Patents by Inventor Yi Ying Liao

Yi Ying Liao 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: 9749157
    Abstract: A sequence estimation device includes a grouping unit, a sequence estimation unit and a combination unit. The grouping unit groups a first plurality of equalized signals into a plurality of equalized signal groups according to a grouping rule. The sequence estimation unit, coupled to the grouping unit, processes the plurality of equalized signal groups according to a sequence estimation rule to obtain a plurality of estimated signal groups, respectively. The combination unit, coupled to the sequence estimation unit, permutes the plurality of estimated signal groups to a plurality of estimated signals according to the grouping rule.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: August 29, 2017
    Assignee: MStar Semiconductor, Inc.
    Inventors: Yi-Ying Liao, Tai-Lai Tung
  • Publication number: 20170244589
    Abstract: A receiving circuit capable of estimating frequency offset includes a front circuit and a calculation circuit. The front circuit receives a remote signal to generate a received signal. The calculation circuit includes: an exponentiation module, calculating an exponent of a power to generate a high-order signal; a frequency-domain transform module, performing frequency-domain transform on the high-order signal to generate a spectrum; a peak searching module, searching for a peak of the amplitude of the spectrum to generate a peak coordinate value reflecting a frequency where the peak occurs; an offset estimating module, adding the peak coordinate value with a compensation value to generate a sum, dividing the sum by a first divisor to generate a remainder, subtracting the compensation value from the remainder to generate a difference, and dividing the difference by a second divisor to generate an offset estimation value reflecting the frequency offset.
    Type: Application
    Filed: January 5, 2016
    Publication date: August 24, 2017
    Inventors: Yu-Che SU, Yi-Ying LIAO, Kuan-Chou LEE, Tai-Lai TUNG
  • Publication number: 20170222836
    Abstract: A sequence estimation device includes: a soft decision processing unit, generating a plurality of input signals including soft information according to a plurality of first equalized signals, an equalizer weight and a plurality of estimation signals corresponding to the equalizer weight; and a decoding unit, coupled to the soft decision processing unit, decoding the plurality of input signals including the soft information according to a decoding rule to generate a plurality of output signals.
    Type: Application
    Filed: September 22, 2016
    Publication date: August 3, 2017
    Inventors: Yi-Ying Liao, Tai-Lai Tung
  • Patent number: 9654307
    Abstract: A communication apparatus for correcting a situation of a spectrum inverted signal includes a channel estimation module and an equalization module. The channel estimation module determines a channel estimation parameter, and receives at least one frame signal to generate a convolution restored frame signal corresponding to the frame signal. The equalization module includes a first computation circuit and a second computation circuit. The first computation circuit receives the channel estimation parameter and the convolution restored frame signal to generate a transformation channel estimation parameter and a transformed convolution restored frame signal. The second computation circuit receives the transformed channel estimation parameter and the transformed convolution restored frame signal to generate an original frame signal corresponding to the frame signal.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: May 16, 2017
    Assignee: MStar Semiconductor, Inc.
    Inventors: Yi-Ying Liao, Tai-Lai Tung
  • Publication number: 20170063578
    Abstract: A sequence estimation device includes a grouping unit, a sequence estimation unit and a combination unit. The grouping unit groups a first plurality of equalized signals into a plurality of equalized signal groups according to a grouping rule. The sequence estimation unit, coupled to the grouping unit, processes the plurality of equalized signal groups according to a sequence estimation rule to obtain a plurality of estimated signal groups, respectively. The combination unit, coupled to the sequence estimation unit, permutes the plurality of estimated signal groups to a plurality of estimated signals according to the grouping rule.
