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CN100459699C - System and method for home network content protection and copy management - Google Patents

System and method for home network content protection and copy management Download PDF

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CN100459699C
CN100459699C CNB2003801064195A CN200380106419A CN100459699C CN 100459699 C CN100459699 C CN 100459699C CN B2003801064195 A CNB2003801064195 A CN B2003801064195A CN 200380106419 A CN200380106419 A CN 200380106419A CN 100459699 C CN100459699 C CN 100459699C
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content
bound
network
discrete
home entertainment
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CN1754387A (en
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B·拉坎普
M·辛格
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Sony Pictures Entertainment Inc
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Abstract

A private home entertainment system that includes multiple playback devices may receive discrete content that is played by publicly available devices how appropriate. The home system converts discrete content into content bound to the private network using, for example, a key. Bound content can be freely copied and played on devices within the private network, but cannot be played outside the private network. If the user chooses to convert the bound content to discrete content to allow the content to be played outside the network, all copies within the network are destroyed or placed in an unavailable state.

Description

用于家庭网络内容保护以及复制管理的系统和方法 Systems and methods for home network content protection and copy management

发明领域field of invention

本发明通常涉及内容保护和复制管理。The present invention generally relates to content protection and copy management.

发明背景Background of the invention

数字视频和音乐的优点很多，但由于其是数字化的，一个明显的缺点就是其内容相对来说更容易被完整地复制，而不需要版权所有者的授权。这些复制品可由数字音频和视频内容组成，其以诸如数字通用盘(DVD)这样的介质形式提供给家庭内部的用户。实际上，盗版者广泛的复制使内容所有者每年损失数十亿美元。所以，本发明认识到限制数字音频和视频的非法复制的迫切性。因此，已经提出许多复制保护方案用来防止对售卖的CD或DVD进行非法复制。The advantages of digital video and music are many, but because they are digitized, an obvious disadvantage is that their content is relatively easy to be completely copied without the authorization of the copyright owner. These copies may consist of digital audio and video content provided to users within the home on media such as Digital Versatile Discs (DVDs). In fact, widespread copying by pirates costs content owners billions of dollars each year. Therefore, the present invention recognizes the urgency to limit the illegal copying of digital audio and video. Therefore, many copy protection schemes have been proposed to prevent illegal copying of sold CDs or DVDs.

尽管如此，由于许多数字内容的购买者希望进行复制用于个人使用，这使问题变得复杂。例如，一个DVD电影的购买者可能具有一个家庭娱乐网络，该网络可能包括多个DVD播放机、个人录影机(PVR)和其它诸如个人计算机(PC)、个人数字助理(PDA)的计算装置，购买者可能希望在任何时间都可以用这些装置播放其所购买的内容。在这些情况下，购买者可能更喜欢通过数字信道访问和复制该内容，而不是将购买的DVD传输到每个装置。而且，一些网络装置可能不会配置成用于接收DVD或者具有所购买的内容的其它介质格式。假设能够建立适当的控制，内容提供者通常并不反对这样的复制，因为这对那些已经准备购买该内容并且仅希望自娱自乐的购买者而言仅仅是一个便利。Nevertheless, the issue is complicated by the fact that many buyers of digital content wish to make copies for personal use. For example, a buyer of a DVD movie may have a home entertainment network that may include multiple DVD players, personal video recorders (PVRs) and other computing devices such as personal computers (PCs), personal digital assistants (PDAs), Buyers may wish to be able to play their purchased content on these devices at any time. In these cases, the purchaser may prefer to access and copy the content through a digital channel rather than transferring the purchased DVD to each device. Also, some network devices may not be configured to receive DVDs or other media formats with purchased content. Assuming proper controls can be established, content providers generally have no objection to such duplication, as it is merely a convenience to those buyers who are already prepared to purchase the content and wish only to entertain themselves.

