As to three types of frames in mpeg2 , there are two different types of coding method , which are inter - frame coding and intra - frame coding 在程序中,对于三种不同的帧类型(即i 、 p和b ) ,分别采用了帧内编码和帧间编码两种方式。
The second technique is error tracking . it is implemented at the encoder . it can terminated the error - progagation affects by intra refreshing the affected macroblocks 差错跟踪技术在编码器方实现,它通过把受错误感染的宏块重新采用帧内编码模式来中止错误的扩散。
Simulation results testified that the structure and algorithms in this paper can achieve virtually the same quality with greatly reduced computational requirment compared with cpdt structure 另外,本文还讨论了通过在转码的每一帧中强制加入帧内编码块来提高算法的抗误码能力。
Forth , a novel error control method for internet video communication is proposed , named adaptive intra update . this method can effectively enhance packet loss resilience and improve the quality of decoded video 第四:提出了一种新颖的可应用于因特网视频通信的差错控制方法,称为自适应帧内编码刷新。
Fast image scaling with high fidelity plays a key role in video processing and codec by providing various resolution , reducing bitrates to facilitate video transmission and achieving the best visual quality at the receiver 在视频编码转化中,必须确保帧内编码帧(帧)经过缩放后仍然具有很高的质量,才能使后继运动预测帧的运动补偿误差达到最小化,从而到达较好的视频编码转换效果。
Considering the stability and continuity of face region , and the error propagation effect due to the high error rate in wireless channels , the intra - refresh method is used . the redundant data is not too much owing to the continuity , and the error propagation effect can be stopped accordingly 由于视频中出现的人脸具有稳定性,连续性等特点,同时考虑到无线移动信道由于误码率高而引起差错传播问题,所以采用帧内编码宏块刷新的方法。
The paper studies the theory and coding methods of the low bit rate video recommendation h . 263 + detailedly , realizes real - time software codec based on h . 263 + under linux os , furthermore , finishes some negotiable coding options which can observably improve the coding efficiency , such as advanced prediction mode , advanced intra coding mode , deblocking filter mode and modified quantization mode 263 +的原理和编码方法做了深入的研究,软件实现了基于h 263 +标准的视频编译码器在linux操作系统下的实时编解码,并实现了能显著提高编码效率的几种可选编码模式,主要包括先进预测模式、先进帧内编码模式、块边界滤波模式和改进量化模式等。