JP3263959B2 - Broadcast receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast receiving apparatus, and more particularly, to a broadcast receiving apparatus capable of easily and quickly selecting a program relating to information to be known.

[0002]

2. Description of the Related Art In a broadcast receiving apparatus, for example, a television receiving apparatus, a radio receiver, a teletext receiving apparatus, etc., conventionally, in order to select a program to be received, a program table is viewed and viewed. The user selects a channel of the broadcast receiving apparatus and sets a program. Thus, it is troublesome for the viewer to operate the channel of the broadcast receiving apparatus and select a program each time. Therefore, conventionally, various channel selection methods have been devised to make it easier to select a program. For example, a specific channel is set in advance to one or a plurality of preset keys and stored in a memory, and a preset key corresponding to a channel corresponding to a program to be received is input, thereby quickly setting the preset channel. There is a way to choose.
Also, there is a method in which one channel selection key is provided, and the channel can be switched each time the channel selection key is input, and a target program is selected by repeating the input of one channel selection key sequentially.

[0003]

However, in such a conventional broadcast receiving apparatus, it is still troublesome to select a program, and there is room for improvement. That is, in such a conventional broadcast receiving apparatus, when only one preset key is provided, when the reception state of the program of the channel selected by the preset key is poor, tuning by the preset key is not performed. No longer,
It was necessary to manually select another channel or program again by using a tuning knob or the like. Also, when a plurality of preset keys are provided, when the reception state of the program selected by one of the preset keys is poor,
It is necessary to input another preset key to select another program. However, in a portable broadcast receiving apparatus, in order to ensure portability, not many preset keys can be provided. Eventually, it was necessary to manually select another channel or program by using a tuning knob or the like. Thus, in the conventional broadcast receiving apparatus, in any case,
There is a problem that it is necessary to manually reselect the channel, which is not only troublesome for the channel selection operation but also makes it impossible to quickly obtain the desired information. In view of the above, the present invention provides a method of broadcasting the target information by automatically selecting a program having a good reception state from the programs broadcasting the target information and automatically selecting the channel. In addition to enabling automatic selection of programs in good condition and prompt access to desired information,
It is an object of the present invention to improve the operability of selecting a broadcast receiving device.

[0004]

According to the first aspect of the present invention,
A plurality of channels broadcast the same type of program content, receiving means capable of receiving each of these broadcast radio waves, and tuning means for extracting a broadcast signal in synchronization with a predetermined radio wave from the broadcast radio waves received by the receiving means Receiving state detecting means for detecting a receiving state of a broadcast signal selected by the tuning means; output means capable of outputting broadcast contents corresponding to the broadcast signal selected by the tuning means; An external operating means for storing, in the storage means, a plurality of sets of a reception channel and a broadcast program as a selected program pair for each item defining a program type; and a selected program pair stored in the storage means. Items, receiving
Communication channel and program
And the selection means, the items of the selected program pair and the reception channel are selected.
When selecting channels and programs, multiple
Items, receiving channels, and programs in the correct order.
Scroll display means for scroll display in reverse or reverse order
When the tuning of the tuning program pairs stored in the storage means, and channel selection instruction means for starting by specifying the item, the item is designated by the channel selection instruction means, the channel selection program corresponding to the item When the start of tuning of a pair is instructed,
If it is determined that the reception state of the selected program is poor according to the detection result of the reception state detection means, the selection means is caused to perform selection of another selected program pair stored for the item. And a tuning control means for selecting a selected program pair having a good reception state as a selected program from the detection result of the reception state detection means. Also, for example, as set forth in claim 2, the receiving means receives a teletext broadcast wave, and the tuning means extracts a teletext signal from the teletext signal received by the receiving means. The reception state detection means detects the reception state of the teletext signal, and the signal processing means decodes the text data from the teletext signal selected by the channel selection means and processes the decoded data to a state where it can be output.

