JP2001268463A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a television receiver for automatically performing character display by the language character of the location no matter which of the first area of using one of the two kinds of the language characters allocated with a common control bit and the second area of using the other it is placed in. SOLUTION: At the time of automatic tuning, station name information is sampled in a teletext information sampling part 5. The sampled station name information is supplied to a CPU 13 by a teletext decoder 6. In a ROM 15 inside the CPU 13, information for indicating whether a broadcasting station belongs to Eastern Europe or Western Europe is stored. The CPU 13 collates the station name information with the information stored in the ROM 15, discriminates which one of the first area and the second area the area to which the broadcasting station belongs is and automatically turnes the language character to setting for the first area or the setting for the second area on the basis of a discriminated result.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver for receiving and demodulating a television signal in which teletext information including broadcast station identification information and text information is multiplexed.

[0002]

2. Description of the Related Art A television receiving apparatus for receiving teletext information has a structure which can be used for both a first area and a second area.
As shown in (b), the determination terminal 5 of the CPU 51 in the apparatus
By applying High or Low to No. 2, some are fixed to either the first area or the second area before being shipped. FIG. 5 shows a case of a television receiver for Europe. As can be seen from this figure, High or Low is applied to the determination terminal 52 depending on whether the determination terminal 52 is connected to the power supply (5 V) or GND via the resistor 53,
When it is Low, it becomes a receiver for Eastern Europe (EAST), and when it is High, it becomes a receiver for Western Europe (WEST).

FIG. 4 shows a relationship between language characters when a European television receiver displays teletext information on a screen and control bits for controlling which language character is adopted. The control bits are 3 bits and are included in the transmitted teletext information. Any of eight types of language characters can be indicated by the 3-bit information. Here, the receiving device is Western Europe (WE
When (0, 0, 0) is received as a control bit in the case of setting for (ST), character dot pattern data is generated by comparing the received character information with a code table of English characters (English). . On the other hand, if (0,0,0) is received as a control bit in the case of setting for Eastern Europe (EAST), the received character information is converted to Polish characters (Po
), character dot pattern data will be generated.

[0004]

In a conventional television receiver of this type, as described above, whether the signal is for Western Europe or Eastern Europe is fixed depending on the presence or absence of the resistor 53. When the device is brought to Eastern Europe, when the control bit (0, 0, 0) is received, the character code generated as a Polish character (Polish) is compared with the English character code (English) code table to display the character dot. Since pattern data is generated, there is a problem that character blur occurs.

[0005] In view of the above circumstances, the present invention can be placed in either a first area using one of two types of language characters to which a common control bit is assigned and a second area using the other. It is an object of the present invention to provide a television receiver in which character display in a local language character is automatically performed.

[0006]

In order to solve the above-mentioned problems, a television receiver according to the present invention receives a television signal in which teletext information including broadcast station identification information and character information is multiplexed. A screen of received character information using either the first region-side language character or the second region-side language character according to the setting for the first region or the setting for the second region. In a television receiver configured to perform display, detecting means for detecting the broadcast station identification information, wherein the area to which the broadcast station belongs is a first area or a second area based on the detected broadcast station identification information. Determining means for determining whether the area is the first area, and automatically determining the first area based on the determination result.
Automatic setting means for setting for the second area or setting for the second area.

With the above configuration, even if different language characters are assigned to common control bits for each area, the receiving apparatus can determine the location based on the broadcast station identification information received at the location. Is the first area or the second
And automatically selects the language character used in that area.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

An antenna 1 converts a received broadcast wave into an electric signal and supplies the electric signal to a tuner 2 via an antenna feed line.
The signal input section of the tuner 2 includes a circuit for matching the input impedance between the antenna feed line and the amplification section, various trap circuits for eliminating radio waves that interfere, an amplification section for amplifying the input signal, and the like. Further, the tuner 2 mixes the signal of the desired channel and the local oscillation signal to generate an intermediate frequency signal (IF). The local oscillation signal is output from the voltage synthesizer. The voltage synthesizer is equipped with a variable capacitance diode whose capacity changes according to an applied voltage (tuning voltage). The voltage synthesizer is variable according to a signal of a desired channel so that an intermediate frequency signal adopted in Europe is output. The generated local oscillation signal is generated.

