CN1968107A - A method for transmitting and charging digital media files - Google Patents

Abstract

The invention provides a method for transmitting and charging digital media files, belonging to the field of digital media transmission and DRM encryption protection. In order to solve the defects of digital media transmission and charging in the prior art, the invention provides a method for transmitting and charging a digital media file, which comprises the following steps: constructing a transmission and charging system of the digital media file, and storing the digital media file in the system; selling the digital media player and the digital media playing card to a user, establishing a file in a system for the user, and establishing a charging account; encrypting the digital media file, generating a ciphertext corresponding to the user and a key of the ciphertext, and storing the ciphertext and the key; and sending the ciphertext to the digital media player of the user, verifying the identity of the user when the user plays the digital media, sending the secret key and the playing authorization to the digital media player of the user after the verification is passed, and deducting the charge of the charging account of the user.

Description

Translated fromChinese

一种数字媒体文件的传送与收费方法A method for transmitting and charging digital media files

技术领域technical field

本发明涉及数字媒体的传送系统和数字媒体DRM(数字版权保护，Digital RightManagement)加密保护系统，特别涉及采用DVB(数字电视)数据广播的高速数据传输技术传送数字媒体的系统和采用预售充值卡系统对于数字媒体文件进行收费方法。The present invention relates to a transmission system of digital media and a digital media DRM (Digital Rights Protection, Digital Right Management) encryption protection system, in particular to a system for transmitting digital media using high-speed data transmission technology of DVB (digital television) data broadcasting and a pre-sale recharge card The system charges the digital media files.

背景技术Background technique

随着数字技术的发展，音乐、电影、文学等作品都已经脱离了传统的载体(如录音带、胶片拷贝、纸张等)，演变成了计算机上的数字文件，数字媒体成为音频、视频作品和文学作品的载体。从这个意义上讲，数字媒体产品是一个非常大的范畴，至少包括数字音乐、数字电影、数字电视节目、数字视频、数字文学作品、Web(网页)文件等。With the development of digital technology, music, film, literature and other works have been separated from traditional carriers (such as tapes, film copies, paper, etc.) and have evolved into digital files on computers. carrier of the work. In this sense, digital media products are a very large category, at least including digital music, digital movies, digital TV programs, digital videos, digital literary works, Web (web page) files, etc.

数字媒体给人们带来了新的文明和新的生活模式，但同时也给著作权人带来了烦恼和损失。由于数字媒体的复制几乎是无成本的，数字媒体的网络传播几乎是无障碍和无边界的，致使盗版严重。因此，对数字媒体的收费就变成了整个数字媒体产业链中最大的难题。无论著作权人、制作人、发行商、零售商、用户都在寻找一种适合数字媒体特点的收费方法。Digital media has brought people a new civilization and a new mode of life, but at the same time it has also brought troubles and losses to copyright owners. Because the duplication of digital media is almost free of cost, the network transmission of digital media is almost barrier-free and borderless, resulting in serious piracy. Therefore, charging for digital media has become the biggest problem in the entire digital media industry chain. Regardless of the copyright owner, producer, distributor, retailer, and user, they are all looking for a charging method suitable for the characteristics of digital media.

对于数字媒体的收费，必须解决三个难题：第一是数字媒体的传输问题；第二是数字媒体的版权保护问题；第三是数字媒体的计费问题。全世界都在对这些问题进行探讨和尝试。For the charging of digital media, three problems must be solved: the first is the transmission of digital media; the second is the copyright protection of digital media; the third is the billing of digital media. The whole world is discussing and trying these problems.

在数字媒体收费的实践中，最典型的案例是美国苹果公司为销售数字音乐提供了成功的商业模式和方法。苹果公司的方法是发明了一个iPod(苹果公司数字音乐播放器的名称)数字音乐播放器，其内置有大容量存储介质。苹果公司将iPod卖给用户，可以让用户将喜欢的数字音乐存储在iPod播放器中，随时享受数字音乐。在2003年4月，苹果公司在互联网上以网站形式提供了iTunes(苹果公司数字音乐专卖店的名称)数字音乐专卖店。拥有iPod播放器的用户需要通过PC(个人计算机)接入互联网，通过登录苹果公司的iTunes网站，用在线支付的方法下载需要购买的数字音乐作品到自己的PC机上，再从PC机上将下载购买的数字音乐传输到iPod播放器的存储器中。该数字媒体音乐不能在PC或其他类似的MP3(数字音乐的格式)播放机上播放，只能在iPod播放器上播放。这种方法被称为苹果公司的“iPod+iTunes”在线数字音乐销售，获得了巨大的成功。In the practice of charging for digital media, the most typical case is that Apple Inc. of the United States has provided a successful business model and method for selling digital music. Apple's approach was to create an iPod (Apple's name for its digital music player) digital music player with a built-in mass storage medium. Apple sells iPod to users, allowing users to store their favorite digital music in the iPod player and enjoy digital music at any time. In April 2003, Apple Inc. provided the iTunes (the name of the Apple Inc. Digital Music Store) digital music store in the form of a website on the Internet. Users with iPod players need to access the Internet through a PC (personal computer), log in to Apple's iTunes website, download the digital music works to be purchased to their own PCs by means of online payment, and then download and purchase from the PC. digital music to the iPod player's memory. This digital media music cannot be played on PC or other similar MP3 (format of digital music) players, only on iPod players. This approach, known as Apple's "iPod+iTunes" online digital music sales, has been a huge success.

