• 방송공학회논문지
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• 제20권1호
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• pp.68-81
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• 2015

최근 부품기술 및 미디어 처리기술의 발전과 함께 HDTV를 이을 UHDTV 서비스가 곧 도래할 것이라는 예상이 기정사실화되고 있다. 이에 따라 HDTV에서 5.1채널 서라운드 사운드를 제공했던 오디오 기술도 UHDTV 시대의 도래와 함께 어떠한 서비스를 제공하여야 할지 고민하여야 할 시점에 와 있다. 그러나 현실은 HDTV의 5.1채널 사운드 포맷조차도 가정에서의 설치 및 유지의 어려움으로 인해 시장에서의 고전을 면치 못하고 있다. 한편, 영화 사운드 시장에서는 오랫동안 사용되고 있던 5.1, 7.1 채널 사운드 포맷이 돌비 ATMOS, IOSONO, AURO3D 등 천정 사운드와 객체기반 오디오를 포함하는 하이브리드 오디오 기술이 잇달아 도입되면서 일대 격변기를 맞이하고 있다. 이러한 객체기반 오디오 기술은 홈씨어터 및 방송 오디오 시장에서도 도입이 확실시되고 있는 실정이며, 이러한 오디오 기술의 변화는 유연성이 결여된 채널기반 오디오의 기술 발전 및 시장 성장의 활로를 개척하는 호기가 될 것으로 전망된다. 따라서 본 논문에서는 UHDTV 방송에 적합한 실감 오디오 기술에 대한 고찰과 이와 관련된 하이브리드 오디오 기술의 콘텐츠 포맷 및 가정에서의 재현 방안에 대해서 기술하고 향후 전망을 고찰해 보고자 한다.

• 한국가정과교육학회지
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• 제9권1호
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• pp.1-17
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• 1997

This study was conducted to obtain basic materials to improve the teaching method of Home Economics by theoretically looking into the supplementary teaching materials or implements usable in teaching Costume History area. And based on these data, the types and the applications of the supplementary teaching materials or implements highschool owned were examined. The subjects of this study were 111 Home Economics and Housework curriculum highschool teachers who give a lecture in the country by using self-administered questionnaires. SAS program was used to calculate frequency, percentage, average, standard deviation, and $\chi$(sup)2-test analysis. The results of the study were as follows； 1. Most of the highschool teachers used the school expenses for experiments in preparing the supplementary teaching materials or implements. 2. Of the supplementary teaching materials and implements concerning Costume History, visual implements such as slides and pictures were the mostly owned. CD and audio implements as cassette-tapes were not used. 3. Most of the teachers recognized the importance of the audio-visual teaching materials and implements concerning Costume History. 4. Among the audio-visual materials and implements concerning Costume History by which can be made by school teachers of Home Economics and Housework curriculum, the mostly used one was ‘cutting pictorials from magazines and newspapers’, and the next were ‘orbital materials’, and ‘copy the pictorials’, and the least was ‘recording from the radio’. 5. Most of the annual expenses assigned to the department of Home Economics was used in cooking practice, and the least of the expenses was assigned in buying audio-visual teaching materials and implements. 6. Time assigned to the area of Home Economics was for the most part one or two hours per week, and among this, time assigned to the history of western costume and the history ok korean costume was for the most part five to eight hours. 7. The areas that the highschool teachers felt difficulties mostly during clothing and textiles curriculum were ‘textiles’and the next were ‘knitting’, ‘western costume history’, and ‘korean clothing construction’. 8. The difficulties the highschool teachers faced while teaching Costume History were mostly that ‘the pictorials in the text is not fully explainable’, the next were ‘most of the supplementary teaching materials or implements are not owned’, ‘have to explain very much in a short time’, and ‘the lectural explanation is insufficient’. 9. The solution for the difficulties that the highschool teachers faced while teaching Costume History was mostly ‘the information, on which audio-visual materials and implements are distributed in the market, should be easy to obtain’, the next opinions were ‘the school should provide enough experiment and practice expenses to buy audio-visual materials and implements’, and ‘education facilities of the Home Economics Department should be the main aspects in improving the teaching methods and should give special lectures about it’.

• 방송공학회논문지
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• 제12권3호
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• pp.222-229
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• 2007

멀티미디어 부호화 기술의 발전에 따라 HDTV, DVD 등 고품질 멀티미디어 서비스가 가능하여 졌으며, 오디오의 경우 5.1채널 오디오의 사용범위가 점점 확대되어, 가정용 극장 시스템(Home Theater), 자동차용 극장 시스템(Car Theater)에 의해 일반 소비자들도 쉽게 접할 수 있는 서비스가 되었다. 지상파 DMB는 휴대용 방송 서비스로서 2005년 12월부터 본격적으로 서비스되고 있으나, 그 대역폭이 충분하지 않고 휴대용이라는 특성에 의해 멀티채널 오디오에 대한 고려를 하지 않고 있다. 최근 휴대용 방송 서비스를 위한 고효율 멀티채널 오디오 부호화 기술 표준화가 MPEG에서 추진되고 있음에 따라 DMB에서도 멀티채널 오디오 서비스에 대한 가능성이 열렸으며, 유럽에서는 이를 이용한 다양한 서비스를 시도하려고 계획하고 있다. 본 논문에서는 한국에서 서비스되고 있는 지상파 DMB를 통한 멀티채널 오디오 서비스의 가능성을 검증하기 위해 멀티채널 오디오 부호화 기술 및 검증 시스템의 구현에 대하여 기술하며, 향후 서비스 실현을 위한 가능성을 고찰하고자 한다.

