-
公开(公告)号：US07133468B2
公开(公告)日：2006-11-07
申请号：US10272890
申请日：2002-10-17
CPC分类号： H03H17/0261 , H04B1/1646
摘要： A method and apparatus are provided which detects distortion in a received FM signal caused by amplitude modulating and phase transition of two combined FM signals. A method corrects and modifies the distortion by detecting a distorted sample, replacing the distorted sample with an appropriate sample, and applying a smoothing process to the sample.
摘要翻译： 提供一种检测由两个组合FM信号的幅度调制和相位转变引起的接收的FM信号中的失真的方法和装置。 一种方法通过检测失真的样品来校正和修改失真，用适当的样品代替失真的样品，并对样品进行平滑处理。
-
公开(公告)号：US07492909B2
公开(公告)日：2009-02-17
申请号：US09826503
申请日：2001-04-05
IPC分类号： H04R29/00
CPC分类号： H04R29/001 , H04R29/004 , H04R2499/11
摘要： A method of acoustic transducer calibration (200, 400) using a band limited pseudo random noise source with an internal digital signal processor (209, 403) to tailor audio characteristics of an internal microphone 103 and internal speaker (301) within a communications device (101) to insure consistent amplitude and frequency characteristics of these microphone and speaker transducer devices. The method offers and advantage such that tuning of the amplitude and frequency response consistently converges to the desired filter response with a filter type offering operational stability.
-
公开(公告)号：US07085390B2
公开(公告)日：2006-08-01
申请号：US09849320
申请日：2001-05-04
CPC分类号： H04R3/00
摘要： A method for controlling audio gain balance in a multi-mode communications device (200) includes providing (201) microphone audio input to the multimode communications device. The audio is supplied to an amplifier gain stage while a dynamic instantaneous energy value of the audio input is computed (203) when in a first operational mode such as an analog mode. A predetermined gain algorithm is processed (207) representing an audio input when in a second mode such as a digital mode using the energy value. The audio gain stage in the multi-mode communications device is then adjusted (209) so that audio gain when in the first mode substantially approximates an audio gain when in an second mode. This provides a consistent audio amplitude output when receiving the first and second modes in a radio receiver.
摘要翻译： 一种用于在多模式通信设备（200）中控制音频增益平衡的方法包括向多模通信设备提供（201）麦克风音频输入。 当处于诸如模拟模式的第一操作模式时，将音频提供给放大器增益级，同时计算音频输入的动态瞬时能量值（203）。 在使用能量值的诸如数字模式的第二模式中，处理表示音频输入的预定增益算法（207）。 然后调整多模式通信设备中的音频增益级（209），使得当处于第二模式时，在第一模式中的音频增益基本上接近音频增益。 当在无线电接收机中接收第一和第二模式时，这提供一致的音频幅度输出。
-
-
搜索结果
3 条记录 (耗时 0.015 秒)
