Patents by Inventor Alan V. McCree
Alan V. McCree 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: 8024182Abstract: Packets of real-time information are sent with a source rate greater than zero kilobits per second, and a time or path or combined time/path diversity rate initially being zero kilobits per second. This results in a quality of service QoS, optionally measured at the sender or the receiver. When the QoS is on an unacceptable side of a threshold of acceptability, the sender sends diversity packets at an increased rate. Increasing the diversity rate while either reducing or maintaining the overall transmission rate is new. CELP-based multiple-description data partitioning sends the base or important information plus a subset of fixed excitation in one packet and sends the base or important information plus the complementary subset of fixed excitation in another packet. Reconstruction produces acceptable quality when only one of the two packets is received and better quality when both packets are received. Reconstruction provides for single and multiple lost packets.Type: GrantFiled: June 30, 2009Date of Patent: September 20, 2011Assignee: Texas Instruments IncorporatedInventors: Krishnasamy Anandakumar, Vishu R. Viswanathan, Alan V. McCree
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Publication number: 20110211573Abstract: In one form of the invention, a process of sending real-time information from a sender computer (103) to a receiver computer (105) coupled to the sender computer (103) by a packet network (100) wherein packets (111,113) sometimes become lost, includes steps of directing (441) packets (111) containing the real-time information from the sender computer (103) by at least one path (119) in the packet network (100) to the receiver computer (105), and directing packets (113) containing information dependent on the real-time information from the sender computer (103) by at least one path diversity path (117) in the packet network (100) to the same receiver computer (105).Type: ApplicationFiled: May 5, 2011Publication date: September 1, 2011Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Stephen J. Perkins, Alan Gatherer, Krishanasamy Anandakumar, Alan V. McCree, Vishu Viswanathan
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Patent number: 7961758Abstract: In one form of the invention, a process of sending real-time information from a sender computer (103) to a receiver computer (105) coupled to the sender computer (103) by a packet network (100) wherein packets (111,113) sometimes become lost, includes steps of directing (441) packets (111) containing the real-time information from the sender computer (103) by at least one path (119) in the packet network (100) to the receiver computer (105), and directing packets (113) containing information dependent on the real-time information from the sender computer (103) by at least one path diversity path (117) in the packet network (100) to the same receiver computer (105).Type: GrantFiled: December 15, 2009Date of Patent: June 14, 2011Assignee: Texas Instruments IncorporatedInventors: Stephen J. Perkins, Alan Gatherer, Krishnasamy Anandakumar, Alan V. McCree, Vishu Viswanathan
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Publication number: 20110004808Abstract: A media over packet networking appliance provides a network interface, a voice transducer, and at least one integrated circuit assembly coupling the voice transducer to the network interface. The at least one integrated circuit assembly provides media over packet transmissions and holds bits defining reconstruction of a packet stream having a primary stage and a secondary stage. The secondary stage has one or more of linear predictive coding parameters, long term prediction lags, parity check, and adaptive and fixed codebook gains. The packet stream has an instance of single packet loss, and the reconstruction includes receiving a packet sequence represented by P(n)P(n?1)?, [Lost Packet], P(n+2)P(n+1)?, and P(n+3)P(n+2)?, obtaining as information from the secondary stage one or more of the linear predictive coding parameters, long term prediction lags, parity check, and adaptive and fixed codebook gains, and performing an excitation reconstruction utilizing said packet sequence thus received.Type: ApplicationFiled: September 16, 2010Publication date: January 6, 2011Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Krishnasamy Anandakumar, Vishu R. Viswanathan, Alan V. McCree
