초고해상도 플렌옵틱 동영상 전송시스템에 관한 연구

김순철(Soon-Choul Kim),이제원(Jae-Won Lee),정준영(Joon-Young Chung) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.11

플렌옵틱 영상(Plenoptic video)은 복수의 소스 영상들의 조합에 의해 구성되므로 획득된 영상 크기는 대용량의 저장 장치와 관리 구조를 필요로 한다. 그리고, 사용자 요구 시점에 상응하는 영상 스트리밍이 원격의 단말에게 도달되는 지연시간을 최소화하여 제공될 필요가 있다. 본 논문에서는 25개 다중 뷰(RGB + Depth)를 갖는 초고화질 플렌옵틱 동영상을 원격의 단말에게 효과적으로 전송하기 위한 관련 스트리밍 기술 연구와 제안된 시스템 구조를 기술한다.

IP Multimedia Subsystem 환경에서 멀티미디어 호 제어를 위한 서비스 브로커 기능 개발

김순철(Soon-Choul Kim),이훈기(Hoon-Ki Lee),류원(Won Ryu) 대한전자공학회 2004 대한전자공학회 학술대회 Vol.2004 No.12

초고해상도 플렌옵틱 동영상의 저지연 뷰 이동을 위한 적응적 전송시스템 구현

김순철(Soon-Choul Kim),이제원(Jae Won Lee),정준영(Joon Young Chung) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.11

TPEG 기반의 신규 응용서비스를 위한 News-TPEG 프로토콜 설계 및 구현

김순철(Soon-Choul Kim),정영호(Young-Ho Jeong),조삼모(Sam-mo Cho),김건(Geon Kim),안충현(Chung-Hyun Ahn) 한국통신학회 2005 한국통신학회 학술대회 및 강연회 Vol.2005 No.12

방송 가상화 시스템 연구 개발 동향 및 발전 전망

김순철 ( Kim Soon Choul ),이우철 ( Lee Woo Chul ) 텔코경영연구원 2021 텔코 저널 Vol.9 No.-

방송은 IP 중심의 초고속 인터넷 발달에 힘입어 다양한 융합형 방송서비스들로 진화되고 있다. 이제 방송서비스는 언제, 어디서나 모두에게 최적의 방식으로 제공받을 수 있게 되었다. 앞으로의 방통융합 서비스를 향한 경쟁력 강화 방안은 원활한 양질의 콘텐츠 생산과 유통, 전송서비스 품질의 지속적인 향상이라는 방향으로 나아가게 되었다. 현재 방송 전송 장비는 하드웨어 중심 혹은 단일 구성 동작 위주로 방송사에 구축되고 있으며, 방송프로그램 채널의 동적 운영이나 넓은 지역에 분포된 장비를 중앙집중 방식으로 더 유연하게 관리해야 하는 장비 사용자 요구에는 충분히 대처하기가 어렵다. 이를 극복하기 위해 소프트웨어 기반의 방송 인프라 가상화 도입의 필요성이 제기되고 있으며, 방송 인프라구조의 네트워크 가상화를 통해 다양한 차세대 통신망(5G/IoT)과의 융합을 추진하는데 있어서 충분히 대비할 수 있을 것이다. Broadcasting is evolving into various converged application services thanks to the development of high-speed Internet of IP. Additionally, broadcasting services can be delivered to viewers, anytime, and anywhere by the optimal delivery mechanism. Because the current broadcasting equipment in broadcasters is mainly operated in a way of hardware-centric devices or single operating system, that is not sufficient to cope with requirements such as dynamic program operation and management centralized for distributed devices over a wide area. To overcome this, software-based broadcasting infrastructure virtualization is necessarily being required, which will be completely helped for convergence with various next-generation communication networks (5G/IoT).

