Patents by Inventor Haricharan LAKSHMAN
Haricharan LAKSHMAN 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: 10600233Abstract: A target view to a 3D scene depicted by a multiview image is determined. The multiview image comprising sampled views at sampled view positions distributed throughout a viewing volume. Each sampled view in the sampled views comprises a wide-field-of-view (WFOV) image and a WFOV depth map as seen from a respective sampled view position in the sampled view positions. The target view is used to select, from the sampled views, a set of sampled views. A display image is caused to be rendered on a display of a wearable device. The display image is generated based on a WFOV image and a WFOV depth map for each sampled view in the set of sampled views.Type: GrantFiled: September 23, 2019Date of Patent: March 24, 2020Assignee: Dolby Laboratories Licensing CorporationInventors: Haricharan Lakshman, Ajit Ninan
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Patent number: 10574982Abstract: Wedgelet separation lines of neighboring blocks are predicted from each other by aligning the wedgelet separation lines of such neighboring blocks to each other, thereby reducing the side information coding rate that may be used.Type: GrantFiled: November 21, 2018Date of Patent: February 25, 2020Assignee: GE VIDEO COMPRESSION, LLCInventors: Philipp Merkle, Christian Bartnik, Haricharan Lakshman, Detlev Marpe, Karsten Mueller, Thomas Wiegand, Gerhard Tech
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Patent number: 10574981Abstract: Wedgelet separation lines of neighboring blocks are predicted from each other by aligning the wedgelet separation lines of such neighboring blocks to each other, thereby reducing the side information coding rate that may be used.Type: GrantFiled: October 3, 2017Date of Patent: February 25, 2020Assignee: GE VIDEO COMPRESSION, LLCInventors: Philipp Merkle, Christian Bartnik, Haricharan Lakshman, Detlev Marpe, Karsten Mueller, Thomas Wiegand, Gerhard Tech
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Patent number: 10567776Abstract: Although wedgelet-based partitioning seems to represent a better tradeoff between side information rate on the one hand and achievable variety in partitioning possibilities on the other hand, compared to contour partitioning, the ability to alleviate the constraints of the partitioning to the extent that the partitions have to be wedgelet partitions, enables applying relatively uncomplex statistical analysis onto overlaid spatially sampled texture information in order to derive a good predictor for the bi-segmentation in a depth/disparity map. Thus, in accordance with a first aspect it is exactly the increase of the freedom which alleviates the signaling overhead provided that co-located texture information in form of a picture is present. Another aspect pertains the possibility to save side information rate involved with signaling a respective coding mode supporting irregular partitioning.Type: GrantFiled: June 11, 2019Date of Patent: February 18, 2020Assignee: GE VIDEO COMPRESSION, LLCInventors: Philipp Merkle, Christian Bartnik, Haricharan Lakshman, Detlev Marpe, Karsten Mueller, Thomas Wiegand, Gerhard Tech
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Patent number: 10542263Abstract: The way of predicting a current block by assigning constant partition values to the partitions of a bi-partitioning of a block is quite effective, especially in case of coding sample arrays such as depth/disparity maps where the content of these sample arrays is mostly composed of plateaus or simple connected regions of similar value separated from each other by steep edges. The transmission of such constant partition values would, however, still need a considerable amount of side information which should be avoided. This side information rate may be further reduced if mean values of values of neighboring samples associated or adjoining the respective partitions are used as predictors for the constant partition values.Type: GrantFiled: April 16, 2019Date of Patent: January 21, 2020Assignee: GE VIDEO COMPRESSION, LLCInventors: Philipp Merkle, Christian Bartnik, Haricharan Lakshman, Detlev Marpe, Karsten Mueller, Thomas Wiegand, Gerhard Tech
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Patent number: 10542278Abstract: In accordance with a first aspect, the intra prediction direction of a neighboring, intra-predicted block is used in order to predict the extension direction of the wedgelet separation line of a current block, thereby reducing the side information rate necessitated in order to convey the partitioning information. In accordance with a second aspect, the idea is that previously reconstructed samples, i.e. reconstructed values of blocks preceding the current block in accordance with the coding/decoding order allow for at least a prediction of a correct placement of a starting point of the wedgelet separation line, namely by placing the starting point of the wedgelet separation line at a position of a maximum change between consecutive ones of a sequence of reconstructed values of samples of a line of samples extending adjacent to the current block along a circumference thereof. Both aspects may be used individually or in combination.Type: GrantFiled: April 29, 2019Date of Patent: January 21, 2020Assignee: GE VIDEO COMPRESSION, LLCInventors: Philipp Merkle, Christian Bartnik, Haricharan Lakshman, Detlev Marpe, Karsten Mueller, Thomas Wiegand, Gerhard Tech
