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    ENCODING AND DECODING OF DIGITAL AUDIO SIGNALS USING VARIABLE ALPHABET SIZE
    1.
    发明申请
    ENCODING AND DECODING OF DIGITAL AUDIO SIGNALS USING VARIABLE ALPHABET SIZE 审中-公开

    公开(公告)号：US20180308497A1

    公开(公告)日：2018-10-25

    申请号：US15926089

    申请日：2018-03-20

    申请人： DTS, Inc.

    发明人： Albert Chau ,  Antonius Kalker ,  Gadiel Seroussi

    IPC分类号： G10L19/008 ,  G10L19/022 ,  G10L25/18

    摘要： An audio encoder can parse a digital audio signal into a plurality of frames, each frame including a specified number of audio samples, perform a transform of the audio samples of each frame to produce a plurality of frequency-domain coefficients for each frame, partition the plurality of frequency-domain coefficients for each frame into a plurality of bands for each frame, each band having a reshaping parameter that represents a time resolution and a frequency resolution, and encode the digital audio signal to a bit stream that includes the reshaping parameters. For a first band, the reshaping parameter can be encoded using a first alphabet size. For a second band, the reshaping parameter can be encoded using a second alphabet size different from the first alphabet size. Using different alphabet sizes can allow for more compact compression in the bit stream.

    Audio coder window sizes and time-frequency transformations
    3.
    发明授权
    Audio coder window sizes and time-frequency transformations 有权

    公开(公告)号：US10818305B2

    公开(公告)日：2020-10-27

    申请号：US15967119

    申请日：2018-04-30

    申请人： DTS, Inc.

    发明人： Michael M. Goodwin ,  Antonius Kalker ,  Albert Chau

    IPC分类号： G10L19/022 ,  G10L19/008 ,  G10L19/26 ,  G10L25/18 ,  G10L25/45 ,  G10L19/02 ,  G10L19/22

    摘要： A method of encoding an audio signal is provided comprising: applying multiple different time-frequency transformations to an audio signal frame; computing measures of coding efficiency across multiple frequency bands for multiple time-frequency resolutions; selecting a combination of time-frequency resolutions to represent the frame at each of the multiple frequency bands based at least in part upon the computed measures of coding efficiency; determining a window size and a corresponding transform size; determining a modification transformation; windowing the frame using the determined window size; transforming the windowed frame using the determined transform size; modifying a time-frequency resolution within a frequency band of the transform of the windowed frame using the determined modification transformation.

    AUDIO CODER WINDOW AND TRANSFORM IMPLEMENTATIONS
    4.
    发明申请
    AUDIO CODER WINDOW AND TRANSFORM IMPLEMENTATIONS 有权

    公开(公告)号：US20210134309A1

    公开(公告)日：2021-05-06

    申请号：US17097690

    申请日：2020-11-13

    申请人： DTS, Inc.

    发明人： Michael M. Goodwin ,  Antonius Kalker ,  Albert Chau

    IPC分类号： G10L19/02 ,  G10L19/022 ,  G10L25/45 ,  G10L19/26

    摘要： An audio signal encoding method is provided comprising: receiving first and second audio signal frames; processing a second portion of the first audio signal frame and a first portion of the second audio signal frame using an orthogonal transformation to determine in part a first intermediate encoding result; and processing the first intermediate encoding result using an orthogonal transformation to determine a set of spectral coefficients that corresponds to at least a portion of the first audio signal frame.

    AUDIO CODER WINDOW SIZES AND TIME-FREQUENCY TRANSFORMATIONS
    5.
    发明申请
    AUDIO CODER WINDOW SIZES AND TIME-FREQUENCY TRANSFORMATIONS 有权

    公开(公告)号：US20210043218A1

    公开(公告)日：2021-02-11

    申请号：US17080548

    申请日：2020-10-26

    申请人： DTS, Inc.

    发明人： Michael M. Goodwin ,  Antonius Kalker ,  Albert Chau

    IPC分类号： G10L19/022 ,  G10L19/26 ,  G10L25/45 ,  G10L19/008 ,  G10L25/18 ,  G10L19/22 ,  G10L19/02

    摘要： A method of encoding an audio signal is provided comprising: applying multiple different time-frequency transformations to an audio signal frame; computing measures of coding efficiency across multiple frequency bands for multiple time-frequency resolutions; selecting a combination of time-frequency resolutions to represent the frame at each of the multiple frequency bands based at least in part upon the computed measures of coding efficiency; determining a window size and a corresponding transform size; determining a modification transformation; windowing the frame using the determined window size; transforming the windowed frame using the determined transform size; modifying a time-frequency resolution within a frequency band of the transform of the windowed frame using the determined modification transformation.

    Encoding and decoding of digital audio signals using variable alphabet size
    6.
    发明授权
    Encoding and decoding of digital audio signals using variable alphabet size 有权

    公开(公告)号：US10699723B2

    公开(公告)日：2020-06-30

    申请号：US15926089

    申请日：2018-03-20

    申请人： DTS, Inc.

    发明人： Albert Chau ,  Antonius Kalker ,  Gadiel Seroussi

    IPC分类号： G10L19/008 ,  G10L19/022 ,  G10L25/18

    摘要： An audio encoder can parse a digital audio signal into a plurality of frames, each frame including a specified number of audio samples, perform a transform of the audio samples of each frame to produce a plurality of frequency-domain coefficients for each frame, partition the plurality of frequency-domain coefficients for each frame into a plurality of bands for each frame, each band having a reshaping parameter that represents a time resolution and a frequency resolution, and encode the digital audio signal to a bit stream that includes the reshaping parameters. For a first band, the reshaping parameter can be encoded using a first alphabet size. For a second band, the reshaping parameter can be encoded using a second alphabet size different from the first alphabet size. Using different alphabet sizes can allow for more compact compression in the bit stream.