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1. 发明申请

WO2008003094A3 EFFICIENT REPRESENTATION OF SYMBOL-BASED TRANSFORMATIONS WITH APPLICATION TO ENCODING AND DECODING OF FORWARD ERROR CORRECTION CODES 审中-公开
公开(公告)号：WO2008003094A3
公开(公告)日：2008-01-03
申请号：PCT/US2007/072576
申请日：2007-06-29
申请人： DIGITAL FOUNTAIN, INC. , CHEN, Steve , WATSON, Mark , LUBY, Michael, G. , SEED, Bill , KUNZ, Thomas
发明人： CHEN, Steve , WATSON, Mark , LUBY, Michael, G. , SEED, Bill , KUNZ, Thomas
IPC分类号： G06F11/08
摘要： A sequence of symbol operations (a "schedule representation") within a data storage device, wherein the operations are those used to process encoding or decoding operations of a forward error correction code (an "FEC code") upon an arbitrary block of data of a given size (where size can be measured in numbers of symbols). The method is such that the schedule representation can be used to direct the processing of these operations upon a block of data in a way that is computationally efficient. Preferably, the same method can be applied to represent schedules derived from multiple different algorithms for the encoding or decoding of a code or for multiple different codes.

2. 发明申请

WO2007134196A2 CODE GENERATOR AND DECODER FOR COMMUNICATIONS SYSTEMS OPERATING USING HYBRID CODES TO ALLOW FOR MULTIPLE EFFICIENT USES OF THE COMMUNICATIONS SYSTEMS 审中-公开
标题翻译：用于通信系统的代码生成器和解码器使用混合代码进行通信系统的多种有效使用
公开(公告)号：WO2007134196A2
公开(公告)日：2007-11-22
申请号：PCT/US2007/068713
申请日：2007-05-10
申请人： DIGITAL FOUNTAIN, INC. , WATSON, Mark , LUBY, Michael, G.
发明人： WATSON, Mark , LUBY, Michael, G.
IPC分类号： A61F2/48
CPC分类号： H03M13/03 , H04L1/0052 , H04L1/0064
摘要： A method of encoding data for transmissions from a source to a destination over a communications channel is provided. The method operates on an ordered set of source symbols and may generate zero or more redundant symbols from the source symbols, wherein data is encoded in a first step according to a simple FEC code and in a second step, data is encoded according to a second FEC code, more complex than the first FEC code. The first FEC code and/or the second FEC code might comprise coding known in the art. These steps result in two groups of encoded data in such a way that a low complexity receiver may make use of one of the groups of encoded data while higher complexity receivers may make use of both groups of encoded data.
摘要翻译：提供了一种通过通信信道对从源到目的地的传输的数据进行编码的方法。该方法对有序的一组源符号进行操作，并且可以从源符号生成零个或多个冗余符号，其中根据简单FEC码在第一步骤中对数据进行编码，并且在第二步骤中，根据第二步对数据进行编码 FEC码，比第一个FEC码更复杂。第一FEC码和/或第二FEC码可以包括本领域已知的编码。这些步骤产生两组编码数据，使得低复杂度的接收机可以利用编码数据组之一，而较高复杂度的接收机可以利用两组编码数据。

3. 发明申请

WO2007098397A3 MULTIPLE-FIELD BASED CODE GENERATOR AND DECODER FOR COMMUNICATIONS SYSTEMS 审中-公开
公开(公告)号：WO2007098397A3
公开(公告)日：2007-08-30
申请号：PCT/US2007/062302
申请日：2007-02-16
申请人： DIGITAL FOUNTAIN, INC. , SHOKROLLAHI, M. Amin , LUBY, Michael, G. , WATSON, Mark , MINDER, Lorenz
发明人： SHOKROLLAHI, M. Amin , LUBY, Michael, G. , WATSON, Mark , MINDER, Lorenz
IPC分类号： H04B14/04
摘要： A method of encoding data for transmission from a source to a destination over a communications channel is provided. The method operates on an ordered set of input symbols and includes generating a plurality of redundant symbols from the input symbols based on linear constraints. The method also includes generating a plurality of output symbols from a combined set of symbols including the input symbols and the redundant symbols based on linear combinations, wherein at least one of the linear constraints or combinations is over a first finite field and at least one other of the linear constraints or combinations is over a different second finite field, and such that the ordered set of input symbols can be regenerated to a desired degree of accuracy from any predetermined number of the output symbols.