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Publication number: 20200020151Abstract: A target view to a 3D scene depicted by a multiview image is determined. The multiview image comprising sampled views at sampled view positions distributed throughout a viewing volume. Each sampled view in the sampled views comprises a wide-field-of-view (WFOV) image and a WFOV depth map as seen from a respective sampled view position in the sampled view positions. The target view is used to select, from the sampled views, a set of sampled views. A display image is caused to be rendered on a display of a wearable device. The display image is generated based on a WFOV image and a WFOV depth map for each sampled view in the set of sampled views.Type: ApplicationFiled: September 23, 2019Publication date: January 16, 2020Applicant: Dolby Laboratories Licensing CorporationInventors: Haricharan LAKSHMAN, Ajit NINAN
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Publication number: 20200007869Abstract: A scalable video decoder is described which is configured to reconstruct a base layer signal from a coded data stream to obtain a reconstructed base layer signal; and reconstruct an enhancement layer signal including spatially or temporally predicting a portion of an enhancement layer signal, currently to be reconstructed, from an already reconstructed portion of the enhancement layer signal to obtain an enhancement layer internal prediction signal; forming, at the portion currently to be reconstructed, a weighted average of an inter-layer prediction signal obtained from the reconstructed base layer signal, and the enhancement layer internal prediction signal to obtain an enhancement layer prediction signal such that a weighting between the inter-layer prediction signal and the enhancement layer internal prediction signal varies over different spatial frequency components; and predictively reconstructing the enhancement layer signal using the enhancement layer prediction signal.Type: ApplicationFiled: July 2, 2019Publication date: January 2, 2020Inventors: Tobias HINZ, Haricharan LAKSHMAN, Jan STEGEMANN, Philipp HELLE, Mischa SIEKMANN, Karsten SUEHRING, Detlev MARPE, Heiko SCHWARZ, Christian BARTNIK, Ali Atef Ibrahim KHAIRAT ABDELHAMID, Heiner KIRCHHOFFER, Thomas WIEGAND
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Patent number: 10477210Abstract: A scalable video decoder is described which is configured to reconstruct a base layer signal from a coded data stream to obtain a reconstructed base layer signal; and reconstruct an enhancement layer signal including spatially or temporally predicting a portion of an enhancement layer signal, currently to be reconstructed, from an already reconstructed portion of the enhancement layer signal to obtain an enhancement layer internal prediction signal; forming, at the portion currently to be reconstructed, a weighted average of an inter-layer prediction signal obtained from the reconstructed base layer signal, and the enhancement layer internal prediction signal to obtain an enhancement layer prediction signal such that a weighting between the inter-layer prediction signal and the enhancement layer internal prediction signal varies over different spatial frequency components; and predictively reconstructing the enhancement layer signal using the enhancement layer prediction signal.Type: GrantFiled: March 24, 2015Date of Patent: November 12, 2019Assignee: GE VIDEO COMPRESSION, LLCInventors: Tobias Hinz, Haricharan Lakshman, Jan Stegemann, Philipp Helle, Mischa Siekmann, Karsten Suehring, Detlev Marpe, Heiko Schwarz, Christian Bartnik, Ali Atef Ibrahim Khairat Abdelhamid, Heiner Kirchhoffer, Thomas Wiegand
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Patent number: 10460509Abstract: A target view to a 3D scene depicted by a multiview image is determined. The multiview image comprising sampled views at sampled view positions distributed throughout a viewing volume. Each sampled view in the sampled views comprises a wide-field-of-view (WFOV) image and a WFOV depth map as seen from a respective sampled view position in the sampled view positions. The target view is used to select, from the sampled views, a set of sampled views. A display image is caused to be rendered on a display of a wearable device. The display image is generated based on a WFOV image and a WFOV depth map for each sampled view in the set of sampled views.Type: GrantFiled: November 2, 2018Date of Patent: October 29, 2019Assignee: Dolby Laboratories Licensing CorporationInventors: Haricharan Lakshman, Ajit Ninan
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Publication number: 20190297334Abstract: Although wedgelet-based partitioning seems to represent a better tradeoff between side information rate on the one hand and achievable variety in partitioning possibilities on the other hand, compared to contour partitioning, the ability to alleviate the constraints of the partitioning to the extent that the partitions have to be wedgelet partitions, enables applying relatively uncomplex statistical analysis onto overlaid spatially sampled texture information in order to derive a good predictor for the bi-segmentation in a depth/disparity map. Thus, in accordance with a first aspect it is exactly the increase of the freedom which alleviates the signaling overhead provided that co-located texture information in form of a picture is present. Another aspect pertains the possibility to save side information rate involved with signaling a respective coding mode supporting irregular partitioning.Type: ApplicationFiled: June 11, 2019Publication date: September 26, 2019Inventors: Philipp MERKLE, Christian BARTNIK, Haricharan LAKSHMAN, Detlev MARPE, Karsten MUELLER, Thomas WIEGAND, Gerhard TECH
