Patents by Inventor Ralf Geiger

Ralf Geiger has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20080097764
    Abstract: An embodiment of an analysis filterbank for filtering a plurality of time domain input frames, wherein an input frame comprises a number of ordered input samples, comprises a windower configured to generating a plurality of windowed frames, wherein a windowed frame comprises a plurality of windowed samples, wherein the windower is configured to process the plurality of input frames in an overlapping manner using a sample advance value, wherein the sample advance value is less than the number of ordered input samples of an input frame divided by two, and a time/frequency converter configured to providing an output frame comprising a number of output values, wherein an output frame is a spectral representation of a windowed frame.
    Type: Application
    Filed: May 4, 2007
    Publication date: April 24, 2008
    Inventors: Bernhard GRILL, Markus Schnell, Ralf Geiger, Gerald Schuller
  • Patent number: 7343287
    Abstract: An apparatus for scalable encoding a spectrum of a signal including audio and/or video information, with the spectrum comprising binary spectral values, includes a means for generating a first sub-scaling layer and a second sub-scaling layer in addition to a means for forming the encoded signal, with the means for forming being implemented so as to include the first sub-scaling layer and the second sub-scaling layer into the encoded signal that the first and the second sub-scaling layer are separately decodable from each other. In contrast to a full-scaling layer, a sub-scaling layer includes only the bits of a certain order of a part of the binary spectral values in the band, so that, by additionally decoding a sub-scaling layer, a more finely controllable and a more finely scalable precision gain may be achieved.
    Type: Grant
    Filed: August 7, 2003
    Date of Patent: March 11, 2008
    Assignee: Fraunhofer-Gesellschaft Zur Forderung der Angewandten Forschung E.V.
    Inventors: Ralf Geiger, Thomas Sporer, Karlheinz Brandenburg, Juergen Herre, Juergen Koller, Gerald Schuller
  • Patent number: 7275036
    Abstract: A time-discrete audio signal is processed to provide a quantization block with quantized spectral values. Furthermore, an integer spectral representation is generated from the time-discrete audio signal using an integer transform algorithm. The quantization block having been generated using a psychoacoustic model is inversely quantized and rounded to then form a difference between the integer spectral values and the inversely quantized rounded spectral values. The quantization block alone provides a lossy psychoacoustically coded/decoded audio signal after the decoding, whereas the quantization block, together with the combination block, provides a lossless or almost lossless coded and again decoded audio signal in the decoding. By generating the differential signal in the frequency domain, a simpler coder/decoder structure results.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: September 25, 2007
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Ralf Geiger, Thomas Sporer, Karlheinz Brandenburg, Juergen Herre, Juergen Koller, Joachim Deguara
  • Publication number: 20070196022
    Abstract: For the reduction of the rounding error, a first and a second non-integer input value are provided and combined, for example by addition, in non-integer state to obtain a non-integer result value which is rounded and added to a third input value. Thus, the rounding error may be reduced at an interface between two rotations divided into lifting steps or between a first rotation divided into lifting steps and a first lifting step of a subsequent multi-dimensional lifting sequence.
    Type: Application
    Filed: March 20, 2006
    Publication date: August 23, 2007
    Inventors: Ralf Geiger, Gerald Schuller, Thomas Sporer
  • Publication number: 20070013474
    Abstract: A method for adjusting a sheet resistor, in particular in an expansion measuring element, is described, the sheet resistor having a low-resistance supply lead area and a high-resistance resistor area, which is electrically connected to the supply lead area, the method having the following steps: performing a first laser cutting step in the resistor area to modify the temperature coefficient of the offset voltage; performing a second laser cutting step to adjust the sheet resistor, so that an electric quantity of the sheet resistor and thereby the offset voltage is set as a function of a predefined setpoint value.
    Type: Application
    Filed: June 27, 2006
    Publication date: January 18, 2007
    Inventors: Philip Cutuli, Axel Jasenek, Ralf Geiger
  • Publication number: 20060210180
    Abstract: When processing a signal having a sequence of discrete values, wherein there is a first frequency range, in which the signal has a high energy, and wherein there is a second frequency range, in which the signal has a low energy, the sequence of discrete values is first manipulated to obtain a sequence of manipulated values, so that at least one of the manipulated values is non-integer. Then the sequence of manipulated values is rounded to obtain a sequence of manipulated values. The rounding is formed to effect a spectral shaping of a generated rounding error so that a spectrally shaped rounding error has a higher energy in the first frequency range than in the second frequency range. By spectrally shaping the rounding error so that the rounding error does not have any energy either in the storage areas where there is no signal energy, an especially efficient coding is obtained particularly in connection with a lossless coding context.