[0005]

According to the present invention, the receiving means receives broadcast waves in which a plurality of channels broadcast the same type of program contents, such as teletext, and the channel selecting means converts the broadcast waves received by the receiving means into a predetermined signal. The broadcast signal is extracted in synchronization with the radio wave.
The signal processing unit performs signal processing on the broadcast signal extracted by the tuning unit so that the broadcast signal can be output, and outputs the broadcast signal by the output unit based on the processed signal. Further, the reception state of the broadcast signal selected by the channel selection unit is detected by the reception state detection unit. On the other hand, according to the operation of the external operation means, the type of the program is changed.
The items to be specified, the receiving channel, and the receiving channel
The respective broadcast programs are selected by the selection means. This
At this time, if necessary, a plurality of items stored in advance,
Scan channels and programs in forward or reverse order, respectively.
Scroll display by crawl display means, for each item,
When a plurality of selected program pairs are stored in the storage means as the selected program pair with the reception channel and the program, and the start of the channel selection of the selected program pair is specified and specified by the channel selection instruction means, The tuning control means causes a plurality of tuned program pairs stored in correspondence with the specified item to be tuned in a predetermined order among the plurality of tuned program pairs registered in the storage means. At this time, if the tuning control means determines that the reception state of the selected program pair is worse than the detection result of the reception state detection means, the other tuning information stored in the storage means for the item. The program pair is selected by the channel selecting means in a predetermined order, and a selected program pair having a good reception state is selected as a selected program from the detection result of the reception state detection means. Therefore, only by designating an item by the channel selection instruction means and instructing the start of channel selection, it is possible to select a channel selection program pair stored in advance in the storage means for each item, and to select the selected channel. When the reception state of the program pair is poor and the reception cannot be performed normally, the programs stored in the storage means corresponding to the item are sequentially received in a predetermined order, and a program having a good reception state is automatically selected. Can be made.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments. 1 to 4 are diagrams showing an embodiment of a broadcast receiving apparatus according to the present invention. FIG. 1 is a block diagram of a broadcast receiving apparatus 1 according to an embodiment of the present invention.
Antenna 2, tuner 3, VIF 4, microprocessor 5, error detector 6, text VRAM 7, CG
8, a display controller 9, a display unit 10, a CPU 11, a memory 12, a keyboard 13, an original signal generator 14, a frequency dividing circuit 15, a power supply device 16, and the like. The broadcast receiving apparatus 1 is capable of receiving a broadcast wave for repeatedly broadcasting a text broadcast or a program of a specific item.

[0007] The power supply device 16 converts power from an external power supply or a battery (not shown) into a predetermined voltage and supplies it to each unit of the broadcast receiving apparatus 1. The power supply 16 has a CP
The control signal from U11 is input, and the power supply 16 starts and stops power supply according to the control signal.

[0008] The broadcast receiving apparatus 1 receives a broadcast wave via its antenna (receiving means) 2, and the broadcast wave received by the antenna 2 is sent to a tuner 3. The tuner (tuning means) 3 is a so-called electronic tuner including a coil, a capacitor, a resistor, and the like, and operates under the control of the CPU 13. The tuner 3 tunes to the radio wave of the frequency specified by the CPU 13, extracts a signal of that frequency,
Output to IF4. The VIF 4 includes a demodulation circuit, a detection circuit, and the like, demodulates and detects a signal input from the tuner 3, and extracts a video signal portion from the signal.

The microprocessor 5 includes an A / D converter, a buffer, a decoder, and the like.
Is converted into a digital signal by the A / D converter and stored in a buffer.
The microprocessor 5 decodes the input signal by the decoder and converts it into character data.

The digital signals stored in the buffer of the microprocessor 5 are sequentially taken out and output to the error detector 6, and the error detector (reception state detecting means) 6
Detects the number of errors therein and outputs the detected number of errors to the microprocessor 5 and the CPU 11.

The text VRAM 7 stores a character position, a size and a character code on the display screen under the control of the CPU 11.

The CG 8 stores a display dot pattern corresponding to a size and a code. When a size and a code are input from the text VRAM 7, the CG 8 outputs the display dot pattern to the display controller 9.

The display controller 9 comprises an input order counter and a display position control circuit. The display controller 9 converts a position signal and a display signal so as to sequentially display a dot pattern sequence input from the CG 8 from the upper left to the lower right of the display screen. Generated and output to the display unit 10. Therefore, the VIF 4, the microprocessor 5, the text VRAM 7, the CG 8, and the display controller 9 function as signal processing means for performing signal processing so that the selected broadcast signal can be output.

The display unit (output means) 10 is a Y-CTR 2
1, an X-CTR 22 and an LCD (liquid crystal display) 23. The LCD 23 includes a Y-CTR 21 and an X-CT.
Driven by the drive signal from R22. Y-CTR2
1 and the X-CTR 22 output to the LCD 23 a drive signal for controlling the designated on / off for each coordinate of the LCD 23 based on the position signal and the display signal input from the display controller 9. The LCD 23 has display pixels arranged in a dot matrix.
1 and are turned on (for example, black display) or turned off (transparent display) by the drive signal from the X-CTR 22.

