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1. 发明授权

US4187477A Noise reduction system 失效
标题翻译：降噪系统
公开(公告)号：US4187477A
公开(公告)日：1980-02-05
申请号：US844435
申请日：1977-10-21
申请人： Kenjiro Endoh , Motokazu Ohkawa , Kazuo Kitagawa , Hideshi Kira
发明人： Kenjiro Endoh , Motokazu Ohkawa , Kazuo Kitagawa , Hideshi Kira
IPC分类号： H04B1/62 , G11B20/04 , H03G7/00 , H03G9/02 , H04B1/64
CPC分类号： H03G9/025
摘要： A noise reduction system including an encoder for compressing the dynamic range of an audio input signal in accordance with the amplitude thereof, a transmission medium coupled to the encoder, and a decoder having a transfer function inverse to that of the decoder. The encoder includes a first controlled amplifier circuit in which, when the input audio signal is in low- and middle- levels, sufficient emphasis is made to the signal at high frequencies, and when it is in high-level, the emphasis quantity at high frequencies is restrictive. The decoder includes a voltage-current converting circuit for converting voltage of the reproduced audio signal into current and a second controlled amplifier circuit amplifying the converted current and having a transfer function inverse to that of the first controlled amplifier circuit. The second controlled amplifier includes a variable response amplifier having a capacitor and a resistor in series circuit between the output of the voltage-current converting circuit and the output terminal of the second voltage controlled amplifier, a variable gain current amplifier connected at the input thereof to the output of the voltage-current converting circuit and the series circuit, and means for converting the output current of the variable gain current amplifier into a voltage to be directed to the decoder output terminal.
摘要翻译：一种降噪系统，包括用于根据其幅度压缩音频输入信号的动态范围的编码器，耦合到编码器的传输介质和具有与解码器的传递函数相反的传递函数的解码器。编码器包括第一受控放大器电路，其中当输入音频信号处于低电平和中等电平时，对高频信号充分强调，当处于高电平时，高电平处的强调量频率是限制性的。解码器包括用于将再现的音频信号的电压转换成电流的电压 - 电流转换电路和放大转换后的电流并具有与第一受控放大器电路相反的传递函数的第二受控放大器电路。第二受控放大器包括具有电容器的可变响应放大器和在电压 - 电流转换电路的输出与第二压控放大器的输出端之间的串联电路中的电阻器，连接在其输入端的可变增益电流放大器电压电流转换电路和串联电路的输出，以及用于将可变增益电流放大器的输出电流转换为指向解码器输出端子的电压的装置。

2. 发明授权

US4224581A Compander system having limiter in compressor and expander 失效
标题翻译：压缩机系统在压缩机和膨胀机中具有限制器
公开(公告)号：US4224581A
公开(公告)日：1980-09-23
申请号：US844198
申请日：1977-10-21
申请人： Hiroshi Watanabe , Kenjiro Endoh , Motokazu Ohkawa , Kazuo Kitagawa , Hideshi Kira
发明人： Hiroshi Watanabe , Kenjiro Endoh , Motokazu Ohkawa , Kazuo Kitagawa , Hideshi Kira
IPC分类号： H03G9/02 , H04B1/64 , H03G7/00
CPC分类号： H03G9/025
摘要： A noise reduction system having an encoder which compresses the dynamic range of an analog audio signal, a transmission medium coupled to the encoder, and a decoder coupled to the transmission medium for expanding and thereby restoring the dynamic range of the compressed analog audio signal. The encoder includes a voltage controlled amplifier (VCA) receiving the audio signal, a high-pass filter also coupled to the analog audio signal, a circuit for obtaining a difference between the outputs of the VCA and the high-pass filter, weighting and level sensing circuits coupled to the encoder output for sensing the level of the compressed analog audio signal, and a limiter circuit coupled to the output of the weighting and level sensing circuits and producing a control voltage applied to the VCA control input in such a manner that the ratio of the gain of the VCA and the gain of the high-pass filter at the pass band thereof does not become less than one. The decoder includes circuits similar to those of the encoder and exhibits a transfer function substantially inverse to the encoder transfer function, with the controlling voltage applied to the decoder VCA such that the loop gain in the pass band of the high-pass filter does not become more than one.
摘要翻译：一种噪声降低系统，具有压缩模拟音频信号的动态范围的编码器，耦合到编码器的传输介质和耦合到传输介质的解码器，用于扩展并由此恢复压缩的模拟音频信号的动态范围。编码器包括接收音频信号的压控放大器（VCA），还耦合到模拟音频信号的高通滤波器，用于获得VCA和高通滤波器的输出之间的差值的电路，加权和电平耦合到编码器输出的感测电路用于感测压缩的模拟音频信号的电平;以及限制器电路，耦合到加权和电平感测电路的输出，并产生施加到VCA控制输入的控制电压， VCA的增益比和通带的高通滤波器的增益的比率不会变得小于1。解码器包括与编码器类似的电路，并且具有与编码器传递函数基本相反的传递函数，其中控制电压施加到解码器VCA，使得高通滤波器的通带中的环路增益不会变为超过一个。

