Apparatus and method for generating an encoded signal or for decoding an encoded audio signal using a multi overlap portion

US10354662B2 · kind B2 · utility

Assignee

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

Inventors

• Christian Helmrich · Erlangen, DE
• Jérémie Lecomte · Santa Clara, US
• Goran Markovic · Nuremberg, DE
• Markus Schnell · Nuremberg, DE
• Bernd Edler · Hannover, DE
• Stefan Reuschl · Nuremberg, DE

Key dates

• Filing date: Aug 19, 2015
• Grant date: Jul 16, 2019
• Expiry date: Dec 10, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/44
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An apparatus for generating an encoded signal includes: a window sequence controller for generating a window sequence information for windowing an audio or image signal, the window sequence information indicating a first window for generating a first frame of spectral values, a second window function and at least one third window function for generating a second frame of spectral values, wherein the first window function, the second window function and the one or more third window functions overlap within a multi-overlap region; a preprocessor for windowing a second block of samples corresponding to the second window function and the at least one third window functions using an auxiliary window function to acquire a second block of windowed samples, a spectrum converter for applying an aliasing-introducing transform; and a processor for processing the first frame and the second frame to acquire encoded frames of the audio or image signal.