JPH0897736A - Broadcast receiver - Google Patents

Abstract

PURPOSE: To surely record a desired program by correcting automatically even when a broadcast time is revised after a recording time of the broadcast program is set at a receiver side. CONSTITUTION: A tuner 3 extracts a signal of a frequency corresponding to a prescribed channel from a broadcast radio wave received by an antenna 2, a VIF 4 is used to apply demodulation detection processing, a video signal coding to a program designated by a CPU 11 is selected and outputted to a microprocessor 5. When program time revision information, is FM-multiplexed on the received video signal, the VIF 4 separates the video signal and the multiplexed information into the video signal and program time revision information, an A/D converter of the microprocessor 5 converts the signal into a digital signal, the program recording set by the memory 12 is revised based on the program time revision information, the program recording time set to a memory 12 is revised by the program time revision information and a program recording section 17 records a program based on the program recording time after the revision.

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 for receiving a program broadcast transmitted from a broadcasting station and recording it.

[0002]

2. Description of the Related Art A conventional broadcast receiving apparatus receives a broadcast radio wave transmitted from a broadcasting station and outputs a program in real time from a display or a speaker, but it is absent at the broadcast time of a desired program. Although it was repeatedly broadcast, there was a problem that you could not watch the desired program when you wanted to watch (or want to listen to). Therefore, in recent broadcast receiving devices, the received broadcast program data is recorded in a recording medium such as a magnetic disk or a magnetic tape, and desired program data is recorded from the recording medium when desired (when desired). It has a program recording function that can be read.

In addition to the usual radio receivers and television receivers, the above-mentioned broadcast receiving apparatus is, for example, a receiver dedicated to teletext, or an ordinary television receiver that also serves as a telecast receiver. and so on. In particular, this teletext receiver receives repeated transmission of radio waves of teletext programs of a specific type from a broadcasting station, and cyclically transmits programs of multiple types of content as radio waves of teletext. Is being received.

[0004]

However, in such a conventional broadcast receiving apparatus, the program recording function is used to set the program recording start time and end time in advance in accordance with the broadcast time of the desired program. When set, recording and recording of a program automatically started at the arrival of the set recording start time, and recording of the program ended when the set recording end time came.

Therefore, the recording start time and the end time of the program are fixed once set, and when the special program is inserted or the broadcast time of the previous program is extended, the recording time is deviated. There was a problem that the desired program could not be recorded.

Further, conventionally, in order to change the recording start time and the end time of a program, the recording time previously set by the user on the broadcast receiver side is temporarily canceled and the recording time is changed if a new time is set. Is possible. However, if there is no user at the time of changing the broadcast time, the extension time of the program is unknown, or a special program is suddenly inserted, it is virtually impossible to change the set time, and the desired program cannot be changed. Cannot be recorded.

Therefore, the present invention has been made in view of the above-mentioned problems, and after the recording time for automatically recording a broadcast program is set in advance, even if the broadcast time is changed, the set recording time is changed. It is an object of the present invention to provide a broadcast receiving device capable of surely recording a desired program by automatically correcting to a correct recording time.

[0008]

According to a first aspect of the present invention, there is provided a broadcast receiving apparatus having a program recording means for presetting a recording time of a broadcast program and automatically recording the program. A receiving means for receiving a broadcast wave including the program time change information transmitted from the broadcasting station, and a program time change information extracting means for separating the received program time change information from the broadcast wave and extracting the received program time change information. Recording set time changing means for changing the recording set time of the program recording means on the basis of the extracted program time changing information, and is preset when receiving the program time changing information transmitted from the broadcasting station. The above object is achieved by changing the program recording time and recording the program at the changed recording time.

Further, in the broadcast receiving apparatus according to claim 1, for example, as described in claim 2, the receiving means is:
The broadcast time transmitted from the teletext broadcasting station is received, the program time change information extracting means extracts the program time change information of the teletext, and the recording set time changing means extracts the extracted program time change information. The recording set time may be changed based on the above.

