The thesis focuses on motion picture data compression techniques used in video communication , proposes modified implementations of two kernel algorithms in this field 本论文对视频通信中图像(包括静止图像和运动图像序列)压缩部分的相关技术进行了研究,对两个核心算法进行了改进。
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,本文给出了图像压缩的一般概念,回顾了图像压缩技术的发展,并简要介绍了几种常用的图像压缩编码方法。
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为一种高效率的声频压缩技术,具有将语音档案压缩达10 : 1到12 : 1的压缩效率,并能维持接近cd数位信号的保真度及高音效品质。
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 当然,随着压缩技术及高密度光盘技术的进步,集光学、电子学、机械等多学科于一身的数字拾取系统的设计也必将达到新的高度。
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 第二章主要介绍了嵌入式网络图像监控的相关技术,包括图像压缩技术、嵌入式处理器、嵌入式操作系统和图像传输技术。
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,本文还涵括了本人关于压缩技术中一些基本问题的相关结果,包括二值分组算术编码快速算法的设计和多项式预测器的性能分析两部分。
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 近年来,随着数字通信技术的迅速发展,图象压缩技术的日渐成熟,以及相关国际标准的制定和网络的兴起,视频通信逐渐应用到了人们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 作者比较了26个健康的早产儿和24个足月的婴儿的纵向测量力呼气流量,分别在他们一岁和两岁的时候,通过快速胸加压法产生的体积来进行测定。
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 出于图象存储和图象通信的考虑,良好的图象压缩技术不仅能够实现高压缩率和高保真度,还应该满足诸如渐进传输、图象渐现等网络应用的需要。
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 ) 压缩技术包括一种专门的图像压缩方案, jpeg实现和一种专门针对数字化视频数据的视频压缩器(压缩比可达8 1 ,如果去掉时间冗余,比率可达25 1 )