Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Technische Universitaet Ilemnau

Technische Universitat Ilmenau

Manfred Lutzky

Markus Schnell

Bernhard Grill

Marc Gayer

Ralf Geiger

Gerald Schuller

Markus Multrus

Markus Lohwasser

Conrad Benndorf

Adrian Tomasek

Bernd Edler

Markus Schmidt

Michael Mellar

Konstantin Schmidt

Tobias Albert

Eleni Fotopoulou

Timon Seidl

Ralph Sperschneider

Alexander Tschekalinskij

Michael Schuldt

Emmanuel Ravelli

Manuel Jander

Johannes Hilpert

Stefan Geyersberger

Harald Popp

Stefan Wabnik

Ulrich Kraemer

Jens Hirschfeld

Bodo Teichmann

Sascha Disch

Martin Dietz

Harald Fuchs

Josef Bernhard

Thomas Sporer

Stefan Kraegeloh

Sandra Brix

Jan Büthe

Jan Buethe

Maximilian Schlegel

Michael Werner

Guillaume Fuchs

Stefan Doehla

Goran Markovic

Michael Schnabel

Wolfgang Jaegers

Stefan Döhla

Srikanth Korse

Juergen Hupp

Maria Luis Valero

Martin Tittel

Stefan Krägeloh

Marco Diatschuk

Johann Hilpert

Martin Weishart

Maria L Valero

Michael Haertl

Harald Gernhardt

Reinfried Bartholomaeus

Ulrich Krämer

The transient problem may be sufficiently addressed, and for this purpose, a further delay on the side of the decoding may be reduced if a new SBR frame class is used wherein the frame boundaries are not shifted, i.e. the grid boundaries are still synchronized with the frame boundaries, but wherein a transient position indication is additionally used as a syntax element so as to be used, on the encoder and/or decoder sides, within the frames of these new frame class for determining the grid boundaries within these frames.

Encoding an information signal

A downscaled version of an audio decoding procedure may more effectively and/or at improved compliance maintenance be achieved if the synthesis window used for downscaled audio decoding is a downsampled version of a reference synthesis window involved in the non-downscaled audio decoding procedure by downsampling by the downsampling factor by which the downsampled sampling rate and the original sampling rate deviate, and downsampled using a segmental interpolation in segments of ¼ of the frame length.

Downscaled decoding

A downscaled version of an audio decoding procedure may more effectively and/or at improved compliance maintenance be achieved if the synthesis window used for downscaled audio decoding is a downsampled version of a reference synthesis window involved in the non-downscaled audio decoding procedure by downsampling by the downsampling factor by which the downsampled sampling rate and the original sampling rate deviate, and downsampled using a segmental interpolation in segments of 1/4 of the frame length.

An embodiment of an apparatus for generating audio subband values in audio subband channels includes an analysis windower for windowing a frame of time-domain audio input samples being in a time sequence extending from an early sample to a later sample using an analysis window function including a sequence of window coefficients to obtain windowed samples. The analysis window function includes a first number of window coefficients derived from a larger window function including a sequence of a larger second number of window coefficients, wherein the window coefficients of the window function are derived by an interpolation of window coefficients of the larger window function. The apparatus further includes a calculator for calculating the audio subband values using the windowed samples.

Apparatus and method for generating audio subband values and apparatus and method for generating time-domain audio samples

An audio transmitter processor for generating an error protected frame using encoded audio data of an audio frame, the encoded audio data for the audio frame having a first amount of information units and a second amount of information units, has: a frame builder for building a codeword frame having a codeword raster, wherein the frame builder is configured to determine a border between a first amount of information units and a second amount of information units so that a starting information unit of the second amount of information units coincides with a codeword border; and an error protection coder to obtain a plurality of processed codewords representing the error protected frame.

Audio transmitter processor, audio receiver processor and related methods and computer programs for processing an error protected frame

A channel encoder for encoding a frame includes a multi-mode redundancy encoder for redundancy encoding the frame in accordance with a certain coding mode from a set of different coding modes, wherein the coding modes are different from each other with respect to an amount of redundancy added to the frame, wherein the multi-mode redundancy encoder is configured to output a coded frame including at least one code word; and a colorator for applying a coloration sequence to the at least one code word; wherein the coloration sequence is such that at least one bit of the code word is changed by the application of the at least one of coloration sequence, wherein the specific coloration sequence is selected in accordance with the certain coding mode.

Multi-mode channel coding

There are provided methods and apparatus for performing modified cosine transformation (MDCT) with an analysis/synthesis windowing function, using an analysis windowing function having a meandering portion which passes a linear function in correspondence of at least four points.

Analysis/synthesis windowing function for modulated lapped transformation

Growing community of inventors

Nuremberg, Germany

Manfred Lutzky