여유자원이 혁신형기업 재무성과에 미치는 영향: ICT 제조업을 중심으로

김영태 ( Young-tae Kim ),김순철 ( Soon-choul Kim ),김문겸 ( Moon-kyum Kim ) 한국중소기업학회 2018 기업가정신과 벤처연구 Vol.21 No.3

본 연구는 여유자원이론을 바탕으로 ICT 제조업 분야의 혁신형기업을 벤처 투자기업과 비투자기업, 그리고 여유자원의 보유수준이 높은 기업과 낮은 기업을 구분하여 재무 및 인적 여유자원이 재무성과에 미치는 영향을 실증분석을 하였다. 실증분석을 위해 한국 ICT 산업 내 451개 혁신형 기업에 대해 2014년부터 2017년까지 4개년간의 pooling data를 사용하여 OLS 회귀분석을 진행하였다. 분석 결과 벤처 투자기업과 비투자기업의 경우에는 벤처 투자기업이 대리인이론 관점에서, 비투자기업은 기업행태이론 관점에서 여유자원의 영향을 찾을 수 있었다. 그리고 여유자원의 보유수준이 높은 투자기업에서 여유자원을 충분히 활용해 재무성과를 높이는 것으로 나타났다. In this study, we examined the effects of organizational slack resources on financial performance of Korean ICT manufacturing companies based on slack resource theory. Specifically, we classified slack resources into financial slack and human slack and innovative ICT manufacturing companies into venture capital-backed or non venture capital-backed, high-leveled or low-leveled slack companies. For the empirical analysis, we used the four-year pooling panel data of 451 innovative ICT manufacturing companies in Korea from 2014 to 2017 and used the ordinary least squares regression model considering the issues of heteroscedasticity and autocorrelation in the panel data. The results indicate that slack resources differently impact the performance of innovative ICT manufacturing firm according to whether the companies were venture capital-backed or not. Venture capital-backed companies have a positive effect from financial slack but a negative effect from human slack. However, non venture capital-backed companies have positive effects form both slack resources. Venture capital-backed companies seem to make more financial profit through managing human resource more efficiently due to the existence of Venture capitalist based on the agency theory. Venture capital- backed ICT companies holding higher-leveled slack resource showed higher financial performance than companies holding lower-leveled slack resources.

일반 논문 : 관계금융이 중소기업 대출구조와 경영성과에 미치는 영향에 관한 연구

김문겸 ( Moon Kyum Kim ),이규옥 ( Kyoo Ok Lee ),김순철 ( Soon Choul Kim ) 한국중소기업학회 2011 中小企業硏究 Vol.33 No.2

