Lossless data embedding
    1.
    发明申请
    Lossless data embedding 审中-公开
    无损数据嵌入

    公开(公告)号:US20060075240A1

    公开(公告)日:2006-04-06

    申请号:US10542894

    申请日:2004-01-23

    IPC分类号: H04L9/00

    摘要: Many methods for reversible watermarking (embedding schemes that allow perfect reconstruction of the original host signal) are highly fragile in the sense that the slightest modification of watermarked content prohibits the recovery of both the original signal as well as the embedded auxiliary data. In order to obtain robustness against transmission or channel errors, the embedding method according to the invention accommodates error correction data in a portion of the data embedding capacity. In an advantageous embodiment, the host signal (36) is segmented in segments, and error correction data (p(n)) for a segment (S(n)) is accommodated in data (37) being embedded in a subsequent segment (S(n+1)) along with restoration data (r(n)) for reconstructing the host signal. The remaining portion of the embedding capacity is used for payload (w).

    摘要翻译: 许多可逆水印方法(允许原始主机信号的完美重建的嵌入方案)是非常脆弱的,因为水印内容的最细微修改禁止恢复原始信号以及嵌入式辅助数据。 为了获得针对传输或信道错误的鲁棒性,根据本发明的嵌入方法在数据嵌入容量的一部分中适应纠错数据。 在有利的实施例中,主机信号(36)被分段,并且对于段(S(n))的纠错数据(p(n))被容纳在被嵌入到后续段(S (n + 1))以及用于重建主机信号的恢复数据(r(n))。 嵌入容量的剩余部分用于有效载荷(w)。

    Relay For Multi-Carrier Wireless Communications System
    2.
    发明申请
    Relay For Multi-Carrier Wireless Communications System 审中-公开
    多载波无线通信系统的继电器

    公开(公告)号:US20080032651A1

    公开(公告)日:2008-02-07

    申请号:US11575143

    申请日:2005-09-14

    IPC分类号: H04B1/16

    CPC分类号: H04L27/2601 H04B7/155

    摘要: A relay, for use in an indoor multi-carrier radio frequency wireless communications system, stores multiple predetermined phase adjustment profiles. The best of the stored phase adjustment profiles is selected by a receiver, which sends a message to the relay, indicating the profile to be used. The selected stored phase adjustment profiles is then applied to a multi-carrier signal received at the relay, to form a phase adjusted multi-carrier signal, and this phase adjusted signal is then transmitted from the relay.

    摘要翻译: 用于室内多载波射频无线通信系统的继电器存储多个预定的相位调整曲线。 存储的相位调整曲线中最好的是由接收器选择,接收器向继电器发送消息,指示要使用的配置文件。 所选存储的相位调整曲线然后被施加到在继电器处接收的多载波信号,以形成相位调整的多载波信号,然后从继电器发送该相位调整信号。

    Method of inserting digital watermarks in one-bit audio files
    3.
    发明申请
    Method of inserting digital watermarks in one-bit audio files 审中-公开
    在一位音频文件中插入数字水印的方法

    公开(公告)号:US20070183455A1

    公开(公告)日:2007-08-09

    申请号:US10598638

    申请日:2005-03-04

    IPC分类号: H04J1/02

    摘要: There is described a method of processing a serial data signal to generate a corresponding transformed signal, for example encoded signal. The method includes steps of: (a) providing one or more signature sequences; (b) analysing the serial data signal to determine therein one or more signal sequences for which holds that combining such one or more signal sequences with said one or more signature sequences does not result in generation of illegal states; and (c) combining one or more of the determined signal sequences of the serial data signal with said one or more signature sequences so as to transform the serial data signal into the transformed signal. Moreover, there is also described apparatus (100) operable to execute the method and/or a corresponding inverse method.

