WO2010064393A1 - 再生端末、時刻の管理方法、及びコンテンツの再生システム - Google Patents
再生端末、時刻の管理方法、及びコンテンツの再生システム Download PDFInfo
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- WO2010064393A1 WO2010064393A1 PCT/JP2009/006418 JP2009006418W WO2010064393A1 WO 2010064393 A1 WO2010064393 A1 WO 2010064393A1 JP 2009006418 W JP2009006418 W JP 2009006418W WO 2010064393 A1 WO2010064393 A1 WO 2010064393A1
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- 238000007726 management method Methods 0.000 title claims description 27
- 230000005540 biological transmission Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/02—Marketing; Price estimation or determination; Fundraising
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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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- 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
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
- H04N21/43072—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device
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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
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
- H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
- H04N21/4316—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
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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]
- H04N21/40—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
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4348—Demultiplexing of additional data and video streams
- H04N21/4349—Demultiplexing of additional data and video streams by extracting from data carousels, e.g. extraction of software modules from a DVB carousel
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44012—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving rendering scenes according to scene graphs, e.g. MPEG-4 scene graphs
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/835—Generation of protective data, e.g. certificates
- H04N21/8355—Generation of protective data, e.g. certificates involving usage data, e.g. number of copies or viewings allowed
Definitions
- the present invention relates to a playback terminal for playing back content.
- the present invention relates to a playback terminal that plays back content with deadline information.
- Patent Document 1 stores date / time change information when a date / time change operation is executed as shown in FIG. 1, and determines whether or not date / time change information is recorded when playing music content. When change information is recorded, it is described that reproduction of music content is restricted. For this reason, when the date / time changing operation is performed, it is impossible to reproduce the music content.
- the viewing time limit management method as described above has the inconvenience that content cannot be viewed if the user inadvertently corrects the clock.
- the playback terminal of the present invention when the viewing time limit is not set for the content to be stored, the convenience of the user is improved so that the time of the playback terminal can be set, and the viewing time limit is set. It is an object of the present invention to provide a playback terminal that enhances the protection of the right holder by preventing the time from being set when stored content is stored.
- a playback terminal of the present invention receives a content and viewing time limit information of the content from a content server, and plays back the content, a content storage unit storing the content, Corresponding to content stored in the content storage unit, a viewing time limit information storage unit for storing the viewing time limit information, a clock unit for managing time information, a clock setting instruction unit for receiving input of time of the clock unit If the viewing time limit information is stored in the viewing time limit information storage unit, input of the clock setting instruction unit is not accepted, or time information of the clock unit is received at the time received by the clock setting instruction unit And a control unit for controlling so as not to update.
- the time of the playback terminal cannot be changed, so that the protection of the right holder can be enhanced.
- the time of the playback terminal can be changed, so that convenience for the user can be improved.
- the playback terminal of the present invention limits the time setting only when content with viewing time limit information is stored, and when storing content with no particular limitation on viewing time limit. Setting is possible.
- FIG. 1 is a processing flow diagram of a conventional playback terminal.
- FIG. 2 is a diagram illustrating the configuration of the playback terminal according to the first embodiment.
- FIG. 3 is a process flow diagram of the control unit of the playback terminal in the first embodiment.
- FIG. 4 is a diagram illustrating the configuration of the playback terminal according to the second embodiment.
- FIG. 5 is a process flow diagram of the control unit of the playback terminal in the second embodiment.
- FIG. 6 is a diagram showing an outline of the playback terminal.
- FIG. 7 is a diagram illustrating time setting in the playback terminal.
- FIG. 8 is a diagram illustrating management of content and time limit information.
- FIG. 9 is a diagram illustrating the configuration of the playback terminal according to Embodiment 3.
- FIG. 10 is a process flow diagram of the control unit of the playback terminal in the third embodiment.
- the playback terminal of the present invention allows the user through the interface of the playback terminal. Control is performed so that the time of the clock built in the playback terminal is not updated even when an instruction to update the time is received from.
- FIG. 6 shows a conceptual diagram of the playback terminal.
- the playback terminal in FIG. 6 includes a screen for displaying content, buttons for operating the playback of the content, and function settings of the playback terminal itself, and is an example of a portable device that can view the content. .
- FIG. 2 shows the configuration of the playback terminal 10 in the first embodiment.
