公开(公告)号：US20020023262A1

公开(公告)日：2002-02-21

申请号：US09738709

申请日：2000-12-15

Applicant: U.S. Philips Corporation

Inventor： Christopher R. Porter

IPC: H04N007/16

CPC classification number: H04N21/4396 ,  H04N7/16 ,  H04N21/23614 ,  H04N21/4348 ,  H04N21/441 ,  H04N21/4508 ,  H04N21/4542 ,  H04N21/84

Abstract: An arrangement for the control of viewing of a television programme in which a classification code is transmitted with the video signal, for example in an extension packet of a teletext signal, includes a decoder (23) which detects the received codes and passes them to a microcontroller (27). An authorised user is able to enter codes of permitted programme classifications by means of a remote control unit (28). Codes representing these permitted classifications are stored in a non-volatile memory (29). The received and permitted codes are compared in the micro controller (27) that inhibits the video (25) and/or audio (32) circuits if the received codes are not permitted codes. A second tuner 40 is provided which is controlled by the processor (27) to cycle through the available channels and for each channel the processor determines the classification codes being transmitted and notes those channels which have non-permitted (or permitted) classification codes. When requests for channel changes are made the processor (27) determines whether the channel has a permitted classification code and if not causes the tuner (21) to select an alternative channel.

Abstract translation: 用于控制与视频信号一起发送分类码的电视节目的控制装置，例如在图文电视信号的扩展分组中，包括：解码器（23），其检测接收到的代码并将其传递给 微控制器（27）。 授权用户能够通过遥控单元（28）输入允许节目分类的代码。 代表这些允许分类的代码被存储在非易失性存储器（29）中。 如果接收到的代码是不允许的代码，则在禁止视频（25）和/或音频（32）电路的微控制器（27）中比较接收和允许的代码。 提供第二调谐器40，其由处理器（27）控制以循环可用信道，并且对于每个信道，处理器确定正在发送的分类代码并且记录那些具有不允许（或允许的）分类代码的信道。 当进行频道更改的请求时，处理器（27）确定该频道是否具有允许的分类代码，并且如果不使调谐器（21）选择替代频道。