In this paper, based on the FPGA and with a PAL decoder chip, LVDS coding chip and large capacity SRAM, the design and implementation of a PAL system for analog signals to the LVDS conversion of the video signal interface board. First of all, convert the analog signal of PAL to RGB565 digital video signal, and transform the interlaced scan into progressive scan. Then, through the frame rate conversion, resolution expansion etc. algorithm method to handle. Finally, to achieve the interlaced scanning, a resolution of 720×576, 25Hz PAL analog video signal, is converted to a progressive scan, a resolution of 1024×768, 60Hz LVDS video signal transmission. After the measurement, the resolution and frame rate of the video signal conversion interface board are all meet the design requirements. It has been verified the effectiveness of scheme.
Aiming at the security and reliability of data transmission in a wireless telemetry system, a new error correcting cryptography algorithm is proposed in this paper. The novel algorithm employs quasi-cyclic low-density parity-check (QC-LDPC) codes for simultaneous encryption and channel encoding, which is different from the traditional concatenated systems where encryption and channel encoding perform serially. Thus the proposed cryptosystem exhibits attracting characteristics when it is applied to a telemetry system. The parameters are obtained according to the cryptanalysis and the corresponding key size is estimated from the compact description of the quasi-cyclic matrices. The analysis shows that the proposed error correcting cryptosystem with lower-complexity is more secure than the traditional concatenated system at a price of larger key size which is still acceptable for implementation.
In this paper, based on the FPGA and with a video dedicated A / D converter chip, LVDS coding chip, the design and implementation of a SD(standard-definition) analog video signals to HD(high-definition) digital video signal converter. First, input SD analog video into digital video signals meet the ITU-BT656 standard. Then use the FPGA with the video processing chip and DDR do some corresponding processing to achieve high-definition digital video output. After the actual test, the converter output signal of the image quality is well, meets the design requirements, and to verify the effectiveness of the program.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.