Patents by Inventor Brian W. Kroeger

Brian W. Kroeger 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).

  • Patent number: 10666416
    Abstract: A method for processing audio signals in a radio transmitter, includes: receiving an analog audio sample stream and a digital audio sample stream; determining offsets in time between the analog audio stream and the digital audio stream using a normalized cross-correlation of audio envelopes of the analog audio sample stream and the digital audio sample stream; filtering the determined offsets in time to produce filtered offset values; determining an alignment slip adjustment value as a function of the filtered offset values; aligning the analog audio sample stream and the digital audio sample stream using the determined alignment slip adjustment value; and generating a hybrid radio signal for broadcast that includes time-aligned analog audio and digital audio.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: May 26, 2020
    Assignee: Ibiquity Digital Corporation
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Publication number: 20190349132
    Abstract: A radio transmitter comprises transmitting circuitry and processing circuitry. The transmitting circuitry broadcasts a frequency modulation (FM) in-band on-channel (IBOC) radio signal, wherein the FM IBOC radio signal includes multiple subcarriers grouped into multiple frequency partitions. The processing circuitry is configured to receive input bits for transmitting; encode and puncture the input bits using forward error correction (FEC) encoding; distribute encoded input bits between a main encoded component and a backup encoded component, wherein encoded bits of the backup encoded component are delayed for a specified duration relative to encoded bits of the main encoded component; allocate the encoded input bits of the main and backup encoded components into frequency diverse sidebands of the FM IBOC radio signal; and modulate the encoded input bits for transmitting using the frequency diverse sidebands of the FM IBOC radio signal, wherein the modulation is a type of quadrature amplitude modulation (QAM).
    Type: Application
    Filed: May 18, 2018
    Publication date: November 14, 2019
    Inventors: Paul J. Peyla, Brian W. Kroeger, Jeffrey S. Baird
  • Patent number: 10355908
    Abstract: A radio receiver comprises physical layer circuitry and processor circuitry. The physical layer circuitry receives quadrature amplitude modulation (QAM) symbols via a plurality of subcarriers included in a broadcast radio signal. Each received QAM symbol is a complex symbol comprising multiple bits of encoded source information. The processing circuitry demodulates the received data symbols, generates a constellation sample for each received QAM symbol, generates a soft metric for each bit of encoded information of the received QAM symbols using the constellation sample, and multiplies the soft metric by a channel state information (CSI) weight to produce a Log-likelihood Ratio (LLR) approximation for each bit of encoded information of the received QAM symbols.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: July 16, 2019
    Assignee: Ibiquity Digital Corporation
    Inventors: Paul J. Peyla, Brian W. Kroeger
  • Publication number: 20190190691
    Abstract: A method for processing audio signals in a radio transmitter, includes: receiving an analog audio sample stream and a digital audio sample stream; determining offsets in time between the analog audio stream and the digital audio stream using a normalized cross-correlation of audio envelopes of the analog audio sample stream and the digital audio sample stream; filtering the determined offsets in time to produce filtered offset values; determining an alignment slip adjustment value as a function of the filtered offset values; aligning the analog audio sample stream and the digital audio sample stream using the determined alignment slip adjustment value; and generating a hybrid radio signal for broadcast that includes time-aligned analog audio and digital audio.
    Type: Application
    Filed: February 25, 2019
    Publication date: June 20, 2019
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Patent number: 10248496
    Abstract: A method for processing a digital signal includes: receiving a plurality of protocol data units, each having a header including a plurality of control word bits; and a plurality of audio frames, each including a cyclic redundancy check code; decoding the protocol data units using an iterative decoding technique, wherein the iterative decoding technique uses a soft output decoding algorithm for iterations after the first iteration; and using decoded cyclic redundancy check codes to flag the audio frames containing errors. A receiver that implements the method is also provided.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: April 2, 2019
    Assignee: Ibiquity Digital Corporation
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Patent number: 10225070
    Abstract: A method for processing a digital audio broadcast signal in a radio receiver, includes: receiving a hybrid broadcast signal; demodulating the hybrid broadcast signal to produce an analog audio stream and a digital audio stream; and using a normalized cross-correlation of envelopes of the analog audio stream and the digital audio stream to measure a time offset between the analog audio stream and the digital audio stream. The time offset can be used to align the analog audio stream and the digital audio stream for subsequent blending of an output of the radio receiver from the analog audio stream to the digital audio stream or from the digital audio stream to the analog audio stream.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: March 5, 2019
    Assignee: Ibiquity Digital Corporation
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Publication number: 20180139035
    Abstract: A method for processing a digital audio broadcast signal in a radio receiver, includes: receiving a hybrid broadcast signal; demodulating the hybrid broadcast signal to produce an analog audio stream and a digital audio stream; and using a normalized cross-correlation of envelopes of the analog audio stream and the digital audio stream to measure a time offset between the analog audio stream and the digital audio stream. The time offset can be used to align the analog audio stream and the digital audio stream for subsequent blending of an output of the radio receiver from the analog audio stream to the digital audio stream or from the digital audio stream to the analog audio stream.
