JPS6187412A - Television receiver - Google Patents

Abstract

PURPOSE:To avoid a trouble based on an offset data by forming a data representing a reception channel and a data representing the offset of said reception channel in a TV receiver of the frequency synthesizer system. CONSTITUTION:The table OFST for data representing the reception channel and representing the offset of said reception channel is formed in a nonvolatile memory 24. A channel is selected based on said table OFST. That is, a mode switch 32 is thrown to the preset position to form the table OFST in the memory 24. Then the switch 32 is thrown to the position of the reception side, then a picture during the reception is displayed on a picture tube 16 and the table OFST is superimposed. Then the trouble based on the offset data is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a television receiver equipped with a frequency synthesizer type tuner.

[Conventional technology]

In a frequency synthesizer type television receiver, the local oscillation circuit of C is configured by a PLL, and when a channel selection key is pressed, the data corresponding to the channel of the pressed key is retrieved from the memory, and that data is transferred to the PLL. , to select the desired channel.

However, among television broadcast waves, CATVs, VTRs, personal computers, RF video outputs of television games, etc., there are some whose carrier frequencies deviate from the normal frequencies, that is, they have an offset.

Therefore, as a TV reception +18 of the Shin-7 "Sizer method",
Some have a fine tuning function. Zunawaji, when presetting channels, select a desired channel and operate the fine tuning key to perform fine tuning, and the data of that channel and the data of offset 9 are stored in the memory. When selecting a channel, when the channel selection key is pressed, channel data and offset amount data are retrieved from the memory and set to P L l. Therefore, according to a television receiver having this fine tuning function,
Even if there is a signal with an offset (such as a broadcast wave), you can tune in correctly and select the channel by simply pressing the channel selection key (for example, r K
V-18XR3 Instruction Manual” published by Sony).

By the way, when such a fine tuning function is provided, it is necessary to store not only the data of the nayan error but also the data of the offset amount in a non-volatile memory, and a large capacity memory is required as the non-volatile memory. Things are demanded. Therefore, in actual products, offset amount data is stored only for, for example, 5 channels.
There is.

However, in 4), generally speaking, there are not many signals with offsets, so there is no problem.

Then, the method of storing the data of offset 9 is to store up to the 5th channel in the order in which it was operated from the beginning, and do not add a reception after the 6th channel "L".
A possible method is to accept the 6th channel, but cancel the 1st channel, and record the offset amount data for the 6th channel here.

[Problem that the invention seeks to solve]

However, in the former method, the user records the data of the 6th channel. Even if you intend to make it Q, it will not be memorized, and with the F&W method, the data stored in the first channel will be erased, so it may be mistaken for a small enemy such as a malfunction, or it may become the cause of trouble. I end up.

[Failure to solve the problem]

A table ST is created in the non-volatile memory (24) with neo data indicating the reception channel and data indicating the offset amount of the reception channel.
A means for selecting the ′ζ channel based on the above is provided.

[Effect]

A table 0FST is formed in a non-volatile memory (24), which includes data indicating the receiving channel and data indicating the offset amount of the receiving channel, and a channel is selected based on this table 0FST.

〔Example〕

In FIG. 1, (101 indicates a video signal system, (11
) is the synthesizer-based tuner. and,
This tuner (11) is a PLL (12) for the local oscillation circuit.
), and according to the channel data (and offset data) set therein, the signal of the corresponding channel is received and converted into a video intermediate frequency signal.

The video intermediate frequency signal from the tuner (11) is supplied to the video detection circuit (14) through the video intermediate frequency amplifier (13) to demodulate the color video signal, and this signal is sent to the video processing circuit (15). The three primary color signals are supplied to a color picture tube (16) to reproduce a color image.

In addition, (20) shows a microcomputer for channel selection control, (21) a CPU, (22) a ROM in which old programs for performing various processes are stored, and (2
3) is RAM for the work area.

(24) is a non-volatile memory for channel selection data and offset amount data, (25) is a CRTC
, (26), and (27) are interfaces, and these circuits (22) to (27) are connected to the CPU (21) through a system bus (29).

