It imposes some bad impact on video implement over network and imposes many challenges to the traditional nonscalable video coding technology which is not efficient for transmission video over the error-prone . then the scalable video coding technology was proposed, which can provide a rang of bitrate change and its redundant video content compensate the transmission error, but loss coding efficiency 传统的不可分级编码技术已经不能满足视频在这类网络上的传输需要,就提出了可分级编码技术,它能提供一定的位率可变范围,同时因可分级性而带来的冗余信息也在一定程度上补偿了因传输误差而引起的视频内容的损失,但也因此而损失了编码效率。
Aiming at head-and-shoulder video sequences often showed in those fields such as visual telephone, video conference and etc ., with human visual characterstic to best advantage, a scalable video coding method based on human face detection and tracing is presented in this paper . the reconstructed image sequences with good subjective quality can be obtained with very-low bitrate 本文在充分考虑人眼视觉特性的基础上,针对可视电话、视频电视会议等领域经常出现的视频头肩序列图像,提出了一种面向人脸检测与跟踪的视频分级编码方法,在极低比特率的情况下,接收端仍能获得视觉质量较好的恢复序列图像
In term of bandwidth fluctuation of internet, proposes two types of scalable video coding scheme adapted to transmission of internet, that is, a fine-granularity spatially scalable video coding and a progressive fine-granularity scalable video coding . meanwhile, proposes a wavelet transform's algorithm using for lower rate coding 同时针对internet上传输带宽波动性,提出了两种可用于internet传输的可伸缩视频编码方案--fgss(精细空间可伸缩视频编码)和pfgs(渐进精细可伸缩视频编码),提出了用于极低码率的小波变换编码算法。
In term of bandwidth fluctuation of internet, proposes two types of scalable video coding scheme adapted to transmission of internet, that is, a fine-granularity spatially scalable video coding and a progressive fine-granularity scalable video coding . meanwhile, proposes a wavelet transform's algorithm using for lower rate coding 同时针对internet上传输带宽波动性,提出了两种可用于internet传输的可伸缩视频编码方案--fgss(精细空间可伸缩视频编码)和pfgs(渐进精细可伸缩视频编码),提出了用于极低码率的小波变换编码算法。
In term of bandwidth fluctuation of internet, proposes two types of scalable video coding scheme adapted to transmission of internet, that is, a fine-granularity spatially scalable video coding and a progressive fine-granularity scalable video coding . meanwhile, proposes a wavelet transform's algorithm using for lower rate coding 同时针对internet上传输带宽波动性,提出了两种可用于internet传输的可伸缩视频编码方案--fgss(精细空间可伸缩视频编码)和pfgs(渐进精细可伸缩视频编码),提出了用于极低码率的小波变换编码算法。
In past decade, scalable video coding, allowing partial decoding at a variety of resolution and quality levels from a single compressed stream, is widely considered as a promising resolution for efficient signal representation and transmission in a network environment, such as wireless-net, internet 经过近十年的研究,可扩展视频编码被认为是一种在无线、因特网等网络环境下进行视频传输的编码解决方案,它仅用一个可调整的码流就可以满足不同用户的个性化需求。