• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2013.06a
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• pp.117-118
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• 2013

본 논문에서는 HEVC (High Efficiency Video Coding) SAO (Sample Adaptive Offset)의 병렬화 성능을 비교한다. HEVC 의 참조 소프트웨어인 HM-10.0 에서는 SAO 수행 과정의 연산량 및 메모리 접근을 최소화하고 카테고리 계산 과정에서 SAO 수행 전의 픽셀값을 사용하기 위해서 라인 버퍼를 사용한다. 그러나 이러한 라인버퍼의 사용은 SAO 에 대해 데이터-레벨의 병렬화를 적용하기 어렵게 만드는 주요 요인이다. 본 논문에서는 HEVC 디블록킹 필터가 적용된 픽쳐를 추가 메모리에 복사하는 구현 방식과 HM-10.0 의 SAO 구현 방식 각각에 대해 데이터-레벨 병렬화를 적용하고 각각의 성능을 비교 분석하였다. 실험 결과, HEVC 디블록킹 필터가 적용된 픽쳐를 추가 메모리에 복사하는 구현 방식은 데이터-레벨 병렬화의 구현은 쉽지만, 디블록킹 필터링 된 픽쳐를 추가 메모리에 복사하는 부분 때문에 HM-10.0 기반의 병렬화보다 복호화 성능이 저하될 수 있음을 확인하였다. 이에 반해 CTU 의 행 단위로 병렬 수행될 영역을 분할하는 방식은 구현의 용이성과 병렬화 성능을 동시에 얻을 수 있음을 확인하였다.

• Journal of The Korean Astronomical Society
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• v.29 no.spc1
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• pp.251-252
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• 1996

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.46 no.6
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• pp.443-444
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• 2020

• Food Science and Preservation
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• v.9 no.1
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• pp.28-35
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• 2002

This study was conducted to evaluate the quality characteristics of different soy sauces. The soybean sauces brewed tty the A. oryzae koji(SAO), M. pilosus-1 koji(SMP) and the mixture of 50% M. pilosus-1 koji(SAM) during 90 days fermentation. Total nitrogen contents of the SAM, SAP and SMP were 13.6%, 1.15% and 1.22%, respectively. Content of amino type nitrogen in SAM was 0.78%, and the content was higher than those of SAO and SMP. Total free amino acid contents of SAO, SMP and SAM were 533.8, 732.4 and 807.3 mg/100 mL. The highest contents of free, amino acids were glutamic acid(65.20 mg/100 mL) in SAG, alanine(101.42 mg/100mL) in SMP, glutamic acid(130.52 mg/100 mL) in SAM. The highest activities of pretense and ${\beta}$-amylase showed in SAM, and the lowest activities of ${\alpha}$-amylase and glucoamylase were in SAO and SMP respectively. Hue angle values showed 56.3 in SAO, 29.0 in SMP and 32.2 in SAM. Monacolin K contents, as inhibitor of cholesterol bio-synthesis were 6.21 $\mu\textrm{g}$/mL for SMP and 3.10 $\mu\textrm{g}$/mL for SAM, and the inhibitory activities of SMP ane SAM aginst HMG-CoA reductase were 21.5 md 10.2%, respectively. Sensory scores for color, flavor, savory taste and overall taste of SAM was higher than those of SAO and SMP.

• Computers and Concrete
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• v.20 no.4
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• pp.483-490
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• 2017

This paper studies on the behavior of reinforced concrete (RC) pipes used in basic sanitation in the conduction of storm water and sanitary sewer. Pipes with 800 mm and 1200 mm in diameter were analyzed. The 800 mm pipes were built with simple reinforcement and the 1200 mm pipes with double reinforcement. For the two diameters of pipes the presence or absence of the pocket was evaluated, and the denomination of each one is spigot and pocket pipe (SPP) and ogee joint pipe (OJP), respectively. The 3D numerical models reproduce the three-edge-bearing test that provides information about the strength and stiffness of the reinforced concrete pipes. The validation of the computational models was carried out comparing the vertical and horizontal displacements on the springline and crown/invert and it was also evaluated the reinforcement strains and the crack pattern. As a main conclusion, the numerical models represented satisfactorily the behavior of the pipes and can be used in future studies in parametric analysis.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.2
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• pp.391-396
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• 2013

In this paper, for HEVC decoding, an SAO hardware design with less processing time and reduced area is proposed. The proposed SAO hardware architecture introduces the design processing $8{\times}8$ CU to reduce the hardware area and uses internal registers to support $64{\times}64$ CU processing. Instead of previous top-down block partitioning, it uses bottom-up block partitioning to minimize the amount of calculation and processing time. As a result of synthesizing the proposed architecture with TSMC $0.18{\mu}m$ library, the gate area is 30.7k and the maximum frequency is 250MHz. The proposed SAO hardware architecture can process the decode of a macroblock in 64 cycles.

• IEIE Transactions on Smart Processing and Computing
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• v.5 no.4
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• pp.243-249
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• 2016

This paper proposes a new watermarking algorithm to embed watermarks in thr process of sample adaptive offsets (SAO) for high efficiency video coding (HEVC) compressed videos. The proposed method embeds two-bit watermark into the SAO offsets for each coding tree unit (CTU). To minimize visual quality degradation caused by embedding watermark, watermark bits are embedded into SAO offset depending on the SAO types of block. Furthermore, the embedded watermark can be extracted by simply adding four offsets and checking their least significant bits (LSB) at the decoder side. The experimental results show that the proposed method achieves 0.3% BD-rate increase without much visual quality degradation. Two-bit watermark for each CTU is embedded for more bit watermarking. In addition, the proposed method requires negligible computational load for watermark insertion and extraction.

• Journal of Astronomy and Space Sciences
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• v.10 no.1
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• pp.36-43
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• 1993

We have made UBV light curves of a newly discovered eclipsing binary, SAO23229 at Sobaeksan Astronomy Observatory. We determined a minimum light time of HJD2448636.1170$pm$0.0005 that is 3 minimum later than predicted time, and found a peculiar light variation at phase 0.75 that may not be secondary eclipse. Orbital period of SAO23229 would be 4.2 days rather than 2.1 days. Our analysis of the light curves shows that SAO23229 has a detached configuration consisting of two almost identical F type main sequence stars.

• Transactions of Materials Processing
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• v.21 no.4
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• pp.246-251
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• 2012

The mechanism for mechano-luminescence(ML) in SAO phosphor was investigated quantitatively by measuring the emission intensity under three different tensile conditions. It was found that the ML of SAO was strongly dependent on the dynamic loading rate rather than by the applied load itself. The mechano-luminescent emission in SAO was evaluated based on the trap-releasing process. It was found that the shape of the ML curve in the transient regime obtained from the rate equation has good agreement with the experimental data.

• Imaging Science in Dentistry
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• v.51 no.3
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• pp.323-328
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• 2021

Tooth extraction after head and neck radiotherapy exposes patients to an increased risk for osteoradionecrosis of the jaw. This study reports the results of a radiographic analysis of bone neoformation after tooth extraction in a case series of patients who underwent radiation therapy. No patients developed osteoradionecrosis within a follow-up of 1 year. Complete mucosal repair was observed 30 days after surgery, while no sign of bone formation was observed 2 months after the dental extractions. Pixel intensity and fractal dimension image analyses only showed significant bone formation 12 months after the tooth extractions. These surgical procedures must follow a strict protocol that includes antibiotic prophylaxis and therapy and complete wound closure, since bone formation at the alveolar socket occurs at a slower pace in patients who have undergone head and neck radiotherapy.