## 1 Introduction  
TV broadcasting, which is typically accessible to everyone, is an important medium for delivering crucial information, such as important news and government policy announcements, to the public. During the ongoing battle against COVID-19, we have often needed to listen to government briefings about the virus. When delivering such important information, a sign language interpreter is present next to the speaker so that DHH people can also understand the information. In 2020, the U.S. government was sued by the DHH association for not providing sign language interpreters during a COVID-19 briefing in the U.S. [1]. It is recognized that sign language should be provided as a basic service when delivering socially and politically important information. As shown in Figure 1, Korean sign language services are currently provided during the government's COVID-19 briefings or major news sessions by major broadcasters in Korea. Although Korean sign language interpreters appear along with the speaker in the government's COVID-19 briefings [2], they are usually placed in a circle or square in the lower right corner of the screen with the size of about a quarter of the vertical length of the screen in usual TV news programs [3]. These screens are viewed by both people with normal hearing and those who are DHH together. As shown in Figure 1b, a Korean sign language interpreter is usually presented in the lower right corner in a very small size, which leads to a question of whether their hands, a crucial means of communication in sign language, are sufficiently recognizable to DHH people. In situations where sign language services are becoming the norm, the research team of this study attempted to identify and solve the potential problems lying in the current sign language services from the perspective of DHH people. DHH individuals do not have a visibly distinguishable disability compared to others; what they suffer is problems due to their difficulties in hearing. The cognitive ability of DHH people is not different from that of non-disabled people [4; 5]. However, [PERSON] et al. stated through several research examples [6; 7; 8], \"In most deaf people, reading and writing skills fail to achieve levels appropriate to the age and intelligence of the student, typically lagging their peers by several years in the final years of obligatory schooling\". In addition, he mentioned that the reason for their low functional literacy was because most DHH people have restricted access to spoken language forms [9]. This is because there is a big difference between acquiring a language through hearing and acquiring a language through sight. Because of the loss of hearing, it is difficult for DHH people to learn language in a similar way to non-disabled people [10]. [PERSON] and [PERSON] suggested through experiments that \"the acquisition of a speech vocabulary available by eye alone not only is smaller but also shows different distributional characteristics than that for heard speech\" [11]. Thus, because DHH people rely on sight to acquire information, their literacy ability is significantly lower than non-disabled people [9; 12]. Figure 1: Samples of sign language services in TV broadcasting in Korea. Translation of subtitle–Left: “Please refrain from simple inspections due to limited inspection volume and inspection capabilities”. With regards to the language and information acquisition of DHH people, Korean Sign Language [13], a study on information accessibility of the disabled [14; 15; 16], a study on subtitles and visualization for DHH people [17; 18; 19; 20; 21], etc., and research on sign language interpretation screens using eye trackers have also been conducted [22; 23]. These studies have suggested diverse aspects related to the language and information acquisition of DHH people. First, the language used by non-disabled people is different from sign language in terms of grammar and word order.