JPH10294903A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allocate a channel number suitable for a using area by discriminating an area to which the broadcasting channel of detected television signals belongs and preferentially allocating the channel number to the broadcasting channel of a corresponding area. SOLUTION: A CPU 22 sets a tuning voltage to an initial value and starts the search of a turning point. A data sampling circuit 20 samples teletext data superimposed on video signals and supplies them to the CPU 22 and the CPU 22 detects an identifier included the teletext data and discriminates the broadcasting channel of received television signals. The CPU 22 sets a first flag 38a formed in a RAM 38 when even one of the broadcasting channels of a broadcasting group belonging to England is detected and sets a second flag 38b when even one of the broadcasting channels of the broadcasting group belonging to Ireland is detected. Then, the channel number is allocated to the detected broadcasting channel for each nation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and more particularly to a television receiver for searching for a tuning point and assigning a channel number to a detected broadcast channel.

[0002]

2. Description of the Related Art A conventional television receiver of this type shipped to the UK or Ireland has a switch which is turned on / off in accordance with a shipping destination. The channel number was assigned to the broadcast channel by the method. That is, if the switch is on, it is determined that the shipping destination is the United Kingdom, and channel numbers “1” to “5” are assigned to the broadcast channels of the five major broadcast stations (broadcast groups) in the United Kingdom. A channel number "6" or later is assigned to a channel. If the switch is off, it is determined that the shipping destination is Ireland, and channel numbers “1” and “2” are assigned to the broadcasting channels of the two main broadcasting stations located in Ireland, and “2” is assigned to the other broadcasting channels. Channel numbers after 3 "were allocated.

[0003]

However, in such a conventional technique, when a television receiver shipped to the UK is used in Ireland, channel numbers "1" to "5" are broadcasted in the UK at the time of presetting. As a result, channel numbers "1" to "5"
However, there is a problem that the channel becomes an empty channel.

[0004] Therefore, a main object of the present invention is to provide a television receiver capable of assigning a channel number suitable for a use area.

[0005]

SUMMARY OF THE INVENTION According to the present invention, in a television receiver having a channel table in which broadcast channels and channel numbers are associated, a plurality of flags and tuning points corresponding to a plurality of regions are searched. Determining means for determining the area to which the broadcast channel of the detected television signal belongs, setting means for setting a flag of the area determined by the determining means, and a channel for a broadcast channel of a specific area corresponding to the set flag. Characterized by comprising an assigning means for assigning the number preferentially,
It is a television receiver.

[0006]

The CPU detects an identifier of a broadcast channel included in a television signal received at the time of searching for a tuning point, and determines an area to which a broadcast station belongs based on the identifier. Subsequently, the CPU sets a flag corresponding to the determined area, and after the search is completed, preferentially assigns a channel number to a broadcast channel in the area corresponding to the set flag.

[0007]

According to the present invention, the channel number is preferentially assigned to the broadcast channel in the area corresponding to the set flag, so that the assignment is suitable for the use area. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0008]

Referring to FIG. 1, a television receiver 10 of this embodiment includes a tuner 14 of a voltage synthesizer type. The tuner 14 selects a desired broadcast channel according to the tuning voltage data from the CPU 22. Accordingly, the high frequency signal of the selected channel is received by the antenna 12, and the intermediate frequency (I
F) A signal is output. This IF signal is sent to the IF detection circuit 1
6 to generate a PAL format video signal. The video signal is processed by the video signal processing circuit 18, and the processed output is added by the adder 30 to the character signal from the character generator 28. The drive circuit 32 drives the CRT 34 in accordance with the output of the adder 30 so that the desired image is
Output from T34. On the other hand, the data extracting circuit 20
Is superimposed on lines 6 to 22 of the video signal and UK. Teletext data according to the Teletext system is extracted and provided to the CPU 22.

At the time of channel presetting, the CPU 22 gradually changes the tuning voltage of the tuner 14 from the VHF band to the UHF band, and the identifier (I) included in the teletext data supplied from the data extracting circuit 20 at that time.
Based on D), as shown in FIG. 4A to FIG. 4D or FIG. 5, channel numbers 1, 2, 3,...