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Publication number: 20190253729Abstract: In accordance with a first aspect, the intra prediction direction of a neighboring, intra-predicted block is used in order to predict the extension direction of the wedgelet separation line of a current block, thereby reducing the side information rate necessitated in order to convey the partitioning information. In accordance with a second aspect, the idea is that previously reconstructed samples, i.e. reconstructed values of blocks preceding the current block in accordance with the coding/decoding order allow for at least a prediction of a correct placement of a starting point of the wedgelet separation line, namely by placing the starting point of the wedgelet separation line at a position of a maximum change between consecutive ones of a sequence of reconstructed values of samples of a line of samples extending adjacent to the current block along a circumference thereof. Both aspects may be used individually or in combination.Type: ApplicationFiled: April 29, 2019Publication date: August 15, 2019Inventors: Philipp MERKLE, Christian BARTNIK, Haricharan LAKSHMAN, Detlev MARPE, Karsten MUELLER, Thomas WIEGAND, Gerhard TECH
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Publication number: 20190246120Abstract: The way of predicting a current block by assigning constant partition values to the partitions of a bi-partitioning of a block is quite effective, especially in case of coding sample arrays such as depth/disparity maps where the content of these sample arrays is mostly composed of plateaus or simple connected regions of similar value separated from each other by steep edges. The transmission of such constant partition values would, however, still need a considerable amount of side information which should be avoided. This side information rate may be further reduced if mean values of values of neighboring samples associated or adjoining the respective partitions are used as predictors for the constant partition values.Type: ApplicationFiled: April 16, 2019Publication date: August 8, 2019Inventors: Philipp MERKLE, Christian BARTNIK, Haricharan LAKSHMAN, Detlev MARPE, Karsten MUELLER, Thomas WIEGAND, Gerhard TECH
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Patent number: 10362317Abstract: Although wedgelet-based partitioning seems to represent a better tradeoff between side information rate on the one hand and achievable variety in partitioning possibilities on the other hand, compared to contour partitioning, the ability to alleviate the constraints of the partitioning to the extent that the partitions have to be wedgelet partitions, enables applying relatively uncomplex statistical analysis onto overlaid spatially sampled texture information in order to derive a good predictor for the bi-segmentation in a depth/disparity map. Thus, in accordance with a first aspect it is exactly the increase of the freedom which alleviates the signaling overhead provided that co-located texture information in form of a picture is present. Another aspect pertains the possibility to save side information rate involved with signaling a respective coding mode supporting irregular partitioning.Type: GrantFiled: July 28, 2017Date of Patent: July 23, 2019Assignee: GE VIDEO COMPRESSION, LLCInventors: Philipp Merkle, Christian Bartnik, Haricharan Lakshman, Detlev Marpe, Karsten Mueller, Thomas Wiegand, Gerhard Tech
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Patent number: 10341667Abstract: Although wedgelet-based partitioning seems to represent a better tradeoff between side information rate on the one hand and achievable variety in partitioning possibilities on the other hand, compared to contour partitioning, the ability to alleviate the constraints of the partitioning to the extent that the partitions have to be wedgelet partitions, enables applying relatively uncomplex statistical analysis onto overlaid spatially sampled texture information in order to derive a good predictor for the bi-segmentation in a depth/disparity map. Thus, in accordance with a first aspect it is exactly the increase of the freedom which alleviates the signaling overhead provided that co-located texture information in form of a picture is present. Another aspect pertains the possibility to save side information rate involved with signaling a respective coding mode supporting irregular partitioning.Type: GrantFiled: July 28, 2017Date of Patent: July 2, 2019Assignee: GE VIDEO COMPRESSION, LLCInventors: Philipp Merkle, Christian Bartnik, Haricharan Lakshman, Detlev Marpe, Karsten Mueller, Thomas Wiegand, Gerhard Tech
