Patents Represented by Attorney, Agent or Law Firm Carlton H. Hoel
  • Patent number: 7260523
    Abstract: 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: Grant
    Filed: December 7, 2000
    Date of Patent: August 21, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Erdal Paksoy, Alan V. McCree
  • Patent number: 7231093
    Abstract: Estimation of the code size of variable length encoding of quantized DCT coefficients by summation over histogram bins of products of number of bin members and a code size of an average run of zero coefficients coupled with a representative level from the bin. The estimation provides low-complexity feedback for quantization level adjustment to obtain variable length code size target without actual performance of a quantization level plus variable length encoding.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: June 12, 2007
    Assignee: Texas Instuments Incorporated
    Inventors: Osamu Koshiba, Akira Osamoto, Satoru Yamauchi
  • Patent number: 7222070
    Abstract: Linear predictive speech coding system with classification of frames and a hybrid coder using both waveform coding and parametric coding for different classes of frames. Phase alignment for a parametric coder aligns synthesized speech frames with adjacent waveform coder synthesized frames. Zero phase alignment of speech prior to waveform coding aligns synthesized speech frames of a waveform coder with frames synthesized with a parametric coder. Inter-frame interpolation of LP coefficients suppresses artifacts in resultant synthesized speech frames.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: May 22, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Jacek Stachurski, Alan V. McCree
  • Patent number: 7202877
    Abstract: Computation of sprite position and size in JSR-184 with revised modelview matrix made with column vector lengths of original modelview matrix.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: April 10, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: Thomas Olson
  • Patent number: 7203373
    Abstract: A method of run-length encoding for known block size, such as image/video compression with block transform, such as DCT, with end of block indication suppressed when the end of the block can be inferred from the prior coding symbols.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: April 10, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: Minhua Zhou
  • Patent number: 7203237
    Abstract: Transcoding as from MPEG-2 SDTV to MPEG-4 CIF reuses motion vectors and downsamples in the frequency (DCT) domain with differing treatments of frame-DCT and field-DCT blocks, and alternatively uses de-interlacing IDCT with respect to the row dimension plus deferred column downsampling for reference frame blocks.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: April 10, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: Felix C. Fernandes
  • Patent number: 7185037
    Abstract: Integer transforms of 4×4 blocks of the type used in proposed H.26L but adapted to 16-bit arithmetic by shifts after matrix multiplications and integer approximation matrices absorbing scaling factors.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: February 27, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: Minhua Zhou
  • Patent number: 7184457
    Abstract: Spread spectrum rake receiver estimates number of paths within a chip interval and assigns corresponding fingers. Cross-correlation matrix eigenvalues or direct BER estimates for differing numbers of fingers determine whether one or two fingers assigned to the group of paths within a chip.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: February 27, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Timothy M. Schmidl, Srinath Hosur, Anand Dabak, Aris Papasakellariou
  • Patent number: 7184080
    Abstract: Automatic white balancing and/or autoexposure as useful in a digital camera extracts color channel gains from comparisons of image colors with reference colors under various color temperature illuminants and/or extracts exposure settings from illuminance mean, illuminance variance, illuminance minimum, and illuminance maximum in areas of an image with a trained neural network.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: February 27, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Nasser Kehtarnavaz, Hyuk-Joon Oh
  • Patent number: 7181167
    Abstract: Closed loop multiple-antenna wireless communications system with antenna weights determined by maximizing a composite channel signal-to-interference-plus-noise ratio minimum. Multiplexed symbol streams over subsets of antennas enhance throughput.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: February 20, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Eko N. Onggosanusi, Anand G. Dabak, Timothy M. Schmidl
  • Patent number: 7181073
    Abstract: An image coding method using wavelet decomposition and coding clusters of four-children coefficients bitplane-wise including value-bits for significance and refinement, and tree-bits for tree structure significance.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: February 20, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: Jie Liang
  • Patent number: 7180275
    Abstract: A DC-DC high frequency boost converter with a supply voltage input (110), a boosted voltage output (112), a series circuit of an inductor (114) and a rectifying device (116) connected in series between said supply voltage input (110) and said boosted voltage output (112), has a switch (124) connected between ground and a connection node (120) of said inductor (114) and said rectifying device (116). A control circuit (126) is provided for controlling said switch (124), and a zero inductor current detection circuit (128) is provided that compares a voltage (Un) on said connection node (120) with a reference voltage (Uref) and provides a zero inductor current indication (Comp) when both voltages are equal.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: February 20, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: Stefan Reithmaier
  • Patent number: 7176821
    Abstract: A digital sigma-delta modulator requiring minimal die area and dissipating minimal power is formed with a plurality of integration stages coupled in tandem between an input node and an output node. The bit width of signals in the integration stages is progressively reduced from the first to the last integration stage without compromising modulator accuracy. A quantizer between the last integration stage and the output node provides the final reduction of signal bit width. The gain of the modulator feedforward and feedback paths are integer powers of two to further simplify the digital computation. In an exemplary implementation, three integration stages to form a third-order modulator are coupled in tandem between the input node and the output node. The gains of feedback and feedforward paths in one preferred embodiment are unity, and in some embodiments, one feedforward path has gain of 0.5.
