The realization of arbitrary downsizing video transcoding

Haiyan Shu, Lap Pui Chau

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)


In order to transmit the precoded bit stream through bandwidth constrained network, transcoding technique has been introduced to reduce the overall bit rate generated. Downsizing transcoding is one of the commonly used methods since it can reach very low bit rate without losing any motion information. Many efforts have been devoted to this research area. With the proposal of arbitrary downsizing, fine gradual reduction of bit rate and video quality becomes feasible. However, there is little research focusing on frame size selection for arbitrary downsizing transcoding. In this letter, the realization of arbitrary downsizing transcoding is discussed. Rate estimation scheme is applied on video sequences to choose the suitable frame size for the target bit rate. An efficient method is proposed to estimate the number of bits allocated to residue in requantization process. Experimental results show that, it can provide an accurate estimation and make a reliable decision in frame size selection.

Original languageEnglish
Pages (from-to)540-546
Number of pages7
JournalIEEE Transactions on Circuits and Systems for Video Technology
Issue number4
Publication statusPublished - Apr 2006
Externally publishedYes


  • Arbitrary downsizing
  • Frame size selection
  • Video transcoding

ASJC Scopus subject areas

  • Media Technology
  • Electrical and Electronic Engineering


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