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    METHOD AND DEVICE FOR ENHANCING SOUND QUALITY AND REDUCING CURRENT CONSUMPTION
    1.
    发明公开
    METHOD AND DEVICE FOR ENHANCING SOUND QUALITY AND REDUCING CURRENT CONSUMPTION 审中-公开

    公开(公告)号：EP4459970A1

    公开(公告)日：2024-11-06

    申请号：EP22926210.0

    申请日：2022-12-13

    申请人： Samsung Electronics Co., Ltd

    发明人： KIM, Yangsu ,  KIM, Gangyoul ,  PARK, Youngsoo ,  SONG, Hakhoon ,  LEE, Namwoog ,  JANG, Keunwon ,  CHOI, Hyunmin

    IPC分类号： H04M1/60 ,  G10L21/0364 ,  G10L21/0332 ,  G10L19/02 ,  H04W52/02

    摘要： According to various embodiments disclosed in the present document, an electronic device may: acquire, through an application, a request for performing a call with another electronic device; in response to the acquisition of the request, identify a first sampling rate corresponding to a frequency band supported by the application so as to perform communication with another electronic device; acquire an audio signal through a microphone; identify a frequency band of the audio signal; determine a type of the audio signal on the basis of the frequency band; determine a second sampling rate corresponding to the audio signal on the basis of the type of the audio signal; determine a third sampling rate corresponding to a frequency band for performing a call with another electronic device, on the basis of the first sampling rate and the second sampling rate; determine a clock and a tuning parameter on the basis of the third sampling rate; and tune the audio signal on the basis of the clock and the tuning parameter. Various other embodiments identified through the specification are also possible.

    IMPROVED SUBBAND BLOCK BASED HARMONIC TRANSPOSITION
    3.
    发明公开
    IMPROVED SUBBAND BLOCK BASED HARMONIC TRANSPOSITION 审中-公开

    公开(公告)号：EP4435779A3

    公开(公告)日：2024-10-09

    申请号：EP24193627.7

    申请日：2011-01-05

    申请人： Dolby International AB

    发明人： VILLEMOES, Lars

    IPC分类号： G10L21/04 ,  G10L19/022 ,  G10L25/18 ,  G10L21/038 ,  G10L19/02

    CPC分类号： G10L19/0204 ,  G10L19/022 ,  G10L21/04 ,  G10L21/038 ,  G10L25/18

    摘要： The present document relates to audio source coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR), as well as to digital effect processors, e.g. exciters, where generation of harmonic distortion add brightness to the processed signal, and to time stretchers where a signal duration is prolonged with maintained spectral content. A system and method configured to generate a time stretched and/or frequency transposed signal from an input signal is described. The system comprises an analysis filterbank (101) configured to provide an analysis subband signal from the input signal; wherein the analysis subband signal comprises a plurality of complex valued analysis samples, each having a phase and a magnitude. Furthermore, the system comprises a subband processing unit (102) configured to determine a synthesis subband signal from the analysis subband signal using a subband transposition factor Q and a subband stretch factor S. The subband processing unit (102) performs a block based nonlinear processing wherein the magnitude of samples of the synthesis subband signal are determined from the magnitude of corresponding samples of the analysis subband signal and a predetermined sample of the analysis subband signal. In addition, the system comprises a synthesis filterbank (103) configured to generate the time stretched and/or frequency transposed signal from the synthesis subband signal.

    DECODER USING FORWARD ALIASING CANCELLATION
    10.
    发明公开
    DECODER USING FORWARD ALIASING CANCELLATION 审中-实审

    公开(公告)号：EP4398244A3

    公开(公告)日：2024-07-31

    申请号：EP24167817.6

    申请日：2011-07-07

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    发明人： LECOMTE, Jérémie ,  WARMBOLD, Patrick ,  BAYER, Stefan

    IPC分类号： G10L19/00 ,  G10L19/02 ,  G10L19/04

    CPC分类号： G10L19/005 ,  G10L19/0212 ,  G10L19/20 ,  G10L19/04

    摘要： A codec supporting switching between time-domain aliasing cancellation transform coding mode and time-domain coding mode is made less liable to frame loss by adding a further syntax portion to the frames, depending on which the parser of the decoder may select between a first action of expecting the current frame to comprise, and thus reading forward aliasing cancellation data from the current frame and a second action of not-expecting the current frame to comprise, and thus not reading forward aliasing cancellation data from the current frame. In other words, while a bit of coding efficiency is lost due to the provision of the new syntax portion, it is merely the new syntax portion which provides for the ability to use the codec in case of a communication channel with frame loss. Without the new syntax portion, the decoder would not be capable of decoding any data stream portion after a loss and will crash in trying to resume parsing. Thus, in an error prone environment, the coding efficiency is prevented from vanishing by the introduction of the new syntax portion.