An effective motion vector re-estimation method for low bit-rate video transcoding

  • Authors:

  • June-Sok Lee;Goo-Rak Kwon;Jae-Won Kim;Nam-Hyeong Kim;Sung-Jea Ko

  • Affiliations:

  • Department of Electronics and Computer Engineering, Korea University, Sungbuk-Ku, Seoul, 136-701, Republic of Korea;Department of Electronics and Computer Engineering, Korea University, Sungbuk-Ku, Seoul, 136-701, Republic of Korea;Department of Electronics and Computer Engineering, Korea University, Sungbuk-Ku, Seoul, 136-701, Republic of Korea;Department of Electronics and Computer Engineering, Korea University, Sungbuk-Ku, Seoul, 136-701, Republic of Korea;Department of Electronics and Computer Engineering, Korea University, Sungbuk-Ku, Seoul, 136-701, Republic of Korea

  • Venue:
  • Real-Time Imaging
  • Year:
  • 2004

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Abstract

For the low bit-rate multimedia communications, video contents have to be transcoded according to the requirements of network bandwidth and the performance of clients. However, transcoding to the low bit-rate creates video quality degradation (drift error) caused by quantization, motion vector truncation, and downsizing. In this paper, we present an effective motion vector re-estimation method to compensate drift errors in the spatial resolution reduction transcoding. Experimental results show that our method can preserve image quality while transcoding to the low bit-rate.