Patents by Inventor Friedhelm Wuppermann
Friedhelm Wuppermann 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).
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Patent number: 8484582Abstract: A method, device, and computer program product for locating a desired entry in a list containing multiple list entries for use with a limited text display is described. A list of entries is partitioned into a number of sub-parts such that the desired entry is contained in one of the list sub-parts. At least one of the sub-parts is characterized within a limited text display to prompt a user for feedback regarding the location of the desired entry in the sub-parts. The user feedback is received from a view input element. In response to the user feedback, the sub-part containing the desired entry is selected. The partitioning, characterizing, receiving, and selecting steps are re-performed one or more times until a final sub-part is generated that contains a limited number of entries including the desired entry.Type: GrantFiled: May 12, 2009Date of Patent: July 9, 2013Assignee: Nuance Communications, Inc.Inventors: Frank H. Broicher, Brigitte Giese, Ludwig Gruber, Stefan Ortmanns, Friedhelm Wuppermann
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Publication number: 20100017393Abstract: A method, device, and computer program product for locating a desired entry in a list containing multiple list entries for use with a limited text display is described. A list of entries is partitioned into a number of sub-parts such that the desired entry is contained in one of the list sub-parts. At least one of the sub-parts is characterized within a limited text display to prompt a user for feedback regarding the location of the desired entry in the sub-parts. The user feedback is received from a view input element. In response to the user feedback, the sub-part containing the desired entry is selected. The partitioning, characterizing, receiving, and selecting steps are re-performed one or more times until a final sub-part is generated that contains a limited number of entries including the desired entry.Type: ApplicationFiled: May 12, 2009Publication date: January 21, 2010Applicant: NUANCE COMMUNICATIONS, INC.Inventors: Frank H. Broicher, Brigitte Giese, Ludwig Gruber, Stefan Ortmanns, Friedhelm Wuppermann
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Patent number: 6725197Abstract: The invention relates to a method of automatic recognition of an at least partly spelled speech utterance, with a speech recognition unit (2) based on statistical models that include a linguistic speech model (6).Type: GrantFiled: October 12, 1999Date of Patent: April 20, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Friedhelm Wuppermann, Volker Stahl
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Patent number: 6608877Abstract: In a CELP coder a comparison between a target signal and a plurality of synthetic signals is made. The synthetic signal is derived by filtering a plurality of excitation sequences by a synthesis filter having parameters derived from the target signal. The excitation signal which results in a minimum error between the target signal and the synthetic signal is selected. The search for the best excitation signal requires a substantial computational complexity. To reduce the complexity a preselection of a small number of excitation sequences is made by selecting a small number of excitation sequences resembling the most a backward filtered target signal. With this small number of excitation sequences a full complexity search is made. Due to the reduced number of excitation sequences involved in the final selection the required computational complexity is reduced.Type: GrantFiled: November 13, 2000Date of Patent: August 19, 2003Assignee: Koninklijke Philips Electronics N.V.Inventors: Friedhelm Wuppermann, Fransiscus M. J. De Bont
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Patent number: 6603832Abstract: In a CELP coder a comparison between a target signal and a plurality of synthetic signals is made. The synthetic signal is derived by filtering a plurality of excitation sequences from a one dimensional codebook by a synthesis filter having parameters derived from the target signal. The excitation signal that results in a minimum error between the target signal and the synthetic signal is selected. In order to reduce the complexity of the search for the best excitation signal, the selection is done in two stages. First a preselection of a small number of excitation sequences is made by selecting only every L.sup.th codebook entry for preselecting a plurality of excitation sequences. Thereafter, with this small number of excitation sequences, a fill complexity search is made in which all excitation sequences surrounding the preselected ones are involved in the selection.Type: GrantFiled: January 16, 2001Date of Patent: August 5, 2003Assignee: Koninklijke Philips Electronics N.V.Inventors: Friedhelm Wuppermann, Fransiscus M. J. De Bont
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Patent number: 6600798Abstract: In a CELP coder, a comparison between a target signal and a plurality of synthetic signals is made. The synthetic signal is derived by filtering a plurality of excitation sequences by a synthesis filter having parameters derived from the target signal. The excitation signal which results in a minimum error between the target signal and synthetic signal is selected. The search for the best excitation signal requires a substantial computational complexity. To reduce the complexity, a preselection of a small number of excitation sequences is made using a reduced complexity synthesis filter. With this small number of excitation sequences, a full complexity search is made. Due to the reduced number of excitation sequences involved in the final selection, the required computational complexity is reduced.Type: GrantFiled: January 16, 2001Date of Patent: July 29, 2003Assignee: Koninklijke Philips Electronics N.V.Inventors: Friedhelm Wuppermann, Fransiscus M. J. De Bont
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Publication number: 20010014856Abstract: In a CELP coder a comparison between a target signal and a plurality of synthetic signals is made. The synthetic signal is derived by filtering a plurality of excitation sequences by a synthesis filter having parameters derived from the target signal. The excitation signal which results in a minimum error between the target signal and the synthetic signal is selected.Type: ApplicationFiled: January 16, 2001Publication date: August 16, 2001Applicant: U.S. PHILIPS CORPORATIONInventors: Friedhelm Wuppermann, Fransiscus M.J. De Bont
