With the theory of wavelet transform and reversible integer - to - integer wavelet transforms based on shifting frame used in image / video compression field introduced , a new real - time implement of speck algorithm using dsp chip is provided . then the technology of motion estimation and motion compensation is discussed and an adaptive technique for the wavelet video codec to reduce the " block artifact " is presented . and the implement of the wavelet video compression system using adv611 chip is discussed next with the performance emulation result 在系统讨论了小波理论在图像视频压缩编码领域的应用后,结合dsp技术提出一种基于dsp应用的实时低存储需求的改进speck图像编码器;随后探讨基于小波变换的实时视频编码器的实现,在论述运动估计与补偿技术的基础上,针对应用空域运动估计补偿技术的低比特率小波视频编码器提出一种自适应消除块效应的技术;并讨论了基于adv611芯片的视频压缩系统的压缩性能;最后提出一种基于dsp平台具有极低时延的小波视频混合编码方案,对该方案的压缩性能进行了讨论并给出初步的硬件实现方案。
Combining fuzzy t - s model and adaptive fuzzy logic systems , this paper presents an observer - based fuzzy adaptive control scheme for complex nonlinear systems . meanwhile , the fuzzy adaptive technique , the robust control technique and the differential - geometry - based feedback linearization theory are synthesized organically , this paper presents an adaptive fuzzy tracking control scheme for complex nonlinear systems . finally , a fuzzy reconfigurable control scheme is presented for complex nonlinear systems 文中将模糊t - s模型和自适应模糊逻辑系统有机结合,提出了一套比较实用的基于观测器的复杂非线性系统的模糊自适应控制方案;同时,将模糊自适应技术、鲁棒控制技术和微分几何反馈线性化理论结合起来,提出了一种复杂非线性系统的自适应模糊跟踪控制方案;最后,针对复杂非线性系统,给出了一种模糊重构控制方案。
In practical studies , finally , a hybrid active power filter based on the digital signal processor ( dsp ) and intelligent power module ( ipm ) was set up , including a cycloconverter acem . based on the experimental set - up , plenty of experimental studies were conducted . the experimental results demonstrate that the self - adaptive technique , the topology of series connected hybrid power filter and the corresponding significant technologies described above are feasible and practical 最后,实际研制了一套以dsp (高速数字信号处理器)和ipm (智能功率模块)为核心的小功率混合型有源滤波装置,在交交变频acem实验平台上进行了全面的实验研究,充分验证了本文所提出的自适应同步相关滤波技术、优化混合型滤波器拓扑结构和有关的关键性技术的正确性和实用性,从而从理论到实践全方位、成功地实现了对交流励磁发电机输出电力谐波抑制的研究。
In frequency domain , we research dct based information hiding techniques , and then give an adaptive technique , and a parity based approach in the dct domain , and an approach based on improved integration algorithm . we also propose an approach based on difference matrix in dct domain , and show all the approaches to embed / detect the secret messages , and their robust analysises 在频率域内,研究了基于dct变换的信息隐藏技术,提出了改进的dct自适应隐藏算法、 dct域奇偶性嵌入方法和改进的融合算法,同时提出了差值矩阵的dct域的隐藏算法,给出了这些算法的信息嵌入与恢复过程,并对频率域内的这些隐藏算法的鲁棒性进行了分析。
Meanwhile , in order to overcome the disadvantage of the fuzzy adaptive technique for researching mimo nonlinear systems with multiple time delays , an adaptive fuzzy tracking control scheme for nonlinear systems with multiple time delays is presented . in this paper , a kind of adaptive time - delay fuzzy logic systems is constructed and used to approximate the unknown functions with multiple time delays 同时,为了弥补模糊自适应技术研究多输入多输出多重时延非线性系统的不足,文中构建了一种自适应时延模糊逻辑系统来逼近时延函数并对非线性系统建模,提出了一种非线性多重时延系统的跟踪控制方案。