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Error concealment or correction of speech, image and video signals

机译:错误掩盖或纠正语音,图像和视频信号

摘要

A method of error concealment or correction, suitable for signals such as speech, image and video signals, and particularly for such signals as transmitted over wireless and ATM channels. The method has improved stability for large block sizes and bunched errors. It is based on a modification of the discrete Fourier transform which is equivalent to a permutation of the Fourier coefficients. Thus, as with the conventional Fourier transform, setting a contiguous set of coefficients equal to zero in the transmitted signal enables error concealment techniques to be used at the receiver. However, with the modified transform, the zeroes are not bunched together in the spectrum, so the instability problems that arise when the conventional Fourier transform is used are mollified, and much larger block sizes can be used.
机译:一种隐藏或纠正错误的方法,适用于诸如语音,图像和视频信号之类的信号,尤其适用于通过无线和ATM信道传输的此类信号。该方法提高了针对大块大小和成束错误的稳定性。它基于离散傅立叶变换的修改,等效于傅立叶系数的置换。因此,与传统的傅立叶变换一样,在发射信号中设置一组连续的等于零的系数使得能够在接收机处使用错误隐藏技术。但是,通过修改的变换,零不会在频谱中聚集在一起,因此可以缓解使用常规傅立叶变换时出现的不稳定性问题,并且可以使用更大的块大小。

著录项

  • 公开/公告号US6601206B1

    专利类型

  • 公开/公告日2003-07-29

    原文格式PDF

  • 申请/专利权人 AGERE SYSTEMS INC.;

    申请/专利号US19990447026

  • 发明设计人 FAROKH ALIM MARVASTI;

    申请日1999-11-22

  • 分类号H03M134/70;H03M130/10;G10L190/20;

  • 国家 US

  • 入库时间 2022-08-22 00:05:05

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