但正如以上提到的，如果允许这样的功能而不加以约束，不道德的购买者就可以打开他们的家庭网络给未授权的用户或者制作该内容的盗版拷贝，然后他们就可以将这些拷贝卖掉或者分发，这就剥夺了版权所有者的利益。本发明正是考虑到以上严重的问题而提出的。But as mentioned above, if such functionality is allowed without restriction, unscrupulous buyers can open up their home network to unauthorized users or make pirated copies of the content, which they can then sell Disposal or distribution, which deprives the copyright owner of the benefits. The present invention is proposed in consideration of the serious problems above.

发明概要Summary of the invention

一种用于在私人家庭娱乐网络中的内容保护方法，该网络具有多个重放装置，所述方法包括：从一个内容源接收离散的内容(discrete content)。该离散内容的特征是可以在任何符合该离散格式的重放装置上播放，包括在特定的私人家庭娱乐网络之外的重放装置。该方法还包括：将该离散的内容引入到一个特定的私人家庭网络中以便该内容的离散特性失效，并且在该私人家庭网络中出现该内容的一个“绑定(bound)”版本。绑定内容的特征是仅可以在作为该私人家庭娱乐网络的合法成员的重放装置上播放。A method for content protection in a private home entertainment network having multiple playback devices, the method includes receiving discrete content from a content source. The discrete content is characterized as playable on any playback device conforming to the discrete format, including playback devices outside of a particular private home entertainment network. The method also includes introducing the discrete content into a particular private home network such that the discrete nature of the content is disabled and a "bound" version of the content appears in the private home network. A feature of bundled content is that it can only be played on playback devices that are legal members of the private home entertainment network.

更好地，该方法还包括允许该私人娱乐网络的用户将该绑定内容转换回离散内容，以允许该内容回到独立于网络的状态。当这些被实现时，该方法使该私人家庭娱乐网络上的相应绑定内容的所有副本变得不可使用，例如通过从网络中删除访问该内容的授权等方式。在一个非限制性的实施例中，通过使用至少一个与该私人家庭娱乐网络相关的密钥来加密该离散的内容而使该离散的内容变成绑定内容。Preferably, the method further includes allowing a user of the private entertainment network to convert the bound content back to discrete content to allow the content to return to a network-independent state. When this is accomplished, the method renders all copies of the corresponding bundled content on the private home entertainment network unusable, such as by removing authorization to access the content from the network. In one non-limiting embodiment, the discrete content becomes bound content by encrypting the discrete content using at least one key associated with the private home entertainment network.

另一方面，一种用于在具有多个重放装置的家庭娱乐网络中进行内容保护的系统，其包括一个用于从内容源接收离散内容的装置，和用于使用至少一个与家庭娱乐网络相关的密钥来加密该内容以使其变为绑定内容的装置，该绑定内容被绑定到该家庭娱乐网络。此外，该系统还包括用于在该家庭娱乐网络中存储该绑定内容的装置。提供这些装置使所有网络装置可重放该绑定内容。此外，该系统还包括用于允许用户将该内容移动到一个离散介质上的装置，该介质未绑定至该网络，并且，如果用户将该内容移动到离散介质上，就使在网络中的该内容的所有绑定副本变得不可使用。In another aspect, a system for content protection in a home entertainment network having a plurality of playback devices includes a means for receiving discrete content from a content source, and for using at least one The associated key is used to encrypt the content so that it becomes a device that binds the content, which is bound to the home entertainment network. Additionally, the system includes means for storing the bundled content in the home entertainment network. These means are provided so that all network devices can replay the bundled content. Additionally, the system includes means for allowing the user to move the content to a discrete medium that is not bound to the network and, if the user moves the content to the discrete medium, enables All bound copies of the content become unusable.

