미디어 기술의 대표로 간주되는 MPEG은 MPEG-1부터 MPEG-2, MPEG-4, MPEG-7, 그리고 MPEG-21까지 진행되면서 미디어 개념의 발전과 멀티미디어 처리 기술의 발전을 보여주고 있다. MPEG-1에서는 오디오와 비디오를 저장하기 위한 포맷을 정의하고 있으며, MPEG-2에서는 미디어 전송에 초점을 맞추고 있으며, MPEG-4는 객체기반 미디어 구조를 정의하고 있으며, MPEG-7은 미디어에 관한 메타데이터를 다루고 있으며, 마지막으로 MPEG-21은 미디어의 유통 프레임워크 기술을 다루고 있다. 일반적으로 미디어라함은 오디오(음성, 음향 포함) 및 비디오(이미지 포함) 신호를 지칭하며, 여기에 메타데이터를 포함할 때 컨텐츠라는 용어를 사용한다. 현재의 미디어 기술은 실감형 미디어로 발전되고 있으며, 단순히 보는 것과 듣는 것에 대한 실감뿐만 아니라 사람의 오감을 만족시키는 오감형 미디어로 진화하고 있다.
KSP Keywords
MPEG-2, MPEG-7, Mpeg-4
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