4. 发明申请

WO2007095551A3 FEC STREAMING WITH AGGREGATION OF CONCURRENT STREAMS FOR FEC COMPUTATION 审中-公开
公开(公告)号：WO2007095551A3
公开(公告)日：2007-08-23
申请号：PCT/US2007/062087
申请日：2007-02-13
申请人： DIGITAL FOUNTAIN, INC. , WATSON, Mark , LUBY, Michael, G.
发明人： WATSON, Mark , LUBY, Michael, G.
IPC分类号： H04L27/00
摘要： Transmitters and receivers deal with streams of data, wherein the receiver is expected to begin using received data before receiving all of the data. Concurrent streams are sent and FEC coding is used with the streams and done as an aggregate. The transmitter performs FEC operations over the plurality of streams, wherein source blocks from at least two streams logically associated into a jumbo source block and FEC processing is performed to generate one or more jumbo repair block from the jumbo source block. Each of the source blocks comprises one or more source symbols from their respective stream. The jumbo source symbols can be of constant size and are suitably aligned along size boundaries that make processing efficient. Each source symbol need not be the same size, and the number of source symbols from each stream in a jumbo source block need not be the same value across streams.

5. 发明申请

WO2007095550A2 STREAMING AND BUFFERING USING VARIABLE FEC OVERHEAD AND PROTECTION PERIODS 审中-公开
标题翻译：使用可变的FEC OVERHEAD和保护期的流水和缓冲
公开(公告)号：WO2007095550A2
公开(公告)日：2007-08-23
申请号：PCT/US2007/062086
申请日：2007-02-13
申请人： DIGITAL FOUNTAIN, INC. , WATSON, Mark , LUBY, Michael, G.
发明人： WATSON, Mark , LUBY, Michael, G.
CPC分类号： H04L1/1607 , H03M13/3761 , H04L1/0009 , H04L1/0041 , H04L1/0083
摘要： Data is streamed from a transmitter to a receiver, wherein streaming is transferring data with an assumption that the receiver will begin using the data before it is all transmitted and received and the streamed data includes forward error correction ("FEC") and the rates of data consumption can vary. The transmitter has an input rate and a transmit rate and the two rates can be different and can change. At the receiver, there is a reception rate (at which the receiver receives data) and a consumption rate (at which the receiver uses up data for its output). The transmitter transmits using a transmit rate higher than the consumption rate and the extra bandwidth is usable for FEC protection and buffering. In some embodiments, the excess rate varies over a transmission period.
摘要翻译：数据从发射机流传输到接收机，其中流传输数据的假设是接收机将在全部发送和接收数据之前开始使用数据，流传输的数据包括前向纠错（“FEC”）和数据消耗可能会有所不同。发射机具有输入速率和传输速率，两种速率可以不同，可以改变。在接收机处，存在接收速率（接收器接收数据的接收速率）和消耗速率（接收机用于其输出的数据）。发射机使用高于消耗速率的传输速率进行传输，并且额外的带宽可用于FEC保护和缓冲。在一些实施例中，超出速率在传输周期内变化。

