-
公开(公告)号：JP2013178545A
公开(公告)日：2013-09-09
申请号：JP2013087419
申请日：2013-04-18
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： MANJUNATH SHARATH , GARDNER WILLIAM
IPC: G10L19/22 , G10L11/02 , G10L11/04 , G10L11/06 , G10L19/04 , G10L19/12 , G10L19/14 , G10L19/24 , G10L25/78 , G10L25/90 , G10L25/93 , H03M3/04 , H03M7/30
CPC classification number: G10L19/24 , G10L19/20 , G10L2025/783 , G10L2025/935
Abstract: PROBLEM TO BE SOLVED: To perform variable bit rate coding of speech signals.SOLUTION: An input speech signal is classified and a coding mode for achieving the lowest bit rate with allowable speech reproduction quality is selected on the basis of the classification. Low average bit rates are achieved by only employing a high fidelity mode (that is, a high bit rate widely applicable to different types of speech) during a period of portions of the speech where it is required for acceptable output. The input speech signal is classified into active and inactive regions. The active region is further classified into a voiced region, an unvoiced region, and a transient region. Various coding modes are applied according to the required level of fidelity. The modes are dynamically switched among the modes as properties of speech signals vary with time. And where appropriate, regions of the speech are modeled as pseudo random noise, resulting in a significantly low bit rate.
Abstract translation: 要解决的问题：执行语音信号的可变比特率编码。解码：输入语音信号被分类，并且基于分类来选择用于实现具有允许语音再现质量的最低比特率的编码模式。 在需要可接受的输出的语音部分的期间，通过仅采用高保真模式（即广泛适用于不同类型的语音的高比特率）来实现低平均比特率。 输入语音信号分为主动和非活动区域。 有源区进一步分为有声区，无声区和瞬态区。 根据所需的保真级别应用各种编码模式。 这些模式在模式之间动态切换，因为语音信号的属性随时间而变化。 并且在适当的地方，语音区域被建模为伪随机噪声，导致显着低的比特率。
-
公开(公告)号：JP2011123506A
公开(公告)日：2011-06-23
申请号：JP2011002269
申请日：2011-01-07
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： MANJUNATH SHARATH , GARDNER WILLIAM
CPC classification number: G10L19/24 , G10L19/20 , G10L2025/783 , G10L2025/935
Abstract: PROBLEM TO BE SOLVED: To attain a low bit rate in a method and apparatus for variable rate coding of a speech signal. SOLUTION: An input speech signal is classified and an appropriate coding mode is selected based on this classification. For each classification, the coding mode that achieves the lowest bit rate with an acceptable quality of speech reproduction is selected. Low average bit rates are achieved by only employing high fidelity modes during portions of the speech where this fidelity is required for acceptable output. Lower bit rate modes are used during portions of speech where these modes produce acceptable output. The input speech signal is classified into active and inactive regions. Various coding modes are applied to active speech, depending upon the required level of fidelity. Coding modes may be utilized according to the strengths and weaknesses of each particular mode. The apparatus dynamically switches between these modes as the properties of the speech signal vary with time. COPYRIGHT: (C)2011,JPO&INPIT
Abstract translation: 要解决的问题：为了在语音信号的可变速率编码的方法和装置中获得低比特率。
解决方案：输入语音信号被分类，并且基于该分类选择适当的编码模式。 对于每个分类，选择实现具有可接受的语音再现质量的最低比特率的编码模式。 低平均比特率通过在语音的部分期间仅采用高保真模式来实现，其中该可靠输出需要该保真度。 在这些模式产生可接受输出的语音部分期间使用较低比特率模式。 输入语音信号分为主动和非活动区域。 取决于所需的保真级别，各种编码模式被应用于活动语音。 可以根据每个特定模式的优点和缺点来利用编码模式。 当语音信号的属性随时间变化时，该装置动态地在这些模式之间切换。 版权所有（C）2011，JPO＆INPIT
-
公开(公告)号：DE69324906T3
公开(公告)日：2006-08-10
申请号：DE69324906
申请日：1993-01-26
Applicant: QUALCOMM INC
Inventor： GARDNER WILLIAM , JACOBS PAUL
Abstract: A method and system by which parameter data representative of vocoded speech are organized into a data packet for transmission so as to reduce the impact of transmission channel induced errors on the data packet. A data packet is constructed with certain most perceptually significant bits of parameter data at the beginning of the data packet. Following in the data packet are lesser perceptually significant bits of the same parameter data. Other parameter data then follows in the data packet. Interleaved in the data packet following the most perceptually significant bits at the beginning of the data packet are most perceptually significant bits of other parameter data. A parity check code is computed from the most perceptually significant bits in the data packet and also interleaved in the data packet following the most perceptually significant bits at the beginning of the data packet.
