-
公开(公告)号：US10950252B2
公开(公告)日：2021-03-16
申请号：US16720497
申请日：2019-12-19
发明人： Jeffrey Riedmiller , Karl J. Roeden , Kristofer Kjoerling , Heiko Purnhagen , Vinay Melkote , Leif Sehlstrom
IPC分类号： G10L19/24 , G10L19/18 , G10L19/008 , G10L19/16
摘要： On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (a) from the bitstream, where 1≤m
-
公开(公告)号：US09881629B2
公开(公告)日：2018-01-30
申请号：US15648733
申请日：2017-07-13
发明人： Jeffrey Riedmiller , Karl J. Roeden , Kristofer Kjoerling , Heiko Purnhagen , Vinay Melkote , Leif Sehlstrom
CPC分类号： G10L19/24 , G10L19/008 , G10L19/167 , G10L19/18
摘要： On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (α) from the bitstream, where 1≦m
-
公开(公告)号：US10388296B2
公开(公告)日：2019-08-20
申请号：US16222975
申请日：2018-12-17
发明人： Jeffrey Riedmiller , Karl J. Roeden , Kristofer Kjoerling , Heiko Purnhagen , Vinay Melkote , Leif Sehlstrom
IPC分类号： G10L19/24 , G10L19/008 , G10L19/16 , G10L19/18
摘要： On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (α) from the bitstream, where 1≤m
-
4.发明申请公开(公告)号：US20180197561A1
公开(公告)日：2018-07-12
申请号：US15914917
申请日：2018-03-07
发明人： Per Hedelin , Arijit Biswas , Michael Schug , Vinay Melkote
IPC分类号： G10L21/0232 , G10L19/032 , G10L19/02 , G10L19/008 , H04B1/66
CPC分类号： G10L21/0232 , G10L19/008 , G10L19/0208 , G10L19/032 , G10L21/034 , G10L25/18 , G10L25/45 , H03G7/007 , H04B1/66
摘要： Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to the substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuating segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.
-
5.发明授权公开(公告)号：US09947335B2
公开(公告)日：2018-04-17
申请号：US14762690
申请日：2014-04-01
发明人： Per Hedelin , Arijit Biswas , Michael Schug , Vinay Melkote
IPC分类号： G10L21/0232 , G10L21/034 , G10L25/18 , G10L25/45 , G10L19/032 , G10L19/008 , G10L19/02 , H04B1/66 , H03G7/00
CPC分类号： G10L21/0232 , G10L19/008 , G10L19/0208 , G10L19/032 , G10L21/034 , G10L25/18 , G10L25/45 , H03G7/007 , H04B1/66
摘要： Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuating segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.
-
公开(公告)号：US11708741B2
公开(公告)日：2023-07-25
申请号：US17201689
申请日：2021-03-15
发明人： Jeffrey Riedmiller , Karl J. Roeden , Kristofer Kjoerling , Heiko Purnhagen , Vinay Melkote , Leif Sehlstrom
IPC分类号： G10L19/24 , G10L19/008 , G10L19/16 , G10L19/18 , E21B33/138 , E21B41/00 , E21B21/00
CPC分类号： E21B33/138 , E21B21/003 , E21B41/00 , G10L19/008 , G10L19/167 , G10L19/18 , G10L19/24
摘要： On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (α) from the bitstream, where 1≤m
-
公开(公告)号：US10522163B2
公开(公告)日：2019-12-31
申请号：US16514533
申请日：2019-07-17
发明人： Jeffrey Riedmiller , Karl J. Roeden , Kristofer Kjoerling , Heiko Purnhagen , Vinay Melkote , Leif Sehlstrom
IPC分类号： G10L19/24 , G10L19/008 , G10L19/16 , G10L19/18
摘要： On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (a) from the bitstream, where 1≤m
-
8.发明授权公开(公告)号：US10373627B2
公开(公告)日：2019-08-06
申请号：US15915405
申请日：2018-03-08
发明人： Per Hedelin , Arijit Biswas , Michael Schug , Vinay Melkote
IPC分类号： G10L19/00 , G10L21/0232 , G10L25/18 , G10L21/034 , H04B1/66 , G10L19/008 , G10L19/02 , G10L19/032 , G10L25/45 , H03G7/00
摘要： Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to the substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuating segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.
-
9.发明授权Method and system for encoding audio data with adaptive low frequency compensation 有权用自适应低频补偿编码音频数据的方法和系统公开(公告)号：US09275649B2
公开(公告)日：2016-03-01
申请号：US14325130
申请日：2014-07-07
IPC分类号： G10L19/00 , G10L19/028 , G10L19/032 , G10L19/26 , G10L19/02
CPC分类号： G10L19/028 , G10L19/0204 , G10L19/032 , G10L19/265
摘要： A method for determining mantissa bit allocation of audio data values of frequency domain audio data to be encoded. The allocation method includes a step of determining masking values for the audio data values, including by performing adaptive low frequency compensation on the audio data of each frequency band of a set of low frequency bands of the audio data. The adaptive low frequency compensation includes steps of: performing tonality detection on the audio data to generate compensation control data indicative of whether each frequency band in the set of low frequency bands has prominent tonal content; and performing low frequency compensation on the audio data in each frequency band in the set of low frequency bands having prominent tonal content as indicated by the compensation control data, but not performing low frequency compensation on the audio data in any other frequency band in the set of low frequency bands.
摘要翻译： 一种用于确定要编码的频域音频数据的音频数据值的尾数位分配的方法。 分配方法包括通过对音频数据的一组低频带的每个频带的音频数据执行自适应低频补偿来确定音频数据值的屏蔽值的步骤。 所述自适应低频补偿包括以下步骤：对所述音频数据执行音调检测，以产生指示所述一组低频带中的每个频带是否具有突出的音调内容的补偿控制数据; 对由该补偿控制数据所表示的具有突出色调内容的低频带组中的每个频带中的音频数据执行低频补偿，而不对该组中的任何其它频带中的音频数据执行低频补偿 的低频带。
-
10.发明授权公开(公告)号：US11423923B2
公开(公告)日：2022-08-23
申请号：US16892180
申请日：2020-06-03
发明人： Per Hedelin , Arijit Biswas , Michael Schug , Vinay Melkote
IPC分类号： G10L19/00 , G10L21/00 , G10L21/0232 , H04B1/66 , G10L25/18 , G10L21/034 , G10L19/008 , G10L19/02 , G10L19/032 , H03G7/00 , G10L25/45
摘要： Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to the substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuating segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.
-
-
-
-
-
-
-
-
-
搜索结果
29 条记录 (耗时 0.026 秒)
