Spatio-Temporal Video Transcoder for Streaming over Mobile Communications Networks

Jae-Won KIM
Goo-Rak KWON
June-Sok LEE
Nam-Hyeong KIM
Sung-Jea KO

IEICE TRANSACTIONS on Communications   Vol.E89-B    No.10    pp.2678-2686
Publication Date: 2006/10/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.10.2678
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Mobile Multimedia Communications)
transcoder,  transcoding,  refinement,  downsizing,  frame-skipping,  streaming,  

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Video transcoding technique is an efficient mechanism to deliver visual contents to a variety of users who have different network conditions or terminal devices with different display capabilities. In this paper, we propose two types of transcoding methods for adapting the bitrate of streaming video to the bandwidth of the transmission channel; spatial resolution reduction (SRR) transcoding and temporal resolution reduction (TRR) transcoding. The two transcoding methods are alternatively operated according to the requirements of users. Experimental results show that the proposed transcoding methods can preserve image quality while transcoding to the low bitrate.