The CPU (tuning control means) 11 comprises a microprocessor, a ROM, a RAM, and the like.
Stored therein are programs as the broadcast receiving apparatus 1, numbers of selectable channels, frequencies corresponding to the channel numbers, and the like. The RAM is used as a work memory, and the CPU 11 causes the microprocessor to control each unit of the broadcast receiving apparatus 1 according to a program in the ROM, and to function as the broadcast receiving apparatus 1.

Keyboard (registering means and tuning instruction means)
Reference numeral 13 denotes an item selection key 31, a program selection key 32, a channel selection key 33, a power on / off key (ON / OFF) 34, and a forward scroll key 3, as shown in FIG.
5, a return scroll key 36, a registration key 37, and the like, for performing various operations of the broadcast receiving apparatus 1. By using the item key 31, items of a program to be registered or selected in advance (for example, items indicating types of programs such as weather, traffic information, stock price information, news, and cooking) can be selected.
A channel of a broadcasting station can be selected by a channel key 33. A program of each channel can be selected by a program selection key 32, and an on / off key 3
4, the power of the broadcast receiving apparatus 1 can be turned on / off. When each of the item keys 31 is turned on, the scroll keys 35 and 36 are used to store a plurality of items stored in the ROM of the CPU 11 and a memory 1 to be described later.
2 can be scrolled in the normal or reverse order, and when the program key 32 is turned on, the scrollable program can be scrolled. Further, when the channel key 33 is turned on, the selectable channel is changed to the scroll key 3.
It is possible to select a channel by using numbers 5 and 36. Registration key 37
Is used to register a channel or a program in the memory 12 for each item as a selected program pair, as described later.

The memory (program pair storage means) 12 is a RAM
And the like, and stores data for automatic channel selection (data of a channel selection program pair). That is, as shown in FIG. 3, the memory 12 is largely divided into areas for each item, and in each item area, a channel number and a program are stored in association with each other. The registration of items, channels, and programs in the memory 12 can be performed by operating the keyboard 13. That is, when the item key 31 is turned on, only one item is read from the ROM and
Will be displayed. When the displayed item is not the desired item, the scroll keys 35 and 36 are operated to switch the sequentially displayed items, and when the desired item is displayed,
The user inputs the registration key 37 and selects the item. CPU1
When an item is selected, 1 stores the selected item in a predetermined item storage area of the memory 12. A plurality of items can be registered in the memory 12 by sequentially performing the above-described processing for the items to be registered. Similarly, when registering a channel and a program corresponding to each item, a channel key 33 or a program key 32 is input, and a desired channel number or a program is displayed on the LCD 23 with the scroll keys 35 and 36. When the corresponding channel number or program is displayed, the user presses the registration key 37 to select the channel number or program. When an item is selected for the selected channel number or program, the CP
U11 stores the set of the selected channel number and program in the memory 12 as a selected program pair in association with the item. Note that the registration of the channel number and the program is not limited to the above method. For example, an item may be set first, and the channel number and the program may be sequentially registered for each item.

The original signal generator 14 is a so-called crystal oscillator composed of a crystal, a resistor, a capacitor and the like, and generates an original clock signal having a constant frequency. The frequency dividing circuit 15 is formed, for example, by combining several stages of binary counters. The frequency dividing circuit 15 divides the frequency of an original clock signal input from the original signal generator 14 and uses a 1 Hz clock that can be used as a clock reference signal. A signal is generated and output to the CPU 11. The CPU 11 measures the current time based on the clock signal from the frequency dividing circuit 15 and uses it for various controls such as displaying the current time on the LCD 23 and performing on / off control of the power of the broadcast receiving apparatus 1. I have.

Next, the operation will be described. Broadcast receiver 1
Can display the time, and when the broadcast is not being received, the time is displayed on the LCD 23. That is, when the on / off key 34 of the keyboard 13 is turned off, the broadcast receiving device 1
11, the present time is measured by the clock signal input from the frequency dividing circuit 15, the display position is determined, and the text V
The current time information is output to a corresponding position in the RAM 7.
The current time information is output from the text VRAM 7 to the display controller 9 via the CG 8, and the current time is displayed at a predetermined position on the LCD 23.

