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    • 1. 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 。
    • 3. 发明授权
    • Process for reducing data in the transmission and/or storage of digital
signals from several interdependent channels
    • 用于减少来自几个相互依赖的信道的数字信号的传输和/或存储中的数据的过程
    • US5703999A
    • 1997-12-30
    • US751456
    • 1996-11-18
    • Jurgen HerreDieter SeitzerKarl-Heinz BrandenburgErnst Eberlein
    • Jurgen HerreDieter SeitzerKarl-Heinz BrandenburgErnst Eberlein
    • H04B1/66H04S1/00G10L3/00
    • H04B1/665H04S1/007
    • A process for reducing data in the transmission and/or storage of digital signals of several interdependent channels is described. As the signals from the channels are not independent of one another, an additional data quantity reduction is possible during transmission. In known processes for the coding of signals from two stereo channels, in the case of an unfavorable signal composition interference can be caused by the coding process and cannot be concealed by the signal actually present in the channel and consequently reduce listening enjoyment. In the process according to the invention and with the aid of the spectral values of corresponding blocks of several channels, there is a balancing of the necessary data rate for a separate coding of the two channels and for a joint coding. There is a joint coding of the channels for as long as the data rate for the joint coding does not exceed by a predeterminable value the data rate for the separate coding of the particular channel. In this case the spectral values of the corresponding blocks are similar, so that a joint coding is preferred. In the case of highly dissimilar signals the balancing leads to a separate transmission of the signals. In order to ensure that there is no interference, temporarily no use is made of the joint coding of several channels.
    • 描述了用于减少数个相互依赖的信道的数字信号的发送和/或存储中的数据的过程。 由于来自信道的信号不是彼此独立的,所以在传输期间可以进一步减少数据量。 在用于编码来自两个立体声信道的信号的已知过程中,在不利的信号组合的情况下,可能由编码过程引起干扰,并且不能被实际存在于信道中的信号所隐藏,从而减少听觉享受。 在根据本发明的过程中并且借助于几个信道的相应块的频谱值,存在对于两个信道的单独编码和联合编码的必要数据速率的平衡。 只要联合编码的数据速率不超过特定信道的单独编码的数据速率的可预定值,则存在信道的联合编码。 在这种情况下,相应块的频谱值是相似的,因此优选联合编码。 在高度不相似信号的情况下,平衡导致信号的单独传输。 为了确保没有干扰,暂时没有使用几个通道的联合编码。