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    Digital transmission system using subband coding of a digital signal
    2.
    发明公开
    Digital transmission system using subband coding of a digital signal 失效
    使用数字信号的子带编码的数字传输系统

    公开(公告)号：EP0400755A1

    公开(公告)日：1990-12-05

    申请号：EP90201369.7

    申请日：1990-05-30

    申请人： Philips Electronics N.V. ,  FRANCE TELECOM ,  TELEDIFFUSION DE FRANCE

    发明人： Rault, Jean Bernard ,  Dehery, Yves François ,  Roudaut, Jean Yves ,  Bruekers, Alphons Antonius Maria Lambertus ,  Veldhuis, Raymond Nicolaas Johan

    IPC分类号： H04B1/66

    CPC分类号： H04B1/667 ,  G06T9/007 ,  H03H17/0266

    摘要： A digital transmission system is disclosed having a transmitter (3,6,9) and a receiver (13,16,19) for transmitting a digital signal, such as a digital audio signal, having a given sampling rate F S . The digital signal is subband coded into M subbands with sampling rate reduction. To that purpose the transmitter includes a first unit (3) for splitting up the digital signal into M signals having a sampling rate F S /M. These signals are available at the outputs (4.1 to 4.M) of the first unit (3), and are applied to M analysis filters (6.1 to 6.M), each filter (6.m) having one input (5.m) and two outputs (7.ma and 7.mb). The 2M filter outputs are coupled to 2M inputs (8.1 to 8.2M) of a signal processing unit 9 which has M outputs (10.1 to 10.M) for supplying the M subband signals (S₁ to S M ) Each filter (6.m) is adapted to apply two different filterings on the signal applied to its input and to supply the two different filtered versions of the input signal to its two outputs. The signal processing unit 9 is adapted to supply output signals on each of the M outputs, an output signal being a combination of at least a number of input signals applied to its 2M inputs. On the receiver side a signal processing is carried out which is largely inverse to the signal processing on the transmitter side, in order to realize a signal at the output (21) that is a nearly perfect reconstruction of the input signal.

    摘要翻译： 公开了一种数字传输系统，其具有用于传输具有给定采样率FS的数字信号（例如数字音频信号）的发射器（3,6,9）和接收器（13,16,19）。 数字信号以降低采样速率的方式被子带编码为M个子带。 为此目的，发射机包括第一单元（3），用于将数字信号分成具有采样率FS / M的M个信号。 这些信号在第一单元（3）的输出（4.1到4.M）处可用，并且被应用于M个分析滤波器（6.1到6.M），每个滤波器（6.m）具有一个输入（5.10）。 m）和两个输出（7.ma和7.mb）。 2M滤波器输出端耦合到信号处理单元9的2M个输入端（8.1到8.2M），信号处理单元9有M个输出端（10.1到10.M）用于提供M个子带信号（S 1到SM）每个滤波器（6.m） 适用于对施加于其输入端的信号应用两种不同的滤波，并将输入信号的两种不同滤波版本提供给其两个输出端。 信号处理单元9适用于在M个输出中的每个输出上提供输出信号，输出信号是施加到其2M个输入的至少多个输入信号的组合。 在接收机侧执行信号处理，该信号处理与发射机侧的信号处理大部分相反，以便在输出（21）处实现接近完美的输入信号重构的信号。

    Digital transmission system using subband coding of a digital signal
    3.
    发明公开
    Digital transmission system using subband coding of a digital signal 失效
    DigitalesÜbertragungssystemunter Verwendung der Teilbandkodierung eines digitalen Signals。

    公开(公告)号：EP0400222A1

    公开(公告)日：1990-12-05

    申请号：EP89201408.5

    申请日：1989-06-02

    申请人： ETAT FRANCAIS représenté par le Ministère des Postes, des Télécommunications et de l'Espace ,  TELEDIFFUSION DE FRANCE ,  Philips Electronics N.V.

    发明人： Rault, Jean Bernard ,  Dehery, Yves François ,  Roudaut, Jean Yves ,  Bruekers, Alphons Antonius Maria Lambertus ,  Veldhuis, Raymond Nicolaas Johan

    IPC分类号： H04B1/66

    CPC分类号： H04B1/667 ,  G06T9/007 ,  H03H17/0266

    摘要： A digital transmission system is disclosed having a transmitter (3,6,9) and a receiver (13,16,19) for transmitting a digital signal, such as a digital audio signal, having a given sampling rate F S . The digital signal is subband coded into M subbands with sampling rate reduction. To that purpose the transmitter includes a first unit (3) for splitting up the digital signal into M signals having a sampling rate F S /M. These signals are available at the outputs (4.1 to 4.M) of the first unit (3), and are applied to M analysis filters (6.1 to 6.M), each filter (6.m) having one input (5.m) and two outputs (7.ma and 7.mb). The 2M filter outputs are coupled to 2M inputs (8.1 to 8.2M) of a signal processing unit 9 which has M outputs (10.1 to 10.M) for supplying the M subband signals (S₁ to S M ). Each filter (6.m) is adapted to apply two different filterings on the signal applied to its input and to supply the two different filtered versions of the input signal to its two outputs. The signal processing unit 9 is adapted to supply output signals on each of the M outputs, an output signal being a combination of at least a number of input signals applied to its 2M inputs. On the receiver side of signal processing is carried out which is largely inverse to the signal processing on the transmitter side, in order to realize a signal at the output (21) that is a nearly perfect reconstruction of the input signal.

    摘要翻译： 公开了一种具有发送器（3,6,9）和用于发送具有给定采样率FS的数字信号（例如数字音频信号）的接收器（13,16,19）的数字传输系统。 数字信号以采样率降低的子带编码为M个子带。 为此，发射机包括用于将数字信号分解成具有采样率FS / M的M个信号的第一单元（3）。 这些信号在第一单元（3）的输出（4.1至4.M）上可用，并被应用于M个分析滤波器（6.1至6.M），每个滤波器（6.m）具有一个输入（5。 m）和两个输出（7.ma和7.mb）。 2M滤波器输出耦合到具有用于提供M个子带信号（S1至SM）的M个输出（10.1至10.M）的信号处理单元9的2M输入（8.1至8.2M）。 每个滤波器（6.m）适用于对其输入端施加的信号应用两个不同的滤波器，并将输入信号的两个不同的滤波版本提供给其两个输出。 信号处理单元9适于在M个输出中的每一个上提供输出信号，输出信号是施加到其2M个输入的至少多个输入信号的组合。 在信号处理的接收机侧进行与发送机侧的信号处理大相反的接收机侧，以便实现输出（21）处的输入信号几乎完美重构的信号。