Concept for switching of sampling rates at audio processing devices

US10783898B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Stefan Doehla · Erlangen, DE
• Guillaume Fuchs · Erlangen, DE
• Bernhard Grill · Lautenbächle, DE
• Markus Multrus · Nuremberg, DE
• Grzegorz Pietrzyk · Nuremberg, DE
• Emmanuel Ravelli · Erlangen, DE
• Markus Schnell · Nuremberg, DE

Key dates

• Filing date: Feb 10, 2017
• Grant date: Sep 22, 2020
• Expiry date: Feb 10, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L2019/0002
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

Audio decoder device for decoding a bitstream, the audio decoder device including: a predictive decoder for producing a decoded audio frame from the bitstream, wherein the predictive decoder includes a parameter decoder for producing one or more audio parameters for the decoded audio frame from the bitstream and wherein the predictive decoder includes a synthesis filter device for producing the decoded audio frame by synthesizing the one or more audio parameters for the decoded audio frame; a memory device including one or more memories, wherein each of the memories is configured to store a memory state for the decoded audio frame, wherein the memory state for the decoded audio frame of the one or more memories is used by the synthesis filter device for synthesizing the one or more audio parameters for the decoded audio frame; and a memory state resampling device configured to determine the memory state for synthesizing the one or more audio parameters for the decoded audio frame, which has a sampling rate, for one or more of the memories by resampling a preceding memory state for synthesizing one or more audio parameters for a preceding decoded audio frame, which has a preceding s…