Voice signal transmitting and receiving device and method

Abstract

The invention discloses a voice signal transmitting and receiving device and method. In the device, a coder is used for coding current acquired to-be-transmitted voice signals; a processor is used for classifying the voice signals and / or signals obtained after coding by the coder, and is used for executing corresponding packet loss prevention treatment for the classified voice signals; and a transmitter is used for transmitting the voice signals processed by the coder and the voice signals processed by the processor. According to the technical scheme provided by the invention, the code rate of the voice code stream as well as the occupied bandwidth are lowered, at the same time, the pocket loss prevention ability of the voice signals is maintained, and the user experience is not affected.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a voice signal sending and receiving device and method. Background technique [0002] Real-time multimedia communication based on IP packet network is a hotspot in the research of computer network technology and communication technology, and also conforms to the development direction of "three networks in one" (telephone network, data network, cable TV network) in the future. The biggest advantage of real-time multimedia communication based on IP packet network is that it can make extensive use of the global Internet (Internet) intercommunication environment, and implement voice compression and coding, packet packetization, distribution routing, storage exchange, unpacket decoding and other exchange processing on the IP network. Communication, making full use of existing network resources and reducing the cost of voice services. However, the data transmission of real-time voic...

AI Technical Summary

Problems solved by technology

However, the defect of FEC technology is that: the sender needs to perform FEC calculations, which increases the amount of calculation at the sender; even if the network is in good condition, it is necessary to perform FEC calculations on all voice frame data packets to generate redundant data, and the redundant data will be stored in the Transmission on the network increases the code rate of the voice code stream, wastes network bandwidth, and packet loss caused by congestion will make the network condition worse and increase the packet loss rate

When the receiving end uses FEC technology to restore the lost packets, it needs to receive the unlost packets in the group of data for FEC calculation. If the lost packets are in the front position of the group of data, it needs to wait for all the data packets to be received. Do FEC calculation, which brings additional delay

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