PROCEDURE AND DEVICE FOR PRODUCING A CODED UTILIZABLE DATA STREAM AND PROCEDURE AND DEVICE FOR DECODING A CODED UTILIZABLE DATA STREAM

CODING AND DECODING OF MULTIMEDIADATEN

Encryption and decryption of multi-media data

A method for ciphering multimedia includes the entering of an ciphering index in a definition data block of the multimedia data, this index pointing to an ciphering algorithm which is to be used. In response to the ciphering index in the definition data block one of a plurality of ciphering algorithms is selected. The multimedia data are ciphered using the selected ciphering algorithm. Various additional entries in the definition data block which is assigned to the multimedia data permit the clearing or enabling of a deciphering device, rapid access to a database of ciphered multimedia data and a customer- and data-specific use of the multimedia data while taking copyright aspects into account.

DEVICE AND PROCEDURE FOR PRODUCING A CODED AUDIO AND/OR VIDEO DATA STREAM

PROCEDURE AND DEVICE FOR PRODUCING A DATA STREAM AND A PROCEDURE AND DEVICE FOR PLAYING A DATA STREAM

VORRICHTUNG UND VERFAHREN ZUM ERZEUGEN EINES VERSCHLÜSSELTEN AUDIO- UND/ODER VIDEODATENSTROMS

PROCEDURE AND DEVICE FOR PRODUCING A CODED UTILIZABLE DATA STREAM AND PROCEDURE AND DEVICE FOR PLAYING A CODED UTILIZABLE DATA STREAM

Encryption and decryption of multi-media data

Multimedia data stream encryption method provides first section of useful data block which is not encrypted for providing preview or prelist function

The encryption method generates an initial block (12) for the encrypted useful data stream (10) and generates a useful data block (14) for the latter by providing a first section (20) containing the first part of the useful data sequence without encryption, followed by encrypted sections (16) containing the encrypted useful data sequence spaced apart by further section un-encrypted sections (18). Also included are Independent claims for the following: (a) a data stream encryption device; (b) a device for playback of an encrypted data strream ...

CIPHERING AND DECIPHERING OF MULTIMEDIA DATA

A data for encrypting multi-media data comprises the entry of an encryption index (18) into a determination data block (10, 30) of said data which indicates an encryption algorithm to be used. In reaction to the encryption index, an encryption algorithm is selected in the determination data block (10, 30) from a plurality of such algorithms. The multi-media data are encrypted using the selected encryption algorithm. Various other entries in the determination data block (10, 30), to which the multi-media data are allocated, free an encryption device and permit fast access to a databank of encrypted multi-media data and the customer and data-specific use of the multimedia data while respecting copyrights.

Encoding and decoding multimedia data

CIPHERING AND DECIPHERING OF MULTIMEDIA DATA

A data for encrypting multi-media data comprises the entry of an encryption index (18) into a determination data block (10, 30) of said data which indicates an encryption algorithm to be used. In reaction to the encryption index, an encryption algorithm is selected in the determination data block (10, 30) from a plurality of such algorithms. The multi-media data are encrypted using the selected encryption algorithm. Various other entries in the determination data block (10, 30), to which the multi-media data are allocated, free an encryption device and permit fast access to a databank of encrypted multi-media data and the customer and data-specific use of the mul ti- media data while respecting copyrights.

Method of encoding and decoding of multimedia data with definition and multimedia data blocks

The method involves inserting definition and multimedia code indices into the definition block, inserting a trigger index into the definition block identifying a decoder for the multimedia data for a defined period, selecting encoding algorithms based on the definition data, encoding the blocks and packing the multimedia data in a main definition data packet and a multimedia packet to produce an encoded data flow. The main definition packet contains the definition block's definition data encoding index. The multimedia data definition packet contains the definition block's multimedia encoding index. The multimedia data packet contains at least part of the multimedia data block ...

