QCIF

The experimental result shows that at the resolution of qcif , the real-time decoding and playing can make success .

实验结果表明，对于qcif分辨率的视频流，可以达到实时解码和播放。

And in the course of realizing this algorithm , the author determined to use QCIF image form according to the characteristic of the monitoring image on spot .

并在实现该算法过程中，根据现场监控图象的特点，确定采用QCIF图象格式？

Test results show that the encoding speed of our encoder can meet the requirements of real-time video monitoring for video sequences with QCIF and CIF size .

测试结果表明，对于QCIF和CIF尺寸的视频，该编码器的编码速度基本可以满足视频监控的要求。

This method can be applied to QCIF , SIF of MPEG 1 and various formats in MPEG 2 with a little modification .

对于QCIF、MPEG－1的SIF以及MPEG－2中的多种格式只需作很少的改动就能适用。

The proposed algorithm is tested on both Class A sequences Akiyo and Class B sequences Foreman ( QCIF ) and satisfactory performance is obtained .

算法在A级测试序列Akiyo和B级测试序列Foreman（QCIF）上测试取得了良好效果。

Through real test , the accurate ratio of vehicles count is over 90 % , the error ratio of speed test is below 5 % and the transmit speed is 25 f / s for QCIF image .

经过实际测试，采用该系统进行车辆计数，其准确率达90%以上，车速检测误差小于5%，对于QCIF格式的道路现场图像能够以每秒25帧的速度进行传输。

The delay time of network is lower than 1 second , and the rate achieve 18F / s under QCIF . So , the system can be used widely in video remote monitor environment , video conference and so on .

本系统通过长时间的运行测试，在CIF格式下，网络延迟小于1秒，传输速率18帧/秒，可以广泛的应用于视频远程监控、视频会议等场合。

Experimental results show that the proposed algorithm gives almost the same image quality and bit rate as that of the full half pixel search and it reduces the computational load by about 57 % for the QCIF H.263 encoder .

实验结果表明该算法能显著地提高半像素搜索速度，并且不会对编码效率和图像质量产生明显的影响。在QCIF格式下采用H.263编码器时实际节省运算量约为57%。

In this thesis , from the extensive experiment results of various QCIF video test sequence , it is clear that the strong correlation of MB type exists in spatial domain , no matter intra I frame or inter P / B frame .

本文实验统计多种QCIF测试序列的编码结果，分析发现不论图像类型是I、P还是B帧，图像编码的宏块类型在空间域都具有极强的相关性。