    Type: Application
    Filed: November 27, 2017
    Publication date: May 17, 2018
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Patent number: 9832007
    Abstract: A method for processing a digital audio broadcast signal in a radio receiver, includes: receiving a hybrid broadcast signal; demodulating the hybrid broadcast signal to produce an analog audio stream and a digital audio stream; and using a normalized cross-correlation of envelopes of the analog audio stream and the digital audio stream to measure a time offset between the analog audio stream and the digital audio stream. The time offset can be used to align the analog audio stream and the digital audio stream for subsequent blending of an output of the radio receiver from the analog audio stream to the digital audio stream or from the digital audio stream to the analog audio stream.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: November 28, 2017
    Assignee: Ibiquity Digital Corporation
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Publication number: 20170302432
    Abstract: A method for processing a digital audio broadcast signal in a radio receiver, includes: receiving a hybrid broadcast signal; demodulating the hybrid broadcast signal to produce an analog audio stream and a digital audio stream; and using a normalized cross-correlation of envelopes of the analog audio stream and the digital audio stream to measure a time offset between the analog audio stream and the digital audio stream. The time offset can be used to align the analog audio stream and the digital audio stream for subsequent blending of an output of the radio receiver from the analog audio stream to the digital audio stream or from the digital audio stream to the analog audio stream.
    Type: Application
    Filed: April 14, 2016
    Publication date: October 19, 2017
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Publication number: 20170272143
    Abstract: A method for processing a digital audio broadcast signal in a radio receiver includes: receiving a digital audio broadcast signal; demodulating the digital audio broadcast signal to produce an analog audio stream and a digital audio stream; determining a digital signal quality value for the digital audio stream; blending an output of the radio receiver from the analog audio stream to the digital audio stream when the digital signal quality value exceeds an adaptive analog-to-digital threshold value; and blending the output of the radio receiver from the digital audio stream to the analog audio stream when the digital signal quality value falls below an adaptive digital-to-analog threshold value, wherein the adaptive digital-to-analog threshold value is lower than the adaptive analog-to-digital threshold value.
    Type: Application
    Filed: March 16, 2016
    Publication date: September 21, 2017
    Inventors: Brian W. Kroeger, Paul J. Peyla, Jeffrey S. Baird
  • Patent number: 9768853
    Abstract: A method for processing a digital audio broadcast signal in a radio receiver includes: receiving a digital audio broadcast signal; demodulating the digital audio broadcast signal to produce an analog audio stream and a digital audio stream; determining a digital signal quality value for the digital audio stream; blending an output of the radio receiver from the analog audio stream to the digital audio stream when the digital signal quality value exceeds an adaptive analog-to-digital threshold value; and blending the output of the radio receiver from the digital audio stream to the analog audio stream when the digital signal quality value falls below an adaptive digital-to-analog threshold value, wherein the adaptive digital-to-analog threshold value is lower than the adaptive analog-to-digital threshold value.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: September 19, 2017
    Assignee: Ibiquity Digital Corporation
    Inventors: Brian W. Kroeger, Paul J. Peyla, Jeffrey S. Baird
  • Publication number: 20170155413
    Abstract: A method is disclosed which comprises receiving a radio signal; sampling and filtering the radio signal to isolate the FM portion; demodulating the FM portion of the received signal; applying a sliding window to the first, second, and third samples; and, adjusting the value of the second sample if the product of the second sample times the sum of the first and third samples is less than a threshold value. In various embodiments, an apparatus may be provided which comprises an input for receiving a radio signal and processing circuitry for performing various methods described herein.