6. 发明申请

WO2006135877A2 FORWARD ERROR-CORRECTING (FEC) CODING AND STREAMING 审中-公开
标题翻译：前向纠错（FEC）编码和流
公开(公告)号：WO2006135877A2
公开(公告)日：2006-12-21
申请号：PCT/US2006/022913
申请日：2006-06-12
申请人： DIGITAL FOUNTAIN, INC. , LUBY, Michael, G. , WATSON, Mark , SHOKROLLAHI, M. Amin
发明人： LUBY, Michael, G. , WATSON, Mark , SHOKROLLAHI, M. Amin
IPC分类号： H03M7/00
CPC分类号： H03M13/2906 , H03M13/1515 , H03M13/1575 , H03M13/3761 , H04L1/0042
摘要： In a data decoder for decoding data from received symbols received over a channel from an encoder, wherein the received data can include erasures and include source symbols and repair symbols and wherein the decoder uses in decoding a generator matrix, any square submatrix of which is invertible, such that the decoder can perform decoding operations concurrently with the arrival of the source symbols and repair symbols, a method of decoding comprising representing in decoder memory a system of equations derived, at least in part, from the generator matrix, substituting received source symbols into the system of equations as the source symbols are received before receiving all source symbols, identifying, using decoder logic, repair equations to be used for solving the system of equations as repair symbols arrive, calculating, using decoder logic, vector values for equations as source symbols arrive, and converting the system of equations into an upper triangular form as repair symbols arrive at the decoder. Novel methods can be used for interleaving and specifying encoding structure for a large class of FEC codes, scheduling the sending of packets and the like.
摘要翻译：在用于从通过编码器的信道上接收的接收到的符号中对数据进行解码的数据解码器中，其中所接收的数据可以包括擦除并且包括源符号和修复符号，并且其中解码器在对发生器矩阵进行解码时使用，任何正方形子矩阵是可逆的，使得解码器可以与源符号和修复符号的到达同时执行解码操作，解码方法包括在解码器存储器中表示至少部分地从发生器矩阵导出的等式的系统，代替接收的源符号在接收所有源符号之前接收到源符号的系统，识别使用解码器逻辑，用于解决修复符号到达的方程组的修正方程，使用解码器逻辑来计算方程式的向量值源符号到达，并将方程组转换为上三角形作为修复符号到达解码器。可以使用新的方法来交织和指定大类FEC码的编码结构，调度分组的发送等。

7. 发明申请

WO2009036378A1 GENERATING AND COMMUNICATING SOURCE IDENTIFICATION INFORMATION TO ENABLE RELIABLE COMMUNICATIONS 审中-公开
标题翻译：生成和传播资源识别信息以实现可靠的通信
公开(公告)号：WO2009036378A1
公开(公告)日：2009-03-19
申请号：PCT/US2008/076299
申请日：2008-09-12
申请人： DIGITAL FOUNTAIN, INC. , CHEN, Steve , LUBY, Michael, G. , PRASAD, Manu , SEED, William , STOCKHAMMER, Thomas
发明人： CHEN, Steve , LUBY, Michael, G. , PRASAD, Manu , SEED, William , STOCKHAMMER, Thomas
IPC分类号： G06F13/14
CPC分类号： H04L47/10 , H04L1/004 , H04L1/0072 , H04L1/1841 , H04L47/11 , H04L2001/0093
摘要： A method of generating Source Identification information from a source packet stream and reliably transmitting the Source Identification information from a source to a destination over a communications channel is provided. The method operates on a set of source packets, wherein Source Identification information for each source packet to be transmitted is derived and delivered with the Source Identification information of all or most other source packets of an associated source block. The method includes techniques to minimize the network bandwidth required to deliver Source Identification information and techniques to overcome network impairments. When combined with FEC techniques, retransmission techniques, or combinations of FEC techniques and retransmission techniques, the methods described herein allow receivers to recover lost source packets, while simultaneously ensuring that the original source packets are not modified and thereby ensuring backwards compatibility for legacy receivers.
摘要翻译：提供了从源分组流生成源标识信息并通过通信信道将源标识信息从源传送到目的地的方法。该方法对一组源数据包进行操作，其中将发送要发送的每个源数据包的源标识信息，并使用相关源块的所有或大多数其他源数据包的源标识信息进行传送。该方法包括最小化传递源标识信息和技术来克服网络损伤所需的网络带宽的技术。当结合FEC技术，重传技术或FEC技术和重传技术的组合时，本文描述的方法允许接收机恢复丢失的源分组，同时确保原始分组不被修改，从而确保遗留接收机的向后兼容性。