Furthermore, channel selection data (and offset amount data) are extracted from the interface (26) and supplied to the -i:PLL (12).
The output of C (25) is supplied to the processing circuit (15).

The interface (27) also has a numeric keypad (31
), mode switch (32), and two sets of up keys (
330), (3411) and down key (33D
) (34D) are connected. In this case, the key (31)
.

(330) to (34D) are non-locking type bush switches, and switch (32) is a 3-position changeover switch. This switch (32) is used for normal reception operation and reception channel preset. It can be called out depending on when the offset amount is preset.

Furthermore, the routine (40) of the flowchart shown in FIG. 2 is also written in the ROM (22).

In addition, the memory (24) contains the number keys "0" to "9" of the numeric keypad (31), the numbers of the channels preset to these number keys, and the channels as shown in Figure 3. A table CIINL with data for selection (data of PLL (12)) is provided, and
As shown in Figure 4, the addresses (numbers) for 5 channels for offset, the number of the channel assigned to this address, and the offset 9 of that channel.
A table 0FST with data is provided.

Then, in My Mini 1 (20), CPU (21)
The routine (40) is executed and the mode [switch (
32) is set to the preset side of the receiving channel, press number key 10 on the numeric keypad (31).
You can preset Ren Ci's channel for each of the 19 sections.

That is, the routine (40) starts at step (41), and then in step (42), when the mode switch (32) is checked and switched to the preset side of the receive channel, the process continues at step (42). 43), and in this step (43), the fifth
The key list KLST shown in the figure is the numeric keypad (3
It is checked whether a table of the numbers of the number keys in step 1) and the numbers of the channels preset to the number keys is displayed. If this key list l-KLST is not displayed, the process proceeds to step (44). ), and in this step (44), the numeric data of the channel preset on the numeric keypad (31) is retrieved from the table CHN L of the memory (24), and the numeric data of the numeric keys of the numeric keypad (31) is retrieved. is formed, these data are supplied to the CRTC (25) and converted into a video signal, and this signal is supplied to the processing circuit (15) to be superimposed on the broadcasting number 113 currently being received. The key list KLST is displayed on the picture tube (16) superimposed on the screen of the broadcast currently being received. And the processing is done in steps (
45).

Moreover, in step (43), the key list K has already been
When LST is displayed, the process directly moves to step (45).

Then, in step (45), the key (31) is pressed.

The outputs of (330) and (33D) are captured,
Next, in step (46), the captured key output is checked, and the keys (31), (330)
, (33D) are not pressed, the process proceeds to step (42). Therefore, the switch (32
) has been switched to the preset side of the reception channel, and the keys (31), (3311>,
(When 330> is not pressed, step (4)
Each time the loop from 2) to (46) is repeated,
At this time, keys (31), (330), (330) are displayed.
) has become a manpower source.

In this state, the key (330) or (33)
When D) is satisfied, the process proceeds from step (46) to step (47), and in this step knob (47),
The key in step (45) is the key (33υ)e, which is the key list displayed on the picture tube (16).
If you press the numeric keys on the numeric keypad (31) on the numeric keypad, the cursor moves one step in two directions (four lines), and if it is the key (330), it moves one step upwards. The process then returns to step (42).

Therefore, when the switch (32) is switched to the precent side of the reception channel, each time the key (330) or (33D) is pressed, the cursor moves up or down on the number key of the key list KLST. You will move one step at a time.

Then, move the cursor over the number of the desired number key, for example number key rlJ, and then move the cursor over the number of the desired number key [1], for example the number of the channel to presen to that number key
To preset a channel, press number keys 1-OJ and 12J of the numeric keypad (31) in sequence corresponding to "2".

Then, by pressing the number key "0", the process moves from step (46) to step (51), in this step (51) the key power of the number key "3" is taken in, and then in step (52). ), rOJ, r3
Data for selecting the third channel is formed from the key input of J, and this data is sent to the PLL (12) through the interface (26), thus ζ, from this point on step (45).

The reception state of the second channel specified in (51) is entered.

