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公开(公告)号：US07953193B2
公开(公告)日：2011-05-31
申请号：US10386795
申请日：2003-03-12
CPC分类号： H04L25/0218 , H04L25/03057 , H04L25/03987 , H04L2025/0349 , H04L2025/03617 , H04L2025/0377
摘要： Sparse channel equalization may be achieved by receiving a signal via a multi-path communication channel. The equalization then continues by extracting sparse information regarding the multiple path communication channel from the signal. Such sparse information generally indicates the position of the signals received via each of the multiple paths. The equalization then continues by estimating a channel response of the multiple path communication channel based on the sparse information. The equalization then continues by generating equalization taps (or coefficients) based on the channel response. The equalization then continues by equalizing the signal based on the equalization taps.
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2.发明授权Determine coefficients of a decision feedback equalizer from a sparse channel estimate 有权从稀疏信道估计确定判决反馈均衡器的系数公开(公告)号：US07230983B2
公开(公告)日：2007-06-12
申请号：US10387251
申请日：2003-03-12
CPC分类号： H04L25/03057 , H04L25/0202
摘要： Determination of equalizer coefficients from a sparse channel estimate begins by determining location of significant taps based on the sparse channel estimate of a multiple path communication channel. The sparse channel estimate indicates the positioning of signals received via the various multiple paths of the channel. The method then continues by determining feed-forward equalization coefficients based on the location of the significant taps. The method then continues by determining feedback equalization coefficients based on the feed-forward equalization coefficients and the sparse channel estimate.
摘要翻译： 基于稀疏信道估计的均衡器系数的确定开始于基于多路径通信信道的稀疏信道估计的重要抽头的位置。 稀疏信道估计表示经由信道的各种多路径接收的信号的定位。 然后，该方法通过基于显着抽头的位置确定前馈均衡系数来继续。 该方法然后通过基于前馈均衡系数和稀疏信道估计来确定反馈均衡系数来继续。
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3.发明授权Datastream packet alignment indicator in a system for assembling transport data packets 失效用于组装传输数据包的系统中的数据流分组对齐指示符
公开(公告)号：US5767912A
公开(公告)日：1998-06-16
申请号：US648148
申请日：1996-05-23
IPC分类号： H04N7/52 , H04N21/236 , H04N21/242 , H04N7/12 , H04N7/04
CPC分类号： H04N21/242 , H04N21/23611 , H04N7/52
摘要： In a digital television signal processing system, a special codeword, a Packet Alignment Flag (PAF), is inserted into an MPEG codeword bitstream to signify the presence of a Group of Pictures (GOP). The PAF immediately precedes a Picture Start codeword for an "I" frame, which initiates a GOP. A data packet under construction when a PAF appears is terminated since a GOP is intended to begin at a packet boundary. Such termination may result in an abbreviated packet of less than a prescribed number of codewords needed to complete a data packet. The last word of each packet is designated as such to facilitate the subsequent combining of data packets with respective headers. An incomplete data packet is filled with null (zeroed bits) words to make up a complete data packet with a prescribed number of words.
摘要翻译： PCT No.PCT / US93 / 11640 Sec。 371日期：1996年5月23日 102（e）日期1996年5月23日PCT提交1993年11月30日PCT公布。 出版物WO95 / 15652 日期：1995年6月8日在数字电视信号处理系统中，将特殊码字（分组对准标志（PAF））插入到MPEG码字比特流中，以表示存在一组图像（GOP）。 PAF紧接在“I”帧的图像起始码字之前，其启动GOP。 当PAF出现时正在构建的数据分组被终止，因为GOP旨在从分组边界开始。 这种终止可能导致小于完成数据分组所需的码字的规定数量的缩写分组。 每个分组的最后一个字被指定为便于数据分组与相应报头的后续组合。 一个不完整的数据包用空（零位）字填充以构成具有规定数量字的完整数据包。
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公开(公告)号：US08014449B2
公开(公告)日：2011-09-06
申请号：US12825893
申请日：2010-06-29
IPC分类号： H04N7/12
CPC分类号： H04N21/2383 , H04N21/4382
摘要： Communications signal transcoder. A solution is provided to transcode a signal from a first signal type to a second signal type to ensure proper interfacing between devices that may operate using different signal types. For example, within a communication system, a first signal type (having a first modulation type, e.g., 8 PSK) may be received. The transcoder then ensures that this signal, after it has undergone any initial processing (such as tuning, down-converting, decoding, and so on), is encoded into a second signal type (having a second modulation type, e.g., QPSK) such that it can interface properly with a device for which the received signal is intended. This transcoder functionality may be implemented within discrete components, or it may alternatively be integrated within a functional block of an integrated circuit. This functionality may be implemented in a variety of communication systems including satellite, cable television, Internet, and others.
