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    • 12. 发明授权
    • Error concealment or correction of speech, image and video signals
    • 错误隐藏或纠正语音,图像和视频信号
    • US06601206B1
    • 2003-07-29
    • US09447026
    • 1999-11-22
    • Farokh Alim Marvasti
    • Farokh Alim Marvasti
    • H03M1347
    • H03M13/6312H03M13/6536
    • 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.
    • 一种错误隐藏或校正的方法,适用于诸如语音,图像和视频信号之类的信号,特别是对于通过无线和ATM信道传输的信号。 该方法提高了大块大小和聚束误差的稳定性。 它是基于等价于傅里叶系数的置换的离散傅立叶变换的修改。 因此,与传统的傅里叶变换一样,在发送信号中设置等于零的连续的系数集合使得能够在接收机处使用错误隐藏技术。 然而,通过修改的变换,零谱不在光谱中聚束在一起,因此使用常规傅立叶变换时出现的不稳定性问题被减弱,并且可以使用更大的块大小。
    • 16. 发明授权
    • Interleaving method
    • US07039069B2
    • 2006-05-02
    • US10075599
    • 2002-02-15
    • Hideyuki Hayashi
    • Hideyuki Hayashi
    • H04J3/24
    • H03M13/6536H03M13/2789
    • There is provided an interleaving method capable of reducing burst errors. Transmitted data includes a plurality of radio blocks. It is assumed that each radio block includes four burst signals and each burst signal includes data signals of 448 bits, flag signals, and a synchronizing signal. On the basis of the occurrence frequency of burst errors, the communication buffer capacity, the transmission delay time allowed between the transmission and reception, the kind of communication data, and radio wave propagation characteristics, the transmission side selects as the burst length of interleaving, a value from among values 4, 8, 16, 28 and 32 that are multiples of the number 4 of burst signals included in each of the radio blocks and that are divisors of the total number 448 of bits of data signals included in each of radio blocks. The transmission side transmits the selected burst length to the reception side, and conducts interleaving on the basis of the selected burst length. The reception side conducts deinterleaving on the basis of the burst length transmitted from the transmission side.
    • 18. 发明公开
    • Interleaving method
    • 交错
    • EP1235354A3
    • 2004-09-22
    • EP02003198.5
    • 2002-02-18
    • NEC CORPORATION
    • Hayashi, Hideyuki
    • H03M13/27
    • H03M13/6536H03M13/2789
    • There is provided an interleaving method capable of reducing burst errors. Transmitted data includes a plurality of radio blocks. It is assumed that each radio block includes four burst signals and each burst signal includes data signals of 448 bits, flag signals, and a synchronizing signal. On the basis of the occurrence frequency of burst errors, the communication buffer capacity, the transmission delay time allowed between the transmission and reception, the kind of communication data, and radio wave propagation characteristics, the transmission side selects as the burst length of interleaving, a value from among values 4, 8, 16, 28 and 32 that are multiples of the number 4 of burst signals included in each of the radio blocks and that are divisors of the total number 448 of bits of data signals included in each of radio blocks. The transmission side transmits the selected burst length to the reception side, and conducts interleaving on the basis of the selected burst length. The reception side conducts deinterleaving on the basis of the burst length transmitted from the transmission side (Fig. 4).
    • 19. 发明公开
    • Interleaving method
    • Verschachtelungsverfahren
    • EP1235354A2
    • 2002-08-28
    • EP02003198.5
    • 2002-02-18
    • NEC CORPORATION
    • Hayashi, Hideyuki
    • H03M13/27
    • H03M13/6536H03M13/2789
    • There is provided an interleaving method capable of reducing burst errors. Transmitted data includes a plurality of radio blocks. It is assumed that each radio block includes four burst signals and each burst signal includes data signals of 448 bits, flag signals, and a synchronizing signal. On the basis of the occurrence frequency of burst errors, the communication buffer capacity, the transmission delay time allowed between the transmission and reception, the kind of communication data, and radio wave propagation characteristics, the transmission side selects as the burst length of interleaving, a value from among values 4, 8, 16, 28 and 32 that are multiples of the number 4 of burst signals included in each of the radio blocks and that are divisors of the total number 448 of bits of data signals included in each of radio blocks. The transmission side transmits the selected burst length to the reception side, and conducts interleaving on the basis of the selected burst length. The reception side conducts deinterleaving on the basis of the burst length transmitted from the transmission side (Fig. 4).
    • 提供了能够减少突发错误的交织方法。 发送数据包括多个无线电块。 假设每个无线电块包括四个突发信号,并且每个突发信号包括448位的数据信号,标志信号和同步信号。 基于突发错误的发生频率,通信缓冲器容量,发送和接收之间允许的传输延迟时间,通信数据的种类和无线电波传播特性,发送侧选择交织的突发长度, 在值4,8,16,28和32中的值是包括在每个无线电块中的突发信号的数量4的倍数,并且是包括在每个无线电中的数据信号的总数448的除数 块。 发送侧将所选择的突发长度发送到接收侧,并且基于所选择的突发长度进行交织。 接收侧基于从发送侧发送的突发长度进行去交织(图4)。