Patents by Inventor Claude Lamblin
Claude Lamblin 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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Publication number: 20100228551Abstract: The invention relates to the encoding/decoding of digital signals, especially using transposition codes involving a calculation of combinatorial expressions. According to the invention, the combinatorial expressions are represented by prime factor power decompositions, and determined by a preliminary reading of pre-recorded representations of decompositions of selected whole numbers.Type: ApplicationFiled: February 13, 2007Publication date: September 9, 2010Applicant: FRANCE TELECOMInventors: Stephane Ragot, Claude Lamblin
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Patent number: 7792679Abstract: The invention relates to the compression coding of digital signals such as multimedia signals (audio or video), and more particularly a method for multiple coding, wherein several encoders each comprising a series of functional blocks receive an input signal in parallel. Accordingly, a method is provided in which, a) the functional blocks forming each encoder are identified, along with one or several functions carried out of each block, b) functions which are common to various encoders are itemized and c) said common functions are carried out definitively for a part of at least all of the encoders within at least one same calculation module.Type: GrantFiled: November 24, 2004Date of Patent: September 7, 2010Assignee: France TelecomInventors: David Virette, Claude Lamblin, Abdellatif Benjelloun Touimi
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Patent number: 7680670Abstract: The invention relates to compression coding and/or decoding of digital signals, in particular by vector variable-rate quantisation defining a variable resolution. For this purpose an impulsion dictionary comprises: for a given dimension, increasing resolution dictionaries imbricated into each other and, for a given dimension, a union of: a totality (D?i<N>) of code-vectors produced, by inserting elements taken in a final set (A) into smaller dimension code-vectors according to a final set of predetermined insertion rules (F1) and a second totality of code-vectors (Y?) which are not obtainable by insertion into the smaller dimension code vectors according to said set of the insertion rules.Type: GrantFiled: January 30, 2004Date of Patent: March 16, 2010Assignee: France TelecomInventors: Claude Lamblin, David Virette, Balazs Kovesi, Dominique Massaloux
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Method for adapting for an interoperability between short-term correlation models of digital signals
Publication number: 20090299737Abstract: The invention relates to the code conversion of digital signals, particularly voice signals, and in particular coding according to a second format from information obtained by carrying out a coding according to a first format. These first and second formats use LPC (linear predictive coding) short-term prediction models on digital signal sample blocks while using filters represented by respective LPC coefficients. The LPC coefficients of the second format are determined from an interpolation on the representative values of the LPC coefficients of at least the first format, between at least one given block and a preceding block. According to the invention, the interpolation (43), is dynamically effected while selecting (42), for each current block, at least one interpolation factor (?) among a preselection of factors according to a predetermined criterion such as a stationarity criterion of the digital signal (41).Type: ApplicationFiled: April 12, 2006Publication date: December 3, 2009Applicant: France TelecomInventors: Mohamed Ghenania, Claude Lamblin -
Publication number: 20090222273Abstract: The invention aims at constructing improved dictionaries of CELP excitation vectors for coding/decoding digital audio signals. Usually, each vector of dimension N comprises pulses capable of occupying N valid positions. The invention concerns the construction of dictionaries with particular structure by: providing a common sequence of pulses forming a base pattern; and assigning the base pattern to each excitation vector of the dictionary, based on one or more occurrences at one or more respective positions among said N valid positions. The invention also concerns a combination of dictionaries thus constructed with optionally standard multipulse dictionaries, by union or summation or cascading.Type: ApplicationFiled: February 13, 2007Publication date: September 3, 2009Applicant: France TelecomInventors: Dominique Massaloux, Romain Trilling, Claude Lamblin
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Publication number: 20090207933Abstract: The invention relates to the encoding/decoding of digital signals, especially using permutation codes involving a calculation of combinatorial expressions. According to the invention, the combinatorial expressions are represented by prime factor power decompositions, and determined by a preliminary reading of pre-recorded representations of decompositions of selected integers.Type: ApplicationFiled: February 5, 2009Publication date: August 20, 2009Applicant: France TelecomInventors: Stephane Ragot, Claude Lamblin
