TWI358932B - Packet based high definition high-bandwidth digita - Google Patents

Packet based high definition high-bandwidth digita Download PDF

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TWI358932B
TWI358932B TW093128747A TW93128747A TWI358932B TW I358932 B TWI358932 B TW I358932B TW 093128747 A TW093128747 A TW 093128747A TW 93128747 A TW93128747 A TW 93128747A TW I358932 B TWI358932 B TW I358932B
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data packet
data packets
encryption
decryption
data
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TW093128747A
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TW200518547A (en
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Osamu Kobayashi
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Genesis Microchip Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • 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, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video stream decryption
    • H04N21/44055—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video stream decryption by partially decrypting, e.g. decrypting a video stream that has been partially encrypted
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H04L63/0471—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload applying encryption by an intermediary, e.g. receiving clear information at the intermediary and encrypting the received information at the intermediary before forwarding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
    • H04N21/23476—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption by partially encrypting, e.g. encrypting the ending portion of a movie
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/254—Management at additional data server, e.g. shopping server, rights management server
    • H04N21/2541—Rights Management
    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
    • 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
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4367—Establishing a secure communication between the client and a peripheral device or smart card
    • 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]
    • H04N21/80—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2463/00—Additional details relating to network architectures or network communication protocols for network security covered by H04L63/00
    • H04L2463/101—Additional details relating to network architectures or network communication protocols for network security covered by H04L63/00 applying security measures for digital rights management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
    • H04L63/1441—Countermeasures against malicious traffic
    • H04L63/1475—Passive attacks, e.g. eavesdropping or listening without modification of the traffic monitored

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Signal Processing For Recording (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Description

1358932 Π) 九 '發明說明 本專利申請案主張依據美國法典35號第11 9(e)條頒 給由Kobayashi於2 003年九月26日申請之美國臨時專利 申請案第 60/506，193號（法定代理人備忘錄第 GENSP047P號），名稱爲“提供以封包爲基礎之資料串 流中高淸晰度版權保護技術（PROVIDING HIGH DEFINITION COPY PROTECTION IN A PACKET BASED DATA STREAM”的優先權，其於此整體倂入參考。 【發明所屬之技術領域】 本發明係關於顯示裝置。更精確而言，本發明說明一 種能在以封包爲基礎之傳輸環境中提供聲頻/視頻資料大 量加密的方法與裝置 【先前技術】 所有權之數位內容的保護已成爲一個重要的考量，且 尤其是於高淸晰（HDHD)、高頻寬的應用。對HD、高 頻寬應用特別重要的是，內容保護提供數位化內容的所有 人能免於未授権的使用及拷貝他們所有權內容的保證。一 種一般稱爲HDCP之由美國加州聖克拉拉的英特爾公司所 發展之受歡迎的高頻寛數位內容保護方案業已廣爲實施。 如目前所組構者，此特定的HDCP協定係特別針對數位視 訊介面（DVI )及高淸晰度多媒體介面（HDMI )爲基礎 之環境的使用而設計者。 -4 - (2) (2)1358932 —般而言，HDCP對在諸如PC、DVD播放機或機上 盒之視頻源或發射器與諸如螢幕、電視或投影機之數位顯 示器或接收器間的傳輸加密。以此方式，H D C P設計來防 止數位內容的拷貝與記錄，因而保護其被傳輸時之內容的 完整性。舉例來說，如所述之HDCP協定所要求者，於一 認證階段期間，接收器僅會於其_旦顯示其知悉收發器透 過對一秘密値的計算所確認的認證金鑰時才會被供以內 容。再者，爲防止資料的竊聽與偷竊，發射器及接收器會 產生整個傳輸過程中一貫核對的一共享的秘密値。一旦認 證確定’發射器對該資料加密並將其傳送到接收器供解 密。 目前DVI標準的施行需要使用一組基於一]〇位元傳 輸協定所定義的字元。舉例來說，如目前建構者，僅有 460字元（取自1 024有效的可能字元）係接收器針對資 料來使用，而4字兀被用作爲像是hsync及vsync的明確 的控制信號。