VERFAHREN UND VORRICHTUNG ZUM ERZEUGEN EINES DATENSTROMS UND VERFAHREN UND VORRICHTUNG ZUM ABSPIELEN EINES DATENSTROMS

VERSCHLÜSSELUNG UND ENTSCHLÜSSELUNG VON MULTIMEDIADATEN

Method and device for producing an encrypted payload data stream and method and device for decrypting an encrypted payload data stream

In a method for producing an encrypted method payload data stream comprising a header and a block containing encrypted payload data, a payload data key for a payload data encryption algorithm for encrypting payload data is generated. The payload data is encrypted using the generated payload data key and the payload data encryption algorithm to obtain the block containing the encrypted payload data of the payload stream. A part of the payload data stream is processed to deduce information marking the part of the payload data stream. The information is linked with the payload data by means of an invertible logic linkage to obtain a basic value. This basic value is finally encrypted using a key of two keys being different from each other by an asymmetrical encryption method, the two different keys being the public and the private keys respectively for the asymmetrical encryption method to obtain an output value being an encrypted version of the payload data key. The output value is finally ...

Encryption device for audio and/or video signals uses coder providing data stream with pre-determined syntax and encryption stage altering useful data in data stream without altering syntax

The encryption device provides an encrypted data stream from audio and/or video signals using a coder (204-210) which provides a data stream with a pre-defined syntax, coupled to an encryption stage (18). This uses an encryption key (k) for scrambling the output signal from the coder, so that the encrypted data stream contains useful information which differs from the useful information in the data stream at the output of the coder while maintaining the pre-defined syntax. Also included are Independent claims for the following: (a) a de-encryption device; (b) an encryption method for an audio and/or video signal; (c) a de-encryption method for an encrypted audio and/or video signal ...

VERFAHREN UND VORRICHTUNG ZUM ERZEUGEN EINES VERSCHLÜSSELTEN NUTZDATENSTROMS UND VERFAHREN UND VORRICHTUNG ZUM ENTSCHLÜSSELN EINES VERSCHLÜSSELTEN NUTZDATENSTROMS

VERFAHREN UND VORRICHTUNG ZUM ERZEUGEN EINES VERSCHLÜSSELTEN NUTZDATENSTROMS UND VERFAHREN UND VORRICHTUNG ZUM ABSPIELEN EINES VERSCHLÜSSELTEN NUTZDATENSTROMS

Device and method for producing an encoded audio and/or video data stream

An apparatus for generating an encrypted data stream representing an audio and/or video signal comprises an encoder for encoding an input signal to generate a data stream with a predefined data stream syntax as output signal. The apparatus further comprises an encryption means coupled with the decoder in order to influence encoder internal data and/or the output signal of the encoder in a uniquely reversible manner based on a key such that the generated encrypted data stream comprises payload information differing from payload information of a data stream that would be generated by the apparatus without the presence of an encryption means and that the generated encrypted data stream comprises the predefined data stream syntax. Thereby, a flexible data stream encryption is achieved, wherein the degree of encryption can be freely selected such that the owner of a decoder who does not possess the key, still obtains a rough idea of the audio and/or video signal which might cause him to buy ...

Verschlüsselung und Entschlüsselung von Multimediadaten

A data for encrypting multi-media data comprises the entry of an encryption index (18) into a determination data block (10, 30) of said data which indicates an encryption algorithm to be used. In reaction to the encryption index, an encryption algorithm is selected in the determination data block (10, 30) from a plurality of such algorithms. The multi-media data are encrypted using the selected encryption algorithm. Various other entries in the determination data block (10, 30), to which the multi-media data are allocated, free an encryption device and permit fast access to a databank of encrypted multi-media data and the customer and data-specific use of the multi-media data while respecting copyrights.

Second data stream generation method from first stream including start and functional audiovisual, data blocks, involves insertion of origination information

The first start block (12) is extracted from the first data stream. A second starting block is generated for the second data stream. At least some of the first starting block is entered into the second start block. This entry includes origination information, concerning the functional data. A second functional data block is generated, containing the same functional data as that in the first stream, to obtain the second data stream Independent claim are included for equipment suitable for executing the method.

Generating encoded useful data flow involves producing encoded version of useful data key using asymmetrical encoding and entering in useful data stream header block

The method involves generating a useful data key for a useful data encoding algorithm; encoding useful data using the key and algorithm to produce an encoded section of a useful data block (14); processing part of the useful data stream (10) to derive information identifying the useful data stream; combining the information with the useful data key to produce a base value; encoding the base value using one of two different keys using asymmetrical encoding, whereby the keys are the public and private keys for the asymmetrical encoding, to produce the encoded version of the useful data key; and entering the value in the header block (12) of the useful data stream. An Independent claim is also included for an arrangement for generating an encoded useful data flow.

