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更多>>高清電視的發(fā)展與石英晶體息息相關(guān)
來源:http://konuaer.com 作者:康華爾電子 2024年01月05
高清電視(HDTV)是繼彩色電視之后視頻廣播領(lǐng)域最重大的突破。它通過提供比模擬廣播視頻更多細節(jié)和清晰度的更寬的圖像來增強觀看體驗。
高清已經(jīng)在全球范圍內(nèi)嶄露頭角。2006年初,高清廣播在12個國家播出:美國、加拿大、日本、澳大利亞、韓國、中國、德國和奧地利,以及北歐市場(瑞典、芬蘭、丹麥和挪威)。到2005年底,美國有1900萬戶家庭擁有高清電視機(占電視家庭總數(shù)的17%),其中1100萬戶家庭觀看高清廣播。與此同時,14%(670萬)的日本家庭擁有高清電視。
在全球范圍內(nèi),到2010年底,高清家庭的數(shù)量預計將達到1.74億,占電視家庭的22%。這一數(shù)字在美國為59%,在日本為66%,在西歐為30%。北美的特點是美國的模擬截止時間為2009年2月17日,而拉丁美洲目前是DTT(數(shù)字地面電視)標準的開放市場;盡管如此,預計在未來幾個月內(nèi)將作出決定,開始為這一地區(qū)增加定義。大多數(shù)預測都是基于TV House Hold數(shù)字,以及對模擬截止時間的預期得出的。
高清電視的基本原理常見問題
高清電視的基本概念是在保持投影尺寸的情況下,通過提供更高的分辨率來提高清晰度。(增加像素數(shù))。
大多數(shù)提議的模擬和數(shù)字高清電視系統(tǒng)都在朝著水平和垂直像素增加大約100%的方向努力。(提案大約每幀1mb,大約1000行乘1000個水平點)。這通常會導致垂直和水平油田方面的兩到三倍的改善。大多數(shù)HDTV提案還將寬高比從4/3改為16/9,使圖像與影院標準兼容。
CTS晶振如何支援高清電視廣播設(shè)備?
隨著高分辨率視頻點播(VOD)和視頻互聯(lián)網(wǎng)協(xié)議(IP)應(yīng)用需求的增長,設(shè)備制造商需要高頻參考vcxo和時鐘振蕩器來加密和解碼高分辨率視頻數(shù)據(jù)包。這種頻率源的精度范圍從+/-50PPM到+/-25PPM,在12KHz至20MHz帶寬范圍內(nèi)具有<1pS RMS的極低噪聲抖動性能。所需的兩個最常見頻率是74.250 MHz和74.1258MHz或其倍數(shù)(頻率可能根據(jù)每個設(shè)備制造商使用的設(shè)計方法而變化)。
CTS原廠編碼 | 生產(chǎn)商 | 型號 | 類型 | 頻率 | 電壓 | 頻率穩(wěn)定度 |
1380100-004 | CTS晶振 | - | OCXO | 20 MHz | 3.3V | 10ppb |
334L1000B3C2T | CTS晶振 | 334P/L | VCXO | 100 MHz | 2.5V | ±50ppm |
334L1000B3C3T | CTS晶振 | 334P/L | VCXO | 100 MHz | 3.3V | ±50ppm |
334L1000B3I2T | CTS晶振 | 334P/L | VCXO | 100 MHz | 2.5V | ±50ppm |
334L1000B3I3T | CTS晶振 | 334P/L | VCXO | 100 MHz | 3.3V | ±50ppm |
334L1000B4C2T | CTS晶振 | 334P/L | VCXO | 100 MHz | 2.5V | ±30ppm |
334L1000B4C3T | CTS晶振 | 334P/L | VCXO | 100 MHz | 3.3V | ±30ppm |
334L1000B4I2T | CTS晶振 | 334P/L | VCXO | 100 MHz | 2.5V | ±30ppm |
334L1000B4I3T | CTS晶振 | 334P/L | VCXO | 100 MHz | 3.3V | ±30ppm |
334L1000B5C2T | CTS晶振 | 334P/L | VCXO | 100 MHz | 2.5V | ±25ppm |
334L1000B5C3T | CTS晶振 | 334P/L | VCXO | 100 MHz | 3.3V | ±25ppm |
334L1062B3C2T | CTS晶振 | 334P/L | VCXO | 106.25 MHz | 2.5V | ±50ppm |
334L1062B3C3T | CTS晶振 | 334P/L | VCXO | 106.25 MHz | 3.3V | ±50ppm |