3. 发明授权

US4187478A Noise reduction system having specific encoder circuitry 失效
标题翻译：具有特定编码器电路的降噪系统
公开(公告)号：US4187478A
公开(公告)日：1980-02-05
申请号：US844436
申请日：1977-10-21
申请人： Kenjiro Endoh , Motokazu Ohkawa , Kazuo Kitagawa , Hideshi Kira
发明人： Kenjiro Endoh , Motokazu Ohkawa , Kazuo Kitagawa , Hideshi Kira
IPC分类号： H04B1/62 , G11B20/04 , H03G7/00 , H03G9/02 , H04B1/64
CPC分类号： H03G9/025
摘要： A noise reduction system is provided with an encoder for compressing the dynamic range of an audio input signal in accordance with the amplitude of the input signal and recording the compressed one into a tape-recorder, and a decoder for expanding the dynamic range of a reproduced audio signal from the tape-recorder to the original one in accordance with the amplitude of the reproduced audio signal. The encoder includes a first controlled amplifier circuit in which, when the input audio signal is low- and middle-levels, sufficient emphasis is made to the signal at high-frequencies, and when it is in high-level, the emphasis quantity at high-frequencies is restrictive. The decoder includes a second controlled amplifier circuit having a transfer function related to the character of the first controlled amplifier circuit substantially in inverse-function manner. The first controlled amplifier includes a variable response amplifier having a first resistor connected at one end to an input terminal, a current amplifier with variable gain amplifying current extracted from the other end of the first resistor, a series circuit having a second resistor and a capacitor and connected at one end to the input terminal, and means for adding an output current of the other end of the series circuit with an output current of the current amplifier and means for converting the summed current into voltage directed to an output terminal.
摘要翻译：噪声降低系统具有：编码器，用于根据输入信号的幅度压缩音频输入信号的动态范围，并将压缩的信号记录到录音机中;解码器，用于扩展再现的动态范围根据再现的音频信号的幅度从音频记录器到原始音频信号的音频信号。编码器包括第一受控放大器电路，其中当输入音频信号为低电平和中等电平时，对高频信号进行充分的重视，并且当处于高电平时，高电平处的强调量 - 频率是限制性的。解码器包括具有与第一受控放大器电路的特性相关的传递函数的第二受控放大器电路，其基本上是反向功能的。第一受控放大器包括一个可变响应放大器，该可变响应放大器的一端连接到一个输入端;一个电流放大器，具有从第一个电阻的另一端提取的可变增益放大电流，串联电路具有一个第二电阻和一个电容并且其一端连接到输入端子，以及用于将串联电路的另一端的输出电流与电流放大器的输出电流相加的装置和用于将求和的电流转换成指向输出端子的电压的装置。

