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Browse by Category: Main > Information Technology
Class Information
Number: 380/237
Name: Cryptography > Video cryptography > Video electric signal modification (e.g., scrambling) > Modifying accompanying audio signal > Including digital audio
Description: Subject matter wherein the modified audio is transmitted as a series of pulses.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8589171 System and method for custom marking a media file for file matching Nov. 19, 2013
8538018 Methods and apparatus for mixing encrypted data with unencrypted data Sep. 17, 2013
8433915 Selective security masking within recorded speech Apr. 30, 2013
8424083 Controlling activation of an application program in an audio signal processing system Apr. 16, 2013
8345870 Method and apparatus for encrypting encoded audio signal Jan. 1, 2013
RE43554 Method of converting audio data for a portable device and reproducing the converted audio data Jul. 24, 2012
8214908 Electronic musical apparatus, control method therefor, and program for implementing the control method Jul. 3, 2012
RE43439 Method of converting audio data for a portable device and reproducing the converted audio data May. 29, 2012
8171561 Secure personal content server May. 1, 2012
8127361 Hierarchical scheme for secure multimedia distribution Feb. 28, 2012
8098821 Data encryption/decryption method and mobile terminal for use in the same Jan. 17, 2012
RE42813 Method of converting audio data for a portable device and reproducing the converted audio data Oct. 4, 2011
7996230 Selective security masking within recorded speech Aug. 9, 2011
7991997 System and method for providing searchable data transport stream encryption Aug. 2, 2011
RE42399 Method of converting audio data for a portable device and reproducing the converted audio data May. 24, 2011
RE42171 Digital data file encryption apparatus and method and recording medium for recording digital data file encryption program thereon Feb. 22, 2011
7886152 Method and device for embedding watermark information and method and device for extracting embedded watermark information Feb. 8, 2011
RE42106 Digital data file encryption apparatus and method and recording medium for recording digital data file encryption program thereon Feb. 1, 2011
RE42107 Digital data file encryption apparatus and method and recording medium for recording digital data file encryption program thereon Feb. 1, 2011
RE41942 Digital data file encryption apparatus and method and recording medium for recording digital data file encryption program thereon Nov. 16, 2010
7831832 Digital goods representation based upon matrix invariances Nov. 9, 2010
7802101 System and method of retrieving a watermark within a signal Sep. 21, 2010
7783014 Decryption and decompression based audio system Aug. 24, 2010
7529941 System and method of retrieving a watermark within a signal May. 5, 2009
7475246 Secure personal content server Jan. 6, 2009
7471479 System for protection against copying on magnetic tape recorders Dec. 30, 2008
7424739 On-machine communication verification Sep. 9, 2008
7412606 Copy protection using detailed copy control information Aug. 12, 2008
7397920 Information processing device and method, and recording medium Jul. 8, 2008
7370204 Watermark data embedding apparatus and extracting apparatus May. 6, 2008
7319756 Audio coding Jan. 15, 2008
7277766 Method and system for analyzing digital audio files Oct. 2, 2007
7245721 Data encoding/decoding device and apparatus using the same Jul. 17, 2007
7203312 Data reproduction apparatus and data reproduction module Apr. 10, 2007
7167561 Recording apparatus, recording method, reproducing apparatus, and reproducing method Jan. 23, 2007
7155013 Recording apparatus, recording method, reproducing apparatus, and reproducing method Dec. 26, 2006
7130426 Digital data file encryption apparatus and method and recording medium for recording digital data file encryption program thereon Oct. 31, 2006
7124444 Method of converting audio data for a portable device and reproducing the converted audio data Oct. 17, 2006
6978377 Copy protection using detailed copy control information Dec. 20, 2005
6937728 Verifiable anonymous channel Aug. 30, 2005
6904591 Software development system for editable executables Jun. 7, 2005
6836844 Information signal copy managing method, information signal recording method, information signal output apparatus, and recording medium Dec. 28, 2004
6633982 Method and process for managing ultra secure electronic distribution of digital movies to commercial exhibitors Oct. 14, 2003
6597789 Video/audio scrambling with single conversion tuners Jul. 22, 2003
6425082 Watermark applied to one-dimensional data Jul. 23, 2002
6330334 Method and system for information dissemination using television signals Dec. 11, 2001
6286101 Central processing unit and microcomputer system having an internal operation unit for cryptographic Sep. 4, 2001
6222924 Scrambling of digital media objects in connection with transmission and storage Apr. 24, 2001
6185687 Signal reproducing/recording/transmitting method and apparatus and signal record medium Feb. 6, 2001
6061793 Method and apparatus for embedding data, including watermarks, in human perceptible sounds May. 9, 2000

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