再一个方面，一种家庭娱乐系统包括在一个私人网络中通信的多个重放装置。处理器执行逻辑处理以允许用户在任何重放装置上播放离散内容，但不能复制该内容。该逻辑处理也允许用户将离散内容转换为绑定内容并产生该绑定内容的至少N个副本，其中N≥1。在该方面中，离散内容的特征是可在该私人网络之内或之外的授权装置中播放，并且绑定内容的特征是仅能在该网络之内的重放装置上重放。In yet another aspect, a home entertainment system includes a plurality of playback devices communicating in a private network. The processor executes logic to allow the user to play the discrete content on any playback device, but not to copy the content. The logical process also allows the user to convert the discrete content into the bound content and generate at least N copies of the bound content, where N≧1. In this aspect, discrete content is characterized as being playable on authorized devices within or outside the private network, and bound content is characterized as being playable only on playback devices within the network.

有关本发明结构和操作过程的详细内容都可以参考附图得到最好的理解，其中相同的附图标记表示同一部分，其中：Details regarding the structure and operation of the present invention are best understood by reference to the accompanying drawings, in which like reference numerals indicate like parts, in which:

附图的简要说明Brief description of the drawings

图1是一个本家庭娱乐系统的结构框图；Fig. 1 is a structural block diagram of this home entertainment system;

图2是本发明总体逻辑处理的流程图；和Fig. 2 is the flow chart of overall logic processing of the present invention; With

图3是本逻辑处理的优选实施方式的流程图。Figure 3 is a flow diagram of a preferred embodiment of this logical process.

优选实施例的详细说明Detailed Description of the Preferred Embodiment

首先参考图1，一个或多个内容源10向一个私人家庭娱乐网络提供内容，通常如12所示，如此该内容可至少被自由复制“N”次，其中N≥1，并且在网络12内播放却不能将该内容副本以在网络12之外进行传送，除非网络12不再访问该内容。该内容通过传送路径14进行传送，传送路径可以是卫星、陆地或者互联网宽带(例如DirectTVTM或者MovieLinKTM)、点对点，或者作为适合的离散介质或者其它可移动的存储装置的传送装置，其与在此讨论的原理相适应。Referring first to FIG. 1, one or more content sources 10 provide content to a private home entertainment network, generally shown at 12, such that the content can be freely copied at least "N" times, where N > 1, and within the network 12 Players cannot copy the content for transmission outside the network 12 unless the network 12 no longer has access to the content. The content is delivered via delivery path 14, which may be satellite, terrestrial, or Internet broadband (such as DirectTV ™ or MovieLink ™ ), point-to-point, or delivery means as a suitable discrete medium or other removable storage device, which is compatible with the The rationale for this discussion fits in.

接收到时，该内容通常处于“离散”状态。在此使用的离散内容是独立于网络的，其可在网络和用户间移动(但不是复制)，如果被授权的话，只要该内容的离散版本不再是网络独立时，其就可以转为绑定状态。另一方面，“绑定”内容或介质被加密或被约束在一个并且仅仅是一个私人家庭娱乐网络中，使得仅能在该网络内的装置上播放。如果对于该网络保持绑定的状态，则绑定内容可在网络内部被复制，包括复制到物理介质上，并且在授权的情况下其能够转移为离散状态，在这时所有该绑定内容的网络副本都变为不可用的。但是，适合的网络装置也不能将处于可用状态的绑定内容传输到该网络外部。When received, this content is usually in a "discrete" state. Discrete content as used herein is network-independent, it can be moved (but not copied) between networks and users, and if authorized, it can be turned into a bundled version whenever the discrete version of the content is no longer network-independent fixed state. "Binded" content or media, on the other hand, is encrypted or bound within one and only one private home entertainment network so that it can only be played on devices within that network. If the bound state remains for the network, the bound content may be replicated within the network, including onto physical media, and where authorized it can be transferred to a discrete state, at which point all of the bound content Network replicas have become unavailable. However, suitable network devices are also unable to transmit binding content in an available state outside the network.

图1表示网络12可以包括多个网络装置，这些网络装置通过有线或无线网络路径相连接。“网络装置”指的是网络12的一个组成部分，其在逻辑上与其它家庭网络装置绑定在一起，这样一个装置上的绑定内容可被自由的复制到或者移动到该网络中的另一个装置，或在该网络的另一个装置上观看。FIG. 1 shows that network 12 may include a plurality of network devices connected by wired or wireless network paths. "Network device" refers to a component of the network 12, which is logically bound to other home network devices, so that the binding content on one device can be freely copied or moved to another home network device. device, or watch it on another device on the network.

