Audio signal of an FM stereo radio receiver by using parametric stereo
    31.
    发明授权
    Audio signal of an FM stereo radio receiver by using parametric stereo 有权
    使用参数立体声的FM立体声收音机的音频信号

    公开(公告)号:US08929558B2

    公开(公告)日:2015-01-06

    申请号:US13394799

    申请日:2010-09-07

    摘要: The invention relates to an apparatus for improving a stereo audio signal of an FM stereo radio receiver. The apparatus comprises a parametric stereo (PS) parameter estimation stage. The parameter estimation stage is configured to determine one or more parametric stereo parameters based on the stereo audio signal in a frequency-variant or frequency-invariant manner. Preferably, these PS parameters are time- and frequency-variant. Moreover, the apparatus comprises an upmix stage. The upmix stage is configured to generate the improved stereo signal based on a first audio signal and the one or more parametric stereo parameters. The first audio signal is obtained from the stereo audio signal, e.g. by a downmix operation in a downmix stage. The PS parameter estimation stage may be part of a PS encoder. The upmix stage may be part of a PS decoder.

    摘要翻译: 本发明涉及一种用于改进FM立体声无线电接收机的立体声音频信号的装置。 该装置包括参数立体声(PS)参数估计级。 参数估计级被配置为基于立体声音频信号以频率变化或频率不变的方式确定一个或多个参数立体声参数。 优选地,这些PS参数是时间和频率变化的。 此外,该装置包括上混级。 上混级被配置为基于第一音频信号和一个或多个参数立体声参数来生成改进的立体声信号。 第一音频信号是从立体声音频信号获得的。 通过下混合阶段的下混合操作。 PS参数估计阶段可以是PS编码器的一部分。 上混级可以是PS解码器的一部分。

    Audio coding using de-correlated signals
    33.
    发明申请
    Audio coding using de-correlated signals 有权
    使用去相关信号的音频编码

    公开(公告)号:US20060165184A1

    公开(公告)日:2006-07-27

    申请号:US11291009

    申请日:2005-11-29

    IPC分类号: H04B14/04

    CPC分类号: H04S5/02 G10L19/008

    摘要: A multi-channel signal having at least three channels can be reconstructed such, that the reconstructed channels are at least partly de-correlated from each other using a downmixed signal derived from an original multi-channel signal and a set of de-correlated signals provided by a de-correlator (101) that derives the set of de-correlated signals from the down-mix signal, wherein the de-correlated signals within the set of de-correlated signals are mutually mostly orthogonal to each other, i.e. an orthogonality relation between channel pairs is satisfied within an orthogonality tolerance range.

    摘要翻译: 可以重建具有至少三个信道的多信道信号,使得使用从原始多信道信号导出的下混合信号和提供的一组去相关信号,使得重构信道彼此至少部分地相互关联 通过去相关器(101),其从所述下混合信号中导出所述一组去相关信号,其中所述解相关信号组内的去相关信号彼此大致正交,即正交关系 在正交公差范围内满足通道对之间。

    Advanced methods for interpolation and parameter signalling
    34.
    发明申请
    Advanced methods for interpolation and parameter signalling 有权
    插值和参数信号的高级方法

    公开(公告)号:US20060136229A1

    公开(公告)日:2006-06-22

    申请号:US11286199

    申请日:2005-11-22

    IPC分类号: G10L21/00

    CPC分类号: G10L19/008

    摘要: A parameter calculator calculates lower resolution parametric information and interpolation information. On a decoder-side, an upmixer is used for generating the output channels. The upmixer uses high resolution parametric information generated by a parameter interpolator using the low resolution parametric information and decoder-side derived interpolation information or encoder-generated interpolation information for selecting one of a plurality of different interpolation characteristics.