- the reproduction terminal 10 includes a control unit 11, a clock setting instruction unit 12, a reproduction instruction unit 13, a content storage unit 14, a viewing time limit information storage unit 15, a clock unit 16, and a reproduction unit 17. Is done.
- the playback terminal 10 is connected to a content server 20 provided outside through a network or the like, and acquires content from the content server 20. Also, information related to the viewing time limit set in the content is acquired as necessary.
- the clock unit 16 manages time information of the playback terminal 10. Power is supplied from a battery or the like (not shown), and the time of the playback terminal is always recorded.
- the playback unit 17 receives an instruction from the control unit 11 and plays back the content.
- Content consists of video and audio.
- images such as moving images and still images displayed on the screen are displayed on a display screen (not shown) that displays an image using an organic EL, inorganic EL, LED, liquid crystal display device, or the like.
- Sounds such as voice and music are reproduced from a speaker or an external earphone terminal (not shown).
- the content storage unit 14 stores the content such as the video, music, and sound described above.
- the video includes still images and moving images, which are MPEG4 and H.264. It is stored as data using an encoding technique such as H.264. Further, there are various formats such as MP3 audio and WAVE format for music and voice, but there is no particular limitation to these.
- the viewing deadline information storage unit 15 stores viewing deadline information that is information related to the viewing deadline of content and the like.
- the viewing deadline information includes period management type viewing deadline information that specifies a period during which the content can be reproduced from the time the content is first reproduced or transferred, and the last period from the first time (start time) during which the content can be reproduced.
- the content can be played back only during a designated period such as 3 days or 1 week after the content is first played back and cannot be played back thereafter. .
- time management type viewing time limit information playback is possible only from 9:00 (9:00) on April 1 to 17:00 (17:00) on April 30. This indicates that playback cannot be performed at the time before or after.
- the time management type viewing time limit information may be a case where only the time when playback is started or the time when playback ends is specified.
- FIG. 8 shows an example of content-related information including content and viewing time limit information.
- the content related information includes, for example, a content identifier for uniquely identifying the content, a content name, a type of content representing a type of video, music, still image, content time limit information, and the like.
- the content indicated by the content identifier “3” has the name “fly-movie”, the content type is “video”, the content time limit information is time management type, and the start of a viewable period The time is 9:00 on April 1, 2009, 09:00 (9: 00: 00: 00), and the end time is 10:00, April 30, 2009, 07:00 (17: 00: 0) It is.
- the name of the content indicated by the content identifier “2” is “fantasy-movie”
- the content type is “video”
- the content time limit information is a period management type, and the first reproduction starts during the viewable period. Indicates that it is 3 days later.
- the playback terminal 10 is connected to an external content server 20 and acquires content and viewing time limit information. At that time, time information is received from the content server 20 and the time of the clock unit 16 is updated.
- the content server 20 is not limited to a server device provided in a content provider or sales company, but may be a recorder in a user's home, a television with a storage function, or the like.
- the content server 20 may be any device connected through a network connected to the playback terminal 10, and may be a server device connected through a television, a recorder, or a personal computer.
- the above-described acquisition of content and viewing time limit information, time update, and the like may be performed by the control unit 11 of the playback terminal 10 or may be performed by another control unit (not shown). Absent.
- the clock setting instruction unit 12 is a means for inputting the time set in the clock unit 16.
- the current date, hour, minute and its correction screen may be displayed on a screen display unit (not shown) by a clock setting menu or the like, and the user may directly input the date, hour, minute. Further, it may be synchronized with the time of an external server or device other than the content server 20 through a communication unit (not shown) connected to the time server periodically or according to a user instruction. Absent.
- the clock setting instruction unit 12 notifies the control unit 11 of a time setting instruction together with the time to be updated set by the user.
- FIG. 7 shows an example of a time setting screen displayed on the playback terminal 10.
- the clock setting menu of the playback terminal 10 is displayed by a menu operation by the user.
- the playback terminal 10 displays the current time with a clock icon or a digitally displayed clock on its display screen, and the user sets a desired time using buttons and menus.
- the reproduction instruction unit 13 receives an instruction to reproduce the content stored in the content storage unit 14 from the user. For example, a list of content stored in the content storage unit 14 may be displayed on a screen display unit (not shown) with icons, content title names, etc., and the user may select the content to be played back. .
