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Patent

Voice connection method and device based on VOIP (Voice Over Internet Protocol)

Chen Wenxiang
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TLDR
In this paper, a VOIP (Voice Over Internet Protocol) based device based on a high-pass platform for voice communication is described, in which a function of voice communications is integrated to the AT command of the communication module to be provided for the user to use directly, and meanwhile, voice sampling utilizes the EVRC data with less data to transmit, so that the voice communication more convenient.
Abstract: 
The invention discloses a voice connection method and device based on a VOIP (Voice Over Internet Protocol) The method comprises the following steps of receiving a server connection command which is initiated by a user CPU (Central Processing Unit) through an AT (Attention) command; establishing a TCP (Transmission Control Protocol) connection used for sending the command or calling and called information and a UDP (User Datagram Protocol) connection used for sending or receiving voice data; sending a calling command to the server through the TCP or receiving called information of the server through a TCP; periodically converting recorded analog voice to EVRC (Enhanced Variable Rate Codec) audio data and sending the EVRC audio data to the server through a UDP; or receiving the EVRC audio data sent by the server through the UDP, decoding the EVRC audio data and converting and outputting the analog voice According to the voice connection method and device based on the VOIP, voice communication is realized on a communication module of a high-pass platform through adopting an EVRC encoding technology, a function of voice communication is integrated to the AT command of the communication module to be provided for the user to use directly, and meanwhile, voice sampling utilizes the EVRC data with less data to transmit, so that the voice communication is more convenient

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References
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