Apparatus and a method for decoding an encoded audio signal
    1.
    发明授权
    Apparatus and a method for decoding an encoded audio signal 有权
    用于解码编码音频信号的装置和方法

    公开(公告)号:US08275626B2

    公开(公告)日:2012-09-25

    申请号:US13004272

    申请日:2011-01-11

    IPC分类号: G10L19/00

    摘要: An apparatus for decoding an encoded audio signal having first and second portions encoded in accordance with first and second encoding algorithms, respectively, BWE parameters for the first and second portions and a coding mode information indicating a first or a second decoding algorithm, includes first and second decoders, a BWE module and a controller. The decoders decode portions in accordance with decoding algorithms for time portions of the encoded signal to obtain decoded signals. The BWE module has a controllable crossover frequency and is configured for performing a bandwidth extension algorithm using the first decoded signal and the BWE parameters for the first portion, and for performing a bandwidth extension algorithm using the second decoded signal and the bandwidth extension parameter for the second portion. The controller controls the crossover frequency for the BWE module in accordance with the coding mode information.

    摘要翻译: 一种用于解码具有根据第一和第二编码算法编码的第一和第二部分的编码音频信号的装置,分别用于第一和第二部分的BWE参数和指示第一或第二解码算法的编码模式信息包括第一和第二编码算法 第二解码器,BWE模块和控制器。 解码器根据编码信号的时间部分的解码算法来解码部分,以获得解码信号。 BWE模块具有可控的交叉频率,并且被配置为使用第一解码信号和第一部分的BWE参数来执行带宽扩展算法,并且用于使用第二解码信号和带宽扩展参数来执行带宽扩展算法 第二部分。 控制器根据编码模式信息控制BWE模块的交叉频率。

    Method for creating a representation of a calculation result linearly dependent upon a square of a value
    2.
    发明授权
    Method for creating a representation of a calculation result linearly dependent upon a square of a value 有权
    用于根据值的平方线性地创建计算结果的表示的方法

    公开(公告)号:US08037114B2

    公开(公告)日:2011-10-11

    申请号:US11762690

    申请日:2007-06-13

    IPC分类号: G06F15/00

    摘要: In the transition into the logarithmic range, not the entire bit width of the result linearly dependent upon the square of the value must be considered. Rather, it is possible to scale the result of a value with x bits such that a representation with less than x bits of the result is sufficient to receive the logarithmic representation based thereon. The effect of the scaling factor on the resulting logarithmic representation may be compensated for by adding or subtracting a correction value received by the logarithm function applied to the scaling factor to or from the scaled logarithmic representation without any loss of dynamics. This way, a method and an apparatus for creating a representation of a result linearly dependent upon a square of a value are provided so that the calculation is simple and/or possible with little hardware expenditure.

    摘要翻译: 在向对数范围的转换中,必须考虑线性依赖于该值平方的结果的整数位宽度。 相反,可以用x比特来缩放值的结果,使得具有小于x位的结果的表示足以基于此来接收对数表示。 缩放因子对所得到的对数表示的影响可以通过将由应用于比例因子的对数函数接收的校正值加到或从缩放的对数表示中减去而没有任何动态损失来补偿。 这样,提供了一种用于创建线性表示的方法和装置,该结果线性地取决于值的平方,使得在少量硬件消耗的情况下计算是简单的和/或可能的。

    Apparatus and Method for Generating a Bandwidth Extended Signal
    7.
    发明申请
    Apparatus and Method for Generating a Bandwidth Extended Signal 有权
    用于产生带宽扩展信号的装置和方法

    公开(公告)号:US20110216918A1

    公开(公告)日:2011-09-08

    申请号:US13004314

    申请日:2011-01-11

    IPC分类号: H03G5/00

    CPC分类号: G10L21/038

    摘要: An apparatus for generating a bandwidth extended signal from an input signal includes a patch generator and a combiner. The input signal is represented for first and second bands by first and second resolution data, respectively, the second resolution being lower than the first. The patch generator generates first and second patches from the first band of the input signal according to first and second patching algorithms, respectively. A spectral density of the second patch generated using the second patching algorithm is higher than a spectral density of a first patch generated using the first patching algorithm. The combiner combines both patches and the first band of the input signal to obtain the bandwidth extended signal. The apparatus scales the input signal according to the first and second patching algorithms or scales the first and second patches, so that the bandwidth extended signal fulfills a spectral envelope criterion.

    摘要翻译: 一种用于从输入信号产生带宽扩展信号的装置包括补丁发生器和组合器。 输入信号分别由第一和第二分辨率数据表示为第一和第二频带,第二分辨率低于第一分辨率数据。 贴片发生器分别根据第一和第二修补算法从输入信号的第一频带产生第一和第二贴片。 使用第二修补算法生成的第二贴片的频谱密度高于使用第一修补算法生成的第一贴片的频谱密度。 组合器将输入信号的两个补丁和第一个频带组合起来,以获得带宽扩展信号。 该装置根据第一和第二修补算法对输入信号进行缩放或缩放第一和第二贴片,使得带宽扩展信号满足频谱包络准则。

    Apparatus and method for generating a bandwidth extended signal
    10.
    发明授权
    Apparatus and method for generating a bandwidth extended signal 有权
    用于产生带宽扩展信号的装置和方法

    公开(公告)号:US08880410B2

    公开(公告)日:2014-11-04

    申请号:US13004314

    申请日:2011-01-11

    IPC分类号: G10L19/00 G10L21/038

    CPC分类号: G10L21/038

    摘要: An apparatus for generating a bandwidth extended signal from an input signal includes a patch generator and a combiner. The input signal is represented for first and second bands by first and second resolution data, respectively, the second resolution being lower than the first. The patch generator generates first and second patches from the first band of the input signal according to first and second patching algorithms, respectively. A spectral density of the second patch generated using the second patching algorithm is higher than a spectral density of a first patch generated using the first patching algorithm. The combiner combines both patches and the first band of the input signal to obtain the bandwidth extended signal. The apparatus scales the input signal according to the first and second patching algorithms or scales the first and second patches, so that the bandwidth extended signal fulfills a spectral envelope criterion.

    摘要翻译: 一种用于从输入信号产生带宽扩展信号的装置包括补丁发生器和组合器。 输入信号分别由第一和第二分辨率数据表示为第一和第二频带,第二分辨率低于第一分辨率数据。 贴片发生器分别根据第一和第二修补算法从输入信号的第一频带产生第一和第二贴片。 使用第二修补算法生成的第二贴片的频谱密度高于使用第一修补算法生成的第一贴片的频谱密度。 组合器将输入信号的两个补丁和第一个频带组合起来,以获得带宽扩展信号。 该装置根据第一和第二修补算法对输入信号进行缩放或缩放第一和第二贴片,使得带宽扩展信号满足频谱包络准则。