Further, the broadcast receiving apparatus according to claim 1,
For example, as described in claim 3, the radio wave transmitted from the broadcasting station is an FM broadcast radio wave, and the program time change information transmitted by being multiplexed with the FM broadcast radio wave is received. Good.

Further, the broadcast receiving apparatus of the present invention is defined in claim 4.
A broadcast receiving device having a program recording means for presetting a recording time of a broadcast program and automatically recording the broadcast program, the broadcast radio wave transmitted from a broadcasting station, and the transmission multiplexed with the radio wave. Receiving means for receiving the program time change information, the program time change information extracting means for separating the received program time change information from the broadcast wave and extracting the received program time change information, and based on the extracted program time change information Recording setting time changing means for changing the recording setting time of the program recording means, and program recording set in advance when program time change information transmitted from a broadcasting station by being multiplexed and transmitted is received. The above object is achieved by changing the time and recording the program at the changed recording time.

Further, in a broadcast receiving apparatus according to claim 4, for example, as described in claim 5, the receiving means is
The broadcast time transmitted from the teletext broadcasting station is received, the program time change information extracting means extracts the program time change information of the teletext, and the recording set time changing means extracts the extracted program time change information. The recording set time may be changed based on the above.

Further, the broadcast receiving apparatus according to claim 4 is
For example, as described in claim 6, the radio wave transmitted from the broadcasting station is an FM broadcast radio wave, and the program time change information transmitted by being multiplexed with the FM broadcast radio wave is received. Good.

[0014]

In the broadcast receiving apparatus according to claim 1, the receiving means receives the broadcast radio wave and the program time change information transmitted from the broadcasting station, and the program time change information extracting means extracts the program time from the received broadcast radio wave. Separate and extract change information,
Based on the program time change information, the recording set time changing means changes the recording set time set in the program recording means.

Therefore, even if the special program is inserted or the broadcast time of the previous program is extended, when the program time change information transmitted from the broadcasting station is received, the program recording preset in the receiver side is recorded. Since the time is automatically changed and the program is recorded at the recording time after the change, the desired program can be surely recorded.

In the broadcast receiving apparatus according to the second aspect, the receiving means receives the broadcast radio wave transmitted from the teletext broadcasting station, the program time change information extracting means extracts the program time change information of the teletext, and the extraction is performed. The recording setting time of the teletext is changed by the recording setting time changing means based on the recorded program time change information.

Therefore, when the desired teletext program is selectively recorded, the program time is changed from the broadcasting station side even if the broadcast time is changed after setting the recording time according to the text broadcast program time. The receiver can automatically change the recording time and can reliably record the desired teletext program by simply multiplexing the information with the broadcast wave and transmitting the information.

In the broadcast receiving apparatus according to the third aspect, the radio wave transmitted from the broadcasting station is an FM broadcast radio wave,
The program time change information is transmitted by being multiplexed with the broadcast radio wave and is received. Therefore, it can be used as an automatic program recording device on the receiver side of FM radio broadcasting, text broadcasting, or television broadcasting.

It is to be noted that claims 4 to 6 claim that the program time change information is received as a multiplexed signal.

[0020]

EXAMPLES The present invention will be specifically described below based on examples. 1 to 4 are diagrams showing an embodiment of a broadcast receiving apparatus according to the present invention, which is applied to a teletext receiving apparatus. FIG. 1 is a block diagram of a broadcast receiving apparatus 1 of this embodiment. The broadcast receiving apparatus 1 includes an antenna 2, a tuner 3, a VIF 4, a microprocessor 5, an error detector 6, a text VRAM 7, and a CG (character generator) 8. , Display controller 9, display unit 10, CPU 1
1, memory 12, keyboard 13, original signal generator 14,
A frequency divider circuit 15, a power supply device 16, a program recording section 17, etc. are provided. The broadcast receiving device 1 is capable of receiving a character broadcast or a broadcast in which a program of a specific item is repeatedly performed.