更特别地，图1表示网络12可以包括一个家庭计算机服务器16，其根据在这里揭示的逻辑来发挥作用。如果希望的话，可以将服务器16的功能分散到如图1所示的一个或者多个其它的网络装置中。服务器16可以是任何合适的处理装置。More particularly, FIG. 1 shows that network 12 may include a home computer server 16 that functions in accordance with the logic disclosed herein. If desired, the functionality of server 16 may be distributed among one or more other network devices as shown in FIG. 1 . Server 16 may be any suitable processing device.

多个网络装置显示为与服务器16通信。例如，一个或多个具有相关的个人录影机(PVR)的接收器18能与服务器16通信，一个或多个个人计算机(PC)20也同样可以。并且，网络12可以包括一个或多个游戏控制台22，也可包括一个或多个数字视盘(DVD)播放器/记录器24。一个或多个便携式个人数字助理(PDA)26和一个或多个载体28也可以是网络12的成员，其服从以下提到的约束条件。一个包括更多网络装置的辅助驻留区30也可以是网络12的一部分。A number of network devices are shown in communication with server 16 . For example, one or more receivers 18 with associated personal video recorders (PVRs) can communicate with server 16, as can one or more personal computers (PCs) 20. Also, network 12 may include one or more game consoles 22 and may also include one or more digital video disk (DVD) players/recorders 24 . One or more portable personal digital assistants (PDAs) 26 and one or more carriers 28 may also be members of the network 12, subject to the constraints noted below. A sub-resident area 30 may also be part of the network 12 that includes further network devices.

网络12是私有的，也就是非网络装置不能访问网络12上的绑定内容。相应的，该网络12可以是与公网物理隔离的，或者其可以是一个虚拟专用网络，其根据现有技术已知的VPN原理，使用公网资源但不能让非网络装置访问。The network 12 is private, that is, non-network devices cannot access the bound content on the network 12 . Correspondingly, the network 12 may be physically isolated from the public network, or it may be a virtual private network, which uses public network resources but cannot be accessed by non-network devices according to VPN principles known in the art.

现在参考图2，可看到本发明的总体逻辑处理。由方块32开始，网络12被建立。使用现有技术中已知的认证原理来认证网络12的装置，成功认证后，它们成为该网络的成员。在授予了成员资格的基础上，随后定期在其它装置中提供一个装置，其具有可能是播放绑定内容所必需的密钥。例如，根据需要，网络上所有的装置可以共享一对公钥/私钥中的同一个私钥，或者使用其它加密原理。如果需要，每一个网络装置也可以具有其自己特有的密钥。Referring now to FIG. 2, the overall logical processing of the present invention can be seen. Beginning at block 32, the network 12 is established. Devices of the network 12 are authenticated using authentication principles known in the art, and upon successful authentication, they become members of the network. Upon granting membership, a device is then periodically provided among other devices with the keys that may be necessary to play the bound content. For example, all devices on the network may share the same private key of a public/private key pair, or use other encryption principles, as desired. Each network device may also have its own unique key, if desired.

在优选实施例中，授权装置的数量限制为一个预定的数目，例如15，以限制该网络被危及安全的风险。在网络12中仅用于播放的装置可以不计算在内。In a preferred embodiment, the number of authorized devices is limited to a predetermined number, eg 15, to limit the risk of the network being compromised. Devices that are used only for playback in the network 12 may not be counted.

