CN101443764A - 搜索版权对象的方法和设备及其映射方法和映射设备 - Google Patents
搜索版权对象的方法和设备及其映射方法和映射设备 Download PDFInfo
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Abstract
提供一种用于搜索版权对象的方法和设备以及用于搜索版权对象的映射方法和映射设备。用于搜索版权对象的设备包括:发送/接收单元,将版权对象标识符、内容标识符列表和版权对象中的至少一个发送给便携式存储装置;和搜索单元,利用内容标识符作为搜索关键字,从位于便携式存储装置中的映射信息搜索与该内容标识符对应的版权对象标识符,并且检索存储在与搜索到的版权对象标识符对应的版权槽中的版权对象,其中,所述映射信息存储有与来自内容标识符列表的内容标识符映射的版权对象标识符。
Description
技术领域
本发明涉及一种用于搜索版权对象的方法和设备及用于搜索版权对象的映射方法和映射设备,更具体地讲,涉及这样一种用于搜索版权对象的方法和设备及用于搜索版权对象的映射方法和映射设备,其中,版权对象ID和内容ID被映射并被管理以提高版权对象的搜索效率。
背景技术
近来,数字版权管理(以下,称为“DRM”)已被积极地研究,利用DRM的商业服务已经被实现或者将要被实现。DRM是一种保护可不经允许而被容易地复制和分发的数字内容的技术概念。
尽管已做出努力以保护数字内容,但是传统的数字内容保护主要集中于防止对数字内容的未授权的访问。具体地讲,仅允许付费的那些人访问数字内容,而拒绝没有付费的人访问数字内容。然而,由于数字数据的特性,数字内容很容易被复制、再使用、处理和分发给第三方。
因此,当已付费的人访问数字内容并故意将其分发给第三方时,第三方在不付费的情况下就可使用该数字内容,这产生了许多问题。为了解决这些问题,在DRM中,数字内容被加密并被分发,并且为了使用加密的数字内容,需要被称为版权对象(rights object,RO)的专用许可证。
然而,存储在主机装置中的版权对象可被容易地转移和复制到便携式存储装置上。克服诸如硬盘和致密盘的传统存储装置的局限,诸如XD卡和多媒体卡的便携式存储装置除了数据存储之外,还可进行数据控制和计算功能,这些便携式存储装置可容易地与诸如移动电话、计算机和数码相机的主机装置连接和断开连接。此外,正在开发与上述便携式存储装置一起使用的具有安全功能的新的便携式存储装置,其中,可通过在传输和存储期间保护内容来保护受版权保护的数字内容。相应地,可实现便携式存储装置和主机装置之间的DRM。即,版权对象可被存储在便携式存储装置中,主机装置可利用存储在便携式存储装置中的版权对象来再生加密的数字内容。
图1是安装传统的版权对象的方法的概念图。
主机装置向便携式存储装置发送版权对象标识符(RID)以存储版权对象(S11)。RID通常包含在版权对象中并用作版权对象的唯一标识符。
在接收到RID之后,便携式存储装置分配版权槽(rights slot)并向主机装置发送响应(S13)。然后,主机装置将版权对象发送给便携式存储装置(S15)。
之后,便携式存储装置以RID作为搜索关键字来将版权对象存储在分配的版权槽中(S17)。这里,RID被用作用于为版权对象分配存储空间的唯一标识符。当RID被用作搜索关键字时,具有20字节的特定长度的散列值或者特定附着字符串的值被用作搜索关键字。
同时,主机装置可使用内容标识符(CID)或RID来搜索存储在传统便携式存储装置中的相应版权对象。CID通常包含在版权对象中并用作内容的唯一标识符。
在利用版权对象标识符执行搜索的情况下,主机装置搜索与版权对象标识符对应的存储空间,以检索存储在所搜索的存储空间中的版权对象。
在利用内容标识符执行搜索的情况下,主机装置在所有的版权对象中搜索内容标识符,以检索与该内容标识符对应的版权对象。
发明内容
技术问题
因此,当利用内容标识符搜索版权对象时,必须以比较的方式解析并搜索版权对象中的内容标识符。结果,解析成本增加并且搜索速度降低。此外,由于延迟的响应时间,在实时再生内容方面存在问题。
技术解决方案