    Type: Application
    Filed: October 8, 2015
    Publication date: March 2, 2017
    Inventors: Yi-Ying Liao, Tai-Lai Tung
  • Patent number: 9577789
    Abstract: A receiving circuit for a digital television is provided. The receiving circuit of the digital television, adapted to process a digital television signal to generate transmission data, includes: a front-end circuit, configured to process the digital television signal to generate an interleaved signal; a setting unit, configured to provide a setting value associated with a digital video standard of the digital television signal; a frequency de-interleaving and time de-interleaving circuit, configured to select a frequency de-interleaving scheme and a time de-interleaving scheme corresponding to different digital video standards according to the setting value, and to process the interleaved signal to generate a de-interleaved signal; a quadrature amplitude modulation (QAM) demapping circuit, configured to demap the de-interleaved signal to generate a demapped signal; and a decoder, configured to decode the demapped signal to generate the transmission data.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: February 21, 2017
    Assignee: MStar Semiconductor, Inc.
    Inventors: Chun-Chieh Wang, Tai-Lai Tung, Ko-Yin Lai, Yi-Ying Liao
  • Patent number: 9571306
    Abstract: A device for eliminating a channel effect is provided. A time-domain channel estimating unit generates a channel estimation result according to a first reference signal. A fast Fourier transform (FFT) unit performs FFT on the channel estimation result to generate a plurality of channel frequency responses corresponding to a plurality of frequency indices. An adjusting unit receives a plurality of input signals, and determines whether to adjust the input signal of each of the frequency indices according to the amplitude of the channel frequency response of each of the frequency indices to generate a set of adjusted signals. An inverse fast Fourier transform (IFFT) unit performs IFFT on a set of output signals associated with the set of adjusted signals to generate a feedback signal. The time-domain channel estimating unit further generates another channel estimation result according to a second reference signal and the feedback signal.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: February 14, 2017
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Yi-Ying Liao, Tai-Lai Tung
  • Publication number: 20160373276
    Abstract: A device for eliminating a channel effect is provided. A time-domain channel estimating unit generates a channel estimation result according to a first reference signal. A fast Fourier transform (FFT) unit performs FFT on the channel estimation result to generate a plurality of channel frequency responses corresponding to a plurality of frequency indices. An adjusting unit receives a plurality of input signals, and determines whether to adjust the input signal of each of the frequency indices according to the amplitude of the channel frequency response of each of the frequency indices to generate a set of adjusted signals. An inverse fast Fourier transform (IFFT) unit performs IFFT on a set of output signals associated with the set of adjusted signals to generate a feedback signal. The time-domain channel estimating unit further generates another channel estimation result according to a second reference signal and the feedback signal.
    Type: Application
    Filed: August 6, 2015
    Publication date: December 22, 2016
    Inventors: Yi-Ying Liao, Tai-Lai Tung
  • Patent number: 9432058
    Abstract: An error correction apparatus for a digital signal received by a signal reception terminal includes two error correction modules. The first error correction module performs first error correction on an input signal to generate an intermediate signal satisfying a termination condition. The second error correction module receives and selectively performs second error correction on the intermediate signal to generate a corrected signal. The termination condition is associated with a maximum error correction capability of the second error correction.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: August 30, 2016
    Assignee: MStar Semiconductor, Inc.
    Inventors: Yu-Hsien Ku, Tung-Sheng Lin, Yi-Ying Liao
  • Publication number: 20160164636
    Abstract: A receiving circuit for a digital television is provided. The receiving circuit of the digital television, adapted to process a digital television signal to generate transmission data, includes: a front-end circuit, configured to process the digital television signal to generate an interleaved signal; a setting unit, configured to provide a setting value associated with a digital video standard of the digital television signal; a frequency de-interleaving and time de-interleaving circuit, configured to select a frequency de-interleaving scheme and a time de-interleaving scheme corresponding to different digital video standards according to the setting value, and to process the interleaved signal to generate a de-interleaved signal; a quadrature amplitude modulation (QAM) demapping circuit, configured to demap the de-interleaved signal to generate a demapped signal; and a decoder, configured to decode the demapped signal to generate the transmission data.
