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1. 发明授权

EP1081869B1 Methods and apparatus for representation of branch metrics in a communication system decoder 有权
标题翻译：方法和实施例为分支度量的呈现在通信系统中解码器
公开(公告)号：EP1081869B1
公开(公告)日：2015-12-09
申请号：EP00307366.5
申请日：2000-08-29
申请人： Lucent Technologies Inc.
发明人： Lou, Hui-Ling , Urbanke, Rudiger L.
IPC分类号： H03M13/41
CPC分类号： H03M13/6325 , H03M13/256 , H03M13/3961 , H03M13/41 , H03M13/4107 , H03M13/6502

2. 发明公开

EP1030463A3 Tuning scheme for code division multiplex broadcasting system 有权
标题翻译：码分多路复用广播系统的调谐方案
公开(公告)号：EP1030463A3
公开(公告)日：2003-01-22
申请号：EP00300992.5
申请日：2000-02-09
申请人： LUCENT TECHNOLOGIES INC.
发明人： Lou, Hui-Ling , Sayeed, Zulfiquar , Weerackody, Vijitha
IPC分类号： H04B7/185 , H04H1/00
CPC分类号： H04H40/90 , H04B7/18523 , H04B7/216 , H04H20/22 , H04H20/57 , H04J13/004 , H04L1/0041 , H04L1/0045 , H04L1/0057 , H04L1/0071 , H04L1/02 , H04L2001/0096
摘要： A CDM satellite transmission system is disclosed that broadcasts programming content, such as audio and video information, using one or more geo-synchronous satellites based on Code Division Multiple Access (CDMA) technology. Forward error correction coding and interleaving are used prior to broadcasting the signals over the CDM channel to account for signal loss due to short-term fading. The CDM satellite transmission system provides a tuning channel corresponding to each program channel that reduces the delay when a mobile receiver is first tuned to a selected program channel. The tuning channel utilizes a shorter interleaver length, if any, than the corresponding primary program channel. The CDM satellite transmission system transmits a delayed version of a program signal with the on-time version of the audio output to accommodate uninterrupted reception in the event of such a blockage. In one implementation of the invention, the core layer, C(n), of the delayed version of the audio output of a scalable audio coding scheme is utilized as the tuning channel. The core layer, C 1 (n), and enhancement layers, E 1 (n), of the on-time signal and the enhancement layers, E 2 (n), of the delayed-time signal employ a representative block interleaver having a duration of four seconds. The tuning channel (C 2 (n), of the delayed-time signal) employs a representative block interleaver having a duration of 500 milliseconds.
摘要翻译：公开了一种CDM卫星传输系统，其使用基于码分多址（CDMA）技术的一个或多个地理同步卫星广播节目内容，例如音频和视频信息。在通过CDM信道广播信号之前使用前向纠错编码和交织来解决由于短期衰落造成的信号损失。 CDM卫星传输系统提供对应于每个节目频道的调谐频道，当移动接收机首次调谐到选择的节目频道时减少延迟。调谐信道利用比相应的主节目信道更短的交织器长度（如果有的话）。 CDM卫星传输系统发送节目信号的延迟版本与音频输出的准时版本，以适应在这种阻塞情况下的不间断接收。在本发明的一个实现中，可伸缩音频编码方案的音频输出的延迟版本的核心层C（n）被用作调谐信道。延迟时间信号的导通时间信号和增强层E2（n）的核心层C1（n）和增强层E1（n）使用具有四个持续时间的代表性块交织器秒。调谐信道（延迟时间信号的C2（n））使用具有500毫秒持续时间的代表性块交织器。

3. 发明公开

EP1143653A2 Multilevel coding with unequal error protection and time diversity for bandwidth efficient transmission 有权
标题翻译：不等错误保护和时间分集的高带宽的传输多层编码
公开(公告)号：EP1143653A2
公开(公告)日：2001-10-10
申请号：EP01302770.1
申请日：2001-03-26
申请人： LUCENT TECHNOLOGIES INC.
发明人： Chung, Sae-Young , Lou, Hui-Ling
IPC分类号： H04L1/00 , H04L27/34
CPC分类号： H04L1/0058 , H04L1/0041 , H04L1/0065 , H04L1/007
摘要： Improved techniques for multilevel coding of a stream of information bits in a communication system are disclosed. The stream of information bits is separated into portions, and each of the portions is associated with a different level of the multilevel coding. At least one code is applied to the portion of the information bits of each level in a designated subset of the full set of levels, such that the portions of the information bits for levels in the designated subset are coded while the portions of the information bits for levels not in the designated subset are uncoded. Both the coded portions of the information bits and the uncoded portions of the information bits are used to select modulation symbols for transmission in the system. Advantageously, the invention provides improved coding gain relative to conventional techniques, and can be configured to provide unequal error protection as well as time diversity for transmissions in the system.
摘要翻译：改进了对在通信系统中的信息位流的多级编码技术是游离缺失盘。信息比特的流被分离成多个部分，并且每个部分都与不同的电平的多级编码相关联。至少一个代码被施加到在全套电平中的一个指定的子集中的每个级的信息位的部分，检查没有信息比特的用于指定子集电平的部分进行编码，而信息比特的部在指定的子集不是水平未编码。两个信息比特和信息比特的未编码部分的编码部分进行用于选择系统中的传输的调制符号。有利的是，本发明提供了改进的编码相对于常规技术的增益，并且可以被配置为提供不等差错保护以及在系统中的传输时间分集。

