interrupted arbitrarily when watching Digital Media passively, can play from point of interruption continuation last time automatically when play next time, can carry out simultaneously rollback in playing process within the specific limits plays, thereby the user has had stronger controlling power in watching process, strengthened user experience, also guaranteed copyright owner's rights and interests simultaneously, DRM is improved more with practical.
Though the present invention with preferred embodiment openly as above; so it is not in order to limit the present invention; do not deviating under spirit of the present invention and the real situation; those of ordinary skill in the art work as can make corresponding change or distortion according to the present invention, but these corresponding changes or distortion all should belong to the protection domain of claims of the present invention.
Claims (12)
1. digital copyright management method, counter is set in right objects, the number of times of the complete playing media file of record terminal, it is characterized in that, further to the media file segmentation, and be recorded in the right objects, during terminal plays, control the media file decodes and plays by right objects by digital copyright management proxy.
2. digital copyright management method as claimed in claim 1, it is characterized in that, described with the media file segmentation and be recorded in the right objects, be meant the section of setting up size and segment identification in described right objects, the segmentation criteria of its stage casing size recording medium file, segment identification writes down current broadcast segment number.
3. digital copyright management method as claimed in claim 2 is characterized in that, described digital copyright management proxy by right objects control media file decodes and plays further is
A. digital copyright management proxy is checked Counter Value, if Counter Value greater than 0, then changes step b, otherwise, will not play;
B. digital copyright management proxy is decoded from the right objects present segment, and sends media renderer plays to;
C. present segment finishes, and digital copyright management proxy is revised the segment identification in the right objects, repeating step b;
D. playback of media files finishes, and digital copyright management proxy is revised Counter Value, make it subtract 1, and the replacement segment identification is 0.
4. digital copyright management method as claimed in claim 3 is characterized in that, if terminal is provided with the target location that media file begins to play, then step b further is
B1. if the target location less than the present segment initial position, it is the present segment initial position that digital copyright management proxy is provided with the target location, and sends media renderer plays to from present segment initial position decoding, otherwise, change b2;
B2. present segment is set is target phase to digital copyright management proxy, sends media renderer plays to from the target location decoding.
5. digital copyright management method as claimed in claim 4 is characterized in that, behind the execution b2, described c further is
C2. if the target location greater than the present segment end position, it is poor that then digital copyright management proxy calculates both segment numbers, revises present segment in the right objects and be designated current segment number to add segment number poor.
6. digital copyright management method as claimed in claim 3 is characterized in that, if terminal is provided with the target location that media file begins to play, described step b further is
B1 '. less than the present segment initial position, it is target phase that digital copyright management proxy is provided with present segment as if the target location, and revises Counter Value, makes it subtract 1, sends media renderer plays to from the target location decoding.
7. as claim 4 or 6 described digital copyright management methods, it is characterized in that less than the present segment initial position, described step b further comprises as if the target location
The digital copyright management proxy prompt terminal brings into use another time to play right;
Terminal check then changes step b1 ';
Otherwise, change b1.
8. as claim 3 or 5 or 6 described digital copyright management methods, it is characterized in that described digital rights agent further is persisted to it in right objects after revising segment identification and/or Counter Value.
9. digital copyright management method as claimed in claim 3 is characterized in that, the segmentation criteria of described media file is that the time span with media file is that unit is provided with.
10. digital copyright management method as claimed in claim 3 is characterized in that, the segmentation criteria of described media file is that the size of data with media file is that unit is provided with.
11. digital copyright management method as claimed in claim 3 is characterized in that, the segmentation criteria of described media file is that the ratio with the time span of media file and size of data is that unit is provided with.
12., it is characterized in that the segmentation of described media file is provided with when issuing right objects by the copyright publisher as the described digital copyright management method of claim 9-11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101022649A CN100461195C (en) | 2005-12-07 | 2005-12-07 | Digital copyright managing method |
| PCT/CN2006/002751 WO2007065337A1 (en) | 2005-12-07 | 2006-10-18 | A digital copyright management method and a digital copyright management agent device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101022649A CN100461195C (en) | 2005-12-07 | 2005-12-07 | Digital copyright managing method |
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| Publication Number | Publication Date |
|---|---|
| CN1858762A true CN1858762A (en) | 2006-11-08 |
| CN100461195C CN100461195C (en) | 2009-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101022649A Active CN100461195C (en) | 2005-12-07 | 2005-12-07 | Digital copyright managing method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100461195C (en) |
| WO (1) | WO2007065337A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103440439A (en) * | 2013-09-05 | 2013-12-11 | 深圳市环球数码科技有限公司 | Method and system for controlling number of playing times of digital movie |
| CN101329713B (en) * | 2007-06-20 | 2015-07-08 | 华为技术有限公司 | Method and apparatus for processing digital content |
| WO2017148245A1 (en) * | 2016-03-01 | 2017-09-08 | 华为技术有限公司 | Rights management method and system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3607486B2 (en) * | 1998-01-21 | 2005-01-05 | 株式会社東芝 | Information recording / reproducing device |
| EP1179240B1 (en) * | 2000-03-09 | 2014-01-08 | Panasonic Corporation | Audio data playback management system |
| AU2003276571A1 (en) * | 2002-12-17 | 2004-07-09 | Koninklijke Philips Electronics N.V. | System to allow content sharing |
| EP1450369A3 (en) * | 2003-02-21 | 2005-02-09 | Lg Electronics Inc. | Resume mark managing method |
| US7278165B2 (en) * | 2003-03-18 | 2007-10-02 | Sony Corporation | Method and system for implementing digital rights management |
| KR20080014929A (en) * | 2003-11-11 | 2008-02-14 | 노키아 코포레이션 | System and method for using drm to control conditional access to broadband digital content |
-
2005
- 2005-12-07 CN CNB2005101022649A patent/CN100461195C/en active Active
-
2006
- 2006-10-18 WO PCT/CN2006/002751 patent/WO2007065337A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329713B (en) * | 2007-06-20 | 2015-07-08 | 华为技术有限公司 | Method and apparatus for processing digital content |
| CN103440439A (en) * | 2013-09-05 | 2013-12-11 | 深圳市环球数码科技有限公司 | Method and system for controlling number of playing times of digital movie |
| CN103440439B (en) * | 2013-09-05 | 2016-03-30 | 深圳市环球数码科技有限公司 | A kind of method and system for controlling digital movie broadcasting time |
| WO2017148245A1 (en) * | 2016-03-01 | 2017-09-08 | 华为技术有限公司 | Rights management method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100461195C (en) | 2009-02-11 |
| WO2007065337A1 (en) | 2007-06-14 |
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