Abstract
The paper presents a significantly fast INTRA mode and direction prediction algorithm for MPEG-2 to H.264/AVC time sensitive transcoders for mobile applications. The mode and direction prediction in H.264/AVC encoder is responsible for a huge portion of the delay in the transcoder. An efficient transcoder would take advantage of the information stored in MPEG-2 bitstream (i.e. DCT coefficients) to simplify the IN-TRA prediction in H.264/AVC. Based on the spatial activity analysis using a smoothness determining factor and an edge orientation detector, an early mode decision technique and an INTRA direction prediction for each mode are proposed. The proposed algorithm utilizes the DCT coefficients of the MPEG-2 to eliminate redundant operations in the H.264/AVC encoder part of the transcoder. The Experimental results; using frames with different resolution; show 92% transcoding time elimination at slight PSNR degradation (less than 3.5%) compared with the conventional transcoder.
| Original language | English (US) |
|---|---|
| Title of host publication | 2011 IEEE Workshop on Signal Processing Systems, SiPS 2011, Proceedings |
| Pages | 78-83 |
| Number of pages | 6 |
| DOIs | |
| State | Published - 2011 |
| Event | 2011 IEEE Workshop on Signal Processing Systems, SiPS 2011 - Beirut, Lebanon Duration: Oct 4 2011 → Oct 7 2011 |
Other
| Other | 2011 IEEE Workshop on Signal Processing Systems, SiPS 2011 |
|---|---|
| Country | Lebanon |
| City | Beirut |
| Period | 10/4/11 → 10/7/11 |
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All Science Journal Classification (ASJC) codes
- Signal Processing
Cite this
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High speed intra mode and direction prediction for MPEG-2 to H.264/AVC realtime transcoder. / Elarabi, Tarek A.; Ragab, Ahmed M.; Mahmoud, Hanan; Bayoumi, Magdy.
2011 IEEE Workshop on Signal Processing Systems, SiPS 2011, Proceedings. 2011. p. 78-83 6088953.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - High speed intra mode and direction prediction for MPEG-2 to H.264/AVC realtime transcoder
AU - Elarabi, Tarek A.
AU - Ragab, Ahmed M.
AU - Mahmoud, Hanan
AU - Bayoumi, Magdy
PY - 2011
Y1 - 2011
N2 - The paper presents a significantly fast INTRA mode and direction prediction algorithm for MPEG-2 to H.264/AVC time sensitive transcoders for mobile applications. The mode and direction prediction in H.264/AVC encoder is responsible for a huge portion of the delay in the transcoder. An efficient transcoder would take advantage of the information stored in MPEG-2 bitstream (i.e. DCT coefficients) to simplify the IN-TRA prediction in H.264/AVC. Based on the spatial activity analysis using a smoothness determining factor and an edge orientation detector, an early mode decision technique and an INTRA direction prediction for each mode are proposed. The proposed algorithm utilizes the DCT coefficients of the MPEG-2 to eliminate redundant operations in the H.264/AVC encoder part of the transcoder. The Experimental results; using frames with different resolution; show 92% transcoding time elimination at slight PSNR degradation (less than 3.5%) compared with the conventional transcoder.
AB - The paper presents a significantly fast INTRA mode and direction prediction algorithm for MPEG-2 to H.264/AVC time sensitive transcoders for mobile applications. The mode and direction prediction in H.264/AVC encoder is responsible for a huge portion of the delay in the transcoder. An efficient transcoder would take advantage of the information stored in MPEG-2 bitstream (i.e. DCT coefficients) to simplify the IN-TRA prediction in H.264/AVC. Based on the spatial activity analysis using a smoothness determining factor and an edge orientation detector, an early mode decision technique and an INTRA direction prediction for each mode are proposed. The proposed algorithm utilizes the DCT coefficients of the MPEG-2 to eliminate redundant operations in the H.264/AVC encoder part of the transcoder. The Experimental results; using frames with different resolution; show 92% transcoding time elimination at slight PSNR degradation (less than 3.5%) compared with the conventional transcoder.
UR - http://www.scopus.com/inward/record.url?scp=84055183569&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84055183569&partnerID=8YFLogxK
U2 - 10.1109/SiPS.2011.6088953
DO - 10.1109/SiPS.2011.6088953
M3 - Conference contribution
SN - 9781457719219
SP - 78
EP - 83
BT - 2011 IEEE Workshop on Signal Processing Systems, SiPS 2011, Proceedings
ER -