본 연구는 중소기업에 있어서 관계금융의 효과가 대출구조와 경영성과에 어떠한 영향을 미치는지에 대해 기업의 규모와 업력으로 구분하여 살펴보았다. 본 연구는 관계금융의 편익과 비용 측면에서 벗어나 중소기업의 금융에서 중요한 역할을 하는 규모와 업력에 따라 관계금융이 금리수준과 금융비용에 미치는 영향에 있어 유의미한 차이가 있는지와 관계금융이 중소기업의 규모와 업력에 따라 수익성과 성장성에 차별적인 영향이 있는지를 분석하였다. 연구결과를 요약하면 다음과 같다. 첫째, 관계금융은 중소기업 창업 초기에 자금의 가용성 확보를 위한 유인으로 작용하게 된다. 둘째, 중소기업은 관계금융 형성 시 은행의 우월적 지위를 수용하게 된다는 것이다. 이는 창업 초기의 중소기업이 다양한 방법으로 자금을 조달할 수 없기 때문에 이를 극복하기 위해서는 금융기관과의 유대가 절대적으로 필요하기 때문인 것으로 판단된다. 셋째, 중소기업은 규모가 커지고 성장함에 따라 관계금융의 효익이 낮아진다는 것이다. The fact asymmetric information problems are apt to be much more serious in SMEs than in large companies makes the ways in which they raise debt capital differ significantly. In other words, SME financing through commercial banks often involves a long-term relationship that may mitigate these information problems. As Berger and Udell (2002) mentioned, one of the features of small and medium enterprise (SME) financing is that personal experience and subjective judgment of loan officer in financial intermediaries, particularly commercial banks, can affect decisions and terms of loan for SMEs while large companies typically obtain credit in the public debt markets. This close relationship between banks and companies in financing is called ``relationship banking`` and Boot (2000) mentioned that the relationship banking is established when banks make investments to get clients` information exclusively and provide various financial services through consistent and a wide range of interactions. The relationship banking in Korea has evolved from the one which resembles the ``main-bank system`` in Japan. Korea had adopted the main-bank system to control credit for large business conglomerates in 1982. Those main-banks played roles of controlling client companies financing plans and investments, performing financial analyses, and even promoting the improvements of capital structures. This study tried to investigate how the relationship banking affects financing costs of SMEs and SME performance from perspectives of traditional corporate finance and SME theories. Most existing researches have tried to figure out which party in the relationship banking, between companies and banks, has a superior position in terms of marginal profits and costs. They used the data of public companies, which usually are not SMEs, to analyze the relationship banking. We, however, believe that there must be a different shape of the relationship banking for SMEs and try to find impacts on the level of interest rates charged by banks, the size of interest payments by SMEs, and the managerial performance of SMEs from the perspective of the relationship banking. This study has several features differentiating it from other researches. First, this study has used only non-public SMEs in analysis, which expands our understanding of the relationship banking into the area of non-listed SMEs. Second, we tested if there exists any difference in effects of the relationship banking according to the capitalization size and ages of SMEs. Lastly, this study tried to see not only how the relationship banking affects the level of financial cost, but also the performance of SMEs, which would be the first attempt to relate relationship banking to company performance like profitability and growth. The data used in this study were obtained from the Industrial Bank of Korea data base. The Industrial Bank of Korea is a commercial bank with a focus on SME financing, so it maintains a consistent and complete database for SMEs. The data analyzed in this study was three year panel from 2006 through 2008 which encompasses a total of 7,618 SMEs with more than debt of about 0.9 million US dollars (1 billion Korean won). Classification of firms is made by capitalization size of 6.5 million US dollars (7 billion Korean won), which requires external auditing. If the size of capitalization is greater than 6.5 million US dollars, firms are categorized as a medium firm and a small firm with less capitalization. Also each category is divided into two subsequent categories, so that a total of four categories are involved in the analyses. Also, another classification was introduced in terms of age: one to five years, six to ten years, eleven to twenty years and more than twenty years. Spread between interest rate charged to SMEs and three month-KORIBOR (CDS) and ratio of interest payment and total borrowing (RAB) are employed as dependent variables to figure out how relationship banking affects interest payments of SMEs. Two other dependent variables, ratio of operating income to total assets (INR) and growth rate of assets (GRO), are adopted to investigate a relationship between SMEs` performance and relationship banking. A dummy variable of DBANK as an independent variable is included specifically to see if one main-bank relation has any peculiar impact on the level of interest and company performance. Proxies for relationship banking are borrowing period (LLT), degree of client contribution to bank (CGI), portion of loans without collaterals (NLL), and number of client`s accounts (CRS). It is found that as Pertersen and Rajan (1994), Berger and Udell (1995), and D`Auria et al. (1999) reported, an effect of lowering interest rate through one bank relationship is significant for SMEs with more than 7 billion KRW capitalization, which is required to be externally audited. But, in the group of less than 2 billion KRW, a positive relationship between a one bank-relationship and the level of interest payment is evident. This complies with the arguments of Sharpe (1990) and Rajan (1992) which reported a one bank relationship raised interest rates charged to small firms because banks monopolized information. Banks may require a risk premium based upon their monopolized information when they make loans to SMEs which do not have credit records or collateral, but SMEs can expand their availability of funds through a one bank relationship. Thus, these contradicting results from those previous researches indicate that the effects of relationship banking on the level of interest rates are different depending upon the size of firms. Also, other proxy variable such as CGI (client contribution) reassures that benefits of relationship banking exists for SMEs over a certain size while small firms can not enjoy the benefits of relationship banking in terms of the level of interest rates. Relationship banking, however, increases the availability of funds, especially for smaller firms. Also, as previous studies show, TAR (ratio of tangible assets to total assets) has a meaningful negative relationship with the level of interest rates and the size of interest payments, and OCF (ratio of operating cash flow to total assets) has a meaningful negative relationship with the level of interest rates, which implies that SMEs with larger fixed assets and operating cash flow have more debt capacities. The one bank relationship does not have a clear impact on the actual size of the interest payment. But, other proxies of LLT and NLL indicate the benefits of relationship banking exist in expanding availability of funds, especially for smaller firms. There are not many differential effects of relationship banking on the level of interest rates and the size of interest payments according to the different ages of SMEs. The results of analysis investigating effects of relationship banking on SME performance indicates that there exists differential effects of relationship banking according to the different sizes of SMEs. The one-bank relationship has a generally negative effect on profitability while any significant effect is not found in the largest group with more than 20 billion KRW capitalization. When this is combined with the relationship between proxies of relationship banking (LLT and CGI) and company growth, we can derive another implication that banks tend to maintain long time relationships with clients which are rather stable in their performance. Banks prefer stability of SMEs to growth. Also, the positive coefficient of NLL with company growth indicates that SMEs utilize augmented fund availability through relationship banking to raise their profitability in all groups. It is found that while CDS (level of interest rates) has a negative effect on profitability in the group of greater than 7 billion KRW, RAB (size of interest payment) contributes to increasing profitability in the group of less than 7 billion KRW. This implies that smaller SMEs raise profitability by taking advantage of financial leverage obtained through relationship banking. Meanwhile, it fails to find any meaningful relationship between the number of banks and growth, so that the one-bank relationship does not affect the growth of SMEs, which is contrary to Houston and James (1996).

