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    • 55. 发明授权
    • Digital encoding process
    • 数字编码过程
    • US5579430A
    • 1996-11-26
    • US380135
    • 1995-01-26
    • Bernhard GrillKarl-Heinz BrandenburgThomas SporerBernd KurtenErnst Eberlein
    • Bernhard GrillKarl-Heinz BrandenburgThomas SporerBernd KurtenErnst Eberlein
    • H03M7/40H03M7/30H03M7/42H04J3/16G01L3/02G01L9/00
    • H03M7/3053H03M7/42
    • A digital encoding process for transmitting and/or storing acoustical sigs and, in particular, music signals, in which scanned values of the acoustical signal are transformed by means of a transformation or a filter bank into a sequence of second scanned values, which reproduce the spectral composition of the acoustical signal, and the sequence of second scanned values is quantized in accordance with the requirements with varying precision and is partially or entirely encoded by an optimum encoder, and in which a corresponding decoding and inverse transformation takes place during the reproduction. An encoder is utilized in a manner in which the occurrence probability of the quantized spectral coefficient is correlated to the length of the code in such a way that the more frequently the spectral coefficient occurs, the shorter the code word. A code word and, if needed, a supplementary code is allocated to several elements of the sequence or to a value range in order to reduce the size of the table of the encoder. A portion of the code words of variable length are arranged in a raster, and the remaining code words are distributed in the gaps still left so that the beginning of a code word can be more easily found without completely decoding or in the event of faulty transmission.
    • 用于发送和/或存储声信号,特别是音乐信号的数字编码过程,其中声信号的扫描值通过变换或滤波器组变换为第二扫描值的序列,其再现 声信号的频谱组成和第二扫描值的序列根据要求具有不同的精度量化,并被最佳编码器部分或全部编码,并且其中在再现期间进行相应的解码和逆变换。 使用编码器,其中量化频谱系数的出现概率与代码的长度相关联,使得频谱系数发生频率越高,码字越短。 如果需要,代码字和补充代码被分配给序列的多个元素或值范围,以便减小编码器的表的大小。 可变长度的码字的一部分被布置在光栅中,并且剩余的码字分布在仍然留下的间隙中,使得可以在没有完全解码的情况下或在发生错误传输的情况下更容易地找到码字的开始 。
    • 59. 发明申请
    • APPARATUS AND METHOD FOR DETERMINING A QUANTIZER STEP SIZE
    • 用于确定量子步长大小的装置和方法
    • US20090274210A1
    • 2009-11-05
    • US12496880
    • 2009-07-02
    • Bernhard GrillMichael SchugBodo TeichmannNikolaus Rettelbach
    • Bernhard GrillMichael SchugBodo TeichmannNikolaus Rettelbach
    • H04N7/26G10L19/02
    • G10L19/032G10L2019/0005
    • For determining a quantizer step size for quantizing a signal including audio or video information, a first quantizer step size as well as an interference threshold are provided. Then, the actual interference introduced by the first quantizer step size is determined and compared with the interference threshold. Despite the fact that the comparison reveals that the actually introduced interference exceeds the threshold, a second, coarser quantizer step size is nevertheless used, which will then be used for quantization if it turns out that the interference introduced by the coarser, second quantizer step size falls below the threshold or falls below the interference introduced by the first quantizer step size. Thus, the quantization interference is reduced while the quantization is coarsened and, thus, the compression gain is increased.
    • 为了确定用于量化包括音频或视频信息的信号的量化器步长,提供第一量化器步长以及干扰阈值。 然后,确定由第一量化器步长引入的实际干扰并将其与干扰阈值进行比较。 尽管比较显示实际引入的干扰超过阈值,但是仍然使用第二较粗略的量化器步长,然后将其用于量化,如果证明由较粗的第二量化器步长引入的干扰 低于阈值或低于由第一量化器步长引入的干扰。 因此,量化干扰减小,而量化粗大,因此压缩增益增加。
    • 60. 发明授权
    • Method and device for detecting a transient in a discrete-time audio signal
    • 用于检测离散时间音频信号中的瞬变的方法和装置
    • US06826525B2
    • 2004-11-30
    • US10183139
    • 2002-06-25
    • Johannes HilpertJürgen HerreBernhard GrillRainer BuchtaKarlheinz BrandenburgHeinz Gerhäuser
    • Johannes HilpertJürgen HerreBernhard GrillRainer BuchtaKarlheinz BrandenburgHeinz Gerhäuser
    • G10L1900
    • H04B1/665
    • A method for detecting a transient in a discrete-time audio signal is performed completely in the time domain and includes the step of segmenting the discrete-time audio signal so as to generate consecutive segments of the same length with unfiltered discrete-time audio signals xs(T−1). The discrete-time audio signal in a current segment is subsequently filtered. Then either the energy of the filtered discrete-time audio signal in the current segment can be compared with the energy of the filtered discrete-time audio signal in a preceding segment or a current relationship between the energy of the filtered discrete-time audio signal in the current segment and the energy of the unfiltered discrete-time audio signal in the current segment can be formed and this current relationship compared with a preceding corresponding relationship. On the basis of the one and/or the other of these comparisons it is detected whether a transient is present in the discrete-time audio signal.
    • 用于检测离散时间音频信号中的瞬态的方法在时域中完全执行,并且包括分段离散时间音频信号以便生成具有未滤波的离散时间音频信号xs的相同长度的连续片段的步骤 (T-1)。 随后过滤当前片段中的离散时间音频信号。 然后可以将当前段中滤波的离散时间音频信号的能量与前一段中滤波的离散时间音频信号的能量或滤波后的离散时间音频信号的能量之间的当前关系进行比较 可以形成当前段的当前段和未过滤离散时间音频信号的能量,并将该当前关系与先前的对应关系进行比较。 基于这些比较中的一个和/或另一个,检测离散时间音频信号中是否存在瞬态。