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1. 发明授权

US5592558A Sound reproduction device 失效
标题翻译：声音再现设备
公开(公告)号：US5592558A
公开(公告)日：1997-01-07
申请号：US528728
申请日：1995-09-15
申请人： Friedbert Stuhlfelner , Harri Valio
发明人： Friedbert Stuhlfelner , Harri Valio
IPC分类号： H04R5/04 , H04R3/00 , H04S1/00 , H04S5/02 , H04S7/00 , H04R5/00 , H03G3/00
CPC分类号： H04S5/02
摘要： The invention introduces an arrangement which maintains the usefulness of a fader control (11) connected for example to an audio signal source (10), and at the same time considerably reduces the circuit cost. This is realized in that the distribution to different listening areas adjusted by the fader control (11) is determined from the audio signals that are present behind the fader control (11). To that end, first the audio output signals (L, R) are reconstructed in two adders (12.2, 12.3) and routed to a fourth adder (12.4). Two each audio signals (L.sub.V, R.sub.V) are routed to a first adder (12.1). The signals existing behind the adders (12.1/4) are then placed into a ratio with each other by a divider (20). From the quotient Q determined there, the distribution rate is then determined by a calculator (21) and made available to the multipliers (M1-4). Devices (17) to determine the average level value, followed by smoothing devices (18), which are positioned symmetrically with respect to the adders (12.1/4).
摘要翻译：本发明引入了一种保持例如连接到音频信号源（10）的推子控制（11）的有用性的装置，并且同时显着地降低了电路成本。这是通过由推子控制（11）调节的不同收听区域的分布由推子控制（11）之后的音频信号确定的。为此，首先，音频输出信号（L，R）在两个加法器（12.2,12.3）中重构，并被路由到第四加法器（12.4）。两个每个音频信号（LV，RV）被路由到第一加法器（12.1）。然后，存在于加法器（12.1 / 4）后面的信号通过分频器（20）彼此成比例。从这里确定的商Q，然后由计算器（21）确定分配率，并使其可用于乘法器（M1-4）。用于确定平均水平值的装置（17），其后是相对于加法器（12.1 / 4）对称定位的平滑装置（18）。

2. 发明授权

US6005953A Circuit arrangement for improving the signal-to-noise ratio 失效
标题翻译：电路布置，用于提高信噪比
公开(公告)号：US6005953A
公开(公告)日：1999-12-21
申请号：US766855
申请日：1996-12-13
申请人： Friedbert Stuhlfelner
发明人： Friedbert Stuhlfelner
IPC分类号： H03G3/00 , H03G3/20 , H03G5/00 , H04B1/10 , H04R3/00 , H04B15/00
CPC分类号： H03G3/301 , H03G3/002 , H03G5/005 , H03G9/005 , H04R3/007 , H04B1/1027
摘要： In a new circuit arrangement for improving the signal-to-noise ratio, the entire audible frequency spectrum is divided into several abutting frequency channels. Each channel supplies the respective signal part in delayed form to an amplifier with controllable amplification. The amplifier's amplification is adjusted as a function of a comparator, so that when the audio frequency signal is below a threshold value during a specified time, the amplification of the controllable amplifier is gradually decreased to the lowest amplification value. Vice versa, when the useful signal again exceeds the threshold value, the amplification is gradually controlled upward to a maximum value.
摘要翻译：在用于提高信噪比的新电路装置中，整个可听频谱被分成几个邻接的频率信道。每个通道将具有延迟形式的相应信号部分提供给具有可控放大的放大器。放大器的放大作为比较器的函数进行调整，使得当音频信号在指定时间内低于阈值时，可控放大器的放大率逐渐降低到最低的放大值。反之亦然，当有用信号再次超过阈值时，放大逐渐被控制到最大值。

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