Novel skip motion estimation for efficient inter coding in HEVC
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Novel skip motion estimation for efficient inter coding in HEVC Jin Young Lee 1 Received: 13 March 2020 / Revised: 6 August 2020 / Accepted: 17 September 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract
Video coding is necessary to transmit large amounts of video information. HEVC, which is the latest video coding standard, includes many advanced tools to achieve higher coding efficiency than previous standards, such as MPEG-1/2/4 and H.264/AVC. In particular, new techniques in inter prediction, such as skip, merge, and advanced motion vector prediction (AMVP) modes, drastically improve coding performance by reducing temporal redundancies between consecutive frames within a video. However, the skip mode, which does not perform a motion estimation, can deteriorate the coding performance, because of inaccurate motion vector prediction in videos with fast and complex motions. In order to solve this problem, a novel skip motion estimation method is proposed for efficient inter coding in HEVC. Unlike the conventional skip mode, the proposed skip mode performs the motion estimation, and then transmits the associated motion information. Experimental results demonstrate that the proposed method achieves the high coding performance with the low decoding complexity. Keywords HEVC . Motion estimation . Skip mode . Inter coding
1 Introduction Video information is usually big data that needs large storage spaces. In order to capture, store, and transmit large amounts of video information, both a sufficient bandwidth and an abundant storage capacity are essential, but they are generally limited in real world. Video sensor networks are video communication infrastructures [23], and employ various video coding standards, such as H.264/AVC [11, 26] and HEVC [12, 24]. To overcome the limited bandwidth and storage capacity in the networks, the video coding efficiency should be high, and its computational complexity should be also practical.
* Jin Young Lee [email protected]
1
School of Intelligent Mechatronics Engineering, Sejong University, Seoul, South Korea
Multimedia Tools and Applications
With increasing demand of high-definition (HD) video contents, a new video coding standard that exceeds the coding performance of H.264/AVC was strongly required in video markets. To transmit the HD videos in an insufficient bandwidth, HEVC was developed by Joint Collaborative Team on Video Coding (JCT-VC), which was established by ITU-T Video Coding Experts Group (VCEG) and ISO/IEC Moving Picture Experts Group (MPEG). It adopted lots of techniques to improve coding performance, such as quadtree-based block partitioning, advanced motion vector prediction (AMVP), and sample adaptive optimization (SAO) [24]. Thanks to the advanced tools, the coding performance of HEVC is significantly higher than that of H.264/AVC [18]. Furthermore, it supports higher image size and quality, so it is widely being used in many electronic devices, such as smart phones and digital TVs. HEVC presents a new coding parti
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