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Publication number: 20090207934Abstract: The invention relates to the encoding/decoding of digital signals, especially using permutation codes involving a calculation of combinatorial expressions. According to the invention, the combinatorial expressions are represented by prime factor power decompositions, and determined by a preliminary reading of pre-recorded representations of decompositions of selected integers.Type: ApplicationFiled: February 5, 2009Publication date: August 20, 2009Applicant: France TelecomInventors: Stephane Ragot, Claude Lamblin
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Patent number: 7574354Abstract: The invention relates to compressive transcoding between pulse coders using multipulse dictionaries in which each pulse occupies a position marked by an index. For each current pulse position supplied by a first coder, a neighborhood (Vge, Vde) is formed around that position. As a function of the pulse positions accepted by the second coder, pulse positions are selected in an ensemble constituted by a union of the neighborhoods. The second coder finally receives this selection (sj), involving a number of pulse positions smaller than the total number of pulse positions in the dictionary of the second coder.Type: GrantFiled: November 24, 2004Date of Patent: August 11, 2009Assignee: France TelecomInventors: Claude Lamblin, Mohamed Ghenania
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Publication number: 20080306732Abstract: Disclosed is a system and method for implementing compression coding of audio signals, such as speech signals, using two long-term prediction (LTP) models. The method determines the parameters of a second long-term prediction model on the basis of the parameters of at least one first LTP model. The present invention is aimed at switching from an LTP model with a single coefficient (monotap) to an LTP model with several coefficients, (multitap) and vice versa, as well as at switching between two multitap LTP models. The complexity of the method may be adjusted, especially as a function of a desired compromise between a target complexity and a desired quality. A device for implementing the method according to the invention is, moreover, very useful for multiple codings in cascade (transcodings) or in parallel (multi-codings and multi-mode codings).Type: ApplicationFiled: January 9, 2006Publication date: December 11, 2008Applicant: France TelecomInventors: Mohamed Ghenania, Claude Lamblin
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Publication number: 20070207778Abstract: The messaging system (10) comprises means (14) for storing digital audio and/or video messages and/or data. It further comprises means for truncating (26f, 44) messages coded by hierarchical encoders in order to record messages in said storage means and/or to forward messages previously recorded in said storage means.Type: ApplicationFiled: April 20, 2004Publication date: September 6, 2007Applicant: France TelecomInventors: Yannick Mahieux, David Deleam, Claude Lamblin
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Publication number: 20070162236Abstract: The invention relates to compression coding and/or decoding of digital signals, in particular by vector variable-rate quantisation defining a variable resolution. For this purpose an impulsion dictionary comprises: for a given dimension, increasing resolution dictionaries imbricated into each other and, for a given dimension, a union of: a totality (D?i<N>) of code-vectors produced, by inserting elements taken in a final set (A) into smaller dimension code-vectors according to a final set of predetermined insertion rules (F1) and a second totality of code-vectors (Y?) which are not obtainable by insertion into the smaller dimension code vectors according to said set of the insertion rules.Type: ApplicationFiled: January 30, 2004Publication date: July 12, 2007Applicant: France TelecomInventors: Claude Lamblin, David Virette, Balazs Kovesi, Dominique Massaloux
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Publication number: 20070150271Abstract: The invention relates to the compression coding of digital signals such as multimedia signals (audio or video), and more particularly a method for multiple coding, wherein several encoders each comprising a series of functional blocks receive an input signal in parallel. According to the invention, a) the functional blocks (BF10, BFnN) forming each encoder are identified, along with one or several functions carried out of each block, b) functions which are common to various encoders are itemized and c) said common functions are carried out definitively for a part of at least all of the encoders within at least one same calculation module. (BF1CC, BFnCC).Type: ApplicationFiled: November 24, 2004Publication date: June 28, 2007Applicant: France TelecomInventors: David Virette, Claude Lamblin, Abdellatif Benjelloun Touimi