另一种典型的数字媒体收费的商业方法是人们熟悉的IPTV(网络电视)中的VOD(交互式多媒体视频点播，Video On Demand)点播模式，现在很多运营商都在尝试用这种商业方法开展数字视频媒体的收费服务。这种方法是用户通过一个专用的STB(机顶盒，Set Top Box)连接到Internet(互联网)网络，在线登录到运营商的VOD服务平台，点播某一个影片后，运营平台响应用户的请求，为用户传送一个视频数据流，用户通过STB在线收看影片。值得注意的是这个数字媒体是以数据流的方式从Internet传送过来的，在STB上以流媒体方式播放时，不能存储文件。运营商通过STB认证，计费销售数字媒体，或者采用包月方式收费。Another typical commercial method of charging for digital media is the VOD (Interactive Multimedia Video on Demand, Video On Demand) on-demand mode in the familiar IPTV (Internet TV). Now many operators are trying to use this business method to develop digital media. Paid services for video media. This method is that the user connects to the Internet (Internet) network through a dedicated STB (set top box, Set Top Box), logs in to the operator's VOD service platform online, and after ordering a certain movie, the operating platform responds to the user's request and provides services for the user. Transmit a video data stream, and users watch movies online through STB. It is worth noting that this digital media is transmitted from the Internet in the form of data streams, and files cannot be stored when played in streaming media on the STB. Operators pass STB certification and sell digital media by billing, or charge by monthly subscription.

以上两者典型的数字媒体收费方法都存在缺陷和不足：第一，从传输角度看，依赖的传输通道都是Internet网络，对于数字音乐是没问题的，但是对于数字视频媒体，Internet的网络带宽就成了瓶颈。随着平板电视机的普及，现在已经进入了高清时代，高清晰数字媒体所需要的带宽，用现在效率最高的H.264的压缩方法，也需要6-8M的数据传输带宽。显然通过Internet网络传输是不能满足需要的。如果采用下载存储的方式，对于一部达到几十个G的超大文件高清影片，需要连续几天时间才能完成下载，这将不能达到商业服务的目的。第二，从数字版权保护的角度看，苹果公司采用捆绑专用设备的方法；IPTV采用终端设备不能存储的流媒体播放的方法。事实上以上两者方法对于数字媒体来说，都没有DRM数字版权保护，用户通过简单的技术手段就可以复制和再传播这个数字媒体文件。两者都不能解决盗版的问题，那么这样的商业方法就会受到著作权人的质疑。第三，从计费和收费角度看，以上两种方法都需要通过Internet在线支付。另一方面，对于苹果公司提供下载收费的模式，因为不能解决多次播放的计费问题，因而对于数字视频，特别是数字电影，著作权人和发行商是不接受这种计费和收费方法的。There are defects and deficiencies in the above two typical digital media charging methods: first, from the perspective of transmission, the dependent transmission channel is the Internet network, which is no problem for digital music, but for digital video media, the network bandwidth of the Internet It becomes a bottleneck. With the popularity of flat-panel TVs, we have now entered the high-definition era. The bandwidth required by high-definition digital media, using the most efficient H.264 compression method, also requires a data transmission bandwidth of 6-8M. Obviously, transmission through the Internet network cannot meet the needs. If the way of downloading and storing is adopted, for a high-definition movie with an ultra-large file reaching dozens of G, it will take several days to complete the download, which will not achieve the purpose of commercial services. Second, from the perspective of digital copyright protection, Apple uses the method of bundling special equipment; IPTV adopts the method of streaming media playback that cannot be stored in terminal equipment. In fact, the above two methods do not have DRM digital copyright protection for digital media, and users can copy and redistribute this digital media file through simple technical means. Neither of them can solve the problem of piracy, so such a business method will be questioned by copyright owners. Third, from the perspective of billing and charging, both of the above two methods require online payment through the Internet. On the other hand, for Apple's charging model for downloading, because it cannot solve the billing problem of multiple playbacks, copyright owners and distributors do not accept this billing and charging method for digital videos, especially digital movies .