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Patent number: 7822021Abstract: A media over packet networking appliance provides a network interface, a voice transducer, and at least one integrated circuit assembly coupling the voice transducer to the network interface. The at least one integrated circuit assembly provides media over packet transmissions and holds bits defining reconstruction of a packet stream having a primary stage and a secondary stage. The secondary stage has one or more of linear predictive coding parameters, long term prediction lags, parity check, and adaptive and fixed codebook gains. The packet stream has an instance of single packet loss, and the reconstruction includes receiving a packet sequence represented by P(n)P(n?1)?, [Lost Packet], P(n+2)P(n+1)?, and P(n+3)P(n+2)?, obtaining as information from the secondary stage one or more of the linear predictive coding parameters, long term prediction lags, parity check, and adaptive and fixed codebook gains, and performing an excitation reconstruction utilizing said packet sequence thus received.Type: GrantFiled: December 11, 2009Date of Patent: October 26, 2010Assignee: Texas Instruments IncorporatedInventors: Krishnasamy Anandakumar, Vishu R. Viswanathan, Alan V. McCree
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Patent number: 7778408Abstract: Hands-free phones with echo cancellation using dual filters, one fast adapting filter and one slow adapting filter; the choice of filters includes switching with hysteresis from recent performance, and the fast adapting filter has step size control to limit relative filter update energy and the slow adapting filter limits filter divergence.Type: GrantFiled: December 30, 2005Date of Patent: August 17, 2010Assignee: Texas Instruments IncorporatedInventors: Alan V. McCree, Takahiro Unno, Thierry Le Gall, Sebastien Guiriec
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Publication number: 20100091800Abstract: In one form of the invention, a process of sending real-time information from a sender computer (103) to a receiver computer (105) coupled to the sender computer (103) by a packet network (100) wherein packets (111,113) sometimes become lost, includes steps of directing (441) packets (111) containing the real-time information from the sender computer (103) by at least one path (119) in the packet network (100) to the receiver computer (105), and directing packets (113) containing information dependent on the real-time information from the sender computer (103) by at least one path diversity path (117) in the packet network (100) to the same receiver computer (105).Type: ApplicationFiled: December 15, 2009Publication date: April 15, 2010Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Stephen J. Perkins, Alan Gatherer, Krishnasamy Anandakumar, Alan V. McCree, Vishu Viswanathan
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Publication number: 20100085986Abstract: A media over packet networking appliance provides a network interface, a voice transducer, and at least one integrated circuit assembly coupling the voice transducer to the network interface. The at least one integrated circuit assembly provides media over packet transmissions and holds bits defining reconstruction of a packet stream having a primary stage and a secondary stage. The secondary stage has one or more of linear predictive coding parameters, long term prediction lags, parity check, and adaptive and fixed codebook gains. The packet stream has an instance of single packet loss, and the reconstruction includes receiving a packet sequence represented by P(n)P(n?1)?, [Lost Packet], P(n+2)P(n+1)?, and P(n+3)P(n+2)?, obtaining as information from the secondary stage one or more of the linear predictive coding parameters, long term prediction lags, parity check, and adaptive and fixed codebook gains, and performing an excitation reconstruction utilizing said packet sequence thus received.Type: ApplicationFiled: December 11, 2009Publication date: April 8, 2010Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Krishnasamy Anandakumar, Vishu R. Viswanathan, Alan V. McCree
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Patent number: 7693062Abstract: In one form of the invention, a process of sending real-time information from a sender computer (103) to a receiver computer (105) coupled to the sender computer (103) by a packet network (100) wherein packets (111,113) sometimes become lost, includes steps of directing (441) packets (111) containing the real-time information from the sender computer (103) by at least one path (119) in the packet network (100) to the receiver computer (105), and directing packets (113) containing information dependent on the real-time information from the sender computer (103) by at least one path diversity path (117) in the packet network (100) to the same receiver computer (105).Type: GrantFiled: July 6, 2005Date of Patent: April 6, 2010Assignee: Texas Instruments IncorporatedInventors: Stephen J. Perkins, Alan Gatherer, Krishanasamy Anandakumar, Alan V. McCree, Vishu Viswanathan