4. 发明授权

US4162462A Noise reduction system 失效
标题翻译：降噪系统
公开(公告)号：US4162462A
公开(公告)日：1979-07-24
申请号：US799337
申请日：1977-05-23
申请人： Kenjiro Endoh , Kazuo Kitagawa , Hideshi Kira
发明人： Kenjiro Endoh , Kazuo Kitagawa , Hideshi Kira
IPC分类号： H04B1/62 , G11B20/04 , H03G9/02 , H04B1/64
CPC分类号： H04B1/64 , H03G9/025
摘要： A noise reduction system is provided with an encoder for compressing the dynamic range of an audio input signal in accordance with the amplitude of the input signal and recording the compressed one into a tape recorder, and a decoder for expanding the dynamic range of a reproduced audio signal from the tape recorder to the original one in accordance with the amplitude of the reproduced audio signal. The encoder includes a first controlled amplifier circuit in which, when the input audio signal is in low- and middle-levels, sufficient emphasis is made to the signal at high frequencies, and when it is in high-level, the emphasis quantity at high frequencies is restrictive. The decoder includes a second controlled amplifier circuit having a transfer function related to the character of the first controlled amplifier circuit substantially in inverse-function manner.
摘要翻译：降噪系统具有编码器，用于根据输入信号的幅度压缩音频输入信号的动态范围，并将压缩的信号记录到磁带录音机中;解码器，用于扩展再生音频的动态范围根据再现的音频信号的幅度从磁带录音机向原始录音机发送信号。编码器包括第一受控放大器电路，其中当输入音频信号处于低电平和中等电平时，对高频信号充分强调，当处于高电平时，高电平处的强调量频率是限制性的。解码器包括具有与第一受控放大器电路的特性相关的传递函数的第二受控放大器电路，其基本上是反向功能的。

5. 发明授权

US4496937A Sampled signal generation circuit 失效
标题翻译：采样信号发生电路
公开(公告)号：US4496937A
公开(公告)日：1985-01-29
申请号：US485135
申请日：1983-04-20
申请人： Kazuo Kitagawa , Kenjiro Endoh , Hideshi Kira
发明人： Kazuo Kitagawa , Kenjiro Endoh , Hideshi Kira
IPC分类号： G11C27/02 , H03M1/00 , H03K13/02
CPC分类号： G11C27/02 , H03M1/124 , H03M1/48
摘要： A sampled data generation circuit includes a voltage controlled oscillator for producing an output signal with a frequency variable according to a control voltage, a sample and hold circuit for sampling and holding an analog input signal in response to the output signal from the voltage controlled oscillator, and a control circuit for detecting the difference between two successive sampled data generated from the sample and hold circuit and supplying the voltage controlled oscillator with an output signal corresponding to the difference as the control voltage, thereby controlling the voltage controlled oscillator so that the greater the difference, the higher the frequency of the output signal from the voltage controlled oscillator is.
摘要翻译：采样数据生成电路包括用于根据控制电压产生具有频率变化的输出信号的压控振荡器，用于响应于来自压控振荡器的输出信号采样和保持模拟输入信号的采样和保持电路，以及控制电路，用于检测从采样和保持电路产生的两个连续采样数据之间的差异，并向压控振荡器提供对应于该差值的输出信号作为控制电压，从而控制压控振荡器，差分，来自压控振荡器的输出信号的频率越高。

6. 发明授权

US06556679B1 Copy-guard system and information recording medium used in the same system 失效
标题翻译：复制保护系统和信息记录介质在同一系统中使用
公开(公告)号：US06556679B1
公开(公告)日：2003-04-29
申请号：US09195914
申请日：1998-11-19
申请人： Takehisa Kato , Taku Katoh , Kenjiro Endoh , Hisashi Yamada , Naoki Endoh
发明人： Takehisa Kato , Taku Katoh , Kenjiro Endoh , Hisashi Yamada , Naoki Endoh
IPC分类号： H04N7167
CPC分类号： G11B20/0021 , G11B20/00086 , G11B20/00166 , G11B20/18 , H04N5/913 , H04N5/945 , H04N2005/91328 , H04N2005/91364
摘要： In an embodiment, a copy-guard system is provided that includes a decoding section for decoding digital data, which is encoded and error-correction-coded, from an information recording medium in which key information encoded for the digital data is recorded, an encoded digital data acquisition section for acquiring digital data encoded by error-correcting the digital data decoded by the decoding section, a detection section for detecting an error position and an error symbol value of the encoded digital data, identification information detection section for detecting an identification information representing whether the information recording medium is original or copied and which is replaced with a part of the digital data encoded and error-correction-coded, based on the error position and the error symbol value detected by the detection section, a determination section for determining whether a copy of the information recording medium is protected, and a copy protection section.
摘要翻译：在一个实施例中，提供了一种复制保护系统，其包括：解码部分，用于从其中记录用于数字数据编码的密钥信息的信息记录介质对由数字数据进行编码和纠错编码的数字数据进行解码，数字数据获取部分，用于获取通过对由解码部分解码的数字数据进行纠错编码的数字数据，检测部分，用于检测编码数字数据的错误位置和误差符号值;识别信息检测部分，用于检测识别信息表示信息记录介质是原始还是复制的，并且基于由检测部分检测的错误位置和错误符号值，被编码和纠错编码的数字数据的一部分替代，确定部分，用于确定信息记录介质的副本是否被保护，以及复制保护部分。