-
公开(公告)号：ES2257098T3
公开(公告)日：2006-07-16
申请号：ES99967508
申请日：1999-12-21
Applicant: QUALCOMM INC
Inventor： MANJUNATH SHARATH , GARDNER WILLIAM
Abstract: Un método para codificar una señal de voz cuasi periódica, en donde la señal de voz se representa por una señal residual generada filtrando la señal de voz con un el filtro de análisis de Codificación Predictiva Lineal (LPC), y donde la señal residual se divide en tramas de datos, comprendiendo los pasos de: (a) extraer (1002) periodo representativo de una trama actual de la señal residual como prototipo actual; (b) calcular (1004) un primer juego de parámetros que describen cómo modificar un prototipo anterior de forma que dicho prototipo anterior modificado se aproxime a dicho prototipo actual; (c) seleccionar (1006) uno o más vectores de código de un primer libro de claves, donde dichos vectores de código cuando se suman aproximan la diferencia entre dicho prototipo actual y dicho prototipo anterior modificado, y donde dichos vectores de código son descritos por un segundo juego de parámetros; (d) reconstruir (1010) un prototipo actual basado en dichos primero y segundo juegos de parámetros; (e) interpolar (1012) la señal residual en la región entre dicho prototipo actual reconstruido y un prototipo reconstruido anterior; (f) sintetizar una señal de voz de salida basada en dicha señal residual interpolada.
-
公开(公告)号：NZ520563A
公开(公告)日：2005-08-26
申请号：NZ52056301
申请日：2001-03-07
Applicant: QUALCOMM INC
Inventor： GRILLI FRANCESCO , JAIN AVINASH , GARDNER WILLIAM
Abstract: Methods and apparatus for handing over a mobile station in the system from a CDMA base station to a GSM/TDMA base station are disclosed. A hybrid GSM/CDMA telecommunications system 20 includes base stations 32 operating according to a CDMA interface, and base stations 30 operating according to a GSM/TDMA interface. A communications link is established over the CDMA interface with a mobile station 40. Data is received at the CDMA station from the mobile station 40, in response to a signal received by the mobile station over the GSM/TDMA interface, without breaking the communications link with the CDMA station. The data includes a measurement of the signal strength. The mobile station is handed over from the CDMA to the GSM/TDMA base station in response to the data received, while a weighting factor is applied to the measurement of the signal strength. In particular, a method of conducting intersystem handover from a multicarrier system to a direct spread system is provided. Timing synchronization is also made available through the mobile station.
-
Patent Agency Ranking
公开(公告)号：BR0109046A
公开(公告)日：2003-12-30
申请号：BR0109046
申请日：2001-03-07
Applicant: QUALCOMM INC
Inventor： GRILLI FRANCESCO , JAIN AVINASH , GARDNER WILLIAM
Abstract: A mobile wireless telecommunications system includes base stations of a first type operating according to a first air interface, and base stations of a second type operating according to a second air interface. Methods and apparatus are provided for handing over a mobile station in the system from a first base station, which is of the first type, to a second base station, which is of the second type. A communications link is established over the first air interface between the mobile station and the first base station. Data are received from the mobile station responsive to a signal received by the mobile station over the second air interface from the second base station, substantially without breaking the communications link with the first base station. The mobile station is handed over from the first to the second base station responsive to the data received therefrom. In particular, a method of conducting intersystem handover from a multicarrier system to a direct spread system is provided. Timing synchronization is also advantageously made available through the mobile station.
