An error concealment method for video communications considering both frequency and spatial domains 视频通信中频域和空域相结合的错误掩盖技术
But when the interference and desired signal ’ s frequency are overlapped , we must use adaptive antenna to separate them in spatial domain 但是当干扰与跳频信号频率相同时,仍会形成干扰。
The important is embedded into frequency domain , which has good robustness . the unimportant with large capacity , is embedded into spatial domain 重要部分嵌入鲁棒性强的dct域,非重要部分嵌入水印容量大的空域。
At the same time because of localization of time domain ( spatial domain ) and frequency domain wavelet transform is superior to fourier transform 同时,小波还具有时频(空间?频率)局部化的特点,因而在很多应用场合优于fourier变换。
However , the other scheme in spatial domain can easily tackle these problems via fir filter , providing more flexibility and better quality 由于这种方法是基于fir滤波的缩放,滤波的过程会引入大量的乘累加运算,很难满足视频处理的实时性要求。