- the reproduction instruction unit 13 notifies the control unit 11 of the content reproduction instruction together with the selected content or information such as a content identifier for identifying the content within the reproduction terminal 10.
- the control unit 11 receives the time setting instruction received from the clock setting instruction unit 12 and the content reproduction instruction received from the reproduction instruction unit 13, and performs the respective processes.
- the control unit 11 determines whether or not the viewing time limit information corresponding to the content stored in the content storage unit 14 is stored in the viewing time limit information storage unit 15. Confirm. Of these viewing deadline information, when the period management type or time management type viewing deadline information is set in the content, the control unit 11 does not accept the clock setting instruction from the clock setting instruction unit 12, Control is performed so that the time of the clock unit 16 is not updated. At this time, a message indicating that the time cannot be changed may be displayed on a screen display unit (not shown). When the viewing time limit information is not provided for the content stored in the content storage unit 14, the control unit 11 receives a clock setting instruction from the clock setting instruction unit 12, and follows the instruction from the clock setting instruction unit 12. Control is performed so as to update the time of the unit 16.
- the control unit 11 When the control unit 11 receives an instruction to reproduce the content, the control unit 11 acquires the viewing time limit information corresponding to the selected content from the viewing time limit information storage unit 15. Then, the time acquired from the clock unit 16 is compared with the viewing time limit information to compare whether the current time is a reproducible time specified by the viewing time limit information. If it is a reproducible time, the control unit 11 notifies the reproduction unit 17 of the content selected by the reproduction instruction unit 13. The playback unit 17 plays back the notified content.
- FIG. 3 shows a processing flow of the control unit 11 described above.
- the control unit 11 receives a time update instruction from the clock setting instruction unit 12 (S21).
- control unit 11 confirms whether or not the viewing time limit information is stored in the viewing time limit information storage unit 15 (S22).
- the time of the clock unit 16 is changed based on the time update instruction received from the clock setting instruction unit 12. (S23).
- the time update instruction received from the clock setting instruction unit 12 is not accepted. For this reason, the time of the clock unit 16 is not changed.
- the time setting is restricted only when content with viewing time limit information is stored, and the viewing time limit is not particularly limited.
- the time can be set when stored.
- the time of the playback terminal cannot be changed, so that the protection of the right holder can be enhanced.
- the time of the playback terminal can be changed, so that convenience for the user can be improved.
- Embodiment 2 Regarding the viewing time limit information, in addition to the description in the first embodiment, even if the period management type or time management type viewing time limit information is set, it is formal and can be reproduced indefinitely in practice. Things can be set. In such a case, it can be handled that viewing time limit information is not set. In such a case, for example, a period management type format is used, and viewing time limit information is set so that the content can be played back for an indefinite time when content transfer starts, or a time management type format is adopted. However, the start time is a past time and the end time is not set.
- the time limit is not indefinite, but a predetermined period (for example, 100 years) that is practically indefinite, or an indefinite time (for example, 100 years from the start time) A later time may be set as an end time).
- a substantially indefinite period may be a minimum period that should be protected as defined by the product life of the playback terminal 10 or restrictions such as various laws and regulations. Of course, it may be set to be a predetermined period.
- FIG. 4 shows the configuration of the playback terminal 30 in the second embodiment.
- the configuration of the playback terminal 30 in the second embodiment is the same as that of the playback terminal 10 in the first embodiment except that the operation of the control unit 31 is different, and the constituent elements other than the control unit 31 have the same reference numerals. It expresses using.
- the control unit 31 receives a time setting instruction received from the clock setting instruction unit 12 and a content reproduction instruction received from the reproduction instruction unit 13, and performs respective processes.
- the control unit 31 determines whether or not the viewing time limit information corresponding to the content stored in the content storage unit 14 is stored in the viewing time limit information storage unit 15. Confirm. Of these viewing deadline information, the period management type or time management type viewing deadline information is set when the content is reproduced, and the viewing deadline information is substantially set. The control unit 31 does not accept the clock setting instruction from the clock setting instruction unit 12 and performs control so that the time of the clock unit 16 is not updated.
- the control unit 31 may handle those for which viewing deadline information is not substantially set as those for which viewing deadline information is not set.
- a method for determining what is not substantially set whether or not a predetermined length of time is set when the viewing time limit information is of the period management type, or when the viewing time limit information is of the time management type Can be determined by whether or not a time whose end time is in the future of a predetermined time or more is set.