The detection circuit 3 extracts a PAL format color television signal (luminance signal, carrier chrominance signal, synchronization signal) by detecting an intermediate frequency video signal.
The video signal processing circuit 4 performs processing such as generating a color subcarrier, demodulating a color difference signal from the carrier color signal using the color subcarrier, and generating a color signal (R, G, B) from the color difference signal. The drive circuit 8 amplifies the chrominance signal and the luminance signal to a size necessary for driving the picture tube 9, extracts a synchronization signal from a color television signal, and separates the signal into a vertical synchronization signal and a horizontal synchronization signal. It is given to the picture tube 9.

The teletext information extracting section 5 performs a process of extracting teletext information (superimposed on scanning lines from line 6 to line 22) included in the color television signal. The teletext decoder 6 decodes the extracted teletext information, generates a character display signal (RGB signal) and supplies it to the mixing circuit 12, and supplies control bits and station name information to the CPU 13. As the station name information, identification information, which is called a network identity and is assigned to each broadcasting station, is used. The network identity is, for example, a line (R) called broadcast service data of well-known teletext information.
OW30). For example, in Eastern European broadcasting stations (Czech Republic, Hungary, Poland, etc.), as shown in FIG.
1 "" 4202 "..." 4802 ", station name information (8/30 format 1 (Europe Teletext format)) is given.

The mixing circuit 12 includes a teletext decoder 6
And the character display signal (such as the number of the channel number) output from the character generator 7 to the video signal output from the video signal processing circuit.

The remote control transmitter 10 is a transmitter for sending a command to a television receiver. When a key (not shown) provided on the remote control transmitter 10 is operated, a signal light (remote control signal) indicating a command corresponding to the key is transmitted from a light emitting unit (not shown). The remote control light receiver 11 receives the signal light, converts the signal light into an electric signal, and supplies the electric signal to the CPU 13.

The CPU 13 stores the station name information received from the teletext decoder 6 in the RAM 14 in the CPU 13.
To be stored. The ROM 15 in the CPU 13 stores operation control programs and language information (see FIG. 4) for control bits. Further, the ROM 15 stores a broadcast station that supports teletext, station name information (broadcast station identification information), character data of each language character, and information indicating whether the broadcast station belongs to Western Europe or Eastern Europe. Is stored. For example, if “0” is Eastern Europe and “1” is Western Europe, “4201”, “4202”.
By assigning “0” to all of “802”, when the CPU 13 receives, for example, “4802” as station name information from the teletext decoder 6, the CPU 13
By recognizing "0" assigned to the fifteen station name information "4802", it can be determined that the broadcast station belongs to Eastern Europe. When the CPU 13 determines that the broadcast station is Eastern Europe, the CPU 13 writes “0” to the Eastern / Western European flag in the nonvolatile memory 16, and when it determines that the broadcast station is Western Europe, writes “1” to the flag. .

When the CPU 13 determines that the region to which the broadcasting station belongs is Eastern Europe, and receives, for example, "0, 0, 0" as a control bit included in the teletext information, the CPU 13 transmits Polish characters (Polish). The character data is provided to the teletext decoder 6 (see FIG. 4). Therefore, in this case, the teletext decoder 6 uses the Polish character (Poli) based on the character information given from the teletext information reading unit 5.
sh), and outputs a character display signal (RGB signal) to the mixing circuit 12.

Also, at the time of channel presetting, the CPU 13 executes an auto tuning process by gradually changing the tuning voltage of the tuner 2 from the VHF band to the UHF band.
The tuning voltage data at the tuning point is written in the nonvolatile memory 16. In this embodiment, it is determined whether the receiving device is located in Eastern Europe or Western Europe during the auto-tuning process, and a language character is selected.

