【摘要】 音频视频的同步问题是多媒体应用技术中的一个关键问题。在文中,提出了一种新的音视频同步的算法。对DCT变换的研究表明,DCT中频系数有相似的数量级,改变2个系数的相互关系不会引起图像的严重降质。把音频信号作为隐藏信号,利用DCT中频系数这个性质及量化表的特性,修改DCT系数间的相互关系,来隐藏音频数据。在接收端再根据系数之间的关系恢复音频信号,从而达到音视频混合压缩同步传输的目的。更多还原

【Abstract】 A mixing compression algorithm based on the correlation of DCT coefficients is presented in this paper.Study for DCT indicates that the intermediate frequency coefficients have similar magnitude,and the images will not cause to decay badly if change the relation of 2 coefficients.Make use of the characteristic and the quantization table;alter the relation of 2 intermediate frequency coefficients to hiding audio data.At receiver,reconstruct the video images and audio data.This algorithm achieves the mixing compression and synchronization transmission.Simulation results show that the effect of the reconstructed audio data and video images are well.更多还原