Multi-channel fusion and mixed data transmission system and method of high-speed video circuit

Abstract

The invention discloses a multi-channel fusion and mixed data transmission system and method of a high-speed video circuit. The system comprises a high-speed serial data receiving module, a mixed datasynthesis module and a channel data fusion module; wherein the high-speed serial data receiving module receives multiple paths of serial digital signals sent by a focal plane circuit and performs serial-parallel conversion to obtain multiple paths of parallel digital signals; the mixed data synthesis module receives the multiple paths of parallel digital signals, intercepts effective pixel digitalizing bits of the multiple paths of parallel digital signals, and performs re-encoding to obtain multiple paths of mixed digital signals; and the channel data fusion module receives the multiple paths of mixed digital signals, adds auxiliary data according to a data transmission format, performs sorting and channel fusion to obtain a path of digital signals. By adoption of the multi-channel fusion and mixed data transmission system and method, the error codes in the digital transmission are reduced, the image SNR and the data transmission efficiency are improved, the scale of the circuit is reduced, and the resource utilization ratio is improved.

Description

technical field [0001] The invention belongs to the technical field of aerospace remote sensing camera video electronics, and in particular relates to a high-speed video circuit multi-channel fusion and data mixing transmission system and method. Background technique [0002] With the development of space detection technology, remote sensing cameras are developing in the direction of high resolution, multi-spectrum, and wide coverage. Many satellite resources. Especially in systems that use CCD / CMOS high-speed image sensors for image acquisition, a large amount of transmitted data and multiple channels are one of the main conditions that limit the development of high-speed, miniaturized, and integrated remote sensing cameras. [0003] The video circuit system in the aerospace remote sensing camera mainly includes three parts: focal plane circuit, signal processing circuit and integration time circuit. The function of the focal plane circuit is to drive the CCD to output an...

AI Technical Summary

Problems solved by technology

If the number of channels of the analog signal output by one CCD is relatively large, or a signal processing circuit needs to process data of multiple CCDs at the same time, then the required AD sampling circuits will also increase, which will increase the circuit scale and reduce resource utilization; CCD image data The effective number of transmission bits is usually 11bit, 12bit, while the high-speed image transmission chip generally adopts 16bit transmission, so the transmission efficiency is reduced to a certain extent; the focal plane analog signal under the above-mentioned circuit topology is transmitted by a copper-axis cable, and the cable The length limits the transmission quality of the analog signal and introduces unwanted noise

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