Audio encoder, audio decoder and audio processor having a dynamically variable warping characteristic
    1.
    发明授权
    Audio encoder, audio decoder and audio processor having a dynamically variable warping characteristic 有权
    具有动态可变翘曲特性的音频编码器,音频解码器和音频处理器

    公开(公告)号:US08682652B2

    公开(公告)日:2014-03-25

    申请号:US12305936

    申请日:2007-05-16

    IPC分类号: G10L19/00

    CPC分类号: G10L19/22 G10L19/022

    摘要: An audio encoder, an audio decoder or an audio processor includes a filter for generating a filtered audio signal, the filter having a variable warping characteristic, the characteristic being controllable in response to a time-varying control signal, the control signal indicating a small or no warping characteristic or a comparatively high warping characteristic. Furthermore, a controller is connected for providing the time-varying control signal, which depends on the audio signal. The filtered audio signal can be introduced to an encoding processor having different encoding algorithms, one of which is a coding algorithm adapted to a specific signal pattern. Alternatively, the filter is a post-filter receiving a decoded audio signal.

    摘要翻译: 音频编码器,音频解码器或音频处理器包括用于产生经滤波的音频信号的滤波器,该滤波器具有可变的翘曲特性,该特性可响应于时变控制信号而被控制,该控制信号指示小的或 无翘曲特性或较高翘曲特性。 此外,连接控制器以提供取决于音频信号的时变控制信号。 滤波后的音频信号可以被引入到具有不同编码算法的编码处理器中,其中之一是适用于特定信号模式的编码算法。 或者,滤波器是接收经解码的音频信号的后置滤波器。

    Apparatus and Method for Encoding/Decoding an Audio Signal Using an Aliasing Switch Scheme
    3.
    发明申请
    Apparatus and Method for Encoding/Decoding an Audio Signal Using an Aliasing Switch Scheme 有权
    使用混叠开关方案对音频信号进行编码/解码的装置和方法

    公开(公告)号:US20110173009A1

    公开(公告)日:2011-07-14

    申请号:US13004351

    申请日:2011-01-11

    IPC分类号: G10L19/00

    摘要: An apparatus for encoding an audio signal includes the windower for windowing a first block of the audio signal using an analysis window having an aliasing portion and a further portion. The apparatus furthermore includes a processor for processing the first sub-block of the audio signal associated with the aliasing portion by transforming the sub-block from a domain into a different domain subsequent to windowing the first sub-block to obtain the processed first sub-block, and for processing a second sub-block of the audio signal associated with the further portion by transforming the second sub-block from the domain into the different domain before windowing the second sub-block to obtain a processed second sub-block. The apparatus furthermore includes a transformer for converting the processed first sub-block and the processed second sub-block from the different domain into a further different domain using the same block transform rule to obtain a converted first block which may then be compressed using any of the well-known data compression algorithms. Thus, a critically sampled switch between two coding modes can be obtained, since aliasing portions occurring in two different domains are matched to each other.

    摘要翻译: 用于编码音频信号的装置包括用于使用具有混叠部分和另一部分的分析窗口对音频信号的第一块进行加窗的加窗器。 该装置还包括处理器,用于通过在将第一子块加窗以获得处理的第一子块之后,将子块从域变换为不同的域来处理与混叠部分相关联的音频信号的第一子块, 并且用于通过在开启第二子块之前将第二子块从该域变换为不同的域来处理与另一部分相关联的音频信号的第二子块,以获得经处理的第二子块。 该装置还包括一个变换器,用于使用相同的块变换规则将处理的第一子块和处理的第二子块从不同的域转换成另一个不同的域,以获得转换的第一块,然后可以使用 众所周知的数据压缩算法。 因此,由于发生在两个不同域中的混叠部分彼此匹配,因此可以获得两种编码模式之间的批量采样切换。

    Audio encoder, audio decoder and audio processor having a dynamically variable warping characteristic
    4.
    发明授权
    Audio encoder, audio decoder and audio processor having a dynamically variable warping characteristic 有权
    具有动态可变翘曲特性的音频编码器,音频解码器和音频处理器

    公开(公告)号:US07873511B2

    公开(公告)日:2011-01-18

    申请号:US11428297

    申请日:2006-06-30

    IPC分类号: G10L19/14 G10L19/00 G10L19/02

    CPC分类号: G10L19/22

    摘要: An audio encoder, an audio decoder or an audio processor includes a filter for generating a filtered audio signal, the filter having a variable warping characteristic, the characteristic being controllable in response to a time-varying control signal, the control signal indicating a small or no warping characteristic or a comparatively high warping characteristic. Furthermore, a controller is connected for providing the time-varying control signal, which depends on the audio signal. The filtered audio signal can be introduced to an encoding processor having different encoding algorithms, one of which is a coding algorithm adapted to a specific signal pattern. Alternatively, the filter is a post-filter receiving a decoded audio signal.

