H264 編碼器 市場調(diào)查

1、.：.；H.264編碼器市場調(diào)研市場現(xiàn)有產(chǎn)品LSI LogicH.264 VLE4000 用于廣播的編碼器LSI邏輯推出的VLE4000，是全世界首個(gè)用于新興H.264/MPEG-4 AVC規(guī)范的實(shí)時(shí)編碼器。VLE4000實(shí)時(shí)H.264編碼器適用于機(jī)架式PC，包含一個(gè)SDI輸入卡和視頻緊縮卡。VLE4000以實(shí)時(shí)方式進(jìn)展緊縮，到達(dá)全full D1規(guī)范解析度30幀/秒。以MPEG-2傳輸碼流緊縮的視頻在多點(diǎn)傳送以太網(wǎng)上發(fā)出，然后經(jīng)過我們的VLD4000 H.264實(shí)時(shí)解碼器接納。VLE4000已可供貨，適用于早期運(yùn)用，實(shí)驗(yàn)及H.264評價(jià)。產(chǎn)品特性 VLE4000包含一個(gè)實(shí)時(shí)H.264規(guī)范明晰度

2、編碼器H.264/MPEG-4 AVC編碼，到達(dá)Main Profile Level 3杰出的解碼質(zhì)量和驗(yàn)證平臺產(chǎn)品優(yōu)勢 廣播、網(wǎng)絡(luò)碼流、消費(fèi)類電子和內(nèi)容發(fā)明環(huán)境中專業(yè)級數(shù)字視頻的理想選擇緊縮率是MPEG-2的兩倍鏈接：lsilogic/products/H264_VLE4000/先鋒先鋒在“2005 International CES上演示了采用H.264/MPEG-4 AVC方式的影像實(shí)時(shí)編碼。該公司曾在2004年10月舉行的“CEATEC 2004上以1.5Mbit/秒的速度演示過720480像素的SDTV影像的編碼，HDTV影像的演示尚屬初次。 將19201080像素、60幀/秒的HD

3、TV影像輸入設(shè)備，然后進(jìn)展了實(shí)時(shí)編碼。編碼器支持的協(xié)議為Main Profile、級別為4.1。編碼數(shù)據(jù)速度為可變，平均值為9Mbit/秒。 為實(shí)現(xiàn)這一編碼速度，在一個(gè)機(jī)殼內(nèi)嵌入了3枚支持SDTV編碼的板卡。聽說，在CEATEC上只運(yùn)用了一枚這樣的板卡。此次將畫面按上下方向分為三個(gè)區(qū)域，每個(gè)區(qū)域的編碼處置由一枚板卡擔(dān)任。同時(shí)還對因分區(qū)而呵斥的銜接部位的像素的銜接性進(jìn)展了處置。各區(qū)域的編碼處置中分別運(yùn)用了4個(gè)美國德州儀器公司消費(fèi)的DSP，這樣在編碼處置中合計(jì)運(yùn)用了12個(gè)DSP。另外，影像數(shù)據(jù)加載到MPEG-2 transport stream上傳送、在另外的機(jī)頂盒中進(jìn)展解碼處置。三菱電機(jī)便攜H.

4、264編碼器 面向單頻段電視三菱電機(jī)2005年2月15日在公司研發(fā)成果展現(xiàn)會上演示了H.264/MPEG-4 AVC以下簡稱H.264規(guī)格小型DSP編碼設(shè)備。利用1個(gè)DSP即可實(shí)時(shí)地對基于日本定于2005年度末開播的挪動微波數(shù)字電視即單頻段電視規(guī)格的視頻數(shù)據(jù)進(jìn)展編碼處置。H.264是一種以2Mbit/秒的數(shù)據(jù)編碼速度，即可實(shí)現(xiàn)畫質(zhì)媲美于8Mbit/秒MPEG-2規(guī)格的高緊縮率視頻編碼方式。單頻段電視規(guī)格的處置上限為QVGA320240像素格式、15幀/秒，而這次的編碼器卻“可以進(jìn)展超越20幀/秒的處置三菱電機(jī)。運(yùn)轉(zhuǎn)這種編碼器的DSP任務(wù)頻率為600MHz。處置延遲約為0.2秒。 開發(fā)出在DSP

5、上運(yùn)轉(zhuǎn)的H.264編碼器之后，就能根據(jù)輸入信號的像素?cái)?shù)、幀速度、拍攝對象或相機(jī)動作的大小，以及是轉(zhuǎn)播還是監(jiān)控等各種不同的條件，對參數(shù)進(jìn)展調(diào)整。“尤其是監(jiān)控用途，根據(jù)不同情況而運(yùn)用的參數(shù)區(qū)別很大三菱電機(jī)。 這次的編碼器設(shè)備非常小，大約為B5尺寸?！凹僭O(shè)是面向電視臺的固定型設(shè)備，就沒有必要設(shè)計(jì)得太小。而我們那么希望它能用于采訪現(xiàn)場的轉(zhuǎn)播和監(jiān)控業(yè)務(wù)三菱電機(jī)。Envivio envivio/index.php HYPERLINK envivio/products/bssdenc_overview.php Broadcast Series SD Encoders：14Caster B3Fourth Ge

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