334L1062B3I2T | CTS晶振 | 334P/L | VCXO | 106.25 MHz | 2.5V | ±50ppm |
334L1062B3I3T | CTS晶振 | 334P/L | VCXO | 106.25 MHz | 3.3V | ±50ppm |
334L1062B4C2T | CTS晶振 | 334P/L | VCXO | 106.25 MHz | 2.5V | ±30ppm |
334L1062B4C3T | CTS晶振 | 334P/L | VCXO | 106.25 MHz | 3.3V | ±30ppm |
334L1062B4I2T | CTS晶振 | 334P/L | VCXO | 106.25 MHz | 2.5V | ±30ppm |
334L1062B4I3T | CTS晶振 | 334P/L | VCXO | 106.25 MHz | 3.3V | ±30ppm |
334L1062B5C2T | CTS晶振 | 334P/L | VCXO | 106.25 MHz | 2.5V | ±25ppm |
334L1062B5C3T | CTS晶振 | 334P/L | VCXO | 106.25 MHz | 3.3V | ±25ppm |
334L1228B3C2T | CTS晶振 | 334P/L | VCXO | 122.88 MHz | 2.5V | ±50ppm |
334L1228B3C3T | CTS晶振 | 334P/L | VCXO | 122.88 MHz | 3.3V | ±50ppm |
334L1228B3I2T | CTS晶振 | 334P/L | VCXO | 122.88 MHz | 2.5V | ±50ppm |
334L1228B3I3T | CTS晶振 | 334P/L | VCXO | 122.88 MHz | 3.3V | ±50ppm |
334L1228B4C2T | CTS晶振 | 334P/L | VCXO | 122.88 MHz | 2.5V | ±30ppm |
334L1228B4C3T | CTS晶振 | 334P/L | VCXO | 122.88 MHz | 3.3V | ±30ppm |
334L1228B4I2T | CTS晶振 | 334P/L | VCXO | 122.88 MHz | 2.5V | ±30ppm |
334L1228B4I3T | CTS晶振 | 334P/L | VCXO | 122.88 MHz | 3.3V | ±30ppm |
334L1228B5C2T | CTS晶振 | 334P/L | VCXO | 122.88 MHz | 2.5V | ±25ppm |
334L1228B5C3T | CTS晶振 | 334P/L | VCXO | 122.88 MHz | 3.3V | ±25ppm |
334L1250B3C2T | CTS晶振 | 334P/L | VCXO | 125 MHz | 2.5V | ±50ppm |
334L1250B3C3T | CTS晶振 | 334P/L | VCXO | 125 MHz | 3.3V | ±50ppm |
334L1250B3I2T | CTS晶振 | 334P/L | VCXO | 125 MHz | 2.5V | ±50ppm |
334L1250B3I3T | CTS晶振 | 334P/L | VCXO | 125 MHz | 3.3V | ±50ppm |
334L1250B4C2T | CTS晶振 | 334P/L | VCXO | 125 MHz | 2.5V | ±30ppm |
334L1250B4C3T | CTS晶振 | 334P/L | VCXO | 125 MHz | 3.3V | ±30ppm |
334L1250B4I2T | CTS晶振 | 334P/L | VCXO | 125 MHz | 2.5V | ±30ppm |
334L1250B4I3T | CTS晶振 | 334P/L | VCXO | 125 MHz | 3.3V | ±30ppm |
334L1250B5C2T | CTS晶振 | 334P/L | VCXO | 125 MHz | 2.5V | ±25ppm |
334L1250B5C3T | CTS晶振 | 334P/L | VCXO | 125 MHz | 3.3V | ±25ppm |
334L1320B3C2T | CTS晶振 | 334P/L | VCXO | 132 MHz | 2.5V | ±50ppm |
334L1320B3C3T | CTS晶振 | 334P/L | VCXO | 132 MHz | 3.3V | ±50ppm |
