Efficient video transcoding technique for QoS-based home gateway service

Jae Won Kim, Goo Rak Kwon, Nam Hyeong Kim, Aldo Morales, Sung Jea Ko

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The home gateway integrates heterogeneous home network environments and interconnects the home network and the public access networks. It is natural that users want to see the visual contents on the home network from outside the home. However, there exist significant differences in network capability and computing power of users. 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 an efficient video transcoding technique as the key component of the home gateway architecture. It consists of two types of transcoding methods for adapting the bitrate of streaming video to the bandwidth of the transmission channel; spatial resolution reduction transcoding and temporal resolution eduction transcoding. The two transcoding methods are alternatively or simultaneously 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.

Original languageEnglish (US)
Pages (from-to)129-137
Number of pages9
JournalIEEE Transactions on Consumer Electronics
Issue number1
StatePublished - Feb 2006

All Science Journal Classification (ASJC) codes

  • Media Technology
  • Electrical and Electronic Engineering


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