发明内容Contents of the invention

本发明为了解决现有技术中数字媒体传送速度不能满足要求和收费模式不健全的缺陷，提供了一种数字媒体文件的传送与收费方法。所述技术方案如下：In order to solve the defects that the transmission speed of digital media cannot meet the requirements and the charging mode is not perfect in the prior art, the present invention provides a method for transmitting and charging digital media files. Described technical scheme is as follows:

本发明提供了一种数字媒体文件的传送与收费方法，所述方法包括以下步骤：The invention provides a method for transmitting and charging digital media files, the method comprising the following steps:

步骤A：构建一个数字媒体文件的传送与收费系统，并将数字媒体文件存入所述系统内；Step A: Construct a transmission and charging system for digital media files, and store the digital media files in the system;

步骤B：销售数字媒体播放机和数字媒体播放卡给用户，然后为购买所述数字媒体播放机和数字媒体播放卡的用户在所述系统内建立档案，并设立计费账户；Step B: sell the digital media player and the digital media player card to the user, then set up a file in the system for the user who purchased the digital media player and the digital media player card, and set up a billing account;

步骤C：对数字媒体文件进行加密生成密文和该密文的密钥，并将密文和密钥分开存储；Step C: Encrypting the digital media file to generate ciphertext and a key of the ciphertext, and storing the ciphertext and the key separately;

步骤D：将所述密文发送给用户的数字媒体播放机，当用户进行播放时，验证用户身份，验证通过后，将所述密文对应的密钥发送给用户的数字媒体播放机，允许用户播放数字媒体文件，并对所述用户的计费账户进行费用扣除。Step D: Send the ciphertext to the user's digital media player. When the user plays, verify the user's identity. After the verification is passed, send the key corresponding to the ciphertext to the user's digital media player, allowing The user plays the digital media file, and charges are deducted from the user's billing account.

所述步骤A中的数字媒体文件的传送与收费系统包括：系统控制管理平台系统、用户管理子系统、充值卡管理子系统、用户综合服务网站子系统、DRM版权保护加密子系统、密文数据库、密钥数据库、密文发送子系统、密钥发送子系统、DVB数据广播子系统、用户身份验证和计费子系统。The transmission and charging system of digital media files in the step A includes: system control management platform system, user management subsystem, recharge card management subsystem, user comprehensive service website subsystem, DRM copyright protection encryption subsystem, ciphertext database , key database, ciphertext sending subsystem, key sending subsystem, DVB data broadcasting subsystem, user authentication and billing subsystem.

所述步骤B中的数字媒体播放机内部带有DVB数据广播接收模块和大容量存储介质，并带有能够连接Internet网络的Ethernet网络接口。The digital media player in the step B has a DVB data broadcast receiving module and a large-capacity storage medium inside, and has an Ethernet network interface capable of connecting to the Internet.

所述步骤B中的数字媒体播放卡是一种不能被复制的智能卡，卡内包含唯一的用户身份代码ID、用户信息和用户交费信息，所述信息在智能卡上以加密形式进行存储。The digital media player card in the step B is a smart card that cannot be copied, and contains unique user identity code ID, user information and user payment information in the card, and the information is stored in encrypted form on the smart card.

所述步骤C中的加密采用的是一种DRM的加密方法，对数字媒体加密后产生密文和密钥两个文件，所述密文存储在密文数据库中，所述密钥存储在密钥数据库中。What the encryption in the described step C adopts is a kind of DRM encryption method, produces two files of ciphertext and key after encrypting digital media, and described ciphertext is stored in ciphertext database, and described key is stored in ciphertext. key database.

所述步骤D具体包括以下步骤：Described step D specifically comprises the following steps:

步骤D1：将所述密文发送给用户的数字媒体播放机；Step D1: sending the ciphertext to the user's digital media player;

步骤D2：用户播放存储在数字媒体播放机内的数字媒体文件，数字媒体播放机自动通过Internet网络发送关于所述媒体文件的播放请求给系统；Step D2: The user plays the digital media file stored in the digital media player, and the digital media player automatically sends a play request about the media file to the system through the Internet network;

步骤D3：系统收到所述播放请求后，验证用户身份及所述账户余额，验证通过后，将密钥和授权通过Internet网络发送给用户的数字媒体播放机；Step D3: After the system receives the playing request, it verifies the user's identity and the account balance, and after passing the verification, sends the key and authorization to the user's digital media player through the Internet;

步骤D4：所述用户的数字媒体播放机收到密钥和授权后，用所述密钥对密文进行解密，同时播放解密后的数字媒体文件，所述授权是授权用户一次播放或者多次播放，或者是授权用户在一定时间内播放；Step D4: After receiving the key and the authorization, the user's digital media player decrypts the ciphertext with the key, and plays the decrypted digital media file at the same time. The authorization is to authorize the user to play once or multiple times Play, or authorize users to play within a certain period of time;

步骤D5：根据用户播放的数字媒体文件对所述用户的计费账户的费用进行扣除。Step D5: Deducting the fee from the user's billing account according to the digital media file played by the user.

所述步骤D1中的密文发送采用DVB网络数据广播通道高速传输，所述DVB网络是通过卫星接收天线连接的卫星DVB-S网络，或者是通过同轴电缆连接的有线网DVB-C网络，或者是通过地面波接收天线连接的地面波DVB-T网络，或者是中国标准的地面波CDMB-T网络。The ciphertext in the step D1 is sent using a DVB network data broadcast channel for high-speed transmission, and the DVB network is a satellite DVB-S network connected by a satellite receiving antenna, or a wired network DVB-C network connected by a coaxial cable, Either a terrestrial DVB-T network connected through a terrestrial receiving antenna, or a Chinese standard terrestrial CDMB-T network.