334L1320B3I2T | CTS晶振 | 334P/L | VCXO | 132 MHz | 2.5V | ±50ppm |
334L1320B3I3T | CTS晶振 | 334P/L | VCXO | 132 MHz | 3.3V | ±50ppm |
334L1320B4C2T | CTS晶振 | 334P/L | VCXO | 132 MHz | 2.5V | ±30ppm |
334L1320B4C3T | CTS晶振 | 334P/L | VCXO | 132 MHz | 3.3V | ±30ppm |
334L1320B4I2T | CTS晶振 | 334P/L | VCXO | 132 MHz | 2.5V | ±30ppm |
334L1320B4I3T | CTS晶振 | 334P/L | VCXO | 132 MHz | 3.3V | ±30ppm |
334L1320B5C2T | CTS晶振 | 334P/L | VCXO | 132 MHz | 2.5V | ±25ppm |
334L1320B5C3T | CTS晶振 | 334P/L | VCXO | 132 MHz | 3.3V | ±25ppm |
334L1485B3C2T | CTS晶振 | 334P/L | VCXO | 148.5 MHz | 2.5V | ±50ppm |
334L1485B3C3T | CTS晶振 | 334P/L | VCXO | 148.5 MHz | 3.3V | ±50ppm |
334L1485B3I2T | CTS晶振 | 334P/L | VCXO | 148.5 MHz | 2.5V | ±50ppm |
334L1485B3I3T | CTS晶振 | 334P/L | VCXO | 148.5 MHz | 3.3V | ±50ppm |
334L1485B4C2T | CTS晶振 | 334P/L | VCXO | 148.5 MHz | 2.5V | ±30ppm |
334L1485B4C3T | CTS晶振 | 334P/L | VCXO | 148.5 MHz | 3.3V | ±30ppm |
334L1485B4I2T | CTS晶振 | 334P/L | VCXO | 148.5 MHz | 2.5V | ±30ppm |
334L1485B4I3T | CTS晶振 | 334P/L | VCXO | 148.5 MHz | 3.3V | ±30ppm |
334L1485B5C2T | CTS晶振 | 334P/L | VCXO | 148.5 MHz | 2.5V | ±25ppm |
334L1485B5C3T | CTS晶振 | 334P/L | VCXO | 148.5 MHz | 3.3V | ±25ppm |
334L1500B3C2T | CTS晶振 | 334P/L | VCXO | 150 MHz | 2.5V | ±50ppm |
334L1500B3C3T | CTS晶振 | 334P/L | VCXO | 150 MHz | 3.3V | ±50ppm |
334L1500B3I2T | CTS晶振 | 334P/L | VCXO | 150 MHz | 2.5V | ±50ppm |
334L1500B3I3T | CTS晶振 | 334P/L | VCXO | 150 MHz | 3.3V | ±50ppm |
334L1500B4C2T | CTS晶振 | 334P/L | VCXO | 150 MHz | 2.5V | ±30ppm |
334L1500B4C3T | CTS晶振 | 334P/L | VCXO | 150 MHz | 3.3V | ±30ppm |
334L1500B4I2T | CTS晶振 | 334P/L | VCXO | 150 MHz | 2.5V | ±30ppm |
334L1500B4I3T | CTS晶振 | 334P/L | VCXO | 150 MHz | 3.3V | ±30ppm |
334L1500B5C2T | CTS晶振 | 334P/L | VCXO | 150 MHz | 2.5V | ±25ppm |
334L1500B5C3T | CTS晶振 | 334P/L | VCXO | 150 MHz | 3.3V | ±25ppm |
334L1536B3C2T | CTS晶振 | 334P/L | VCXO | 153.6 MHz | 2.5V | ±50ppm |
334L1536B3C3T | CTS晶振 | 334P/L | VCXO | 153.6 MHz | 3.3V | ±50ppm |
334L1536B3I2T | CTS晶振 | 334P/L | VCXO | 153.6 MHz | 2.5V | ±50ppm |