诸如PDA之类的便携式网络装置26，只要用户没有以明确的方式使该装置与该网络断开连接，并且只要其在预定的时间周期内在服务器16上进行了登记，其就可以保持加入成为网络12的成员的状态，从而根据需要通过无线访问。否则，该装置将被认为断开连接并且其密钥超时。与网络12断开连接之后，该装置中绑定内容的任何副本都会变为不可用，实现方式例如为，确保在方块32上仅有合适的装置被认证，并且编程为在与网络断开连接后予以删除或擦除，或者使绑定内容不可用。密钥可不时地并在发生预定事件时(例如使装置断开连接或者使先前的绑定内容变为不可用)更新。Portable network devices 26, such as PDAs, may remain in the network as long as the user does not disconnect the device from the network in an explicit manner, and as long as it registers with the server 16 within a predetermined period of time. 12 member status, thus accessing via wireless as needed. Otherwise, the device will be considered disconnected and its key timed out. After disconnecting from the network 12, any copy of the bundled content on the device becomes unavailable, for example by ensuring that only suitable devices are authenticated at block 32 and programmed to be deleted or erased afterwards, or make the bound content unavailable. The key may be updated from time to time and upon the occurrence of predetermined events such as disconnecting the device or rendering previously bound content unavailable.

处理过程继续到方块34，离散内容由网络12按照以上描述的方式接收(例如由服务器16)，然后在方块36将其转换为绑定内容。作为一个非限制性的例子，可使用网络12的密钥对该离散内容进行加密，使得只有具有所述密钥的网络装置才能解密(以及播放)该内容。一旦其转换为绑定状态，则没有该离散内容的可用版本被保留下来。存在的任何副本都被删除或擦除，否则就被变为不可用。这样，例如，最初在一个盘片上接收离散内容时，该盘片必须易于改变，以使没有离散内容保留在该盘片上，或者如果其被保留下来，也被非网络装置修改为绑定内容，或者变为不可用。Processing continues at block 34 where discrete content is received by network 12 (eg, by server 16 ) in the manner described above, and is then converted at block 36 into bound content. As a non-limiting example, the discrete content may be encrypted using a key of the network 12 such that only network devices having the key can decrypt (and play) the content. Once it transitions to a bound state, no usable version of that discrete content is preserved. Any copies that exist are deleted or wiped, or rendered unusable. Thus, for example, when discrete content is initially received on a disc, the disc must be easily changed so that no discrete content remains on the disc, or if it is retained, is also modified to bound content by non-network devices, or become unavailable.

如果需要，当在一个盘片上接收到离散内容并且然后转换为绑定内容时，该盘片可以使用在美国专利号为6,104,677中阐述的标记原理进行可视标记，以指明其为绑定状态，该专利由现有的受让人所有并在此并入作为参考。同样，该盘片也可以使用以下进一步阐述的原理来标记，以指示其变回了离散状态。If desired, when discrete content is received on a disc and then converted to bound content, the disc may be visually marked to indicate its bound state using the marking principles set forth in U.S. Patent No. 6,104,677, This patent is owned by the present assignee and is hereby incorporated by reference. Likewise, the platter can also be marked to indicate that it has changed back to a discrete state, using the principles set forth further below.

方块38表示绑定内容可在该网络12内被四处移动和/或复制，包括在合适的物理介质上进行，以根据需要在用户所选择的网络设备上播放。Block 38 indicates that bundled content may be moved and/or copied around within the network 12, including on suitable physical media, for playback on a user-selected network device as desired.

当绑定内容经由网络移动时，其优选地是依照现有技术中已知的安全数据移动原理进行安全的移动。例如，请求该绑定内容的装置可以在播放期间解密该内容，而不保留该内容的任何非绑定的副本。该内容可使用网络连接进行移动，或者使用便携式网络装置，或者使用诸如索尼的记忆棒

Figure C20038010641900091
这样的特殊物理介质，该记忆棒(或者其内容)与该网络绑定在一起。When bound content is moved across the network, it is preferably moved securely in accordance with secure data movement principles known in the art. For example, a device requesting the bound content may decrypt the content during playback without retaining any non-bound copies of the content. The content can be moved using a network connection, or using a portable network device, or using a memory stick such as a Sony
Figure C20038010641900091
Such a special physical medium, the memory stick (or its contents) is bound to the network.

