公开(公告)号：US06816832B2

公开(公告)日：2004-11-09

申请号：US09878503

申请日：2001-06-11

申请人： Seppo Alanara ,  Pekka Kapanen

发明人： Seppo Alanara ,  Pekka Kapanen

IPC分类号： H04B146

CPC分类号： G10L19/012

摘要： A comfort noise block, that include a hangover period and comfort noise parameters, is transmitted in such a manner that it is not interrupted by other messages, such as FACCH messages. This is accomplished in a mobile station by a determination of whether any FACCH messages are required to be transmitted. If such FACCH messages exist, a further determination may be made as to which transmission can be made in the shortest time (i.e., the FACCH message or messages or the comfort noise parameters message), and this transmission is made first. In any event the comfort noise parameters block is transmitted without interruption. In a further embodiment of this invention the comfort noise parameters message is transmitted by being concatenated with another message, such as a neighbor channel measurement results message, so as to reduce overhead, conserve bandwidth, and reduce power consumption. An element of the comfort noise parameters message is a Random Excitation Spectral Control (RESC) information element, which is used in the decoder for improving the spectral content of the generated comfort noise so as to better match the background noise at the transmitter.

公开(公告)号：US5432884A

公开(公告)日：1995-07-11

申请号：US36544

申请日：1993-03-22

申请人： Pekka Kapanen ,  Yrjo Neuvo ,  Kari Jarvinen

发明人： Pekka Kapanen ,  Yrjo Neuvo ,  Kari Jarvinen

IPC分类号： G10L19/06 ,  G10L9/00

CPC分类号： G10L19/06

摘要： Disclosed herein are methods and apparatus for improving the quality of synthesized speech that is transmitted through a channel that is susceptible to transmission errors. In a presently preferred embodiment of the invention a speech signal is assumed to be first encoded using a Linear Predictive Coding (LPC) technique prior to transmission. The parameters that describe the short-term spectral behavior of the speech signal are received and then applied to and processed by a non-linear median processing block only on an occurrence of a predetermined number of transmission errors in the received LPC speech signal. The median-processed short term speech parameters are subsequently employed, together with a received excitation signal, in a synthesis filter to synthesize a speech signal of improved quality over what would be obtained if the short term speech parameters were not median processed to compensate for the transmission errors.

摘要翻译： 这里公开了用于改善通过易于传输错误的信道传输的合成语音质量的方法和装置。 在本发明的当前优选实施例中，假定在传输之前使用线性预测编码（LPC）技术首先编码语音信号。 描述语音信号的短期频谱行为的参数仅在所接收的LPC语音信号中发生预定数量的传输错误的情况下才被非线性中值处理块应用并被处理。 随后将中值处理的短期语音参数与接收到的激励信号一起用于合成滤波器中，以合成具有改善质量的语音信号，如果短期语音参数未被中值处理以补偿 传输错误。

公开(公告)号：US5960389A

公开(公告)日：1999-09-28

申请号：US965303

申请日：1997-11-06

申请人： Kari Jarvinen ,  Pekka Kapanen ,  Vesa Ruoppila ,  Jani Rotola-Pukkila

发明人： Kari Jarvinen ,  Pekka Kapanen ,  Vesa Ruoppila ,  Jani Rotola-Pukkila

IPC分类号： G10L19/00 ,  G10C3/02

CPC分类号： G10L19/012

摘要： An improved method for generating comfort noise (CN) in a mobile terminal operating in a discontinuous transmission (DTX) mode. In one embodiment the invention provides an improved method for comfort noise generation, in which a random excitation is modified by a spectral control filter so that the frequency content of comfort noise and background noise become similar. In another embodiment the transmitter identifies speech coding parameters that are not representative of the actual background noise, and replaces the identified parameters with parameters having a median value. In this manner the non-representative parameters do not skew the result of an averaging operation.

公开(公告)号：US07382770B2

公开(公告)日：2008-06-03

申请号：US10374262

申请日：2003-02-27

申请人： Janne Bergman ,  Pekka Kapanen

发明人： Janne Bergman ,  Pekka Kapanen

IPC分类号： H04L12/66

CPC分类号： G06F17/271 ,  G06F17/2765

摘要： A communication architecture for delivery of grammar and speech related information such as text-to-speech (TTS) data to a speech recognition server operating with a wireless telecommunication system for use with automatic speech recognition and interactive voice-based applications. In the invention, a mobile client retrieves a Web page containing multi-modal content hosted on a origin server via WAP gateway. The content may include a grammar file and/or TTS strings embedded in the content or reference URL(s) pointing to their storage locations. The client then sends the grammar and/or TTS strings to a speech recognition server via a wireless packet streaming protocol channel. When URL(s) are received by the client and sent to the SRS, the grammar file and/or TTS strings are obtained via a high speed HTTP connection. The speech processing results and the synthesized speech are returned to the client over the established wireless UDP connection.

