公开(公告)号：US20040116112A1

公开(公告)日：2004-06-17

申请号：US10648049

申请日：2003-08-26

Inventor： Steven D. Gray

IPC: H04L012/28 ,  H04Q007/20

CPC classification number: H04W72/08 ,  H04L1/201 ,  H04W24/10 ,  H04W84/12

Abstract: Apparatus, and an associated method, for generating a message summary field. The message summary field indicates whether 802.11-formatted data packets are communicated upon a frequency range to which a mobile station operable in an IEEE 802.11 radio communication system is tuned. An indicator indicates whether an 802.11 data packet is detected. And, a reporter generates a measurement summary which includes a measurement summary field populated with a value indicating the determination. Subsequent analysis of the value of the field of the measurement summary is utilized pursuant to dynamic frequency selection operations.

Abstract translation: 用于生成消息摘要字段的装置和相关联的方法。 消息摘要字段指示是否在IEEE 802.11无线电通信系统中可操作的移动台被调谐的频率范围上传送802.11格式的数据分组。 指示灯是否检测到802.11数据包。 并且，记者生成测量摘要，其包括填充有指示确定的值的测量摘要字段。 随后根据动态频率选择操作对测量总结领域的价值进行分析。

公开(公告)号：US06637006B1

公开(公告)日：2003-10-21

申请号：US09521450

申请日：2000-03-07

Applicant: Mark Burton

Inventor： Mark Burton

IPC: G06F1100

CPC classification number: H04L1/0054 ,  H04L1/0059 ,  H04L1/007 ,  H04L1/201 ,  H04L1/203

Abstract: A received frame is provided to a first decoder and a first time reverse unit. The first decoder decodes the provided frame and outputs the decoded frame. The first time reverse unit reverses bits of the provided frame in time direction and outputs the time reversed frame. The time reversed frame is provided to a second decoder. The second decoder decodes the time reversed frame. This decoded frame is then provided to a second time reverse unit. The second time reverse unit reverses bits of the decoded frame in time direction and outputs the frame. The frame is outputted from the first decoder is compared with the frame is outputted from the second time reverse unit by comparator. If any difference exist between the two frames then the received frame is judged as unreliable.

Abstract translation: 接收的帧被提供给第一解码器和第一时间反向单元。 第一解码器解码提供的帧并输出解码的帧。 第一次反转单元在时间方向反转所提供的帧的位，并输出时间反转帧。 将时间反转帧提供给第二解码器。 第二个解码器解码时间反转帧。 然后将该解码帧提供给第二时间反向单元。 第二次反转单元在时间方向上反转解码帧的位并输出帧。 将从第一解码器输出的帧与比较器从第二时间反向单元输出帧进行比较。 如果两帧之间存在任何差异，则接收的帧被判定为不可靠。

公开(公告)号：US06470470B2

公开(公告)日：2002-10-22

申请号：US09019656

申请日：1998-02-06

Applicant: Kari Jarvinen ,  Matti Kajala ,  Janne Vainio

Inventor： Kari Jarvinen ,  Matti Kajala ,  Janne Vainio

IPC: H03M1300

CPC classification number: H04L1/20 ,  H04L1/0009 ,  H04L1/201

Abstract: Focused error correction and/or focused error detection is used in the information coding system. A speech encoding method, in which the number of speech parameter bits on which error correction coding and/or error detection coding focuses is automatically adjusted in relation to the number of total speech parameter bits as a function of the quality of the information transfer connection. There is no need to reduce the number of bits used for speech encoding. Thus the voice quality of the speech remains high. The error correction and/or error detection is focused on the bits most important for the voice quality e.g., as a function of the C/I (Channel to Interference)13 parameter describing the quality of the information transfer connection. The muting of speech synthesizing occuring in prior systems on poor information transfer connection is reduced by using focused error detection.

