Name
Abstract | ||
|---|---|---|
This paper presents a new MPEG-4/H.263 rate control scheme. It is applicable to constant-bit-rate transmissions containing equal-interval I-frames. Conventional schemes usually allocate bits equally to each P-frame, resulting in large video quality variations. In this work, in order to smooth quality variations, we allocate bits unequally to each P-frame by its encoding complexity and buffer level. In macroblock (MB) layer, rate-distortion model is usually employed to determine MB QP, but it needs complex floating-point computations. So, instead, we design a simple and effective look-up table, which also relates MB QP, SAD and the texture bit counts. With certain improvements, our table size reduces to only 1/20 of that in reference work, while the scheme still performs well. Experimental results show that, compared with a modified TMN8 rate control scheme, our scheme achieves higher PSNR and smoother PSNR variations, retaining the bit rate proximity and buffer regulation. |
Year | DOI | Venue |
|---|---|---|
2006 | 10.1007/11949534_78 | PSIVT |
Keywords | Field | DocType |
conventional scheme,mb qp,buffer regulation,video coding,large video quality variation,low-memory-cost look-up table,bit rate proximity,tmn8 rate control scheme,effective look-up table,h.263 rate control scheme,higher psnr,buffer level,video quality,floating point,constant bit rate,look up table | Lookup table,Computer graphics (images),Floating point,Computer science,Image quality,Artificial intelligence,Video quality,Rate–distortion theory,Macroblock,Pattern recognition,Algorithm,Image compression,Encoding (memory) | Conference |
Volume | ISSN | ISBN |
4319 | 0302-9743 | 3-540-68297-X |
Citations | PageRank | References |
0 | 0.34 | 7 |
Authors | ||
5 | ||