JPS6022887A - Broadcast signal display device - Google Patents

Abstract

PURPOSE:To attain channel display or display of tuning state or the like at the same time by means of one character display circuit by adding the information of the presence or absence of a television signal or tuning state as the channel display on a television screen. CONSTITUTION:A broadcast identification circuit 12 receiving each signal (video tuning signal, sound tuning signal and horizontal synchronizing signal) from a video detecting circuit 3, a sound detecting circuit 6 and a synchronism deflection circuit 8 detects the presence or absence of the television signal and the tuning state from each input signal and outputs the result to a micro-controller 33. The micro-controller 33 converts the information representing the presence or absence of the television signal and tuning state into color designating information, feeds the information to an on-screen character display circuit 11, where a video signal adding the color designation information to a character signal generated from a character generator 24 is formed. Thus, the channel display displayed on a cathode ray tube 9 is changed depending on the presence or absence of the television signal and the tuning state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a broadcast signal display device for displaying on a television receiver.

Recently, micro-channels have been used as tuning devices for television receivers.
Digital tuning methods using controllers began to be used. This digital tuning method outputs control signals from a broadcast signal identification circuit, such as an automatic tuning function that tunes the presence or absence of radio waves transmitted from broadcast stations, and an automatic fine tuning function that searches for offset broadcast stations within a channel. This signal is then used for automatic tuning and automatic fine tuning. This broadcast signal identification circuit is
After detecting the horizontal synchronizing signal of the synchronizing signal separation circuit and identifying the presence or absence of a television signal, the state of synchronization can be read from the video carrier wave and audio carrier wave detector, and the output level of the video signal detection circuit can be detected to be unnecessary. It detects whether the electric field is appropriately weak or not. The microcontroller 2 used in such a channel selection device N stores data t1 on the presence or absence of a television number and the tuning state outputted from the broadcast signal identification circuit.

In the conventional digital tuning method, if you want to display the tuning status, etc., a band is output on the screen separately from the channel display, and the change in color or width of the band is displayed. ing. This conventional method has the drawback of requiring an extra on-screen character display circuit for outputting an image such as a character on the screen in addition to the channel display.

The purpose of the invention is to eliminate such drawbacks and to change the color, size, position, etc. of the channel display on the screen, so that it can be displayed at the same time as the channel display on the TV show. It is possible to display the state of synchronization.f>k(L
We are pleased to announce that we will be providing a revised version of Broadcast No. 18.

Broadcast No. 18 of the present invention displayed iron II! 1. inputs the television reception (video tuner issue, audio tuner issue and horizontal opening Jυ, +1L! issue in the TV) and the TV 4nS
a broadcast signal identification circuit that detects the presence or absence of the broadcast signal identification circuit and its tuning state; A microcontroller, a character generator that converts the channel information from this microcontroller into a character signal, and a character signal from this character generator that is designated gold and displayed.
I! In addition, the presence or absence of a television signal from the microcontroller and its tuning information are converted into a video signal by specifying the color and displayed on the television receiver Kti.
It is composed of a screen, a character, and a nice play circuit.

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram of a television receiver according to an embodiment of the invention. In this embodiment, the presence or absence of a television signal and the state of tuning are expressed by changes in the color of the channel display on the television screen. In the figure, the broadcast signal identification circuit 12 uses the video same signal from the video detection circuit 3 and f? Audio tuning 11 from detection circuit 6
signal and a horizontal synchronization signal from the synchronization deflection circuit 8 are input.

This broadcast signal identification circuit 121'J- detects the presence or absence of the prevision (J4) and the tuning state from each of these 4 input numbers, and outputs it to the microcontroller 33. 33 is a tuner S 11/(: a sound used as a channel selection decoration).The on-screen character Tisgelei circuit 11 displays the channel information that is currently being received (currently being selected) for 1 hour.
At the same time, the stored information on the presence or absence of a television signal and the status of the television signal from the broadcast signal identification circuit 12 is converted into color designation information and sent to the on-screen character display circuit 11. This on-screen character display circuit 11V'i is sent from the microcontroller 33 to the channel 1fi'At.
The character generator 24 converts it into a character signal that can be displayed on a 1m circle, and adds the hue button 1^ information to the character 16 to create the image 11. It is output to the amplification circuit 4. Accordingly, the color of the channel information on the screen changes depending on the presence or absence of the preview time signal and the tuning state.

As explained above, according to the present invention, by adding information on the presence or absence of a television subscriber and the tuning status to the channel display on the television screen, it is possible to display the channel using one on-screen character display circuit. A broadcast signal display device is obtained in which the display and the presence or absence of television No. 1a and the tuning state are simultaneously displayed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a television reception system including an embodiment of the present invention. In the figure, 1... tuner part,
2...Video intermediate frequency amplification circuit, 3...
Video detection circuit, 4...Video signal amplification circuit, 5.
...Audio intermediate frequency amplification circuit, 6...Audio detection circuit, 7...Low frequency amplification circuit, 8...
...Synchronous deflection circuit, 7...Cathode ray tube, 10.
... Speaker, 11 ... On-screen character display circuit, 12 ... Broadcasting number A identification circuit, 21 ... High frequency amplification circuit,
22...Mixing circuit, 23...Local oscillation circuit, 24...Character generator, 3
1...Voltage control generator Mt generator, 32...L
Pk', 33... microcontroller. Agent Patent Attorney Oto Uchihara

Claims (1)

[Claims] A video tuning signal in a television receiver includes a broadcast signal identification circuit which inputs an audio signal and a horizontal synchronization signal and detects the presence or absence of the television signal and its tuning state; A microcontroller that detects the reception 1?1 channel 1^ information from the tuner section of the receiver, a character generator that converts the channel information from this microcontroller into a character signal, and a character generator that converts the channel information from this microcontroller into a character signal. Specify the color of the character 1a and convert it into a video signal, and then specify the color of the TV vision signal from the microcontroller (j) and its synchronization information, convert it into a video signal, and convert it to the video signal No. 11. ! A broadcast signal display device including an on-screen character display circuit for displaying on a ht.