JPH0368287A - Tv receiver - Google Patents

Abstract

PURPOSE:To easily recognize all channels including a broadcast signal by applying display representing a channel including a broadcast signal based on a data stored in a memory. CONSTITUTION:Whether or not a broadcast signal is included in a reception channel is discriminated and a data representing a channel number of a channel including the signal is stored in a memory 13 and the display data of the channel number is outputted. The user easily grasps the channel including the signal other than the receiving channel and easily recognizes the data and reception channel stored in the memory 13 during the automatic memory operation mode.

Description

[Detailed Description of the Invention] FObject of the Invention] (Industrial Application Field) The present invention relates to a television receiver that receives broadcasting (i"j\1), and particularly relates to a TV receiver that has a durable on-screen display. The present invention relates to a television receiver suitable for.

(Prior Art) Conventionally, in television receivers, the method of tuning operation for specifying the receiving channel is one-touch tuning, which is operated using keys corresponding to each receiving channel, and key operation using a 10-key keyboard. Direct channel selection, which generally uses two channel selection buttons, and up-down channel selection, which is operated by sequentially switching from the smaller channel number to the larger one (up) or in the opposite direction (down). be.

In cases where there are multiple channels such as CATV, or when some broadcasting stations have stopped broadcasting late at night, etc., the 1-user can check which channel is broadcasting. There are many things that we do not understand,
In such cases, it is convenient to use up-down channel selection. In up-down tuning, for example, by operating an up button, the tuner selects the next channel whose channel number 0 is one higher than the receiving channel. Now, if there is no broadcasting on this channel, the channel 1 is skipped over IS, and the first channel 11 is selected. Therefore, the user can access the channel currently being broadcast (hereinafter referred to as 613).
You can easily receive the signal channel by operating the up button or down button.

However, users cannot instantly grasp the channel numbers of all signal channels. 1. In up-down channel selection, when the channel selection operation is completed and the receiving channel is displayed on the art dealer's on-screen display, the receiving channel is displayed for the first time.
You can know the signal channel. Therefore, in order to know all the right signal channels, the caller must repeatedly operate the up/down buttons and memorize the channel list that is displayed every time the channel selection operation is completed, which is extremely complicated and takes a long time. You must perform the following operations.

Furthermore, some conventional preview receivers have a function of storing the dial number of the 4-J signal block (hereinafter referred to as an auto memory function). That is, the tube receives each channel by sequentially changing the received fε frequency. When a signaled channel is received, the channel number is stored in memory. The user enters a code (hereinafter referred to as
By operating a one-touch key or an up/down key or the like to specify a positive control number), a signaled channel can be received.

However, in this case, the user can decide which channel number is stored in the memory.
You can't know unless you enter the channel number to select the channel and display the channel number on the display screen.

(Problems to be Solved by the Invention) In this way, the J3
In the case of a channel selection system that employs an up-down channel selection or automatic metering function, it is possible to know the receiving channel number for the first time by performing the channel selection operation, and all signaled channels are available. There was a problem in that the channel number d could not be grasped instantly.

The present invention solves such problems 1. This was done by looking at the channel number YJ of all C signal channels. It is an object of the present invention to provide a television receiver that can be used to grasp the following information.

"Configuration of Defense" (Means for Solving the Problems) The television receiver according to the present invention is capable of selecting a plurality of channels. a broadcast signal determination circuit that determines whether or not a broadcast signal exists and outputs a determination signal; a control means for outputting data indicating the channel when it is determined that the channel is in the channel; a memory for storing the output data of the control means; It is equipped with a 1J display section to show which channels are included.

(Function) In the present invention, the υ control means outputs a tuning voltage to cause the tuner to sequentially select channels. Whether or not a broadcast signal exists on the channel selected by the tuner is determined by the broadcast signal up-down window circuit. The control means stores data indicating this channel in the memory based on the determination signal when it is determined by the determination circuit that there is a broadcast (fj number) on the C reception channel. Based on the data, a display indicating the 17 channels including the broadcast signal is performed.