於此一設置中，任何時間接收器接收並認出 代表資料之其中一預先定義的字元時，則被接收者暗示地 定義一資料賦能信號（D E )爲處於作用的，藉以指示出 該被接收到之資料是真的資料。然而，每當4個控制字元 的其中之一被接收器接收時，接著會作出資料賦能 (DE )是不作用的暗示性的假設。 HDCPP協定使用 DE、Hsyne、Vsyne及其它稱爲 CNTL3的控制信號的狀態向其狀態機器提出。DE ' H s y n c '及V s y n e信號係與以一種“串流（s t r e a m j n g ) ”方 -5 - (3) (3)1358932 式傳輸的光柵視頻相關聯的時序信號。於一串流轉移中， 像素資料以像素率傳輸且遮沒週期對資料週期的比値被保 留。如果發生一封包轉移，則此等時序信號可能不會存 在。只有像素資料可以在封包串流中被轉移，而時序資訊 則以一不同方式來傳遞。因此，所需要的是一種支援高淸 晰度版權保護的方式，其能與現存諸如透過鏈路或以一封 包轉移模式操作的傳輸媒體之HDCP的高淸晰度版權保護 協定相容。 【發明內容】 因此’本發明提供一種以封包爲基礎之數位傳輸媒體 及協定’其支援可往回與現存的像是HDCP之高淸晰度版 權保護協定相容的高淸晰度版權保護技術。 於本發明一實施例中’描述一種以封包爲基礎之高頻 寬版權保護方法’其包括以下操作。在一來源裝置形成一 些資料封包’根據一組加密値加密該等資料封包，將來自 該來源裝置之已加密資料封包傳送到與其耦合的一接收裝 置’部分根據該等加密値解密該等已加密資料封包，以及 由該接收裝置存取該等被解密的資料封包。 於另一個實施例中’揭示一種用以提供以封包爲基礎 之高頻寬版權保護給一資料串流的系統，其包括一設置以 提供一些資料封包的來源單元 '一耦合到該來源單元而設 置以接收來自該來源單元之資料封包的接收單元、一耦合 到該來源單元而設置以加密從該來源單元傳送到該接收單 (4) (4)1358932 元之資料封包的加密單元、一耦合到該接收單元而設置以 解密該已加密資料封包的解密單元 '以及一設置以提供一 '袓用以加密/解密該等適合資料封包之加密/解密値的加 密/解密値產生器。 於另一個實施例中，揭示用以提供一種以封包爲基礎 之高頻寬版權保護之電腦程式產品，其包括用以在一來源 裝置形成一些資料封包的電腦碼、用以根據一組加密値加 密該等資料封包的電腦碼 '用以將來自該來源裝置之已加 密資料封包傳送到與其耦合之接收裝置的電腦碼，用以部 分根據該等加密値解密該等已加密資料封包的電腦碼 '用 以藉該接收裝置存取該等被解密的資料封包的電腦碼、以 及用以儲存該電腦碼之電腦可判讀媒體。 【實施方式】 現詳細參照本發明一特定實施例，其中一例係繪示於 附圖中。雖然本發明將連同該特定實施例予以說明，但應 瞭解到其並非意圖將本發明限制於所述之實施例。相反 地，其意圖涵蓋可包括於如本發明所附之申請專利範圍界 定之本發明的精神與範疇內的變通、修改、以及等同物。 如目前所施行者，HDCP建立一安全的通道，以便能 驗證顯示裝置係獲准接收受保護的內容，且一旦建立後， 在主機端加密該資料且在該顯示裝置解密以便使受保護的 內谷免受竊聽。此外’爲了分辨未授權還是被包含的裝 置’ H D C P倚賴認證及金鑰交換、內容加密、以及裝置可 -7 - (5) (5)1358932 更新性。 更精確而言，HDCP藉著對在視頻來源與數位顯示器 (接收器）間的傳輸加密而保護一數位視訊介面（DVI ) 環境中有版權的數位娛樂內容。該視頻來源可以是PC、 機上盒、DVD播放機及其類似者，且該數位顯示器可以 是液晶顯示器（LCD )、電視、電漿面版、或投影機，其 中所有被受權的裝置被給予一組獨特的秘密裝置金鑰。於 —認證程序期間，在該受保護之內容被送出之前，接收器 必須顯示出其認得一些秘密裝置金鑰。在該接收器承認該 等金鑰之後，雙方裝置（發送器與接收器）皆產生一爲防 止竊聽者偷取該內容而設計的共享的秘密値。認證之後， 該內容被加密並傳送到依次對它解密的接收器。 認證係一種用以驗證該顯示裝置係獲授權（或獲准） 可接收受保護內容的密碼程序。獲授權之主機及顯示裝置 二者皆認得一組由一陣列之四十個5 6位元的秘密裝置金 鑰，以及一對應之 40位元的二進位金鑰選擇向量 (KSV )所構成的秘密金鑰。主機藉發送一含有其金鑰選 擇向量AKSV、及一64位元的値An的啓始訊息而啓動認 證。顯示裝置藉發送一含有其金鑰選擇向量BKSV的應答 訊息而加以應答。該主機確認收到的K S V尙未被撤回。 