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Proceedings Paper

Subtitle enhancement in MPEG-4 for very low bit rate streaming video
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Paper Abstract

This paper develops a bit-plane coding technique to achieve the subtitle enhancement in MPEG-4 for very low bit rate streaming video. The original video frame that contains subtitle information is encoded by the use of MPEG-4 codec and then the MPEG-4 decoded Y frame is subtracted from the original one to generate a residue. Because the subtitle information usually appears on the special region of a video frame, one can pre-set the position of the subtitle region and just process this residue subtitle region for subtitle enhancement. The pixel value of the residue subtitle region will be transferred from decimal number to binary number. Thus one can obtain 8 bit-planes of the residue subtitle region. For each bit-plane, (RUN, EOP) symbols are formed and then encoded via the variable length coding to produce the output bitstream. It has been shown that such a bit-plane coding technique is very efficient and its decoding procedure can be easily performed. From various experimental results, using MSB, MSB-1 and MSB-2 planes can obtain a satisfied subtitle visual enhancement with only increasing 5% bit rate.

Paper Details

Date Published: 7 May 2003
PDF: 9 pages
Proc. SPIE 5022, Image and Video Communications and Processing 2003, (7 May 2003); doi: 10.1117/12.476581
Show Author Affiliations
Trieu-Kien Truong, I-Shou Univ. (Taiwan)
Shi-Huang Chen, I-Shou Univ. (Taiwan)

Published in SPIE Proceedings Vol. 5022:
Image and Video Communications and Processing 2003
Bhaskaran Vasudev; T. Russell Hsing; Andrew G. Tescher; Touradj Ebrahimi, Editor(s)

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