Encryption and decryption of multi-media data

A method for ciphering multimedia includes the entering of an ciphering index in a definition data block of the multimedia data, this index pointing to an ciphering algorithm which is to be used. In response to the ciphering index in the definition data block one of a plurality of ciphering algorithms is selected. The multimedia data are ciphered using the selected ciphering algorithm. Various additional entries in the definition data block which is assigned to the multimedia data permit the clearing or enabling of a deciphering device, rapid access to a database of ciphered multimedia data and a customer- and data-specific use of the multimedia data while taking copyright aspects into account.

Method and device for generating a data stream and method and device for playing back a data stream

In a method for generating a second data stream from a first data stream, which comprises a first header and a first payload data block with payload data, the first header is initially extracted from the first data stream. Subsequently the second header for the second data stream is generated. Then, at least a part of the first header is entered into the second header, the part of the first header including information, which allows conclusions as to the origin of the payload data. Finally, the second payload data block is generated, which comprises the same payload data, so as to obtain the complete second data stream. The method according to the invention enables device-specific encrypting of payload data, a flexible, device-specific "copy" for other devices of a user and, in particular, complete documentation of the origin of the present copy, such that effective copyright protection may be realized.

Encryption and decryption of multimedia data

En fremgangsmåte for kryptering av multimediadata omfatter innlegging av en krypteringsindeks (18) i en bestemmelses- datablokk (10, 30) for de nevnte data, hvor indeksen indikerer en krypterings- algoritme som skal benyttes. Som reaksjon på krypteringsindeksen utvelges en krypteringsalgoritme i bestemmelsesdata- blokken (10, 30) fra et antall slike algoritmer. Multiraediadataene krypteres ved benyttelse av den utvalgte kryp- teringsalgoritme. Forskjellige andre inn- legginger i bestemmelsesdatablokken (10, 30) til hvilken multimediadataene er til- delt, frigjør en dekrypteringsanordning og tillater rask tilgang til en databank av krypterte multimediadata, og en kunde- og dataspesifikk anvendelse av multi- mediadataene samtidig som opphavsretter respekteres.

Method and device for generating a data stream and method and device for playing back a data stream

The invention relates to a method for generating a second data stream from a first data stream containing a first start block and a first user data block comprising user data. According to said method the first start block is extracted (116) from the first data stream. Next the second start block for the second data stream is generated (118), after which at least a part of the first start block, which part contains information making it possible to trace the origins of the user data, is integrated (120) into the second start block. Finally the second user data block containing the same user data is generated (122) so that a complete second data stream can be obtained. The method provided for by the invention allows for the device-specific encoding of user data, makes it possible to obtain a flexible device-specific copy for other devices of a user and, notably, provides complete references as to the origins of a copy, which in turn permits effective copyright protection.

Verfahren und vorrichtung zum erzeugen eines datenstroms und verfahren und vorrichtung zum abspielen eines datenstroms

Verfahren und vorrichtung zum erzeugen eines verschlüsselten nutzdatenstroms und verfahren und vorrichtung zum abspielen eines verschlüsselten nutzdatenstroms

Vorrichtung und verfahren zum erzeugen eines verschlüsselten audio- und/oder videodatenstroms

Vorrichtung und verfahren zum erzeugen eines verschlüsselten audio- und/oder videodatenstroms

