Converged communication system of satellite network and terrestrial network system and dynamic voice code conversion method

Abstract

The invention discloses a converged communication system of satellite networks and ground network systems and a dynamic acoustic code conversion method. The system comprises a satellite, a plurality of satellite users, a plurality of satellite earth stations and a plurality of ground network systems, wherein each satellite earth station comprises a media resource control module and a media resource processing module, each media resource control module comprises an encoding and decoding negotiation signal processing module to provide an encoding and decoding negotiation signal processing function and perform negotiations on speech encoding and decoding modes through out-of-band call control signals during call establishment, and each media resource processing module comprises a vocoder adopting a pooling technology and is used for achieving encoding and decoding format conversion of speech flows. According to the converged communication system, the encoding and decoding negotiation signal processing modules and the vocoders are configured in the satellite earth stations, so that the negotiations on the speech encoding and decoding modes through the out-of-band call control signals during call establishment are achieved, the number of times of speech encoding and decoding is reduced, and the speech quality is improved.

Description

technical field [0001] The invention relates to the field of satellite communication network, in particular to a fusion communication system of satellite network and ground network system and a dynamic voice code conversion method. Background technique [0002] The satellite communication system can provide global / regional coverage and is less affected by the geographical environment. In the case of poor communication conditions and damage to the ground communication network, the satellite communication system can effectively make up for the shortcomings of traditional communication methods. Therefore, integrating the satellite communication network with the ground communication network to form an integrated space-ground communication network can effectively guarantee the transmission of information. [0003] figure 1 It is a structural diagram of an air-ground integrated communication network in the prior art, such as figure 1 As shown, in the case of the integration of t...

AI Technical Summary

Problems solved by technology

[0006] Since different voice codec formats may be used between ground networks and between ground networks and satellite networks, in the existing network, two or more codecs may be required in the communication process of the above two cases. Decoding conversion, because the speech codec is a lossy compression for speech coding, each codec will cause voice delay and voice quality damage, that is, each codec conversion will cause the loss of voice signals and reduce the communication quality

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