중소기업 현금보유수준이 투자에 미치는 영향에 관한 연구

유지영(Ji-Yong Ryu),김순철(Soon-Choul Kim),김문겸(Mon-Kyum Kim) 한국창업학회 2017 한국창업학회지 Vol.12 No.3

본 연구는 중소기업의 현금보유수준이 기업투자에 영향을 미치는지에 대한 실증분 석을 하였다. 이를 위해 중소기업의 KOSDAQ 상장 및 비상장기업을 중심으로 국제 금융위기 전후 그리고 벤처ㆍ비벤처기업 간의 차이를 고려하여 분석하였다. 분석 결과, Keynes 예비적 동기에 의해 형성된 현금보유가 기업투자에 긍정적인 영향을 미치는 것으로 나타났다. 이와 같은 긍정적 영향은 벤처기업의 경우, 그리고 국제금융위기 이후에서 더 두드러진 것으로 분석되었다. 또한, 벤처기업 지정을 통한 투자와 수익의 선순환 고리가 있었고, KOSDAQ 상장 중소기업이 비상장기업에 비해 차별적인 영향이 나타나고 있음을 찾을 수 있었다. This study aims to conduct an empirical analysis of the impact of the cash holdings level of SMEs on business investment. For the purpose, this study conducted an analysis, considering the time around the international financial crisis and the differences between venture companies and non-venture companies, focusing on SMEs listed and unlisted on KOSDAQ. As a result of the analysis, it turned out that the cash retention formed by Keynesian precautionary motive has a positive impact on business investment. In the analysis, this positive impact was more noticeable in venture companies and after the time of the international financial crisis. In addition, it was found that there was a virtuous circle between investment and revenue through the designation of venture companies, and that there was an impact on the SMEs listed on the KOSDAQ differentiated from that on the unlisted companies.

