摘要
当压缩后的图像码流在实际信道中传输时,不可避免地会发生传输差错或数据分组丢失的现象,这会导致解码器重建图像质量的下降,所以必须要进行差错控制。列举了有噪信道和拥塞网络对DCT编码压缩图像的各种不同影响,并回顾了相应的各种解决方案,包括重同步策略、差错复原、后处理差错掩盖、前处理差错控制等技术。
In the practical transmission of compressed images, the bit error or packet loss is unavoidable, which results in the degradation of the images reconstructed at the decoder. So, error control techniques are required. This article begins with the enumeration of the different kinds of impact of noisy channels and congested networks on compressed images based on DCT coding. Then we review different techniques that can be applied to combatting the impact. These techniques include resynchronization strategies, error resilience, postprocessing error concealment, preprocessing error control.
出处
《南京邮电学院学报（自然科学版）》
2002年第3期90-94,共5页
Journal of Nanjing University of Posts and Telecommunications
