Granted Patent B2

US 12,652,418 · App. 19/301,754 · Granted Jun 9, 2026

Inventors: Jonathan Pfaff (Berlin, DE); Tobias Hinz (Berlin, DE); Karsten Suehring (Berlin, DE); Heiko Schwarz (Berlin, DE); Karsten Grueneberg (Berlin, DE); Robert Skupin (Berlin, DE); Yago Sánchez De La Fuente (Berlin, DE); Cornelius Hellge (Berlin, DE); Thomas Schierl (Berlin, DE); Detlev Marpe (Berlin, DE); Thomas Wiegand (Berlin, DE)

Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

H04L9/3247H04N19/129H04N19/13H04N19/176H04N19/18H04N19/50H04N19/60H04N19/70

Abstract

Claims (53)

1 . An apparatus for decoding an audio data stream, having an audio signal encoded thereinto, wherein the apparatus comprises:

a memory; and

one or more processors, configured for:

decoding a syntax structure from the audio data stream, which comprises information for checking the audio data stream for trustworthiness based on a predetermined portion of the audio data stream, the predetermined portion being to be subjected to a hash function, or being to be used to derive data to be subjected to a hash function, for deriving a hash value to serve for checking the trustworthiness of the audio data stream,

decoding a unique identifier, or a reference which points to a unique identifier, from the audio data stream, the unique identifier uniquely identifying a media asset comprising a plurality of media components to which the predetermined portion belongs;

decoding an indication of a digital signature from the audio data stream, the digital signature being based on a combination of the predetermined portion, or the hash value, and the unique identifier.

2 . The apparatus according to claim 1 , wherein the unique identifier is signaled in the syntax structure.

3 . The apparatus according to claim 1 , wherein the checking the audio data stream for trustworthiness comprises

checking whether a combination of the hash value and the unique identifier fits to the digital signature to determine whether the audio data stream is trustworthy.

4 . The apparatus according to claim 3 , wherein the checking whether the combination of the hash value and the unique identifier fits to the digital signature comprises

decrypting the digital signature to obtain a check value; and

checking whether the combination of the hash value and the unique identifier matches the check value.

5 . The apparatus according to claim 1 , wherein the checking whether the combination of the hash value and the unique identifier fits to the digital signature comprises

forming a verification string based on the hash value and the unique identifier,

comparing the verification string to the digital signature using a public key.

6 . The apparatus according to claim 1 , configured for

deriving an indication of an external resource for retrieving the public key from the audio data stream, and deriving the public key from the external resource.

7 . The apparatus according to claim 6 , configured for deriving the unique identifier from the external resource.

8 . The apparatus according to claim 1 , wherein the checking the audio data stream for trustworthiness comprises checking, whether the unique identifier matches a unique identifier associated with one or more further media components.

9 . The apparatus according to claim 1 , configured for deriving the digital signature from the audio data stream.

10 . The apparatus according to claim 1 , configured for deriving the unique identifier from a payload packet signaled in the audio data stream.

11 . The apparatus according to claim 10 , wherein the payload packet further comprises one or more of

an indication of the hash function,

an indication of a number of portions of the audio data stream, for which a digital signature for verifying the trustworthiness of the audio data stream is available,

an indication, which indicates a manner for retrieving a public key for checking whether the combination of the hash value and the unique identifier fits to the digital signature.

12 . The apparatus according to claim 1 , wherein the checking the audio data stream for trustworthiness comprises

performing the checking the audio data stream on trustworthiness sequentially with respect to a plurality of portions of the audio data stream, and further by

subjecting a predetermined portion of the audio data stream, or data derived therefrom, to a hash function to obtain a hash value;

subjecting a further portion of the audio data stream, or data derived therefrom, to the hash function to obtain a further hash value;

checking whether a combination of the hash value, the further hash value, and the unique identifier fits to the digital signature.

13 . The apparatus according to claim 1 , configured for checking whether a combination of multiple pieces of information comprising the hash value, the unique identifier, and an indication of the hash function fits to the digital signature to determine whether the audio data stream is trustworthy.

14 . The apparatus according to claim 1 , configured for

deriving the predetermined portion from the audio data stream, and

providing the predetermined portion, the hash value, and the unique identifier to the checking the audio data stream for trustworthiness.

15 . The apparatus according to claim 1 , configured for checking the audio data stream on trustworthiness, wherein the apparatus is configured for

subjecting the predetermined portion of the audio data stream, or data derived therefrom, to the hash function to obtain the hash value;

obtaining the unique identifier, which uniquely identifies a media asset to which the predetermined portion belongs;

obtaining the digital signature based on the audio data stream; and

checking whether the combination of the hash value and the unique identifier fits to the digital signature to determine whether the audio data stream is trustworthy.

16 . An apparatus for rendering an audio data stream having an audio signal encoded thereinto checkable on trustworthiness, wherein the apparatus comprises:

a memory; and

one or more processors, configured for

inserting a syntax structure into the audio data stream, which comprises information for checking the audio data stream for trustworthiness based on a predetermined portion of the audio data stream, the predetermined portion being to be subjected to a hash function, or being to be used to derive data to be subjected to a hash function, for deriving a hash value to serve for checking the trustworthiness of the audio data stream,

inserting a unique identifier, or a reference which points to a unique identifier, into the audio data stream, the unique identifier uniquely identifying a media asset comprising a plurality of media components to which the predetermined portion belongs;

inserting an indication of a digital signature into the audio data stream, the digital signature being based on a combination of the predetermined portion, or the hash value, and the unique identifier.

17 . A method for decoding an audio data stream, having an audio signal encoded thereinto, wherein the method comprises

decoding a syntax structure from the audio data stream, which comprises information for checking the audio data stream for trustworthiness based on a predetermined portion of the audio data stream, the predetermined portion being to be subjected to a hash function, or being to be used to derive data to be subjected to a hash function, for deriving a hash value to serve for checking the trustworthiness of the audio data stream,

decoding a unique identifier, or a reference which points to a unique identifier, from the audio data stream, the unique identifier uniquely identifying a media asset comprising a plurality of media components to which the predetermined portion belongs;

decoding an indication of a digital signature from the audio data stream, the digital signature being based on a combination of the predetermined portion, or the hash value, and the unique identifier.

18 . A non-transitory digital storage medium having stored thereon an audio data stream, wherein the audio data stream has an audio signal encoded thereinto, wherein the audio data stream comprises:

a syntax structure, which comprises information, which when processed by one or more processors, checks the audio data stream for trustworthiness based on a predetermined portion of the audio data stream, the predetermined portion being subjected to a hash function, or being used to derive data to be subjected to a hash function, for deriving a hash value to serve for checking the trustworthiness of the audio data stream,

a unique identifier, or a reference which points to a unique identifier, the unique identifier uniquely identifying a media asset comprising a plurality of media components to which the predetermined portion belongs;

an indication of a digital signature from the audio data stream, the digital signature being based on a combination of the predetermined portion, or the hash value, and the unique identifier.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (48)