所述步骤D2和D3中的Internet网络是Internet运营商运营的有线网络，或者是移动通信运营商运营的无线网络，所述网络采用GSM网络的GPRS接入方式，或者采用CDMA网络的CDMA 1X接入方式。The Internet network in described steps D2 and D3 is the wired network of Internet operator's operation, or the wireless network of mobile communication operator's operation, and described network adopts the GPRS access mode of GSM network, or adopts the CDMA 1X access of CDMA network input method.

所述步骤D5中的费用是通过用户购买所述系统的充值卡充值实现预付费，具体充值方法是用户在商业网点购买运营商销售的充值卡，获得充值卡密码，然后登录所述系统，输入卡号和充值卡密码对用户自己的计费账户进行充值实现的预付费。The fee in the step D5 is to realize the prepayment by recharging the recharge card of the system purchased by the user. The specific recharge method is that the user purchases the recharge card sold by the operator at a commercial network, obtains the recharge card password, and then logs into the system and enters The card number and recharge card password are used to recharge the user's own billing account to realize the prepayment.

所述步骤D5中的费用是通过银行转账的方式对所述计费账户进行充值实现预付费，或者是用户直接到运营商服务网点交纳现金对所述计费账户进行充值实现的预付费。The fee in step D5 is prepaid by recharging the billing account through bank transfer, or by recharging the billing account by the user directly at the operator's service outlet in cash.

本发明的技术方案带来的有益效果是：The beneficial effect that technical scheme of the present invention brings is:

通过本发明提供的采用DVB数据广播通道高速传输的数字媒体传送方法，解决了数字媒体的传输问题。The digital media transmission method using the DVB data broadcast channel for high-speed transmission provided by the invention solves the problem of digital media transmission.

通过采用DRM数字版权保护的方法对数字媒体文件进行加密，使得非法用户即使零成本复制或传播该数字媒体文件，也没有办法解密和播放。解决了数字媒体的版权保护问题。By adopting the DRM digital copyright protection method to encrypt digital media files, even if illegal users copy or spread the digital media files at zero cost, there is no way to decrypt and play them. The problem of copyright protection of digital media is solved.

通过Internet的网络双向数据通道，在线传送DRM解密信息，使得用户每一次播放必需要获得播放授权和DRM解密的密钥，解决了数字媒体的播放计费问题。Through the two-way data channel of the Internet, the DRM decryption information is transmitted online, so that users must obtain the playback authorization and the DRM decryption key every time they play, which solves the problem of billing for digital media playback.

数字媒体运营商通过销售充值卡的方法实现对用户的预收费，在给用户发出播放授权和DRM解密的密钥之后，从用户充值卡账户中扣款，解决了数字媒体的收费问题。Digital media operators realize the pre-charging of users by selling recharge cards. After issuing playback authorization and DRM decryption keys to users, they deduct money from users' recharge card accounts, which solves the problem of digital media charges.

附图说明Description of drawings

图1是本发明提供的数字媒体文件传送与收费系统示意图；Fig. 1 is a schematic diagram of digital media file transmission and charging system provided by the present invention;

图2是本发明提供的运营商对数字媒体文件的传送与收费进行准备的流程图；Fig. 2 is the flow chart that the operator provided by the present invention prepares for the transmission and charging of digital media files;

图3是本发明提供的数字媒体文件的传送与收费的方法流程图。Fig. 3 is a flow chart of the method for transmitting and charging digital media files provided by the present invention.

具体实施方式Detailed ways

下面结合附图和具体实施例对本发明作进一步说明，但不作为对本发明的限定。The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

本发明的运营商首先向用户销售数字媒体播放机和数字媒体播放卡，然后对用户使用数字媒体文件进行收费。其中数字媒体产品是数字音视频媒体产品，可以是数字电影或者数字电视剧等高清晰度的数字媒体文件。The operator of the present invention first sells the digital media player and the digital media playing card to the user, and then charges the user for using the digital media file. The digital media product is a digital audio and video media product, which may be a high-definition digital media file such as a digital movie or a digital TV series.

运营商对数字媒体文件的传送与收费作准备。参见图2，具体准备过程如下：The operator prepares for the delivery and charging of digital media files. See Figure 2, the specific preparation process is as follows:

步骤201：数字媒体运营商按照图1所示的系统构建一个数字媒体传送与收费系统。Step 201: The digital media operator constructs a digital media transmission and charging system according to the system shown in FIG. 1 .

本发明所述的数字媒体传送系统，至少包括如下部分：系统控制管理平台系统100、用户管理子系统103、充值卡管理子系统104、用户综合服务网站子系统105、DRM版权保护加密子系统106、密文数据库107、密钥数据库108、密文发送子系统109、密钥发送子系统110、DVB数据广播子系统111、用户身份验证和计费子系统112，另外还可以包括：数字媒体制作子系统101、数字媒体数据库102、Internet接口平台子系统113。The digital media transmission system of the present invention at least includes the following parts: system control management platform system 100, user management subsystem 103, recharge card management subsystem 104, user comprehensive service website subsystem 105, DRM copyright protection encryption subsystem 106 , ciphertext database 107, key database 108, ciphertext sending subsystem 109, key sending subsystem 110, DVB data broadcasting subsystem 111, user authentication and billing subsystem 112, can also include in addition: digital media production Subsystem 101, digital media database 102, Internet interface platform subsystem 113.

