Digital video preprocessor horizontal and vertical filters
    1.
    发明授权
    Digital video preprocessor horizontal and vertical filters 失效
    数字视频预处理器水平和垂直滤波器

    公开(公告)号:US6064450A

    公开(公告)日:2000-05-16

    申请号:US753354

    申请日:1996-11-25

    CPC分类号: H04N19/80

    摘要: An apparatus for pre-processing of a digital video data stream including luminance and chrominance pixel data, the apparatus comprising a plurality of pre-processing units including a horizontal filter unit and a vertical filter unit. The horizontal filter unit is located at an input side and the vertical filter unit is located at an output side of the preprocessing apparatus and wherein all read/write memory for storing data outputted from or inputted to the plurality of pre-processing units is contained in a single memory block.

    摘要翻译: 一种用于对包括亮度和色度像素数据的数字视频数据流进行预处理的装置,该装置包括包括水平滤波器单元和垂直滤波器单元的多个预处理单元。 水平滤波器单元位于输入侧,垂直滤波单元位于预处理装置的输出侧,并且其中存储从多个预处理单元输出或输入到多个预处理单元的数据的所有读/写存储器包含在 单个内存块。

    Method and apparatus for error correction in a process of decoding cross-interleaved Reed-Solomon code (CIRC)
    2.
    发明授权
    Method and apparatus for error correction in a process of decoding cross-interleaved Reed-Solomon code (CIRC) 失效
    在交错交错的里德 - 所罗门码(CIRC)解码过程中进行纠错的方法和装置

    公开(公告)号:US06718505B1

    公开(公告)日:2004-04-06

    申请号:US09723423

    申请日:2000-11-28

    IPC分类号: H03M1300

    摘要: The invention relates to an error-correction method for use in a process of decoding cross-interleaved Reed-Solomon code (CIRC) that corrects errors in data stored as C1 code words and C2 code words in a memory with several locations, each of said locations containing a data byte of said data, and an apparatus performing said method. The new method implies specific regulations for defining which data words are to be used for C1 and C2 decoding and for the processing order. The system memory for a deinterleaver implementation can be of a smaller size as compared to conventional memories. In addition, only a single CIRC decoder needs to be used for performing the process of decoding cross-interleaved Reed-Solomon code.

    摘要翻译: 本发明涉及一种纠错方法,用于对交错交错的里德 - 所罗门码(CIRC)进行解码,该纠错方法用于校正存储有多个位置的存储器中的C1码字和C2码字的数据中的错误, 包含所述数据的数据字节的位置,以及执行所述方法的装置。 新方法意味着用于定义要用于C1和C2解码以及处理顺序的数据字的具体规定。 与传统存储器相比,用于解交织器实现的系统存储器可以具有较小的尺寸。 另外,仅需要使用单个CIRC解码器来执行解码交错的里德 - 所罗门码的处理。

    Method and apparatus for encrypting and for decrypting data arranged in a data sector
    3.
    发明授权
    Method and apparatus for encrypting and for decrypting data arranged in a data sector 有权
    用于加密和解密布置在数据扇区中的数据的方法和装置

    公开(公告)号:US06912661B1

    公开(公告)日:2005-06-28

    申请号:US09355219

    申请日:1998-01-15

    摘要: A method and apparatus for preventing unauthorized use of DVDs on a DVD ROM drive. The method comprises a DVD disc that includes special data processing. When the DVD is replayed on a standard DVD ROM drive the invention causes the output of the DVD ROM drive to be erroneous, such that the computer cannot use the data. According to the invention, when encoding a disc, the error correction and/or error detection bits, check bytes, are moved into the normal or main data area. When this scrambled data is output from a standard DVD ROM drive, the data in the check byte area is lost and the information is not useable. For authorized use, this scrambling is reversed before sending video and/or audio data to the MPED decoder and AC-3 decoder respectively.

    摘要翻译: 一种用于防止在DVD ROM驱动器上非法使用DVD的方法和装置。 该方法包括一个包含特殊数据处理的DVD盘。 当在标准DVD ROM驱动器上重放DVD时,本发明导致DVD ROM驱动器的输出错误,使得计算机不能使用该数据。 根据本发明,当对盘进行编码时,纠错和/或错误检测位,校验字节被移动到正常或主数据区。 当从标准DVD ROM驱动器输出该加密数据时,检查字节区域中的数据丢失并且该信息不可用。 对于授权使用,在将视频和/或音频数据分别发送到MPED解码器和AC-3解码器之前,该加扰是相反的。

    Digital detector circuit for recovering the bit timing from a data stream
    4.
    发明授权
    Digital detector circuit for recovering the bit timing from a data stream 失效
    用于从数据流恢复比特定时的数字检测器电路

    公开(公告)号:US5946363A

    公开(公告)日:1999-08-31

    申请号:US762750

    申请日:1996-12-10

    摘要: A digital detector circuit for recovering the bit timing of a data stream with a PLL includes a digital phase detector and a digital pulse length detector whose output signals are added and integrated, and the result is used for controlling the oscillator frequency. The output signal of the pulse length detector is determined by a corresponding algorithm, one slow and two fast, with direction-dependent output signals of the pulse length detector being generated.

    摘要翻译: 用于利用PLL恢复数据流的比特定时的数字检测器电路包括数字相位检测器和数字脉冲长度检测器,其输出信号被相加和积分,结果用于控制振荡器频率。 脉冲长度检测器的输出信号由相应的算法确定,一个慢速和两次快速,产生脉冲长度检测器的方向依赖输出信号。