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Patent number: 7653045Abstract: A media over packet networking appliance provides a network interface, a voice transducer, and at least one integrated circuit assembly coupling the voice transducer to the network interface. The at least one integrated circuit assembly provides media over packet transmissions and holds bits defining reconstruction of a packet stream having a primary stage and a secondary stage. The secondary stage has one or more of linear predictive coding parameters, long term prediction lags, parity check, and adaptive and fixed codebook gains. The packet stream has an instance of single packet loss, and the reconstruction includes receiving a packet sequence represented by P(n)P(n?1)?, [Lost Packet], P(n+2)P(n+1)?, and P(n+3)P(n+2)?, obtaining as information from the secondary stage one or more of the linear predictive coding parameters, long term prediction lags, parity check, and adaptive and fixed codebook gains, and performing an excitation reconstruction utilizing said packet sequence thus received.Type: GrantFiled: July 6, 2004Date of Patent: January 26, 2010Assignee: Texas Instruments IncorporatedInventors: Krishnasamy Anandakumar, Vishu R. Viswanathan, Alan V. McCree
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Patent number: 7643630Abstract: Hands-free phones with voice activity detection using a comparison of frame power estimate with an adaptive frame noise power estimate, automatic gain control with fast adaptation and minimal speech distortion, echo cancellation updated in the frequency domain with stepsize optimization and smoothed spectral whitening, and echo suppression with adaptive talking-state transitions.Type: GrantFiled: June 24, 2005Date of Patent: January 5, 2010Assignee: Texas Instruments IncorporatedInventors: Alan V. McCree, Takahiro Unno, Thierry LeGall, Sebastien Guiriec
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Publication number: 20090323679Abstract: Packets of real-time information are sent with a source rate greater than zero kilobits per second, and a time or path or combined time/path diversity rate initially being zero kilobits per second. This results in a quality of service QoS, optionally measured at the sender or the receiver. When the QoS is on an unacceptable side of a threshold of acceptability, the sender sends diversity packets at an increased rate. Increasing the diversity rate while either reducing or maintaining the overall transmission rate is new. CELP-based multiple-description data partitioning sends the base or important information plus a subset of fixed excitation in one packet and sends the base or important information plus the complementary subset of fixed excitation in another packet. Reconstruction produces acceptable quality when only one of the two packets is received and better quality when both packets are received. Reconstruction provides for single and multiple lost packets.Type: ApplicationFiled: September 8, 2009Publication date: December 31, 2009Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Krishnasamy Anandakumar, Vishu R. Viswanathan, Alan V. McCree
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Publication number: 20090268724Abstract: Packets of real-time information are sent with a source rate greater than zero kilobits per second, and a time or path or combined time/path diversity rate initially being zero kilobits per second. This results in a quality of service QoS, optionally measured at the sender or the receiver. When the QoS is on an unacceptable side of a threshold of acceptability, the sender sends diversity packets at an increased rate. Increasing the diversity rate while either reducing or maintaining the overall transmission rate is new. CELP-based multiple-description data partitioning sends the base or important information plus a subset of fixed excitation in one packet and sends the base or important information plus the complementary subset of fixed excitation in another packet. Reconstruction produces acceptable quality when only one of the two packets is received and better quality when both packets are received. Reconstruction provides for single and multiple lost packets.Type: ApplicationFiled: June 30, 2009Publication date: October 29, 2009Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Krishnasamy Anandakumar, Vishu R. Viswanathan, Alan V. McCree
