互動電視選單中文字體大小與種類適切性之研究

A Study of The Appropriate Font Size and Type of Chinese Characters of EPG/ESG

章元嶽

指導教授 ： 王希俊

國立臺灣師範大學/科技學院/圖文傳播學系/碩士(2011年)

摘要

為了解電視選單中文字體大小與種類的適切性，俾利開發互動電視服務使用者介面時有設計依據，本研究以字高與螢幕高度的比例範圍在2.5%~6.5%之間為字體大小分20個水準，並以黑體、楷體、明體、圓體四類，每類各有細、中、粗三種字體計12個水準為自變項。再依設定的自變數設計建置各種模擬電視選單，以實驗法測試受試者對模擬電視選單文字覺得清楚易讀的主觀感受與偏好。並比較在21”CRT電視機與42”LCD兩種大小不同螢幕類型時，以及採SD與HD兩種不同選單呈現時，分別對上述探討之各項主觀偏好有無差異。
　　在對電視選單字體大小清楚度的主觀感受方面，SD或HD選單對清楚度主觀感受的影響並無明顯差異，但螢幕大小則有顯著影響。當電視螢幕是21”時，受試者主觀上認為視角為25弧分或字螢高比為4.6%以上之大小是清楚的；視角為21弧分或字螢高比為3.8%以下之大小則不清楚。而當電視螢幕是42”時，受試者主觀地覺得視角為31弧分或字螢高比為4.2%以上之大小是清楚的；而視角為22弧分或字螢高比為2.9%以下之大小則不清楚。
　　在對電視選單字體大小喜好度方面，SD或HD選單對喜好度主觀感受的影響並無明顯差異，但螢幕大小則有顯著影響。當電視螢幕是21”時，受試者偏好視角為28弧分或字螢高比為5.0%以上之大小；而視角為23弧分或字螢高比為4.2%以下之大小，受試者較不喜愛。當電視螢幕是42”時，受試者主觀上喜好視角為32弧分或字螢高比為4.4%以上之字體大小；而視角為28弧分或字螢高比為3.8%以下之字體大小，則較不受受試者喜愛。
　　在對電視選單字體種類喜好度方面，無襯線且筆畫較為均勻一致之黑體與圓體較受喜好；筆畫粗細變化較大之楷體與明體則較不受喜好。而本研究所選取之範圍內，各種字體粗細的差異對喜好度的影響不顯著。受試者對字體種類之喜好或不喜好，並不因螢幕之大小尺寸而有顯著差異，亦不因選單係SD或HD之區別而有所差異。

關鍵字

電視選單 ； 字型 ； 網路電視 ； 互動電視 ； 字體 ； 使用者偏好

並列摘要

To understanding the appropriate font size and type of Chinese characters of EPG/ESG, as a basis for IPTV UI design, experiment approaches were taken in this research for surveying the users’ preference for font size and type of characters of EPG from users’ subjective point of view. A set of simulated EPG were deployed. 20 levels of independent variables of size from 2.5%~6.5% character/screen height ratio were given and the 12 levels of independent variables of type were Hei, Kai, Ming and Yuan with different weight, bold, middle and, light for each type. The differences of effects on users’ preference between different scree size, 21’ and 42”, and different resolution, SDTV and HDTV, were also compared.
　　For the effects of character sizes on users’ subjective feeling of legibility, there is no significant difference between SD and HD EPG. However screen size does. For 21” television, subjects felt legible when the visual angle of character was more than 25 minutes, or character/screen height ratio more than 4.6%. While less than 21 minutes or 3.8%, it did not. For 42” television, subjects felt legible when visual angle of character was more than 31 minutes, or character/screen height ratio more than 4.6%. Those less than 22 minutes or 2.9% were illegible.
　　For the effects of character sizes on users’ preference, there is no significant difference between SD and HD EPG. However screen size does. For 21” television, subjects preferred when visual angle of character was more than 28 minutes, or character/screen height ratio more than 5.0%. Those less than 23 minutes or 4.2% were unpleasing. For 42” television, subjects felt pleasing when visual angle of character was more than 32 minutes, or character/screen height ratio more than 4.4%. Subjects disliked those less than 28 minutes or 3.8%.
　　For the effects of character type on users’ preference, subjects preferred serifless Hei and Yuan type than Kai and Ming. There is no significant difference between SD and HD EPG, nor between different screen sizes.

並列關鍵字

EPG ； font ； IPTV ； MOD ； type ； user preference

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