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1. 发明授权

US5127022A Differential coding system 失效
标题翻译：差分编码系统
公开(公告)号：US5127022A
公开(公告)日：1992-06-30
申请号：US439815
申请日：1989-11-21
申请人： Toshiyuki Takegahara , Satoru Koizumi , Yoshiharu Hoshino , Hideki Suganami , Kozo Kameda , Takeshi Kimura , Yoshimichi Otsuka
发明人： Toshiyuki Takegahara , Satoru Koizumi , Yoshiharu Hoshino , Hideki Suganami , Kozo Kameda , Takeshi Kimura , Yoshimichi Otsuka
IPC分类号： H03M3/04
CPC分类号： H03M7/3044
摘要： A differential code (DPCM) transmission system for an audio signal, in case higher frequency components thereof are dominant, every another samples of the input signal are alternately into two groups, in each of which differential coding effected, so as to maintain a dynamic range in higher frequency range; when a near instantaneously compressed DPCM signal is transmitted, coding errors caused by the compression are corrected by varying the difference between samples in response to the comparison between a locally decoded signal and the original signal; when the frequency components exceeding one fourth of the sampling frequency are contained in the input signal, successive 3 MSB's having a pattern "1, 0, 1" or "0, 1, 0" are corrected into "1, 1, 1" or "0, 0, 0" respectively; and in case 2 symbols of a tertiary code converted from 3 bits of a binary code are transmitted and restored, peripheral bit arrangement of a matrix having rows consisting of the first symbols of the converted tertiary codes and columns consisting of the second symbols thereof are allotted such as Gray codes are obtained, while an inner 2.times.2 matrix of a 4.times. 4 matrix formed by inserting a new threshold level between two threshold levels provided for detecting the tertiary code is allocated with bits relating to bits arranged at adjacent positions, so as to reduce the bit error rate of the restored binary code.
摘要翻译：用于音频信号的差分码（DPCM）传输系统，在其较高频率分量占优势的情况下，输入信号的每隔一个样本交替地分成两组，每个采样进行差分编码，以保持动态范围在较高的频率范围内; 当发送近瞬时压缩的DPCM信号时，通过响应于本地解码信号与原始信号之间的比较改变样本之间的差异来校正由压缩引起的编码错误; 当超过采样频率四分之一的频率分量包含在输入信号中时，将具有模式“1,0,1”或“0,1,0”的连续3个MSB被校正为“1,1,1”或 “0,0,0” 并且在发送和恢复从二进制码的3位转换的三级代码的2个符号的情况下，分配具有由转换的第三代码的第一符号组成的行的矩阵的周边比特排列以及由其第二个符号组成的列获得格雷码，而通过在提供用于检测第三代码的两个阈值电平之间插入新的阈值电平而形成的4×4矩阵的内部2×2矩阵被分配与位于相邻位置的位有关的位，以便减少恢复的二进制码的误码率。

2. 发明授权

US5228059A Differential code transmission system 失效
标题翻译：差分码传输系统
公开(公告)号：US5228059A
公开(公告)日：1993-07-13
申请号：US832587
申请日：1992-02-07
申请人： Toshiyuki Takegahara , Satoru Koizumi , Yoshiharu Hoshino , Hideki Suganami , Kozo Kameda , Takeshi Kimura , Yoshimichi Otsuka
发明人： Toshiyuki Takegahara , Satoru Koizumi , Yoshiharu Hoshino , Hideki Suganami , Kozo Kameda , Takeshi Kimura , Yoshimichi Otsuka
IPC分类号： H03M3/04 , H04L25/34
CPC分类号： H03M7/3044 , H04B14/066
摘要： As to a differential code (DPCM) transmission system for an input signal as such as an audio signal, in case higher frequency components thereof are dominant, every another samples of the input signal are alternately into two groups, in each of which differential coding effected, so as to maintain a dynamic range in higher frequency range; in case no frequency components exceeding one fourth of the sampling frequency are contained in the input signal, successive 3 MSB's having a pattern "1, 0, 1" or "0, 1, 0" are corrected into "1, 1, 1" or "0, 0, 0" respectively; and in case 2 symbols of a tertiary code converted from 3 bits of a binary code are transmitted and restored, peripheral bit arrangement of a matrix having rows consisting of the first symbols of the converted tertiary codes and columns consisting of the second symbols thereof are allotted such as Gray codes are obtained, while an inner 2.times.2 matrix of a 4.times.4 matrix formed by inserting a new threshold level between two threshold levels provided for detecting the tertiary code is allotted with bits relating to bits arranged at adjacent positions, so as to reduce the bit error rate of the restored binary code.
摘要翻译：对于用于诸如音频信号的输入信号的差分码（DPCM）传输系统，如果其较高频率分量占优势，则输入信号的每隔一个样本交替地分成两组，每一个采样差分编码，以保持较高频率范围内的动态范围; 在输入信号中不包含超过采样频率四分之一的频率分量的情况下，具有模式“1,0”或“0,1,0”的连续3个MSB被校正为“1,1,1” 或“0,0,0” 并且在发送和恢复从二进制码的3位转换的三级代码的2个符号的情况下，分配具有由转换的第三代码的第一符号组成的行的矩阵的周边比特排列以及由其第二个符号组成的列例如格雷码，而通过在提供用于检测第三代码的两个阈值电平之间插入新的阈值电平形成的4×4矩阵的内部2×2矩阵被分配有与布置在相邻位置的位有关的位，以便减少恢复的二进制码的误码率。