- the predetermined time may be, for example, 10 years as a period longer than the product lifetime, or 2 to 3 years in the case of electronic equipment that is frequently updated. Also, it may be an update period or an effective period of the copyright management method itself provided as software or a system, or may be a specification development period related to these regulations. Furthermore, a predetermined period may be used for a period longer than the period in which protection is permitted by laws and regulations concerning copyright.
- control unit 31 accepts a clock setting instruction from the clock setting instruction unit 12. Then, control is performed so as to update the time of the clock unit 16 as instructed by the clock setting instruction unit 12.
- the control unit 31 When the control unit 31 receives an instruction to reproduce the content, the control unit 31 acquires the viewing time limit information corresponding to the selected content from the viewing time limit information storage unit 15. Then, the time acquired from the clock unit 16 is compared with the viewing time limit information to compare whether the current time is a reproducible time specified by the viewing time limit information. When it is a reproducible time, the control unit 31 notifies the reproduction unit 17 of the content selected by the reproduction instruction unit 13. The playback unit 17 plays back the notified content.
- FIG. 5 shows a processing flow of the control unit 31 in the second embodiment.
- the control unit 31 receives a time update instruction from the clock setting instruction unit 12 (S41).
- control unit 31 checks whether or not the viewing time limit information is stored in the viewing time limit information storage unit 15 (S42).
- the time of the clock unit 16 is changed based on the time update instruction received from the clock setting instruction unit 12. (S43).
- the viewing deadline information storage unit 15 When it is determined that the viewing deadline information is stored in the viewing deadline information storage unit 15 (Yes in S42), the content of the viewing deadline information is analyzed.
- the time of the playback terminal cannot be changed, so that the protection of the right holder can be enhanced.
- the time of the playback terminal can be changed, so that the convenience of the user is improved. be able to.
- this is a case where the viewable period set as the viewing deadline information is sufficiently long and the time updated by the user is a slight difference.
- the playback terminal 40 according to the third embodiment has substantially the same configuration as the first and second embodiments, and the operation of the control unit 41 is different, but the rest is the same as the first and second embodiments. It is.
- FIG. 9 the operation of the control unit 41 is different from that of the control unit 11 and the control unit 31 in the first and second embodiments.
- the flow of the operation of the control unit 41 is shown in FIG.
- the control unit 41 receives a time update instruction from the clock setting instruction unit 12 (S91).
- control unit 41 confirms whether or not the viewing time limit information is stored in the viewing time limit information storage unit 15 (S92).
- the time of the clock unit 16 is changed based on the time update instruction received from the clock setting instruction unit 12. (S93).
- the viewing deadline information storage unit 15 If it is determined that the viewing deadline information is stored in the viewing deadline information storage unit 15 (Yes in S92), the content of the viewing deadline information is analyzed.
- the end time set in the viewing time limit information is 23:59:59 on March 31, 2012
- the current time is 12:00:00 on December 1, 2008
- the clock setting instruction It is assumed that the time to be updated received from the section 12 is 13:00 on December 1, 2008.
- the difference between the current time and the end time (remaining viewing time limit) is approximately 3 years and March.
- the difference between the current time and the time to be updated is one hour. Since the remaining viewing time limit is sufficiently longer than this one hour, it can be determined that the time update may be permitted.
- the remaining viewing time limit is 1 hour
- the difference between the current time and the time to be updated is 1 minute, it may not be determined that the time is sufficiently small. In such a case, it may be better to add conditions such as a remaining period of at least one day.
- the determination is made under several conditions as follows. can do.
- the condition for determining that the ratio of the difference between the end time set in the viewing time limit information and the current time (remaining viewing time limit) and the difference between the current time and the update time is smaller than a predetermined ratio. It can be.
- the predetermined ratio is, for example, 10: 1 or 100: 1.
- the difference between the current time and the update time may be about several minutes, that is, 1440: 1.
- the difference between the current time and the update time may be about several days, that is, 365: 1.
- the predetermined ratio may be different depending on the remaining viewing time limit, and this ratio is set to approach 1: 1 when the remaining viewing time limit is longer. It doesn't matter.