4. 发明公开

EP1081869A3 Methods and apparatus for representation of branch metrics in a communication system decoder 有权
标题翻译：方法和实施例为分支度量的呈现在通信系统中解码器
公开(公告)号：EP1081869A3
公开(公告)日：2003-11-19
申请号：EP00307366.5
申请日：2000-08-29
申请人： LUCENT TECHNOLOGIES INC.
发明人： Lou, Hui-Ling , Urbanke, Rudiger L.
IPC分类号： H03M13/41
CPC分类号： H03M13/6325 , H03M13/256 , H03M13/3961 , H03M13/41 , H03M13/4107 , H03M13/6502
摘要： In a communication system decoder (10) branch metrics are represented using linear distance. An illustrative embodiment for decoding a sequence of received symbols of a QPSK or QAM constellation includes a branch metric calculation unit (12) an add-compare-select unit (14) and a traceback unit (16). The branch metric unit computes branch metrics associated with transitions between states of a multi-stage trellis representation of a state machine. In accordance with the invention, each of the branch metrics correspond to a linear distance between a given one of the received symbols and its nearest codeword in a given stage of the trellis. The add-compare-select unit utilizes the branch metrics of a current stage, along with a previously-generated path metric, for comparison purposes in determining a survivor path and corresponding updated path metric for a current stage of the multi-stage trellis. The traceback unit utilizes the updated path metric to generate a corresponding decoded output. Advantageously, the add-compare-select unit of the decoder is configured such that it achieves a level of performance using the linear distance branch metrics which is equivalent to that achieved using squared distance branch metrics, while also substantially reducing the decoder complexity through the elimination of multiplication operations.

5. 发明公开

EP1102407A3 Method and apparatus for providing channel error protection for a source coded bit stream 有权
标题翻译：用于源的信道的差错保护编码的比特流的方法和装置
公开(公告)号：EP1102407A3
公开(公告)日：2003-03-12
申请号：EP00309844.9
申请日：2000-11-06
申请人： LUCENT TECHNOLOGIES INC.
发明人： Anand, Raghavan , Lou, Hui-Ling , Podilchuk, Christine Irene
IPC分类号： H03M13/35 , H03M13/00
CPC分类号： H03M13/6362 , H03M13/23 , H03M13/356
摘要： Unequal channel error protection is provided for a bit stream, e.g., a progressive source coded bit stream, by puncturing of a channel code. The channel code has a specified rate associated with a corresponding level of error protection, and is used to code a first portion of the bit stream. The channel code is subsequently punctured for at least a second portion of the bit stream so as to provide a rate higher than that of the designated rate. Commencement of the puncturing is deliberately delayed by an amount determined based at least in part on a memory of the channel code. Advantageously, the delay prevents propagation of errors in a channel decoder used to decode the channel coded bit stream. The progressive bit stream may be a progressive source coded video or audio bit stream, any other type of progressive information bit stream, or a partitioned source coded bit stream.

6. 发明公开

EP1041766A3 Apparatus for communicating multiple digital representations of a signal 审中-公开
标题翻译：安排用于传输信号的多个数字表示
公开(公告)号：EP1041766A3
公开(公告)日：2002-09-11
申请号：EP00302319.9
申请日：2000-03-22
申请人： LUCENT TECHNOLOGIES INC.
发明人： Lou, Hui-Ling , Sinha, Deepen , Sundberg, Carl-Erik Wilhelm
IPC分类号： H04L5/02 , H04H1/00 , H04L5/06 , H04L1/00
CPC分类号： H04H20/30 , H04H60/07 , H04H2201/186
摘要： In a communications system implementing, e.g., an in-band on channel AM (IBOC-AM) (also known as "hybrid IBOC-AM") scheme, multiple bit streams are used to represent an audio signal to be transmitted over one or more frequency bands including, e.g., parts of an AM frequency band for radio broadcast. These bit streams contain various and/or equivalent amounts of audio information. In an illustrative embodiment, at least one of the bit streams is a core bit stream containing core audio information. The remaining bit streams are enhancement bit streams containing enhancement audio information. The core bit stream is necessary for recovering the audio signal with minimal acceptable quality. Such quality is enhanced when the core bit stream, together with one or more of the enhancement bit streams, is used to recover the audio signal. In accordance with the invention, the AM frequency band is divided into subbands. Each of the core and enhancement bit streams is assigned to a respective one of the subbands for transmission. The assignment is conducive to an effective treatment of interference affecting the IBOC-AM system. Other embodiments may include, e.g., communications of the multiple bit streams in accordance with the invention in an IBOC-FM system, a satellite broadcasting system, etc.