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Patent number: 6272196Abstract: In a CELP coder, a comparison between a target signal and a plurality of synthetic signals is made. A synthetic signal is derived by filtering a plurality of excitation sequences by a synthesis filter having parameters derived from the target signal. The excitation signal, which results in a minimum error between the target signal and the synthetic signal, is selected. The search for the best excitation signal requires a substantial computational complexity. To reduce the complexity, a preselection of a small number of excitation sequences is made by selecting a small number of excitation sequences resembling the most backward filtered target signal. With this small number of excitation sequences a full complexity search is made. Due to the reduced number of excitation sequences involved in the final selection the required computational complexity is reduced.Type: GrantFiled: February 12, 1997Date of Patent: August 7, 2001Assignee: U.S. Philips CorporaionInventors: Friedhelm Wuppermann, Fransiscus M. J. De Bont
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Publication number: 20010006537Type: ApplicationFiled: January 16, 2001Publication date: July 5, 2001Applicant: U.S. PHILIPS CORPORATIONInventors: Friedhelm Wuppermann, Fransiscus M.J. De Bont
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Patent number: 6014619Abstract: In a CELP coder a comparison between a target signal and a plurality of synthetic signals is made. The synthetic signal is derived by filtering a plurality of excitation sequences by a synthesis filter having parameters derived from the target signal. The excitation signal which results in a minimum error between the target signal and the synthetic signal is selected. In order to reduce the complexity of the search for the best excitation signal, thee selection is done in two stages. First a preselection of a small number of excitation sequences is made using a reduced complexity synthesis filter. Thereafter, with this small number of excitation sequences, a full complexity search is made. Due to the reduced number of excitation sequences involved in the final selection the required computational complexity is reduced.Type: GrantFiled: February 11, 1997Date of Patent: January 11, 2000Assignee: U.S. Philips CorporationInventors: Friedhelm Wuppermann, Eric Kathmann, Robert J. Sluijter, Fransiscus M. J. De Bont
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Patent number: 5982817Abstract: In a transmission system for transmitting speech and music signals, an input signal is coded in a coder (11) by a time domain coder (4). The output signal of the time domain coder (4) is decoded by a time domain decoder (8) and the signal thus decoded is subtracted from the input signal by a subtracter circuit (10). To improve the coding quality, the difference signal is coded by a frequency domain coder (12) and the output signal of the time domain coder (4) and the frequency domain coder (12) are combined in a multiplexer (14) and transmitted to a receiver.Type: GrantFiled: November 3, 1997Date of Patent: November 9, 1999Assignee: U.S. Philips CorporationInventor: Friedhelm Wuppermann
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Patent number: 5943646Abstract: In a transmission system a signal is encoded in an encoder (7) and the encoded signal is transmitted by a transmitter (2) via a transmission medium (4) to a receiver (6). In the encoder, analysis parameters of the input signal are determined by an analyzer (8) and quantized by a quantizer (14). The transmitter transmits quantization level numbers to the receiver (6), and in the receiver decoded analysis parameters are derived by interpolating level numbers of two subsequent sets of analysis parameters, and subsequently determining the corresponding analysis. By interpolating the level numbers instead of the analysis parameters themselves, a substantial amount of computational complexity is saved.Type: GrantFiled: March 13, 1997Date of Patent: August 24, 1999Assignee: U.S. Philips CorporationInventors: Friedhelm Wuppermann, Fransiscus M. J. De Bont
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Patent number: 5920832Abstract: In a CELP coder a comparison between a target signal and a plurality of synthetic signals is made. The synthetic signal is derived by filtering a plurality of excitation sequences from a one dimensional codebook by a synthesis filter having parameters derived from the target signal. The excitation signal which results in a minimum error between the target signal and the synthetic signal is selected. In order to reduce the complexity of the search for the best excitation signal, the selection is done in two stages. First a preselection of a small number of excitation sequences is made by selecting only every L.sup.th codebook entry for preselecting a plurality of excitation sequences. Thereafter, with this small number of excitation sequences, a full complexity search is made in which all excitation sequences surrounding the preselected ones are involved in the selection.Type: GrantFiled: February 12, 1997Date of Patent: July 6, 1999Assignee: U.S. Philips CorporationInventors: Friedhelm Wuppermann, Fransiscus M. J. De Bont
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Patent number: 5808569Abstract: A transmission system for encoded transmission of audio signals with frequency band compression. An input signal to be transmitted is divided into two spectral portions in a coder. One spectral portion is digitally encoded by a time-domain coder, and the other spectral portion is coded by a transform domain coder. The two digitally coded signals are then multiplexed for transmission as a composite digitally coded signal to a receiver. At the receiver the composite signal is demultiplexed and the two spectral portions thereof are respectively decoded by a time-domain decoder and a transformer-domain decoder. The decoded signals, covering the respective spectral portions, are then combined to reconstitute the originally transmitted audio signal.Type: GrantFiled: October 11, 1994Date of Patent: September 15, 1998Assignee: U.S. Philips CorporationInventors: Friedhelm Wuppermann, Franciscus M. J. De Bont
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Patent number: 5737367Abstract: An audio signal digital transmission system wherein the signal is sampled and successive segments each of N samples are digitally encoded. Encoding has heretofore been effected by vector quantization, whereby a memory stores a book of a large number of codewords corresponding to possible segments of successive signal samples, and the best matching stored segment is determined by calculation. The present invention bases encoding on comparison of the envelope of a signal segment with a limited number of reference envelopes. The best matching reference envelope is selected, and an identifying codeword therefore is transmitted along with related parameters. A receiver reproduces the signal from the reference envelope and the related parameters. Since identified envelopes of the signal segments are less variable and simpler to evaluate than the signal samples in the segments, a considerable reduction of memory capacity and calculation complexity is achieved.Type: GrantFiled: October 7, 1994Date of Patent: April 7, 1998Assignee: U.S. Philips CorporationInventors: Friedhelm Wuppermann, Franciscus M. J. De Bont