8. 发明申请

WO2009137705A2 FAST CHANNEL ZAPPING AND HIGH QUALITY STREAMING PROTECTION OVER A BROADCAST CHANNEL 审中-公开
标题翻译：广播频道快速通道切割和高品质流水线保护
公开(公告)号：WO2009137705A2
公开(公告)日：2009-11-12
申请号：PCT/US2009/043184
申请日：2009-05-07
申请人： DIGITAL FOUNTAIN, INC. , LUBY, Michael, G. , STOCKHAMMER, Thomas , SHOKROLLAHI, Amin
发明人： LUBY, Michael, G. , STOCKHAMMER, Thomas , SHOKROLLAHI, Amin
IPC分类号： H04N7/015 , H04N7/64
CPC分类号： H04N21/2381 , H04N21/2383 , H04N21/4382 , H04N21/4384
摘要： Signaling the sending of source blocks within multiple physical layer blocks is done for both streaming and object delivery applications, using minimal additional overhead, and in some cases no overhead, to signal interleaved source blocks within a physical layer block, signaling how symbols are related to the source blocks from which they are generated, and signaled sending and indications of prioritized data for source blocks. Organizing and sending streams over one more channels can be done to improve the quality of delivered streams, while minimizing or improving the needed amount of channel resources and receiver power resources needed.
摘要翻译：在多个物理层块中发送源块的发送是为流媒体和对象传递应用程序进行的，使用最少的额外开销，并且在某些情况下，没有开销用于对物理层块内的交织源块进行信号，表明符号如何与生成它们的源块，并发出信号发送和指示源块的优先数据。可以通过多个渠道组织和发送流，以提高传输流的质量，同时最小化或改善所需的信道资源和接收机功率资源的数量。

9. 发明申请

WO2006033652A1 SYSTEMS AND METHODS FOR BROADCASTING INFORMATION ADDITIVE CODES 审中-公开
标题翻译：用于广播信息添加剂代码的系统和方法
公开(公告)号：WO2006033652A1
公开(公告)日：2006-03-30
申请号：PCT/US2004/004683
申请日：2004-02-17
申请人： DIGITAL FOUNTAIN, INC. , FOISY, Christian , VO, Joseph, A. , SHOKROLLAHI, Amin, M. , LUBY, Michael, G.
发明人： FOISY, Christian , VO, Joseph, A. , SHOKROLLAHI, Amin, M. , LUBY, Michael, G.
IPC分类号： H03M13/11
CPC分类号： H03M13/11 , H03M13/373 , H03M13/3761 , H04H20/95
摘要： A broadcasting system for communicating data to multiple receivers using information additive code includes one or more information additive code transmitters (110) and one or more information additive code receivers (130). Each of the information additive code transmitters includes an encoder (312) configured to receive source data and to produce information additive code therefrom. Each of the information additive code receivers includes a decoder (732) configured to receive the information additive code and to reconstruct therefrom substantially a copy of the source data.
摘要翻译：使用信息附加码将数据传送到多个接收机的广播系统包括一个或多个信息附加码发送器（110）和一个或多个信息附加码接收器（130）。每个信息附加码发射器包括被配置为接收源数据并从其产生信息添加码的编码器（312）。每个信息附加码接收器包括被配置为接收信息附加码并从其重建源数据的副本的解码器（732）。

10. 发明申请

WO2004034589A3 SYSTEMATIC ENCODING AND DECODING OF CHAIN REACTION CODES 审中-公开
公开(公告)号：WO2004034589A3
公开(公告)日：2004-04-22
申请号：PCT/US2003/031108
申请日：2003-10-01
申请人： DIGITAL FOUNTAIN, INC. , SHOKROLLAHI, M., Amin , LUBY, Michael, G.
发明人： SHOKROLLAHI, M., Amin , LUBY, Michael, G.
IPC分类号： H03M13/11
摘要： A method of encoding data into a chain reaction code includes generating a set of input symbols from input data. Subsequently, one or more non-systematic output symbols is generated from the set of input symbols, each of the one or more nonsystematic output symbols being selected from an alphabet of non-systematic output symbols, and each non-systematic output symbol generated as a function of one or more of the input symbols. As a result of this encoding process, any subset of the set of input symbols is recoverable from (i) a predetermined number of non-systematic output symbols, or (ii) a combination of (a) input symbols which are not included in the subset of input symbols that are to be recovered, and (b) one or more of the non-systematic output symbols.

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