摘要翻译： 用于将语音和语音相关信息（例如文本到语音（TTS））数据传送到用无线电信系统操作的语音识别服务器用于与自动语音识别和交互式基于语音的应用一起使用的通信架构。 在本发明中，移动客户端通过WAP网关检索包含在原始服务器上托管的多模态内容的网页。 内容可以包括嵌入在指向其存储位置的内容或引用URL中的语法文件和/或TTS字符串。 然后，客户端经由无线分组流协议信道将语法和/或TTS字符串发送到语音识别服务器。 当客户端接收到URL并发送到SRS时，语法文件和/或TTS字符串通过高速HTTP连接获得。 语音处理结果和合成语音通过建立的无线UDP连接返回给客户端。

公开(公告)号：US06850883B1

公开(公告)日：2005-02-01

申请号：US09601827

申请日：1998-02-09

申请人： Pekka Kapanen ,  Janne Vainio

发明人： Pekka Kapanen ,  Janne Vainio

IPC分类号： G10L19/005 ,  G10L19/012 ,  G10L19/16 ,  H04B7/26 ,  H04W88/18 ,  G10L19/00

CPC分类号： H04W88/181 ,  G10L19/005 ,  G10L19/012 ,  G10L19/173

摘要： This invention is related to tandem free operation (TFO) in mobile cellular systems. The present invention implements a tandem free operation by using a special feedback loop which makes the decoded parameters available, performs the comfort noise insertion and bad frame handling operations, produces the parameter quantisation indices corresponding to the output of these operations, and synchronises the speech encoders and the speech decoders in the transmission path from the uplink mobile station to the downlink mobile station. This functionality is realized by partly decoding and re-encoding the parameters and synchronising and resetting the quantiser prediction memories in a specific manner. A basic idea of the invention is, that during BFH and CNI processes, a re-encoding block produces models of encoded speech parameters from the BFH/CNI processed speech parameters. These models of encoded speech parameters are then transmitted to the receiving end. The present invention provides a solution to the problem created by predictive, more generally non-stateless encoders in TFO operation.

摘要翻译： 本发明涉及移动蜂窝系统中的串联自由操作（TFO）。 本发明通过使用使得解码参数可用，执行舒适噪声插入和不良帧处理操作的特殊反馈回路实现串联自由操作，产生与这些操作的输出对应的参数量化指标，并且使语音编码器 以及从上行链路移动台到下行移动站的传输路径中的语音解码器。 该功能通过部分解码和重新编码参数并以特定方式同步和重置量化器预测存储器来实现。 本发明的基本思想是，在BFH和CNI过程中，重新编码块从BFH / CNI处理的语音参数产生编码语音参数的模型。 然后将这些编码语音参数的模型发送到接收端。 本发明提供了在TFO操作中由预测的，更普遍的非无状态编码器产生的问题的解决方案。

公开(公告)号：US06658064B1

公开(公告)日：2003-12-02

申请号：US09387369

申请日：1999-08-31

申请人： Jani Rotola-Pukkila ,  Hannu Mikkola ,  Pekka Kapanen ,  Janne Vainio

发明人： Jani Rotola-Pukkila ,  Hannu Mikkola ,  Pekka Kapanen ,  Janne Vainio

IPC分类号： G10L1106

CPC分类号： H04L1/0072 ,  H04L1/0071

摘要： The invention relates to a method for transmitting background noise information including a silence descriptor identifier and background noise parameters in a communication system in which the information to be transmitted is formed into data frames. The data frames are subjected to channel coding to form channel-coded frames. The channel-coded frames are interleaved to be transmitted in two or more data transmission frames, and information of two channel-coded frames is transmitted in each data transmission frame. A first silence descriptor frame is formed provided with the silence descriptor identifier. The first silence descriptor frame is subjected to channel coding to form a channel-coded silence descriptor frame. The channel-coded silence descriptor frame is transmitted in two or more data transmission frames, and at least one data transmission frame transmitting part of the channel-coded silence descriptor frame is also used to transmit at least the background noise parameters.

摘要翻译： 本发明涉及一种用于在其中要发送的信息被形成为数据帧的通信系统中发送包括静音描述符标识符和背景噪声参数的背景噪声信息的方法。 对数据帧进行信道编码以形成信道编码帧。 信道编码帧被交织以在两个或更多个数据传输帧中发送，并且在每个数据传输帧中发送两个信道编码帧的信息。 形成了具有静默描述符标识符的第一个静默描述符帧。 对第一个静默描述符帧进行信道编码以形成信道编码的静默描述符帧。 信道编码静音描述符帧在两个或多个数据传输帧中发送，并且至少一个数据传输帧发送部分信道编码静音描述符帧也用于至少发送背景噪声参数。

公开(公告)号：US06606593B1

公开(公告)日：2003-08-12

申请号：US09371332

申请日：1999-08-10

申请人： Kari Jarvinen ,  Pekka Kapanen ,  Vesa Ruoppila ,  Jani Rotola-Pukkila

发明人： Kari Jarvinen ,  Pekka Kapanen ,  Vesa Ruoppila ,  Jani Rotola-Pukkila

IPC分类号： G10L1908

CPC分类号： G10L19/012

摘要： An improved method for generating comfort noise (CN) in a mobile terminal operating in a discontinuous transmission (DTX) mode. In one embodiment the invention provides an improved method for comfort noise generation, in which a random excitation is modified by a spectral control filter so that the frequency content of comfort noise and background noise become similar. In another embodiment the transmitter identifies speech coding parameters that are not representative of the actual background noise, and replaces the identified parameters with parameters having a median value. In this manner the non-representative parameters do not skew the result of an averaging operation.