    Type: Application
    Filed: February 18, 2015
    Publication date: June 9, 2016
    Inventors: Chun-Chieh Wang, Tai-Lai Tung, Ko-Yin Lai, Yi-Ying Liao
  • Patent number: 9203677
    Abstract: A signal processing apparatus for receiving a spectral line of an original signal includes a starting point determining module, a searching module and a symbol rate determining module. The starting point determining module finds a maximum energy in the spectral line and determines at least one search starting point according to the maximum energy. From the at least one search starting point, the searching module searches along the spectral line towards a region with a lower energy for at least one minimum energy satisfying a predetermined condition. The symbol rate determining module determines a symbol rate of the original signal according to the at least one minimum energy.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: December 1, 2015
    Assignee: MStar Semiconductor, Inc.
    Inventors: Chu-Hsin Chang, Kai-Wen Cheng, Yi-Ying Liao, Tung-Sheng Lin, Tai-Lai Tung
  • Patent number: 9160591
    Abstract: A signal processing method includes: converting an analog signal to a digital signal; converting the digital signal from a time domain to a frequency domain, the frequency-domain digital signal including a plurality of sets of data exhibiting a predetermined order associated with frequencies respectively corresponding to the data; performing a correlation operation according to the data and the predetermined order to generate a forward correlation result; performing the correlation operation according to the data and a reverse order of the predetermined order to generate a reverse correlation result; selectively generating a control signal according to the forward and reverse correlation results; and processing the digital signal in the time domain according to the control signal so that the data generated in the subsequent step of converting the digital signal from the time domain to the frequency domain exhibit the predetermined order or the reverse order.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: October 13, 2015
    Assignee: MStar Semiconductor, Inc.
    Inventors: Fong-Shih Wei, Yi-Ying Liao, Ko-Yin Lai, Tai-Lai Tung
  • Patent number: 9131198
    Abstract: A signal processing apparatus includes an initial detecting module, a mixer, a symbol rate detecting module, a judging module and a correcting module. The initial detecting module determines an initial carrier frequency offset of an input signal according to a spectrum of the input signal. The mixer adjusts the input signal according to the initial carrier frequency offset to generate a frequency-compensated signal. The symbol rate detecting module determines a symbol rate of the input signal. The judging module judges whether the initial carrier frequency offset is correct according to the frequency-compensated signal. When a judgment result of the judging module is negative, the correcting module determines a corrected carrier frequency offset according to the symbol rate and the spectrum.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: September 8, 2015
    Assignee: MStar Semiconductor, Inc.
    Inventors: Chu-Hsin Chang, Kai-Wen Cheng, Yi-Ying Liao, Tung-Sheng Lin, Tai-Lai Tung
  • Patent number: 9054932
    Abstract: A wireless reception system includes a reception module, a preliminary estimation module, an equalization module and a selection module. The reception module receives a reference signal and at least one input signal transmitted via a multipath environment. The reference signal is associated with a known signal unaffected by the multipath environment. The preliminary estimation module generates a plurality of candidate channel effects according to the at least one input signal. The equalization module performs equalization on the reference signal according to the candidate channel effects to generate a plurality of equalization results. From the equalization results, the selection module selects an optimal equalization result that is most similar to the known signal, and selects the candidate channel effect corresponding to the optimal equalization result to represent the multipath environment.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: June 9, 2015
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Fong-Shih Wei, Yi-Ying Liao
  • Patent number: 9025674
    Abstract: An apparatus for reconstructing digital video data stream reconstructs a transport stream from a first data stream and a second data stream. Both of the first data stream and the second data stream comprise a plurality of packets, a plurality of input stream time reference (ISCR) values, and a plurality of deleted null packet (DNP) values. The apparatus includes a packet interval detector, that estimates a packet interval according to the first data stream or the second data stream; an alignment unit, that generates an alignment signal according to the ISCR values and the packet interval; an oscillator, coupled to the packet interval detector, that generates an output pulse signal; and a reconstruction controller, that reconstructs the transport stream from the first data stream and the second data stream and outputs the transport stream according to the alignment signal and the output pulse signal.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: May 5, 2015
    Assignee: MStar Semiconductor, Inc.