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: February 13, 2007
    Assignee: Texas Instruments Incorported
    Inventors: Louis Albert Williams, III, Francesco Cavaliere
  • Patent number: 7176815
    Abstract: Context-based adapative binary arithmetic coding (CABAC), as used in video standards such as H.264/AVC, with a renormalization of the interval low value plus range that includes partitioning of the bits of the low value to provide output bits plus low value update without bit-level iterations or aggregation of output bits until a full byte can be output.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: February 13, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Ching-Yu Hung, Shraddha Gondkar, Jagadeesh Sankaran
  • Patent number: 7176726
    Abstract: A loss-of-signal (LOS) detector includes a variable gain amplifier with an input receiving an input signal, a threshold comparator with a first input receiving a signal derived from an output of the variable gain amplifier, a second input receiving a reference level and an output providing a loss-of-signal indication signal. The variable gain amplifier has a gain control input receiving a gain control signal derived from the output of the threshold comparator and such that the gain of the variable gain amplifier is set to a lower value when the loss-of-signal indication signal is active, and set to a higher value when the loss-of-signal indication signal is not active. Accordingly, the LOS detector needs only one decision level for both of the LOS and NotLOS decisions, which is set in the linear range of the signal detector so that the hysteresis is reproduced precisely.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: February 13, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: Andreas Bock
  • Patent number: 7167522
    Abstract: Decomposition of deblocking filters used in block-based video compression allows reduction of computational redundancies.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: January 23, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: Jennifer Webb
  • Patent number: 7151414
    Abstract: A method and circuit for frequency synthesis using a low drift current controlled oscillator configured to provide a wide output frequency and high accuracy are provided. An exemplary frequency synthesis circuit is configured for programmable control of a center frequency of the current controlled oscillator to provide a wide range of output frequencies with high accuracy. In accordance with an exemplary embodiment of the present invention, an exemplary circuit comprises a phase-locked loop (PLL) circuit comprising a phase detector, a charge pump, a current controlled oscillator and a divider circuit. For programmable control of the current controlled oscillator, the PLL circuit further comprises a trim digital-to-analog converter (DAC) configured to provide a trimmed current signal for control of the current controlled oscillator.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: December 19, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Johnnie Molina, Hugo Cheung, Rituparna Ghosh, Ramesh Saripalli
  • Patent number: 7149253
    Abstract: A frequency division multiplexing wireless transmission on two or more antennas with the set of symbols on subcarriers of a burst transmitted by one antenna transformed into another set of symbols on the subcarriers for the corresponding burst transmitted by another antenna. This helps overcome fading of the wireless channel by diversity.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: December 12, 2006
    Assignee: Texas Instruments Incorporated
    Inventor: Srinath Hosur
  • Patent number: 7139854
    Abstract: Apparatus and methods are disclosed herein that provide reduced bus transaction latency on a bus architecture that includes at least one master coupled to a plurality of slaves. As disclosed herein, a device (e.g., a slave) may include bus logic and host logic coupled to the bus logic. The bus logic may obtain a serialization token permitting the host logic to complete a transaction received by the bus logic via the bus. Further, the bus logic may keep the serialization token to complete at least one other transaction.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: November 21, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Jonathan Y. Zhang, Robert J. P. Nychka, Eric L. P. Badi
  • Patent number: 7139700
    Abstract: Linear predictive speech coding system with classification of frames and a hybrid coder using both waveform coding and parametric coding for different classes of frames. Phase alignment for a parametric coder aligns synthesized speech frames with adjacent waveform coder synthesized frames. Zero phase alignment of speech prior to waveform coding aligns synthesized speech frames of a waveform coder with frames synthesized with a parametric coder. Inter-frame interpolation of LP coefficients suppresses artifacts in resultant synthesized speech frames.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: November 21, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Jacek Stachurski, Alan V. McCree