公开(公告)号：JP2010217912A

公开(公告)日：2010-09-30

申请号：JP2010112494

申请日：2010-05-14

Applicant: Motorola Inc ,  モトローラ・インコーポレイテッドMotorola Incorporated

Inventor： JASIUK MARK A ,  RAMABADRAN TENKASI V ,  MITTAL UDAR ,  ASHLEY JAMES P ,  MCLAUGHLIN MICHAEL J

IPC: G10L19/08 ,  G10L19/14 ,  H03M7/30

CPC classification number: G10L19/09

Abstract: PROBLEM TO BE SOLVED: To provide a method and apparatus for performing speech coding which improves speech quality. SOLUTION: The method for encoding speech by a speech coding device comprises: a stage for receiving an input signal; a stage for creating an object vector on the basis of the input signal; a stage for creating a plurality of weighted adaptive code book vectors on the basis of a signal sub-sample resolution delay value, an adaptive code book, and a weighted synthesis filter; a stage for creating a weighted fixed code book(FCB) exiting vector on the basis of the object vector and the plurality of weighted adaptive code book vector; a stage for creating a plurality of correlation terms on the basis of the object vector, the plurality of weighted adaptive code book vectors and the weighted FCB exciting vector; and a stage for selecting a gain vector from a table in response to an error minimizing reference. The gain vector comprises at least two adaptive code book gains and one fixed code book gain, and the error minimizing reference is based on the plurality of correlation terms. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种提高语音质量的用于执行语音编码的方法和装置。 解决方案：由语音编码装置编码语音的方法包括：用于接收输入信号的级; 基于输入信号创建对象向量的阶段; 基于信号子采样分辨率延迟值，自适应码本和加权合成滤波器创建多个加权自适应码本矢量的阶段; 基于所述对象矢量和所述多个加权自适应编码矢量生成退出向量的加权固定码本（FCB）的阶段; 基于对象矢量，多个加权自适应码本矢量和加权FCB激励矢量创建多个相关项的阶段; 以及用于响应于误差最小化参考从表中选择增益矢量的阶段。 增益矢量包括至少两个自适应码本增益和一个固定码本增益，并且误差最小化参考是基于多个相关项。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：BRPI0407593A

公开(公告)日：2006-02-21

申请号：BRPI0407593

申请日：2004-12-17

Applicant: MOTOROLA INC

Inventor： JASIUK MARK A ,  RAMABADRAN TENKASI V ,  MITTAL UDAR ,  ASHLEY JAMES P ,  MCLAUGHLIN MICHAEL J

IPC: G10L19/08 ,  G10L25/90 ,  G10L11/04 ,  G10L19/00 ,  G10L19/12 ,  G10L19/10 ,  G10L19/04

Abstract: A method and apparatus for prediction in a speech-coding system extends a 1st order long-term predictor (LTP) filter, using a sub-sample resolution delay, to a multi-tap LTP filter. From another perspective, a conventional integer-sample resolution multi-tap LTP filter is extended to use sub-sample resolution delay. Such a multi-tap LTP filter offers a number of advantages over the prior-art. Particularly, defining the lag with sub-sample resolution makes it possible to explicitly model the delay values that have a fractional component, within the limits of resolution of the over-sampling factor used by the interpolation filter. The coefficients (betai's) of the multi-tap LTP filter are thus largely freed from modeling the effect of delays that have a fractional component. Consequently their main function is to maximize the prediction gain of the LTP filter via modeling the degree of periodicity that is present and by imposing spectral shaping.

公开(公告)号：CA1209210A

公开(公告)日：1986-08-05

申请号：CA433685

申请日：1983-08-02

Applicant: MOTOROLA INC

Inventor： MCLAUGHLIN MICHAEL J

IPC: H04B17/00 ,  H04B20060101 ,  H04B7/08 ,  H04B7/26

Abstract: An improved method and apparatus for measuring the strength of a radio frequency (RF) signal (Fig. 3) subject to Rayleigh fading is described. The strength of the RF signal is sampled two or more times during a predetermined time interval and the sampled signal strength having the largest magnitude is selected (Fig. 4). The selected signal strength is a reasonably accurate measure of the signal strength since the true average strength of a Rayleigh fading signal is close to its peak signal strength. The inventive method and apparatus is particularly well adapted for use in a scanning receiver (Fig. 2) located in a base station radio (111, 121, 131) of a cellular radiotelephone communications system (Fig. 1). The scanning receiver (Fig. 2) includes an antenna selector (102) for selecting one of a plurality of sector antennas, an RF signal receiver (104) tunable to a plurality of different RF signal frequencies, an analog-to-digital converter (106) for converting RF signal strength samples to a binary data signal, and a microprocessor (114) together with peripheral devices (108, 110) for controlling the operation of the antenna selector (102), RF signal receiver (104) and analog-to-digital converter (106).

公开(公告)号：EP1697925A4

公开(公告)日：2009-07-08

申请号：EP04814785

申请日：2004-12-17

Applicant: MOTOROLA INC

Inventor： JASIUK MARK A ,  RAMABADRAN TENKASI V ,  MITTAL UDAR ,  ASHLEY JAMES P ,  MCLAUGHLIN MICHAEL J

IPC: G10L11/04 ,  G10L19/00 ,  G10L19/04 ,  G10L19/08 ,  G10L19/10 ,  G10L19/12

CPC classification number: G10L19/09

Abstract: A method (Fig. 9) and apparatus (500, 600) for prediction in a speech-coding system extends a 1st order long-term predictor (LTP) filter, using a sub-sample resolution delay, to a multi-tap LTP filter (504, 604). From another perspective, a conventional integer-sample resolution multi-tap LTP filter is extended to use sub-sample resolution delay. Such a multi-tap LTP filter offers a number of advantages over the prior-art. Particularly, defining the lag with sub-sample resolution makes it possible to explicitly model the delay values that have a fractional component, within the limits of resolution of the over-sampling factor used by the interpolation filter. The coefficients (ßi's) of the multi-tap LTP filter are thus largely freed from modeling the effect of delays that have a fractional component. Consequently their main function is to maximize the prediction gain of the LTP filter via modeling the degree of periodicity that is present and by imposing spectral shaping.