334L1536B3I3T | CTS晶振 | 334P/L | VCXO | 153.6 MHz | 3.3V | ±50ppm |
334L1536B4C2T | CTS晶振 | 334P/L | VCXO | 153.6 MHz | 2.5V | ±30ppm |
334L1536B4C3T | CTS晶振 | 334P/L | VCXO | 153.6 MHz | 3.3V | ±30ppm |
334L1536B4I2T | CTS晶振 | 334P/L | VCXO | 153.6 MHz | 2.5V | ±30ppm |
334L1536B4I3T | CTS晶振 | 334P/L | VCXO | 153.6 MHz | 3.3V | ±30ppm |
334L1536B5C2T | CTS晶振 | 334P/L | VCXO | 153.6 MHz | 2.5V | ±25ppm |
334L1536B5C3T | CTS晶振 | 334P/L | VCXO | 153.6 MHz | 3.3V | ±25ppm |
334L1555B3C2T | CTS晶振 | 334P/L | VCXO | 155.52 MHz | 2.5V | ±50ppm |
334L1555B3C3T | CTS晶振 | 334P/L | VCXO | 155.52 MHz | 3.3V | ±50ppm |
334L1555B3I2T | CTS晶振 | 334P/L | VCXO | 155.52 MHz | 2.5V | ±50ppm |
334L1555B3I3T | CTS晶振 | 334P/L | VCXO | 155.52 MHz | 3.3V | ±50ppm |
334L1555B4C2T | CTS晶振 | 334P/L | VCXO | 155.52 MHz | 2.5V | ±30ppm |
334L1555B4C3T | CTS晶振 | 334P/L | VCXO | 155.52 MHz | 3.3V | ±30ppm |
334L1555B4I2T | CTS晶振 | 334P/L | VCXO | 155.52 MHz | 2.5V | ±30ppm |
334L1555B4I3T | CTS晶振 | 334P/L | VCXO | 155.52 MHz | 3.3V | ±30ppm |
334L1555B5C2T | CTS晶振 | 334P/L | VCXO | 155.52 MHz | 2.5V | ±25ppm |
334L1555B5C3T | CTS晶振 | 334P/L | VCXO | 155.52 MHz | 3.3V | ±25ppm |
334L1562B3C2T | CTS晶振 | 334P/L | VCXO | 156.25 MHz | 2.5V | ±50ppm |
334L1562B3C3T | CTS晶振 | 334P/L | VCXO | 156.25 MHz | 3.3V | ±50ppm |
334L1562B3I2T | CTS晶振 | 334P/L | VCXO | 156.25 MHz | 2.5V | ±50ppm |
334L1562B3I3T | CTS晶振 | 334P/L | VCXO | 156.25 MHz | 3.3V | ±50ppm |
334L1562B4C2T | CTS晶振 | 334P/L | VCXO | 156.25 MHz | 2.5V | ±30ppm |
334L1562B4C3T | CTS晶振 | 334P/L | VCXO | 156.25 MHz | 3.3V | ±30ppm |
334L1562B4I2T | CTS晶振 | 334P/L | VCXO | 156.25 MHz | 2.5V | ±30ppm |
334L1562B4I3T | CTS晶振 | 334P/L | VCXO | 156.25 MHz | 3.3V | ±30ppm |
334L1562B5C2T | CTS晶振 | 334P/L | VCXO | 156.25 MHz | 2.5V | ±25ppm |
334L1562B5C3T | CTS晶振 | 334P/L | VCXO | 156.25 MHz | 3.3V | ±25ppm |
334L2000B3C2T | CTS晶振 | 334P/L | VCXO | 200 MHz | 2.5V | ±50ppm |
334L2000B3C3T | CTS晶振 | 334P/L | VCXO | 200 MHz | 3.3V | ±50ppm |
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