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

Trieu-Kien Truong; Shi-Huang Chen

doi:10.1117/12.476581

7 May 2003 Subtitle enhancement in MPEG-4 for very low bit rate streaming video

Trieu-Kien Truong, Shi-Huang Chen

Proceedings Volume 5022, Image and Video Communications and Processing 2003; (2003) https://doi.org/10.1117/12.476581
Event: Electronic Imaging 2003, 2003, Santa Clara, CA, United States

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.

Citation Download Citation

Trieu-Kien Truong and Shi-Huang Chen "Subtitle enhancement in MPEG-4 for very low bit rate streaming video", Proc. SPIE 5022, Image and Video Communications and Processing 2003, (7 May 2003); https://doi.org/10.1117/12.476581

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KEYWORDS

Video

Video processing

Binary data

Electronic imaging

Image processing

RF communications

Video coding

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