More specifically, referring to FIGS. 9 to 15, the CPU 22 first determines in step S1 whether a menu key 24a provided on the remote controller 24 as shown in FIG. If "", step S3
The control data storage area 40 formed in the ROM 40
The control data read from b is supplied to the character generator 28, and an automatic tuning / sorting menu as shown in FIG. CPU2
Next, in step S5, it is determined whether or not the volume up key 24b of the remote controller 24 has been pressed, and "NO"
If so, it is determined in step S7 whether or not 5 seconds have elapsed. If "YES", the process is terminated assuming that the menu has not been selected, but if "NO", the process returns to step S5. If the volume up key 24b is pressed before 5 seconds have elapsed, the CPU 22 determines that automatic tuning / sorting has been selected, sets the tuning voltage to an initial value in step S9, and starts searching for a tuning point.

That is, it is determined whether or not there is a tuning point in step S11. If "NO", the tuning voltage is increased by a predetermined value in step S15, and the process returns to step S11. Whether there is a tuning point is determined by the data sampling circuit 20.
Is determined based on whether or not teletext data has been output from. When the teletext data is given, the CPU
In step S13, an ID (identifier) included in the teletext data is detected, and the broadcast channel of the received television signal is determined based on the detected ID. More specifically, the ROM 40 stores, in the ROM 40, an I / O in which a broadcast channel and an ID are associated with each other.
A D table 40a is formed, and the CPU 22 determines the broadcast channel by comparing the ID table 40a with the detected ID.

Then, the CPU 22 determines that the determined broadcast channel is the BBC1 group, the BBC2 group, the ITV
Group, CH4 group or CH5 group, and if "YES", step S1.
9, the first formed in RAM 38 and corresponding to the UK
The flag 38a is set, and the routine goes to Step S25. On the other hand, if “NO” in the step S17, the CPU 22
Indicates that the broadcast channel determined in step S21 is RT
It is determined whether it belongs to the E1 group or the RTE2 group, and if "YES", the second flag 38b corresponding to Ireland is set in a step S23, and the process shifts to a step S25. That is, each broadcast group (broadcast station) has one or more broadcast channels,
The first flag 38a is set if at least one broadcast channel of a broadcast group belonging to the United Kingdom is detected, and the second flag 38b is set if at least one broadcast channel of a broadcast group belonging to Ireland is detected. If none of the above groups is determined, the process directly proceeds to step S25.

In step S25, the tuning voltage data when the teletext data is detected in step S11 and the ID included in the detected teletext data are stored in the RAM.
The data is written in the work table 38e formed in the file 38. Therefore, as shown in FIG. 3, the related tuning voltage data and ID are written in the work table 38e in association with each other. Subsequently, in step S27, it is determined whether the tuning voltage has reached a predetermined value. If "NO", the process returns to step S15, and the same processing as described above is repeated.
If "YES", it is determined that the search for the tuning point from the VHF band to the UHF band has been completed, and in step S29, the tuning voltage data written in the work table 38e is automatically sorted, and the process ends.

In step S29, the CPU 22 processes a subroutine shown in FIGS. That is, first, in step S31, the first flag 22b and the second flag
It is determined whether or not both of the flags 22c are set. If "YES" here, it is determined that the broadcast channels in both the United Kingdom and Ireland have been detected, and step S
33 and subsequent processes are executed, and the RTE1 group, RTE2
Group, BBC1 group, BBC2 group, IT
V group, CH4 group, CH5 group, SKY
Channel numbers are assigned to detected broadcast channels in the order of groups, that is, for each country.

In step S33, the CPU 22
The count value m of the counter 38c formed in M38 is initialized, that is, set to "1", and then, in step S3
5, the m-th ID and I from the top of the work table 38e
It is determined whether the ID of the RTE1 group stored in the D table 40a matches. If "NO" here, the counter 22e is incremented in a step S37, and a count value m = n (m ≦ n) in a step S39.
Is determined. If "NO", the process returns to the step S35. Therefore, the RTE1 group I
D and all IDs held in the work table 38e
Is compared. If an ID matching the ID is detected, the tuning voltage data related to the ID is stored in the channel table 3 in the RAM 38 in step S41.
8f is stored in the data area corresponding to the channel number "1", and in step S43, the matched ID in the work table 38e and the tuning voltage data related thereto are erased.

