Patents by Inventor Dinei Afonso Ferreira Florencio
Dinei Afonso Ferreira Florencio 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: 7203371Abstract: Systems and methods for performing adaptive filtering are disclosed. The present invention generates probabilities that can be used in an encoder, such as an arithmetic encoder and generates those probabilities in a computationally efficient manner. Probabilities of previously encoded coefficients are employed, effectively, in generating probabilities of the coefficients without regard to directional information. Thus, a large amount of information is adaptively and efficiently used in generating the probabilities. For the coefficients, the probability is computed based at least partly on at least one probability of a previously computed probability of a neighboring coefficient. Then, the coefficients are encoded using those computed probabilities.Type: GrantFiled: November 28, 2005Date of Patent: April 10, 2007Assignee: Microsoft CorporationInventors: Patrice Y. Simard, Henrique S. Malvar, Dinei Afonso Ferreira Florencio, David Willard Steinkraus
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Patent number: 7197146Abstract: A system and method facilitating signal enhancement utilizing an adaptive filter is provided. The invention includes an adaptive filter that filters an input based upon a plurality of adaptive coefficients and modifies the adaptive coefficients based on a feedback output. A feedback component provides the feedback output based, at least in part, upon a non-linear function of the acoustic reverberation reduced output. Optionally, the system can further include a linear prediction (LP) analyzer and/or a LP synthesis filter. The system can enhance signal(s), for example, to improve the quality of speech that is acquired by a microphone by reducing reverberation. The system utilizes, at least in part, the principle that certain characteristics of reverberated speech are measurably different from corresponding characteristics of clean speech. The system can employ a filter technology (e.g., reverberation reducing) based on a non-linear function, for example, the kurtosis metric.Type: GrantFiled: May 16, 2006Date of Patent: March 27, 2007Assignee: Microsoft CorporationInventors: Henrique S. Malvar, Dinei Afonso Ferreira Florencio, Bradford W. Gillespie
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Patent number: 7167568Abstract: A system and method facilitating signal enhancement utilizing an adaptive filter is provided. The invention includes an adaptive filter that filters an input based upon a plurality of adaptive coefficients and modifies the adaptive coefficients based on a feedback output. A feedback component provides the feedback output based, at least in part, upon a non-linear function of the acoustic reverberation reduced output. Optionally, the system can further include a linear prediction (LP) analyzer and/or a LP synthesis filter. The system can enhance signal(s), for example, to improve the quality of speech that is acquired by a microphone by reducing reverberation. The system utilizes, at least in part, the principle that certain characteristics of reverberated speech are measurably different from corresponding characteristics of clean speech. The system can employ a filter technology (e.g. reverberation reducing) based on a non-linear function, for example, the kurtosis metric.Type: GrantFiled: May 2, 2002Date of Patent: January 23, 2007Assignee: Microsoft CorporationInventors: Henrique S. Malvar, Dinei Afonso Ferreira Florencio, Bradford W. Gillespie
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Patent number: 6999628Abstract: Systems and methods for performing adaptive filtering are disclosed. The present invention generates probabilities that can be used in an encoder, such as an arithmetic encoder and generates those probabilities in a computationally efficient manner. Probabilities of previously encoded coefficients are employed, effectively, in generating probabilities of the coefficients without regard to directional information. Thus, a large amount of information is adaptively and efficiently used in generating the probabilities. For the coefficients, the probability is computed based at least partly on at least one probability of a previously computed probability of a neighboring coefficient. Then, the coefficients are encoded using those computed probabilities.Type: GrantFiled: March 28, 2002Date of Patent: February 14, 2006Assignee: Microsoft CorporationInventors: Patrice Y. Simard, Henrique S. Malvar, Dinei Afonso Ferreira Florencio, David Willard Steinkraus
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Patent number: 6792149Abstract: A method and apparatus for reducing information artifacts imparted to a decoded video information stream by an MPEG-like decoder utilizing discrete transform (DCT) domain compression to produce a size-reduced reference image information frame. Specifically, the invention responsively selects one of a plurality of pre-defined DCT coefficient matrices in response to the amount of compression to be imparted to the reference image information frame, and the presence or absence of field-mode encoding the reference image information frame.Type: GrantFiled: September 25, 1998Date of Patent: September 14, 2004Assignee: Sarnoff CorporationInventor: Dinei Afonso Ferreira Florencio
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Patent number: 6704358Abstract: A method and apparatus for adapting scaled pixel blocks such that the resolution, or grid size, of associated motion vector information is substantially the same. Also disclosed are various techniques for producing and processing the scaled pixel blocks such that memory resources and/or processing resources are efficiently utilized.Type: GrantFiled: January 20, 1999Date of Patent: March 9, 2004Assignees: Sarnoff Corporation, Motorola, Inc.Inventors: Shipeng Li, Keren Hu, Dinei Afonso Ferreira Florencio
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Publication number: 20030206640Abstract: A system and method facilitating signal enhancement utilizing an adaptive filter is provided. The invention includes an adaptive filter that filters an input based upon a plurality of adaptive coefficients, the adaptive filter modifying at least one of the adaptive coefficients based on a feedback output. The invention further includes a feedback component that provides the feedback output based, at least in part, upon a non-linear function of the acoustic reverberation reduced output.Type: ApplicationFiled: May 2, 2002Publication date: November 6, 2003Inventors: Henrique S. Malvar, Dinei Afonso Ferreira Florencio, Bradford W. Gillespie
