An Efficient coding algorithm for affine motion parameters

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We describe an efficient method for the coding of the affine motion parameters. Conventional direct quantization method consists of a linear quantizer and an entropy coder. Although this is the easiest way to code affine parameters, it has some problems. First, its implementation requires too many quantizers and entropy code tables. Second, the direct quantization method does not take into account the interrelationship between the parameters. Therefore, it shows much degradation after motion compensation if the bit rates allocated to the parameters for the transmission or the storage are reduced. To overcome these problems, we propose a new method that deduces the real translational motion from the six affine motion parameters, which have more physical meaning and a strong temporal correlation. In addition, the scaling and rotational motion are transformed into 2-D vector elements, and then the vector quantization method is used to code them. Simulation results show that our proposed scheme provides better performance than the conventional direct quantization method. (C) 2001 Society of Photo-Optical Instrumentation Engineers.
Publisher
Spie-Soc Photo-Optical Instrumentation Engineers
Issue Date
2001-01
Language
English
Article Type
Article
Citation

OPTICAL ENGINEERING, v.40, no.2, pp.200 - 208

ISSN
0091-3286
URI
http://hdl.handle.net/10203/82676
Appears in Collection
EE-Journal Papers(저널논문)
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