本发明的示例性实施例克服上述缺点以及上面没有描述的其他缺点。此外,本发明不需要克服上述缺点,本发明的示例性实施例可不克服上述任何问题。本发明提供一种用于搜索版权对象的方法和设备以及用于搜索版权对象的映射方法和映射设备,以便有效地搜索版权对象。
根据本发明的一方面,提供一种用于搜索版权对象的设备,该设备包括:发送/接收单元,将版权对象标识符、内容标识符列表和版权对象中的至少一个发送给便携式存储装置;和搜索单元,利用内容标识符作为搜索关键字,从位于便携式存储装置中的映射信息搜索与该内容标识符对应的版权对象标识符,并且检索存储在与搜索到的版权对象标识符对应的版权槽中的版权对象,其中,所述映射信息存储有与来自内容标识符列表的内容标识符映射的版权对象标识符。
根据本发明的另一方面,提供一种用于搜索版权对象的映射设备,该设备包括:发送/接收单元,从主机装置接收版权对象标识符、内容标识符列表和版权对象中的至少一个;和映射单元,利用来自内容标识符列表的内容标识符作为搜索关键字来映射内容标识符和版权对象标识符以使其彼此对应。
根据本发明的另一方面,提供一种搜索版权对象的方法,该方法包括:将版权对象标识符、内容标识符列表和版权对象中的至少一个发送给便携式存储装置;和利用内容标识符作为搜索关键字,从位于便携式存储装置中的映射信息搜索与该内容标识符对应的版权对象标识符,并且检索存储在与搜索到的版权对象标识符对应的版权槽中的版权对象,其中,所述映射信息存储有与来自内容标识符列表的内容标识符映射的版权对象标识符。
根据本发明的另一方面,提供一种用于搜索版权对象的映射方法,该方法包括:从主机装置接收版权对象标识符、内容标识符列表和版权对象中的至少一个;和利用来自内容标识符列表的内容标识符作为搜索关键字来映射内容标识符和版权对象标识符以使其彼此对应。
附图说明
通过参照附图对本发明示例性实施例进行详细描述,本发明的上述和其他方面和特点将变得更加清楚,其中:
图1是安装传统的版权对象的方法的概念图;
图2是示出根据本发明示例性实施例的映射并存储版权对象标识符和内容标识符的方法的流程图;
图3示出根据本发明示例性实施例的内容标识符列表的示例;
图4示出根据本发明示例性实施例的映射的内容标识符和版权对象标识符的映射信息;
图5是示出根据本发明示例性实施例的利用版权对象标识符和内容标识符的映射信息搜索版权对象的概念图;
图6是根据本发明示例性实施例的搜索版权对象的方法的流程图;
图7是根据本发明示例性实施例的用于搜索版权对象的设备的框图;
图8是根据本发明示例性实施例的用于搜索版权对象的映射设备的框图。
具体实施方式
通过参照下面对示例性优选实施例的详细描述以及附图,本发明的各个方面和特点及实现其的方法可更容易理解。然而,本发明可以以许多不同的形式实施,而不应被解释为限于这里所阐述的示例性实施例。相反,提供这些示例性实施例是为了本公开将彻底和完整,并将向本领域技术人员充分传达本发明的构思,本发明由权利要求限定。贯穿说明书,相同的标号指代相同的部件。
以下将参照附图详细描述本发明。
首先,将简要描述这里所使用的术语。然而,提供术语的描述是为了更好地理解本发明,应该注意的是,该描述不是为了限制本发明技术精神的范围。
版权对象
版权对象指的是具有使用加密的内容的授权的一种许可证。这样的授权包括播放、显示、运行、打印、导出(复制/转移)和读取。版权对象可以通过各种方法和语言,如XML、WBXML和二进制格式来举例。在本发明中,例如,版权对象可以是通过开放移动联盟数字版权管理(OMA DRM)定义的版权对象,但是本发明不限于此。
便携式存储装置
本发明中使用的便携式存储装置包括例如具有可读、可写和可擦除特性的非易失性存储器(如闪存),具有特定的数据操作,并且是能够与主机装置连接和断开连接的存储装置。这样的存储装置的示例包括智能媒体、记忆棒、致密闪速(CF)卡、XD卡和多媒体卡。在本发明中,便携式存储装置可以是具有特定的安全功能的多媒体卡。
主机装置
本发明中使用的主机装置指的是能够连接到便携式存储装置并通过存储在便携式存储装置中的版权对象来再生加密的内容的多媒体装置。这样的主机装置的示例包括诸如移动电话、PDA和MP3播放器的便携式装置以及诸如桌上型计算机和数字TV的非便携式装置。
图2是示出根据本发明示例性实施例的映射并存储版权对象标识符和内容标识符的方法的流程图。
