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Reducing Temporal Redundancy in MJPEG using Zipfian Estimation Techniques

Nguyen, Ngoc Sinh and Bui, Duy Hieu and Tran, Xuan Tu (2014) Reducing Temporal Redundancy in MJPEG using Zipfian Estimation Techniques. In: 2014: the 12th of the biennial IEEE Asia Pacific Conference on Circuits and Systems (IEEE APCCAS 2014), 17-20 November 2014, Okinawa, Japan.

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The bit-rate is the one the most crucial factor in storing and transmitting the digital videos while the complexity plays the most important part in embedded systems.Nowadays, H.264/AVC and newest video advance codec are great in reducing bit-rate. However, these codec have high processing dependencies and complexity. This leads to difficulties in implementing them into the embedded systems, maintaining the real time properties of the system and power consumption problems. Therefore, MJPEG standard is still widely used in the embedded systems even it is inefficient in reducing the bit-rate. In this paper, we improve the quality and the bitrate of the MJPEG codec with low-complexity techniques: temporal compression and encoding residual values in motions. Motion JPEG simply compresses each frame in a video sequence using JPEG still image compression standard. This video codec satisfies power consumption and real-time properties of embedded systems while having very low complexity. However, the downside is its inefficiency in reducing the bit-rate because there are still redundancies between encoded frames. In this paper, we focus on reducing temporal redundancies in MJPEG using a motion detection algorithm, called Zipfian estimation. The Zipfian estimation helps MJPEG extract separately the moving blocks and the stationary blocks then removes temporal redundancies by minimizing encoded bit-stream of stationary blocks and encoding only the residuals of the moving blocks between adjacent frames. Experimental results show that the proposed method can provide twice compression ratio as much as the conventional MJPEG, and an approximate quality and bit-rate as the H.264/AVC (Intra-mode). Even the proposed method uses the Zipfian estimation, it still has smaller number of operations than the conventional MJPEG if the percentage of the static scene is equal or greater than 60%. Compared with the H.264/AVC Intra mode when turning off the rate-distortion optimization, the running time of the proposed method is still only a half.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Outstanding Student Paper Award & Travel Support Grant Award
Subjects: Electronics and Communications
Electronics and Communications > Electronics and Computer Engineering
Divisions: Faculty of Electronics and Telecommunications (FET)
Key Laboratory for Smart Integrated Systems (SISLAB)
Depositing User: Prof. Xuan-Tu Tran
Date Deposited: 29 Dec 2014 04:17
Last Modified: 17 Jan 2017 02:23

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