(Embodiments) Hereinafter, embodiments of the present invention will be explained in detail based on the drawings. FIG. 1 is a block diagram showing an embodiment of a prebusy receiver according to the present invention.

A television high frequency signal (hereinafter referred to as RF signal) is input to the input terminal 1 from an anti-noise (not shown) or the like.

This R signal is supplied to the tuner 2. The chip 2 consists of a frequency converter 3 and a voltage controlled υ11 oscillator (hereinafter referred to as vCO
The frequency converter 3 converts the input RF signal into an intermediate frequency signal (hereinafter referred to as IF signal 2) using a local oscillation signal from the vCO4.
A local oscillation frequency is generated according to a tuning voltage supplied from a PIL unit 5, which will be described later. The IF multiplied signal is supplied to the intermediate frequency circuit (hereinafter referred to as IF open circuit) 6. 1
The F circuit 6 detects the phase of the IF multiplied signal.
Detects the shift in the transmission station frequency and outputs the detected signal E' (AFT signal)
is output to a tuning microcomputer (hereinafter referred to as a tuning microcomputer) 7.The IF circuit 6 amplifies the signal by IF times and detects it to obtain a video signal, which is then sent to a display circuit 8 and a broadcast signal determination circuit 9. The broadcast signal determination circuit 9 determines whether or not a broadcast signal exists by, for example, determining whether or not a horizontal synchronization signal is formed in the input signal, and outputs a determination signal. It is designed to be output to the channel selection microcomputer 7.

The channel selection microcomputer 7 provides control data based on user operations to the programmable waveguide 10 of the PLL section 5. This PLL section 5 is composed of a programmable deep pipe 10, a reference oscillator 11, and a phase detector 12. Bu O
The grammable divider 10 is a variable frequency divider that divides the frequency of the local oscillation signal from the vCO 4 based on control data from the channel selection microcomputer 7. The reference oscillator 11 is composed of a crystal oscillator and generates a reference oscillation frequency. Phase detector 1
2 performs a phase comparison between the reference oscillation output and the frequency-divided output of the programmable waveguide 10, and operates to lower the output when the phase of the frequency-divided output is ahead of the phase of the reference oscillation output. The output of the phase detector 12 is supplied to vCO4 as a tuning voltage, and the oscillation frequency of vCO4 changes based on the tuning voltage. The P L 1 section 5 composed of these vCO4, the programmable waveguide 10, the reference oscillator 11, and the phase detector 512 allows the V
The oscillation output of CO4 is based on the III mu data of the channel selection microcomputer 7. In this way, it becomes possible to set the local oscillation frequency of vCO4 to a desired frequency. Incidentally, the adjustment is made by the υ1t11dake uAFT signal of the channel selection microcomputer 7, and automatic fine adjustment of the local oscillation frequency is performed.

The channel selection microcomputer 7 is provided with an input device (not shown).
- Outputs music composition data based on key operations such as the tome-7 key. In other words, the channel selection microcomputer 7 is arranged so that the A-tome operation mode is designated by operating the auto memory key, and the control data is sequentially changed. As a result, the oscillation frequency of vCO4 changes sequentially,
Chu J2 is designed to sequentially receive RF signals of different channels. Further, when the judgment signal from the broadcasting 4ir' 3 judgment circuit 9 indicates that the reception channel is a signaled channel, the channel selection microcomputer 7 stores data indicating the channel number in the memory. 13
At the same time, the display data of this channel number is output to the display circuit 8. Display circuit 8
inputs the output of the IF circuit 6 and outputs a video signal for display to a display section (not shown), and also displays a display showing the channel number of the signaled channel based on the display data of the channel selection microcomputer 7 on the display screen of the display section. It is designed to be displayed on-screen.

Next, the operation of the television receiver configured as described above will be explained with reference to FIGS. 2 and 3. FIG. 2 is an explanatory diagram showing a display example of the display screen during the auto memory operation mode, and FIG. 3 is a clear diagram showing a display example of the signaled channel number.