7. 发明授权

EP1043877B1 Method and apparatus for reducing start-up delay in data packet-based network streaming applications 有权
标题翻译：用于减少启动延迟的方法和装置的数据包为基础的网络流量的应用
公开(公告)号：EP1043877B1
公开(公告)日：2002-08-14
申请号：EP00302558.2
申请日：2000-03-28
申请人： LUCENT TECHNOLOGIES INC.
发明人： Lou, Hui-Ling , Schuller, Gerald Dietrich Thomas , Weerackody, Vijitha
IPC分类号： H04L29/06 , H04N7/26 , H04N7/24
CPC分类号： H04L65/607 , H04L65/80 , H04N19/37 , H04N21/234327 , H04N21/23439 , H04N21/4384

8. 发明公开

EP1081908A2 Signal processing without muliplication in receivers for digital signals 有权
标题翻译： Signalverarbeitung ohne Multiplizierung inEmpfängernfürdigitale Signale
公开(公告)号：EP1081908A2
公开(公告)日：2001-03-07
申请号：EP00307409.3
申请日：2000-08-29
申请人： LUCENT TECHNOLOGIES INC.
发明人： Lou, Hui-Ling , Rupp, Markus
IPC分类号： H04L27/38
CPC分类号： H04L27/38
摘要： Signal processing operations are performed in a digital communication system receiver on a sequence of received symbols, each representing a number of information bits. The symbols correspond to points in a given modulation constellation generated by applying a predetermined rotation, e.g., a 45° rotation, to an otherwise conventional modulation constellation, e.g., a QPSK constellation, a 16-QAM constellation, etc. The use of the rotated constellation allows certain signal processing operations, such as filtering, Least-Mean-Squares (LMS) estimation, and Maximum-Likelihood (ML) sequence detection via the Viterbi algorithm, to be performed without the need for multipliers. By eliminating or substantially reducing the number of required multiplication operations, the invention significantly reduces the complexity and delay associated with the corresponding signal processing circuitry. Advantageously, this reduction in complexity and delay is accomplished without the use of any approximation or other reduction in precision.
摘要翻译：信号处理操作在数字通信系统接收机中在接收符号序列上执行，每一个表示多个信息位。这些符号对应于通过将预定旋转（例如45度旋转）应用于另外常规的调制星座（例如QPSK星座，16-QAM星座等）而产生的给定调制星座中的点。使用旋转星座允许在不需要乘法器的情况下执行诸如滤波，最小均方（LMS）估计和维特比算法的最大似然（ML）序列检测之类的某些信号处理操作。通过消除或显着减少所需的乘法运算的数量，本发明显着地降低了与对应的信号处理电路相关联的复杂性和延迟。有利地，在不使用任何近似或其他精度降低的情况下实现复杂性和延迟的这种降低。

9. 发明授权

EP1081908B1 Signal processing without multiplication in receivers for digital signals 有权
标题翻译：不用乘法在接收机的数字信号进行信号处理
公开(公告)号：EP1081908B1
公开(公告)日：2014-02-19
申请号：EP00307409.3
申请日：2000-08-29
申请人： Lucent Technologies Inc.
发明人： Lou, Hui-Ling , Rupp, Markus
IPC分类号： H04L27/38
CPC分类号： H04L27/38

10. 发明授权

EP1143653B1 Multilevel coding with unequal error protection and time diversity for bandwidth efficient transmission 有权
标题翻译：不等错误保护和时间分集的高带宽的传输多层编码
公开(公告)号：EP1143653B1
公开(公告)日：2010-07-28
申请号：EP01302770.1
申请日：2001-03-26
申请人： LUCENT TECHNOLOGIES INC.
发明人： Chung, Sae-Young , Lou, Hui-Ling
IPC分类号： H04L1/00 , H04L27/34
CPC分类号： H04L1/0058 , H04L1/0041 , H04L1/0065 , H04L1/007

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