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    • 4. 发明授权
    • Audio scrambling system for scrambling and descrambling audio signals
    • 用于加扰和解扰音频信号的音频加扰系统
    • US5668879A
    • 1997-09-16
    • US619236
    • 1996-03-21
    • Susumu IbarakiNoboru KattaSeiji NakamuraHiroki Murakami
    • Susumu IbarakiNoboru KattaSeiji NakamuraHiroki Murakami
    • H04K1/02H04K1/00H04M1/68
    • H04K1/02
    • A scrambling system includes a scrambling apparatus and a descrambling apparatus for scrambling and descrambling digital audio codes having plural sub-band units. Each sub-band unit includes at least a scale factor and a quantized sample data which is quantized after scaling with the scale factor. In the scrambling apparatus, a sample period during which the quantized sample data is present is detected, and only the quantized sample data is scrambled at the sample period. In particular, the quantized sample data and data other than the quantized sample data are separated, and the separated quantized sample data is applied to a scrambler, and the other data is applied to a delay circuit. The separated and scrambled quantized sample data and the delayed data are synthesized. The descrambling apparatus also detects a sample period during which the quantized sample data is present, and descrambles only the scrambled quantized sample data at the sample period.
    • 加扰系统包括加扰装置和用于对具有多个子带单元的数字音频码进行加扰和解扰的解扰装置。 每个子带单元至少包括比例因子和量化后的样本数据,该样本数据在缩放比例因子后进行量化。 在加扰装置中,检测存在量化采样数据的采样周期,并且仅在采样周期对量化的采样数据进行加扰。 特别地,量化的采样数据和除了量化的采样数据之外的数据被分离,并且将分离的量化采样数据应用于扰频器,并且将另一数据应用于延迟电路。 分离和加扰量化的样本数据和延迟数据被合成。 解扰装置还检测存在量化样本数据的采样周期,并且在采样周期仅解扰加扰的量化样本数据。
    • 6. 发明授权
    • Scrambling apparatus and descrambling apparatus
    • 加扰装置和解扰装置
    • US5706346A
    • 1998-01-06
    • US321757
    • 1994-10-12
    • Noboru KattaHiroki MurakamiSusumu IbarakiSeiji Nakamura
    • Noboru KattaHiroki MurakamiSusumu IbarakiSeiji Nakamura
    • H04N7/167
    • H04N7/1675
    • A scrambling apparatus has at least one of the following processing units: a signal inserting processor for inserting a dummy pattern indicating the quantization width in the compressed video data; a conversion processor for scrambling a signal specifying whether field or frame processing is used; a DCT coefficient conversion processor for scrambling a part of the code defining the DCT coefficient; an intra.sub.-- dc.sub.-- precision conversion processor for scrambling the intra.sub.-- dc.sub.-- precision signal; and an alternate.sub.-- scan conversion processor for scrambling the alternate .sub.-- scan signal. A descrambling apparatus reverses the conversion process on the video data scrambled by the scrambling apparatus to restore the video data to the original unscrambled state.
    • 加扰装置具有以下处理单元中的至少一个:信号插入处理器,用于将指示量化宽度的虚拟图案插入压缩视频数据中; 转换处理器,用于对指定是使用字段还是帧处理的信号进行加扰; DCT系数转换处理器,用于对定义DCT系数的代码的一部分进行加扰; 用于对所述DC内精度信号进行加扰的DC-DC精度转换处理器; 以及用于对交替扫描信号进行加扰的交替扫描转换处理器。 解扰装置对由加扰装置加扰的视频数据进行转换处理,将视频数据恢复到原来的未加扰状态。
    • 10. 发明授权
    • Memory controller for identifying the last valid page/segment in a physical block of a flash memory
    • 用于识别闪存的物理块中的最后一个有效页/段的存储器控​​制器
    • US08006030B2
    • 2011-08-23
    • US11667477
    • 2006-09-20
    • Seiji NakamuraHirokazu Sou
    • Seiji NakamuraHirokazu Sou
    • G06F13/00
    • G06F11/1441G06F11/1068G06F12/0246G06F2212/7209G11C2029/0411
    • Data is written in data areas (202) and information for correcting an error of the data and status information indicating that the data has been written are written in redundant areas (203) sequentially from the first page of a physical block (201). In the step of creating information to be written in the physical block (201), the redundant areas (203) of the pages are subjected to a binary search to temporarily identify a last valid page. Further, the contents of every area (the data areas and the redundant areas) of the temporarily identified last valid page and a page adjacent to the temporarily identified last valid page are checked to finally identify the last valid page and make a judgment as to whether or not an error page resulting from power-down exists.
    • 数据被写入数据区域(202),并且从物理块(201)的第一页顺序地将冗余区域(203)写入用于校正数据错误的信息和表示数据被写入的状态信息的信息。 在创建要写入物理块(201)的信息的步骤中,页面的冗余区域(203)经受二进制搜索以临时识别最后的有效页面。 此外,检查临时确定的最后一个有效页面的每个区域(数据区域和冗余区域)的内容以及与临时确定的最后一个有效页面相邻的页面,以最终识别最后一个有效页面,并判断是否 或不存在由断电产生的错误页面。