摘要翻译： 一种用于在以不连续传输（DTX）模式操作的移动终端中产生舒适噪声（CN）的改进方法。 在一个实施例中，本发明提供了一种用于舒适噪声产生的改进方法，其中随机激励由频谱控制滤波器修改，使得舒适噪声和背景噪声的频率含量变得相似。 在另一个实施例中，发射机识别不代表实际背景噪声的语音编码参数，并用具有中值的参数替换所识别的参数。 以这种方式，非代表性参数不会使平均运算的结果偏斜。

公开(公告)号：US06269331B1

公开(公告)日：2001-07-31

申请号：US08936755

申请日：1997-09-25

申请人： Seppo Alanara ,  Pekka Kapanen

发明人： Seppo Alanara ,  Pekka Kapanen

IPC分类号： G10L302

CPC分类号： G10L19/012

摘要： A comfort noise block, that include a hangover period and comfort noise parameters, is transmitted in such a manner that it is not interrupted by other messages, such as FACCH messages. This is accomplished in a mobile station by a determination of whether any FACCH messages are required to be transmitted. If such FACCH messages exist, a further determination may be made as to which transmission can be made in the shortest time (i.e., the FACCH message or messages or the comfort noise parameters message), and this transmission is made first. In any event the comfort noise parameters block is transmitted without interruption. In a further embodiment of this invention the comfort noise parameters message is transmitted by being concatenated with another message, such as a neighbor channel measurement results message, so as to reduce overhead, conserve bandwidth, and reduce power consumption. An element of the comfort noise parameters message is a Random Excitation Spectral Control (RESC) information element, which is used in the decoder for improving the spectral content of the generated comfort noise so as to better match the background noise at the transmitter.

摘要翻译： 发送包括宿醉期和舒适噪声参数的舒适噪声块，使得其不被诸如FACCH消息的其他消息中断。 这通过确定是否需要发送任何FACCH消息在移动台中实现。 如果存在这样的FACCH消息，则可以进一步确定在最短时间内（即，FACCH消息或消息或舒适噪声参数消息）可以进行哪些传输，并且首先进行该传输。 无论如何，无噪声地传输舒适噪声参数块。 在本发明的另一实施例中，舒适噪声参数消息通过与诸如邻近信道测量结果消息的另一个消息相连接来发送，以便减少开销，节省带宽并降低功耗。 舒适噪声参数消息的要素是随机激发频谱控制（RESC）信息元素，其用于解码器中以改善所产生的舒适噪声的频谱含量，以便更好地匹配发射机的背景噪声。

公开(公告)号：US5835889A

公开(公告)日：1998-11-10

申请号：US672932

申请日：1996-06-28

申请人： Pekka Kapanen

发明人： Pekka Kapanen

IPC分类号： G10L19/00 ,  G10L11/00 ,  H04B1/38 ,  H04B14/04 ,  G10L9/18

CPC分类号： H04B14/04

摘要： A method to detect a presence of a hangover period in a speech decoder in a communication system that utilizes discontinuous transmission between a transmitter and a receiver. The discontinuous transmission is defined by temporally sequential frame periods of which some periods will contain a transmitted frame and some periods will contain no transmission. The discontinuous transmission is constituted by information transmission periods of at least one frame that contain information given by a user to the transmitter, and silence periods having a length of at least one frame period and containing other information than that given by the user. An irregularly occurring period (T) of at least one frame exists between an information transmission period and the following silence period, the irregularly occurring period forming a hangover period for determining the information relating to the silence period. In the receiver the number of frame periods is counted until a certain moment; the beginning of the silence period is detected; and, based on said counted number of frame periods and the beginning of the silence period, a determination is made whether or not there is a hangover period (T) between the information transmission period and the silence period.

摘要翻译： 一种检测在利用发射机和接收机之间的不连续传输的通信系统中的语音解码器中的宿醉期的存在的方法。 不连续传输由时间顺序的帧周期定义，其中一些周期将包含传输的帧，并且一些周期将不包含传输。 不连续传输由包含用户给发送者的信息的至少一个帧的信息传输周期以及具有至少一个帧周期的长度并且包含比用户给出的其他信息的静默周期构成。 在信息传播期间和以后的静默期间存在至少一帧的不规则发生期间（T），形成用于确定与沉默期间有关的信息的宿醉期间的不规律发生期间。 在接收机中，帧周期数被计数到一定时刻; 检测到沉默期的开始; 并且基于所述计数的帧周期数和静默期的开始，判定在信息发送期间和静默期间是否存在中止期间（T）。