Journal of KIISE:Software and Applications (한국정보과학회논문지:소프트웨어및응용)

Korean Institute of Information Scientists and Engineers (한국정보과학회)
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A Test Stream Generating Method for the Digital TV Software

디지털 TV 소프트웨어를 위한 테스트 스트림 자동 생성 방법

  • 곽태희 (삼성전자 CTO전략실 소프트웨어센터) ;
  • 최병주 (이화여자대학교 컴퓨터학과)
  • Published : 2003.10.01
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Abstract

The input of digital TV software is the Transport Stream, which utilizes the moving picture compression technique, MPEC-2 (Moving Picture Experts Groups-2). MPEG-2 TS consists of the complicated table hierarchy and internal relationships, as well as the various restrictions with regards to system standard of digital TV software in determining the field values of transport stream. However, the general MPEG-2 TS generation tool produces transport streams solely based on the MPEG-2 TS specification itself, and does not consider the interaction between modulo features or modules themselves, which construct digital TV software. In this paper, we propose a method to systematically generate MPEG-2 TS test data, namely‘Test Stream’, for digital TV software. We present the experiment result where the test stream derived from our developed tool according to the proposed method was applied to the actual digital TV software settop-box, and then analyze the result. Apart from other existing MPEG-2 TS generation tools, the advantage of our method is that not only is it capable of generating various levels of test streams including digital TV software module, integration, and system testing, but also detecting errors and analyzing their causes.

디지털 TV 소프트웨어의 입력은 MPEG-2(Moving Picture Experts Groups-2) 동영상 압축 기술을 이용한 전송 스트림(Transport Stream)이다. MPEG-2 TS는 복잡한 계층 구조와 내부 연관관계를 가지고 있으며, 스트림의 필드 값 결정 시 디지털 TV 소프트웨어의 시스템 규격과 관련된 다양한 제약 사항이 존재한다. 그러나, 일반적인 MPEG-2 스트림 생성 도구들은 MPEG-2 TS 자체의 명세만을 가지고 스트림을 생성하므로 디지털 TV 소프트웨어를 구성하는 모듈의 기능이나 모듈 사이의 상호 작용은 고려하지 않는다. 본 논문에서는 디지털 TV 소프트웨어의 테스트를 위해 체계적으로 테스트 스트림을 생성하는 방법을 제안한다. 또한 제안한 방법을 적용하여 생성한 테스트 스트림을 실제 디지틸 TV 수신기 시스템에 적용한 실험 결과를 제시한다 본 방법을 이용하면 기존의 스트림 생성기와 달리 디지털 TV 소프트웨어의 시스템 테스팅 뿐 아니라, 모듈 및 통합 테스팅을 위한 테스트 스트림의 생성이 가능하며 발견된 오류의 원인 분석이 가능하다.

Keywords

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