• The Journal of the Korea institute of electronic communication sciences
• /
• v.10 no.9
• /
• pp.1019-1026
• /
• 2015

This paper studied the source coding rule of the characters to minimize the HDB-3 scrambling for UTF-8 code. An existing source coding rule of the characters to minimize the HDB-3 scrambling in the line coder is for the source codes which are directly entered into the line coder without any transformation. Therefore the existing source coding rule can't apply the UTF-8 code which is directly came into an input of line coder. The reason is that the scrambling code in the source codes are not same as UTF-8 codes. So, if they want to analysis the scrambling occurrence situation in UTF-8 codes and make an unscrambling UTF-8 code, they should make a UTF-8 code table for the source codes, find out the scrambling occurrence codes and then encode the unscrambling source code. The source coding rule for UTF-8 code showing this paper can omit such a complicated procedure to encode an unscrambling source code.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.8 no.7
• /
• pp.1017-1023
• /
• 2013

Datacommunications transmit the source codes that are coded in information devices, such as computer to the transmission line by means of the line coded signal. AMI method is applied to the line coding method to transmit the signal for long distance. The disadvantage of the AMI method is to loss the bit synchronization when consecutive binary bit '0' over 4ea is coming into line coder. The scrambling technique is used to overcome the problem. The HDB-3 scrambling method is used in Korea standard which standard in ITU-T. When the HDB-3 technology is used. the method should convert the consecutive bit '0' over 4ea to certain bits format. As a result, when there are many such kind of '0' bit stream in source codes, data transmission efficiency will be decreased to treat in line coder, etc. This paper is directed to study the Roman character code system in $KS{\times}1001$, Korea standard for information exchange code in datacommunication systems. Based on the study result, this paper proposed the maximum optimized Roman character code system. In the study, Character coding rule for $4{\times}4$bits and the statistical data for roman character using frequency were considered to simulate. The paper shows the result that when the proposed new roman character coding system is applied to use, the data transmission efficiency could be increased to about 134% compared to existing code system.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.8 no.2
• /
• pp.227-240
• /
• 2013

This paper studied how much influence UTF coded data is given to HDB-3 operation efficiency. This paper applied the Hangul Jamo and Compatability Hangul Jamo in Unicode to compare to its UTF-8 coded data. As a result of study, When Unicode is reformatted to UTF-8 code, the data code run counter to the source coding rule was very much increased.

• Journal of Advanced Navigation Technology
• /
• v.16 no.5
• /
• pp.831-838
• /
• 2012

In the transmission system, the transmission efficiency can be increased by applying the proper character coding method. This paper is to show the character coding rule in computer and information equipment etc to improve the transmission efficiency in datacommunications. The character coding rule showing in this paper was suggested by considering the two view points. First one is FLAG bits in HDLC and PPP protocol on datalink layer in OSI 7 layer. Second one is one of the scrambling method, HDB-3, on physical layer in OSI 7 layer. The former is to prevent the sequence of over 5bits of "1" in the character codes. The latter is to prevent the sequence of over 4bits of "0" in the character codes.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.10 no.7
• /
• pp.831-836
• /
• 2015

This paper studied scrambling occurrence in the line coder for UTF-8 hangul syllable code based on unicode. The paper suggested that scrambling is occurred when consecutive four "0" bit is entered into the line coder from the source codes. Currently, ITU-T is applying HDB-3 scrambling method in AMI line coder, According to the study result, scrambling is occurred about 39% in UTF-8 code on Unicoe Hangul syllable.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.10 no.1
• /
• pp.39-46
• /
• 2015

The paper studied possibility of improvement of efficient of data processing in the line coder when Hangul syllables in Unicode system is used for the source code. The scrambling in the line coder is to solve the problem happened due to the source code. The study is based on the HDB-3 scrambling method in ITU-T standards that is applied to AMI line coder. The referred data of Hangul syllables and its use frequency which are required to analysis was used the data extracted from the source data of the National Korean Language Institute. According to the analysis, the average 24% scrambling was generated in source code of Hangul syllables in Unicode system. When the referred Hangul syllables was applied to Unicode system, the average 27% scrambling was producted. Total 8,924ea Hangul syllables in 11,172ea Hangul syllables in Unicode system were not scrambled. Therefore the referred Hangul syllables 1,540ea were accepted in the unscrambled code areas. As a result, the existing Unicode Hangul syllable codes can't prevent the scrambling, but it is possible to completely remove the 27% scrambling with new source coding system. And then, it can be improved the data processing efficient upto minimum 27% in line coder by software in presentation layer instead of physical layer.

