公开(公告)号：US08351485B2

公开(公告)日：2013-01-08

申请号：US12680394

申请日：2008-09-27

申请人： Hang Li

发明人： Hang Li

IPC分类号： H04B1/00

CPC分类号： H04L5/0016 ,  H04L27/2634 ,  H04L27/2647

摘要： The present invention provides a time-frequency code spreading method in an OFDMA system. The method includes: converting a transmission message into one or more modulating signal vectors, and each bit of the transmission message is spread onto all vector elements of a modulating signal vector; mapping one or more modulating signal vectors to a set of time-frequency grids, wherein in an OFDMA time-frequency plane, two time-frequency grids to which any two vector elements in each modulating signal vector are mapped do not have the same frequency location or time location. In addition, the present invention also provides a time-frequency code spreading apparatus in an OFDMA system.

摘要翻译： 本发明提供了一种OFDMA系统中的时频码扩展方法。 该方法包括：将传输消息转换成一个或多个调制信号向量，并将传输消息的每个比特扩展到调制信号向量的所有向量元素上; 将一个或多个调制信号向量映射到一组时频网格，其中在OFDMA时频平面中，映射每个调制信号向量中的任何两个矢量元素的两个时间频率网格不具有相同的频率位置 或时间位置。 此外，本发明还提供了OFDMA系统中的时间 - 频率代码扩展装置。

公开(公告)号：US08331269B2

公开(公告)日：2012-12-11

申请号：US12682518

申请日：2008-10-09

申请人： Hang Li ,  Guanghan Xu ,  Yongquan Qiang ,  Hui Zhou ,  Qiang Ma

发明人： Hang Li ,  Guanghan Xu ,  Yongquan Qiang ,  Hui Zhou ,  Qiang Ma

IPC分类号： H04L12/66 ,  H04W4/00 ,  G06F15/173

CPC分类号： H04L1/1835 ,  H04L1/0001 ,  H04L1/1607 ,  H04L45/00 ,  H04L47/26 ,  H04L47/34 ,  H04L47/70 ,  H04L47/76

摘要： Embodiments of the present invention provide a method and device for transmitting voice in a wireless system. The method includes: identifying, by a transmitter, each original voice encoding packet needed to be sent out with a number indicating playback order, and performing channel encoding on each identified original voice encoding packet to construct a voice session packet; establishing a voice session or voice data mixed session between the transmitter and a receiver; allocating a channel dynamically for the voice session or the voice data mixed session; sending, by the transmitter, newly-arrived voice session packets, delayed voice session packets, voice session packets needed to be re-transmitted, data session packets and control command packets according to pre-configured priority; receiving and detecting, by the receiver, the voice session packets, sending an NACK packet comprising number of a lost voice session packet to the transmitter to inform the transmitter to re-transmit the voice session packet, if it is confirmed that the voice session packet is lost; and putting voice session packets properly received into a jitter buffer controller at the receiver if the receiver is a terminal. In embodiments of the present invention, spectral efficiency and reliability of real-time voice services in a wireless multi-service transmission system may be improved while satisfying the Quality of Service (QoS) requirements of real-time services, such as voice service.

摘要翻译： 本发明的实施例提供了一种用于在无线系统中发送语音的方法和装置。 该方法包括：通过发送器识别需要发出的每个原始语音编码分组，其中指示播放顺序的数字，并且对每个识别的原始语音编码分组执行信道编码以构建语音会话分组; 在发射机和接收机之间建立语音会话或语音数据混合会话; 为语音会话或语音数据混合会话动态分配信道; 根据预配置的优先级，由发射机发送新到达的语音会话分组，延迟的语音会话分组，需要重发的语音会话分组，数据会话分组和控制命令分组; 由所述接收机接收和检测所述语音会话分组，向所述发射机发送包括丢失语音会话分组数量的NACK分组，以通知所述发射机重新发送所述语音会话分组，如果确认所述语音会话分组 失去了 并且如果接收器是终端，则将语音会话分组正确地接收到接收机的抖动缓冲器控制器中。 在本发明的实施例中，可以在满足诸如语音服务等实时业务的服务质量（QoS）要求的同时，提高无线多业务传输系统中的实时语音业务的频谱效率和可靠性。