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Publication number: 20070124138Abstract: The invention relates to compressive transcoding between pulse coders using multipulse dictionaries in which each pulse occupies a position marked by an index. For each current pulse position supplied by a first coder, a neighborhood (Vge, Vde) is formed around that position. As a function of the pulse positions accepted by the second coder, pulse positions are selected in an ensemble constituted by a union of the neighborhoods. The second coder finally receives this selection (sj), involving a number of pulse positions smaller than the total number of pulse positions in the dictionary of the second coder.Type: ApplicationFiled: November 24, 2004Publication date: May 31, 2007Applicant: France TelecomInventors: Claude Lamblin, Mohamed Ghenania
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Patent number: 6807526Abstract: At least one coded binary audio flux organized into frames is created from digital audio signals which were coded by transforming them from the time domain into the frequency domain. Transform coefficients of the signals in the frequency domain are quantized and coded according to a set of quantizers. The set is determined from a set of values extracted from the signals. The values make up selection parameters of the set of quantizers. The parameters are also present in the frames. A partial decoding state decodes then dequantizes transform coefficients produced by the coding based on a set of quantizers determined from the selection parameters contained in the frames of the coded binary audio flux or of each coded binary audio flux. The partially decoded frames are subjected to processing in the frequency domain. The thus-processed frames are then made available for use in a later utilization step.Type: GrantFiled: December 8, 2000Date of Patent: October 19, 2004Assignee: France Telecom S.A.Inventors: Abdellatif Benjelloun Touimi, Yannick Mahieux, Claude Lamblin
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Publication number: 20040098255Abstract: An improved EX-CELP or RCELP encoding scheme is proposed, in which, at the encoder side, a speech signal is perceptually weighted signal prior to entering a time scale modification module, then the modified signal is transformed into another domain, such as the speech or LP short-term residual domain, using the corresponding inverse filtering operation directly or possibly combined with another processing, for instance a short-term LP filtering. A shift function is calculated in the time scale modification process to associate the position of each sample in the modified signal with its original position before the modification. The positions of the samples in the modified signal that correspond to sub-frame boundaries of the original signal are evaluated to switch filters for the inverse filtering at the appropriate instants. Therefore, the synchronization between the inverse filters and the modified signal is maintained.Type: ApplicationFiled: November 14, 2002Publication date: May 20, 2004Applicants: France Telecom, Conexant Systems, Inc.Inventors: Balazs Kovesi, Dominique Massaloux, Claude Lamblin, Yang Gao
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Publication number: 20010027393Abstract: At least one coded binary audio flux organized into frames is created from digital audio signals which were coded by transforming them from the time domain into the frequency domain. Transform coefficients of the signals in the frequency domain are quantized and coded according to a set of quantizers. The set is determined from a set of values extracted from the signals. The values make up selection parameters of the set of quantizers. The parameters are also present in the frames. A partial decoding state decodes then dequantizes transform coefficients produced by the coding based on a set of quantizers determined from the selection parameters contained in the frames of the coded binary audio flux or of each coded binary audio flux. The partially decoded frames are subjected to processing in the frequency domain. The thus-processed frames are then made available for use in a later utilization step.Type: ApplicationFiled: December 8, 2000Publication date: October 4, 2001Inventors: Abdellatif Benjelloun Touimi, Yannick Mahieux, Claude Lamblin
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Patent number: 5717825Abstract: The method uses the technique of CELP coding with algebraic codebook. The search for the CELP excitation includes a calculation of certain components of the covariance matrix U=H.sup.T .multidot.H where H denotes a lower triangular Toeplitz matrix formed on the basis of the impulse response of a compound filter made up of synthesis filters and of a perceptual weighting filter. The memory-stored components of the covariance matrix are only those of the form U(pos.sub.i,p,pos.sub.i,p) and those of the form U(pos.sub.i,p, pos.sub.j,q), pos.sub.i,p and pos.sub.j,q respectively denoting position i and position j for the pulses p and q in the codes of the algebraic codebook.Type: GrantFiled: August 26, 1996Date of Patent: February 10, 1998Assignee: France TelecomInventor: Claude Lamblin