Video data reduction in MPEG bit stream
    1.
    发明授权
    Video data reduction in MPEG bit stream 有权
    MPEG比特流中的视频数据缩减

    公开(公告)号:US07734146B1

    公开(公告)日:2010-06-08

    申请号:US11485171

    申请日:2006-07-11

    IPC分类号: H04N5/91 H04N7/26

    摘要: Video data in an encoded frame is reduced by adjusting orthogonal transform coefficients in the encoded frame during trick play operation such as fast forward or fast reverse. The orthogonal transform coefficients are adjusted by selecting essential orthogonal transform coefficients with high energy and non-essential orthogonal transform coefficients with low energy, maintaining or strengthening the essential orthogonal transform coefficients and attenuating or removing the non-essential orthogonal transform coefficients. In an MPEG bit stream, the encoded frame is an I-frame and the orthogonal transform coefficients are discrete cosine transform (DCT) coefficients.

    摘要翻译: 通过在诸如快进或快退等特技播放操作中调整编码帧中的正交变换系数来减少编码帧中的视频数据。 通过选择具有低能量的高能量和非必要正交变换系数的基本正交变换系数来调整正交变换系数,维持或加强基本正交变换系数,并衰减或去除非必要正交变换系数。 在MPEG比特流中,编码帧是I帧,正交变换系数是离散余弦变换(DCT)系数。

    Disk drive with flexible data stream encryption
    2.
    发明授权
    Disk drive with flexible data stream encryption 有权
    具有灵活数据流加密的磁盘驱动器

    公开(公告)号:US07606364B1

    公开(公告)日:2009-10-20

    申请号:US10131646

    申请日:2002-04-23

    申请人: Yin Shih

    发明人: Yin Shih

    IPC分类号: H04L9/18

    摘要: A cipher engine performs cipher processing (encrypting/decrypting) on logical data streams in a physical data stream in a storage device. As the physical data stream changes from a first logical data stream to a second logical data stream, and the cipher engine switches from cipher processing the first logical data stream to the second logical data stream, cipher information of the first logical data stream is stored in a cipher state memory, cipher information of the second logical data stream is retrieved from the cipher state memory, and the cipher engine resumes cipher processing the second logical data stream using the cipher information of the second logical data stream. Advantageously, a virtually unlimited number of logical data streams is supported and duplicate cipher hardware is avoided.

    摘要翻译: 密码引擎对存储设备中的物理数据流中的逻辑数据流执行加密处理(加密/解密)。 随着物理数据流从第一逻辑数据流变化到第二逻辑数据流,并且密码引擎从第一逻辑数据流的密码处理切换到第二逻辑数据流,将第一逻辑数据流的密码信息存储在 密码状态存储器,从密码状态存储器检索第二逻辑数据流的密码信息,并且密码引擎使用第二逻辑数据流的密码信息恢复对第二逻辑数据流的密码处理。 有利地,支持几乎无限数量的逻辑数据流,并避免重复的密码硬件。

    Data storage device security system
    3.
    发明授权
    Data storage device security system 有权
    数据存储设备安全系统

    公开(公告)号:US07507096B1

    公开(公告)日:2009-03-24

    申请号:US11246918

    申请日:2005-10-07

    IPC分类号: H01R13/44

    CPC分类号: G06F1/181 G06F2200/1639

    摘要: A locking data cable (24) is disclosed. The data cable (24) includes a data plug (26) and an associated lock (32). When the data plug (26) is engaged with a data port (16) of a data storage device (12), an actuator (38) of the locking data cable (24) may be used to change the lock (32) from an unlocked position to a locked position.

    摘要翻译: 公开了一种锁定数据电缆(24)。 数据线(24)包括数据插头(26)和相关锁(32)。 当数据插头(26)与数据存储装置(12)的数据端口(16)接合时,锁定数据电缆(24)的致动器(38)可用于将锁(32)从 解锁位置到锁定位置。