公开(公告)号：US08289914B2

公开(公告)日：2012-10-16

申请号：US12680667

申请日：2008-09-27

申请人： Hang Li ,  Guanghan Xu

发明人： Hang Li ,  Guanghan Xu

IPC分类号： H04W4/00

CPC分类号： H04L5/0007 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/0087 ,  H04L5/0096 ,  H04L25/03343 ,  H04L2025/03802

摘要： Embodiments of the present invention provide a signal transmission method and apparatus used in an Orthogonal Frequency Division Multiple Access (OFDMA) wireless communication system, to enhance stability of signal transmission and resist time-frequency dispersion. The signal transmission method used in the OFDMA wireless communication system provided by an embodiment of the invention includes: converting an L×1 symbol vector into an N×1 modulating signal vector according to a loading factor fed back by a receiving party, in which value of N is known, both L and N are natural numbers larger than one, N is larger than or equal to L, the loading factor is a ratio of L and N; mapping the N×1 modulating signal vector into N time-frequency grids; and converting the N time-frequency grids into a signal waveform and sending the signal waveform to the receiving party.

摘要翻译： 本发明的实施例提供了一种在正交频分多址（OFDMA）无线通信系统中使用的信号传输方法和装置，以增强信号传输的稳定性并抵抗时间 - 频率分散。 在本发明实施例提供的OFDMA无线通信系统中使用的信号传输方法包括：根据接收方反馈的负载因子将L×1符号向量转换为N×1个调制信号向量，其中值 N是已知的，L和N都是大于1的自然数，N大于或等于L，负载系数是L和N的比率; 将N×1调制信号矢量映射为N个时频网格; 并将N个时频网格转换成信号波形并将信号波形发送到接收方。

公开(公告)号：US08244737B2

公开(公告)日：2012-08-14

申请号：US11764554

申请日：2007-06-18

申请人： Tie-Yan Liu ,  Hang Li ,  Bin Gao ,  Lei Yang ,  Lei Qi

发明人： Tie-Yan Liu ,  Hang Li ,  Bin Gao ,  Lei Yang ,  Lei Qi

IPC分类号： G06F17/30

CPC分类号： G06F17/30864

摘要： Ranking documents based on a series of web graphs collected over time is provided. A ranking system provides multiple transition probability distributions representing different snapshots or times. Each transition probability distribution represents a probability of transitioning from one document to another document within a collection of documents using a link of the document. The ranking system determines a stationary probability distribution for each snapshot based on the transition probability distributions for that snapshot and the stationary probability distribution of the previous snapshot. The stationary probability distributions represent a ranking of the documents over time.

摘要翻译： 提供了基于随时间收集的一系列网络图表排列文档。 排名系统提供代表不同快照或时间的多个转移概率分布。 每个转移概率分布表示使用文档的链接在一个文档集合内从一个文档转换到另一个文档的概率。 排名系统基于该快照的转移概率分布和先前快照的固定概率分布确定每个快照的固定概率分布。 固定概率分布代表文档随时间的排列。

公开(公告)号：US08219549B2

公开(公告)日：2012-07-10

申请号：US12027259

申请日：2008-02-06

申请人： Bin Gao ,  Tie-Yan Liu ,  Hang Li ,  Congkai Sun

发明人： Bin Gao ,  Tie-Yan Liu ,  Hang Li ,  Congkai Sun

IPC分类号： G06F7/00

CPC分类号： G06F17/30864

摘要： An anti-spam technique for protecting search engine ranking is based on mining search engine optimization (SEO) forums. The anti-spam technique collects webpages such as SEO forum posts from a list of suspect spam websites, and extracts suspicious link exchange URLs and corresponding link formation from the collected webpages. A search engine ranking penalty is then applied to the suspicious link exchange URLs. The penalty is at least partially determined by the link information associated with the respective suspicious link exchange URL. To detect more suspicious link exchange URLs, the technique may propagate one or more levels from a seed set of suspicious link exchange URLs generated by mining SEO forums.

