Automated language filter for TV receiver
A method and apparatus for use in connection with home television receivers involving processing an electronic signal, including audio and video processors; the audio information, including digital representations thereof, is analyzed and modified to compare words and phrases represented in the audio information with words and phrases stored in electronic memory for elimination of undesirable words or phrases in audible or visible representations of the audio with options for replacing undesirable words with acceptable words. The options include varying degrees of selectivity in specifying words as undesirable and control over substitute words which are used to replace undesirable words. The options for control of the method and apparatus for language filtering are selectable from an on-screen menu through use of a conventional television remote transmitter. Full capability of the method and apparatus depends only on presence of closed caption or similar digitally-encoded language information being received with a television signal special instructions transmitted with a television signal may also be responded to for activating particular language libraries customizing a library for the program material, as well as unrelated viewer information and control functions.
1. Home television apparatus for processing an analog or digital electronic signal including an audio portion, a video portion, a spoken component portion related to the audio portion, an auxiliary information component and an on-screen display, said apparatus comprising:
a text generator connected to receive a portion of said electronic signal to produce a text representation of said spoken component portion;
a video path by which video portions of said electronic signal are processed and made available to a user display;
an audio path by which audio portions of said electronic signal are processed and made available to a user audio output device;
a programmable controller with a data memory including at least one text library;
said programmable controller having a text editor for analyzing said text representation to determine if said spoken component contains words corresponding to undesirable words or phrases stored in a selected library of said memory;
said text editor being configured to replace any detected undesirable word or phrase with another word, phrase, or blank space from a selected library of said memory to produce a modified spoken component including a modified text signal for said on-screen display;
an audio switch in said audio path for selectively modifying a corresponding audio portion of said electronic signal if undesirable words or phrases are detected within a segment of a spoken component portion;
said audio switch being controlled to cease modifications at the conclusion of said segment; and
an on-screen display connected in said video path to produce a video display component representing said modified text signal;
a video display unit connected to receive said video portions of the electronic signal including said video display component.
2. The apparatus as recited in claim 1 , wherein said programmable controller is adapted to selectively provide different modes of operation with respect to the displaying of said modified spoken component which include:
(1) a full captioning mode in which all modified or unmodified text information data are displayed;
(2) a normal captioning mode in which only modified text information data which represent the replacement words or phrases are displayed; and,
(3) a no-captioning mode in which no word or phrase is displayed.
3. Apparatus as recited in claim 1 , wherein undesirable words or phrases are stored in at least one library memory and characters of text representation segments are compared with characters of such undesirable words or phrases for detection thereof.
4. Apparatus as recited in claim 3 , wherein substitute inoffensive words are contained in a library memory with reference pointers to undesirable words or phrases they should replace.
5. Apparatus as recited in claim 2 further including a speech synthesizer arranged to produce a spoken audio portion corresponding to said modified closed caption signal text and said audio switch is controllable by said operations and mode controller to insert synthesized speech audio for selected segments of the audio portion of said electronic signal.
6. Apparatus as recited in claim 1 , wherein said programmable controller includes an on-screen menu generator and an infrared signal receiver and interface for receiving program instructions from a conventional television remote control unit.
7. Apparatus as recited in claim 2 further including a speech recognizer connected to receive said electronic signal audio portion and produce digitally-coded signals wherein undesirable words or phrases can be recognized by said text editor.
8. Television apparatus for processing a digital electronic signal including an audio portion, a video portion, a spoken component portion related to the audio portion, an auxiliary information component and an on-screen display, said apparatus comprising:
a text generator connected to receive a portion of said digital electronic signal to produce a text representation of said spoken component portion;
a video path by which video portions of said digital electronic signal are processed and made available to a user display;
an audio path by which audio portions of said digital electronic signal are processed and made available to a user audio output device;
a programmable controller with a data memory including at lest one text library;
said programmable controller having a text editor for analyzing said text representation to determine if said spoken component contains words corresponding to undesirable words or phrases stored in a selected library of said memory;
said text editor being configured to replace any detected undesirable word or phrase with another word, phrase, or blank space from a selected library of said memory to produce a modified spoken component including a modified text signal for an on-screen display;
an audio switch in said audio path for selectively modifying a corresponding audio portion of said electronic signal if undesirable words or phrases are detected within a segment of a spoken component portion; and
an on-screen display connected in said video path to produce a video display component representing said modified text signal;
a video display unit connected to receive said video portions of said electronic signal including said video display component.
9. The apparatus as recited in claim 8 , wherein said programmable controller is adapted to selectively provide different modes of operation with respect to the displaying of said modified spoken component which include:
(1) a fully captioning mode in which all modified or unmodified text information data are displayed;
(2) a normal captioning mode in which only modified text information data which represent the replacement words or phrases are displayed; and,
(3) a no-captioning mode in which no word or phrase is displayed.
10. Apparatus as recited in claim 8 , wherein undesirable words or phrases are stored in at least one library memory and characters of text representation segments are compared with characters of such undesirable words or phrases for detection thereof.
11. Apparatus as recited in claim 10 , wherein substitute inoffensive words are contained in a library memory with reference pointers to undesirable words or phrases they should replace.
12. Apparatus as recited in claim 9 further including a speech synthesizer arranged to produce a spoken audio portion corresponding to said modified text and said audio switch is controllable by said operations and mode controller to insert synthesized speech audio for selected segments of the audio portion of said electronic signal.
13. Apparatus as recited in claim 8 , wherein said programmable controller includes an on-screen menu generator and an infrared signal receiver and interface for receiving program instructions from a conventional television remote control unit.
14. Apparatus as recited in claim 9 further including a speech recognizer connected to receive said electronic signal audio portion and produce digitally-coded signals wherein undesirable words or phrases can be recognized by said text editor.