Selective video reception control system

• US 4,375,651 A
• Filed: 07/27/1981
• Issued: 03/01/1983
• Est. Priority Date: 07/27/1981
• Status: Expired due to Term

• Current Assignee: Zenith Radio Corporation
• Original Assignee: Zenith Radio Corporation
• Inventors: Zato, Thomas J., Templin, Frank C.
• Primary Examiner(s): Masinick, Michael A.
• Application Number:
  US06/287,410
• Time in Patent Office: 582 Days
• Field of Search: 358/191.1, 358/192.1, 358/194.1, 358/195.1, 358/86, 358/84
• US Class Current: 348/731
• CPC Class Codes: H04N 5/44 Receiver circuitry for the reception of television signals according to analogue transmission standards H04N5/14 takes precedence

Abstract

A system for controlling a channel/band selective microcomputer programmed indirect frequency synthesis tuner is disclosed. Separate groups of VHF, UHF or CATV channels are programmed by means of a key switch having various positions of engagement corresponding to individual groups of channels. Following key switch selection of a given group of channels, any number of channels within that group may be programmed for viewing by means of channel UP and DOWN selector keys. A RAM is used to store "saved" and "skipped" channels for each key switch position. A backup non-volatile MNOS memory is provided for preserving stored data in the event AC power is removed. Also provided is programmable raster blanking for audio-only channels thus eliminating unwanted video snow. Front panel LED indicators inform the programmer of the status of each channel during television receiver programming. The television receiver is turned on by viewer selection of either the channel UP or DOWN control resulting in tuning to either the lowest or highest "saved" channel. The OFF function is activated anytime an attempt is made to advance past either the highest or lowest programmed channel by providing either a channel UP or DOWN command, respectively. Thus, television receiver control is by means of a single user selector. A wired remote controller with a speaker is also provided.

Claims

1. In a microcomputer controlled indirect frequency synthesis tuning system for tuning a television receiver to a desired channel in a designated one of a plurality of frequency bands, a programmable system for selectively limiting the channels and frequency bands to which said television receiver may be tuned comprising:

first memory means in said microcomputer for storing channel tuning and frequency band switching information;

first control means coupled to an electrical line source for applying said line source to said television receiver when engaged and coupled to said microcomputer for reading frequency band switching information representing a plurality of designated groups of channels from said first memory means and for providing said frequency band switching information to said tuning system;

second control means coupled to said microcomputer for selectively storing in said first memory means channel access information for tuning to a selected channel or channel skip information for inhibiting tuning to a selected channel; and

third control means coupled to said microcomputer for reading from said first memory means in an increasing or decreasing channel number sequence channel access or skip information and channel tuning information and for respectively providing or not providing said channel tuning information to said tuning system in limiting the tuning of said television receiver only to selected channels in each of said plurality of frequency bands.

2. The system of claim 1 wherein raster blanking information is stored in said first memory means by said second control means for the video blanking of said television receiver in tuning to a television channel wherein only an audio signal is received.

3. A system according to claim 1 wherein said television receiver is turned off by the actuation of said third control means in selecting a channel number greater than the highest channel number for which channel access information is stored in said first memory means.

4. A system according to claim 3 wherein said television receiver is turned on by the actuation of said third control means in selecting a higher channel number when said television receiver is off.

5. The system of claim 1 further comprising a hard-wired remote control unit including speaker means, volume control means and fourth control means for reading from said first memory means in an increasing channel number sequence channel access or skip information and channel tuning information and for respectively providing or not providing said channel tuning information to said tuning system in selectively limiting the tuning of said television receiver only to designated channels in each of said plurality of frequency bands.

6. The system according to claim 5 wherein said television receiver is turned off by the actuation of said fourth control means so as to select a channel number greater than the highest channel number for which channel access information is stored in said first memory means.

7. A system according to claim 6 wherein said television receiver is turned on by the actuation of said fourth control means in selecting a higher channel number when said television receiver is off.

8. The system of claim 2 further comprising first, second and third display means coupled to said microcomputer for receiving from said first memory means and displaying channel access or skip information, video blanking information and selected channel number, respectively.

9. The system of claim 1 further comprising fifth control means for selecting either VHF/UHF frequency bands or the CATV frequency band wherein any one of a plurality of groups of CATV channels may be selected by said first control means.

10. The system of claim 1 further comprising nonvolatile memory means coupled to said first memory means for storing said channel access and skip information, said frequency band switching information and said tuning information and for providing said information to said first memory means for storage therein if said line source is removed from said television receiver.

11. In a microcomputer controlled indirect frequency synthesis tuning system for tuning a television receiver to a desired channel in a designated one of a plurality of frequency bands, said tuning system including means for selecting either VHF/UHF frequency bands or the CATV frequency band, a programmable system for selectively limiting the channels and frequency bands to which said television receiver may be tuned comprising:

first memory means in said microcomputer for storing channel tuning and frequency band switching information;

first control means coupled to an electrical line source for applying said line source to said television receiver when engaged and coupled to said microcomputer for reading frequency band switching information representing a plurality of designated groups of CATV channels from said first memory means and for providing said frequency band switching information to said tuning system when the CATV frequency band is selected by said frequency band selection means;

second control means coupled to said microcomputer for selectively storing in said first memory means channel access information for tuning to a selected channel or channel skip information for inhibiting tuning to a selected channel; and

third control means coupled to said microcomputer for reading from said first memory means in an increasing or decreasing channel number sequence channel access or skip information and channel tuning information and for respectively providing or not providing said channel tuning information to said tuning system in limiting the tuning of said television receiver only to selected CATV channels in each of said pluralities of designated groups of CATV channels.

