TW200705393A - Device and a method for embedding a secondary information signal in the channel data stream of a primary information signal using scrambling - Google Patents

Device and a method for embedding a secondary information signal in the channel data stream of a primary information signal using scrambling

Info

Publication number
TW200705393A
TW200705393A TW095121769A TW95121769A TW200705393A TW 200705393 A TW200705393 A TW 200705393A TW 095121769 A TW095121769 A TW 095121769A TW 95121769 A TW95121769 A TW 95121769A TW 200705393 A TW200705393 A TW 200705393A
Authority
TW
Taiwan
Prior art keywords
information signal
scrambling
data stream
channel data
modulation
Prior art date
Application number
TW095121769A
Other languages
Chinese (zh)
Inventor
Peter Bentvelsen
Jo Frisson
Engelbertus Petrus Gerardus Maria Kramer
Original Assignee
Koninkl Philips Electronics Nv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of TW200705393A publication Critical patent/TW200705393A/en

Links

Classifications

    • 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
    • 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
    • G11B20/00485—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 characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier
    • G11B20/00557—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 characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier wherein further management data is encrypted, e.g. sector headers, TOC or the lead-in or lead-out areas
    • 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
    • G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
    • G11B20/00579—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the data encoding, e.g., modulation schemes violating run-length constraints, causing excessive DC content, or involving uncommon codewords or sync patterns
    • 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
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
    • 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
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B2020/1264—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting concerns a specific kind of data
    • G11B2020/1288—Formatting by padding empty spaces with dummy data, e.g. writing zeroes or random data when de-icing optical discs
    • 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
    • G11B2220/2541—Blu-ray discs; Blue laser DVR discs

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

The present invention relates to a device and a corresponding method for embedding a secondary information signal (S) in the channel data stream (C1) of a primary information signal (P) to obtain a modulation stream (M). In order to avoid the formation of regular modulation patterns which might lead to unwanted frequency peaks in the power spectrum of the modulation signal, a device is proposed comprising: - a scrambling unit (11) for scrambling the secondary channel bits of said secondary information signal (S) according to a scrambling rule, and - a setting unit (12) for setting the polarity of said channel data stream (C1) at predetermined positions based on the binary value of the scrambled secondary channel bits (C2). The present invention relates also to a device and a corresponding method for extracting from a modulation stream (M) a secondary information signal (S) embedded in scrambled form in the channel data stream (C1) of a primary information signal (P), and to a record carrier and a signal carrying such a modulation stream.
TW095121769A 2005-06-21 2006-06-16 Device and a method for embedding a secondary information signal in the channel data stream of a primary information signal using scrambling TW200705393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05105493 2005-06-21

Publications (1)

Publication Number Publication Date
TW200705393A true TW200705393A (en) 2007-02-01

Family

ID=37570817

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095121769A TW200705393A (en) 2005-06-21 2006-06-16 Device and a method for embedding a secondary information signal in the channel data stream of a primary information signal using scrambling

Country Status (2)

Country Link
TW (1) TW200705393A (en)
WO (1) WO2006136986A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4521457B2 (en) * 2008-11-28 2010-08-11 株式会社東芝 Information transmission system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8303859A (en) * 1983-11-10 1985-06-03 Philips Nv SELECTIVE SCRAMBLING AT COMPACT DISC.
US5949750A (en) * 1993-11-30 1999-09-07 Victor Company Of Japan, Ltd. Method and apparatus for recording an information signal with scrambling thereof
WO1996027191A1 (en) * 1995-02-28 1996-09-06 Isis Innovation Limited Covert identification
AU2001275709B2 (en) * 2000-07-28 2006-11-09 Rovi Europe Limited Copy protection for optical discs
WO2002015185A1 (en) * 2000-08-14 2002-02-21 Koninklijke Philips Electronics N.V. Method of device for adding or extracting a secondary information signal to/from a rll code sequence
KR101016988B1 (en) * 2003-02-20 2011-02-25 코닌클리케 필립스 일렉트로닉스 엔.브이. Information carrier comprising access information
JP2007519150A (en) * 2004-01-19 2007-07-12 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Method for embedding a secondary information signal in a channel data stream

Also Published As

Publication number Publication date
WO2006136986A3 (en) 2007-04-12
WO2006136986A2 (en) 2006-12-28

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