步骤202：运营商从数字媒体版权持有人那里取得正版的音视频作品，经过数字媒体制作系统101将音视频作品转换为数字媒体文件，并将该数字媒体文件存储在数字媒体数据库102中。Step 202 : The operator obtains the genuine audio and video works from the digital media copyright holder, converts the audio and video works into digital media files through the digital media production system 101 , and stores the digital media files in the digital media database 102 .

步骤203：运营商发展客户，销售专用的数字媒体播放机和数字媒体播放卡，该播放卡是一种智能卡，包含用户身份号码和用户计费信息等。一机一卡，如果没有数字媒体播放卡，数字媒体播放机是不能工作的。Step 203: The operator develops customers and sells a dedicated digital media player and a digital media player card. The player card is a smart card that contains user ID numbers and user billing information. One machine, one card, if there is no digital media player card, the digital media player cannot work.

用户可以在运营商的销售网点购买数字播放机和数字媒体播放卡。用户使用数字媒体播放机时需要将这个数字媒体播放机同时接入DVB网络和Internet网络。这个DVB网络可以是通过卫星接收天线连接的卫星DVB-S网络，或者是通过同轴电缆连接的有线网DVB-C网络，或者是通过地面波接收天线连接的地面波DVB-T网络，也可以是中国标准的地面波CDMB-T网络。对于Internet网络可以通过各种公知的方法接入。Users can purchase digital players and digital media playing cards at the operator's sales outlets. When using the digital media player, the user needs to connect the digital media player to the DVB network and the Internet at the same time. This DVB network can be a satellite DVB-S network connected through a satellite receiving antenna, or a cable network DVB-C network connected through a coaxial cable, or a ground wave DVB-T network connected through a ground wave receiving antenna, or It is the Chinese standard ground wave CDMB-T network. The Internet can be accessed through various known methods.

步骤204：运营商根据销售计划，从数字媒体数据库102中取出数字媒体文件，通过DRM加密子系统106对数字媒体文件进行加密，加密后的密文送到密文数据库107中存储，密钥送到密钥数据库108中存储。Step 204: The operator takes out the digital media file from the digital media database 102 according to the sales plan, encrypts the digital media file through the DRM encryption subsystem 106, and sends the encrypted ciphertext to the ciphertext database 107 for storage, and sends the key to stored in the key database 108.

数字媒体传送系统中的DRM版权保护加密子系统106采用一种DRM加密技术，对数字媒体文件进行加密，产生两个文件，一个是加密过的数字媒体文件(简称密文)，另一个是对密文进行解密的信息文件(简称密钥)。将密文和密钥分开存储，分别存储在密文数据库107和密钥数据库108中。The DRM copyright protection encryption subsystem 106 in the digital media transmission system adopts a DRM encryption technology to encrypt digital media files to generate two files, one is encrypted digital media files (ciphertext for short), and the other is the encrypted The information file (referred to as the key) for decrypting the ciphertext. The ciphertext and the key are stored separately, and stored in the ciphertext database 107 and the key database 108 respectively.

随着数字加密技术的发展，已经有几十种DRM方法，本发明中必需选择一种满足上述要求的DRM加密方法，要求这种DRM可以对数字媒体文件整体进行加密，产生密文和密钥两个文件。特别是，该DRM的加密过程，要与数字媒体传送系统中用户管理子系统103中的合法用户相关联。即加密产生的密文和解密用的密钥要包含合法用户数字媒体播放卡中的信息。Along with the development of digital encryption technology, there are dozens of DRM methods, must select a kind of DRM encryption method that meets the above-mentioned requirements in the present invention, require this DRM to be able to encrypt the whole digital media file, produce ciphertext and key two files. In particular, the encryption process of the DRM should be associated with the legitimate users in the user management subsystem 103 in the digital media delivery system. That is, the ciphertext generated by encryption and the key used for decryption will contain the information in the digital media player card of the legal user.

步骤205：运营商在用户管理子系统103中为购机的客户建立档案，并设立一个计费账户。这个账户是以用户数字媒体播放卡的用户码为标识的。当用户购买了数字媒体播放卡后，运营商就为他建立用户档案和消费账户，该用户就成为了运营商的入网用户。Step 205: The operator establishes a file for the customer who purchases the machine in the user management subsystem 103, and sets up a billing account. This account is identified by the user code of the user's digital media player card. When a user purchases a digital media player card, the operator establishes a user profile and consumption account for him, and the user becomes a network user of the operator.

步骤206：运营商销售充值卡。运营商使用充值卡管理子系统104制作、发行、管理充值卡的销售和账户管理，销售充值卡实现预收费。这个步骤是针对使用充值卡进行付费的用户来进行的，因为付费有多种方式，当用户选择使用充值卡进行付费时，运营商需要提供充值卡给用户，也就需要进行该步骤，否则可以不进行。Step 206: The operator sells the rechargeable card. The operator uses the recharge card management subsystem 104 to make, issue, and manage the sales and account management of recharge cards, and to realize pre-charging by selling recharge cards. This step is carried out for users who use recharge cards to pay, because there are many ways to pay, when users choose to use recharge cards to pay, operators need to provide recharge cards to users, and this step is required, otherwise you can not proceed.