在方块40，用户可以决定解除该内容与网络12的绑定。为此，以例如下列方式转换绑定的副本，即，解密该内容并且在新的离散状态下重新加密，然后再复制到便携式盘片或者发送到网络外。通过删除、擦除或者诸如阻止访问等其它方式将网络12中的内容的所有绑定副本都被变为不可使用。At block 40, the user may decide to unbind the content from the network 12. To this end, the bound copy is transformed, for example, by decrypting the content and re-encrypting it in a new discrete state before being copied to a portable disc or sent out of the network. All bound copies of content in the network 12 are rendered unusable by deletion, erasure, or other means such as blocking access.

图3描述了一个以上讨论过的总体逻辑处理的特殊的非限制性的实施方式。由方块42开始，依照以上讨论的原理建立私人网络，装置的数目比较好的是不大于一个预定的数目“M”。在方块44，获得离散内容，并且在方块46将获得的内容添加到网络(更特别是加入到服务器16控制的存储器)，从而在下一步之前或者之后指明该绑定内容的一个“根”副本。Figure 3 depicts a particular non-limiting implementation of the general logic process discussed above. Beginning at block 42, a private network is established according to the principles discussed above, preferably with a number of devices no greater than a predetermined number "M". At block 44, the discrete content is obtained, and at block 46 the obtained content is added to the network (and more particularly to storage controlled by the server 16), thereby designating a "root" copy of the bound content before or after the next step.

在方块48，该根副本如上所述，以加密方式被绑定至网络12。该内容剩余的离散版本失效或者变为不可使用。继续到方块50，制作该绑定的根版本的副本，以满足支持来自图1所示的网络装置的播放请求的需要。At block 48, the root copy is cryptographically bound to the network 12 as described above. The remaining discrete versions of this content expire or become unavailable. Continuing to block 50, a copy of the root version of the binding is made as needed to support playback requests from the network device shown in FIG.

方块52表示如果用户希望使用例如盘片等将绑定至网络12的内容提供给一个在网络12外部的目标，那么用户就可以这样命令。作为响应，在方块54，所有绑定的副本都是无法观看的，并且该根版本被移动或者指定为磁盘记录机上的版本。在方块56，该内容依照上面的原理转换为离散状态，从而解除绑定，然后在方块58被复制到例如一个能在网络12外部传输的盘片上。包括该根版本的所有保留的绑定都被设置为不能为网络12上的装置所用。Block 52 shows that if the user wishes to provide content bound to the network 12 to a target outside the network 12 using, for example, a disc, the user can order so. In response, at block 54, all bound copies are unviewable, and the root version is moved or designated as the version on the disk recorder. At block 56, the content is converted to a discrete state according to the above principles, thereby unbound, and then copied at block 58 to, for example, a disc that can be transported outside the network 12. All reserved bindings including this root version are made unavailable to devices on the network 12 .

为了给出如何应用上述发明的两个例子，假设用户可从一个内容源下载一个可租用72小时的节目，在到达之后该用户被绑定至该网络。任何网络装置在租用期内都可以观看该内容，但是一旦观看期过去，所有的副本就都被变为不可用的，例如通过使所有来自网络的副本变为不可用。To give two examples of how the above invention can be applied, assume that a user can download a 72-hour rentable program from a content source, upon arrival the user is bound to the network. Any network device can view the content during the rental period, but once the viewing period has elapsed, all copies are made unavailable, for example by making all copies from the network unavailable.

作为另一个例子，假设离散内容被购买并被下载到在网络12中(例如在服务器16中)的固定的或者移动的介质上。一旦用户命令或者其自动地或者其它情况而进入绑定状态，该内容可按需要由任何网络装置访问和复制。如果用户选择保持该内容为离散状态，则复制是不允许的，但该内容可移动，例如通过将该内容放置在一个可移动的介质上，并且在网络装置之间传送存储装置以根据用户需要顺序播放。As another example, assume that discrete content is purchased and downloaded to fixed or removable media in network 12 (eg, in server 16). Once entered into the bound state by user command or automatically or otherwise, the content can be accessed and copied by any network device as desired. If the user chooses to keep the content discrete, copying is not permitted, but the content can be moved, for example by placing the content on a removable medium and transferring the storage between network devices to accommodate user needs play in order.