- the remaining viewing time limit remains for at least a predetermined period
- the determination condition can be that the ratio of the difference between the current time and the update time is a predetermined number or more. In this case, for example, the remaining time remains for about one month, and the difference between the current time and the update time is set to about 1 hour (that is, the ratio of the remaining time is 720: 1). is there.
- the predetermined period of the remaining viewing deadline at this time it may be necessary for at least half of the viewing deadline to remain for those with a viewing deadline of about one week, For items with a viewing deadline of about a year, it may be necessary to have a viewing deadline of several months or more, so it can be determined according to the content viewing deadline.
- the difference between the current time and the update time it may be included in the determination condition that it is within a predetermined time.
- the predetermined time at this time is set, for example, within one hour.
- the time obtained by integrating the date error of the clock for about one month, or at most about several months, may be determined as the predetermined time. For example, assuming that the daily error is 1 minute, the predetermined time is about 3 hours in half a year.
- the remaining viewing time limit is sufficiently large with respect to the current time and the update time, there is at least a certain remaining viewing time limit, and further, the current time and the update time A judgment criterion can be obtained by freely combining the difference within a predetermined time.
- the playback terminal of the present invention since it is determined whether or not the internal clock can be set for the user according to the viewing time limit information of the stored content, the playback terminal having a clock function for carrying the content can be used. Useful.
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Abstract
Description
図2は、実施の形態1における再生端末10の構成を表す。
視聴期限情報については上記実施の形態1に説明した以外にも、期間管理型や時刻管理型の視聴期限情報が設定されていてもそれは形式的であり、実際には無期限に再生できるようなものを設定することができる。このような場合については視聴期限情報が設定されていないものとして扱うことができる。このような場合として、例えば、期間管理型の形式を取りながら、コンテンツの転送開始とともに無期限の時間についてコンテンツが再生できるような視聴期限情報が設定されたものや、時刻管理型の形式を取りながら、開始時刻が過去の時刻でありまた終了時刻が設定されていないものである。また、視聴期限情報が設定されているものの、その期限を無期限とするのではなく実際上無期限となる所定の期間(例えば100年間など)や、無期限の時刻(例えば開始時刻から100年後の時刻を終了時刻とするなど)と設定してもよい。このような実質的に無期限の期間としては、再生端末10の製品としての寿命や、各種法律や規定等の制限から定められている最低限保護すべき期間としてもよい。もちろん、予め定められた所定の期間とするように設定しても構わない。
視聴期限情報の設定内容と、利用者による時刻修正内容との関係においては、コンテンツの視聴期限情報が設定されても、時刻修正を可能とし、コンテンツの再生を許可しても構わない場合がある。
