Designs and develops stand-alone video data's compress code and decompress decode system . realizes motion picture's compress code and decompress decode in real time, and self-adaptation control of data flow 開發(fā)了實(shí)時(shí)運(yùn)動(dòng)圖像視頻壓縮編碼和解壓縮解碼系統(tǒng),實(shí)現(xiàn)了脫機(jī)視頻壓縮編碼和解壓縮解碼系統(tǒng)的實(shí)時(shí)圖像處理和數(shù)據(jù)流量的自適應(yīng)控制。
Information security technology and multimedia communication technology are hotspots in the information science technology, and secrecy coding and compress coding are keys to realize information security and multimedia communication 信息安全技術(shù)和多媒體通信技術(shù)是當(dāng)今信息科學(xué)研究領(lǐng)域的熱點(diǎn)課題,而保密編碼和壓縮編碼則是實(shí)現(xiàn)信息安全和多媒體通信的關(guān)鍵。
Zerotree makes use of the relativity of child band, which is a meaningful breakthrough based on wavelet image compress coding . ezw and spiht algorithms based on zerotree structure, which enhance the image compress ratio largely, are discussed and analyzed in detail 在小波系數(shù)的壓縮方法中,小波系數(shù)的零樹方法充分利用了相應(yīng)子帶間的相關(guān)性,是基于小波圖像壓縮編碼的一個(gè)有意義的突破。
This project is one of the subprojects of high-speed wireless video transmission system . using dsp technology and relevant asic device to realize motion picture's compress code and decompress decode in real time is its main task 本課題是高速無線視頻傳輸系統(tǒng)項(xiàng)目的一個(gè)子課題,屬于信源壓縮編碼和信宿解壓縮解碼部分,主要任務(wù)就是運(yùn)用dsp技術(shù)及相關(guān)的asic器件實(shí)現(xiàn)實(shí)時(shí)的運(yùn)動(dòng)圖像壓縮編解碼。
This paper introduces a method to realize stand-alone video data's compress code and decompress decode and reliable transmission of video data, and expounds the design processing and hardware and software development 本文介紹了一種實(shí)現(xiàn)脫機(jī)視頻壓縮編碼和解壓縮解碼及視頻數(shù)據(jù)可靠通信的方法,詳細(xì)論述了作為高速無線視頻傳輸系統(tǒng)核心部分的運(yùn)動(dòng)圖像實(shí)時(shí)壓縮編碼和解壓縮解碼的軟硬件設(shè)計(jì)和研制開發(fā)過程。
The traditional image processing technology mainly concentrates in the image to obtain, transformation, strengthen,, compress coding etc, and along with new tool, the new method appears continuously, these picture processing technology also develops continuously 傳統(tǒng)的圖像處理技術(shù)主要集中在圖像的獲取,變換,增強(qiáng),恢復(fù),壓縮編碼的方面,并且隨著新工具,新方法的不斷出現(xiàn),這些圖像處理技術(shù)也在不斷發(fā)展。
The survey of vidio compressed coding is introduced in this paper at first . then the vidio compressed method based on transform coding and the content of mpeg-2 standard are presented . the hardware realization method of mpeg-2 vidio compressed decoder is given in detail 本文首先介紹視頻壓縮編碼發(fā)展的概況;然后介紹基于變換編碼的視頻壓縮方法,并簡(jiǎn)要闡述mpeg-2標(biāo)準(zhǔn)的內(nèi)容;隨后給出了一種基于專用芯片的mpeg-2視頻壓縮編解碼器硬件實(shí)現(xiàn)方法。
The subimage of the lowest frequency ( ll4 ) is carried out lossless compressed coding; 2 the subimages on diagonal direction of the highest frequency ( hhl ) is abandoned and is not carried out coding, because it is of great probability for zero, and it little affects visual 其主要包括對(duì)最低頻子帶單獨(dú)進(jìn)行無損壓縮編碼,對(duì)最高頻對(duì)角線方向子帶舍去不編碼。對(duì)其余各子帶根據(jù)視覺特點(diǎn)的不同,分別分配不同的比特?cái)?shù)并按其進(jìn)行零樹量化,最后再游程編碼。
It is significant in both theoretics and practicality to combine the motion estimate technique and research of data compressed coding to solve the problem of huge information data in video, which is an important question for discussion in image processing field and image communication field 利用運(yùn)動(dòng)估計(jì)技術(shù),結(jié)合對(duì)數(shù)據(jù)壓縮編碼的研究,解決視頻消息數(shù)據(jù)量大的問題,具有重要的理論和實(shí)際意義,是一個(gè)圖像處理領(lǐng)域和圖像通信領(lǐng)域極其重要的研究課題。
With the rapid development of communications and internet technology, especially the recent 20 years, speech compressing coding technology has been widely used and plays a very important role in mobile communications, satellite communications, multimedia communications and ip-phone communications 隨著通信、計(jì)算機(jī)網(wǎng)絡(luò)等技術(shù)的飛速發(fā)展,尤其是最近20年,語音壓縮編碼技術(shù)在移動(dòng)通信、衛(wèi)星通信、多媒體技術(shù)以及ip電話通信中得到普遍應(yīng)用,并起著舉足輕重的作用。