步骤207：运营商发送数字媒体密文给用户的数字媒体播放机。根据销售计划，运营商利用本销售系统的密文发送系统109从密文数据库107中取出密文，送到DVB数据广播系统111，发指令让DVB数据广播系统111将密文传输给用户的数字媒体播放机。Step 207: The operator sends the digital media ciphertext to the user's digital media player. According to the sales plan, the operator uses the ciphertext sending system 109 of the sales system to take out the ciphertext from the ciphertext database 107, send it to the DVB data broadcasting system 111, and send an instruction to let the DVB data broadcasting system 111 transmit the ciphertext to the user's digital media player.

这时用户可以根据节目导航单选择自己喜欢的数字视频媒体，进行选择接收，就像在音像店里选择购买光碟一样。DVB数据广播是一种成熟的技术，是将密文打包，以数据传输流TS(传输流，遵循ISO/IEC 13818-1 Transport Stream标准)为载体，高速广播推送的技术方法，数据通道传输的速率高达30Mbps以上。DVB数据广播通道可以根据情况选择使用通过卫星接收天线连接的卫星DVB-S网络，或者是通过同轴电缆连接的有线网DVB-C网络，或者是通过地面波接收天线连接的地面波DVB-T网络，也可以是中国标准的地面波CDMB-T网络。所以用户选择的节目很快就会被接收下来，存储在数字媒体播放机中。At this time, the user can select the digital video media he likes according to the program navigation list, and choose to receive it, just like choosing to buy a CD in an audio-visual store. DVB data broadcasting is a mature technology, which packs the ciphertext, takes the data transmission stream TS (transport stream, following ISO/IEC 13818-1 Transport Stream standard) as the carrier, high-speed broadcasting push technology, and data channel transmission The rate is as high as 30Mbps or more. The DVB data broadcast channel can choose to use the satellite DVB-S network connected through the satellite receiving antenna, or the cable network DVB-C network connected through the coaxial cable, or the terrestrial DVB-T connected through the terrestrial wave receiving antenna. The network can also be the Chinese standard terrestrial wave CDMB-T network. So the program selected by the user will be received soon and stored in the digital media player.

用户采用上述从运营商处购买的带有DVB数据广播接收装置的数字媒体播放机来接收通过DVB数据广播传送的密文，接收的密文存储在数字媒体播放机的硬盘上。The user uses the above-mentioned digital media player with a DVB data broadcast receiving device purchased from the operator to receive the ciphertext transmitted through the DVB data broadcast, and the received ciphertext is stored on the hard disk of the digital media player.

参见图3，做好数字媒体文件的传送与收费准备后，当用户需要播放由本数字媒体传送与收费系统传送的数字媒体文件时，具体执行以下步骤：Referring to Figure 3, after preparing for the transmission and charging of digital media files, when the user needs to play the digital media files transmitted by the digital media transmission and charging system, the following steps are specifically performed:

步骤301：用户用购买充值卡为自己的账户充值。用户选择提前交纳使用费用时，可以通过购买充值卡的方式为自己的计费账户进行充值。Step 301: The user recharges his account by purchasing a recharge card. When the user chooses to pay the usage fee in advance, he can recharge his billing account by purchasing a recharge card.

用户购买媒体播放充值卡是预付费方法，其实运营商也可以采用让用户先消费，再按照账单收费的用户后付费方法收费。The user purchases a media playback recharge card is a prepaid method. In fact, the operator can also use the user postpaid method that allows the user to consume first and then charge according to the bill.

采用预付费的方法进行计费账户充值的过程：用户购买充值卡以后可以通过专用的数字媒体播放机登录上述系统，输入充值卡卡号和密码进行充值，充值卡管理子系统104和用户管理子系统103接收用户充值后，在用户账户中为用户存储预收费金额。用户对账户进行充值后，就为消费数字媒体文件进行了预付费。The process of recharging the billing account by using the prepaid method: After the user purchases the recharge card, he can log in to the above-mentioned system through a dedicated digital media player, enter the card number and password of the recharge card to recharge, the recharge card management subsystem 104 and the user management subsystem 103 After receiving the recharge from the user, store the prepaid amount for the user in the user account. After the user recharges the account, he has prepaid for the consumption of digital media files.

为计费账户进行充值也可以采用其它的方式进行，例如，通过银行转账的方式对所述计费账户进行充值，或者用户直接到运营商的服务网点交纳现金对所述计费账户进行充值。Recharging the charging account can also be carried out in other ways, for example, recharging the charging account by bank transfer, or the user directly pays cash at the service outlet of the operator to recharge the charging account.

步骤302：用户播放一个存储在数字媒体播放机内的数字媒体，数字媒体播放机自动发送关于这个媒体的播放请求。Step 302: The user plays a digital media stored in the digital media player, and the digital media player automatically sends a playback request for the media.