7. 发明授权

US06438692B1 Copy protection apparatus and information recording medium used in this copy protection apparatus 有权
公开(公告)号：US06438692B1
公开(公告)日：2002-08-20
申请号：US09934762
申请日：2001-08-23
申请人： Taku Kato , Takehisa Kato , Kenjiro Endoh , Hisashi Yamada , Naoki Endoh
发明人： Taku Kato , Takehisa Kato , Kenjiro Endoh , Hisashi Yamada , Naoki Endoh
IPC分类号： H04L932
摘要： This invention protects the unauthorized copy of multimedia data, recorded on an information recording medium, by using electronic watermark information and key information. The electronic watermark information embedded in the multimedia data is extracted by an electronic watermark extraction unit on the decryption system side. A disk key is obtained using the electronic watermark information and a part master key. The multimedia data is decrypted using the resultant disk key.

8. 发明授权

US5999695A Multilingual recording medium and reproduction apparatus 失效
标题翻译：多语言记录介质和再现设备
公开(公告)号：US5999695A
公开(公告)日：1999-12-07
申请号：US86476
申请日：1998-05-28
申请人： Koichi Hirayama , Masatoshi Nakai , Yuichi Miyano , Kenjiro Endoh
发明人： Koichi Hirayama , Masatoshi Nakai , Yuichi Miyano , Kenjiro Endoh
IPC分类号： G10H1/36 , G11B19/02 , G11B20/12 , G11B27/10 , G11B27/32 , G11B27/34 , H04N5/775 , H04N5/85 , H04N5/945 , H04N9/804 , H04N9/806 , H04N9/82 , H04N9/888 , H04N5/91 , H04N5/928
CPC分类号： H04N9/8233 , G10H1/361 , G10H1/363 , G11B19/02 , G11B20/1251 , G11B27/105 , G11B27/329 , G11B27/34 , H04N5/775 , H04N9/8042 , H04N9/8063 , H04N9/8216 , H04N9/8227 , H04N9/8244 , G10H2240/036 , G11B2220/2562 , H04N5/85 , H04N5/945 , H04N9/888
摘要： A reproduction apparatus is designed to select and decode speech and subtitles (characters) in a given language from a disk on which various types of information are recorded in different languages. This system arrangement makes it possible to standardize the manufacture of disks and reproduction apparatuses world wide, resulting in a reduction in production cost. In a disk 100, various types of information are recorded in different languages along with video information. A reproduction apparatus selects information in a given language from the reproduced information using a data string processing section 203, a system control section 204, and an operator section 205, and supplies the selected pieces of information to each of a video processing section 206, a subtitle decoder 211, and an audio processing section 213.
摘要翻译：再现装置被设计成从以不同语言记录各种类型的信息的盘中选择和解码给定语言的语音和字幕（字符）。该系统布置使得可以使世界范围内的盘和再现装置的制造标准化，从而降低生产成本。在盘100中，各种类型的信息与视频信息一起被记录在不同的语言中。再现装置使用数据串处理部分203，系统控制部分204和操作部分205从再现的信息中选择给定语言的信息，并将所选择的信息提供给视频处理部分206，字幕解码器211和音频处理部分213。

