Low-Complexity Encoding in Block-Based Hybrid Video Codecs by Moving Motion Estimation to Decoder Side

In this paper the authors present an approach to provide efficient low-complexity encoding for the block-based video coding scheme. The authors present a method based on removing the most time-consuming task, that is motion estimation, from the encoder. Instead the decoder will perform motion prediction based on the available decoded frame and send the predicted motion vectors to the encoder. The results presented are based on a modified H.264 implementation. The results show that this approach can provide rather good coding efficiency even for relatively high network delays.

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A Hierarchical Motion Estimation Based on the Properties of Motion Vectors for Low Complexity in Video Coding

Lecture Notes in Electrical Engineering - Advanced Multimedia and Ubiquitous Engineering ◽

10.1007/978-981-10-5041-1_53 ◽

2017 ◽

pp. 314-320

Author(s):

Hyo-Sun Yoon ◽

Mi-Young Kim

Keyword(s):

Motion Estimation ◽

Video Coding ◽

Low Complexity ◽

Motion Vectors

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Performance Scalable Motion Estimation for Video Coding

Multimedia Networking and Coding ◽

10.4018/978-1-4666-2660-7.ch003 ◽

2013 ◽

pp. 50-75

Author(s):

Golam Sorwar ◽

Manzur Murshed

Keyword(s):

Motion Estimation ◽

Video Coding ◽

Scalable Video Coding ◽

Rate Distortion ◽

Low Complexity ◽

Handheld Devices ◽

Future Research ◽

Image Capturing ◽

Block Based ◽

Motion Search

Motion estimation is one of the major bottlenecks in real-time performance scalable video coding applications due to high computational complexity of exhaustive search. To address this, researchers so far focused on low-complexity motion estimation and rate-distortion optimization in isolation. Proliferation of power-constrained handheld devices with image capturing capability has created demand for much smarter approach where motion estimation is integrated with rate control such that rate-distortion-complexity optimization can be effectively achieved. It is indeed crucial to provide such performance scalability in motion estimation to facilitate complexity management in such devices. This chapter presents an overview of motion estimation. Beginning with an introduction to the importance of motion estimation, it systematically examines various motion estimation techniques and their strengths and weaknesses, focussing primarily on block-based motion search. It then examines the limitation of the existing techniques in accommodating performance scalability, introduces a promising approach, Distance-dependent Thresholding Search (DTS) motion search, to fill in this gap, and concludes with future research directions in the field. The authors suggest that the content of the chapter will make a significant contribution and serve as a reference for multimedia signal processing research at postgraduate level.

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