在此表示的和详细描述的具体的用于家庭网络内容保护和复制管理的系统和方法，虽然完全能够解决本发明上述要达到的目的，但是应当明白，其是本发明现有的优选实施例，并且其只代表更为宽泛的本发明的主题，本发明的范围还包括其它对本领域技术人员可能是明显的实施例，只有所附权利要求能够概括本发明的范围，其中单数元件的标记并不意味着“一个且仅有一个”的意思，而应认为“一个或者多个”，除非有明确的规定。所有上述优选实施例中描述的元素的结构性或功能性的等价物对那些本领域的普通技术人员是已知的，或者随后将成为已知的，这些等价物被清楚的合并在其中进行引用，并且包括在本权利要求中。此外，没有必要详细描述每一个装置或方法以及本发明可以解决的所有问题，因为它们都将包括在本权利要求中。而且，不会在不考虑权利要求中是否清楚引用了所述元件、组成或方法步骤的情况下向公众公开所述元件、组成或方法步骤。在这里所要求的元件不会依照35 U.S.C.§112第6段的规定进行解释，除非该元件使用“用于……的装置”的短语进行清楚的表述，或者在方法权利要求的情况下，该元件作为一个“步骤”而不是一个“动作”来表述。在此没有表述定义的，权利要求的术语指的是所有普通的或常用的意义，该意义与现有的规范和文档历史不相矛盾。Although the specific system and method for home network content protection and copy management shown and described in detail here can completely solve the above-mentioned objectives of the present invention, it should be understood that it is an existing preferred embodiment of the present invention , and it only represents the subject matter of the broader invention, the scope of the invention also includes other embodiments that may be obvious to those skilled in the art, and only the appended claims can summarize the scope of the invention, wherein the label of singular elements is not Does not mean "one and only one", but "one or more", unless expressly stated. all structural or functional equivalents to the elements described in the above preferred embodiments are known, or subsequently become known, to those of ordinary skill in the art, such equivalents are expressly incorporated by reference herein, and included in this claim. Also, it is not necessary to describe in detail every means or method and every problem that the present invention can solve since they will all be included in the claims. Furthermore, no described element, composition or method step is disclosed to the public without regard to whether the element, composition or method step is explicitly recited in the claims. Elements claimed herein are not to be construed under 35 U.S.C. §112, paragraph 6, unless the element is clearly stated using the phrase "means for" or, in the case of a method claim, the Elements are described as a "step" rather than an "action". Where no definition is expressed herein, claim terms are given their ordinary or commonly used meanings that are not inconsistent with existing specification and document history.

Claims (25)

