전산개론-정보의 표현

수치와 문자의 표현
연산에 사용하지 않는 수와 문자는 약속된 코드인 아스키 코드나 유니코드를 사용하는 것을 강조

아스키코드
미국 표준에서 영문자를 위해 제정된 코드
3개의 존과 4개의 디지트로 127가지 서로 다른 문자로 표현
오늘날에는 1비트 추가(패리티비트) 8비트로 사용

유니코드
영어를 제외한 언어에 사용할 수 있는 확장된 16비트 새로운 코드
아스키 코드 포함
한글, 중국어, 일본어, 다양한 언어를 위해 코드 영역 지정
16비트 또는 32비트로도 확장
텍스트의 확장
한글 초성, 중성, 종성
2바이트로 표현
조합형 및 완성형 코드에서 글꼴이 예쁜 완성형 사용
완성형 코드: 한글로 만들 수 있는 모든 글을 만들어 놓고 쓴다
한글의 정보 표현 단위
자금, 모음 (한글의 알파벳)

2. 멀티미디어 정보의 표현
비트, 바이트, 워드
비트: 0과 1
바이트: 비트가 8개 모임 (한글은 2바이트)
워드:

킬로 바이트, 메가 바이트, 기가 바이트
1kb = 1024 바이트 (원고지 1장)
1mb = 책이 한권
1gb= 책이 천권

정보 단위와 수의 표현
수의 표현과 진법
2,8,10,16진법
사용하는 숫자의 갯수 , 밑 수
16진법(a와 f까지 빌려 쓴다. 10은 a, 11은 b)

수의 변화
십진수에서 다른 진수로 변환

수의 변환
다른진수에서 십진수로 변환
다항식으로 표현(포리노미알)

정수의 표현
부호-크기 방식
양수는 0, 음수는 1
양수 값 에 1을 더하면 음수가 된다.

2의 보수
현재 있는 수는 반전 시키고 1을 더하면 된다

정보 단위와 수의 표현
정수의 덧셈과 2의 보수 방식

실수의 표현
101.01

전산개론-정보의 표현” 에 대한 91개의 댓글

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