    Type: Application
    Filed: February 13, 2017
    Publication date: June 1, 2017
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Patent number: 9634704
    Abstract: A method includes: receiving an FM radio signal including an analog-modulated portion; digitally sampling an analog-modulated portion of the radio signal to produce a plurality of samples; using a ratio between an average magnitude and an RMS magnitude of a block of the samples to compute a signal quality metric; detecting sum and difference components of the baseband multiplex signal content; using the baseband content to produce an output signal; and blending the output signal from stereo to monaural as the signal quality metric falls below a threshold value.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: April 25, 2017
    Assignee: iBiquity Digital Corporation
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Patent number: 9544039
    Abstract: A method for detecting the digital quality of a radio signal includes: receiving a radio signal including an analog modulated portion; digitally sampling an analog modulated portion of the radio signal to produce a plurality of samples; using a ratio between an average magnitude and an RMS magnitude of a block of the samples to compute an analog signal quality metric. Receivers that implement the method are also provided.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: January 10, 2017
    Assignee: iBiquity Digital Corporation
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Patent number: 9479197
    Abstract: A method includes: constructing complementary low density parity check codewords by generating a first codeword having a first code rate; and partitioning the first codeword by assigning groups of bits of the first codeword to four quarter-partitions, wherein each of the quarter partitions includes bits in one half of one of four independently decodable semi-codewords each having a second code rate that is larger than the first code rate. Receivers that receive signals produced by the method are also disclosed.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: October 25, 2016
    Assignee: iBiquity Digital Corporation
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Publication number: 20160043795
    Abstract: A method for detecting the digital quality of a radio signal includes: receiving a radio signal including an analog modulated portion; digitally sampling an analog modulated portion of the radio signal to produce a plurality of samples; using a ratio between an average magnitude and an RMS magnitude of a block of the samples to compute an analog signal quality metric. Receivers that implement the method are also provided.
    Type: Application
    Filed: October 22, 2015
    Publication date: February 11, 2016
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Publication number: 20160043760
    Abstract: A method includes: receiving an FM radio signal including an analog-modulated portion; digitally sampling an analog-modulated portion of the radio signal to produce a plurality of samples; using a ratio between an average magnitude and an RMS magnitude of a block of the samples to compute a signal quality metric; detecting sum and difference components of the baseband multiplex signal content; using the baseband content to produce an output signal; and blending the output signal from stereo to monaural as the signal quality metric falls below a threshold value.
    Type: Application
    Filed: October 22, 2015
    Publication date: February 11, 2016
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Publication number: 20150341049
    Abstract: A method includes: constructing complementary low density parity check codewords by generating a first codeword having a first code rate; and partitioning the first codeword by assigning groups of bits of the first codeword to four quarter-partitions, wherein each of the quarter partitions includes bits in one half of one of four independently decodable semi-codewords each having a second code rate that is larger than the first code rate. Receivers that receive signals produced by the method are also disclosed.
    Type: Application
    Filed: August 4, 2015
    Publication date: November 26, 2015
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Patent number: 9184961
    Abstract: A method includes: receiving an FM radio signal including an analog-modulated portion; digitally sampling an analog-modulated portion of the radio signal to produce a plurality of samples; using a ratio between an average magnitude and an RMS magnitude of a block of the samples to compute a signal quality metric; detecting sum and difference components of the baseband multiplex signal content; using the baseband content to produce an output signal; and blending the output signal from stereo to monaural as the signal quality metric falls below a threshold value.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: November 10, 2015
    Assignee: iBiquity Digital Corporation
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Patent number: 9184804
    Abstract: A method for detecting the digital quality of a radio signal includes: receiving a radio signal including a digital portion modulated by a series of symbols each including a plurality of samples; computing correlation points between endpoint samples in cyclic prefix regions of adjacent symbols; and using the correlation points to produce a digital signal quality metric. Receivers that implement the method are also provided.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: November 10, 2015
    Assignee: iBiquity Digital Corporation
    Inventors: Brian W. Kroeger, Paul J. Peyla