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1. 发明授权

US4504870A Automatic level adjustment with means for minimizing drop-out effects 失效
标题翻译：自动电平调节，具有最大限度地减少掉落效应的手段
公开(公告)号：US4504870A
公开(公告)日：1985-03-12
申请号：US399571
申请日：1982-07-19
申请人： Masatsugu Kitamura , Mamoru Inami , Yoshiaki Tanaka , Zenju Otsuki
发明人： Masatsugu Kitamura , Mamoru Inami , Yoshiaki Tanaka , Zenju Otsuki
IPC分类号： G11B5/027 , G11B20/02 , G11B20/04 , G11B20/18 , G11B15/02 , G11B27/36
CPC分类号： G11B20/182 , G11B20/025 , G11B20/04
摘要： A test signal is recorded on a magnetic tape prior to the recording of audio signals and reproduced to allow detection of an average value of the magnitude of the reproduced test signal. A drop-out in the reproduced signal is detected if it occurs during the process of deriving the average value. If the drop-out is not detected, a difference between the average value and a reference value is detected to adjust the signal level of the recorded test signal so that the difference reduces substantially to zero. If a drop-out is detected the average value is renewed by repeating the process of recording and reproducing the test signal.
摘要翻译：在记录音频信号之前将测试信号记录在磁带上，并被再现以允许检测再现的测试信号的幅度的平均值。如果在导出平均值的过程中发生了再现信号的丢失。如果没有检测到丢失，则检测平均值和参考值之间的差异，以调整所记录的测试信号的信号电平，使得该差大大减小到零。如果检测到辍学，则通过重复记录和再现测试信号的处理来更新平均值。

2. 发明授权

US4665494A Spectrum display device for audio signals 失效
标题翻译：频谱显示设备用于音频信号
公开(公告)号：US4665494A
公开(公告)日：1987-05-12
申请号：US562183
申请日：1983-12-16
申请人： Yoshiaki Tanaka , Mamoru Inami , Zenju Otsuki
发明人： Yoshiaki Tanaka , Mamoru Inami , Zenju Otsuki
IPC分类号： G01H3/08 , G01R13/40 , G01R23/18 , G01R23/16
CPC分类号： G01H3/08 , G01R13/405 , G01R23/18
摘要： An input audio signal is AD converted into digital signals which are processed by a central processing unit (CPU) in which Fast Fourier Transform (FFT) operation and power spectrum calculation are effected. As a result power spectrum data is obtained, and then position determination is effected to determine the position of each bar of a bar graph to be displayed on a display unit screen, according to the power level at different frequencies within the spectrum of the audio signal. Pattern data is then produced in correspondence with the determined position, and output data from the CPU is fed via a video display processor to a video RAM, thereby displaying the spectrum by way of a predetermined pattern of a bar graph on the screen. In order to reduce the number of digital data used in FFT operation the input audio signal may be divided into a plurality of different frequency bands so that different sampling frequencies are used for AD conversion of signals of respective bands. As a result, operating time is reduced. To further reduce the operating time the CPU may be arranged to execute parallel operations in various manners. Furthermore, two or more CPUs may be employed to further increase the operating speed.
摘要翻译：输入音频信号被AD转换成由执行快速傅里叶变换（FFT）操作和功率谱计算的中央处理单元（CPU）处理的数字信号。结果，获得功率谱数据，然后进行位置确定，以根据音频信号的频谱内的不同频率处的功率电平来确定要显示在显示单元屏幕上的条形图的每个条的位置。然后根据确定的位置产生图形数据，并且来自CPU的输出数据经由视频显示处理器馈送到视频RAM，从而通过屏幕上的条形图的预定图案显示频谱。为了减少在FFT操作中使用的数字数据的数量，输入音频信号可以被划分为多个不同的频带，使得不同的采样频率被用于各个频带的信号的AD转换。结果，操作时间缩短。为了进一步减少CPU可以以各种方式来执行并行操作的操作时间。此外，可以采用两个或更多个CPU来进一步提高操作速度。

3. 发明授权

US4546690A Apparatus for displaying musical notes indicative of pitch and time value 失效
标题翻译：用于显示指示音调和时间值的音符的装置
公开(公告)号：US4546690A
公开(公告)日：1985-10-15
申请号：US605672
申请日：1984-04-27
申请人： Yoshiaki Tanaka , Mamoru Inami , Zenju Otsuki
发明人： Yoshiaki Tanaka , Mamoru Inami , Zenju Otsuki
IPC分类号： G10G3/04 , G09B15/02 , G04F5/02
CPC分类号： G10G3/04
摘要： An input audio signal is analog-to-digital (AD) converted into digital data which is processed by a central processing unit (CPU) for determining pitch of each sound by effecting Fast Fourier Transform (FET) operation and power spectrum calculation. The determination of the sound pitch is effected twice in sequence, and by using frequency and level data resulted from two consecutive determinations, the time length of the sound is detected. After the pitch and the time length are determined, data indicative of a given musical note pattern is produced so that a musical note indicative of time value is indicated at an appropriate position on a staff displayed on a screen of a display unit. Such data from the CPU is fed via a video display processor to a video RAM to be stored therein where the video display processor produces a video signal fed to the display unit in turn. In one embodiment, a note indicative of only sound pitch is displayed immediately after the pitch is determined, and the pattern of the note is changed to indicate time value if the sound is detected as a continuous sound. In another embodiment, the relationship between the time value of a note and actual time length can be manually set so that desired tempo can be selected. Furthermore, rhythm sounds corresponding to a selected tempo may be emitted, while data indicative of the selected tempo may be displayed.
摘要翻译：输入音频信号被转换为数字数据，由中央处理单元（CPU）处理，用于通过进行快速傅里叶变换（FET）操作和功率谱计算来确定每个声音的音高。声音的确定依次进行两次，并且通过使用由两次连续确定得到的频率和电平数据，检测声音的时间长度。在确定音调和时间长度之后，产生指示给定音符模式的数据，使得在显示在显示单元的屏幕上的工作人员的适当位置处指示时间值的音符。来自CPU的这些数据经由视频显示处理器被馈送到视频RAM以存储在其中，其中视频显示处理器依次产生馈送到显示单元的视频信号。在一个实施例中，在确定音调之后立即显示仅指示音调的音符，并且如果声音被检测为连续声音，则音符的模式被改变以指示时间值。在另一个实施例中，可以手动设置音符的时间值与实际时间长度之间的关系，以便可以选择所需的速度。此外，可以发出对应于所选择的节奏的节奏声音，而可以显示指示所选择的节奏的数据。

