【摘要】 为了在小尺寸屏幕上保持码流恒定,以使视频流清晰,在帧内预测编码的基础上,提出了一种改进的DCT(Discrete Cosine Transform)编码二次插值优化算法。该算法根据帧内预测编码的DCT变换机制,利用DCT编码的二次插值可以使码流恒定,小尺寸屏幕的块效应减弱,在保持视频流速度稳定的情况下,提高了图像的清晰度。实验结果表明,传统DCT变换在小尺寸屏幕的限制下,块效应明显,而且编码的复杂度较高,而DCT编码二次插值明显比传统算法图像清晰,而且保持了码流的恒定。更多还原

【Abstract】 The size of the screen for popular mobile phones are small currently. In order to maintain the clear video stream without fluctuation,on the basis of the intra prediction encoding,an improved quadratic interpolation of DC T(Discrete Cosine Transform) coding optimization algorithm is proposed.Based on intra predi ction coding of DCT mechanism,the quadratic interpolation using DCT coding can make a constant stream,make the small size of the screen blocking reduce d,and make the video stream enhance clarity while maintaining the speed stabili ty of the image.Experimental results show that traditional DCT transform in the small size of the screen block effects are more obvious,and coding is more com plex.The DCT coding algorithm quadratic interpolation makes the image significa ntly clear,and also maintain a constant stream.更多还原