In this embodiment, the ID “353” of RTE1 is used.
Since “1” is held in the work table 38e as shown in FIG. 3, the channel number “1” is allocated to the tuning voltage data related to “3531”, and “3531” and the related data are assigned from the work table 38e. Note that “n” is the number of IDs held in the work table 38e,
If the TE1 ID is not found in the worktable,
It is determined "YES" in the step S39, and as a result, the data area corresponding to the channel number "1" is set as an empty area. The processing of steps S33 to S43 is R
It is executed for each group in the order of the TE2 group, the BBC1 group, the BBC2 group, the ITV group, the CH4 group, the CH5 group, and the SKY group. If a desired ID is found, tuning voltage data related to the ID is stored in the channel number “2”. "8" are written in the data areas corresponding to "8". Therefore, when the processing up to the SKY group is completed, the channel table 38f stores the channel numbers “1” to “4” as shown in FIG.
In correspondence with each of “8”, the tuning voltage data of one of the broadcasting groups belonging to Ireland and the UK and the SKY group is written. Since the SKY group broadcasts on a communication satellite, the SKY group does not belong to any of the UK and Ireland, and is not a target of processing in steps S17 and S21.

Thereafter, the CPU 22 sets the count value m to "9" in step S45, detects the earliest tuning voltage data remaining in the work table 38e in step S47, and determines in step S49 the detected tuning voltage data. Is stored in the first free area after the channel number “m”. In step S51, the CPU 22 deletes the ID detected in step S47 and the tuning voltage data corresponding to the ID from the work table 38e.
At 3, it is determined whether or not data remains in the work table. If "YES" here, the process returns to the step S47, and the same process is repeated. If "NO", the process shifts to the step S55. Therefore, the process proceeds to step S5
At the time of shifting to 5, all the tuning voltage data held in the work table 38e has been allocated, and FIG.
The channel table 38f shown in FIG.

In step S55, the CPU 22 determines whether the first flag 22b and the second flag 22c have been set, and returns if "NO".
If "YES", the flow shifts to step S57 to give the predetermined control data stored in the control data storage area 40b to the character generator 28 and display the character information shown in FIG. That is, when step S53 is completed, the channel numbers “1” to “8” of the channel table 38f are allocated in the order of Ireland and the UK as shown in FIG. If it is desired to assign "8" in the order of UK and Ireland, the operator is instructed to press the channel up key 24c of the remote controller 24. In response to this, if the operator presses the position up key 24c, the CPU
At step S59, "YES" is determined at step S59, and at step S63, the tuning voltage data to which the channel numbers "7" and "8" are allocated is saved to the save area 38d of the RAM 38, and at step S65, the channel numbers "1" to
Channel numbers "3" to "8" are assigned to the tuning voltage data to which "6" is assigned. Then, step S67
The tuning voltage data saved in the save area 38d is assigned to channel numbers "1" and "2", and the routine returns. That is, the CPU 22 changes the channel number for each country. Note that the operator operates the channel up key 2 until 5 seconds elapse after the character shown in FIG. 8 is displayed.
If 4c is not pressed, the CPU 22 determines "YES" in the step S61, and returns.

If "NO" is determined in the step S31 shown in FIG. 11, the CPU 22 proceeds to the step S69 shown in FIG.
To determine whether only the first flag 22b is set. If "YES" here, it is determined that only the broadcast channels belonging to the United Kingdom have been detected at the time when the tuning point search is completed, and the process shifts to step S71. In steps S71 to S81, the same processing as in steps S33 to S43 is performed on the BBC1 group, and thereafter the same processing as in steps S71 to S81 except that the channel numbers are changed for the BBC2 group, the ITV group, the CH4 group, the CH5 group, and the SKY group. I do.
As a result, when the processing for the SKY group is completed, the channel numbers “1” to “6” of 38 f in the channel table are changed to the above-mentioned 6 as shown in FIG.
It is allocated to the tuning voltage data of one of the broadcast channels belonging to each of the two groups. Thereafter, the count value m is set to "7" in step S83, and the process proceeds to step S12. Therefore, channel table 3
The channel number after “7” of 8f is the work table 38.
The tuning voltage data remaining in e is allocated in order from the top.

