Transcoding of video into different encoding formats

Author

Shanableh, T. ; Ghanbari, M.

Author_Institution

Dept. of Electron. Syst. Eng., Essen Univ., Germany

Volume

6

fYear

2000

fDate

2000

Firstpage

1927

Abstract

In this paper, transcoding of pre-encoded MPEG-1,2 video into lower bit rates is realized through altering the coding algorithm into H.261/H.263 standards with lower spatial resolutions. We extract and compose a set of candidate motion vectors, from the incoming bit stream, to comply with the encoding format of the output bit stream. For the spatial resolution reduction, we generate one motion vector out of a set of input motion vectors operating on the higher spatial resolution image. We discuss the impact of motion estimation refinement on the new motion vectors and show that for all cases a simple half-pixel refinement is sufficient for near-optimum results

Keywords

code standards; image resolution; motion estimation; telecommunication standards; video coding; H.261 standard; H.263 standard; coding algorithm; encoding formats; half-pixel refinement; motion estimation refinement; motion vectors; near-optimum results; output bit stream; pre-encoded MPEG-1 video; pre-encoded MPEG-2 video; spatial resolution; spatial resolution reduction; video transcoding; Bit rate; Decoding; Encoding; Motion estimation; Nonhomogeneous media; Quality of service; Spatial resolution; Streaming media; Transcoding; Video compression;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on

Conference_Location

Istanbul

ISSN

1520-6149

Print_ISBN

0-7803-6293-4

Type

conf

DOI

10.1109/ICASSP.2000.859206

Filename

859206