出版社：The Institute of Image Information and Television Engineers
摘要：Many TV programs broadcast captions for hearing-impaired people. Digital terrestrial television started in December 2003, so more Hi-Vision programs will be broadcast. Recently, since captions for Hi-Vision programs are produced using those for NTSC programs, the captions for Hi-Vision programs have been displayed in the same way as those of NTSC programs without modification. However, there are some differences between the viewing conditions for Hi-Vision and NTSC programs such as the screen aspect ratio and the preferable viewing distance. The presentation method of captions suitable for Hi-Vision needs to be investigated. We researched the letter size of captions and number of letters per line using a subjective evaluation test.
