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 开发了实时运动图像视频压缩编码和解压缩解码系统,实现了脱机视频压缩编码和解压缩解码系统的实时图像处理和数据流量的自适应控制。
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 信息安全技术和多媒体通信技术是当今信息科学研究领域的热点课题,而保密编码和压缩编码则是实现信息安全和多媒体通信的关键。
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 在小波系数的压缩方法中,小波系数的零树方法充分利用了相应子带间的相关性,是基于小波图像压缩编码的一个有意义的突破。
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 本课题是高速无线视频传输系统项目的一个子课题,属于信源压缩编码和信宿解压缩解码部分,主要任务就是运用dsp技术及相关的asic器件实现实时的运动图像压缩编解码。
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 本文介绍了一种实现脱机视频压缩编码和解压缩解码及视频数据可靠通信的方法,详细论述了作为高速无线视频传输系统核心部分的运动图像实时压缩编码和解压缩解码的软硬件设计和研制开发过程。
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 传统的图像处理技术主要集中在图像的获取,变换,增强,恢复,压缩编码的方面,并且随着新工具,新方法的不断出现,这些图像处理技术也在不断发展。
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 本文首先介绍视频压缩编码发展的概况;然后介绍基于变换编码的视频压缩方法,并简要阐述mpeg-2标准的内容;随后给出了一种基于专用芯片的mpeg-2视频压缩编解码器硬件实现方法。
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 其主要包括对最低频子带单独进行无损压缩编码,对最高频对角线方向子带舍去不编码。对其余各子带根据视觉特点的不同,分别分配不同的比特数并按其进行零树量化,最后再游程编码。
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 利用运动估计技术,结合对数据压缩编码的研究,解决视频消息数据量大的问题,具有重要的理论和实际意义,是一个图像处理领域和图像通信领域极其重要的研究课题。
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 随着通信、计算机网络等技术的飞速发展,尤其是最近20年,语音压缩编码技术在移动通信、卫星通信、多媒体技术以及ip电话通信中得到普遍应用,并起着举足轻重的作用。