Mendeley
TY  _  JOUR
ID  -  13930805959372808
TI  -  Joint Source and Channel Analysis for Scalable Video Coding Using Vector Quantization over OFDM System
JO  -  Journal of Information Systems and Telecommunication (JIST) 
JA  -  ES
LA  -  en
SN  -  2322-1437
AU  -  Jafarian Farid
AU  -  Farsi Hassan
AD  -  Birjand
AD  -  University of Birjand
Y1  -  2014
PY  -  2014
VL  -  8
IS  -  
SP  -  1
EP  -  10
KW  -  Vector Quantization
KW  -  Joint Source and Channel Coding
KW  -  Video Coding
KW  -  Wireless Channel
KW  -  
KW  -  
KW  -  
KW  -  
DO  -  
N2  -  Conventional wireless video encoders employ variable-length entropy encoding and predictive coding to achieve high compression ratio but these techniques render the extremely sensitive encoded bit-stream to channel errors. To prevent error propagation, it is necessary to employ various additional error correction techniques. In contrast, alternative technique, vector quantization (VQ), which doesn’t use variable-length entropy encoding, have the ability to impede such an error through the use of fix-length code-words. In this paper, we address the problem of analysis of joint source and channel for VQ based scalable video coding (VQ-SVC). We introduce intra-mode VQ-SVC and VQ-3D-DCT SVC, which offer similar compression performance to intra-mode H.264 and 3D-DCT respectively, while offering inherent error resilience. In intra-mode VQ-SVC, 2D-DCT and in VQ-3D-DCT SVC, 3D-DCT is applied on video frames to exploit DCT coefficients then VQ is employed to prepare the codebook of DCT coefficients. In this low bitrate video codecs, high level robustness is needed against the wireless channel fluctuations. To achieve such robustness, we propose and calculate optimal codebook of VQ-SVC and optimal channel code rate using joint source and channel coding (JSCC) technique. Next, the analysis is developed for transmission of video using an OFDM system over multipath Rayleigh fading and AWGN channel. Finally, we report the performance of these schemes to minimize end-to-end distortion over the wireless channel.
UR  - rimag.ir/en/Article/14858
L1  - rimag.ir/en/Article/Download/14858
ER  -  