학술연구 : 부채 만기구조가 투자에 미치는 영향: 대기업과 중소기업의 비교연구

김문겸 ( Moon Kyum Kim ),김순철 ( Soon Choul Kim ),조성권 ( Seong Kwon Cho ) 한국중소기업학회 2011 기업가정신과 벤처연구 Vol.14 No.1

본 연구는 중소기업과 대기업에 있어서 부채의 만기구조가 투자에 어떠한 영향을 미치는지에 대해 성장기회와 기업규모 수준을 구분하여 살펴보았다. 연구 결과는 첫째, 성장기회가 높은 수준과 낮은 수준별로 중소기업 및 대기업을 구분하여 부채 만기가 투자에 미치는 영향을 회귀 분석한 결과, 성장기회가 높은 기업에서 부채 만기가 투자에 부(-)의 영향을 미치는 것으로 나타났다. 또한 성장기회가 낮은 경우 부채의 만기가 투자에 별다른 영향을 미치지 않는다는 사실도 확인되었는데, 이러한 결과는 중소기업에서 보다 뚜렷하게 관찰되었다. 둘째, 중소기업 및 대기업을 다시 규모별로 세분하여 살펴본 결과 중소기업 집단에서 규모가 작을수록 부채 만기가 투자에 보다 큰 부(-)의 영향을 미치고 있음이 관찰 되어 규모가 작은 중소기업이 보다 많은 성장기회를 가지며 따라서 부채 만기가 투자에 부(-)의 영향을 받고 있음을 확인하였다. 셋째, 부채수준이 투자에 미치는 영향을 분석한 결과를 보면 전체적으로 부채가 보다 많은 투자를 유인한다는 사실이 확인되어 우리나라의 기업은 투자의 상당부분을 부채로 조달하고 있음이 확인되었다. 그리고 부채의 사용을 유인하는 요인에 대한 추가적인 회귀분석에서 신용위험이 낮고 현금흐름이 좋고 성장기회가 높은 기업이 장기 부채를 선호하는 것으로 나타났다. 그장 상황과 국내 금융시장 상황이 다르기 때문러나 이는 대리인비용가설과 신호표시가설에 기초한 Lang, Ofek and Stulz(1996)와 Aivazian, Ge and Qiu (2005a) 등의 연구에서 부채 수준이 기업 투자에 부(-)의 영향을 미친다고 한 주장과 다른 결과이다. 이러한 결과의 도출은 국내의 선행 연구와 본 연구의 추가적인 레버리지 분석에서도 제시되었듯이 외국의 금융시에 나타난 결과라고 해석된다. Based on the previous studies, this article classifies debt maturity structure of small/medium enterprises and large corporations and examines its effect on the investment according to the chance for growth and the size of enterprises. The results of the study are as follows: First, according to the result of regression analysis, it was found that debt maturity structure negatively(-) influenced on investment to companies with higher chance for growth. Also, it was confirmed that if chance for growth is low, debt maturity rarely influenced on investment. These results were shown more often in case of small/medium enterprises. Second, after comparing small/medium enterprises with the large corporations by size, it was found that debt maturity greatly influenced negatively on investment in smaller companies. The smaller the company, the more chance for growth it gets, proving that debt maturity influences negatively(-) on investment. Third, according to the analysis on how debt level affects on investment, this study confirmed that debt caused more investment and Korean companies prepared investment money mostly with debt. Through additional regression analysis on the cause of debt, it was shown that a company with higher chance for growth/ low credit risk/ good cash flow prefer long-term debt. The previous studies done overseas, Lang, Ofek and Stulz(1996), Aivazian, Ge and Qiu(2005a) based on the Agency cost Hypothesis and Signaling Hypothesis points out that debt level negatively(-) affects on investment to companies. But the research showed different results based on the difference between the foreign financial market condition and Korean financial market condition.

학술연구 : 미용재료산업 유통구조의 현황과 특징에 관한 탐색적 연구

김종근 ( Chong Guen Kim ),김순철 ( Soon Choul Kim ),정대용 ( Dae Yong Chung ) 한국중소기업학회 2005 기업가정신과 벤처연구 Vol.8 No.2