    摘要翻译: 描述了一种处理串行数据信号以产生相应的变换信号(例如编码信号)的方法。 该方法包括以下步骤:(a)提供一个或多个签名序列; (b)分析串行数据信号以确定其中组合这样的一个或多个信号序列与所述一个或多个签名序列的一个或多个信号序列不导致非法状态的产生; 以及(c)将所述串行数据信号的所确定的信号序列中的一个或多个与所述一个或多个签名序列组合,以便将所述串行数据信号变换为变换信号。 此外,还描述了可操作以执行该方法和/或相应的逆方法的装置(100)。

    Encoding and decoding a media signal
    4.
    发明申请
    Encoding and decoding a media signal 有权
    对媒体信号进行编码和解码

    公开(公告)号:US20060033645A1

    公开(公告)日:2006-02-16

    申请号:US10529664

    申请日:2003-10-02

    IPC分类号: H03M7/00

    摘要: The invention discloses a method of embedding information for high quality restoration of a media signal (typically an audio-visual signal) in a lower quality version of the signal. To this end, the signal x is encoded using a high quality encoder (Q2). The code sequences z produced by the high quality encoder are mapped into code sequences y that are associated with a hypothetical lower quality encoder (Q1). The latter code sequences y are transmitted. A simple decoder will decode the received sequences y, and thus reproduce a low quality version of the signal. A more sophisticated decoder is arranged to inversely map the received code sequences y into the code sequences z, that were actually produced by the high quality encoder (Q2). The sophisticated decoder will thus reproduce a higher quality version of the same signal.

    摘要翻译: 本发明公开了一种在低质量版本的信号中嵌入用于媒体信号(通常是视听信号)的高质量恢复的信息的方法。 为此,使用高质量编码器(Q 2)对信号x进行编码。 由高质量编码器产生的码序列z被映射成与假设的低质量编码器(Q 1)相关联的码序列y。 后一码序列y被发送。 一个简单的解码器将对接收的序列y进行解码,从而再现信号的低质量版本。 更复杂的解码器被布置为将接收到的码序列y反向映射到实际由高质量编码器(Q 2)产生的码序列z中。 因此,复杂的解码器将再现相同信号的较高质量版本。

    Transmission system
    6.
    发明申请
    Transmission system 有权
    传输系统

    公开(公告)号:US20060045062A1

    公开(公告)日:2006-03-02

    申请号:US10529359

    申请日:2003-08-08

    IPC分类号: H04J3/16 H04J1/00 H04J3/22

    摘要: Described is a transmission system (10) for transmitting an information signal (21) via a plurality of subchannels from a transmitter (12) to a receiver (16). The transmitter (12) first demultiplexes the information signal (21) into a plurality of information subsignals (33). Next, the information subsignals (33) are encoded according to a code with certain properties, e.g. a maximum distance separable (MDS) code, and multiplexed. Finally, the resulting subsignals (31) are channel encoded and transmitted to the receiver (16). The receiver (16) comprises a channel decoder (46,52,76,128) for successively channel decoding the received subsignals by incorporating decoding information (83,87,91) of already channel decoded information subsignals. Next, the resulting subsignals are demultiplexed, decoded according to said code and multiplexed into an output signal. Said code enables input symbols to be encoded into output symbols such that k input symbols of the k-th information subsignal are encoded with a k×m-code into m output symbols, 1≦k≦m, said code having the following properties: all k input symbols and all m−k other output symbols are determinable from any k output symbols, and no m−l other output symbols are determinable from any l output symbols l

    摘要翻译: 描述了一种用于经由多个子信道从发射机(12)向接收机(16)发送信息信号(21)的传输系统(10)。 发射机(12)首先将信息信号(21)解复用为多个信息子信号(33)。 接下来,信息子信号(33)根据具有某些属性的代码进行编码,例如, 最大距离可分离(MDS)码,并进行复用。 最后,所生成的子信号(31)被信道编码并发送到接收机(16)。 接收器(16)包括一个信道解码器(46,52,76,128),用于通过结合已经是信道解码的信息子信号的解码信息(83,87,91)来连续地对接收到的子信号进行解码。 接下来,所生成的子信号被解复用,根据所述代码进行解码并被多路复用为输出信号。 所述代码使得能够将输入符号编码为输出符号,使得第k个信息副信号的k个输入符号用k×m个码编码为m个输出符号,1≤k≤m,所述代码具有以下特性: 所有k个输入符号和所有mk个其他输出符号可以从任何k个输出符号确定,并且不能从任何l个输出符号确定其他输出符号l