Abstract translation: 在信息编码系统中使用聚焦误差校正和/或聚焦误差检测。 一种语音编码方法，其中以与信息传送连接的质量的函数相关的总话音参数位数来自动调整纠错编码和/或错误检测编码对焦的语音参数位数。 不需要减少用于语音编码的位数。 因此语音的语音质量仍然很高。 错误校正和/或错误检测集中于对于语音质量最重要的位，例如，作为描述信息传输连接的质量的C / I（信道到干扰）13参数的函数。 通过使用聚焦误差检测来减少在现有系统中发生的信息传递不良连接上的语音合成静音。

公开(公告)号：US06393074B1

公开(公告)日：2002-05-21

申请号：US09224047

申请日：1998-12-31

Applicant: Giridhar D. Mandyam ,  Yuan Kang Lee ,  Alberto Guiterrez

Inventor： Giridhar D. Mandyam ,  Yuan Kang Lee ,  Alberto Guiterrez

IPC: H04L108

CPC classification number: H04L1/0059 ,  H04L1/0046 ,  H04L1/0054 ,  H04L1/08 ,  H04L1/201

Abstract: A multi-rate data receiver includes a decoding section for processing the received encoded data symbols via multiple paths to make a determination as to the rate of the received data. A statistical analysis is made of the incoming data prior to decoding, and rate selection made among one of the multiple highest rates. If the determination is not that the data is associated with the highest rate, the data is processed through multiple parallel decoding paths and the decoded data on the output thereof evaluated to determine which of the multiple paths is acceptable and associated with the incoming data rate.

Abstract translation: 多速率数据接收机包括用于经由多个路径处理所接收的编码数据符号以对接收数据的速率进行确定的解码部分。 对解码之前的输入数据进行统计分析，并以多个最高速率之一进行速率选择。 如果确定不是数据与最高速率相关联，则通过多个并行解码路径处理数据，并且对其输出上的解码数据进行评估，以确定哪个多路径是可接受的并且与输入数据速率相关联。

公开(公告)号：US20020035713A1

公开(公告)日：2002-03-21

申请号：US09019656

申请日：1998-02-06

Inventor： KARI JARVINEN ,  MATTI KAJALA ,  JANNE VAINIO

IPC: H04L001/00 ,  G06F011/00 ,  G06F011/30 ,  H03M013/00 ,  G08C025/00 ,  H04L001/18

CPC classification number: H04L1/20 ,  H04L1/0009 ,  H04L1/201

Abstract: Focused error correction and/or focused error detection is used in the information coding system according to the invention. The purpose of the present invention is to present a speech encoding method, in which the number of speech parameter bits on which error correction coding and/or error detection coding focuses is automatically adjusted in relation to the number of total speech parameter bits as the function of the quality of the information transfer connection. In the information encoding system according to the invention there is no need to reduce the number of bits used for speech encoding, due to which the voice quality of the speech remains high. In the information encoding system according to the invention the error correction and/or error detection is focused on the bits most important for the voice quality e.g. as the function of the C/I (Channel to Interference)-parameter describing the quality of the information transfer connection. The muting of speech synthesizing occurring in prior known systems on poor information transfer connection is in the information encoding method according to the invention reduced by using focused error detection.

Abstract translation: 在根据本发明的信息编码系统中使用聚焦误差校正和/或聚焦误差检测。 本发明的目的在于提出一种语音编码方法，其中，将自动调整纠错编码和/或错误检测编码对焦的语音参数位数相对于总语音参数位数作为函数 的质量信息传递连接。 在根据本发明的信息编码系统中，不需要减少用于语音编码的比特数，由此语音的语音质量保持很高。 在根据本发明的信息编码系统中，纠错和/或错误检测集中在对于语音质量最重要的位，例如 作为描述信息传输连接质量的C / I（信道到干扰）参数的函数。 在现有的已知系统中出现的差的信息传输连接上的语音合成的静音在根据本发明的信息编码方法中通过使用聚焦错误检测而减少。

