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    DIGITAL VIDEO BROADCAST RECEIVER AND METHOD FOR RECEIVING DIGITAL VIDEO BROADCAST DATA
    1.
    发明申请
    DIGITAL VIDEO BROADCAST RECEIVER AND METHOD FOR RECEIVING DIGITAL VIDEO BROADCAST DATA 审中-公开
    数字视频广播接收机和接收数字视频广播数据的方法

    公开(公告)号：US20100223653A1

    公开(公告)日：2010-09-02

    申请号：US12733190

    申请日：2008-08-18

    申请人： Arie G. C. Koppelaar ,  Onno Eerenberg ,  Armand M. Stuivenwold

    发明人： Arie G. C. Koppelaar ,  Onno Eerenberg ,  Armand M. Stuivenwold

    IPC分类号： H04N5/44

    CPC分类号： H04N21/23406 ,  H04N21/4331 ,  H04N21/4345 ,  H04N21/4384 ,  H04N21/44004 ,  H04N21/64315

    摘要： A digital video broadcast receiver for receiving data of a plurality of services (S1-S3) which are transmitted in bursts of data over a transmission channel is provided. The receiver comprises a rendering unit (HH) for rendering data of a selected first service (S1) from the plurality of services (S1-S3). The receiver furthermore comprises at least one memory unit (FM, SC) for caching at least one received burst of data associated to the selected first service (S1) of the plurality of services (S1-S3). The memory is furthermore used for caching at least a first part of a received burst of data of at least a second service (S2) of the plurality of services (S1-S3). The receiver furthermore comprises an input unit (HH) for inputting a zap command to switch the rendering of the first service (S1) to a second service (S2) of the plurality of services (S1-S3). The rendering unit (HH) is furthermore adapted to render at least the cached first part of the received burst of data of the second service (S2) when the zap command is received by the input unit (HH).

    摘要翻译： 提供了一种数字视频广播接收机，用于接收通过传输信道以数据突发方式发送的多个服务（S1-S3）的数据。 接收机包括用于从多个服务（S1-S3）呈现所选择的第一服务（S1）的数据的呈现单元（HH）。 接收机还包括至少一个存储单元（FM，SC），用于高速缓存与多个服务（S1-S3）中的所选择的第一服务（S1）相关联的至少一个接收到的数据突发。 此外，存储器还用于高速缓存多个服务（S1-S3）中的至少第二服务（S2）的所接收的数据突发的至少第一部分。 接收机还包括用于输入zap命令以将第一服务（S1）的呈现切换到多个服务（S1-S3）中的第二服务（S2）的输入单元（HH）。 再现单元（HH）还适于当输入单元（HH）接收到zap命令时，至少渲染所接收的第二服务的突发数据的第一部分（S2）。

    Method of transmitting a data stream, transmitter and receiver
    2.
    发明授权
    Method of transmitting a data stream, transmitter and receiver 失效
    传输数据流，发射机和接收机的方法

    公开(公告)号：US5416767A

    公开(公告)日：1995-05-16

    申请号：US192893

    申请日：1994-02-07

    申请人： Arie G. C. Koppelaar ,  Constant P. M. J. Baggen

    发明人： Arie G. C. Koppelaar ,  Constant P. M. J. Baggen

    IPC分类号： H04B1/04 ,  H04B1/10 ,  H04B7/005 ,  H04J11/00 ,  H04L27/26

    CPC分类号： H04L27/2602 ,  H04L27/2628 ,  H04L27/265

    摘要： The invention relates to a method of transmitting data by modulating a frequency multiplex of carriers at a relatively low symbol rate, such as in OFDM (orthogonal frequency division multiplex). According to the inventive method, intersymbol interference is deliberately introduced at the transmitter side to reduce cross-talk between data of different carriers at the receiver side, such as to simplify an equalizing device in a receiver. The intersymbol interference at the transmitter side is introduced after the frequency multiplex modulation has taken place, by repeating groups of output symbols produced by an IFFT transformer and subsequently shaping these repeated groups by means of symbol-by-symbol scaling with coefficients constituting a window function. Subsequent shaped and repeated groups of these output symbols mutually overlap.