12. In a microcomputer controlled indirect frequency synthesis tuning system for tuning a television receiver having a video display to a desired channel in a designated one of a plurality of frequency bands, said tuning system including means for selecting either VHF/UHF frequency bands or the CATV frequency band, a programmable system for selectively limiting the channels and frequency bands to which said television receiver may be tuned and for selectively blanking the video display of said television receiver, said system comprising:

first memory means in said microcomputer for storing channel tuning and frequency band switching information;

first control means coupled to an electrical line source for applying said line source to said television receiver when engaged and coupled to said microcomputer for reading frequency band switching information representing a plurality of designated groups of CATV channels from said first memory means and for providing said frequency band switching information to said tuning system when the CATV frequency band is selected by said frequency band selection means;

second control means coupled to said microcomputer for selectively storing in said first memory means;

channel access information for tuning to a selected channel or channel skip information for inhibiting tuning to a selected channel; and

raster blanking information for the selective video blanking of the television receiver'"'"'s video display; and

third control means coupled to said microcomputer for reading from said first memory means in an increasing or decreasing channel number sequence channel access or skip information and channel tuning information and for respectively providing or not providing said channel tuning information to said tuning system in limiting the tuning of said television receiver only to selected CATV channels in each of said pluralities of designated groups of CATV channels and for reading from said first memory means and providing to said video display raster blanking information for the selective blanking of said television receiver.

13. In a microcomputer controlled indirect frequency synthesis tuning system for tuning a television receiver to a desired channel in a designated one of a plurality of frequency bands, a programmable system for selectively limiting the channels and frequency bands to which said television receiver may be tuned comprising:

first memory means in said microcomputer for storing channel tuning and frequency band switching information;

first control means coupled to an electrical line source for applying said line source to said television receiver when engaged and coupled to said microcomputer for reading frequency band switching information representing a designated group of channels from said first memory means and for providing said frequency band switching information to said tuning system;

second control means coupled to said microcomputer for selectively storing in said first memory means channel access information for tuning to a selected channel or channel skip information for inhibiting tuning to a selected channel; and

channel selection means coupled to said microcomputer for;

reading from said first memory means in an increasing or decreasing channel number sequence channel access or skip information and channel tuning information and for respectively providing or not providing said channel tuning information to said tuning system in limiting the tuning of said television receiver only to selected channels in each of said plurality of frequency bands;

turning off said television receiver by selecting a channel number greater than the highest channel number for which channel access information is stored in said first memory means; and

turning on said television receiver by selecting a higher channel number when said television receiver is off.

14. In a microcomputer controlled indirect frequency synthesis tuning system for tuning a television receiver to a desired channel in a designated one of a plurality of frequency bands, a programmable system for selectively limiting the channels and frequency bands to which said television receiver may be tuned comprising:

first memory means in said microcomputer for storing channel tuning and frequency band switching information;

first control means coupled to an electrical line source for applying said line source to said television receiver when engaged and coupled to said microcomputer for reading frequency band switching information representing a designated group of channels from said first memory means and for providing said frequency band switching information to said tuning system;

second control means coupled to said microcomputer for selectively storing in said first memory means channel access information for tuning to a selected channel or channel skip information for inhibiting tuning to a selected channel;

third control means coupled to said microcomputer for reading from said first memory means in an increasing or decreasing channel number sequence channel access or skip information and channel tuning information and for respectively providing or not providing said channel tuning information to said tuning system in limiting the tuning of said television receiver only to selected channels in each of said plurality of frequency bands; and

hard-wired remote control means including speaker means, volume control means and fourth control means for reading from said first memory means in an increasing channel number sequence channel access or skip information and channel tuning information and for respectively providing or not providing said channel tuning information to said tuning system in selectively limiting the tuning of said television receiver only to designated channels in each of said plurality of frequency bands wherein said television receiver is turned on by the actuation of said third or fourth control means in selecting a higher or lower channel and said television receiver is turned off by the actuation of said third or fourth control means in selecting a channel number greater than the highest or less than the lowest channel number for which channel access information is stored in said first memory means.

15. In a microcomputer controlled indirect frequency synthesis tuning system for tuning a television receiver having a video display to a desired channel in a designated one of a plurality of frequency bands, said tuning system including means for selecting either VHF/UHF frequency bands or the CATV frequency band, a programmable system for selectively limiting the channels and frequency bands to which said television receiver may be tuned and for selectively blanking the television receiver'"'"'s video display, said system comprising:

first memory means in said microcomputer for storing channel tuning and frequency band switching information;

first control means coupled to an electrical line source for applying said line source to said television receiver when engaged and coupled to said microcomputer for reading frequency band switching information representing a plurality of designated groups of CATV channels from said first memory means and for providing said frequency band switching information to said tuning system when the CATV frequency band is selected by said frequency band selection means;

second control means coupled to said microcomputer for selectively storing in said first memory means;

channel access information for tuning to a selected channel or channel skip information for inhibiting tuning to a selected channel; and

raster blanking information for the selective video blanking of said television receiver'"'"'s video display; and

non-volatile memory means coupled to said first memory means for storing said channel access and skip information, said frequency band switching information and said tuning information and for providing said information to said first memory means for storage therein if said line source is removed from said television receiver;

first, second and third display means coupled to said microcomputer for receiving from said first memory means and displaying channel access or skip information, video blanking information and selected channel number, respectively; and

third control means coupled to said microcomputer for reading from said first memory means in an increasing or decreasing channel number sequence channel access or skip information and channel tuning information and for respectively providing or not providing said channel tuning information to said tuning system in limiting the tuning of said television receiver only to selected CATV channels in each of said pluralities of designated groups of CATV channels and for reading from said first memory means and providing to said video display raster blanking information for the selective blanking of said television receiver.