    Type: Application
    Filed: March 23, 2006
    Publication date: September 21, 2006
    Inventors: Ralf Geiger, Gerald Schuller, Thomas Sporer
  • Publication number: 20060115171
    Abstract: For converting first and second blocks of discrete values into a transformed representation, the first block is transformed according to a first transformation rule and then rounded. Then, the rounded transformed values are summed with the second block of original discrete values, to then process the summation result according to a second transformation rule. The output values of the transformation via the second transformation rule are again rounded and then subtracted from the original discrete values of the first block of discrete values to obtain a block of integer output values of the transformed representation. By this multi-dimensional lifting scheme, a lossless integer transformation is obtained, which can be reversed by applying the same transformation rule, but with different signs in summation and subtraction, respectively, so that an inverse integer transformation can also be obtained.
    Type: Application
    Filed: January 13, 2006
    Publication date: June 1, 2006
    Inventors: Ralf Geiger, Gerald Schuller, Thomas Sporer
  • Publication number: 20060095253
    Abstract: For embedding binary payload in a carrier signal, which, for example, is an audio signal, a sequence of time-discrete values of the carrier signal is converted to the frequency domain by means of an integer transform algorithm to obtain binary spectral representation values. Bits of the binary spectral representation values with a valency less than signal limit valency are determined and set according to the payload. The signal limit valency for a spectral representation value is less than the valency of the leading bit of this spectral representation value, so that, with adequate distance, a psychoacoustic transparent insertion of information is achieved. Thus a modified spectral representation with inserted information is generated which is finally converted back to the time domain using an integer back transform algorithm. For extracting the payload, the time-discrete signal with the inserted information is again converted to a spectral representation with the integer forward transform algorithm.
    Type: Application
    Filed: November 15, 2005
    Publication date: May 4, 2006
    Inventors: Gerald Schuller, Ralf Geiger, Juergen Koller
  • Publication number: 20050114126
    Abstract: A time-discrete audio signal is processed to provide a quantization block with quantized spectral values. Furthermore, an integer spectral representation is generated from the time-discrete audio signal using an integer transform algorithm. The quantization block having been generated using a psychoacoustic model is inversely quantized and rounded to then form a difference between the integer spectral values and the inversely quantized rounded spectral values. The quantization block alone provides a lossy psychoacoustically coded/decoded audio signal after the decoding, whereas the quantization block, together with the combination block, provides a lossless or almost lossless coded and again decoded audio signal in the decoding. By generating the differential signal in the frequency domain, a simpler coder/decoder structure results.
    Type: Application
    Filed: October 15, 2004
    Publication date: May 26, 2005
    Inventors: Ralf Geiger, Thomas Sporer, Karlheinz Brandenburg, Juergen Herre, Juergen Koller, Joachim Deguara
  • Publication number: 20040220805
    Abstract: In order to obtain an integer transform, which provides integer output values, the TDAC function of a MDCT is explicitly carried out in the time domain before the forward transform. In overlapping windows, this results in a Givens rotation which may be represented by lifting matrices, wherein time-discrete sampled values of an audio signal may at first be summed up on a pair-wise basis to build a vector so as to be sequentially provided with a lifting matrix. In accordance with the invention, after each multiplication of a vector by a lifting matrix, a rounding step is carried out such that, on the output-side, only integers will result. By transforming the windowed integer sampled value with an integer transform, a spectral representation with integer spectral values may be obtained. The inverse mapping with an inverse rotation matrix and corresponding inverse lifting matrices results in an exact reconstruction.
    Type: Application
    Filed: June 25, 2004
    Publication date: November 4, 2004
    Inventors: Ralf Geiger, Thomas Sporer, Jurgen Koller, Karlheinz Brandenburg, Jurgen Herre
  • Publication number: 20040184537
    Abstract: An apparatus for scalable encoding a spectrum of a signal including audio and/or video information, with the spectrum comprising binary spectral values, includes a means (102) for generating a first sub-scaling layer and a second sub-scaling layer in addition to a means (106) for forming the encoded signal, with the means (106) for forming being implemented so as to include the first sub-scaling layer and the second sub-scaling layer into the encoded signal that the first and the second sub-scaling layer are separately decodable from each other. In contrast to a full-scaling layer, a sub-scaling layer includes only the bits of a certain order of a part of the binary spectral values in the band, so that, by additionally decoding a sub-scaling layer, a more finely controllable and a more finely scalable precision gain may be achieved.
    Type: Application
    Filed: August 7, 2003
    Publication date: September 23, 2004
    Inventors: Ralf Geiger, Thomas Sporer, Karlheinz Brandenburg, Juergen Herre, Juergen Koller, Gerald Schuller