Encoding-scaled MPEG video in compressed domain

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Image and video compression is becoming increasingly popular with the advent of broadband networks, high powered workstations, and compression standards. Visual data are therefore expected to be stored in the compressed format in future image and video databases. Recently, techniques for manipulating the DCT parameters have been proposed in the literature. However, these techniques are not directly applicable to MPEG video due to motion estimation/compensation procedure present in addition to DCT coding. In this paper, we propose a macroblock type selective encoder to implement scalable MPEG video coding using a combined DCT domain scaling operation and a modified DCT domain motion compensation technique. The proposed encoder removes the unnecessary decompression/re-compression and motion estimation procedures, and derives the motion information and DCT coefficients of the prediction errors for the scaled macroblocks for the original motion vectors and DCT coefficients, respectively. Hence, it provides an elegant way to re-encode the scaled video while maintaining a good video quality. In addition, it is compatible with the standard MPEG encoder.

Original languageEnglish (US)
Pages (from-to)983-991
Number of pages9
JournalUnknown Journal
Volume3024
DOIs
StatePublished - 1997
Externally publishedYes

Fingerprint

discrete cosine transform
Motion estimation
Image compression
Encoder
coding
Encoding
Motion Estimation
Motion Picture Experts Group standards
Broadband networks
Motion compensation
Compression
coders
Image coding
Video Databases
Motion Compensation
Video Compression
Motion Vector
Video Quality
Image Database
Video Coding

Keywords

  • DCT domain
  • Inter-coded
  • Intra-coded
  • Motion compensation
  • MPEG

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Encoding-scaled MPEG video in compressed domain. / Hu, Qingwen; Panchanathan, Sethuraman.

In: Unknown Journal, Vol. 3024, 1997, p. 983-991.

Research output: Contribution to journalArticle

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