1. method that is used for carrying out in the private home entertainment network with a plurality of replay devices content protecting comprises:
Receive discrete content from content source, the characteristics of this discrete content are that it can be play on any suitable replay device, comprise being in the outer device of this private home entertainment network;
This discrete content is tied to this home entertainment network so that it becomes bound content, and the characteristics of this bound content are that it only can be play on the replay device in this private home entertainment network;
Allow the user of this private home entertainment network that this bound content is changed back discrete content; And
If the user has done such conversion to this bound content, then will make all copies of this bound content all become unavailable.
2. method as claimed in claim 1, wherein by delete this content or relative key or permission from network, it is unavailable that this bound content is become.
3. method as claimed in claim 1, wherein this content source is the wherein a kind of of the following stated at least: broadcast content source, broad band source or physical medium source.
4. method as claimed in claim 1 is wherein used at least one key relevant with this private home entertainment network to encrypt this discrete content, thereby this discrete content is become bound content.
5. method as claimed in claim 1, wherein this content source is a movably storage device at least.
6. method as claimed in claim 1, wherein this content source is a disc, and this disc is discrete or bound content by visable indicia with what indicate its preservation.
7. system that is used for carrying out at the home entertainment network with a plurality of replay devices content protecting comprises:
Be used for receiving the device of discrete content from content source;
Be used to use at least one key relevant to this content-encrypt, make it become the device of the bound content that is tied to this home entertainment network with this home entertainment network;
Be used for device in this this bound content of home entertainment network storage;
The device that is used to make bound content at least one device of this network, to play;
Be used to allow the user this bound content to be converted to the device of the discrete content of releasing and this network bound; With
If the user converts this bound content to discrete state, be used to make the binding copy of all these contents in the network all to become disabled device.
8. system as claimed in claim 7, wherein this content source is the wherein a kind of of the following stated at least: broadcast content source, broad band source or physical medium source.
9. system as claimed in claim 7, wherein be used at least to encrypt, store, make content become available, allow and make it to become disabled device to comprise the logical process of carrying out by at least one processor.
10. system as claimed in claim 7, wherein the content that receives from content source is a discrete content, the feature of this discrete content is can play on the replay device the replay device in this home entertainment network at least.
11. system as claimed in claim 7, wherein the feature of this bound content is only can play on the replay device in this private home entertainment network, and this bound content can be duplicated N time in this home entertainment network at least freely, wherein N 〉=1.
12. system as claimed in claim 7 wherein by deleting this content from network, and becomes this bound content unavailable.
13. system as claimed in claim 7 wherein passes through this content cancellation licence, and becomes this bound content unavailable.
14. system as claimed in claim 7, wherein content source is a disc, and this disc is discrete or bound content by visable indicia with what indicate its preservation.
15. the one family entertainment systems comprises:
A plurality of replay devices of in a private network, communicating by letter; Be used to carry out the processor of following logical process with at least one:
Allow the user on any replay device, to play discrete content, but can not make the copy of this content,
Allow the user that discrete content is converted to bound content, and can make the copy of N this bound content at least, N 〉=1 wherein,
Allow the user of this private home entertainment network that this bound content is changed back discrete content, and
If the user does such conversion to this bound content, it is unavailable that all copies of this bound content are become, wherein
The feature of discrete content is to play on the authorization device outside this private network, and the feature of bound content is only can play on the replay device in this network.
16. as the system of claim 15, wherein by delete this content or relative key or licence from network, it is unavailable that this bound content is become.
17. the system as claim 15 wherein receives discrete content from disc, and this disc is discrete or bound content by visable indicia with what indicate its preservation.
18., wherein use at least one key relevant to encrypt this discrete content, thereby this discrete content become bound content with this private home entertainment network as the system of claim 15.
19. system as claim 15, wherein should comprise the root version of specifying a bound content by the logical process that processor is carried out, can in this network, make the copy of this bound content by this root version, if this bound content has been changed back discrete content, it is unavailable that this bound content is become.
20. a method that is used for carrying out at the network with at least one replay device content protecting comprises:
Receive discrete content from content source, the characteristics of this discrete content are that it can be play on any suitable replay device, comprise being in the outer device of this private home entertainment network;
This discrete content is tied to this home entertainment network so that it becomes bound content, and the characteristics of this bound content are that it only can be play on the replay device in this private home entertainment network;
Allow the user of this private home entertainment network that this bound content is changed back discrete content; And
If the user does such conversion to this bound content, then make all copies of this bound content all become unavailable.
21. as the method for claim 20, wherein by delete this content or relative key or licence from network, it is unavailable that this bound content is become.
22. as the method for claim 20, wherein this content source is the wherein a kind of of the following stated at least: broadcast content source, broad band source or physical medium source.
23., wherein use at least one key relevant to encrypt this discrete content, thereby this discrete content become bound content with this private home entertainment network as the method for claim 20.
24. as the method for claim 20, wherein this content source is a movably storage device at least.
25. as the method for claim 20, wherein this content source is a disc, and this disc is discrete or bound content by visable indicia with what indicate its preservation.
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