When the on / off key 34 of the keyboard 13 is turned on in this state, the CPU 11 turns on the power and starts the receiving process. That is, the CPU 11
When the on / off key 34 is turned on, the power supply 1
6 is a control signal for instructing ON (for example, "H" signal)
The power supply device 16 supplies power to the tuner 3, the VIF 4, the microprocessor 5, and the error detector 6 when a control signal instructing to turn on is input. Further, the CPU 11 outputs a reset signal to the microprocessor 5 to cause the microprocessor 5 to perform an initialization process. When the initialization processing is completed, normal reception processing is performed. That is, a broadcast wave is received by the antenna 2, and the tuner 3 extracts a signal of a frequency corresponding to a predetermined channel (for example, an initially set channel) from the broadcast wave received by the antenna 2. The signal extracted by the tuner 3 is output to the VIF 4, and after performing demodulation and detection processing, the VIF 4
The video signal corresponding to the specified program is selected from the PU 11 and output to the microprocessor 5. The microprocessor 5 converts the video signal into a digital signal using an A / D converter, stores the digital signal in a buffer for each scanning line, outputs the signal to an error detector 6, and causes the error detector 6 to detect the error signal. . The error detector 6 outputs the number of detected errors to the microprocessor 5 and the CPU 11. When the number of errors is within an error recoverable range, the microprocessor 5 decodes the error with a built-in decoder and outputs it to the text VRAM 7. I do. Text VRAM
7 sequentially outputs the character code and the size to the CG 8 from the upper left to the lower right of the display screen.
The display controller 9 outputs a pattern corresponding to the data transmitted from the display controller 9 to the display controller 9, and determines the display position and the display content, and the Y-CTR 21 and the X-CT
Controls R22. Y-CTR21 and X-CTR22
Outputs a drive signal to the LCD 23 to display the content corresponding to the corresponding position on the LCD 23.

As described above, when the on / off key 34 is turned on, the broadcast receiving apparatus 1 causes the LCD 23 to display the contents of a preset channel. When the content is not
By operating the keyboard 13, the display content can be changed.

A normal operation of changing the display content is performed by operating the program key 32 or the channel key 33 of the keyboard 13. In other words, to change the program,
The program can be changed sequentially by turning on the program key 32 and operating the scroll keys 35 and 36. When changing the channel, the channel key 33 is turned on and the scroll keys 35 and 36 are operated. Can change the channel. At this time, C
The PU 11 sends the selected channel number to the tuner 3
To output the radio wave of the corresponding channel, output the program to the microprocessor 5, and make the microprocessor 5 select a video signal corresponding to the program to perform decoding and display processing. The viewer has completed the selection when the program of the desired channel is displayed.

However, when a program of a specific item is repeatedly broadcast on a plurality of channels with different programs, such as a teletext broadcast, this channel selection method uses a program until a program of a desired item is selected. Not only is there a lot of operation and it is cumbersome, but when the reception status of the selected program is poor, it is necessary to perform the same operation again and then select the channel broadcasting the same item and the program. Yes, tuning operation is troublesome.

Therefore, in the present broadcast receiving apparatus 1, when the item key 31 and the scroll keys 35 and 36 are operated to specify the target item, the channel and the program registered in the memory 12 in advance corresponding to the item are specified. Channels are tuned in the order, and when the reception condition is poor, the next channel and program are automatically tuned.

That is, as shown in FIG.
When the on / off key 34 of the keyboard 13 is turned on (step S1), the normal reception process is performed, and it is checked whether an item is selected by the item selection key 31 and the scroll keys 35 and 36 (step S2). .
When the item is not selected, the normal reception process is continued, and when the item is selected, the data of the selected program pair registered for the selected item is registered in a predetermined order, for example, the data is registered. Are read from the memory 12 in the order in which they are performed (step S4). Based on the read data of the selected program pair, the program is received (step S
5) An error is detected by the error detection 6 (step S6).

Next, the CPU 11 determines whether or not the reception state of the received program is good based on the information on the number of errors input from the error detector 6 (step S).
7). If it is determined that the reception state is not good, it is checked whether or not all the selected program pairs registered in the designated item have been received (selected) (step S8), and the selection of all the selected program pairs is performed. If not, step S
Move to 10. When all the selected program pairs in the designated item have been selected, it is checked whether or not a predetermined number of times (for example, three times) have been selected for all the selected program pairs in the item (step S9). . If the channel selection has not been performed for all the selected program pairs a predetermined number of times, the data of the selected program pair next to the designated item is read from the memory 12 (step S10), and based on the read data of the selected program pair. Then, the program is received (step S11).

When the reception of the next selected program pair starts, it is checked whether the power has been turned off (step S1).
2) When turned off, the process ends. If it is not turned off, it is checked whether or not an item selecting operation has been performed (step S13). If no item selecting operation has been performed, the process returns to step S6 to similarly detect an error in the received program.