• Journal of Advanced Navigation Technology
• /
• v.16 no.6
• /
• pp.1044-1051
• /
• 2012

This paper proposed a new Hangul Jeongum Jamo coding system. To do it, the current Hangul Jeongum coding system was analyzed with the source coding rule of character. As a result of the study, the current Hangul Jeongum coding system should be changed because there are many violated codes in the coding system. When the proposed coding system for Hangul Jeongum coding system is applied, the datacommunication efficiency could be increased to 19.78%.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.8 no.7
• /
• pp.1011-1015
• /
• 2013

This paper analyses the violation rate of CJK joint Chines character Unicode to the source code rule. In the paper, Chinese character 150ea in Chinese Unicode which have relatively a higher frequency in use of a character was chosen to study. The frequency rate in use of the 150ea characters is about 50% of the total frequency rate of the Chinese characters. The study was applied the AMI/HDB-3 line coding/scrambling and HDLC protocol, According to the analyses, the number of violated characters were 77ea of 150 ea, frequency rate in use 29%. Therefore, when the violated 77ea characters are replaced to the matched character codes to the source coding rule, the processing rate of the line coder can be improved about 37%.

• Journal of Advanced Navigation Technology
• /
• v.15 no.5
• /
• pp.749-756
• /
• 2011

This paper propose the rule of coding for the characters and symbol, etc which are used in computer, information devices, etc. When they use the rule of coding, they may improve the efficiency of transmission in data communications by reducing the number of scrambling during the line coding in the coder in the transmitter. The paper considered the codes of two bytes(16 bits) of 4bits column ${\times}$ 4bits rows. In the paper, we applied the code system of Roman characters in KS X 1001.

• Korean Business Review
• /
• v.7
• /
• pp.145-164
• /
• 1994

본 연구는 조직의 작업정보환경이 개인의 피이드백 추구 행위에 어떤 영향을 주는가에 관한 탐색적인 연구이다. 피이드백 추구 행위를 '탐지'와 '문의'의 유형으로 나누되, 피이드백 원천에 따라 상사에 대한 문의, 상사에 대한 탐지, 동료에 대한 문의, 동료에 대한 탐지를 구분하였으며, 작업정보환경은 피이드백 원천(상사, 동료, 자기자신)으로부터의 피이드백을 피이드백 부호(긍정적 피이드백, 부정적 피이드백)에 따라 평가하였다. 연구의 방법은 군 헬리콥터 조정사 훈련생 187명을 대상으로 질문지 방법에 의하였다. 연구의 결과 첫째, '탐지'와 '문의'의 피이드백 추구행위는 정의 상관관계를 보임으로써 피이드백 추구전략으로서 두 행위 유형은 서로 대체관계에 있지 않으며, 특정 유형의 피이드백 추구행위가 오히려 다른 유형의 피이드백 추구행위에 대한 필요성을 높여주고 있는 것으로 나타났다. 즉, '탐지'를 통한 피이드백과 '문의'를 통한 피이드백은 적어도 질적으로 상이한 정보를 제공하여 주는 것으로 인식되고 있음을 알 수 있다. 둘째, 어떤 원천으로부터 제공되었거나 추구된 피이드백 정보는 다른 피이드백 원천으로의 추구행위와 정의 상관관계를 보임으로써, 여러 피이드백 원천들로부터 제공되는 피이드백 정보는 피이드백 수신자에게 서로 대체적인 역할을 하지 않으며, 특정 피이드백 원천으로부터의 피이드백은 피이드백 수신자로 하여금 질적으로 상이한 정보를 제공하여 주는 것으로 인식되는 상이한 원천으로부터의 피이드백을 추구하도록 한다는 것을 알 수 있다. 셋째, 작업정보환경에서 긍정적 피이드백이 주어지면 인상관리의 측면에서 적극적으로 피이드백을 추구하는 경향이 있었으며, 부정적 피이드백이 주어진 경우, 본 연구에서와 같이 성과가 매우 중요시 여겨지는 조직에서는 개인이 그 정보적 가치를 높게 평가하여 대체로 피이드백을 적극적으로 추구하는 경향이 있는 것으로 나타났다.