Trellis-based R-D optimal quantization in H.263+

Authors
Wen, JT Luttrell, M Villasenor, J
Citation
Jt. Wen et al., Trellis-based R-D optimal quantization in H.263+, IEEE IM PR, 9(8), 2000, pp. 1431-1434
Citations number
11
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
IEEE TRANSACTIONS ON IMAGE PROCESSING
ISSN journal
10577149 → ACNP
Volume
9
Issue
8
Year of publication
2000
Pages
1431 - 1434
Database
ISI
SICI code
1057-7149(200008)9:8<1431:TROQIH>2.0.ZU;2-N
Abstract
We describe a trellis-based algorithm which enables R-D optimum quantizatio n decisions in the H.263+ video coding standard. The algorithm allows the q uantization decisions for all coefficients in a block to be made jointly, a nd experiments conducted using H.263+ for video coding rates of 40-50 kbps show an average improvement of 3.5% in bitrate relative to implementations which Follow the International Telecommunications Union (ITU) Test Model sp ecifications in making quantization decisions.