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    • 13. 发明申请
    • CODING DEVICE AND METHOD WITH RECONFIGURABLE AND SCALABLE ENCRYPTION/DECRYPTION MODULES
    • 具有可重构和可扩展加密/分解模块的编码设备和方法
    • US20100278338A1
    • 2010-11-04
    • US12435349
    • 2009-05-04
    • Yu-Lin ChangWensheng Zhou
    • Yu-Lin ChangWensheng Zhou
    • H04N7/167H04L9/28G06F21/00
    • G09C1/00H04L9/0662H04L9/16H04L2209/12H04L2209/60
    • A reconfigurable and scalable cryptography (encryption/decryption) system architecture and related method are described. The system utilizes a multiple-pass approach, each pass applying one cryptography algorithm with its own cryptography keys. The encrypted data can only be fully and correctly decrypted with the correct algorithms in the correct sequence (as determined by one or more security level parameters) and the correct cryptography keys. The system includes a multiple cryptography algorithm set section which is reconfigurable to perform multiple cryptography algorithms sequentially, and a cryptography controller which receives an input key set and a security level parameter. The cryptography controller reconfigures the multiple cryptography algorithm set section based on the security level parameter to perform multiple selected cryptography algorithms in a selected sequence. The cryptography controller also generates cryptography keys based on the input key set and provide the cryptography keys to the multiple cryptography algorithm set section.
    • 描述了可重构和可扩展的加密(加密/解密)系统架构及相关方法。 该系统利用多遍方法,每次通过使用一个加密算法与其自己的加密密钥。 加密数据只能以正确的算法以正确的顺序(由一个或多个安全级别参数确定)和正确的加密密钥完全正确地解密。 该系统包括可重新配置以依次执行多个加密算法的多密码算法集部分,以及接收输入密钥集和安全级别参数的密码控制器。 密码学控制器基于安全级别参数重新配置多密码算法集段,以选择的顺序执行多个选择的加密算法。 加密控制器还基于输入密钥集生成加密密钥,并将加密密钥提供给多密码算法集段。
    • 14. 发明授权
    • System and apparatus for integrated video/image encoding/decoding and encryption/decryption
    • 用于集成视频/图像编码/解码和加密/解密的系统和装置
    • US08660261B2
    • 2014-02-25
    • US12478182
    • 2009-06-04
    • Yu-Lin ChangWensheng Zhou
    • Yu-Lin ChangWensheng Zhou
    • H04L9/00
    • H04N7/1675H04N19/93H04N21/2347
    • An encryption-enabled entropy coder for a multimedia codec is disclosed. The entropy coder implements a randomized Huffman coding scheme without storing multiple sets of Huffman tables in a ROM. The entropy coder includes a ROM storing a single set of code tables, a table lookup section coupled to the ROM which converts symbols to original codewords and vice versa by performing table lookup, and a table randomizer section for converting original Huffman codewords to randomized Huffman codewords and vice versa using an isomorphic code generator algorithm. The table randomizer section performs the conversion based on a key hopping sequence generated by a pseudorandom bit generator using an encryption/decryption key.
    • 公开了一种用于多媒体编解码器的加密功能熵编码器。 熵编码器实现随机Huffman编码方案,而不在ROM中存储多组霍夫曼表。 熵编码器包括存储单个代码表集的ROM,耦合到ROM的表查找部分,其通过执行表查找将符号转换为原始码字,反之亦然;以及表随机化器部分,用于将原始霍夫曼码字转换为随机霍夫曼码字 反之亦然,使用同构码生成算法。 表格随机化器部分基于使用加密/解密密钥的伪随机比特发生器产生的密钥跳频序列进行转换。
    • 18. 发明申请
    • Method and Apparatus of Delta Quantization Parameter Processing for High Efficiency Video Coding
    • 用于高效率视频编码的Delta量化参数处理方法与装置
    • US20120114034A1
    • 2012-05-10
    • US13018431
    • 2011-02-01
    • Yu-Wen HuangChing-Yeh ChenChih-Ming FuChih-Wei HsuYu-Lin ChangTzu-Der ChuangShaw-Min Lei
    • Yu-Wen HuangChing-Yeh ChenChih-Ming FuChih-Wei HsuYu-Lin ChangTzu-Der ChuangShaw-Min Lei
    • H04N7/12
    • H04N19/174H04N19/103H04N19/119H04N19/126H04N19/13H04N19/146H04N19/159H04N19/176H04N19/18H04N19/463H04N19/70H04N19/96
    • In the current high efficiency video coding development, each LCU has its own quantization parameter (QP) and the difference between a current QP and a reference QP is transmitted instead of the QP value itself. Since the LCU is much larger than the macroblock of AVC/H.264, using one delta QP per LCU may cause rate control unable to adapt to the bitrate quickly enough. Consequently there is a need to adopt delta QP in units smaller than LCU to provide more granular rate control. Furthermore, it is desirable to develop a system that is capable of facilitating more flexible delta QP. Accordingly, adaptive quantization parameter processing is disclosed where a QP minimum CU size for incorporating or deriving a delta QP is indicated selectively in the slice level or in the sequence/picture level. In one variation, the delta QP is incorporated or derived only if nonzero quantized transform coefficients exist in a leaf CU that is larger than the QP minimum CU size. In another variation, quantization parameter information is only incorporated or derived when a leaf CU has any nonzero quantized transform coefficient. In yet another variation, a flag is used to indicate whether one delta QP per LCU is transmitted if the LCU has any nonzero quantized transform coefficient or one delta QP per leaf CU is transmitted if the leaf CU has any nonzero quantized transform coefficient.
    • 在当前的高效率视频编码开发中,每个LCU具有其自己的量化参数(QP),并且发送当前QP与参考QP之间的差异而不是QP值本身。 由于LCU比AVC / H.264的宏块大得多,因此使用每个LCU的一个delta QP可能导致速率控制不能足够快地适应比特率。 因此,需要采用小于LCU的单位的delta QP来提供更细粒度的速率控制。 此外,期望开发能够促进更灵活的delta QP的系统。 因此,公开了自适应量化参数处理,其中用于合并或导出增量QP的QP最小CU尺寸在片级或序列/画面级别中有选择地表示。 在一个变型中,只有当非零量化变换系数存在于大于QP最小CU尺寸的叶CU中时,才加入或推导增量QP。 在另一个变型中,当叶CU具有任何非零量化变换系数时,仅结合或导出量化参数信息。 在又一个变型中,如果LCU具有任何非零量化变换系数,或者如果叶CU具有任何非零量化变换系数,则发送每个叶CU,则发送每个LCU一个ΔQP是否被发送的标志。