KEYWORDS: Video, Video surveillance, Video processing, Virtual reality, Imaging systems, Data storage, Cameras, Control systems, Intelligence systems, Surveillance
With the needs of the rapid development of society, video surveillance systems are more and more used in all aspects of life, but the current video surveillance systems mostly use PCs as platforms and cameras for long-term uninterrupted recording. This not only consumes high power, but also has poor portability and consumes a huge amount of storage devices. It will also be extremely tedious in the face of complex and massive redundant data when looking back at video to find key information afterwards. Based on virtual reality technology and video processing technology, this paper studies the design of monitoring system. This paper tests and analyzes the designed embedded system. Experiments show that all functional modules of the system work normally, and compared with ordinary video surveillance systems, the output frame rate is good and can reach 25FPS.
KEYWORDS: Digital watermarking, Discrete wavelet transforms, Digital recording, Modulation, Signal detection, Data storage, Wavelets, Signal processing, Particles, Linear filtering
The Internet and digital technology have impacted all traditional content industries, and the music industry is naturally inevitable. Therefore, research on the Internet, music industry, and digital music copyright has become the focus of academic circles in various countries today. The purpose of this paper is to study the application of copyright protection of musical works based on digital audio watermarking algorithm. Firstly, the theoretical basis of digital music copyright and discrete wavelet transform is expounded. The security of the audio watermarking system is improved by using the pure sequence modulation; the watermark is embedded in the double transform domain according to the energy gathering effect of the discrete cosine transform, and finally the blind extraction of the watermark is realized. Finally, the two algorithms are compared and discussed. The experimental results show that, under the same attack conditions, the normalized correlation coefficient between the original watermark and the extracted watermark of the watermarking algorithm based on pure modulation and double transform domain is larger. The advantages of the watermarking algorithm based on mixed pure modulation and double transform domain are analyzed, which makes the application of wavelet transform coding in music copyright information more practical and extensive.
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