    Inventors: Yi-Ying Liao, Chien-Jen Hung, Tai-Lai Tung
  • Publication number: 20150110208
    Abstract: A signal processing method includes: converting an analog signal to a digital signal; converting the digital signal from a time domain to a frequency domain, the frequency-domain digital signal including a plurality of sets of data exhibiting a predetermined order associated with frequencies respectively corresponding to the data; performing a correlation operation according to the data and the predetermined order to generate a forward correlation result; performing the correlation operation according to the data and a reverse order of the predetermined order to generate a reverse correlation result; selectively generating a control signal according to the forward and reverse correlation results; and processing the digital signal in the time domain according to the control signal so that the data generated in the subsequent step of converting the digital signal from the time domain to the frequency domain exhibit the predetermined order or the reverse order.
    Type: Application
    Filed: October 17, 2014
    Publication date: April 23, 2015
    Inventors: Fong-Shih Wei, Yi-Ying Liao, Ko-Yin Lai, Tai-Lai Tung
  • Patent number: 8931017
    Abstract: A channel scanning method for Digital Video Broadcasting-Satellite (DVB-S) signals is provided. The method includes: scanning a radio frequency (RF) signal according to a normal frequency step; when the Nth channel is detected, obtaining a difference between a low boundary of an Nth channel and a high boundary of an (N?1)th channel; and, when the difference is within a predetermined bandwidth range, scanning the RF signal between the high boundary of the (N?1)th channel and the low boundary of the Nth channel according to a narrow frequency step. The normal frequency step is greater than the narrow frequency step.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: January 6, 2015
    Assignee: MStar Semiconductor, Inc.
    Inventors: Chu-Hsin Chang, Kai-Wen Cheng, Yi-Ying Liao, Tung-Sheng Lin, Tai-Lai Tung
  • Patent number: 8931026
    Abstract: An apparatus for detecting spectrum inversion includes a different correlator and a determining module. The differential correlator performs an odd-order differential correlation on an input signal and a known signal to generate a differential correlation result. When the input signal is determined as corresponding to a target signal of the known signal, the determining module detects spectrum inversion in the input signal according to the phase of the differential correlation result.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: January 6, 2015
    Assignee: MStar Semiconductor, Inc.
    Inventors: Kai-Wen Cheng, Yi-Ying Liao, Tung-Sheng Lin, Tai-Lai Tung
  • Patent number: 8831079
    Abstract: A symbol rate detection apparatus includes an analog-to-digital converter (ADC), a coarse detection module, a mixer, a down-sampling module, and a fine detection module. The ADC converts an analog input signal to a digital input signal at an original sampling frequency. The coarse detection module estimates a carrier frequency offset and a coarse symbol rate according to the digital input signal. The mixer adjusts the frequency of the digital input signal according to the carrier frequency offset to generate a frequency-compensated signal. The fine detection module determines a fine symbol rate according to the frequency-compensated signal.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: September 9, 2014
    Assignee: Mstar Semiconductor, Inc.
    Inventors: Yi-Ying Liao, Tung-Sheng Lin, Tai-Lai Tung
  • Patent number: 8804877
    Abstract: An apparatus for correcting a phase error is provided. The apparatus includes an error estimating module and a correcting module. The error estimating module receives a phase-shift keying signal, and calculates a phase error according to the phase-shift keying signal, a plurality of known candidate signals and Bayesian estimation. The correcting module corrects the phase-shift keying signal according to the phase error.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: August 12, 2014
    Assignee: MStar Semiconductor, Inc.
    Inventors: Kai-Wen Cheng, Yi-Ying Liao, Tung-Sheng Lin, Tai-Lai Tung