Title :
A real-time smoothing scheme of MPEG-4 video for CDMA systems
Author :
Jie, Qin ; Bingzhang, Liu ; Xin, Zhang ; Dacheng, Yang
Author_Institution :
Beijing Univ. of Posts & Telecommun.
Abstract :
A real-time smoothing scheme of MEPG-4 video for CDMA systems is proposed in this paper. It is carried out within group of pictures (GOP), using data prediction method to reduce delay, setting the minimum rate based on delay requirement, and choosing transmission rate among CDMA physical layer rate sets. This scheme can considerably reduce the peak rate and variance of the transmitted signal. Simulation results show that with the proposed smoothing scheme, higher system stability and better QoS have been achieved. Moreover, the system performance gain is more considerable when the channel condition is relatively bad
Keywords :
code division multiple access; data compression; prediction theory; quality of service; real-time systems; smoothing methods; video signal processing; wireless channels; CDMA system; GOP; MPEG-4 video; QoS; code division multiple access; data prediction method; group-of-picture; quality-of-service; real-time smoothing scheme; system stability; Delay; MPEG 4 Standard; Multiaccess communication; Performance gain; Physical layer; Prediction methods; Real time systems; Smoothing methods; Stability; System performance;
Conference_Titel :
World of Wireless, Mobile and Multimedia Networks, 2006. WoWMoM 2006. International Symposium on a
Conference_Location :
Buffalo-Niagara Falls, NY
Print_ISBN :
0-7695-2593-8
DOI :
10.1109/WOWMOM.2006.15
