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    HIGH BAND EXCITATION SIGNAL GENERATION
    52.
    发明专利
    HIGH BAND EXCITATION SIGNAL GENERATION 未知

    公开(公告)号：ZA201607459B

    公开(公告)日：2018-11-28

    申请号：ZA201607459

    申请日：2016-10-28

    Applicant: QUALCOMM INC

    Inventor： RAJENDRAN VIVEK ,  VILLETTE STEPHANE PIERRE ,  SINDER DANIEL J ,  RAMADAS PRAVIN KUMAR

    Abstract: A method includes extracting a voicing classification parameter of an audio signal and determining a filter coefficient of a low pass filter based on the voicing classification parameter. The method also includes filtering a low-band portion of the audio signal to generate a low-band audio signal and controlling an amplitude of a temporal envelope of the low-band audio signal based on the filter coefficient. The method also includes modulating a white noise signal based on the amplitude of the temporal envelope to generate a modulated white noise signal and scaling the modulated white noise signal based on a noise gain to generate a scaled modulated white noise signal. The method also includes mixing a scaled version of the low-band audio signal with the scaled modulated white noise signal to generate a high-band excitation signal that is used to generate a decoded version of the audio signal.

    SYSTEM AND METHOD OF REDUNDANCY BASED PACKET TRANSMISSION ERROR RECOVERY
    53.
    发明专利
    SYSTEM AND METHOD OF REDUNDANCY BASED PACKET TRANSMISSION ERROR RECOVERY 未知

    公开(公告)号：CA2953635C

    公开(公告)日：2018-10-30

    申请号：CA2953635

    申请日：2015-07-27

    Applicant: QUALCOMM INC

    Inventor： KRISHNAN VENKATESH ,  RAJENDRAN VIVEK ,  SARKAR SANDIP ,  SUBASINGHA SUBASINGHA SHAMINDA ,  ATTI VENKATRAMAN S

    IPC: H04L1/18 ,  H04L1/00

    Abstract: A device includes a receiver, a buffer, and an analyzer. The receiver is configured to receive packets that correspond to at least a subset of a sequence of packets and that include error correction data. The error correction data of a first packet of the packets includes a partial copy of a second packet. The buffer is configured to store the packets. The analyzer is configured to determine whether a first particular packet of the sequence is missing from the buffer, to determine whether a partial copy of the first particular packet is stored in the buffer as error correction data in a second particular packet, to update a value based at least in part on whether the first particular packet is missing from the buffer and the partial copy of the first particular packet is stored in the buffer, and to adjust an error recovery parameter based at least in part on the value.

    SYSTEMS AND METHODS OF PERFORMING FILTERING FOR GAIN DETERMINATION
    54.
    发明专利
    SYSTEMS AND METHODS OF PERFORMING FILTERING FOR GAIN DETERMINATION 未知

    公开(公告)号：ZA201506577B

    公开(公告)日：2018-08-29

    申请号：ZA201506577

    申请日：2015-09-07

    Applicant: QUALCOMM INC

    Inventor： ATTI VENKATRAMAN SRINIVASA ,  KRISHNAN VENKATESH ,  RAJENDRAN VIVEK ,  VILLETTE STEPHANE PIERRE

    Abstract: A particular method includes determining, based on spectral information corresponding to an audio signal that includes a low-band portion and a high-band portion, that the audio signal includes a component corresponding to an artifact-generating condition. The method also includes filtering the high-band portion of the audio signal and generating an encoded signal. Generating the encoded signal includes determining gain information based on a ratio of a first energy corresponding to filtered high-band output to a second energy corresponding to the low-band portion to reduce an audible effect of the artifact-generating condition.

    СИСТЕМИ ТА СПОСОБИ ВИКОНАННЯ ФІЛЬТРАЦІЇ ДЛЯ ВИЗНАЧЕННЯ ПОСИЛЕННЯ
    57.
    发明专利
    СИСТЕМИ ТА СПОСОБИ ВИКОНАННЯ ФІЛЬТРАЦІЇ ДЛЯ ВИЗНАЧЕННЯ ПОСИЛЕННЯ 未知

    公开(公告)号：UA116371C2

    公开(公告)日：2018-03-12

    申请号：UAA201508656

    申请日：2013-08-06

    Applicant: QUALCOMM INC

    Inventor： ATTI VENKATRAMAN SRINIVASA ,  KRISHNAN VENKATESH ,  RAJENDRAN VIVEK ,  VILLETTE STEPHANE PIERRE

    IPC: G10L19/07 ,  G10L21/0208 ,  G10L19/24 ,  G10L21/0216 ,  G10L21/0388

    Abstract: Данийспосібвключаєв себевизначення, наосновіспектральноїінформації, щовідповідаєаудіосигналу, якийвключаєв себечастинусмугинизькихчастоті частинусмугивисокихчастот, того, щоаудіосигналвключаєв себекомпонент, якийвідповідаєумовіформуванняартефактів. Спосібтакожвключаєв себефільтраціючастинисмугивисокихчастотаудіосигналуі формуваннякодованогосигналу. Формуваннякодованогосигналувключаєв себевизначенняінформаціїпосиленнянаосновівідношенняпершоїенергії, щовідповідаєфільтрованомувихідномусигналусмугивисокихчастот, додругоїенергії, щовідповідаєчастинісмугинизькихчастот, длятого, щобзменшуватичутнийефектумовиформуванняартефактів.

    SYSTEMS AND METHODS FOR DETERMINING AN INTERPOLATION FACTOR SET
    60.
    发明专利
    SYSTEMS AND METHODS FOR DETERMINING AN INTERPOLATION FACTOR SET 未知

    公开(公告)号：ZA201506959B

    公开(公告)日：2017-07-26

    申请号：ZA201506959

    申请日：2015-09-18

    Applicant: QUALCOMM INC

    Inventor： KRISHNAN VENKATESH ,  SUBASINGHA SUBASINGHA SHAMINDA ,  RAJENDRAN VIVEK

    Abstract: A method for determining an interpolation factor set by an electronic device is described. The method includes determining a value based on a current frame property and a previous frame property. The method also includes determining whether the value is outside of a range. The method further includes determining an interpolation factor set based on the value and a prediction mode indicator if the value is outside of the range. The method additionally includes synthesizing a speech signal.

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