satellite transmission router

Abstract

A satellite transmission router belongs to the technical field of signal transmission, and especially relates to a satellite transmission router. The invention provides a satellite transmission router which can increase communication capacity, and improve voice quality and communication reliability. The satellite transmission router of the invention comprises a DSP, an FPGA, an SDRAM, a signal transformation portion, a network interface portion, a power supply portion, and a satellite signal interface portion. The structural main points, which are a network interface portion port, a DSP port, an FPGA port, a signal transformation portion port, and the satellite signal interface portion, are successively connected. An SDRAM port is connected with the DSP port. The DSP receives network information inputted by the network interface portion and carries out voice compression on the information, and then outputs the information to the FPGA. The FPGA transforms the voice compressed information into clock signals, information signals, control signals through the signal transformation portion, and then outputs the clock signals, information signals, and control signals to the satellite signal interface portion.

Description

technical field [0001] The invention belongs to the technical field of signal transmission, in particular to a satellite transmission router. Background technique [0002] A router is a device that connects various local area networks and wide area networks. It will automatically select and set routes according to the channel conditions, and send signals in the order of the best path. Due to the particularity of the satellite transmission line, there are higher requirements for the router's communication capacity, voice quality, security and other indicators. In addition, the voice compression method for the router also needs to be improved. [0003] Civil aviation air traffic service is a general term for controllers to use ground-air communication to transmit voice, weather and other information to conduct command, control and guidance of civil aviation aircraft within the jurisdiction. Among them, voice communication is the most important link in the entire civil aviati...

AI Technical Summary

Problems solved by technology

But its main disadvantage is that the quality of synthesized voice is poor, the naturalness is low, and the requirements for the speaking environment are harsh, and it needs to be in a quiet place to have a high intelligibility

Due to the congenital deficiencies of the above two coding methods, people later proposed a hybrid coding method, which is the same as parametric coding, but also uses synthesis and analysis technology, and at the same time uses the waveform information of the speech to enhance the naturalness of the reconstructed speech. The quality of the synthesized voice has been significantly improved, at the cost of an increase in the encoding rate, which is generally between 2.4kb / s and 16kb / s

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