公开(公告)号：US5270817A

公开(公告)日：1993-12-14

申请号：US045866

申请日：1993-04-15

申请人： Kenichiro Hayashi ,  Shuji Inoue ,  Sadashi Kageyama ,  Hideyo Uwabata ,  Todd S. Bowser ,  Yoshio Yasumoto

发明人： Kenichiro Hayashi ,  Shuji Inoue ,  Sadashi Kageyama ,  Hideyo Uwabata ,  Todd S. Bowser ,  Yoshio Yasumoto

IPC分类号： H04N5/16 ,  H04N5/18 ,  H04N7/00 ,  H04N7/01 ,  H04N7/015 ,  H04N11/16 ,  H04N7/08 ,  H04N11/00

CPC分类号： H04N7/007 ,  H04N5/16 ,  H04N11/167 ,  H04N5/18 ,  Y10S348/913

摘要： In the television broadcasting system called letter box method, it is proposed to transmit an image having a larger aspect ratio than that of the existing broadcasting system by using some of the scanning lines of the existing broadcasting system, and transmit some additional information signal in the remaining portion. An offset value applied to the additional information signal at the transmission side must be removed completely at the reception side. Accordingly, at the reception side, in the scanning line in which an offset reference signal indicative of the offset value is transmitted, the offset reference value and a DC level reference value of the scanning line are detected, and these values are retained until a next offset reference signal is detected. By detecting a DC level of a scanning line containing the additional information signal, a difference from the DC level reference value previously detected and retained is obtained, and the offset reference value detected and retained previously is corrected by this difference. Thus obtained offset value is subtracted from the transmitted additional information signal.

公开(公告)号：US5535220A

公开(公告)日：1996-07-09

申请号：US182830

申请日：1994-01-19

申请人： Ippei Kanno ,  Seiji Sakashita ,  Hiroaki Ozeki ,  Daisuke Hayashi ,  Todd S. Bowser

发明人： Ippei Kanno ,  Seiji Sakashita ,  Hiroaki Ozeki ,  Daisuke Hayashi ,  Todd S. Bowser

IPC分类号： H03M13/23 ,  H03M13/27 ,  H03M13/33 ,  H04L1/00 ,  H04L7/04 ,  H04L27/00 ,  H04L27/18 ,  G06F11/00

CPC分类号： H04L1/0071 ,  H03M13/271 ,  H03M13/276 ,  H03M13/33 ,  H04L1/0042 ,  H04L1/0054 ,  H04L7/048

摘要： A forward error correcting transmitter and receiver for preventing the erroneous detection of synchronization is provided in a system in which synchronization of an interleaver circuit and a deinterleaver circuit, to be inserted between a convolutional encoder and a Viterbi decoder, is obtained from a synchronization detecting circuit of the Viterbi decoder. A LFSR (Linear Feedback Shift Register) is used as a row-direction address counter during writing and an up/down counter is used as a column-direction address counter during reading, during the interleaver circuit. In the deinterleaver circuit, an up/down counter is used as the column-direction address counter during writing, and an LFSR is used as the row-direction address counter during reading.

摘要翻译： 在从同步检测电路获得插入卷积编码器和维特比译码器之间的交错器电路和去交织器电路的同步的系统中，提供了用于防止同步错误检测的前向纠错发送器和接收器 的维特比解码器。 在写入期间，LFSR（线性反馈移位寄存器）用作行方向地址计数器，并且在交织器电路期间，在读取期间将升/降计数器用作列方向地址计数器。 在去交错电路中，在写入期间使用升/减计数器作为列方向地址计数器，在读取期间使用LFSR作为行方向地址计数器。

公开(公告)号：US06870570B1

公开(公告)日：2005-03-22

申请号：US09702229

申请日：2000-10-31

申请人： Todd S. Bowser

发明人： Todd S. Bowser

IPC分类号： H04N5/445 ,  H04N5/775 ,  H04N7/24 ,  H04N7/00

CPC分类号： H04N21/4117 ,  H04N5/44543 ,  H04N5/775 ,  H04N7/0887 ,  H04N21/235 ,  H04N21/4122 ,  H04N21/4126 ,  H04N21/4348 ,  H04N21/435 ,  H04N21/4355 ,  H04N21/482

摘要： A system for transferring data from a television receiver to a display device and a shared data device includes a digital television receiver, a display device, at least one shared data device, and a communications channel coupled to the television receiver and the shared data devices. The television receiver receives, decodes, and processes a digitally encoded television signal (e.g., MPEG). This processed signal is provided to a display device (e.g., television monitor). In addition, an auxiliary data signal, sent with the digitally encoded television signal, is sent to at least one shared data device. Each of the shared data devices may be a printer, another television receiver, a digital video tape recorder, or a personal digital assistant (PDA). With a system as described herein, the auxiliary data may be an electronic program guide such that a viewer may print a program menu for subsequent review. Upon reviewing the printed program menu, the viewer may then select a channel for viewing or program a video tape recorder to record a selected channel. Alternatively, a viewer may transfer the electronic program guide to a PDA, review the program menu on the PDA, and subsequently program the television receiver, via the PDA, to select a channel for viewing or program a video tape recorder, via the PDA, to record a selected channel.

摘要翻译： 用于将数据从电视接收机传送到显示设备和共享数据设备的系统包括数字电视接收机，显示设备，至少一个共享数据设备以及耦合到电视接收机和共享数据设备的通信信道。 电视接收机接收，解码和处理数字编码的电视信号（例如，MPEG）。 该处理的信号被提供给显示设备（例如，电视监视器）。 此外，与数字编码的电视信号一起发送的辅助数据信号被发送到至少一个共享数据装置。 每个共享数据设备可以是打印机，另一个电视接收机，数字录像机或个人数字助理（PDA）。 利用这里描述的系统，辅助数据可以是电子节目指南，使得观众可以打印用于随后审查的节目菜单。 在查看打印的节目菜单时，观看者可以然后选择用于观看或编程录像机的频道以记录所选频道。 或者，观众可以将电子节目指南传送到PDA，查看PDA上的节目菜单，然后经由PDA对电视接收机进行编程，以经由PDA选择用于观看或编程录像机的频道， 记录所选频道。