-
公开(公告)号：DE69904957D1
公开(公告)日：2003-02-20
申请号：DE69904957
申请日：1999-09-03
Applicant: QUALCOMM INC
Inventor： GARDNER WILLIAM , AGRAWAL AVNEESH , SIH C , ZOU QIUZHEN , KANG INYUP
IPC: G01S19/30 , G01S1/00 , G01S5/00 , G01S5/14 , G01S19/23 , G01S19/24 , G01S19/25 , G01S19/29 , G01S19/37 , H04Q7/34 , H04Q7/38 , G01S1/04
Abstract: The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. One embodiment comprises a method for performing position location in a wireless communication system using a set of signals transmitted from a set of satellites including the steps of receiving signal samples, rotating an acquisition code by a first rotation amount yielding a rotated acquisition code, despreading said signal samples using rotated acquisition code yielding despread data, accumulating said despread data over a first duration yielding partially accumulated data, rotating said partially accumulated data by a second rotation amount yielding rotated data and accumulating said rotated data.
-
公开(公告)号：AU2001240108C1
公开(公告)日：2001-09-17
申请号：AU2001240108
申请日：2001-03-07
Applicant: QUALCOMM INC
Inventor： GRILLI FRANCESCO , GARDNER WILLIAM , JAIN AVINASH
Abstract: A mobile wireless telecommunications system includes base stations of a first type operating according to a first air interface, and base stations of a second type operating according to a second air interface. Methods and apparatus are provided for handing over a mobile station in the system from a first base station, which is of the first type, to a second base station, which is of the second type. A communications link is established over the first air interface between the mobile station and the first base station. Data are received from the mobile station responsive to a signal received by the mobile station over the second air interface from the second base station, substantially without breaking the communications link with the first base station. The mobile station is handed over from the first to the second base station responsive to the data received therefrom. In particular, a method of conducting intersystem handover from a multicarrier system to a direct spread system is provided. Timing synchronization is also advantageously made available through the mobile station.
-
公开(公告)号：ID28458A
公开(公告)日：2001-05-24
申请号：ID20010800
申请日：1999-09-03
Applicant: QUALCOMM INC
Inventor： GARDNER WILLIAM , AGRAWAL AVNEESH , SIH GILBERT C , ZOU QIUZHEN , KANG INYUP
IPC: G01S19/30 , G01S1/00 , G01S5/00 , G01S5/14 , G01S19/23 , G01S19/24 , G01S19/25 , G01S19/29 , G01S19/37 , H04Q7/34 , H04Q7/38 , G01S1/04
Abstract: The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. One embodiment comprises a method for performing position location in a wireless communication system using a set of signals transmitted from a set of satellites including the steps of receiving signal samples, rotating an acquisition code by a first rotation amount yielding a rotated acquisition code, despreading said signal samples using rotated acquisition code yielding despread data, accumulating said despread data over a first duration yielding partially accumulated data, rotating said partially accumulated data by a second rotation amount yielding rotated data and accumulating said rotated data.
-
公开(公告)号：DE69324906T2
公开(公告)日：1999-12-02
申请号：DE69324906
申请日：1993-01-26
Applicant: QUALCOMM INC
Inventor： GARDNER WILLIAM , JACOBS PAUL
Abstract: A method and system by which parameter data representative of vocoded speech are organized into a data packet for transmission so as to reduce the impact of transmission channel induced errors on the data packet. A data packet is constructed with certain most perceptually significant bits of parameter data at the beginning of the data packet. Following in the data packet are lesser perceptually significant bits of the same parameter data. Other parameter data then follows in the data packet. Interleaved in the data packet following the most perceptually significant bits at the beginning of the data packet are most perceptually significant bits of other parameter data. A parity check code is computed from the most perceptually significant bits in the data packet and also interleaved in the data packet following the most perceptually significant bits at the beginning of the data packet.
-
-
-
-
-
-
-
-
-
Search Results
59
records
(took 0.023 seconds)
