The thesis focuses on motion picture data compression techniques used in video communication , proposes modified implementations of two kernel algorithms in this field 本論文對視頻通信中圖像(包括靜止圖像和運動圖像序列)壓縮部分的相關(guān)技術(shù)進行了研究,對兩個核心算法進行了改進。
Firstly , the general conception of image compression is presented , the brief developing history of image compression technique is reviewed and several image compression algorithm are introduced briefly 首先,本文給出了圖像壓縮的一般概念,回顧了圖像壓縮技術(shù)的發(fā)展,并簡要介紹了幾種常用的圖像壓縮編碼方法。
What is mp3 ? mp3 is a new sound compression technique that can effectively compress sound files by a ratio of 10 : 1 or even 12 : 1 , while maintaining high fidelity and outstanding sound quality Mp3為一種高效率的聲頻壓縮技術(shù),具有將語音檔案壓縮達10 : 1到12 : 1的壓縮效率,并能維持接近cd數(shù)位信號的保真度及高音效品質(zhì)。
However , the development of digital collective system must have attained high level , which includes optics , electronics and mechanics etc . by the progress of compression technique and hd disc technique 當然,隨著壓縮技術(shù)及高密度光盤技術(shù)的進步,集光學(xué)、電子學(xué)、機械等多學(xué)科于一身的數(shù)字拾取系統(tǒng)的設(shè)計也必將達到新的高度。
Subsequently , correlative techniques of embedded networking image surveillant terminal are introduced in chapter two , including image compression technique , embedded mcu , embedded operating system and network transmission technique 第二章主要介紹了嵌入式網(wǎng)絡(luò)圖像監(jiān)控的相關(guān)技術(shù),包括圖像壓縮技術(shù)、嵌入式處理器、嵌入式操作系統(tǒng)和圖像傳輸技術(shù)。
Furthermore , this paper also includes my two results of some basic data compression techniques . one is a rapid algorithm of binary block arithmetic coding ; the other is an analysis of the performance of polynomial predictors 此外,本文還涵括了本人關(guān)于壓縮技術(shù)中一些基本問題的相關(guān)結(jié)果,包括二值分組算術(shù)編碼快速算法的設(shè)計和多項式預(yù)測器的性能分析兩部分。
With the rapid development of digital communication technology , the mature of image compression techniques and the publication of international standards , video communication has came into human ’ s daily life and works 近年來,隨著數(shù)字通信技術(shù)的迅速發(fā)展,圖象壓縮技術(shù)的日漸成熟,以及相關(guān)國際標準的制定和網(wǎng)絡(luò)的興起,視頻通信逐漸應(yīng)用到了人們的日常生活和工作中。
The authors compared longitudinal measurements of forced expiratory flows by the raised volume rapid thoracic compression technique in the first and the second years of life for 26 healthy infants born prematurely vs 24 infants born at full term 作者比較了26個健康的早產(chǎn)兒和24個足月的嬰兒的縱向測量力呼氣流量,分別在他們一歲和兩歲的時候,通過快速胸加壓法產(chǎn)生的體積來進行測定。
A favorable image compression technique can not only achieve high compression ratio and fidelity but also meet such demands such as progression transmission . firstly , the development course of the image compression theories and standards is introduced 出于圖象存儲和圖象通信的考慮,良好的圖象壓縮技術(shù)不僅能夠?qū)崿F(xiàn)高壓縮率和高保真度,還應(yīng)該滿足諸如漸進傳輸、圖象漸現(xiàn)等網(wǎng)絡(luò)應(yīng)用的需要。
The compression techniques are a proprietary image compression scheme , a jpeg implementation and a proprietary video compressor for digitized video data ( leading to a compression ratio of 8 : 1 , and if temporal redundancies are also removed , to a ratio of 25 : 1 ) 壓縮技術(shù)包括一種專門的圖像壓縮方案, jpeg實現(xiàn)和一種專門針對數(shù)字化視頻數(shù)據(jù)的視頻壓縮器(壓縮比可達8 1 ,如果去掉時間冗余,比率可達25 1 )