FIG. 3 is a flowchart showing the auto-tuning process and the region determining process. The initial setting of the region is set to Western Europe. First, the tuning voltage is set to an initial value (step S1). Next, it is determined whether or not there is a tuning point (step S2). If there is no tuning point, the tuning voltage is increased (step S9), and the process returns to step S2 to determine whether or not there is a tuning point. If there is a tuning point, a process for determining station name information is executed (step S3). Next, it is determined whether or not the station name information has been determined (step S4). If the station name information can be determined, it is determined whether the broadcast station is an Eastern European broadcast station (step S5). If it is determined that the station is an Eastern European broadcasting station, the region is set to Eastern European (step S6).
That is, “0” is written to the Eastern / Western European flag in the nonvolatile memory 16. Further, the tuning voltage data is written into the nonvolatile memory 16 (Step S7). On the other hand, if the station name information cannot be determined or if it is determined that the station is not a broadcast station in Eastern Europe, the process proceeds directly to step S7. After writing the tuning voltage data in step S7, it is determined whether the tuning voltage has reached a predetermined value (step S7).
8) If not reached, proceed to step S9 to increase the tuning voltage and proceed to step S2, while if reached, end the auto-tuning process.

After the auto-tuning process, when the teletext is viewed, the contents of the Eastern / Western European flag are read from the non-volatile memory 16. When the teletext is "0", of the Eastern European language characters specified by the control bit, The character data is read from the ROM 15 and given to the teletext decoder 6. When the character data is "1", the character data of the language character specified by the control bit among the Western European language characters is read from the ROM 15 and read. Given to. That is,
Even if different language characters are assigned to common control bits in Eastern and Western Europe, based on the station name information received at the place where it is located, it is automatically determined by determining whether the place is Western or Eastern Europe. The language character used in the place is selected. Therefore, it is not necessary to provide the television receiver with a resistor for discriminating the destination. Even if the television receiver is installed in Western Europe, it is possible to have it in Eastern Europe, or vice versa. Even if you do, character display will be performed with appropriate language characters.

In the above embodiment, when at least one Eastern European broadcasting station is detected, East European language characters are assigned. However, the present invention is not limited to this. Eastern European broadcasting stations and Western European broadcasting stations are assigned. If stations are mixedly detected, language characters in the area where the number of detected broadcast stations is larger may be assigned. Although the case where the area to which the broadcasting station belongs is Western Europe or Eastern Europe has been described, the present invention can be applied to a case where the broadcasting station belongs to another area. Further, the configuration in which the tuner 2 includes the voltage synthesizer has been described, but a tuner of a frequency synthesizer type may be used.

[0020]

As described above, according to the present invention, either of the first area using one of the two types of language characters to which a common control bit is assigned and the second area using the other is used. Even if it is placed, there is an effect that character display in the local language character is automatically performed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a television receiver according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing station name information given to each broadcasting station in Eastern Europe.

FIG. 3 is a flowchart showing a process at the time of auto tuning according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram showing the relationship between control bits and language characters in Eastern Europe and Western Europe.

FIG. 5A is a circuit diagram showing a connection configuration of an EAST / WEST discrimination terminal in a conventional television receiver, and FIG. 5B is a circuit diagram showing an input to the terminal and an EAST / WEST signal;
FIG. 9 is an explanatory diagram showing a mode of WEST determination.

[Explanation of symbols]

 Reference Signs List 1 antenna 2 tuner 3 detection circuit 4 video signal processing circuit 5 teletext information extraction unit 6 teletext decoder 7 character generator 13 CPU 14 RAM 15 ROM 16 nonvolatile memory

Claims (3)

[Claims] 1. A television signal in which teletext information including broadcast station identification information and text information is multiplexed,
A screen display of the received character information using either the first region-side language character or the second region-side language character according to the setting for the first region or the setting for the second region In the television receiver configured to perform the above-mentioned, the detecting means for detecting the broadcast station identification information, and the area to which the broadcast station belongs is the first area or the second area based on the detected broadcast station identification information. A television receiver comprising: a determination unit for determining whether a region is set; and an automatic setting unit for automatically setting a setting for the first region or a setting for the second region based on the determination result. apparatus. 2. The television receiving apparatus according to claim 1, wherein the broadcast station identification information is detected during auto tuning, and the area to which the broadcast station belongs is determined to be the first area based on the detected broadcast station identification information. Or a second area, and the television receiver is configured to automatically set the first area or the second area based on the determination result. . 3. The television receiver according to claim 1, wherein the first area is Western Europe,
The television receiver, wherein the second area is Eastern Europe.