Audio encoder/decoder with switching between first and second encoders/decoders using first and second framing rules

US8892449B2 · kind B2 · utility

Assignees

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

Inventors

• Jérémie Lecomte · Santa Clara, US
• Philippe Gournay · Sherbrooke, CA
• Stefan Bayer · Nuremberg, DE
• Markus Multrus · Nuremberg, DE
• Bruno Bessette · Sherbrooke, CA
• Bernhard Grill · Lautenbächle, DE

Key dates

• Filing date: Jan 11, 2011
• Grant date: Nov 18, 2014
• Expiry date: Aug 27, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L19/022
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An audio encoder for encoding audio samples has a first time domain aliasing introducing encoder configured to decode audio samples in a first encoding domain and having a first framing rule, a start window and a stop window. The audio encoder further has a second encoder configured to encode samples in a second encoding domain and having a predetermined frame size number of audio samples, and a coding warm-up period number of audio samples, the second encoder having a different second framing rule, a frame of the second encoder being an encoded representation of a number of successive audio samples that is equal to the predetermined frame size number of audio samples. The audio encoder further has a controller switching from the first to the second encoder and for modifying the second framing rule or for modifying the start or the stop window of the first encoder.