公开(公告)号：US20020012330A1

公开(公告)日：2002-01-31

申请号：US09761341

申请日：2001-01-16

Inventor： Serguei Glazko ,  Baaziz Achour ,  Yu Chuan Lin

IPC: H04Q007/28

CPC classification number: H04L1/20 ,  H04J3/14 ,  H04J3/17 ,  H04L1/201

Abstract: A system and method for detecting discontinuous transmission (DTX) frames. The inventive method includes the steps of receiving data transmitted in a plurality of frames; classifying each of the frames; analyzing the classification of a number of successive frames of the received data and providing a metric with respect thereto; and determining, in response to the metric, if a frame is a discontinuous frame. In the illustrative embodiment, the step of classifying includes the step of error checking the frames using a cyclic redundancy check (CRC) error checking protocol. The received frames are classified as good frames (G), erasure frames (E), or discontinuous frames (D). A numerical value is assigned to each of the frames based on the classification thereof. Next, the frames are filtered to provide an output YnnullYnnull1nullXn where nullnnull is a frame number, Yn is the filter output for a given frame n, Ynnull1 is the filter output for a previous frame, and Xn is a stream of input frames. A threshold is set for the output Yn to facilitate the detection of discontinuous frames. That is, a detection of a discontinuous transmission frame is indicated when a frame is classified as an nullerasurenull and the filter output exceeds the threshold. On the detection of a discontinuous frame, the classification of the frame is changed from nullerasurenull to nulldiscontinuousnull. By reclassifying improperly classified erasure frames, the mobile receiver is inhibited from requesting retransmission of the frames or a change in the transmit power level. Consequently, network throughput and capacity are optimized and system power is conserved.

Abstract translation: 一种用于检测不连续传输（DTX）帧的系统和方法。 本发明的方法包括以下步骤：接收以多个帧发送的数据; 对每个框架进行分类; 分析所接收数据的连续帧的数目的分类并提供与之相关的度量; 以及响应于所述度量，确定帧是不连续帧。 在说明性实施例中，分类步骤包括使用循环冗余校验（CRC）错误检查协议对帧进行错误校验的步骤。 所接收的帧被分类为好帧（G），擦除帧（E）或不连续帧（D）。 基于其分类，将数值分配给每个帧。 接下来，对帧进行滤波以提供输出Yn = Yn-1 + Xn，其中“n”是帧号，Yn是给定帧n的滤波器输出，Yn-1是先前帧的滤波器输出，以及 Xn是输入帧流，为输出Yn设定阈值，便于检测不连续帧，也就是说，当帧被分类为“擦除”并且滤波器输出时，指示不连续传输帧的检测 超过阈值。 在不连续帧的检测中，帧的分类从“擦除”改变为“不连续”。 通过重新分类不正确分类的擦除帧，禁止移动接收机请求重发帧或发射功率电平的变化。 因此，网络吞吐量和容量得到优化，系统功耗得以节省。

公开(公告)号：US5918204A

公开(公告)日：1999-06-29

申请号：US773835

申请日：1996-12-27

Applicant: Makoto Tsurumaru

Inventor： Makoto Tsurumaru

IPC: H03M13/41 ,  H04B7/26 ,  H04B14/04 ,  H04J3/00 ,  H04J3/14 ,  H04L1/00 ,  H04L1/20 ,  H04L25/03 ,  G10L3/02

CPC classification number: H04L1/0057 ,  H03M13/2707 ,  H03M13/41 ,  H03M13/6331 ,  H04B7/2656 ,  H04L1/0061 ,  H04L1/201 ,  H04L2025/03407 ,  H04L25/03178

Abstract: A speech frame is converted to speech bursts and interleaved over a predetermined number of TDMA frames for transmission. At a receive site, the transmitted signal is equalized and a quality signal indicating the quality of each burst signal is produced from the equalized signal. The equalized signal is de-interleaved, and then Vitrerbi-decoded speech samples are produced. A CRC circuit performs an error check operation on the decoded speech samples to produce an error bit if a speech frame failed the check. A decision circuit compares the quality signal with a first reference value and produces a first disable signal when it is lower than the first reference value. The decision circuit compares a total sum of the quality signals produced from the predetermined number of burst signals with a second reference value and produces a second disable signal when the total sum of the quality signals is lower than the second reference value. A speech decoder operates on the decoded speech samples to recover speech frames and masks speech frames in response to the error bit from the CRC circuit and the first and second disable signals from the decision circuit.

Abstract translation: 将语音帧转换为语音脉冲串，并在预定数量的TDMA帧上进行交织以进行传输。 在接收站点，发送的信号被均衡，并且从均衡的信号产生指示每个突发信号的质量的质量信号。 均衡信号被解交织，然后产生Vitrerbi解码语音样本。 如果语音帧失败，则CRC电路对解码的语音样本执行错误校验操作，以产生错误位。 判定电路将质量信号与第一参考值进行比较，并且当其低于第一参考值时产生第一禁用信号。 判定电路将由预定数量的脉冲串信号产生的质量信号的总和与第二参考值进行比较，并且当质量信号的总和低于第二参考值时产生第二禁用信号。 语音解码器对解码的语音样本进行操作以响应于来自CRC电路的错误位和来自判定电路的第一和第二禁用信号来恢复语音帧并屏蔽语音帧。