    摘要翻译: 参数计算器计算低分辨率参数信息和插值信息。 在解码器侧,上混频器用于产生输出通道。 上混频器使用由参数内插器产生的高分辨率参数信息,其使用低分辨率参数信息和解码器侧导出的内插信息或编码器生成的用于选择多个不同插值特性之一的内插信息。

    Concealment of intermittent mono reception of FM stereo radio receivers
    36.
    发明授权
    Concealment of intermittent mono reception of FM stereo radio receivers 有权
    FM立体声无线电接收机间歇性单声道接收隐藏

    公开(公告)号:US09237400B2

    公开(公告)日:2016-01-12

    申请号:US13816459

    申请日:2011-08-16

    摘要: The present invention relates to audio signal processing. In particular, it relates to a method and system for reliably concealing intermittent mono reception of FM stereo radio receivers. The system comprises a parametric stereo parameter estimation stage configured to determine a first parametric stereo parameter based on a first frame of the received two-channel audio signal. The system further comprises a concealment detection stage configured to determine an energy of a side signal within the first signal frame; determine a number of following successive signal frames during which the energy of the side signal drops from a value above the high threshold to a value below a low threshold; determine that the two-channel audio signal following the first signal frame is a forced mono signal if the number of successive signal frames is below a frame threshold; and determine the parametric stereo parameter based on the first parametric stereo parameter.

    摘要翻译: 本发明涉及音频信号处理。 特别涉及用于可靠地隐藏FM立体声无线电接收机的间歇单声道接收的方法和系统。 该系统包括参数立体声参数估计级,其被配置为基于所接收的双声道音频信号的第一帧来确定第一参数立体声参数。 所述系统还包括隐藏检测级,被配置为确定所述第一信号帧内的侧信号的能量; 确定随后的连续信号帧的数量,在此期间,侧信号的能量从高于高阈值的值下降到低于低阈值的值; 如果连续信号帧的数量低于帧阈值,则确定跟随第一信号帧的双声道音频信号是强制单声道信号; 并根据第一参数立体声参数确定参数立体声参数。

    Reduction of spurious uncorrelation in FM radio noise
    37.
    发明授权
    Reduction of spurious uncorrelation in FM radio noise 有权
    减少FM无线电噪声中的杂散不相关

    公开(公告)号:US09094754B2

    公开(公告)日:2015-07-28

    申请号:US13814920

    申请日:2011-08-16

    摘要: The document relates to audio signal processing, in particular to a system and a corresponding method for improving an audio signal of an FM stereo radio receiver, in this context, one aspect relates to the estimation of noise in a received side signal and the compensation of such noise in parametric stereo parameters. A system for generating a parametric stereo parameter from a two-channel audio signal is described. The two-channel audio signal is presentable as a mid signal and side signal representative of a corresponding left and right audio signal. The system comprises a noise estimation stage configured to determine an impact factor characteristic for the noise of the side signal; and a parametric stereo parameter estimation stage configured to determine the parametric stereo parameter; wherein the determining is based on the two-channel audio signal and the impact factor.

    摘要翻译: 该文献涉及音频信号处理,具体涉及用于改进FM立体声无线电接收机的音频信号的系统和相应的方法,在本文中,一方面涉及接收侧信号中的噪声估计和 这样的噪声参数立体声参数。 描述了一种用于从双声道音频信号产生参数立体声参数的系统。 双声道音频信号可以作为表示相应的左和右音频信号的中间信号和侧面信号呈现。 该系统包括噪声估计级,其被配置为确定侧信号的噪声的影响因子特性; 以及被配置为确定所述参数立体声参数的参数立体声参数估计级; 其中所述确定基于所述双声道音频信号和所述影响因子。

    REDUCTION OF SPURIOUS UNCORRELATION IN FM RADIO NOISE
    38.
    发明申请
    REDUCTION OF SPURIOUS UNCORRELATION IN FM RADIO NOISE 有权
    减少FM无线电噪声中的不寻常的不符合

    公开(公告)号:US20130142339A1

    公开(公告)日:2013-06-06

    申请号:US13814920

    申请日:2011-08-16

    IPC分类号: H04R5/04

    摘要: The document relates to audio signal processing, in particular to a system and a corresponding method for improving an audio signal of an FM stereo radio receiver, in this context, one aspect relates to the estimation of noise in a received side signal and the compensation of such noise in parametric stereo parameters. A system for generating a parametric stereo parameter from a two-channel audio signal is described. The two-channel audio signal is presentable as a mid signal and side signal representative of a corresponding left and right audio signal. The system comprises a noise estimation stage configured to determine an impact factor characteristic for the noise of the side signal; and a parametric stereo parameter estimation stage configured to determine the parametric stereo parameter; wherein the determining is based on the two-channel audio signal and the impact factor.

