早期電視撥映完畢出現有時刻表的彩色圓球叫什麼? - 社會議題
By Callum
at 2009-02-22T00:00
at 2009-02-22T00:00
Table of Contents
早期電視撥映完畢出現有時刻表的彩色圓球叫什麼?
最好有中英文,還有圖片!
最好有中英文,還有圖片!
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社會議題
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By Barb Cronin
at 2009-02-22T22:06
at 2009-02-22T22:06
圖片參考:http://tw.yimg.com/i/tw/ugc/rte/smiley_1.gif
那個有時刻表的彩色圓球叫「檢驗圖」,在早期電視開播或收播時會出現,看看是不是這張圖?
圖片參考:http://sat2.hp.infoseek.co.jp/taiwan/tctv.jpg
它的用途在於讓收視戶調整電視影像畫質,如色差、亮度、水平垂直等,中間線條由粗到細,細線越多表示畫質越清晰細膩,上下為電視台的名稱,中間報時
早期老三台節目開播前會播放檢驗圖,檢驗圖背景音樂為當季八點檔連續劇主題曲或愛國歌曲,結束後開始唱國歌,緊接著播放政令宣導或今日節目表,然後播出今天的節目,在當時是為了配合政府「節約能源」政策,而後來電視收播或信號測試時也會播放檢驗圖,大陸中央台(CCTV)也會在非特定日期的下午播放檢驗圖做「停機檢修」,背景為古典樂或無聲
而現在逐漸進入數位電視時代,節目大多24小時連續播放,檢驗圖也越來越少見了
而台灣早期電視所播放檢驗圖為Philips PM5544樣式,大約在1970年代出現
以下摘錄維基百科的Philips PM5544檢驗圖的英文說明:
The Philips PM5544 is a television pattern generator, most commonly used to provide a television station with a complex test card. It has been in use since the dawn of colour television, and is the most commonly used test card generator, with only the SMPTE bars and the BBC Test Card F coming close to its usage.
The BBC occasionally uses a modified version, Test Card G. Many broadcasters using a 625 line PAL system use some form of the PM5544 test pattern.
Since the PM5544 is geared towards the PAL colour coding system, this test pattern is uncommon among NTSC broadcasters, though some, such as CBFT, CBMT, WBOY-TV and WNYW, have used a 525 line version of the PM5544 in the past [1], [2].
The PM5544 was also in widespread use in Australia for many years, most notably with the ABC and SBS. Some commercial stations also used the PM5544.
A widescreen capable version of the unit, the PM5644, also exists.
另外還有其他種類的檢驗圖,供您參考
相關問答: 關於電視中所出現之圖形(色碼圖)的問題?
希望能解決您的問題
圖片參考:http://tw.yimg.com/i/tw/ugc/rte/smiley_1.gif
By William
at 2009-02-24T16:01
at 2009-02-24T16:01
好懷念喔... XD
倒數整點還有 "滴" 的聲音
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