公开(公告)号：US5063445A

公开(公告)日：1991-11-05

申请号：US511374

申请日：1990-04-19

申请人： Taiji Nishizawa ,  Yutaka Tanaka ,  Seiichi Gohshi ,  Junji Kumada ,  Yuichi Iwadate ,  Kazuhiko Shibuya ,  Toshihiko Susaki ,  Yukihiro Nishida ,  Minoru Honda ,  Taiichiro Kurita ,  Yoshinori Izumi ,  Makoto Okui ,  Isao Kondo ,  Ryoichi Yajima ,  Jun'ichi Ishida

发明人： Taiji Nishizawa ,  Yutaka Tanaka ,  Seiichi Gohshi ,  Junji Kumada ,  Yuichi Iwadate ,  Kazuhiko Shibuya ,  Toshihiko Susaki ,  Yukihiro Nishida ,  Minoru Honda ,  Taiichiro Kurita ,  Yoshinori Izumi ,  Makoto Okui ,  Isao Kondo ,  Ryoichi Yajima ,  Jun'ichi Ishida

IPC分类号： G06T9/00 ,  H04N7/015 ,  H04N7/04 ,  H04N11/24

CPC分类号： H04N7/04 ,  G06T9/004 ,  H04N11/008 ,  H04N7/0152

摘要： A multiple sub-sampling encoding/decoding system performing interfield and interframe offset sub-sampling of a broad bandwidth television signal. The system compresses the television signal to fit, for example, to the transmission bandwidth of the standard television systems, compensates the transmission characteristics, and achieves the optimal frequency allocation of the modulated transmission signal.

摘要翻译： 执行宽带电视信号的帧间和帧间偏移子采样的多个子采样编码/解码系统。 该系统压缩电视信号以适应例如标准电视系统的传输带宽，补偿传输特性，并实现调制传输信号的最佳频率分配。

公开(公告)号：US5561467A

公开(公告)日：1996-10-01

申请号：US498778

申请日：1990-03-26

申请人： Yoshio Takeuchi ,  Makoto Okui ,  Isao Kondo ,  Yasuaki Kanatsugu ,  Junji Kumada ,  Taiichiro Kurita ,  Kazuhiko Shibuya ,  Taiji Nishizawa ,  Yutaka Tanaka ,  Minoru Honda ,  Ryoichi Yajima ,  Shoichi Suzuki ,  Hisakazu Kato ,  Hiroyuki Hamazumi ,  Kazumasa Enami ,  Seiichi Gohshi ,  Yoshinori Izumi ,  Haruo Okuda ,  Ichiro Yuyama ,  Sumio Yano ,  Makoto Tadenuma

发明人： Yoshio Takeuchi ,  Makoto Okui ,  Isao Kondo ,  Yasuaki Kanatsugu ,  Junji Kumada ,  Taiichiro Kurita ,  Kazuhiko Shibuya ,  Taiji Nishizawa ,  Yutaka Tanaka ,  Minoru Honda ,  Ryoichi Yajima ,  Shoichi Suzuki ,  Hisakazu Kato ,  Hiroyuki Hamazumi ,  Kazumasa Enami ,  Seiichi Gohshi ,  Yoshinori Izumi ,  Haruo Okuda ,  Ichiro Yuyama ,  Sumio Yano ,  Makoto Tadenuma

IPC分类号： H04N7/00 ,  H04N7/015 ,  H04N7/08 ,  H04N7/081 ,  H04N9/83 ,  H04N11/14 ,  H04N11/24

CPC分类号： H04N7/0152 ,  H04N11/002 ,  H04N7/007 ,  H04N7/0803 ,  H04N7/081 ,  H04N9/832 ,  H04N11/14 ,  H04N7/0122

摘要： High resolution vertical and horizontal components of a high definition video signal are combined with a standard broadcast system video signal, such as the NTSC system, in which high frequency horizontal resolution components are sampled and used to modulate at least a first sub-carrier signal. The first sub-carrier is frequency interleaved onto the standard broadcast signal. Vertical high resolution components are time compressed and time division multiplexed onto top and bottom portions of the standard broadcast signal. The modified broadcast signal can be decoded by a standard receiver to display a standard resolution video image, while receivers designed to decode the modified signal can time division demultiplex the vertical high resolution components and demodulate the horizontal high resolution components, combine these components with the standard components, and generate a high definition video image.

摘要翻译： 高清晰度视频信号的高分辨率垂直和水平分量与诸如NTSC系统的标准广播系统视频信号组合，其中高频水平分辨率分量被采样并用于至少调制第一副载波信号。 第一副载波被频率交织到标准广播信号上。 垂直高分辨率分量被时间压缩并且被时分复用到标准广播信号的顶部和底部。 修改的广播信号可以由标准接收机解码以显示标准分辨率视频图像，而被设计为解码修改的信号的接收机可以对垂直高分辨率分量进行时分解复用并且解调水平高分辨率分量，将这些分量与标准 组件，并生成高分辨率视频图像。