公开(公告)号：US5557639A

公开(公告)日：1996-09-17

申请号：US322445

申请日：1994-10-05

Applicant: Ilkka Heikkila ,  Harri Jokinen ,  Jukka Ranta

Inventor： Ilkka Heikkila ,  Harri Jokinen ,  Jukka Ranta

IPC: H04B15/00 ,  H04B7/26 ,  H04L1/20 ,  H04B13/02 ,  H04B17/00

CPC classification number: H04L1/201 ,  H04L1/20 ,  H04L1/208

Abstract: The invention provides an improved method and apparatus for identifying a bad GSM speech frame. Both the estimated signal-to-noise ratio (ESNR) of the received signal and the pseudo bit error rate (PBER) of a recorded speech signal are used to determine whether or not a speech frame is bad.

Abstract translation: 本发明提供了一种用于识别不良GSM语音帧的改进方法和装置。 接收信号的估计信噪比（ESNR）和记录的语音信号的伪误码率（PBER）都用于确定语音帧是否不良。

公开(公告)号：US5497383A

公开(公告)日：1996-03-05

申请号：US007215

申请日：1993-01-22

Applicant: Joseph F. Thome ,  Arvind S. Arora ,  Niels Vinggaard

Inventor： Joseph F. Thome ,  Arvind S. Arora ,  Niels Vinggaard

IPC: G06F11/10 ,  H03M13/00 ,  H04L1/00 ,  H04L1/20

CPC classification number: H04L1/201 ,  H03M13/00 ,  H04L1/0045 ,  H04L1/208 ,  H04L1/0054 ,  H04L1/007

Abstract: An error detector circuit, and an associated method, for a discrete receiver. The error detector circuit indicates bad frames of binary information signals which contain distorted bits of data in numbers so great as to prevent a convolutional decoder from generating, accurately, a decoded signal. When bit errors are detected in numbers beyond a first preselected value of the signal quality of a received signal combined with the detected number of bit errors forms a signal beyond a second preselected value, a bad frame is indicated.

Abstract translation: 用于离散接收机的误差检测器电路和相关联的方法。 错误检测器电路指示二进制信息信号的错误帧，其包含数字的失真位数，以致于防止卷积解码器精确地产生解码信号。 当以超过接收信号的信号质量的第一预选值与检测到的比特错误的数量组合的数字来检测比特错误时，形成超出第二预选值的信号，指示不良帧。

公开(公告)号：US5493584A

公开(公告)日：1996-02-20

申请号：US172792

申请日：1993-12-27

Applicant: Stephen P. Emeott

Inventor： Stephen P. Emeott

IPC: H03M13/00 ,  H03M13/41 ,  H04L1/00 ,  H04L1/20 ,  H04L25/03 ,  H04B3/46 ,  G06F11/10 ,  H03D1/00

CPC classification number: H04L1/0071 ,  H03M13/00 ,  H03M13/41 ,  H03M13/6325 ,  H03M13/6502 ,  H04L1/007 ,  H04L1/201 ,  H04L1/208 ,  H04L25/03866

Abstract: In a receiver, a channel quality metric (220) is determined by demodulating a received second stream of discrete data elements (205) using a received first stream of discrete data elements (203) to produce a demodulated second stream of discrete data elements (212). The demodulated second stream is decoded, leading to an estimate of the second stream of discrete data elements (214). The estimate of the second stream is then re-encoded and the resulting re-encoded stream of discrete data elements (216) is compared with the demodulated second stream to produce the channel quality metric. Derived in this manner, the channel quality metric provides a method for detecting decoding errors in a stream of critical data elements.

Abstract translation: 在接收机中，通过使用接收到的离散数据元素（203）的第一流解调接收到的离散数据元素（205）的第二流来确定信道质量度量（220），以产生解调的第二离散数据元素流（212 ）。 解调的第二流被解码，导致离散数据元素（214）的第二流的估计。 然后对第二流的估计进行重新编码，并将所得到的重新编码的离散数据元素流（216）与解调的第二流进行比较以产生信道质量度量。 以这种方式得出，信道质量度量提供了用于检测关键数据元素流中的解码错误的方法。