Patent application number | Description | Published |
20080249765 | Audio Signal Decoding Using Complex-Valued Data - A decoder particularly, but not exclusively, for MPEG-1 layer III data signals, in which recovered spectral coefficients are transformed into time domain signal components, the time domain signal components then being transformed, using a forward transform which is orthogonally modulated with respect to the forward transform that was used at the encoder, to produce a set of second spectral coefficients. In this way, the first and second spectral coefficients may be used as complex-valued spectral coefficients which are amenable to post-processing. In the preferred embodiment, the complex-valued frequency components are, after post-processing, transformed to the time domain using an odd-frequency modulated Discrete Fourier Transform (DFT). | 10-09-2008 |
20080255856 | Audio Encoding and Decoding - An audio encoder ( | 10-16-2008 |
20080260048 | Transcoder and Method of Transcoding Therefore - A transcoder comprises a receiver ( | 10-23-2008 |
20090043591 | AUDIO ENCODING AND DECODING - An audio encoder comprises a multi-channel receiver ( | 02-12-2009 |
20090063140 | ENCODING AND DECODING OF AUDIO SIGNALS USING COMPLEX-VALUED FILTER BANKS - An encoder ( | 03-05-2009 |
20090083040 | ENCODING AND DECODING A SET OF SIGNALS - An encoding device ( | 03-26-2009 |
20090192804 | METHOD AND APPARATUS FOR TIME SCALING OF A SIGNAL - A decoder receives ( | 07-30-2009 |
20090252338 | SWEET SPOT MANIPULATION FOR A MULTI-CHANNEL SIGNAL - An apparatus, such as a decoder is arranged to modify the sweet-spot of a spatial M-channel audio signal by modifying spatial parameters. Specifically, a receiver ( | 10-08-2009 |
20100023335 | LOW COMPLEXITY PARAMETRIC STEREO DECODER - A stereo audio decoder with low complexity is provided. A high stereo sound quality can be obtained with a limited computational power and is thus suitable for miniature and mobile equipment. The stereo decoder generates a set of stereo output channels (C | 01-28-2010 |
20110058679 | Method, Device, Encoder Apparatus, Decoder Apparatus and Audio System - A method and a device are described for processing a stereo signal obtained from an encoder, which encodes an N-channel audio signal into spatial parameters (P) and a stereo down-mix comprising first and second stereo signals (L | 03-10-2011 |
20110091045 | Audio Encoding and Decoding - An audio encoder ( | 04-21-2011 |
20110096932 | PARAMETRIC STEREO UPMIX APPARATUS, A PARAMETRIC STEREO DECODER, A PARAMETRIC STEREO DOWNMIX APPARATUS, A PARAMETRIC STEREO ENCODER - A parametric stereo upmix apparatus ( | 04-28-2011 |
20110178810 | AUDIO SIGNAL ENCODING OR DECODING - Encoding an audio signal is provided wherein the audio signal includes a first audio channel and a second audio channel, the encoding comprising subband filtering each of the first audio channel and the second audio channel in a complex modulated filterbank to provide a first plurality of subband signals for the first audio channel and a second plurality of subband signals for the second audio channel, downsampling each of the subband signals to provide a first plurality of downsampled subband signals and a second plurality of downsampled subband signals, further subband filtering at least one of the downsampled subband signals in a further filterbank in order to provide a plurality of sub-subband signals, deriving spatial parameters from the sub-subband signals and from those downsampled subband signals that are not further subband filtered, and deriving a single channel audio signal comprising derived subband signals derived from the first plurality of downsampled subband signals and the second plurality of downsampled subband signals. Further, decoding is provided wherein an encoded audio signal comprising an encoded single channel audio signal and a set of spatial parameters is decoded by decoding the encoded single channel audio channel to obtain a plurality of downsampled subband signals, further subband filtering at least one of the downsampled subband signals in a further filterbank in order to provide a plurality of sub-subband signals, and deriving two audio channels from the spatial parameters, the sub-subband signals and those downsampled subband signals that are not further subband filtered. | 07-21-2011 |
20110249758 | GENERATING AN OUTPUT SIGNAL BY SEND EFFECT PROCESSING - An output signal is generated from an input signal by applying a send effect processing to the input signal. The input signal comprises a weighted sum of component signals. Dependencies between the weighted component signals are represented by parameters. In accordance with the present invention, the output signal is generated in dependence of the parameters to compensate for an unequal weighting of component signals comprised in the input signal. Due to this compensation the strength of the send effect corresponding to the separate component signals is (nearly) proportional to the strength of each of the component signals, which results in more realistic surround experience. | 10-13-2011 |
20110293129 | HEAD TRACKING - A head tracking system ( | 12-01-2011 |
20110311063 | EMBEDDING AND EXTRACTING ANCILLARY DATA - The invention proposes a method for embedding an ancillary data into a compressed audio signal. This is achieved by replacing Least Significant Bits (LSBs) in at least one frequency subband of the compressed audio signal by the ancillary data. When replacing LSB bits of compressed subband signals with the ancillary data, the subband signal is effectively modified, resulting in a different decoded output. The replaced LSB bits corresponding to the ancillary data are conveyed as part of the bitstream and can be easily extracted at the decoder. In such a way the decoder obtains the ancillary data that can be used for more advanced audio reproduction at the decoder. The compressed audio itself maintains a good audio quality despite the replacement of the LSB bits of the frequency subband, because the LSB bits do not contribute to the audible artefacts. | 12-22-2011 |
20120063604 | SCALABLE MULTI-CHANNEL AUDIO CODING - An audio encoder adapted to encode a multi-channel audio signal. The encoder comprises an encoder combination module (ECM) for generating a dominant signal part and a residual signal part being a combined representation of first and second audio signals, the dominant and residual signal parts being obtained by applying a mathematical procedure to the first and second audio signals. The mathematical procedure involves a spatial parameter comprising a description of spatial properties of the first and second audio signals. Embodiments include a plurality of interconnected encoder combination module, so that e.g. six independent 5.1 format audio signals can be encoded to a single or two dominant signal parts and a number of parameter sets and residual signal parts. | 03-15-2012 |
20120224702 | PARAMETRIC ENCODING AND DECODING - An encoder for a multi-channel audio signal which comprises a down-mixer ( | 09-06-2012 |
20140321652 | PARAMETRIC STEREO UPMIX APPARATUS, A PARAMETRIC STEREO DECODER, A PARAMETRIC STEREO DOWNMIX APPARATUS, A PARAMETRIC STEREO ENCODER - A parametric stereo upmix method for generating a left signal and a right signal from a mono downmix signal based on spatial parameters includes predicting a difference signal comprising a difference between the left signal and the right signal based on the mono downmix signal scaled with a prediction coefficient. The prediction coefficient is derived from the spatial parameters. The method further includes deriving the left signal and the right signal based on a sum and a difference of the mono downmix signal and said difference signal. | 10-30-2014 |
20140358567 | SPATIAL AUDIO RENDERING AND ENCODING - An encoder ( | 12-04-2014 |