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Publication number: 20030190080Abstract: Systems and methods for performing adaptive filtering are disclosed. The present invention generates probabilities that can be used in an encoder, such as an arithmetic encoder and generates those probabilities in a computationally efficient manner. Probabilities of previously encoded coefficients are employed, effectively, in generating probabilities of the coefficients without regard to directional information. Thus, a large amount of information is adaptively and efficiently used in generating the probabilities. For the coefficients, the probability is computed based at least partly on at least one probability of a previously computed probability of a neighboring coefficient. Then, the coefficients are encoded using those computed probabilities.Type: ApplicationFiled: March 28, 2002Publication date: October 9, 2003Inventors: Patrice Y. Simard, Henrique S. Malvar, Dinei Afonso Ferreira Florencio, David Willard Steinkraus
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Patent number: 6621866Abstract: A transcoding method for inserting a visual element into an encoded bit stream with minimal decoding of the encoded bit stream. The transcoding method includes the steps of receiving an encoded bit stream containing a picture, partially decoding a copy of the bit stream, determining if a segment of the picture in the bit stream is affected by the insertion of the visual element, re-encoding the segment if the segment is affected by the insertion of the visual element, and outputting the re-encoded bit stream. The encoded and re-encoded bit streams may be MPEG-encoded bit streams. The re-encoded bit stream may be output using a bit rate control process that randomly selects an initial processing point within the re-encoded bit stream, requantizes the re-encoded bit stream using a modified quantization table, and/or utilizes a slice-level stopping criteria for selectively starting or ending bit rate control.Type: GrantFiled: January 28, 2000Date of Patent: September 16, 2003Assignee: Thomson Licensing S.A.Inventors: Dinei Afonso Ferreira Florencio, Stuart Jay Golin, Jungwoo Lee
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Patent number: 6549577Abstract: The invention comprises a method an apparatus for allocating processing resources in an information stream decoder in response to format indicia included within a compressed information stream. Specifically, the invention comprises an apparatus and method for decoding a video stream having an associated source video format to produce a decoded video stream having the same format or a different format, in which a computational resource is allocated in response to a change in format between the associated video format and the resultant video format.Type: GrantFiled: September 25, 1998Date of Patent: April 15, 2003Assignee: Sarnoff CorporationInventors: Dinei Afonso Ferreira Florencio, Smith Freeman, Glenn Arthur Reitmeier
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Publication number: 20020176506Abstract: The invention comprises a method an apparatus for allocating processing resources in an information stream decoder in response to format indicia included within a compressed information stream. Specifically, the invention comprises an apparatus and method for decoding a video stream having an associated source video format to produce a decoded video stream having the same format or a different format, in which a computational resource is allocated in response to a change in format between the associated video format and the resultant video format.Type: ApplicationFiled: September 25, 1998Publication date: November 28, 2002Inventors: DINEI AFONSO FERREIRA FLORENCIO, SMITH FREEMAN, GLENN ARTHUR REITMEIER
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Patent number: 6373894Abstract: An apparatus and a concomitant method is disclosed for recovering or adjusting quantized coefficients by using a nonlinear method. The method operates by fitting the received signal into one of several predefined classes, and adjusting the signal as appropriate to better fit the best suited class.Type: GrantFiled: February 17, 1998Date of Patent: April 16, 2002Assignees: Sarnoff Corporation, Sharp Kabushiki KaishaInventors: Dinei Afonso Ferreira Florencio, Iraj Sodagar
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Patent number: 6310919Abstract: A method and apparatus for reducing memory and memory bandwidth requirements in an MPEG-like decoder by compressing image information prior to storage such that a reduced resolution image information frame is stored and subsequently utilized by, e.g., a motion compensation module of the decoder. The invention responsively processes motion vector information in a manner consistent with the amount of compression imparted to a predicted image information frame, and the type of prediction employed in forming the predicted information frame.Type: GrantFiled: September 25, 1998Date of Patent: October 30, 2001Assignee: Sarnoff CorporationInventor: Dinei Afonso Ferreira Florencio
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Patent number: 6226041Abstract: When adding logos or other imagery to compressed digital video bitstreams, logos are inserted into only disposable frames. Since disposable frames are never used as references for decoding other frames, the logos can be added without adversely affecting the playback of any other frames. Preferably, the compressed data for disposable-frame macroblocks corresponding to the desired location for logo insertion are extracted from the compressed bitstream and replaced by intra-encoded logo-inserted data. As a result, logos can be inserted into compressed digital video bitstreams without having to completely decode and re-encode the bitstreams, while maintaining the overall quality of the video display.Type: GrantFiled: July 28, 1998Date of Patent: May 1, 2001Assignee: Sarnoff CorporationInventors: Dinei Afonso Ferreira Florencio, Ragnar Hlynur Jonsson
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Patent number: 6125147Abstract: A method and apparatus for reducing breathing artifacts in MPEG-like video information streams employing group of pictures (GOP) or group of frames (GOF) structures.Type: GrantFiled: July 31, 1998Date of Patent: September 26, 2000Assignee: Motorola, Inc.Inventors: Dinei Afonso Ferreira Florencio, Shipeng Li