3. 发明授权

US5151779A Signal transmission system for high definition television 失效
标题翻译：高分辨率电视信号传输系统
公开(公告)号：US5151779A
公开(公告)日：1992-09-29
申请号：US530760
申请日：1990-05-30
申请人： Yasuaki Kanatsugu , Taiichiro Kurita , Taiji Nishizawa , Yutaka Tanaka , Ryoichi Yajima , Shoichi Suzuki , Hisakazu Kato , Kazumasa Enami , Haruo Okuda , Satoru Koizumi , Hideki Suganami , Toshiyuki Takegahara , Kaoru Watanabe
发明人： Yasuaki Kanatsugu , Taiichiro Kurita , Taiji Nishizawa , Yutaka Tanaka , Ryoichi Yajima , Shoichi Suzuki , Hisakazu Kato , Kazumasa Enami , Haruo Okuda , Satoru Koizumi , Hideki Suganami , Toshiyuki Takegahara , Kaoru Watanabe
IPC分类号： H04N5/60 , H04N7/015 , H04N7/04 , H04N7/081 , H04N7/26
CPC分类号： H04N7/081 , H04N5/60 , H04N5/602 , H04N7/015 , H04N7/04 , H04N19/30 , Y10S348/904
摘要： A signal transmission system for high definition television that can handle a second television signal which is superior in quality to a first television signal such as an NTSC (National Television System Committee) television signal. The transmitting end of the system transmits a first television signal including a video signal, audio signals, etc., through a main transmission line, as well as a third television signal including a high definition components obtained as the difference between the second and the first television signal through an auxiliary transmission line. The receiving end of the system receives and synthesizes the first television signal transmitted through the main transmission line and the third television signal transmitted through the auxiliary transmission line to produce the second television signal.
摘要翻译：一种用于高清晰度电视的信号传输系统，其能够处理质量优于诸如NTSC（国家电视系统委员会）电视信号的第一电视信号的第二电视信号。系统的发送端通过主传输线路发送包括视频信号，音频信号等的第一电视信号，以及第三电视信号，该第三电视信号包括作为第二和第一电视信号通过辅助传输线。系统的接收端接收并合成通过主传输线路发送的第一电视信号和通过辅助传输线路传输的第三电视信号，以产生第二电视信号。

4. 发明授权

US5072297A Method and system for transmitting and receiving PCM audio signals in combination with a video signal 失效
标题翻译：与视频信号结合发送和接收PCM音频信号的方法和系统
公开(公告)号：US5072297A
公开(公告)日：1991-12-10
申请号：US499874
申请日：1990-03-27
申请人： Masaru Kanazawa , Taiichiro Kurita , Kazuhiko Shibuya , Taiji Nishizawa , Yutaka Tanaka , Minoru Honda , Kazumasa Enami , Haruo Okuda , Hideki Suganami , Yoshiharu Hoshino , Toshiyuki Takegahara , Kaoru Watanabe
发明人： Masaru Kanazawa , Taiichiro Kurita , Kazuhiko Shibuya , Taiji Nishizawa , Yutaka Tanaka , Minoru Honda , Kazumasa Enami , Haruo Okuda , Hideki Suganami , Yoshiharu Hoshino , Toshiyuki Takegahara , Kaoru Watanabe
IPC分类号： H04N7/04 , H04N7/088
CPC分类号： H04N7/04 , H04N7/088
摘要： A method and system for multiplexing additional audio information in the form of pulse code modulation (PCM) audio signals onto a television signal. The PCM audio signal is time multiplexed into scanning retrace intervals of the video signal. At a receiver, the bit error rate of the decoded PCM audio signal is compared with a threshold so as to switch the audio output from the PCM audio signal to a conventional FM demodulated audio signal when the bit error rate exceeds the predetermined threshold. In this way, the benefits of both PCM audio and FM audio can be obtained by utilizing the higher immunity of FM signals in low signal-to-noise ratio environments, while the high fidelity PCM audio signal is utilized when the signal-to-noise ratio environment is relatively high.
摘要翻译：一种用于将以脉冲编码调制（PCM）音频信号的形式的附加音频信息复用到电视信号上的方法和系统。 PCM音频信号被时分复用成视频信号的扫描回扫间隔。在接收机处，将解码的PCM音频信号的误码率与阈值进行比较，以便当误码率超过预定阈值时，将音频输出从PCM音频信号切换到常规的FM解调音频信号。以这种方式，通过在低信噪比环境中利用FM信号的更高的抗扰度，可以获得PCM音频和FM音频两者的优点，而当使用高保真PCM音频信号时，信噪比比例环境比较高。

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