Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Fast thumbnail generation for MPEG video by using a multiple-symbol lookup table

Authors
Kim, MyounghoonLee, HoonjaeYoon, Ja-CheonKim, HyeokmanSull, Sanghoon
Issue Date
Mar-2009
Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
Keywords
Dc image; lookup table; MPEG-2; multiple-symbol lookup table
Citation
OPTICAL ENGINEERING, v.48, no.3
Indexed
SCIE
SCOPUS
Journal Title
OPTICAL ENGINEERING
Volume
48
Number
3
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/120456
DOI
10.1117/1.3099718
ISSN
0091-3286
Abstract
A novel method using a multiple-symbol lookup table (mLUT) is proposed to fast-skip the ac coefficients (codewords) not needed to construct a dc image from MPEG-1/2 video streams, resulting in fast thumbnail generation. For MPEG-1/2 video streams, thumbnail generation schemes usually extract dc images directly in a compressed domain where a dc image is constructed using a dc coefficient and a few ac coefficients from among the discrete cosine transform (DCT) coefficients. However, it is required that all codewords for DCT coefficients should be fully decoded whether they are needed or not in generating a dc image, since the bit length of a codeword coded with variable-length coding (VLC) cannot be determined until the previous VLC codeword has been decoded. Thus, a method using a mLUT designed for fast-skipping unnecessary DCT coefficients to construct a dc image is proposed, resulting in a significantly reduced number of table lookups (LUT count) for variable-length decoding of codewords. Experimental results show that the proposed method significantly improves the performance by reducing the LUT count by 50%. (C) 2009 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3099718]
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Engineering > School of Electrical Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Sull, Sang hoon photo

Sull, Sang hoon
College of Engineering (School of Electrical Engineering)
Read more

Altmetrics

Total Views & Downloads

BROWSE