主机装置将版权对象标识符(RID)发送给便携式存储装置以便存储版权对象(操作S201)。版权对象标识符通常包含在版权对象中并且用作版权对象的唯一标识符。
在接收到版权对象标识符之后,便携式存储装置分配版权槽(rights slot)并向主机装置发送响应(操作S211)。这里,版权槽可通过版权对象标识符来区分。
然后,主机装置产生内容标识符列表(LCID)并将其发送给便携式存储装置(操作S221)。图3示出内容标识符列表的示例。
接下来,便携式存储装置对内容标识符和版权对象标识符进行映射和存储(操作S231)。这里,可利用来自内容标识符列表的内容标识符作为搜索关键字来映射内容标识符和版权对象标识符。如果存在关于先前映射的内容标识符和版权对象标识符的映射信息,则可使用内容标识符列表来更新该映射信息。图4示出映射的内容标识符和版权对象标识符的示例。
接下来,主机装置将版权对象发送给便携式存储装置(操作S241)。
然后,便携式存储装置通过使用版权对象标识符作为搜索关键字来将版权对象存储在版权槽中(S251)。这里,如果版权对象标识符被用作搜索关键字,则可从与该版权对象标识符对应的版权槽检索版权对象。图3至图6示出了搜索版权对象的方法。
在上文中,版权对象标识符、内容标识符列表和版权对象可一次全部被发送给便携式存储装置,或者可被划分并在两次以上的传输中被发送。这里,传输时间不限于任何特定时间点。
图3示出根据本发明示例性实施例的内容标识符列表的示例,图4示出根据本发明示例性实施例的映射的内容标识符和版权对象标识符的映射信息。
如图3中所示,内容标识符列表300包括多个内容标识符302。
如图4中所示,在接收到内容标识符列表300之后,便携式存储装置创建与来自内容标识符列表300的内容标识符映射的版权对象的映射信息。
这里,如图4中所示,从主机装置接收的版权对象标识符“RID #1”404可被映射到来自内容标识符列表300的多个内容标识符。另一方面,内容标识符可映射到多个版权对象标识符。例如,内容标识符“CID #1”402可映射到版权对象标识符RID #1 404和版权对象标识符“RID #2”406。在这种情况下,可允许若干用户经多个版权对象使用同一内容。
如果便携式存储装置已经存储有内容标识符和版权对象标识符的映射信息,则接收的内容标识符列表300可用于更新该映射信息。例如,当便携式存储装置从主机装置接收到版权对象标识符“RID #N”和内容标识符列表,并且版权对象标识符“RID #N”将映射到来自接收的内容标识符列表的内容标识符“CID #M”,而在便携式存储装置中已经存储的映射信息中,该内容标识符“CID #M”已经映射到“RID #N-1”时,该内容标识符CID#M被映射到版权对象标识符RID #N和RID #N-1二者,从而更新了映射信息。相应地,当从映射到同一内容标识符的多个版权对象标识符中选择一个版权对象标识符时,存储在与选择的版权对象标识符对应的版权槽中的版权对象可被自动检索。根据本发明,可提供可使用户能够直接选择(版权对象标识符)的用户界面。
以下,将参照图5所示的概念图详细描述本发明。
图5是示出根据本发明示例性实施例的利用版权对象标识符和内容标识符的映射信息搜索版权对象的概念图。
版权对象标识符和内容标识符的映射信息510被存储在便携式存储装置中。针对版权对象标识符和内容标识符的映射信息,可参考图4。与版权对象标识符对应的版权对象被分别存储在版权槽513、515和517中。这里,版权槽513、515和517可通过用作版权槽的唯一标识符的版权对象标识符来区分。
主机装置可使用版权对象标识符和内容标识符来搜索版权对象,搜索到的版权对象被用于访问内容。
在使用版权对象标识符来搜索版权对象的情况下,主机装置使用版权对象标识符作为搜索关键字来从与该版权对象标识符对应的版权槽检索版权对象。例如,主机装置可使用版权对象标识符RID #1 404作为搜索关键字,从与版权对象标识符RID #1 404对应的版权槽513检索版权对象“A”502。
在使用内容标识符来搜索版权对象的情况下,主机装置从映射信息510中搜索映射到该内容标识符的版权对象标识符。例如,主机装置可使用内容标识符CID #1 402作为搜索关键字来从映射信息510中搜索与内容标识符CID #1 402对应的版权对象标识符。如果搜索到的版权对象标识符为RID #2406,则主机装置检索存储在与版权对象标识符RID #2 406对应的版权槽515中的版权对象“B”504。