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Patent number: 7606164Abstract: A process (111,101) of sending packets of real-time information at a sender (311) includes initially generating packets of real-time information with a source rate (s11) greater than zero kilobits per second, and a time or path or combined time/path diversity rate (d11) initially being at least zero kilobits per second. Sending the packets results in a quality of service QoS, optionally measured at the sender (311). Rate/diversity adaptation decision may be performed at receiver (361?) instead. When the QoS is on an unacceptable side of a threshold of acceptability (Th1), the sender increases the diversity rate (d11 to d22) and sends not only additional ones of the packets of real-time information but also sends diversity packets at the increased diversity rate (d22). Increasing the diversity rate (d11 to d22) while either reducing or maintaining the overall transmission rate (sij+dij) is an important new improvement.Type: GrantFiled: March 31, 2004Date of Patent: October 20, 2009Assignee: Texas Instruments IncorporatedInventors: Krishnasamy Anandakumar, Vishu R. Viswanathan, Alan V. McCree
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Patent number: 7577248Abstract: Hands-free phones with voice activity detection using a comparison of frame power estimate with an adaptive frame noise power estimate, automatic gain control with fast adaptation and minimal speech distortion, echo cancellation updated in the frequency domain with stepsize optimization and smoothed spectral whitening, and echo suppression with adaptive talking-state transitions.Type: GrantFiled: June 24, 2005Date of Patent: August 18, 2009Assignee: Texas Instruments IncorporatedInventor: Alan V. McCree
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Patent number: 7574351Abstract: Packets of real-time information are sent with a source rate greater than zero kilobits per second, and a time or path or combined time/path diversity rate initially being zero kilobits per second. This results in a quality of service QoS, optionally measured at the sender or the receiver. When the QoS is on an unacceptable side of a threshold of acceptability, the sender sends diversity packets at an increased rate. Increasing the diversity rate while either reducing or maintaining the overall transmission rate is new. CELP-based multiple-description data partitioning sends the base or important information plus a subset of fixed excitation in one packet and sends the base or important information plus the complementary subset of fixed excitation in another packet. Reconstruction produces acceptable quality when only one of the two packets is received and better quality when both packets are received. Reconstruction provides for single and multiple lost packets.Type: GrantFiled: March 30, 2004Date of Patent: August 11, 2009Assignee: Texas Instruments IncorporatedInventors: Krishnasamy Anandakumar, Vishu R. Viswanathan, Alan V. McCree
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Publication number: 20080243495Abstract: Packetized CELP-encoded speech playout with frame truncation during silence and frame expansion method dependent upon voicing classification with voiced frame expansion maintaining phasealignment.Type: ApplicationFiled: June 10, 2008Publication date: October 2, 2008Inventors: Krishnasamy Anandakumar, Alan V. McCree, Erdal Paksoy
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Patent number: 7330814Abstract: A speech encoder/decoder for wideband speech with a partitioning of wideband into lowband and highband, convenient coding of the lowband, and LP excited by noise plus some periodicity for the highband. The embedded lowband may be extracted for a lower bit rate decoder.Type: GrantFiled: May 15, 2001Date of Patent: February 12, 2008Assignee: Texas Instruments IncorporatedInventor: Alan V. McCree
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Patent number: 7295974Abstract: Linear predictive system with classification of LP residual Fourier coefficients into two or more overlapping classes, and each class has its own vector quantization codebook(s). The use of strong and weak predictors minimizes codebook size by only quantizing the difference between Fourier coefficients of a frame and the Fourier coefficients predicted from a prior frame. The choice of using either a strong or weak predictor adapts to the prior choice of predictor so that a strong predictor following a weak predictor is changed to a weak predictor to insure attenuation of error propagation as arise from frame erasures.Type: GrantFiled: March 9, 2000Date of Patent: November 13, 2007Assignee: Texas Instruments IncorporatedInventors: Jacek Stachurski, Alan V McCree
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Patent number: 7260523Abstract: An improved sub-band speech coding system is provided by subdividing signals into a lower an higher subband, downsampling the lower subband before coding and coding the higher subband without downsampling. The decoder includes decoding and upsampling of the lower subband and decoding the higher subband and adding the higher subband to the lower subband.Type: GrantFiled: December 7, 2000Date of Patent: August 21, 2007Assignee: Texas Instruments IncorporatedInventors: Erdal Paksoy, Alan V. McCree