    摘要翻译： 本发明涉及一种以OFDM（正交频分多路复用）方式，以相对低的符号速率调制载波的频率复用来发送数据的方法。 根据本发明的方法，在发射机侧故意引入符号间干扰，以减少接收机侧的不同载波的数据之间的串扰，例如简化接收机中的均衡设备。 在频率多路调制发生之后，通过重复由IFFT变换器产生的输出符号组，随后通过符号缩放与构成窗口函数的系数对这些重复组进行整形，在发射机侧引入符号间干扰 。 这些输出符号的后续成形和重复组相互重叠。

    Receiver
    3.
    发明授权
    Receiver 失效
    接收器

    公开(公告)号：US5483529A

    公开(公告)日：1996-01-09

    申请号：US190978

    申请日：1994-02-03

    申请人： Constant P. M. J. Baggen ,  Arie G. C. Koppelaar

    发明人： Constant P. M. J. Baggen ,  Arie G. C. Koppelaar

    IPC分类号： H04B1/10 ,  H04B7/005 ,  H04J11/00 ,  H04L27/26 ,  H04N5/44 ,  H04N7/08 ,  H04N7/081 ,  H04B1/74

    CPC分类号： H04L27/2653

    摘要： Receiver for receiving a transmission signal comprising N frequency multiplexed data modulated carriers, having a good compromise between insensitivity to multipath reception and receiver complexity, and which may enable a reduction in transmission bandwidth and transmitter power. In such a receiver, modulation signals of the carriers are supplied by a frequency multiplex demodulator to a symbol detection device via an equalizer device. The equalizer device compensates distortion in the modulation signals supplied thereto, such that the symbol detection device may detect the transmitted data with reduced error probability. When the transmission signal reaches the receiver with different delay times, this distortion is mainly a kind of cross-talk between the modulation of adjacent carriers. Therefore substantial compensation is achieved by combining the modulation signal of a carder with signals representative of the data of the adjacent carriers. In the receiver, these signals may be obtained from the multiplex signal path between the frequency multiplex demodulator output and the output of the symbol detection device.

    摘要翻译： 用于接收包括N个频率复用数据调制载波的传输信号的接收机，在对多路径接收的不敏感性和接收机复杂度之间具有良好的折中，并且可以实现传输带宽和发射机功率的降低。 在这种接收机中，载波的调制信号由频率复用解调器通过均衡器装置提供给符号检测装置。 均衡器装置补偿提供给其的调制信号中的失真，使得符号检测装置可以以较低的误差概率检测发送的数据。 当传输信号到达具有不同延迟时间的接收机时，该失真主要是相邻载波的调制之间的一种串扰。 因此，通过将梳理器的调制信号与表示相邻载波的数据的信号组合来实现大量的补偿。 在接收机中，可以从频率复用解调器输出和符号检测装置的输出之间的多路复用信号路径获得这些信号。

    Transmission system having a simplified channel decoder
    6.
    发明授权
    Transmission system having a simplified channel decoder 有权
    具有简化信道解码器的传输系统

    公开(公告)号：US06304612B1

    公开(公告)日：2001-10-16

    申请号：US09316985

    申请日：1999-05-24

    申请人： Constant P. M. J. Baggen ,  Arie G. C. Koppelaar

    发明人： Constant P. M. J. Baggen ,  Arie G. C. Koppelaar

    IPC分类号： H04L2302

    CPC分类号： H03M13/6502 ,  H03M13/4123 ,  H03M13/4169

    摘要： In a tailbiting convolutional encoder the encoder (12) is initialized with a sequence of symbols corresponding to the final symbols of a sequence to be encoded, resulting in that the begin state and the final state of the encoder are the same. The problem of the convolutional code obtained by such a coder is that it requires a substantial computational resources to decode it. In the simplified decoder according to the invention, the decoding process is extended by a plurality of trellis sections to a length N+&ngr;. At the final trellis section, the state with the largest path metric is selected as the best state. This best state is used as staring point for a trace back operation to find an earlier state at N trellis section before the final trellis section. The earlier state found there is regarded as correct, having as consequence that the trellis should terminate also in said state. By performing a trace back from said state the source symbols can be found.

    摘要翻译： 在尾部卷积编码器中，编码器（12）用对应于要编码的序列的最终符号的符号序列初始化，导致编码器的开始状态和最终状态相同。 由这样的编码器获得的卷积码的问题在于它需要大量的计算资源来解码它。 在根据本发明的简化解码器中，解码过程被多个网格部分扩展到长度N +＆ngr。 在最后的网格部分，选择最大路径度量的状态作为最佳状态。 这个最佳状态被用作追溯操作的焦点，以便在最后的网格部分之前的N网格部分找到一个较早的状态。 较早的国家发现被认为是正确的，结果是网格也应该在所述状态下终止。 通过从所述状态执行跟踪，可以找到源符号。