摘要翻译： 用于保护搜索引擎排名的反垃圾邮件技术是基于挖掘搜索引擎优化（SEO）论坛。 反垃圾邮件技术从可疑垃圾邮件网站列表中收集诸如SEO论坛帖子的网页，并从收集的网页中提取可疑链接交换网址和相应的链接形成。 然后将搜索引擎排名惩罚应用于可疑链接交换URL。 惩罚至少部分地由与相应的可疑链接交换URL相关联的链接信息确定。 为了检测更多可疑的链接交换URL，该技术可以从采矿SEO论坛产生的可疑链接交换URL的种子集传播一个或多个级别。

公开(公告)号：US20120030200A1

公开(公告)日：2012-02-02

申请号：US13271638

申请日：2011-10-12

申请人： Qing Yu ,  Jun Xu ,  Hang Li

发明人： Qing Yu ,  Jun Xu ,  Hang Li

IPC分类号： G06F17/30

CPC分类号： G06F17/30864

摘要： Described is a technology by which topics corresponding to web pages are used in relevance ranking of those pages. Topics are extracted from each web page of a set of web pages that are found via a query. For example, text such as nouns may be extracted from the title, anchor texts and URL of a page, and used as the topics. The extracted topics from a page are used to compute a relevance score for that page based on an evaluation of that page's topics against the query. The pages are then ranked relative to one another based at least in part on the relevance score computed for each page, such as by determining a matching level for each page, ranking pages by each level, and ranking pages within each level. Also described is training a model to perform the relevance scoring and/or ranking.

摘要翻译： 描述了一种技术，通过该技术将与网页相对应的主题用于那些页面的相关性排名。 从通过查询找到的一组网页的每个网页中提取主题。 例如，可以从标题，锚文本和页面的URL中提取诸如名词的文本，并且用作主题。 从页面提取的主题用于根据对该页面的主题对查询的评估来计算该页面的相关性分数。 这些页面至少部分地基于针对每个页面计算的相关性分数相对于彼此进行排名，例如通过确定每个页面的匹配级别，按各级别排序页面以及在每个级别内对页面进行排序。 还描述了训练模型以执行相关性评分和/或排名。

公开(公告)号：US08001290B2

公开(公告)日：2011-08-16

申请号：US12205386

申请日：2008-09-05

申请人： Richard D. Beckert ,  Mark M. Moeller ,  Hang Li

发明人： Richard D. Beckert ,  Mark M. Moeller ,  Hang Li

IPC分类号： G06F3/00 ,  G06F13/00

CPC分类号： B60R16/0315 ,  B60R2016/0322

摘要： A vehicle computer system has an audio entertainment system implemented in a logic unit and audio digital signal processor (DSP) independent from the host CPU. The audio entertainment system employs a set of ping/pong buffers and direct memory access (DMA) circuits to transfer data between different audio devices. Audio data is exchanged using a mapping overlay technique, in which the DMA circuits for two audio devices read and write to the same memory buffer. The computer system provides an audio manager API (application program interface) to enable applications running on the computer to control the various audio sources without knowing the hardware and implementation details of the underlying sound system. Different audio devices and their drivers control different functionality of the audio system, such as equalization, volume controls and surround sound decoding. The audio manager API transfers calls made by the applications to the appropriate device driver(s). The computer system also supports a speech recognition system. Speech utterances are picked up by a microphone and sampled at an internal sampling rate. However, the speech recognition system employs a lower sampling rate. The computer system converts microphone data from the higher internal sampling rate to the desired sampling rate by piggybacking the microphone data on command/message streams to an SPI (serial peripheral interface) of the audio DSP. The DSP performs normal low-pass filtering and down sampling on the data stream and then uses the SPI to send out the microphone data at the lower sampling rate.

摘要翻译： 车载计算机系统具有独立于主机CPU的逻辑单元和音频数字信号处理器（DSP）中实现的音频娱乐系统。 音频娱乐系统采用一组乒乓缓冲器和直接存储器访问（DMA）电路来在不同音频设备之间传输数据。 使用映射覆盖技术交换音频数据，其中用于两个音频设备的DMA电路读取和写入同一个存储器缓冲器。 计算机系统提供音频管理器API（应用程序接口），以使得能够在计算机上运行的应用程序能够控制各种音频源，而无需了解底层声音系统的硬件和实现细节。 不同的音频设备及其驱动程序控制音频系统的不同功能，如均衡，音量控制和环绕声解码。 音频管理器API将由应用程序发出的呼叫传送到适当的设备驱动程序。 计算机系统还支持语音识别系统。 语音话音由麦克风拾取并以内部采样率进行采样。 然而，语音识别系统采用更低的采样率。 计算机系统通过将命令/消息流上的麦克风数据连接到音频DSP的SPI（串行外设接口），将麦克风数据从较高的内部采样率转换为所需的采样率。 DSP对数据流进行正常的低通滤波和下采样，然后使用SPI以较低采样率发送麦克风数据。