於此時機，該二裝置能計算一共享値，倘若雙方裝置皆具 有一組有效的金鑰時，該共享値會相等。因爲認證現在業 已建立，此共享値將會被用於受保護內容的加密與解密。 再認證以一大約每二秒一次的速率持續著，以確定該 -8- (6) (6)1358932 鏈路持續的安全。倘若在任何時間，例如藉著切斷該顯示 裝置及/或連接一非法的記錄裝置而使該共享値的相等性 喪失時’該主機將會認爲DVI鏈路是未經認證的，而結 束受保護內容的傳輸。 內容係在來源裝置處被加密，以防止被傳輸之內容的 有用的 '未受權的拷貝被製造出來。加密係屬於—種演算 法的應用’稱爲加密器，其轉換該內容。要恢復該內容， 該顯示裝置藉著認出該正確的解密金鑰而解密該內容。 HDCP加密器係一種混合式的區塊/串流加密器。該區塊 加密器於認證協定期間運作。針對內容的加密及解密， HDCP使用一串流加密器，其中加密係藉著結合由HDCP 加密器產生的一資料串流與被傳輸之內容，透過—按位元 互斥或運算來達成。以此方式，該內容係以個別像素技術 (pixel-by-pixel )的方式受到保護。沒有解密而在顯示裝 置上觀看的已加密的內容會被視爲不具有可感知之內容的 隨機雜訊。如上述，目前可取得的HDCP協定必須使用— D V I型連接器加以實施。 本發明&E供種適用於以封包爲基礎之傳輸媒體的高 淸晰度高頻寬版權保護協定’其提供支援可往回與現存高 淸晰度版權保護協定相容的高淸晰度版權保護技術。於本 發明一實施例中，所發明的HDCP協定係以封包爲基礎之 问頻寬版權保護方法加以進行’其包括在一來源裝置形成 一些資料封包，根據一組加密値加密該等資料封包被選取 者，將來自該來源裝置之已加密資料封包傳送到與其耦合 -9- (7) (7)1358932 的一接收裝置，部分根據該等加密値解密該等已加密資料 封包’以及由該接收裝置存取該等被解密的資料封包。 一種特別合適之以封包爲基礎的傳輸系統參照第1圖 加以說明’其顯示一適合與本發明任何實施例共用之跨平 台以封包爲基礎之數位視頻顯示器介面100的廣義代表 圖。介面100經由一實體鏈路106(亦稱爲管路）將—發 射器102連接到—接收器1〇4。於—較佳實施例中，—些 資料串流1 08 - 1 I 2在發射器1 02處被接收，其如有需 要’將其等各個加以封包化成一些對應數量的資料封包 1 1 4。此等資料封包接著形成對應的資料串流，各該等資 料串流經由一相關聯的虛擬管路1 1 6 - 1 2 0被傳遞到接收 器1 〇 4。應注意到資料串流1 0 8 — 1 1 2可以採取諸如視 頻、圖形、聲頻等任何數目的形式。 典型地，當來源係一視頻源時，資料串流I 0 8 — ]] 2 包括多種能具有任何數目及型態之周知格式的視頻信號， 諸如複合視頻、串列數位、平行數位' R G B、或消費性數 位視頻。該視頻信號可以是類比視頻信號，假設來源I 0 2 . 包括某種形式的一類比視頻源像是例如類比電視、照相 機 '類比VCR、DVD播放機、攝錄影機、雷射影碟機、 電視調諧器、機上盒（具衛星D S S或纜線信號）及其類 似者。來源1 0 2亦能包括一數位影像源像是例如一數位電 視（D T V )、數位相機、及其類似者。該數位視頻信號可 以是任何數目及型態之周知的數位格式，諸如SMPTE 274M-]995 ( ]920 X ]080解析度，連續掃描或交錯掃 -10 - (8) 1358932 描）' SMPTE 296M-1997 ( 1280 x 720 解析度，連續掃 描）以及標準的4 8 0連續掃描視頻。 在來源1 02提供一類比影像信號的情形中，一類比對 數位轉換器（A/D)將一類比電壓或電流信號轉換成數 位編碼數字（信號）的一離散序列，其於過程中形成一適 於數位處理的合適的數位影像資料字。經由範例，其它A / D轉換器包括，例如那些由 Philips、 Texas Instrument、Analog Devices、B rooktree 以及其它所製造 者。 舉例說明，倘若資料串流1 1 0係一類比形式的信號， 則包括於或耦合到發射器1 02的類比到數位轉換器（未顯 示）會數位化該類比資料，其接著會被封包化器將該數位 化資料串流1 1 0轉換成一些資料封包1 1 4而加以封包化， 各該資料封包]14會經由虛擬鏈路116被傳送到接收器 1〇4 °接收器]〇4接著會藉著將該等資料封包〗14適當地 重組成它們的原始格式而重建資料串流i〗〇。就是此等資 料串流最後會被加密以形成一組受版權保護的資料串流。 