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。

公开(公告)号：US06490010B1

公开(公告)日：2002-12-03

申请号：US09308263

申请日：1999-05-14

申请人： Kazuhiko Shibuya ,  Junji Kumada ,  Yuichi Iwadate ,  Hiroyuki Hamazumi ,  Toshihiro Nomoto ,  Kouichi Takano ,  Tomohiro Saito ,  Shoji Tanaka ,  Fumiaki Minematsu ,  Akinori Hashimoto ,  Shigeyuki Itoh ,  Hajime Matsumura ,  Hisakazu Katoh ,  Masaru Takechi

发明人： Kazuhiko Shibuya ,  Junji Kumada ,  Yuichi Iwadate ,  Hiroyuki Hamazumi ,  Toshihiro Nomoto ,  Kouichi Takano ,  Tomohiro Saito ,  Shoji Tanaka ,  Fumiaki Minematsu ,  Akinori Hashimoto ,  Shigeyuki Itoh ,  Hajime Matsumura ,  Hisakazu Katoh ,  Masaru Takechi

IPC分类号： H04N550

CPC分类号： H03J7/02 ,  H04L27/22 ,  H04L2027/0057 ,  H04N5/4401 ,  H04N5/455 ,  H04N5/50

摘要： Stabilized carrier recovery is achieved even at the time of a low C/N ratio by measuring the phase of a signal and controlling VCO or NCO (Numerical Controlled Oscillator) using only a period having few constellation points. At this time, false lock phenomenon is avoided as follows. That is, relatively short SYNC modulated by an already-known pattern is entered into a modulation wave, VCO or NCO oscillation frequency is swept in a wide range and sweep is stopped at a frequency in which the SYNC can be received, thereby carrying out coarse control AFC. Further, a period having long to some extent, having few constellation points is provided in the modulation wave and then, a difference between the frequency of a received modulated signal and a local oscillation signal of VCO or NCO is obtained in this period. This frequency difference is analyzed according to the phase differential function method, self-correlation function method or count method, and the VCO or NCO is controlled based on this result of analysis.

摘要翻译： 即使在C / N比较低的时候，通过测量信号的相位并且仅使用具有少量星座点的时段来控制VCO或NCO（数控振荡器），也能实现稳定的载波恢复。 此时，如下避免假锁现象。 也就是说，通过已知的模式调制的相对较短的SYNC被输入到调制波中，VCO或NCO振荡频率在宽范围内被扫描，并且在可以接收SYNC的频率上停止扫描，从而执行粗略 控制AFC。 此外，在调制波中提供具有很少的星座点的长时间段，然后在该周期中获得接收到的调制信号的频率与VCO或NCO的本地振荡信号之间的差。 根据相位差函数法，自相关函数法或计数法对该频差进行分析，并根据分析结果对VCO或NCO进行控制。

公开(公告)号：US06813321B1

公开(公告)日：2004-11-02

申请号：US09582229

申请日：2000-07-21

申请人： Hisakazu Katoh ,  Akinori Hashimoto ,  Yuichi Iwadate ,  Kazuhiko Shibuya ,  Fumiaki Minematsu ,  Shigeyuki Itoh ,  Tomohiro Saito ,  Kenichi Shiraishi ,  Akihiro Horii ,  Shoji Matsuda ,  Soichi Shinjo

发明人： Hisakazu Katoh ,  Akinori Hashimoto ,  Yuichi Iwadate ,  Kazuhiko Shibuya ,  Fumiaki Minematsu ,  Shigeyuki Itoh ,  Tomohiro Saito ,  Kenichi Shiraishi ,  Akihiro Horii ,  Shoji Matsuda ,  Soichi Shinjo

IPC分类号： H03D322

CPC分类号： H04L27/2273 ,  H04L7/042 ,  H04L27/0014 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04L2027/0077 ,  H04L2027/0095

摘要： A digital demodulator which will need no absolute phasing circuit is provided. A known-pattern BPSK signal generating circuit 6 generates the same known-pattern BPSK signal as a known-pattern BPSK signal in a received digital modulated wave in synchronism with the known-pattern BPSK signal in the received digital modulated wave, a carrier-reproducing phase error detecting circuit 7 has a phase error table where one of reference phases in a signal point position of a demodulation baseband signal is made a convergence point, a phase error voltage corresponding to a phase error between a phase determined from the signal point position of the demodulation baseband signals and a phase convergence point is sent out, by enable-controlling a carrier-reproducing loop filter 8 according to the known-pattern BPSK signal outputted from the known-pattern BPSK signal generating circuit 6, the phase error voltage is smoothed, and carrier reproduction is performed while controlling the frequency of a reproduced carrier according to the smoothed output so that the phase in the signal point position coincides with the phase convergence point.

摘要翻译： 提供了不需要绝对定相电路的数字解调器。 已知模式BPSK信号发生电路6与接收的数字调制波中的已知模式BPSK信号同步地产生与接收的数字调制波中已知模式BPSK信号相同的已知模式BPSK信号，载波再现 相位误差检测电路7具有相位误差表，其中解调基带信号的信号点位置中的参考相位之一成为会聚点，相位误差电压对应于从信号点位置确定的相位之间的相位误差 通过根据从已知模式BPSK信号发生电路6输出的已知模式BPSK信号启用控制载波再现环路滤波器8，发送解调基带信号和相位收敛点，平滑相位误差电压 并且在根据平滑输出控制再现载波的频率的同时执行载波再现，使得si中的相位 点位置与相位收敛点一致。