• 한국정보통신학회논문지
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• 제12권12호
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• pp.2165-2170
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• 2008

본 논문에서는 인터넷 기반 전송기술인 TCP/IP 네트워크의 한 분야인 AoIP(Audio over Internet Protocol)를 기반으로 한 지역분산형 오디오시스템을 구현하였다. 이 시스템은 SNMP 프로토콜을 기반으로 제어하며 입력된 아날로그 음원을 디지털로 변환하여 패킷으로 만들어 UDP로 전송하게 된다. 구현된 지역분산형 오디오 시스템은 최근 들어 각광받고 있는 홈시어터 시스템과 같이 다중 채널의 음향을 이용하는 경우와 다양한 음원 소스를 여러 지역에 분산하여 전송하는 PA(Public Address)시스템 등의 실용 가능성을 제시하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
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• pp.605-607
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• 2004

A class D digital audio amplifier with small size, low cost, and high quality is positively necessary in the multimedia era made of home theater system and the digital audio broadcasting (DAB). It is impossible to analyze the stability of the digital audio amplifier, which is based on the PWM signal processing. To solve this problem, the digital audio amplifier is analyzed using variable structure control theory which is one of nonlinear system theories. Moreover, the magnitude and the frequency of ripple signal, which generated by hysteresis in the comparator, is obtained using describing function which is useful to represent the input-output relation of nonlinear system.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(1)
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• pp.101-104
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• 2002

In this parer, a novel architecture for Home gateway is Proposed. In home network system, there exist many different kinds of data types, like audio, video, and control information. And the communication is over multiple networks, like bluetooth, wireless LAN, USB, IEEE1394, and Power Line Communication (PLC). The hardware architecture of the Home gateway presented in this paper is based on ISO/1EC JTC 1/sc 2S/WG 1(1,2). The architecture proposed in this paper takes into account the characteristics of home network environment, so the Packets in the home network system can be processed very efficiently.

• 대한임베디드공학회논문지
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• 제6권3호
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• pp.174-182
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• 2011

Conventional home audio system (e.g. AV Receiver, CD Player etc) has a various functionality of audio play, channel mixing, but the remote controller of these audio players is too complex, difficult for user to manage them effectively. Users want to use these functionalities with more easy, comprehensible way. In this study, "intelligent real-sound presentation technology" that support high quality, realistic audio and the "design of complex information and controller of real sound using intelligent real sound play and control interface" will be introduced. So user can actively, realistically enjoy and play real sound based on user's preference, emotion and circumstance, instead of user's passive service.

• 한국컴퓨터정보학회논문지
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• 제24권5호
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• pp.59-66
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• 2019

According to the KT telecommunication statistics, people stayed inside their houses on an average of 11.9 hours a day. As well as, according to NSC statistics in the united states, people regardless of age are injured for a variety of reasons in their houses. For purposes of this research, we have investigated an abnormal event detection algorithm to classify infrequently occurring behaviors as accidents, health emergencies, etc. in their daily lives. We propose a fusion method that combines three classification algorithms with vision pattern, audio pattern, and activity pattern to detect unusual user events. The vision pattern algorithm identifies people and objects based on video data collected through home CCTV. The audio and activity pattern algorithms classify user audio and activity behaviors using the data collected from built-in sensors on their smartphones in their houses. We evaluated the proposed individual pattern algorithm and fusion method based on multiple scenarios.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(1)
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• pp.133-136
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• 2002

VoiceXML is designed for creating audio dialogs that feature synthesized speech, degitized audio, recognition of spoken and DTMF key input, recording of spoken input, telephony, and mixed-initiative conversations. Uses the VoiceXML and there is a Place objective which does information home appliance machinery and tools control. When it uses tile VoiceXML, il will be able to provide a bias characteristic to the user The XML base the gearing with different civil official system is possible. With studying YoiceXML and OSGi, this paper has designed and implemented the control architecture of Information home appliances.

• Transactions on Electrical and Electronic Materials
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• 제9권3호
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• pp.123-127
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• 2008

The paper is to solve the problem of existing audio signal transfer system which has a difficulties of system organization and the increase of additional install cost and unfriendly interior. To solve the existing system, we drew the new audio signal transfer system based on PLC and evaluated it. A transmitter and a receiver were designed using the PLC chip INT5500CS. An audio signal transfer system was configured with a CD player to which audio signals are sent from the transmitter and a speaker connected to the receiver. For performance evaluation of this system, a USBPre external sound card and Smaart Live 5 which is a PC-based sound measuring program were added. As a result of our experiment, the measured signal level is $2{\sim}3$ dB lower than reference signal, latency is 16.69 ms, and the specific character of coherency is bad in high frequency band. Otherwise, this system transmits and receives signals over 90 % in good condition as a result of measuring pink noise, frequency (1 kHz), and phase, magnitude. In view of the result so far achieved, the system designed this study has excellent performance, it resolves defect of existing audio signal transfer system.