用户打开数字媒体播放机，会看到存储在硬盘上的数字媒体文件清单，就像打开自己的媒体库一样，当他选择某一个数字媒体播放时候，数字媒体播放机自动通过Internet连接系统的用户身份验证和计费子系统112验证身份并请求授权播放。这个过程是数字媒体播放机自动执行的，速度非常快，仅仅是几秒钟的时间，用户就像打开一个网页一样就会看到结果。When the user turns on the digital media player, he will see a list of digital media files stored on the hard disk, just like opening his own media library. When he chooses a certain digital media to play, the digital media player will automatically connect to the system through the Internet. Authentication and billing subsystem 112 verifies identity and requests authorization to play. This process is automatically performed by the digital media player, and the speed is very fast. It only takes a few seconds, and the user will see the result just like opening a web page.

步骤303：系统中的用户身份验证和计费子系统112接受用户请求，对用户身份进行验证。Step 303: The user identity verification and billing subsystem 112 in the system accepts the user request and verifies the user identity.

如果在用户管理子系统103中没有用户信息或者用户记录异常，则判定为非法用户，发出指令提示不予授权，数字媒体播放机不能解密停止播放。如果在用户管理子系统103中该用户有记录，但是账户中余额不足，则发出指令，在用户数字媒体播放机上显示信息，通知用户余额不足，用户可以再次购买充值卡充值。如果在用户管理子系统103中该用户有记录，而且账户中余额充足，则验证用户身份为合法。If there is no user information or the user record is abnormal in the user management subsystem 103, it is determined to be an illegal user, and an instruction is issued to prompt disapproval, and the digital media player cannot decrypt and stop playing. If the user has a record in the user management subsystem 103, but the balance in the account is insufficient, then an instruction is issued to display information on the user's digital media player to inform the user that the balance is insufficient, and the user can purchase a recharge card for recharging again. If the user has a record in the user management subsystem 103, and the balance in the account is sufficient, then verifying the identity of the user is legal.

步骤304：验证用户身份合法后，系统向密钥发送子系统110发出指令，向用户发送密钥和授权信息。Step 304: After verifying that the user's identity is legal, the system sends an instruction to the key sending subsystem 110 to send the key and authorization information to the user.

系统中的密钥发送子系统110通过Internet接口平台113连接Internet网络，向用户数字媒体播放机发送密钥和授权信息。授权信息可以授权用户一次播放或者多次播放，也可以授权用户在一定时间内播放。The key sending subsystem 110 in the system is connected to the Internet network through the Internet interface platform 113, and sends the key and authorization information to the user's digital media player. The authorization information may authorize the user to play once or multiple times, or authorize the user to play within a certain period of time.

步骤305：数字媒体播放机收到密钥和授权后，用密钥对密文进行解密，解密时数字媒体播放机同时播放数字媒体文件。解密后的数字媒体文件直接进行播放，不能进行存储。Step 305: After receiving the key and the authorization, the digital media player uses the key to decrypt the ciphertext, and the digital media player simultaneously plays the digital media file during decryption. The decrypted digital media files are played directly and cannot be stored.

步骤306：运营商根据用户播放数字媒体文件进行收费。Step 306: The operator charges according to the user playing the digital media file.

运营商根据该数字媒体的销售价格，在该用户的预付费账户中扣掉相应的金额，实现收费。同时，系统中的用户管理子系统103记录用户的所有播放清单明细和计费扣款明细，当用户请求查阅时，系统可以发送明细清单供用户核对。According to the sales price of the digital media, the operator deducts the corresponding amount from the user's prepaid account to realize charging. At the same time, the user management subsystem 103 in the system records all play list details and billing deduction details of the user. When the user requests to check, the system can send the detailed list for the user to check.

用户可以在任何时候，都可以通过数字媒体播放机登陆用户管理系统103查看自己的账户余额，也可以查看一个时期的播放数字媒体的消费清单。The user can log in to the user management system 103 through the digital media player at any time to check his or her account balance, or check the consumption list of playing digital media for a certain period.

采用销售充值卡预收费的方法进行数字媒体产品的收费时，数字媒体传送系统中的充值卡管理子系统104承担这个工作。运营商预先制作数字媒体播放充值卡，通过社会上的商业网点销售数字媒体播放的充值卡，用户购买了一定面值的充值卡后，必须刮去印刷涂层才能看到密码，然后登录数字媒体传送系统，输入卡号和充值密码对自己的账户进行充值。用户可以在数字媒体播放机上登录数字媒体传送系统对自己的账户进行充值。数字媒体传送系统的中的用户管理子系统103和充值卡管理子系统104协同工作，自动验证用户身份并在用户账户中记录用户的充值数额，完成传送的预收费。运营商销售充值卡实现了预收费，用户购买充值卡在自己账户中充值预存了购买数字媒体的费用。When charging digital media products by selling recharged cards in advance, the recharged card management subsystem 104 in the digital media transmission system undertakes this work. Operators pre-made digital media playback recharge cards, and sell digital media playback recharge cards through commercial outlets in the society. After purchasing a recharge card with a certain face value, users must scrape off the printed coating to see the password, and then log in to the digital media to send System, enter the card number and recharge password to recharge your account. The user can log in the digital media transmission system on the digital media player to recharge his account. The user management subsystem 103 and the recharge card management subsystem 104 in the digital media transmission system work together to automatically verify the user's identity and record the user's recharge amount in the user account to complete the pre-charge for transmission. Carriers sell recharge cards to achieve pre-charging, and users purchase recharge cards to recharge their own accounts to pre-store the cost of purchasing digital media.

