JP4322695B2 - スクランブルデジタルデータを記録する方法、記録媒体及びかかるデータの読み取り方法 - Google Patents
スクランブルデジタルデータを記録する方法、記録媒体及びかかるデータの読み取り方法 Download PDFInfo
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- JP4322695B2 JP4322695B2 JP2004033668A JP2004033668A JP4322695B2 JP 4322695 B2 JP4322695 B2 JP 4322695B2 JP 2004033668 A JP2004033668 A JP 2004033668A JP 2004033668 A JP2004033668 A JP 2004033668A JP 4322695 B2 JP4322695 B2 JP 4322695B2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4135—Peripherals receiving signals from specially adapted client devices external recorder
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/04—Electrically-operated educational appliances with audible presentation of the material to be studied
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
- G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
-
- 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
-
- 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
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
-
- 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
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2545—CDs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
-
- 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
- H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
- H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/781—Television signal recording using magnetic recording on disks or drums
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/782—Television signal recording using magnetic recording on tape
- H04N5/783—Adaptations for reproducing at a rate different from the recording rate
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
- H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
Description
(このパケットについて事実上のPCR値に対応する)データブロックのデータパケットnのスタンプSTAMPnを決定するものと想定し、PCRの値はデータブロックのパケットにおいて発見されるものと想定する。このとき、スタンプの値は以下のように計算される。
少なくとも2つのPCR値を含むデータブロックのパケットnのスタンプSTAMPnの値を決定するために、以下の計算を実行する。
2:表示装置
3:デジタルバス
4,6:記録装置
5,7:表示装置
42,62:ECM検出モジュール
43,63:ECMテーブル作成モジュール
44:パケットカウンタ
52,72:データブロック選択モジュール
53,78:データブロックデスクランブルモジュール
54:最初と最後のパケット番号選択モジュール
55,75:ECMサーチモジュール
57,77:ECM暗号解読モジュール
58,79:デコードモジュール
59,80:ディスプレイ
64:PCR検出モジュール
66:ETS計算モジュール
73:PCR検出モジュール
74:PCR値/データブロック計算モジュール
Claims (3)
- データ記録媒体に記録されるスクランブルされたデジタルデータを読取る方法であって、
前記データ記録媒体は、
データパケットと多重化されるコントロールパケットであって、デジタルデータの一部をデスクランブルするための少なくとも1つのキーをそれぞれが含むコントロールパケットを備えるスクランブルされたデジタルデータストリームと、
前記データストリームとは別に記憶されるテーブルであって、少なくとも1つのコントロールパケットと、それぞれのコントロールパケットについて、前記データストリームにおける前記コントロールパケットの位置を示すインデックスであって、前記データストリームにおける前記コントロールパケットの直前及び前記コントロールパケットの直後に送信されるクロック基準値に関して前記データストリームにおける前記コントロールパケットの位置を定義するタイムスタンプを含むインデックスとを含むテーブルとを有し、
当該方法は、
(i)記録されたデータのストリームからデータのブロックを選択するステップと、
(j)前記データブロックから、少なくとも1つのクロック基準値を抽出するステップと、
(k)抽出されたクロック基準値の関数として、前記ステップ(i)で選択された前記データブロックに含まれる最初のパケットと最後のパケットに関連するタイムスタンプを推定するステップと、
(l)前記ステップ(k)で推定されたタイムスタンプを使用して、このデータブロックに対応する少なくとも1つのコントロールパケットを前記データと記録されるテーブルから抽出するステップと、
(m)前記コントロールパケットから、デスクランブルキーを抽出するステップと、
(n)前記デスクランブルキーを使用して、前記データブロックをデスクランブルして、その内容を明確な表示でユーザに供給するステップと、
を備える方法。 - 前記ステップ(i)は、
前記データブロックの最初のパケットに関連するタイムスタンプよりも小さな最も大きなインデックスを有するコントロールパケットと、前記データブロックの最後のパケットに関連するタイムスタンプよりも小さな最も大きなインデックスを有するコントロールパケットとの間にあるコントロールパケットであって、前記データブロックの最初のパケットに関連するタイムスタンプよりも小さな最も大きなインデックスを有するコントロールパケットと、前記データブロックの最後のパケットに関連するタイムスタンプよりも小さな最も大きなインデックスを有するコントロールパケットを含むコントロールパケットを抽出するステップを含む、
請求項1記載の方法。 - 前記コントロールパケットからデスクランブルキーを抽出する前記ステップ(m)は、前記コントロールパケット又は前記デスクランブルキーを暗号解読するステップを備える、
請求項1記載の方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0301857 | 2003-02-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2004247036A JP2004247036A (ja) | 2004-09-02 |
JP2004247036A5 JP2004247036A5 (ja) | 2007-03-29 |
JP4322695B2 true JP4322695B2 (ja) | 2009-09-02 |
Family
ID=32669378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004033668A Expired - Fee Related JP4322695B2 (ja) | 2003-02-11 | 2004-02-10 | スクランブルデジタルデータを記録する方法、記録媒体及びかかるデータの読み取り方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US7869596B2 (ja) |
EP (1) | EP1447983B1 (ja) |
JP (1) | JP4322695B2 (ja) |
KR (1) | KR101004248B1 (ja) |
CN (1) | CN100477771C (ja) |
DE (1) | DE602004024839D1 (ja) |
MY (1) | MY140600A (ja) |
TW (1) | TWI332800B (ja) |
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-
2004
- 2004-01-22 EP EP04100220A patent/EP1447983B1/en not_active Expired - Fee Related
- 2004-01-22 DE DE602004024839T patent/DE602004024839D1/de not_active Expired - Lifetime
- 2004-02-06 TW TW093102707A patent/TWI332800B/zh not_active IP Right Cessation
- 2004-02-10 MY MYPI20040404A patent/MY140600A/en unknown
- 2004-02-10 JP JP2004033668A patent/JP4322695B2/ja not_active Expired - Fee Related
- 2004-02-11 CN CNB2004100053683A patent/CN100477771C/zh not_active Expired - Fee Related
- 2004-02-11 US US10/776,560 patent/US7869596B2/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
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EP1447983A1 (en) | 2004-08-18 |
CN1522063A (zh) | 2004-08-18 |
US7869596B2 (en) | 2011-01-11 |
CN100477771C (zh) | 2009-04-08 |
MY140600A (en) | 2009-12-31 |
JP2004247036A (ja) | 2004-09-02 |
KR20040073347A (ko) | 2004-08-19 |
EP1447983B1 (en) | 2009-12-30 |
DE602004024839D1 (de) | 2010-02-11 |
KR101004248B1 (ko) | 2010-12-24 |
US20050105886A1 (en) | 2005-05-19 |
TWI332800B (en) | 2010-11-01 |
TW200423743A (en) | 2004-11-01 |
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