Eine Vorrichtung (10) zum Erzeugen eines verschlüsselten Datenstroms, der ein Audio- und/oder Videosignal darstellt, umfasst einen Codierer (16) zum Codieren eines Eingangssignals (12), um als Ausgangssignal einen Datenstrom mit einer vordefinierten Datenstromsyntax zu erzeugen. Die Vorrichtung umfasst ferner eine Verschlusselungseinrichtung (18), die mit dem Codierer (16) gekoppelt ist, um codiererinterne Daten (20a) und/oder das Ausgangssignal (20b) des Codierers auf eindeutig umkehrbare Art und Weise auf der Basis eines Schlüssels zu beeinflussen, derart, dass der erzeugte verschlüsselte Datenstrom Nutzinformationen aufweist, die sich von Nutzinformationen eines Datenstroms unterscheiden, der durch die Vorrichtung ohne Vorhandensein der Verschlüsselungseinrichtung erzeugt werden würde, und dass der erzeugte verschlüsselte Datenstrom die vordefinierte Datenstromsyntax aufweist. Damit wird eine flexible Datenstromverschlüsselung erreicht, wobei der Grad der Verschlüsselung beliebig einstellbar ist, derart, dass ein Besitzer eines Decodierers, der nicht im Besitz des Schlüssels ist, noch einen groben Eindruck des Audio- und/oder Videosignals erhält, was ihn vielleicht dazu veranlasst, den Schlüssel zu kaufen, um das Audio- und/oder Videosignal in voller Qualität hören bzw. betrachten zu können. Das codiererspezifische Verschlüsselungs- bzw. Entschlüsselungskonzept kann mit geringem Aufwand in bereits bestehende Codierer/Decodierer implementiert werden.

Vorrichtung und verfahren zum erzeugen eines verschlüsselten audio- und/oder videodatenstroms

Verfahren und vorrichtung zum erzeugen eines verschlüsselten nutzdatenstroms und verfahren und vorrichtung zum entschlüsseln eines verschlüsselten nutzdatenstroms

Verfahren und vorrichtung zum erzeugen eines datenstroms und verfahren und vorrichtung zum abspielen eines datenstroms

Bei einem Verfahren zum Erzeugen eines zweiten Datenstroms aus einem ersten Datenstrom, der einen ersten Anfangsblock und einen ersten Nutzdatenblock mit Nutzdaten aufweist, wird zunächst der erste Anfangsblock aus dem ersten Datenstrom extrahiert (116). Hierauf wird der zweite Anfangsblock für den zweiten Datenstrom erzeugt (118). Anschließend wird zumindest ein Teil des ersten Anfangsblocks in den zweiten Anfangsblock eingetragen (120), wobei der Teil des ersten Anfangsblocks Informationen umfaßt, die Rückschlüsse auf die Herkunft der Nutzdaten gestatten. Schließlich wird der zweite Nutzdatenblock erzeugt (122), der dieselben Nutzdaten aufweist, um den kompletten zweiten Datenstrom zu erhalten. Das erfindungsgemäße Verfahren ermöglicht eine gerätespezifische Verschlüsselung von Nutzdaten, eine flexible gerätespezifische 'Kopie' für andere Geräte eines Benutzers und insbesondere eine lückenlose Dokumentation der Herkunft der vorliegenden Kopie, derart, daß ein effektiver Urheberrechtsschutz verwirklicht werden kann.

Verfahren und vorrichtung zum erzeugen eines datenstroms und verfahren und vorrichtung zum abspielen eines datenstroms

Bei einem Verfahren zum Erzeugen eines zweiten Datenstroms aus einem ersten Datenstrom, der einen ersten Anfangsblock und einen ersten Nutzdatenblock mit Nutzdaten aufweist, wird zunächst der erste Anfangsblock aus dem ersten Datenstrom extrahiert (116). Hierauf wird der zweite Anfangsblock für den zweiten Datenstrom erzeugt (118). Anschließend wird zumindest ein Teil des ersten Anfangsblocks in den zweiten Anfangsblock eingetragen (120), wobei der Teil des ersten Anfangsblocks Informationen umfaßt, die Rückschlüsse auf die Herkunft der Nutzdaten gestatten. Schließlich wird der zweite Nutzdatenblock erzeugt (122), der dieselben Nutzdaten aufweist, um den kompletten zweiten Datenstrom zu erhalten. Das erfindungsgemäße Verfahren ermöglicht eine gerätespezifische Verschlüsselung von Nutzdaten, eine flexible gerätespezifische 'Kopie' für andere Geräte eines Benutzers und insbesondere eine lückenlose Dokumentation der Herkunft der vorliegenden Kopie, derart, daß ein effektiver Urheberrechtsschutz verwirklicht werden kann.

Verschlüsselung und entschlüsselung von multimediadaten