4. 发明授权

US4559569A Circuit arrangement for correcting frequency response in accordance with frequency response of a sound field 失效
标题翻译：根据声场的频率响应来校正频率响应的电路布置
公开(公告)号：US4559569A
公开(公告)日：1985-12-17
申请号：US587485
申请日：1984-03-08
申请人： Zenju Otsuki , Mamoru Inami
发明人： Zenju Otsuki , Mamoru Inami
IPC分类号： H03G5/16 , H04R29/00 , H04S7/00 , G11B5/02
CPC分类号： H04S7/30 , H03G5/165 , H04R29/00 , H04R29/001
摘要： In a circuit arrangement for automatically correcting frequency response so as to set a desired frequency response in view of a frequency response of a sound field, a frequency response control circuit is improved such that precise level control at a number of bands is effected with a simple structure. A microcomputer is used to determine the difference between a desired frequency response curve and a frequency response curve obtained by measuring the sound pressure level in a sound field, to which pink noise or the like is emitted through the frequency response control circuit, so as to produce a control signal used in the frequency response control circuit to give a desired frequency response to an audio signal. The frequency response control circuit comprises an amplifier, a plurality of resonance circuits corresponding to the bands, a plurality of variable resistor circuits each including a parallel circuit of a plurality of series circuits of a resistor and an analog switch; and an interface circuit responsive to serial data of the control signal from the microcomputer for controlling the analog switches.
摘要翻译：在用于自动校正频率响应以便根据声场的频率响应来设置期望的频率响应的电路装置中，频率响应控制电路被改进，使得在多个频带上的精确电平控制以简单的结构体。使用微型计算机来确定期望的频率响应曲线和通过测量通过频率响应控制电路发出粉红噪声等的声场中的声压级获得的频率响应曲线之间的差异，以便产生在频率响应控制电路中使用的控制信号，以对音频信号给出期望的频率响应。频率响应控制电路包括放大器，对应于频带的多个谐振电路，多个可变电阻电路，每个可变电阻电路包括电阻器和模拟开关的多个串联电路的并联电路; 以及响应来自微型计算机的控制信号的串行数据的接口电路，用于控制模拟开关。

5. 发明授权

US4510840A Musical note display device 失效
标题翻译：音乐显示装置
公开(公告)号：US4510840A
公开(公告)日：1985-04-16
申请号：US567175
申请日：1983-12-30
申请人： Mamoru Inami , Yoshiaki Tanaka , Zenju Otsuki
发明人： Mamoru Inami , Yoshiaki Tanaka , Zenju Otsuki
IPC分类号： G10H1/00 , G10L25/90 , G10G1/00 , G01R23/16 , G09B15/02
CPC分类号： G10H1/0008 , G10L25/90 , G10H2210/066 , G10H2210/086 , G10H2220/015 , G10H2250/235
摘要： An input audio signal is AD converted into digital data which is processed by a central processing unit (CPU) in which Fast Fourier Transform (FFT) operation and power spectrum calculation are effected. Furthermore, spectrum data obtained in this way is processed to obtain a fundamental tone to determine the pitch of each sound of the input audio signal. After the pitch is determined, data indicative of a given pattern is produced so that a musical note is indicated at an appropriate position on a staff displayed on a screen of a display unit. Such data from the CPU is fed via a video display processor to a video RAM to be stored therein where the video display processor produces a video signal fed to the display unit in turn. Since the fundamental tone does not necessarily have the highest level within the spectrum of the input audio signal, various ways for accurate determination of the pitch are used. Furthermore, a reference pitch preset in the musical note display device may be changed so as to be equal to a reference pitch emitted from a musical instrument or the like by changing sampling frequency of sampling pulses fed to an AD converter.
摘要翻译：输入音频信号被AD转换为数字数据，该数字数据由执行快速傅里叶变换（FFT）运算和功率谱计算的中央处理单元（CPU）进行处理。此外，以这种方式获得的频谱数据被处理以获得基本色调，以确定输入音频信号的每个声音的音调。在确定音调之后，产生指示给定图案的数据，使得在显示在显示单元的屏幕上的工作人员的适当位置上指示音符。来自CPU的这些数据经由视频显示处理器被馈送到视频RAM以存储在其中，其中视频显示处理器依次产生馈送到显示单元的视频信号。由于基本音调不一定在输入音频信号的频谱内具有最高级别，所以使用用于精确确定音调的各种方式。此外，可以通过改变馈送到AD转换器的采样脉冲的采样频率来改变音乐显示装置中预设的参考音高以使其等于从乐器等发出的参考音高。

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