Video delivery over cellular wireless networks using EBR techniques

We propose a scheme for efficient transport of video over wireless networks using a novel rate control scheme. The explicit bit rate (EBR) control specifies the use of a variable rate channel and provides an adaptively varying requisite bandwidth to carry varying video encoded output. Due to the use of prediction and variable length codes (VLC) for video codecs, variable-bit-rate (VBR) encoding is considered logical in all advanced video encoders, such as H.263 and H.264. The VBR method of rate control which is currently employed in 3G networks requires the use of a constant bit rate (CBR) physical channel to carry video transmissions to ensure a fixed bandwidth channel to the user during a video call. However, a constant bit rate channel can result in delivering video frames in unequal time intervals, delays in transmission and poor video quality at the end user. We show the application of an explicit bit rate (EBR) control mechanism for high efficiency and quality video transmission for both cdma2000 1x and WCDMA wireless networks.