11 制御部
12 時計設定指示部
13 再生指示部
14 コンテンツ格納部
15 視聴期限情報格納部
16 時計部
17 再生部
20 コンテンツサーバ
30 再生端末
31 制御部
40 再生端末
41 制御部
Claims (9)
- コンテンツサーバからコンテンツと当該コンテンツの視聴期限情報とを受信し、当該コンテンツを再生する再生端末であって、
前記コンテンツを格納するコンテンツ格納部と、
前記視聴期限情報を格納する視聴期限情報格納部と、
時刻情報を管理する時計部と、
前記時計部の時刻設定の入力を受け付ける時計設定指示部と、
前記コンテンツ格納部に格納されたコンテンツに対応した視聴期限情報が前記視聴期限情報格納部に格納されている場合には、前記時計設定指示部の入力を受け付けないか、または、前記時計設定指示部で受け付けた時刻では前記時計部の時刻情報を更新しないように制御する制御部と
を備えることを特徴とする再生端末。 - 前記制御部は、前記視聴期限情報に設定された視聴期限が形式的に設定されている場合には、当該コンテンツの視聴期限が前記視聴期限情報に設定されていないものとして扱う
ことを特徴とする請求項1記載の再生端末。 - コンテンツサーバからコンテンツと当該コンテンツの視聴期限情報とを受信し、当該コンテンツを再生する再生端末であって、
前記コンテンツを格納するコンテンツ格納部と、
前記視聴期限情報を格納する視聴期限情報格納部と、
時刻情報を管理する時計部と、
前記時計部の時刻設定の入力を受け付ける時計設定指示部と、
前記時計設定指示部で受けた更新すべき時刻が、(1)前記視聴期限情報格納部に格納されている視聴期限情報に設定された時刻の間に含まれており、かつ、前記時計部で管理している現在時刻との差が所定の範囲内である場合か、または、(2)前記コンテンツ格納部に格納されたコンテンツに対応した視聴期限情報が前記視聴期限情報格納部に格納されていない場合には、前記時計設定指示部で受け付けた時刻で前記時計部の時刻情報を更新するように制御する制御部と
を備えることを特徴とする再生端末。 - 再生端末における時刻の管理方法であって、
コンテンツサーバからコンテンツと当該コンテンツの視聴期限情報とを受信し、
当該コンテンツと当該視聴期限情報とを格納部に格納し、
時刻情報を管理し、
前記格納部に格納されたコンテンツに対応した視聴期限情報が格納されている場合には、時刻設定の指示を受け付けないか、または、時刻設定の指示を受け付けても、時刻情報を更新しないように制御する
ことを特徴とする時刻の管理方法。 - 前記時刻情報を制御する際、
前記視聴期限情報が形式的に設定されている場合には、当該コンテンツの視聴期限情報が存在しないものとして扱う
ことを特徴とする請求項4記載の時刻の管理方法。 - 再生端末における時刻の管理方法であって、
コンテンツサーバからコンテンツと当該コンテンツの視聴期限情報とを受信し、
当該コンテンツと当該視聴期限情報とを格納部に格納し、
時刻情報を管理し、
時計設定の指示により指定された更新すべき時刻が、(1)前記視聴期限情報に設定された時刻の間に含まれており、かつ、現在時刻との差が所定の範囲内である場合か、または、(2)前記格納部に格納されたコンテンツに対応した視聴期限情報が格納されていない場合には、前記更新すべき時刻で、現在時刻を更新する
ことを特徴とする時刻の管理方法。 - コンテンツサーバと再生端末とからなるコンテンツの再生システムにおいて、
前記コンテンツサーバは、
コンテンツと当該コンテンツに関する視聴期限情報とを格納する格納部と、
前記再生端末からの要求を受けて、前記コンテンツ及び当該コンテンツの視聴期限情報とを送信する送信手段とを備え、
前記再生端末は、
前記コンテンツサーバから前記コンテンツと当該コンテンツの視聴期限情報とを受信する受信手段と、
前記コンテンツを格納するコンテンツ格納部と、
前記視聴期限情報を格納する視聴期限情報格納部と、
時刻情報を管理する時計部と、
前記時計部の時刻設定の入力を受け付ける時計設定指示部と、
前記コンテンツ格納部に格納されたコンテンツに対応した視聴期限情報が前記視聴期限情報格納部に格納されている場合には、前記時計設定指示部の入力を受け付けないか、または、前記時計設定指示部で受け付けた時刻では前記時計部の時刻情報を更新しないように制御する制御部と
を備えることを特徴とするコンテンツの再生システム。 - 前記再生端末における前記制御部は、前記視聴期限情報に設定された視聴期限が形式的に設定されている場合には、当該コンテンツの視聴期限が前記視聴期限情報に設定されていないものとして扱う
ことを特徴とする請求項7記載の再生システム。 - コンテンツサーバと再生端末とからなるコンテンツの再生システムにおいて、
前記コンテンツサーバは、
コンテンツと当該コンテンツに関する視聴期限情報とを格納する格納部と、
前記再生端末からの要求を受けて、前記コンテンツ及び当該コンテンツの視聴期限情報とを送信する送信手段とを備え、
前記再生端末は、
前記コンテンツサーバから前記コンテンツと当該コンテンツの視聴期限情報とを受信する受信手段と、
前記コンテンツを格納するコンテンツ格納部と、
前記視聴期限情報を格納する視聴期限情報格納部と、
時刻情報を管理する時計部と、
前記時計部の時刻設定の入力を受け付ける時計設定指示部と、
前記時計設定指示部で受けた更新すべき時刻が、(1)前記視聴期限情報格納部に格納されている視聴期限情報に設定された時刻の間に含まれており、かつ、前記時計部で管理している現在時刻との差が所定の範囲内である場合か、または、(2)前記コンテンツ格納部に格納されたコンテンツに対応した視聴期限情報が前記視聴期限情報格納部に格納されていない場合には、前記時計設定指示部で受け付けた時刻で前記時計部の時刻情報を更新するように制御する制御部と
を備えることを特徴とするコンテンツの再生システム。
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