The process then proceeds to step (53), and this step (
53) In steps (45) and (51)), data indicating the number of the second channel determined by i1 is formed, and this data is co-fed by 1 to the CRTC (25) to be used as the key lease l-KLST channel. Of the numbers, without
The number key for the channel in the row of number key 11 is changed to 12.

The process then proceeds to step (54) and then to step (52).
, The data for selecting the second channel formed in (53) and the data for skipping the number of channels 712 are written in the column (address) of the numeric key rlJ in the table CIINL, and the process then proceeds to step (42). Return to

Therefore, keys (31), (330), (3
3D), you can preset any channel to each of the number keys on the numeric keypad (31).

Further, when the mote switch (32) is switched to the preset side of the offset 9, the offset amount can be preset for any of the five channels.

That is, when the switch (32) is switched to the preset side of the offset amount, the process proceeds to step (
42) to step (61), and this step (6
In 1), the offset list 0LST shown in Figure 6,
In other words, a table containing the address (number) of the memory (24), the number of the channel whose offset amount is preset at that address, and the number corresponding to that offset cell l-Q is displayed. If it is checked and this list 0LST is not displayed, the process proceeds to step (62), in which the data is retrieved from the table 0FST in the memory (24), and this data is stored in the CRTC (25). This signal is supplied to the processing circuit (15) and is therefore sent to the picture tube (16) as an off-centrist list 0LST which is superimposed on the inner surface of the broadcast currently being received. is displayed.Then, the process proceeds to step (6).
Move on to 3).

Moreover, in step (61), the list 0LS has already been
When T is displayed, the process continues at step (
63).

At step (63), press key (3311)
The output of ~(34D) is taken in, and then the output of step (64D) is taken.
), the captured key output is checked,
If none of the keys (33u) to (34D) are pressed, the process returns to step (42). Therefore, the switch (32) is switched to the reset side of the offset amount, and the keys (330) to (34D)
When is not pressed, step (,12),
The loop of (61) to (64) is repeated each time, and at this time, the offset list 0LST is displayed and the system waits for the input of keys (33U) to (34D).

In this state, the key (330) or (33)
0) is pressed, the process proceeds from step (64) to Resler Sop (65), in which step (65)
The key to step (63) is human power (33U).
This is the list 0LST displayed on the picture tube (16).
・) Then, move the cursor upward by 1 step (4 lines) above the number that points to the 7 F response in memory (24) IJ
r, and if the key is (33D), it is moved down by one step, and then the process goes to step (42).
Return to

Therefore, when the Sui Sochi (32) is switched to the preset side of the offset amount, each time the key (330) or (33D) is pressed, the offset list 0LS
The cursor moves over the number of the address of T or 1 to 10.
Each time you move one stethof.

So, move the cursor over the number of the desired address, for example address "1", and then press the key (340
) or (340).

Then, as the key (34U) or (34D) is pressed, the process moves from step (63) to step (64).
7” (71).
In 1), the numerical data does not indicate the channel that is currently in 2tu, that is, in this case, since the second channel is being received, the data of 12 is in the table 0FS.
It is entered in the column of address "1" of T. The process then proceeds to step (72), and in step (72), if the key input in step (63) is key (340), the data of the offset m that increases the receiving frequency by 7 predetermined steps is determined. This data is sent to the PLL (12) through the interface (26), and if it is the key (34D), data of an offset amount that moves down by l steps is created, and this data is sent to the PLL (12) through the interface (26). P L L , (+
2), and therefore, one step fine tuning is performed on the second channel currently being received at this point. Then, the process proceeds to step (73), and in this step (73), the offset amount is formed into box numeric data and supplied to the CRTC (25), and the offset amount in the address "1" column of the list 0LST is The number corresponding to ST is changed by 71 minutes and displayed, and then in step (74) the data of the offset amount at the address IN of table ST is changed to 1.
The value is increased or decreased by the number of steps, and the process returns to step (42).

Therefore, each time the key (340) or (34D) is operated, fine tuning is performed one step at a time for the channel currently being received, and the offset amount at that time is displayed on the list 0LST. Offset amount data is written to table 0FST.