公开(公告)号：US20110179013A1

公开(公告)日：2011-07-21

申请号：US12691109

申请日：2010-01-21

申请人： Daxin Jiang ,  Hang Li

发明人： Daxin Jiang ,  Hang Li

IPC分类号： G06F17/30

CPC分类号： G06F16/951

摘要： A suffix-tree index may be constructed from search engine search logs. This suffix-tree is scalable and suitable for use in a distributed computing environment. Data mining against the data may proceed with functions including a forward search, backward search, and/or query session retrieval.

摘要翻译： 可以从搜索引擎搜索日志构建后缀树索引。 这个后缀树是可扩展的，适合在分布式计算环境中使用。 针对数据的数据挖掘可以进行包括前向搜索，反向搜索和/或查询会话检索的功能。

公开(公告)号：US20110161330A1

公开(公告)日：2011-06-30

申请号：US13043392

申请日：2011-03-08

申请人： Tie-Yan Liu ,  Hang Li ,  Lei Qi ,  Bin Gao

发明人： Tie-Yan Liu ,  Hang Li ,  Lei Qi ,  Bin Gao

IPC分类号： G06F7/00 ,  G06F17/30

CPC分类号： G06F16/951

摘要： A calculate importance system calculates the global importance of a web page based on a “mean hitting time.” Hitting time of a target web page is a measure of the minimum number of transitions needed to land on the target web page. Mean hitting time of a target web page is an average number of such transitions for all possible starting web pages. The calculate importance system calculates a global importance score for a web page based on the reciprocal of a mean hitting time. A search engine may rank web pages of a search result based on a combination of relevance of the web pages to the search request and global importance of the web pages based on a global hitting time.

摘要翻译： 计算重要度系统基于“平均打击时间”计算网页的全局重要性。目标网页的打击时间是衡量目标网页上所需的最小转换次数的度量。 目标网页的平均打击时间是所有可能的起始网页的平均数量。 计算重要性系统基于平均击球时间的倒数计算网页的全局重要性得分。 搜索引擎可以基于网页与搜索请求的相关性和基于全局打击时间的网页的全球重要性的组合来对搜索结果的网页进行排序。

公开(公告)号：US20110131166A1

公开(公告)日：2011-06-02

申请号：US12957649

申请日：2010-12-01

申请人： Hang Li ,  Hua Zheng ,  Ting-hao Yang ,  Richard W. Tom ,  Yupeng Liao ,  Qi Zhang

发明人： Hang Li ,  Hua Zheng ,  Ting-hao Yang ,  Richard W. Tom ,  Yupeng Liao ,  Qi Zhang

IPC分类号： G06N3/08 ,  G06F15/18

CPC分类号： G06N3/0436 ,  G06F15/18 ,  G06N3/08 ,  G06N7/005

摘要： A method, apparatus, system, article of manufacture, and computer readable storage medium provide the ability to predict and utilize a user's attributes. A sample user behavior and a sample user attribute are collected. A model is trained based on the sample user behavior and sample user attribute. Using the model, a probability of a predicted user attribute based on the sample user behavior is predicted. Using the model and the probability, the predicted user attribute is fuzzily determined based on a real user behavior. The predicted user attribute is used to improve a user's experience.

摘要翻译： 方法，装置，系统，制品和计算机可读存储介质提供预测和利用用户属性的能力。 收集示例用户行为和示例用户属性。 根据样本用户行为和样本用户属性对模型进行培训。 使用该模型，预测基于样本用户行为的预测用户属性的概率。 使用模型和概率，基于真实用户行为模糊地确定预测用户属性。 预测的用户属性用于改善用户体验。