DE68921692D1 - Signal-Identifikationssystem. - Google Patents

Signal-Identifikationssystem.

Info

Publication number
DE68921692D1
DE68921692D1 DE68921692T DE68921692T DE68921692D1 DE 68921692 D1 DE68921692 D1 DE 68921692D1 DE 68921692 T DE68921692 T DE 68921692T DE 68921692 T DE68921692 T DE 68921692T DE 68921692 D1 DE68921692 D1 DE 68921692D1
Authority
DE
Germany
Prior art keywords
frequency bands
identification system
sequence
signal identification
code
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
DE68921692T
Other languages
English (en)
Other versions
DE68921692T2 (de
Inventor
Stuart John Best
Nigel Johnson
Adrian Miles Sandford
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Central Research Laboratories Ltd
Original Assignee
Thorn EMI PLC
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 Thorn EMI PLC filed Critical Thorn EMI PLC
Application granted granted Critical
Publication of DE68921692D1 publication Critical patent/DE68921692D1/de
Publication of DE68921692T2 publication Critical patent/DE68921692T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
    • H04H20/30—Arrangements for simultaneous broadcast of plural pieces of information by a single channel
    • H04H20/31—Arrangements for simultaneous broadcast of plural pieces of information by a single channel using in-band signals, e.g. subsonic or cue signal
    • 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
    • G11B20/00884—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm
    • G11B20/00891—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm embedded in audio data

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Holo Graphy (AREA)
  • Detergent Compositions (AREA)
DE68921692T 1988-10-25 1989-10-23 Signal-Identifikationssystem. Expired - Fee Related DE68921692T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888824969A GB8824969D0 (en) 1988-10-25 1988-10-25 Identification codes

Publications (2)

Publication Number Publication Date
DE68921692D1 true DE68921692D1 (de) 1995-04-20
DE68921692T2 DE68921692T2 (de) 1995-10-05

Family

ID=10645756

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68921692T Expired - Fee Related DE68921692T2 (de) 1988-10-25 1989-10-23 Signal-Identifikationssystem.

Country Status (6)

Country Link
US (1) US5113437A (de)
EP (1) EP0366381B1 (de)
JP (1) JP3212988B2 (de)
AT (1) ATE120059T1 (de)
DE (1) DE68921692T2 (de)
GB (1) GB8824969D0 (de)

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Also Published As

Publication number Publication date
GB8824969D0 (en) 1988-11-30
JP3212988B2 (ja) 2001-09-25
DE68921692T2 (de) 1995-10-05
EP0366381B1 (de) 1995-03-15
EP0366381A3 (de) 1991-09-25
EP0366381A2 (de) 1990-05-02
JPH02162569A (ja) 1990-06-22
ATE120059T1 (de) 1995-04-15
US5113437A (en) 1992-05-12

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