If "NO" in the step S69, FIG.
In step S85 shown in FIG. 5, it is determined whether only the second flag 22c is set. If "YES" here, it is determined that only the Irish broadcast channel is detected at the time when the tuning point search is completed, and first, in steps S89 to S99, RTE1 is subjected to step S33.
The same processing as that of S43 is performed, and then the same processing is performed for RTE2. Then, the CPU 22 determines in step S101
Then, the count value m is set to "3", and the routine goes to Step S47. Therefore, as shown in FIG. 4D, the channel numbers “1” and “2” are assigned to the tuning voltage data of RTE1 and RTE2, respectively, and the channel numbers “3” and thereafter remain in the work table 38e. Assigned to the tuning voltage data.

If "NO" in the step S85, the count value m is initialized in a step S87, that is, "1".
And the process moves to step S47. That is, if “NO” in the step S85, since neither the UK nor Ireland broadcast channels are detected at the time when the search of the tuning point is completed, the tuning voltage data held in the work area is “1”. The count value m is set to "1" in order to sequentially assign subsequent channel numbers. Therefore, the channel table shown in FIG. 5 is formed.

As described above, the first flag 38a and the second flag 38a
Since the channel number allocation method is determined according to the respective set / reset states of the flag 38b, the channel number suitable for the country where the television receiver 10 is used can be allocated. When broadcast channels of a plurality of countries are preset, the assignment of channel numbers can be changed for each country according to the user's preference.

Although this embodiment has been described using a voltage synthesizer type tuner, it goes without saying that a frequency synthesizer type tuner may be used.
Further, in this embodiment, the description has been made using the television receivers used in the United Kingdom and Ireland, but the present invention can also be applied to television receivers used in other countries or regions.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is an illustrative view showing a table stored in a ROM in advance;

FIG. 3 is an illustrative view showing a table formed in a RAM;

FIG. 4 is an illustrative view showing a table formed in a memory;

FIG. 5 is an illustrative view showing a table formed in a memory;

FIG. 6 is an illustrative view showing a remote controller;

FIG. 7 is an illustrative view showing a character displayed on the CRT;

FIG. 8 is an illustrative view showing a character displayed on a CRT;

FIG. 9 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 10 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 11 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 12 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 13 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 14 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 15 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Television receiver 18 ... Video signal processing circuit 20 ... Data extraction circuit 22 ... CPU 26 ... Memory 28 ... Character generator

Claims (8)

[Claims] 1. A television receiver having a channel table in which broadcast channels and channel numbers are associated with each other. A television signal detected by searching for a plurality of flags and tuning points corresponding to a plurality of regions, respectively. Determining means for determining an area to which the broadcast channel belongs; setting means for setting a flag of the area determined by the determining means; and preferentially giving the channel number to the broadcast channel in a specific area corresponding to the set flag. A television receiver, comprising: allocating means for allocating. 2. The television signal includes an identifier of the broadcast channel. The determination unit detects the identifier from the television signal, and determines an area based on the identifier detected by the detection unit. Including means for determining the area
The television receiver according to claim 1. 3. A work for creating an identifier table in which the identifiers of the broadcast channels belonging to the plurality of regions are stored in advance, and a work table in which the identifier detected by the detecting means and the tuning data at the time of detection are associated with each other. A channel table creating unit for creating the channel table in which the channel number is assigned to the tuning data of the broadcast channel in the specific area based on the identifier table and the work table. including,
The television receiver according to claim 2. 4. A comparison means for comparing a specific identifier of the broadcast channel in the specific area included in the identifier table with an identifier included in the second table, and a comparison result of the comparison means. 4. The television receiver according to claim 3, further comprising a writing unit that writes the tuning data to the channel table according to the following. 5. The television receiver according to claim 4, wherein when there are a plurality of said specific areas, said comparing means performs a comparison for each area. 6. A suggestion means for suggesting a change of the channel number when tuning data of broadcast channels in two or more areas is allocated to each of the channel numbers, an instruction key for instructing the change, and the operator 6. The apparatus according to claim 5, further comprising a change unit configured to change the channel number for each area when the instruction key is operated by the user.
The television receiver as described. 7. A broadcasting station has one or more broadcasting channels, and said comparing means performs comparison for each broadcasting station.
7. The comparison according to claim 4, wherein the comparison is performed for another broadcast station when the comparison result indicates a match or when all the comparison results for any of the broadcast stations indicate a mismatch. Television receiver. 8. The writing means writes the tuning data into a data area corresponding to a predetermined channel number in the channel table when the comparison result indicates a match, and writes the tuning data when the comparison result indicates a mismatch. The television receiver according to any one of claims 4 to 7, wherein is a free area.