摘要：Video communication over wireless networks is an increasing technology in a wide range of important applications. In order to reduce the image data traffic, video compression is general employed in a video codec. There are some video compression standards such as H.263, H.264 and MPEG4. Among these standards, H.264 has more advanced compression methods than the MPEG-4 compression, having significant improvements in coding efficiency, error robustness and network friendliness, meeting the growing demands for video compression application in embedded system. In order to realize wireless communication over short distances in embedded system, Bluetooth and WiFi are two main technologies to choice recently. Bluetooth is reported to be more power competent than WiFi. Video transmission over Bluetooth is still a expensive research ideas. Currently, the Bluetooth v4.2 Specification is released on December 2014. But target at very poor power applications running off a think up cell, which is inapt for wireless video transmission. Bluetooth v3.0+HS (High-Speed) Specification is released on 21 April 2009. It supports theoretical data transfer speeds of up to 24 Mbit/s, of which the high data rate traffic is carried over a collocated 802.11 link and consumes more energy. in embedded system is proposed in the paper. In order to solve the problem that H.264 variable bit rate (VBR) in video transmission is untrustworthy and Bluetooth channel is instable, it adopts store manager (RM) to control video transmission, which analyzes the condition of Bluetooth, and uses a method of traffic credits and a buffer to smooth the video output traffic and to partially eliminate the peaking of the video stream transmitted in Bluetooth channel.
