Digital data transmission method and apparatus
    23.
    发明公开
    Digital data transmission method and apparatus 失效
    用于传送数字数据的方法和装置。

    公开(公告)号:EP0637174A3

    公开(公告)日:1996-01-24

    申请号:EP94111792.1

    申请日:1994-07-28

    摘要: A method for transmitting pieces of synchronized picture data having the same data length of which each include a synchronizing signal, an identifying code, pieces of compressed picture data having different data lengths and an error correcting code in that order is disclosed. To correctly decode each of the compressed picture data, it is required to start an decoding operation from a head address of each of the compressed picture signal. Therefore, in cases where a head address of a piece of compressed picture data exists in a piece of synchronized, an existence information flag for informing the existence of the head address, an address pointer for indicating an address of the head address, and a block number for indicating a position of the compressed picture data having the head address are added just after the identifying code to correctly decode the compressed picture data and other pieces of following compressed picture data in the synchronized picture data. In contrast, in cases where any head address does not exists, a no-existence information flag for informing the no-existence of the head address is merely added just after the identifying code.

    Procédé et dispositif d'insertion de données asynchrones sur un signal numérique
    24.
    发明公开
    Procédé et dispositif d'insertion de données asynchrones sur un signal numérique 失效
    埃及数字信号中的维特弗伦和Einrichtung zurEinfügungvon asynchronen Daten

    公开(公告)号:EP0690623A1

    公开(公告)日:1996-01-03

    申请号:EP95401468.4

    申请日:1995-06-21

    发明人: Le Garrec, Thomas

    摘要: L'invention concerne un procédé d'insertion d'échantillons représentant des données numériques issues d'une première source (1) ayant un premier débit (Fb) dans un signal numérisé issu d'une seconde source (3) ayant un second débit (Fp).
    Ce procédé est caractérisé en ce que le second débit (Fp) étant supérieur au premier débit (Fb), on associe chaque donnée (Bi) de la première source (1) à au moins un échantillon d'une série d'échantillons au second débit (Fp), les échantillons étant présentés à un filtre polyphase (6) dont chaque jeu de coefficients est associé à une erreur de phase (Phase) donnée précédemment introduite par ladite association, les échantillons filtrés étant inclus (8) dans le signal numérisé.
    L'invention a aussi pour objet un dispositif mettant en oeuvre le procédé ci-dessus.
    L'invention s'applique notamment à l'insertion, dans un signal vidéo numérisé, de données télétexte.

    摘要翻译: 该方法涉及将以第一速率从第一源(1)发送的第一组数字数据插入以第二速率从第二源(3)发送的数字信号。 第二比率高于第一率。 来自第一来源的每个数据字与来自第二速率的一系列样本的至少一个样本相关联。 样本被馈送到多相滤波器(6),其中每组系数与先前引入的相位误差数据相关联。 滤波后的样本被包含在数字信号中。

    Variable-length data alignment apparatus for digital video data
    25.
    发明公开
    Variable-length data alignment apparatus for digital video data 失效
    装置用于数字视频的可变长度数据的调整。

    公开(公告)号:EP0597439A3

    公开(公告)日:1995-09-20

    申请号:EP93118139.0

    申请日:1993-11-09

    IPC分类号: H03M7/42 H04N7/30 H04N7/54

    摘要: A variable-length data alignment apparatus receives header data (MHD) and blocks (B1-B6) from different sources, forms a header (MH) based on the received header data (MHD) and outputs the header (MH) followed by blocks (B1-B6). The variable-length data alignment apparatus has a RAM (4) for storing the header data (MHD), and a buffer (3) for storing the blocks (B1-B6). A processor (5) produces a plurality of commands (C1-C4) and processes the header data (MHD) from said first memory means (4). The commands are prosecuted in multiplexer (8) and bit stream coder (9) to form header (MH) and to append said blocks (B1-B6) from said first memory means (4) after said header (MH).

    Data receiving apparatus and method
    26.
    发明公开
    Data receiving apparatus and method 失效
    Verfahren und Vorrichtung zum Datenempfang。

    公开(公告)号:EP0651584A2

    公开(公告)日:1995-05-03

    申请号:EP94116465.9

    申请日:1994-10-19

    IPC分类号: H04N7/54 H04N7/50

    摘要: The present invention is to provide a decoder which detects a start code in a layered coded data stream on a layer basis.
    The decoder includes a unique pattern detector which detects a start code pattern in the layered coded data stream, a start code identifier which identifies the detected start code pattern based on a given condition, a similarity calculator which calculates similarity as an evaluation between an erroneously detected start code pattern and an expected start code based on layer, and a similarity based replacement identifier which replaces the erroneous start code pattern by the most appropriate replacement selected based on the similarity based evaluation, and otherwise the priority based replacement identifier which selects a replacement by the priority order.

    摘要翻译: 本发明提供一种解码器,其基于分层编码数据流检测起始码,用于改进误差检测功能以减少可能的损害效应,并通过适当的起始码将检测到的带有较小误差的起始码替换为 维持解码。 解码器包括检测分层编码数据流中的起始码模式的独特模式检测器,基于给定条件识别检测到的起始码模式的起始码标识符;计算相似度作为检测到的错误之间的评估的相似度的相似度计算器 基于层的起始码模式和期望的开始码,以及基于相似性的评估替代所选择的最适当的替换来替代检测到错误的起始码模式的相似性替换标识符,否则选择替换的基于优先级的替换标识符 按优先顺序。

    Digital data transmission method and apparatus
    27.
    发明公开
    Digital data transmission method and apparatus 失效
    Verfahren und Vorrichtung zurÜbertragungvon digitalen Daten。

    公开(公告)号:EP0637174A2

    公开(公告)日:1995-02-01

    申请号:EP94111792.1

    申请日:1994-07-28

    摘要: A method for transmitting pieces of synchronized picture data having the same data length of which each include a synchronizing signal, an identifying code, pieces of compressed picture data having different data lengths and an error correcting code in that order is disclosed. To correctly decode each of the compressed picture data, it is required to start an decoding operation from a head address of each of the compressed picture signal. Therefore, in cases where a head address of a piece of compressed picture data exists in a piece of synchronized, an existence information flag for informing the existence of the head address, an address pointer for indicating an address of the head address, and a block number for indicating a position of the compressed picture data having the head address are added just after the identifying code to correctly decode the compressed picture data and other pieces of following compressed picture data in the synchronized picture data. In contrast, in cases where any head address does not exists, a no-existence information flag for informing the no-existence of the head address is merely added just after the identifying code.

    摘要翻译: 公开了一种用于发送具有相同数据长度的同步图像数据的方法,每个同步图像数据分别包括同步信号,识别码,具有不同数据长度的压缩图像数据片段和纠错码。 为了对每个压缩图像数据进行正确解码,需要从压缩图像信号中的每一个的头部地址开始解码操作。 因此,在同步的一块存在一块压缩图像数据的头地址的情况下,存在用于通知头地址的存在的存在信息标志,用于指示头地址的地址的地址指针和块 用于指示具有头部地址的压缩图像数据的位置的数字被添加在识别码之后,以正确地解码同步图像数据中的压缩图像数据和其他随后的压缩图像数据。 相反,在不存在任何头地址的情况下,仅在识别码之后添加用于通知头部地址不存在的不存在信息标志。