传统上,当使用内容标识符来搜索版权对象时,所有版权对象中的内容标识符都必须被搜索,这使处理效率低。此外,从XML或WBXML格式的版权对象中搜索内容标识符由于解析过程而带来负担。然而,效率低的传统版权对象搜索方法可通过产生内容标识符列表并将其发送给便携式存储装置并且对内容标识符列表与版权对象标识符进行映射和存储来改进。这使得能够在不进行上述解析版权对象的情况下利用来自映射信息的内容标识符搜索版权对象标识符,并且利用搜索到的版权对象标识符检索相应的版权对象。
图6是根据本发明示例性实施例的搜索版权对象的方法的流程图。
首先,利用内容标识符,主机装置从映射信息搜索相应的内容标识符和版权对象标识符(操作S601)。
然后,搜索与搜索到的版权对象标识符对应的版权槽(操作S611)。
接下来,从搜索到的版权槽检索版权对象(操作621)。详细内容可参考图3至图5。
图7是根据本发明示例性实施例的用于搜索版权对象的设备700的框图。
设备700包括发送/接收单元710和搜索单元720,并且可被设置在主机装置中。
发送/接收单元710在主机装置和便携式存储装置之间发送和接收数据,并且可将版权对象标识符、内容标识符列表和版权对象发送给便携式存储装置。这里,版权对象标识符、内容标识符列表和版权对象可被一次全部发送,或者可被分两次以上发送。传输时间不限于任何特定的时间点。发送/接收单元710可包括接口单元(未示出)。该接口单元使主机装置能够连接到便携式存储装置。
搜索单元720利用版权对象标识符或内容标识符来搜索存储在便携式存储装置中的版权对象,并经发送/接收单元710检索搜索到的版权对象。在利用内容标识符搜索版权对象的情况下,搜索单元720搜索映射到该内容标识符的版权对象标识符,并利用搜索到的版权对象标识符作为搜索关键字来检索与该版权对象标识符对应的版权对象。类似地,利用内容标识符作为关键字,可从映射信息搜索相应的版权对象标识符,并利用搜索到的版权对象标识符作为搜索关键字检索存储在版权槽中的版权对象。在内容标识符映射到多个版权对象标识符时,可选择一个版权对象标识符。详细内容可参考图2至图6。
图8是根据本发明示例性实施例的用于搜索版权对象的映射设备800的框图。
映射设备800包括发送/接收单元810、映射单元820和存储单元830,并且可被设置在便携式存储装置中。
发送/接收单元810在主机装置和便携式存储装置之间发送和接收数据。即,发送/接收单元810可从主机装置接收版权对象标识符、内容标识符列表和版权对象,以及向主机装置发送版权对象和响应消息。
映射单元820将内容标识符与版权对象标识符映射。即,当从主机装置接收到内容标识符列表时,映射单元820将版权对象标识符与来自内容标识符列表的内容标识符映射以使其彼此对应。这里,内容标识符可用作搜索关键字。如果便携式存储装置已经存储有内容标识符和版权对象标识符的映射信息,则可通过接收内容标识符列表来更新该映射信息。可通过各种映射方法来映射内容标识符和版权对象标识符,本发明不限于任何一种方法。与版权对象标识符映射的内容标识符的映射信息可以以数据库格式存储。
存储单元830存储与版权对象标识符映射的内容标识符的映射信息。此外,存储单元830利用版权对象标识符作为搜索关键字来将与版权对象标识符对应的版权对象存储在版权槽中。如上面已经描述的,存储在存储单元830中的映射信息和版权对象可被更新。详细内容可参考图2至图6。
图7和图8所示的每一部件可以以不同的构造来实现,这取决于实现该部件的方法。例如,搜索单元720可被设置在映射设备800中。在该构造中,映射设备800执行搜索单元720的操作。
此外,图7和图8中所示的每一部件可用模块来实现。如这里所使用的,“模块”指的是执行预定功能的软件元件或硬件部件,如现场可编程门阵列(FPGA)或专用集成电路(ASIC)。然而,单元或模块不总是具有限于软件或硬件的含义。模块可被构造为被存储在可寻址存储介质中或者运行一个或多个处理器。因此,模块包括例如软件元件、面向对象的软件元件、类元件或任务元件、进程、函数、属性、过程、子进程、程序代码段、驱动器、固件、微码、电路、数据、数据库、数据结构、表、数组和参数。由模块提供的功能和元件可被结合为更少的元件或模块,或者被划分为更多的元件或模块。