9. 发明授权

US5652824A Multilingual recording medium and reproducing apparatus with automatic selection of substitutes and languages based on frequency of selections 失效
标题翻译：多种语言的记录介质和再现设备，可根据选择频率自动选择替代品和语言
公开(公告)号：US5652824A
公开(公告)日：1997-07-29
申请号：US464876
申请日：1995-06-28
申请人： Koichi Hirayama , Masatoshi Nakai , Yuichi Miyano , Kenjiro Endoh
发明人： Koichi Hirayama , Masatoshi Nakai , Yuichi Miyano , Kenjiro Endoh
IPC分类号： G09B5/06 , G10H1/36 , G11B19/02 , G11B20/02 , G11B20/10 , G11B20/12 , G11B27/10 , G11B27/11 , G11B27/32 , G11B27/34 , G11B27/36 , G11B33/10 , H04N5/775 , H04N5/781 , H04N5/85 , H04N5/91 , H04N5/92 , H04N5/928 , H04N5/93 , H04N5/945 , H04N7/04 , H04N7/06 , H04N9/804 , H04N9/806 , H04N9/82 , H04N21/485
CPC分类号： G11B19/022 , G09B5/065 , G10H1/361 , G10H1/363 , G11B19/02 , G11B20/1217 , G11B20/1252 , G11B20/1254 , G11B27/105 , G11B27/11 , G11B27/329 , G11B27/34 , G11B27/36 , G11B33/10 , H04N5/9208 , H04N5/93 , H04N9/8042 , H04N9/8063 , H04N9/8227 , H04N9/8233 , G10H2240/036 , G11B2020/10592 , G11B2220/2562 , G11B2220/65 , H04N21/4856 , H04N5/775 , H04N5/85 , H04N5/945 , H04N9/8244
摘要： A reproduction apparatus is designed to select and decode speech and subtitles (characters) in a given language from a disk on which various types of information are recorded in different languages. This system arrangement makes it possible to standardize the manufacture of disks and reproduction apparatuses world-wide, resulting in a reduction in production cost. In a disk 100, various types of information are recorded in different languages along with video information. A reproduction apparatus selects information in a given language from the reproduced information using a data string processing section 203, a system control section 204, and an operator section 205, and supplies the selected pieces of information to each of a video processing section 206, a subtitle decoder 211, and an audio processing section 213.
摘要翻译： PCT No.PCT / JP93 / 01571 Sec。 371日期：1995年6月28日 102（e）日期1995年6月28日PCT提交1993年10月29日PCT公布。公开号WO95 / 12198 日期1995年5月4日一种再现设备被设计为从以不同语言记录各种类型的信息的盘中选择和解码给定语言的语音和字幕（字符）。该系统结构使得可以使世界各地的盘和再现装置的制造标准化，从而降低了生产成本。在盘100中，各种类型的信息与视频信息一起被记录在不同的语言中。再现装置使用数据串处理部分203，系统控制部分204和操作部分205从再现的信息中选择给定语言的信息，并将所选择的信息提供给视频处理部分206，字幕解码器211和音频处理部分213。

10. 发明授权

US5003410A System for recording/reproducing an information source having an apparatus specific identification signal 失效
标题翻译：用于记录/再现具有设备特定识别信号的信息源的系统
公开(公告)号：US5003410A
公开(公告)日：1991-03-26
申请号：US434791
申请日：1989-11-13
申请人： Kenjiro Endoh , Osamu Yasuda
发明人： Kenjiro Endoh , Osamu Yasuda
IPC分类号： G06F1/00 , G11B20/00
CPC分类号： G11B20/00086 , G06F2211/007
摘要： An input section inputs a recording signal to be recorded on a recording medium. An identification signal generator generates a predetermined identification signal. A processor is connected to the input section and the identification signal generator, and selectively processes the recording signal and the identification signal. A detector is connected to the input section, the identification signal generator, and the processor, and detects the presence of a recording restriction signal from the recording signal so as to control the processor in accordance with a detection result. A recording section receives an output signal from the processor, and records the signal on the recording medium.

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