Building a pseudo object-oriented very low bit-rate video coding system from a modified optical flow motion estimation algorithm

In this paper, a pseudo object-oriented video coding system is proposed and implemented. In order to increase the coding efficiency, cache VQ algorithm is suggested to further compress those areas where motion estimation fails. According to our primary simulation results, the visual quality of long-timed sequences is still acceptable even for bit-rates below 10 Kbps. In addition to the high compression ratio for very low bit-rates, content-based applications are also expected since the proposed system utilizes segmented motion field; furthermore, the occurrences of prediction errors generally locate at emotionally important parts, e.g. eyes and mouth, etc. All the coded components are not only useful for compression but also meaningful for video recognition.

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A pseudo-object-oriented very low bit-rate video coding system with cache VQ for detail compensation

Chen

Chiu

et al. 1996

Proceedings of 3rd IEEE International Conference on Image Processing ICIP-96

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The arbitrarily shaped transform of segmented motion field for a pseudo object-oriented very low bit-rate video coding system

Ku¹,

Chiu²,

Chen³

et al.

1996 IEEE International Symposium on Circuits and Systems. Circuits and Systems Connecting the World. ISCAS 96

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T h e arbitrarily shaped transform (AST) of the segmented motion field generated by modified optical flow algorithm (MOFA) is suggested in this paper. Because the transform kernels are dependent on the shape of the coded region, information about t h e contours of the objects must be transmitted. To achieve d a t a compression, coefficient selection function (CSF) is defined for AST coefficients reduction. Since shape information costs lots of d a t a amount, a rectangle approximation method is also developed. According t o the simulation results, the proposed coding method is efficient and its performance is much better than the traditional block matching algorithm no matter in terms of PSNR or bit-rate. In addition, the proposed algorithms are integrated together to build a very low bit-rate video coding system. From some primary simulations of the system, the proposed method can guarantee 34 d B PSNR for most cases at around 10 Kbps; Furthermore, the segmentation of objects is potential for object scalability.

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Building a pseudo object-oriented very low bit-rate video coding system from a modified optical flow motion estimation algorithm

Cited by 2 publications

References 7 publications

A pseudo-object-oriented very low bit-rate video coding system with cache VQ for detail compensation

A pseudo-object-oriented very low bit-rate video coding system with cache VQ for detail compensation

The arbitrarily shaped transform of segmented motion field for a pseudo object-oriented very low bit-rate video coding system

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