公开(公告)号：US5416508A

公开(公告)日：1995-05-16

申请号：US278123

申请日：1994-07-21

申请人： Kazushi Sakuma ,  Eiji Ohga ,  Masahiko Kawasaki ,  Kimihito Harada ,  Tatsuo Takahashi ,  Ruysuke Tozaki

发明人： Kazushi Sakuma ,  Eiji Ohga ,  Masahiko Kawasaki ,  Kimihito Harada ,  Tatsuo Takahashi ,  Ruysuke Tozaki

IPC分类号： H04N7/167 ,  H04N7/173 ,  H04N7/16

CPC分类号： H04N7/1675 ,  H04N21/23614 ,  H04N21/4221 ,  H04N21/47211 ,  H04N21/84 ,  H04N21/8455 ,  H04N7/17363

摘要： A CATV center facility transmits, together with the television signals of a plurality of programs, display control data indicating program names and selection numbers of the respective programs and channel data indicating the numbers of channels on which the respective programs are being broadcast or to be broadcast. A terminal apparatus detects the program names, selection numbers and channel numbers from the display control data and the channel data, and makes a TV receiver display the detected program names and selection numbers in an associated manner. While looking at a picture thus displayed, a user selects a desired program by pushing a corresponding numeral button of a remote controller or a keyboard. In response to the program selection by the user, the terminal apparatus is tuned to the channel of the selected program.

摘要翻译： CATV中心设施与多个节目的电视信号一起发送指示节目名称和各个节目的选择号码的显示控制数据，以及指示各节目正在广播或被广播的频道数量的频道数据 。 终端设备从显示控制数据和频道数据中检测节目名称，选择号码和频道号码，并使TV接收机以相关的方式显示检测到的节目名称和选择号码。 在观看如此显示的照片时，用户通过按下遥控器或键盘的对应的数字按钮来选择所需的节目。 响应于用户的节目选择，终端装置被调谐到所选节目的频道。

公开(公告)号：US5103477A

公开(公告)日：1992-04-07

申请号：US569034

申请日：1990-08-17

申请人： Kimihito Harada ,  Akira Ideno

发明人： Kimihito Harada ,  Akira Ideno

IPC分类号： G06F21/10 ,  H04N7/167 ,  H04N7/171

CPC分类号： H04N7/1713 ,  H04N7/1675

摘要： An extension control signal for a vertical blanking interval (VBI) rises at a timing delayed from the last key signal before the VBI by 64 .mu.sec plus the time difference between the key signal and horizontal synchronizing signal section, and falls at a timing delayed from the first key signal after lack of the key signal detection by an extension period of the horizontal synchronizing signal section plus the above time difference.

摘要翻译： 用于垂直消隐间隔（VBI）的扩展控制信号在VBI之前的最后一个键信号延迟64μsec加上键信号和水平同步信号部分之间的时间差的定时上升，并且在从 在水平同步信号部分的延长时间段加上上述时间差之后缺少关键信号检测的第一个键信号。

公开(公告)号：US5113441A

公开(公告)日：1992-05-12

申请号：US481270

申请日：1990-02-20

申请人： Kimihito Harada

发明人： Kimihito Harada

IPC分类号： H04N7/167 ,  H04N7/171

CPC分类号： H04N7/1675 ,  H04N7/1713

摘要： A method of scrambling a television signal and a method of and apparatus for descrambling a television signal is provided. An audio signal is used on which a key signal containing compression information and information concerning the position of a vertical blanking interval is superimposed on a portion of the audio signal corresponding to a horizontal blanking interval. In addition, a pseudo-key signal is superimposed on the audio signal at a portion which corresponds to a vertical blanking interval, so that the vertical blanking interval cannot be detected through the detection of the audio signal. As a result, an expansion signal for expanding the signal in the horizontal blanking interval and vertical blanking interval compressed by scrambling cannot be formed in its normal position. Thus, unauthorized access is difficult. Descrambling can be performed by detecting the vertical blanking interval based on the information concerning the position of the vertical blanking interval contained in the key signal, and decoding the information for the position which is transmitted in the form of out-band data. Compression information can then be extracted from the key signal based on the detected vertical blanking interval, and an expansion signal for expanding the signal in the horizontal and vertical blanking periods can be generated.

摘要翻译： 提供一种加扰电视信号的方法以及用于解扰电视信号的方法和设备。 使用音频信号，其中包含压缩信息的关键信号和关于垂直消隐间隔的位置的信息被叠加在对应于水平消隐间隔的音频信号的一部分上。 此外，在对应于垂直消隐间隔的部分，将伪键信号叠加在音频信号上，使得不能通过检测音频信号来检测垂直消隐间隔。 结果，用于扩展水平消隐间隔中的信号的扩展信号和通过加扰压缩的垂直消隐间隔不能形成在其正常位置。 因此，未经授权的访问是困难的。 可以通过基于关于包含在密钥信号中的垂直消隐间隔的位置的信息来检测垂直消隐间隔，并对以带外数据形式发送的位置的信息进行解码来执行解扰。 然后可以基于检测到的垂直消隐间隔从键信号中提取压缩信息，并且可以产生用于在水平和垂直消隐周期中扩展信号的扩展信号。