Method and apparatus for obtaining spectrum coefficients for a replacement frame of an audio signal, audio decoder, audio receiver, and system for transmitting audio signals

US9916834B2 · kind B2 · utility

Assignee

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

Inventors

• Janine Sukowski · Erlangen, DE
• Ralph Sperschneider · Erlangen, DE
• Goran Markovic · Nuremberg, DE
• Wolfgang Jaegers · Erlangen, DE
• Christian Helmrich · Erlangen, DE
• Bernd Edler · Hannover, DE
• Ralf Geiger · Erlangen, DE

Key dates

• Filing date: Dec 21, 2015
• Grant date: Mar 13, 2018
• Expiry date: Mar 22, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L19/0212
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An approach is described that obtains spectrum coefficients for a replacement frame of an audio signal. A tonal component of a spectrum of an audio signal is detected based on a peak that exists in the spectra of frames preceding a replacement frame. For the tonal component of the spectrum a spectrum coefficients for the peak and its surrounding in the spectrum of the replacement frame is predicted, and for the non-tonal component of the spectrum a non-predicted spectrum coefficient for the replacement frame or a corresponding spectrum coefficient of a frame preceding the replacement frame is used.