The above processing is repeatedly executed until a program in a good reception state is received or until the channel selection processing is performed a predetermined number of times for all the selected program pairs of the designated item. If the reception state is good in step S7, the character is decoded (step S14), and the decoded character data is displayed on the LCD 23 via the text VRAM 7, the CG 8 and the display controller 9 (step S1).
5). Then, after performing reception processing of the next page (step S16), whether the power is turned off (step S12),
It is checked whether an item has been selected (step S1).
3) If the power is not turned off and no item is selected, the process returns to step S6 to detect an error of the next page. In other words, even if the receiving condition is once judged good and the automatic tuning operation is interrupted, the receiving condition is always checked, and if the receiving condition deteriorates during the reception, the automatic tuning operation is restarted. can do.

If, during the automatic channel selection, the channel selection is performed a predetermined number of times for all the channel selection programs of the specified item in step S9, there is no program with a good reception condition in the specified item. Error message to the LCD
23 (step S17), and after a lapse of a predetermined time, the power is turned off to end the processing (step S1).
8). The message may be, for example, "The program corresponding to the specified item cannot be selected due to poor reception."
And so on. In this case, without turning off the power immediately,
A message prompting the user to specify another item may be displayed, and the power may be turned off if no other item is specified after a predetermined time has elapsed.

As described above, if a channel selection program pair is registered in advance for each item, the viewer simply designates an item to be viewed, and among the programs registered corresponding to the item, a program having a good reception condition is selected. Can be automatically selected. Therefore, it is possible to quickly and easily select a program of an item to be viewed without repeatedly performing a troublesome tuning operation. As a result, the operability and convenience in selecting a channel can be improved without providing many preset keys in the broadcast receiving apparatus 1, and necessary information can be quickly obtained. Portability and usability can be improved.

[0031]

According to the present invention, when the same content is broadcast on a plurality of channels for each item such as teletext, simply specify the item and instruct the start of channel selection. The registered program pair can be selected, and when the reception condition of the selected program pair is poor and cannot be received normally, the channel selection of the selected program pair is automatically performed in a predetermined order. Without having to perform a troublesome tuning operation.
You can easily tune. As a result, the operability and convenience in selecting a broadcast receiving device can be improved, and necessary information can be quickly obtained, thereby improving the portability and usability of the broadcast receiving device. it can.

[Brief description of the drawings]

FIG. 1 is a block diagram of a broadcast receiving apparatus according to the present invention.

FIG. 2 is an exemplary front view of a keyboard of the broadcast receiving device of FIG. 1;

FIG. 3 is a view showing a storage state of a selected program pair in a memory 12 of FIG. 1;

FIG. 4 is a flowchart showing an automatic tuning process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Broadcast receiving apparatus 2 Antenna 3 Tuner 5 Microprocessor 6 Error detector 10 Display part 11 CPU 12 Memory 13 Keyboard 14 Original signal generator 15 Divider circuit 16 Power supply device

Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04N 5/44-5/46 H04N 7/025-7/088 H04B 1/06 H04B 1/16

Claims (1)

(57) [Claims] 1. A plurality of channels broadcast the same type of program content, receiving means capable of receiving each of these broadcast radio waves, and a broadcast signal tuned to a predetermined radio wave from the broadcast radio wave received by said receiving means. Channel selecting means for extracting the broadcast signal; receiving state detecting means for detecting a receiving state of the broadcast signal selected by the channel selecting means; and output means capable of outputting broadcast contents corresponding to the broadcast signal selected by the channel selecting means. An external operation means for storing a plurality of sets of reception channels and broadcast programs as a selected program pair for each item defining a type of a program in the storage means; Of the selected program pair,
Selection means for selecting a channel and a program, respectively, and the selection means selects an item of a selected program pair and a reception channel.
When selecting files and programs, multiple items stored in advance
Eyes, receiving channels, and programs
Are scroll display means capable of scrolling display in reverse order, channel selection instruction means for starting channel selection of a selected program pair stored in the storage means by specifying an item, and the item is specified by the channel selection instruction means. When it is instructed to start the channel selection of the channel selection program pair corresponding to this item, if it is determined that the reception status of the channel selection program is worse than the detection result of the reception state detection means, Is selected by the tuning means, and a selected program pair having a good reception state is selected as a selected program from the detection result of the reception state detection means. A broadcast receiving apparatus comprising: a tuning control unit.