75Hz ， 640 X 480 第2圖顯示適合與有關第1圖所述之系統200共用之 用以加密聲頻/視頻內容的加密系統。如第2圖所示，一 視頻源2 0 2被設置以提供一些資料串流，諸如資料串流 1 1 0與1] 2。藉利用一些資料串流，系統2 〇 〇能夠傳送視 頻資料，例如’與一些視頻格式任何一種一致並存者。舉 例來說’資料串流]]〇係以符合6 〇 H z，1 0 2 4 X 7 6 8的視 頻資料形成，而資料串流]丨2係以符合 -11 - (10) (10)1358932 2 02與接收器204間的訊務量符合一固定的鏈路環境。 應注意到於所述之實施例中，資料串流300係時域多 工的，該等與資料串流110結合的資料封包具有一較長於 該等與資料串流1 1 2結合的期間。於此等情況中，如有必 要，在接收器2 04內之一時基恢復（TBR)單元216利用 嵌入於主要鏈路資料封包內的時間戳記再產生該串流的原 始自然速率。現回來參照第2圖，在接收器204處，解串 列器單元2 1 8接收已加密資料串流300而提供輸入到一解 碼器單元200及一解封包器222。解碼器220對該控制封 包解碼，因而饋送提供給先前用以加密之一解密引擎228 的Hsyne、Vsyne及一特定控制字元CNTL3。 第4圖繪示一用以實施本發明的系統400。系統400 僅係一個圖形系統的例子，其中可以實施本發明。系統 4 00包括中央處理單元（CPU ) 410、隨機存取記憶體 (RAM ) 420、唯讀記憶體（ROM ) 425、一或多個週邊設 備430、圖形控制器460、主要儲存裝置440與4 5 0、以 及數位顯示器單元470。CPU410亦耦合到一或多個輸入 /輸出裝置490，其可包括，但並不限制於像是軌跡球、 滑鼠、鍵盤、麥克風 '觸摸式顯示器、轉換器讀卡機、磁 或紙帶閱讀機、平板、觸控筆、聲音或手寫辨識器、或是 其它諸如其它電腦之爲人周知的輸入裝置的裝置。圖形控 制器460產生類比影像資料以及一對應參考信號，並將二 者提供給數位顯示器單元470。類比影像資料可以，例 如’根據從CPU4 10接收之像素被產生，或形成—外部編 (11) (11)1358932 碼（未顯示）。於一實施例中，該類比影像資料係以 RGB格式提供且該參考信號包括習知的vSYNC與HSYNC信 號。然而’應瞭解本發明可以其它格式的類比影像、資料 及/或參考信號加以實施。例如，類比影像資料能包括亦 具有一對應的時間參考信號的視頻信號資料。 雖然僅說明本發明的一些實施例，應瞭解到本發明可 以多種其它特定格式實施而不背離本發明的精神與範疇》 本發明示範例亦可被視爲說明而非限制，且本發明並不受 限於本文所給之細節，但可在所附之申請專利範圍以及等 同物的全部範圍的範疇內加以修飾。 雖然本發明業已以一較佳實施例的方式加以描述，有 落在本發明範圍內的替代、變更、及等同物。應注意有多 種實施本發明之步驟.及裝置的替代方式。因此本發明意圖 被解讀爲包括所有落於本發明真正精神與範疇的此等替 代 '變更 '及等同物。 【圖式簡單說明】 第1圖顯示一適合與本發明任何實施例共用之跨平台 以封包爲基礎之數位視頻顯示器'介面的廣義代表圖； 第2圖顯示一適合與關於第1圖所述之系統共用之用 以加密聲頻/視頻內容的加密系統； 第3圖顯示根據本發明一實施例之代表性的已加密的 資料串流；以及 第4圖說明一使用實施本發明的系統。 -14 - (12) 1358932 【主要元件符號說明】
1 0 0數位視頻顯示器介面 1 〇 2 發射器 1 04接收器 1 06實體鍵路 1 0 8，1 1 0，1 1 2 資料串流 1 1 4 資料封包 1 1 6，1 1 8，1 20虛擬管路 2 0 0 加密系統 2 0 2 視頻源
2 0 4 接收器 2 0 6緩衝器 2 0 8 多工器 2 1 0封包化器 2 1 2 加密控制產生器單元 2 1 4 已加密資料串流 216時基恢復（TBR)單元 2 1 8解串列器. 2 2 0解碼器 2 2 2解封包器 2 2 8 解密引擎 2 3 0輔助通道 3 0 0 資料串流 -15 - (13)1358932 3 Ο 2 控制封包 3 Ο 4 標頭 3 〇 6視頻資料封包 4 0 0電腦系統 410中央處理單元 420隨機存取記憶體（RAM ) 42 5唯讀記憶體（ROM )
4 3 0週邊設備 440, 45 0主要儲存裝置 4 6 0 圖形控制器 470數位顯示器單元 490輸入/輸出裝置
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Claims (1)