摘要翻译： 通信信号转码器。 提供了将信号从第一信号类型转换为第二信号类型的解决方案，以确保可以使用不同信号类型操作的设备之间的适当接口。 例如，在通信系统中，可以接收第一信号类型（具有第一调制类型，例如8PSK）。 代码转换器然后确保该信号经过任何初始处理（诸如调谐，下变换，解码等等）之后被编码为第二信号类型（具有第二调制类型，例如QPSK），例如 它可以与接收到的信号的设备正确连接。 该代码转换器功能可以在分立组件内实现，或者可选地集成在集成电路的功能块内。 该功能可以在包括卫星，有线电视，因特网等的各种通信系统中实现。
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公开(公告)号：US20100267330A1
公开(公告)日：2010-10-21
申请号：US12825893
申请日：2010-06-29
IPC分类号： H04H20/74
CPC分类号： H04N21/2383 , H04N21/4382
摘要： Communications signal transcoder. A solution is provided to transcode a signal from a first signal type to a second signal type to ensure proper interfacing between devices that may operate using different signal types. For example, within a communication system, a first signal type (having a first modulation type, e.g., 8 PSK) may be received. The transcoder then ensures that this signal, after it has undergone any initial processing (such as tuning, down-converting, decoding, and so on), is encoded into a second signal type (having a second modulation type, e.g., QPSK) such that it can interface properly with a device for which the received signal is intended. This transcoder functionality may be implemented within discrete components, or it may alternatively be integrated within a functional block of an integrated circuit. This functionality may be implemented in a variety of communication systems including satellite, cable television, Internet, and others.
摘要翻译： 通信信号转码器。 提供了将信号从第一信号类型转换为第二信号类型的解决方案，以确保可以使用不同信号类型操作的设备之间的适当接口。 例如，在通信系统中，可以接收第一信号类型（具有第一调制类型，例如8PSK）。 代码转换器然后确保该信号经过任何初始处理（诸如调谐，下变换，解码等等）之后被编码为第二信号类型（具有第二调制类型，例如QPSK），例如 它可以与接收到的信号的设备正确连接。 该代码转换器功能可以在分立组件内实现，或者可选地集成在集成电路的功能块内。 该功能可以在包括卫星，有线电视，因特网等的各种通信系统中实现。
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公开(公告)号：US07751477B2
公开(公告)日：2010-07-06
申请号：US10736434
申请日：2003-12-15
CPC分类号： H04N21/2383 , H04N21/4382
摘要： Communications signal transcoder. A solution is provided to transcode a signal from a first signal type to a second signal type to ensure proper interfacing between devices that may operate using different signal types. For example, within a communication system, a first signal type (having a first modulation type, e.g., 8 PSK) may be received. The transcoder then ensures that this signal, after it has undergone any initial processing (such as tuning, down-converting, decoding, and so on), is encoded into a second signal type (having a second modulation type, e.g., QPSK) such that it can interface properly with a device for which the received signal is intended. This transcoder functionality may be implemented within discrete components, or it may alternatively be integrated within a functional block of an integrated circuit. This functionality may be implemented in a variety of communication systems including satellite, cable television, Internet, and others.
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7.发明授权
公开(公告)号：US5796743A
公开(公告)日：1998-08-18
申请号：US649634
申请日：1996-05-23
IPC分类号： H04N11/04 , H04L12/951 , H04N7/08 , H04N7/081 , H04N7/12 , H04N7/24 , H04N7/60 , H04N19/00 , H04N21/236 , H04N21/434
CPC分类号： H04N21/434 , H04N21/236
摘要： In a digital television signal processing system, a special codeword, a Packet Alignment Flag (PAF), is inserted into an MPEG codeword bitstream to signify the presence of a Group of Pictures (GOP). The PAF immediately precedes a Picture Start codeword for an "I" frame, which initiates a GOP. A data packet under construction when a PAF appears is terminated since a GOP is intended to begin at a packet boundary. Such termination may result in an abbreviated packet of MPEG codewords less than a prescribed number of bits needed to complete a data packet. The last word of each packet is designated as such to facilitate the subsequent combining of data packets with respective headers. An incomplete data packet is filled with null (zeroed bits) words to make up a complete data packet with a prescribed number of bits.
摘要翻译： PCT No.PCT / US93 / 11613 Sec。 371日期：1996年5月23日 102（e）日期1996年5月23日PCT提交1993年11月30日PCT公布。 公开号WO95 / 15651 日期：1995年6月8日在数字电视信号处理系统中，将特殊码字（分组对准标志（PAF））插入到MPEG码字比特流中，以表示存在一组图像（GOP）。 PAF紧接在“I”帧的图像起始码字之前，其启动GOP。 当PAF出现时正在构建的数据分组被终止，因为GOP旨在从分组边界开始。 这种终止可能导致MPEG码字的缩写分组小于完成数据分组所需的规定位数。 每个分组的最后一个字被指定为便于数据分组与相应报头的后续组合。 不完整的数据包用空（零位）字填充以构成具有规定位数的完整数据分组。
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