    摘要翻译: 音频编码器,音频解码器或音频处理器包括用于产生经滤波的音频信号的滤波器,该滤波器具有可变的翘曲特性,该特性可响应于时变控制信号而被控制,该控制信号指示小的或 无翘曲特性或较高翘曲特性。 此外,连接控制器以提供取决于音频信号的时变控制信号。 滤波后的音频信号可以被引入到具有不同编码算法的编码处理器中,其中之一是适用于特定信号模式的编码算法。 或者,滤波器是接收经解码的音频信号的后置滤波器。

    Audio encoding/decoding with aliasing switch for domain transforming of adjacent sub-blocks before and subsequent to windowing
    6.
    发明授权
    Audio encoding/decoding with aliasing switch for domain transforming of adjacent sub-blocks before and subsequent to windowing 有权
    使用混叠开关进行音频编码/解码,用于在开窗之前和之后对相邻子块进行域变换

    公开(公告)号:US08862480B2

    公开(公告)日:2014-10-14

    申请号:US13004351

    申请日:2011-01-11

    摘要: An apparatus for encoding an audio signal includes the windower for windowing a first block of the audio signal using an analysis window having an aliasing portion and a further portion. The apparatus furthermore includes a processor for processing the first sub-block of the audio signal associated with the aliasing portion by transforming the sub-block from a domain into a different domain subsequent to windowing the first sub-block to obtain the processed first sub-block, and for processing a second sub-block of the audio signal associated with the further portion by transforming the second sub-block from the domain into the different domain before windowing the second sub-block to obtain a processed second sub-block. Thus, a critically sampled switch between two coding modes can be obtained.

    摘要翻译: 用于编码音频信号的装置包括用于使用具有混叠部分和另一部分的分析窗口对音频信号的第一块进行加窗的加窗器。 该装置还包括处理器,用于通过在将第一子块加窗以获得处理的第一子块之后,将子块从域变换为不同的域来处理与混叠部分相关联的音频信号的第一子块, 并且用于通过在开启第二子块之前将第二子块从该域变换为不同的域来处理与另一部分相关联的音频信号的第二子块,以获得经处理的第二子块。 因此,可以获得两种编码模式之间的批量采样开关。

    Noise Filler, Noise Filling Parameter Calculator Encoded Audio Signal Representation, Methods and Computer Program
    7.
    发明申请
    Noise Filler, Noise Filling Parameter Calculator Encoded Audio Signal Representation, Methods and Computer Program 有权
    噪声填充,噪声填充参数计算器编码音频信号表示,方法和计算机程序

    公开(公告)号:US20110173012A1

    公开(公告)日:2011-07-14

    申请号:US13004493

    申请日:2011-01-11

    IPC分类号: G10L19/00

    摘要: A noise filler for providing a noise-filled spectral representation of an audio signal on the basis of an input spectral representation of the audio signal has a spectral region identifier configured to identify spectral regions of the input spectral representation spaced from non-zero spectral regions of the input spectral representation by at least one intermediate spectral region, to obtain identified spectral regions, and a noise inserter configured to selectively introduce noise into the identified spectral regions to obtain the noise-filled spectral representation of the audio signal. A noise filling parameter calculator for providing a noise filling parameter on the basis of a quantized spectral representation of an audio signal has a spectral region identifier, as mentioned above, and a noise value calculator configured to selectively consider quantization errors of the identified spectral regions for a calculation of the noise filling parameter. Accordingly, an encoded audio signal representation representing the audio signal can be obtained.

    摘要翻译: 用于基于音频信号的输入频谱表示来提供音频信号的噪声填充频谱表示的噪声填充器具有频谱区域标识符,其被配置为识别从非零频谱区域间隔开的输入频谱表示的频谱区域 通过至少一个中间光谱区域的输入光谱表示,以获得所识别的光谱区域,以及噪声插入器,被配置为选择性地将噪声引入所识别的光谱区域中,以获得音频信号的噪声填充的频谱表示。 用于根据音频信号的量化频谱表示提供噪声填充参数的噪声填充参数计算器具有如上所述的频谱区域标识符,以及噪声值计算器,被配置为选择性地考虑所识别的频谱区域的量化误差 噪声填充参数的计算。 因此,可以获得表示音频信号的编码音频信号表示。

    Predictive coding scheme with adaptive speed parameters
    8.
    发明授权
    Predictive coding scheme with adaptive speed parameters 有权
    具有自适应速度参数的预测编码方案

    公开(公告)号:US07386446B2

    公开(公告)日:2008-06-10

    申请号:US11462140

    申请日:2006-08-03

    IPC分类号: G10L19/04 H03M7/38

    摘要: If an adaptive prediction algorithm controllable by a speed coefficient is started from to operate with a first adaption speed and a first adaption precision and an accompanying first prediction precision in the case that the speed coefficient has a first value and to operate with a second, compared to the first one, lower adaption speed and a second, but compared to the first one, higher precision in the case that the speed parameter has a second value, the adaption durations occurring after the reset times where the prediction errors are at first increased due to the, not yet, adapted prediction coefficients may be decreased by at first setting the speed parameter to the first value and, after a while, to a second value. After the speed parameter has again been set to the second value after a predetermined duration after the reset times, the prediction errors and thus the residuals to be transmitted are more optimized or smaller than would be possible with the first speed parameter value.

    摘要翻译: 如果在速度系数具有第一值的情况下开始从速度系数控制的自适应预测算法以第一适应速度和第一适应精度以及伴随的第一预测精度进行操作,则比较 对于第一个,较低的适应速度和一秒,但是与第一个相比,在速度参数具有第二值的情况下更高的精度,在预测误差首先增加的复位时间之后出现的适应持续时间最初增加 通过首先将速度参数设定为第一值,并且在一段时间之后,还可以减小适应预测系数,而不是适应预测系数。 在复位时间之后的预定持续时间之后再次将速度参数设置为第二值之后,预测误差以及因此将被发送的残差比第一速度参数值更可能优化或更小。