1358932 附件3A :第093128747號申請專利範圍修正本 民國100年1〇月3曰修正 十、申請專利範圍 1. 一種以封包爲基礎之高頻寬版權保護方法，包含： 在一來源裝置形成一些資料封包； 藉著根據第一組加密/解密値加密該資料封包的一些 資料封包而形成第一群組的已加密之資料封包，其中在該 第一群組的已加密之資料封包中的已加密之資料封包的數 目小於形成於該來源裝置之資料封包的數目； 將來自該來源裝置之已加密及未加密之資料封包傳送 到與其；合的接收裝置； 使用該第一組加密/解密値解密該第一群組的已加密 資料封包；以及 由該接收裝置存取該已解密及未加密之資料封包。 2. 如申請專利範圍第1項所述之方法，其中該來源裝 置係一視頻源且其中該接收裝置係一視頻顯示器且其中該 些資料封包包括一些聲頻資料封包及一些視頻資料封包。 3. 如申請專利範圍第1項所述之方法，進一步包含： 形成與該第一組加密/解密値相關聯之第一控制資料 封包；以及 使用該第一控制資料封包以辨識該第一群組的已加密 之資料封包，其中該加密/解密値包括Vsyne、Hsyne及 CNTL3 〇 4. 如申請專利範圍第3項所述之方法，使用包括於該 I358P32 第一控制資料封包內之該第一組加密/解密値以解密該第 一組已加密之資料封包。 5. 如申請專利範圍第4項所述之方法，其中當該 CNTL3有作用時，貝！J該對應資料封包被加密。 6. —種用以在以封包爲基礎之系統提供高頻寬版權保 護之系統，包含： 來源單元，設置以提供一些資料封包； 接收單元，其耦合到該來源單元，設置以接收來自該 來源單元的資料封包； 加密單元，其耦到該來源單元，設置以加密從該來源 單元傳送到該接收單元之該資料封包被選取者； 解密單元，其耦合到該接收單元，設置以解密該已加 密之資料封包； 加密/解密値產生器，設置以提供一組加密及解密値 給該解密單元，該解密單元接著使用該解密値以解密任何 已適當加密之資料封包；以及 以該接收單元處理該已解密及未加密之資料封包。 7. 如申請專利範圍第6項所述之系統，其中該來源單 元係視頻來源，且其中該接收單元係視頻顯示器，且其中 資料封包的數目包括一些聲頻資料封包及一些視頻資料封 包。 8. 如申請專利範圍第7項所述之系統，其中該接收單 元係顯示器單元，設置以顯示該視頻資料封包被處理者。 9. 如申請專利範圍第8項所述之系統，其中該顯示器 1358932 單元包括一些揚聲器’設置以根據該聲頻資料封包被處理 者傳送聲頻信號。 10.如申請專利範圍第9項所述之系統，其中該組加 密/解密控制信號包括對應該視頻資料封包之Vsynt：h、 H s y n c h。 11·如申請專利範圍第10項所述之系統，其中該組加 密/解密控制進一步包括CNTL3以對該已被加密之資料 封包加旗標。 12.—種用以提供以封包爲基礎之高頻寬版權保護之 可被處理器執行之電腦程式產品’該電腦程式產品包含： 用以在來源裝置形成一些資料封包的電腦碼； 用以根據一組加密値加密該資料封包的一些資料封包 的電腦碼’其中已加密之資料封包的數目小於形成於該來 源裝置之資料封包的數目； 用以從該來源裝置傳送該已加密資料封包及該未加密 之資料封包到與其耦合之一接收裝置的電腦碼； 用以部分根據該加密値解密該已加密之資料封包的電 腦碼； 用以由該接收裝置處理該被解密之資料封包及該未加 密之資料封包的電腦碼，以及 用以儲存該電腦碼的電腦可判讀媒體。 1 3 ·如申請專利範圍第1 2項所述之電腦程式產品，其 中該來源裝置係一視頻源且其中該接收裝置係一視頻顯示 器且其中該些資料封包包括一些聲頻資料封包及一些視頻 ~ 3 - 1358932 資料封包。 14.如申請專利範圍第12項所述之電腦程式產品，其 中該加密値包括Hsyn<:、Hsync、以及CNTL3 » 1 5 .如申請專利範圍第1 4項所述之電腦程式產品，其 中各該資料封包係與一特定控制値CNTL3相關聯。 16.如申請專利範圍第15項所述之電腦程式產品，$ 中當該CNTL3有作用時，則該對應資料封包被加密^
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US20050069130A1 (en) 2005-03-31
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US7634090B2 (en) 2009-12-15

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