Research Of Real-time Audio Transmission On Intelligent Terminal

The rapid development of Internet and wireless communication technologies has enabled people to meet the growing demand for multimedia data.Compared with general text data,the transmission of audio and video information emphasizes real-time performance.At present,there are many solutions for real-time transmission of audio and video between smart phones.However,smart watches are still an important component of intelligent terminals and there is still no mature audio real-time transmission scheme based on them.The research goal of this topic is to complete the real-time transmission collected by smart watch to the mobile phone,and the mobile phone can smoothly play and store the audio in real time.In order to achieve this goal,based on the research of commonly used real-time transmission protocols such as RTP/RTCP,this paper proposes a real-time audio transmission algorithm for intelligent terminal,which is based on UDP protocol for transmission,and the confirmation and retransmission mechanism and buffer management mechanism are added:The receiver periodically feeds back the datagram reception status to the sender and processes the valid data that has not timed out.The sender can retransmit the datagram that is not correctly received,but does not respond to the timeout response.In view of the algorithm above,this paper designed a real-time audio transmission scheme that can be used for intelligent terminals,especially smart watches.By adding serial numbers instead of timestamps to UDP datagrams,the scheme can operate normally even if the time between the watch and the mobile phone is not synchronized.The experiment was carried out on the Samsung Gear S2 watch equipped with the Tizen operating system and an Android phone.After testing,by setting appropriate parameters,the scheme can significantly reduce the packet loss rate of data transmission.The mobile phone can receive more than 99%of the data in real time,and the audio playback is clear and smooth.This result proves that the scheme can take both the real-time and reliability of the transmission into account,and operate steadily and effectively.The scheme proposed in this paper enrich the functions of smart watches,adds a new application scenario for real-time audio transmission and playback,which has important research significance and practical value.