以上所述的实施例，只是本发明较优选的具体实施方式的一种，本领域的技术人员在本发明技术方案范围内进行的通常变化和替换都应包含在本发明的保护范围内。The embodiments described above are only one of the more preferred specific implementations of the present invention, and the usual changes and replacements performed by those skilled in the art within the scope of the technical solutions of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. the transmission of a digital media file and charging method is characterized in that, said method comprising the steps of:

Steps A: make up the transmission and the Fare Collection System of a digital media file, and digital media file is deposited in the described system;

Step B: sales figure media player and Digital Media broadcast card are given the user, then for the user who buys described Digital Media player and Digital Media broadcast card sets up archives in described system, and set up the charging account;

Step C: digital media file is encrypted the key that generates ciphertext and this ciphertext, and with ciphertext and key separate storage;

Step D: the Digital Media player that described ciphertext is sent to the user, when the user plays, identifying user identity, after checking is passed through, the key of described ciphertext correspondence is sent to user's Digital Media player, allow the part of user's playing digital medium, and described user's charging account is carried out expense deduction.

2. the transmission of digital media file as claimed in claim 1 and charging method; it is characterized in that the transmission and the Fare Collection System of the digital media file in the described steps A comprise: system's control and management plateform system, user management subsystem, rechargeable card ADMINISTRATION SUBSYSTEM, user's integrated service website subsystem, DRM copyright protection encryption subsystem, ciphertext database, key database, ciphertext send subsystem, key sends subsystem, DVB data broadcasting subsystem, subscriber authentication and charge subsystem.

3. the transmission of digital media file as claimed in claim 1 and charging method, it is characterized in that, Digital Media player inside among the described step B has DVB data broadcasting receiver module and large-capacity storage media, and has the Ethernet interface that can connect the Internet network.

4. the transmission of digital media file as claimed in claim 1 and charging method, it is characterized in that, it is a kind of smart card that can not be replicated that Digital Media among the described step B plays card, comprise unique subscriber identity code ID, user profile and user's paying information in the card, described information is stored with encrypted form on smart card.

5. the transmission of digital media file as claimed in claim 2 and charging method, it is characterized in that, what the encryption among the described step C was adopted is the encryption method of a kind of DRM, to producing ciphertext and two files of key behind the digital media encryption, described ciphertext is stored in the ciphertext database, and described key is stored in the key database.

6. the transmission of digital media file as claimed in claim 1 and charging method is characterized in that, described step D specifically may further comprise the steps:

Step D1: the Digital Media player that described ciphertext is sent to the user;

Step D2: the user plays the digital media file be stored in the Digital Media player, and the Digital Media player sends playing request about described media file to system by the Internet network automatically;

Step D3: after described playing request was received by system, identifying user identity and described account balance after checking is passed through, sent to key and mandate user's Digital Media player by the Internet network;

Step D4: after described user's Digital Media player is received key and mandate, with described key ciphertext is decrypted, play the digital media file after deciphering simultaneously, described mandate is that authorized user is once play or repeatedly play, or authorized user is play within a certain period of time;

Step D5: the expense of described user's charging account is deducted according to the digital media file that the user plays.

7. the transmission of digital media file as claimed in claim 6 and charging method, it is characterized in that, ciphertext among the described step D1 sends and adopts DVB network data broadcast channel high-speed transfer, described DVB network is the satellite DVB-S network of reception antenna connection via satellite, or the wired network DVB-C network that connects by coaxial cable, or pass through the surface wave DVB-T network that the surface wave reception antenna connects, or the surface wave CDMB-T network of Chinese Industrial Standards (CIS).

8. the transmission of digital media file as claimed in claim 6 and charging method, it is characterized in that, Internet network among described step D2 and the D3 is the cable network of Internet operator operation, or the wireless network of mobile communication carrier's operation, the GPRS access way of described network using GSM network perhaps adopts the CDMA 1X access way of cdma network.

9. the transmission of digital media file as claimed in claim 6 and charging method, it is characterized in that, expense among the described step D5 is to buy the pre-payment of the rechargeable card realization of described system by the user, concrete recharge method is that the user buys the rechargeable card that operator sells in commercial network, obtain prepaid card password, login described system then, input card number and prepaid card password are supplemented the realization pre-payment with money to user's oneself charging account.

10. the transmission of digital media file as claimed in claim 6 and charging method, it is characterized in that, expense among the described step D5 is that the mode by bank transfer is supplemented the pre-payment of realization with money to described charging account, or the user directly pays cash to operator's service network described charging account is supplemented with money the realization pre-payment.

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