产业上的可利用性
如上所述的根据本发明示例性实施例的用于搜索版权对象的方法和设备及用于搜索版权对象的映射方法和映射设备可提供下面的优点。
可利用内容标识符有效地搜索版权对象,并且内容可被实时再生的比率可提高。
尽管已参照本发明的示例性实施例具体地显示和描述了本发明,但是本领域普通技术人员应该理解,在不脱离由权利要求限定的本发明的精神和范围的情况下,可进行各种形式和细节上的改变。示例性实施例应该被认为是描述性的,而不是为了限制的目的。
Claims (14)
1、一种用于搜索版权对象的设备,该设备包括:
发送/接收单元,将版权对象标识符、内容标识符列表和版权对象中的至少一个发送给便携式存储装置;和
搜索单元,利用内容标识符作为搜索关键字,从位于便携式存储装置中的映射信息搜索与该内容标识符对应的版权对象标识符,并且检索存储在与搜索到的版权对象标识符对应的版权槽中的版权对象,其中,所述映射信息存储有与来自内容标识符列表的内容标识符映射的版权对象标识符。
2、根据权利要求1所述的设备,其中,版权对象标识符、内容标识符列表和版权对象可一次全部被发送给便携式存储装置,或者可被划分并通过两次以上的传输被发送。
3、根据权利要求1所述的设备,其中,如果利用版权对象标识符作为搜索关键字来检索版权对象,则搜索单元从与该版权对象标识符对应的版权槽搜索和检索版权对象。
4、根据权利要求1所述的设备,其中,如果多个版权对象标识符被映射到内容标识符,则搜索单元选择一个版权对象标识符。
5、一种用于搜索版权对象的映射设备,该设备包括:
发送/接收单元,从主机装置接收版权对象标识符、内容标识符列表和版权对象中的至少一个;和
映射单元,利用来自内容标识符列表的内容标识符作为搜索关键字来映射内容标识符和版权对象标识符以使其彼此对应。
6、根据权利要求5所述的映射设备,其中,利用版权对象标识符作为搜索关键字将版权对象存储在版权槽中。
7、根据权利要求5所述的映射设备,其中,映射信息和版权对象根据从主机装置接收的版权对象标识符、内容标识符列表和版权对象而被更新。
8、一种搜索版权对象的方法,该方法包括:
将版权对象标识符、内容标识符列表和版权对象中的至少一个发送给便携式存储装置;和
利用内容标识符作为搜索关键字,从位于便携式存储装置中的映射信息搜索与该内容标识符对应的版权对象标识符,并且检索存储在与搜索到的版权对象标识符对应的版权槽中的版权对象,其中,所述映射信息存储有与来自内容标识符列表的内容标识符映射的版权对象标识符。
9、根据权利要求8所述的方法,其中,版权对象标识符、内容标识符列表和版权对象可一次全部被发送给便携式存储装置,或者可被划分并通过两次以上的传输被发送。
10、根据权利要求8所述的方法,其中,如果利用版权对象标识符作为搜索关键字来检索版权对象,则检索版权对象的步骤包括:从与该版权对象标识符对应的版权槽搜索和检索版权对象。
11、根据权利要求8所述的方法,其中,如果多个版权对象标识符被映射到内容标识符,则检索版权对象的步骤包括:选择一个版权对象标识符。
12、一种用于搜索版权对象的映射方法,该方法包括:
从主机装置接收版权对象标识符、内容标识符列表和版权对象中的至少一个;和
利用来自内容标识符列表的内容标识符作为搜索关键字来映射内容标识符和版权对象标识符以使其彼此对应,从而产生映射信息。
13、根据权利要求12所述的映射方法,还包括:利用版权对象标识符作为搜索关键字将版权对象存储在版权槽中。
14、根据权利要求12所述的映射方法,还包括:根据从主机装置接收的版权对象标识符、内容标识符列表和版权对象来更新映射信息和版权对象。
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CN109074457A (zh) * | 2016-04-04 | 2018-12-21 | 三菱电机株式会社 | 进程搜索装置和进程搜索程序 |
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