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Patent number: 10334255Abstract: The way of predicting a current block by assigning constant partition values to the partitions of a bi-partitioning of a block is quite effective, especially in case of coding sample arrays such as depth/disparity maps where the content of these sample arrays is mostly composed of plateaus or simple connected regions of similar value separated from each other by steep edges. The transmission of such constant partition values would, however, still need a considerable amount of side information which should be avoided. This side information rate may be further reduced if mean values of values of neighboring samples associated or adjoining the respective partitions are used as predictors for the constant partition values.Type: GrantFiled: July 20, 2017Date of Patent: June 25, 2019Assignee: GE VIDEO COMPRESSION, LLCInventors: Philipp Merkle, Christian Bartnik, Haricharan Lakshman, Detlev Marpe, Karsten Mueller, Thomas Wiegand, Gerhard Tech
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Patent number: 10321148Abstract: In accordance with a first aspect, the intra prediction direction of a neighboring, intra-predicted block is used in order to predict the extension direction of the wedgelet separation line of a current block, thereby reducing the side information rate necessitated in order to convey the partitioning information. In accordance with a second aspect, the idea is that previously reconstructed samples, i.e. reconstructed values of blocks preceding the current block in accordance with the coding/decoding order allow for at least a prediction of a correct placement of a starting point of the wedgelet separation line, namely by placing the starting point of the wedgelet separation line at a position of a maximum change between consecutive ones of a sequence of reconstructed values of samples of a line of samples extending adjacent to the current block along a circumference thereof. Both aspects may be used individually or in combination.Type: GrantFiled: July 24, 2017Date of Patent: June 11, 2019Assignee: GE VIDEO COMPRESSION, LLCInventors: Philipp Merkle, Christian Bartnik, Haricharan Lakshman, Detlev Marpe, Karsten Mueller, Thomas Wiegand, Gerhard Tech
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Patent number: 10321139Abstract: The way of predicting a current block by assigning constant partition values to the partitions of a bi-partitioning of a block is quite effective, especially in case of coding sample arrays such as depth/disparity maps where the content of these sample arrays is mostly composed of plateaus or simple connected regions of similar value separated from each other by steep edges. The transmission of such constant partition values would, however, still need a considerable amount of side information which should be avoided. This side information rate may be further reduced if mean values of values of neighboring samples associated or adjoining the respective partitions are used as predictors for the constant partition values.Type: GrantFiled: July 20, 2017Date of Patent: June 11, 2019Assignee: GE VIDEO COMPRESSION, LLCInventors: Philipp Merkle, Christian Bartnik, Haricharan Lakshman, Detlev Marpe, Karsten Mueller, Thomas Wiegand, Gerhard Tech
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Publication number: 20190139296Abstract: A target view to a 3D scene depicted by a multiview image is determined. The multiview image comprising sampled views at sampled view positions distributed throughout a viewing volume. Each sampled view in the sampled views comprises a wide-field-of-view (WFOV) image and a WFOV depth map as seen from a respective sampled view position in the sampled view positions. The target view is used to select, from the sampled views, a set of sampled views. A display image is caused to be rendered on a display of a wearable device. The display image is generated based on a WFOV image and a WFOV depth map for each sampled view in the set of sampled views.Type: ApplicationFiled: November 2, 2018Publication date: May 9, 2019Applicant: Dolby Laboratories Licensing CorporationInventors: Haricharan LAKSHMAN, Ajit NINAN
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Publication number: 20190116360Abstract: The coding efficiency of scalable video coding is increased by substituting missing spatial intra prediction parameter candidates in a spatial neighborhood of a current block of the enhancement layer by use of intra prediction parameters of a co-located block of the base layer signal. By this measure, the coding efficiency for coding the spatial intra prediction parameters is increased due to the improved prediction quality of the set of intra prediction parameters of the enhancement layer, or, more precisely stated, the increased likelihood, that appropriate predictors for the intra prediction parameters for an intra predicted block of the enhancement layer are available thereby increasing the likelihood that the signaling of the intra prediction parameter of the respective enhancement layer block may be performed, on average, with less bits.Type: ApplicationFiled: November 5, 2018Publication date: April 18, 2019Inventors: Tobias HINZ, Haricharan LAKSHMAN, Jan STEGEMANN, Philipp HELLE, Mischa SIEKMANN, Karsten SUEHRING, Detlev MARPE, Heiko SCHWARZ, Christian BARTNIK, Ali Atef Ibrahim KHAIRAT ABDELHAMID, Heiner KIRCHHOFFER, Thomas WIEGAND