When the user operates the auto memory key, the channel selection microcomputer 7, for example, outputs control data based on the lowest channel number (hereinafter referred to as the lowest channel number) to the PLL.
output to section 5. Then, the oscillation frequency of vCO4 becomes the frequency for receiving the lowest channel, and the signal of the lowest channel of the RF communication station from the input terminal 1 is converted by the frequency converter 3 into an I-to signal. Note that if there is a deviation in the frequency of the I signal, the AF output from the IF circuit 6
By the T signal, the 1ilJII] data of the tuning microcomputer 7 is adjusted, the oscillation frequency of the VCO 4 is adjusted, and the I
The frequency of the F signal is a constant value.

A broadcast signal determination circuit 9 determines whether a received channel includes a broadcast signal from the output of the IF circuit 6, and outputs a determination signal to the channel selection microcomputer 7.

The channel selection microcomputer 7 stores the memory 1 when the judgment signal indicates that the received channel contains a broadcast signal.
3 stores data indicating the lowest channel number, and provides display data indicating the lowest channel number to the display circuit 8.

Next, the channel selection circuit 7 outputs υ+W data for receiving the next channel. Tuner 2 selects the next channel from the RF communication station from input terminal 1 and transmits the IF signal to I.
Output to F circuit 6. In this case as well, the broadcast signal determination circuit 9 determines whether or not the received channel includes a broadcast signal, and outputs a determination signal to the channel selection microcomputer 7. When the judgment signal indicates that the receiving channel is a signaled channel, the channel selection microcomputer 7 stores data indicating the channel number of the receiving channel in the memory 13, and displays this channel number on the display circuit 8. Output data.

Thereafter, the same process is repeated. As a result, data indicating the signal channel numbers from the lowest channel to the highest channel is stored in the memory 13, and display data indicating the number of the signal channel is provided to the display circuit 8.

As shown in FIGS. 2 and 3, the display circuit 8 displays a reception channel display 1 showing reception channels on the display screen 14.
5 and a right signal channel number display 1G indicating the right signal channel. In the auto memory operation mode, the display circuit 8 sequentially displays the signaled channel numbers indicated by the display data every time display data is provided from the channel selection microcomputer 7. In FIG. 2, it is shown that at least the 2nd channels 4.6, 9, 11, and 13.22 are signaled channels, and currently the 23rd channel
It shows that the channel is being received.

In addition, after the auto memory operation mode ends, if the signaled channel display is specified by the user's operation,
The channel selection microcomputer 7 reads data stored in the memory 13 and provides the display circuit 8 with display data of all signaled channels. In this way, as shown in FIG. 3, the display circuit 8 displays the reception channel display 15 and signal channel number display 16 on the display screen 14 at once.

In this way, in this embodiment, it is determined whether or not the received channel includes a broadcast signal, and data indicating the channel number of the signaled channel is stored in the memory 13, and display data of this channel number is The signal is output to the display circuit 8, so that the user can easily grasp the signal channels other than the receiving channel. Also, the data stored in the memory 13 and the reception channel during the auto-memory operation mode can be easily known.

[Effects of the Invention] As described above, according to the present invention, a user can easily know all channels containing broadcast signals without performing complicated operations.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the television receiver according to the present invention, Fig. 2 is an explanatory diagram showing an example of the display screen in the automatic operation mode, and Fig. 3 is the right signal channel display. It is an explanatory view showing an example of a display. 2... Tuner, 5... PLL section, 6... IF circuit, 7... Tuning microcomputer, 8... Display circuit, 9...
-Broadcast signal determination circuit, 13...memory.

Claims (1)

[Scope of Claims] A tuner capable of selecting a plurality of channels; a broadcast signal determination circuit that determines whether a broadcast signal exists in a channel selected by the tuner and outputs a determination signal; and the tuner. control means for sequentially selecting each channel and outputting data indicating the selected channel when the determination circuit determines that the selected channel includes a broadcast signal; and storing output data of the control means. What is claimed is: 1. A television receiver comprising: a memory for storing a broadcast signal; and a display section for displaying a channel containing a broadcast signal based on data stored in the memory.