Therefore, when the switch (32) is on the preset side of the offset amount, the memory (24) address "1"
~I-5'', the channel to which an offset is applied and its offset amount can be freely preset.

Furthermore, when the mode switch (32) is switched to the receiving operation side, a preset channel can be selected using the numeric keypad (31).

That is, when the switch (32) is switched to the receiving operation side, the process proceeds from step (42) to step (81), and in this step (81) it is determined whether I, ST or 0LST is displayed in the list. is checked and displayed, the process proceeds to step (82), where the display of that list is turned off (erased), and then proceeds to step (83), and when it is not displayed, the process continues to step (83). Proceed to.

Then, in step (83), Ten-F--(31
) is captured and then the output of Ste. The retrieved key output is checked at the knob (84), and if no numeric key on the numeric keypad (31) is pressed, the process returns to the steering knob (42). Therefore, the switch (3
2) is switched to the receiving operation side and the numeric keypad (31) is not pressed, step (4)
2) Steps (81) to (84) are repeated until the temperature reaches °C. Also, at this time, one screen displays the strike Kl.
, ST, and 0LST are not displayed.

In this state, when any of the numeric keys on the numeric keypad (31), for example, the 61-character key 10, is pressed, the process proceeds from step (83) to step (84) to step (85). Proceed to table CIINL.

0FST is referenced and in the next step (86),
It is checked whether an offset is preset in the first channel that is preset to the number key 1-Oj specified in step (83), and if it is the first channel, the offset is not preset, so processing is performed. goes to step (87), and this step (8
In step 7), the data for selecting the first channel is retrieved from table C) INL, and then in step (88), the data for selecting the first channel is set in the PLL (12) through the interface (26). . Therefore, from this point on, the numeric keys on the numeric keypad (31)
The reception status of the first channel, which was preset to "0", is entered. The process then returns to step (42).

Furthermore, if an offset is preset for the channel preset to the number key specified in step (83), for example, in the case of the second channel, the process moves to step (91); In step (92), data for selecting the second channel and data indicating the offset amount of the second channel are extracted from tables CIINL and 0FST.
), these station selection data and offset ♀ data are sent to the PLL (12) through the interface (26).
is set to Therefore, from this point on, the numeric keypad (31
) enters the reception state of the second channel pre-centered to the number key "1", and its offset is also corrected and reception is performed. Then, the process is at step (42)
Return to

Thus, according to the present invention, the offset ♀ can also be preset for a channel with an offset, but in this case, especially according to the present invention, the memory (24) Since you can freely preset any channel and its offset amount to the address for offset, you may find that the data of the 6th channel that you intended to store is not stored, or that the data is stored in "■channel 1". The stored data will not be erased, so it will not be mistaken for an accident such as a malfunction, and it will not cause any trouble.

Also, when presetting the offset amount, the offset amount at that point is displayed as a list 0LST, so it is difficult to know whether to press the up key (340) or down key (340) next time. It is easy to preset the offset 9.

In addition, in the above, the formats of tables CHNL and 0FST and the display formats of tables KLST and 0LST are as follows:
It can be changed according to the routine (40). Further, the memory (24) may be of a C-MOS type and backed up by a battery or the like to make it non-volatile.

〔Effect of the invention〕

Assuming table 0FST and °ζ board, memory (24
), you can freely preset any channel and its offset amount for the offset address, so you may find that the data of the 6th channel that you intended to store is not stored, or that the data was stored for the 1st channel. Data will not be lost, and therefore will not be mistaken for an accident such as a malfunction, and will not cause any trouble.

Also, when presetting offset 9, the offset ♀ at that point will be placed in the list 0LST and the °ζ table will be displayed.You will then be asked whether to press the up key (340) or the town key (340). It is easy to know and preset the offset 9.

[Brief explanation of drawings]

FIG. 1 is a system diagram of an example of the present invention, and FIGS. 2 to 6 are diagrams for explaining the same. Figure 1

Claims (1)

[Claims] In a frequency synthesizer type television receiver, a table is created in nonvolatile memory with data indicating the receiving channel and data indicating the offset amount of the receiving channel, and the channel is selected based on this table. TV receiver.