    摘要翻译: 本文件涉及音频信号处理,具体涉及用于改进FM立体声无线电接收机的音频信号的系统和相应方法,在本上下文中,一个方面涉及接收侧信号中的噪声估计和 这样的噪声参数立体声参数。 描述了一种用于从双声道音频信号产生参数立体声参数的系统。 双声道音频信号可以作为表示相应的左和右音频信号的中间信号和侧面信号呈现。 该系统包括噪声估计级,其被配置为确定侧信号的噪声的影响因子特性; 以及被配置为确定所述参数立体声参数的参数立体声参数估计级; 其中所述确定基于所述双声道音频信号和所述影响因子。

    AUDIO SIGNAL OF AN FM STEREO RADIO RECEIVER BY USING PARAMETRIC STEREO
    39.
    发明申请
    AUDIO SIGNAL OF AN FM STEREO RADIO RECEIVER BY USING PARAMETRIC STEREO 有权
    FM立体声收音机的音频信号使用参数立体声

    公开(公告)号:US20120207307A1

    公开(公告)日:2012-08-16

    申请号:US13394799

    申请日:2010-09-07

    IPC分类号: H04H20/48

    摘要: The invention relates to an apparatus for improving a stereo audio signal of an FM stereo radio receiver. The apparatus comprises a parametric stereo (PS) parameter estimation stage. The parameter estimation stage is configured to determine one or more parametric stereo parameters based on the stereo audio signal in a frequency-variant or frequency-invariant manner. Preferably, these PS parameters are time- and frequency-variant. Moreover, the apparatus comprises an upmix stage. The upmix stage is configured to generate the improved stereo signal based on a first audio signal and the one or more parametric stereo parameters. The first audio signal is obtained from the stereo audio signal, e.g. by a downmix operation in a downmix stage. The PS parameter estimation stage may be part of a PS encoder. The upmix stage may be part of a PS decoder.

    摘要翻译: 本发明涉及一种用于改进FM立体声无线电接收机的立体声音频信号的装置。 该装置包括参数立体声(PS)参数估计级。 参数估计级被配置为基于立体声音频信号以频率变化或频率不变的方式确定一个或多个参数立体声参数。 优选地,这些PS参数是时间和频率变化的。 此外,该装置包括上混级。 上混级被配置为基于第一音频信号和一个或多个参数立体声参数来生成改进的立体声信号。 第一音频信号是从立体声音频信号获得的。 通过下混合阶段的下混合操作。 PS参数估计阶段可以是PS编码器的一部分。 上混级可以是PS解码器的一部分。

    CONCEALMENT OF INTERMITTENT MONO RECEPTION OF FM STEREO RADIO RECEIVERS
    40.
    发明申请
    CONCEALMENT OF INTERMITTENT MONO RECEPTION OF FM STEREO RADIO RECEIVERS 有权
    FM立体声无线电接收机的间接单声道接收

    公开(公告)号:US20130142340A1

    公开(公告)日:2013-06-06

    申请号:US13816459

    申请日:2011-08-16

    IPC分类号: H04R5/00

    摘要: The present invention relates to audio signal processing. In particular, it relates to a method and system for reliably concealing intermittent mono reception of FM stereo radio receivers. The system comprises a parametric stereo parameter estimation stage configured to determine a first parametric stereo parameter based on a first frame of the received two-channel audio signal. The system further comprises a concealment detection stage configured to determine an energy of a side signal within the first signal frame; determine a number of following successive signal frames during which the energy of the side signal drops from a value above the high threshold to a value below a low threshold; determine that the two-channel audio signal following the first signal frame is a forced mono signal if the number of successive signal frames is below a frame threshold; and determine the parametric stereo parameter based on the first parametric stereo parameter.

    摘要翻译: 本发明涉及音频信号处理。 特别涉及用于可靠地隐藏FM立体声无线电接收机的间歇单声道接收的方法和系统。 该系统包括参数立体声参数估计级,其被配置为基于所接收的双声道音频信号的第一帧来确定第一参数立体声参数。 所述系统还包括隐藏检测级,被配置为确定所述第一信号帧内的侧信号的能量; 确定随后的连续信号帧的数量,在此期间,侧信号的能量从高于高阈值的值下降到低于低阈值的值; 如果连续信号帧的数量低于帧阈值,则确定跟随第一信号帧的双声道音频信号是强制单声道信号; 并根据第一参数立体声参数确定参数立体声参数。