The broadcast receiving apparatus 1 receives broadcast radio waves by its antenna (reception means) 2, and the broadcast radio waves received by the antenna 2 are sent to the tuner 3. The tuner 3 is a so-called electronic tuner composed of a coil, a capacitor, a resistor, etc., and operates under the control of the CPU 11. The tuner 3 tunes to a radio wave of a frequency designated by the CPU 11, extracts a signal of that frequency, and outputs it to the VIF 4.

The VIF 4 is composed of a demodulation circuit, a detection circuit, etc., demodulates and detects a signal input from the tuner 3, and extracts a video signal portion from the signal. Further, in this embodiment, the program time change information is sent by being multiplexed with the broadcast wave from the broadcast station. This program time change information is information for changing the program recording time set on the receiver side when the program broadcast time to be broadcast at the broadcasting station is changed. Specifically, the program time change data is FM-modulated by using the data subcarrier multiplexed above the outside of the video band of the FM broadcast radio wave to obtain a broadcast wave signal. Then, the VIF 4 of the broadcast receiver 1 that receives this broadcast wave demodulates the received broadcast wave signal by FM, and separates the FM-multiplexed video signal and the multiplexed data including the program time change information.

The microprocessor 5 includes an A / D converter,
The microprocessor 5 includes a buffer, a decoder, and the like, and the analog video signal and the multiplexed data input from the VIF 4 are converted into digital signals by the A / D converter and stored in the buffer. Further, the microprocessor 5 decodes the input signal by the decoder and converts it into character data of teletext and program time change information of multiplexed data.

The digital signals stored in the buffer of the microprocessor 5 are sequentially taken out and output to the error detector 6, which detects the number of errors in the error signal and outputs the detected error number to the microprocessor. Output to the processor 5 and the CPU 11. Text VRAM7 is CP
Under the control of U11, the character position, size and character code on the display screen are stored.

A CG (character generator) 8 stores a display dot pattern corresponding to a size and a code. When the size and the code are input from the text VRAM 7, the display dot pattern is output to the display controller 9. .

The display controller 9 is composed of an input sequence counter and a display position control circuit, and displays a position signal and a display signal so that the dot pattern sequence input from the CG 8 is sequentially displayed from the upper left to the lower right of the display screen. Occurrence and display 1
Output to 0.

The display unit 10 includes a Y-CTR 21 and an X-CT.
R22 and LCD (liquid crystal display) 23
The CD 23 is driven by the drive signal from the Y-CTR 21 and the X-CTR 22. Y-CTR21 and X-C
The TR 22 LCDs a drive signal for controlling specified ON / OFF for each coordinate of the LCD 23 based on the position signal and the display signal input from the display controller 9.
To 23. The LCD 23 has display pixels arranged in a dot matrix, and has Y-CTR 21 and X-.
It is turned on (for example, black display) or turned off (transparent display) by a drive signal from the CTR 22.

The CPU 11 is a microprocessor, RO
The ROM is composed of M, RAM, and the like, and in the ROM, a program as the broadcast receiving device 1, a later-described program for determining whether it is during broadcast time, a program for notifying outside broadcast time, and the like are stored and selectable. The channel number and the frequency corresponding to the channel number are stored. The RAM is used as a work memory, and the microprocessor follows a program in the ROM to
The respective units of the broadcast receiving apparatus 1 are controlled to function as the broadcast receiving apparatus 1. The CPU 11 controls the tuner 3 and the microprocessor 5 in accordance with the program selected by the keyboard 13 to select the selected program, and, as described later, uses the keyboard 13 to match the recorded program. Program selection and recording time are set, and memory 12
The program recording information set in is stored. And CPU1
1 retrieves the program recording information stored in the memory 12 and starts the program recording operation when the program recording time of the selected channel is reached, and stops the program recording operation when the program recording time ends. Further, when the CPU 11 receives the program time change information from the broadcasting station side as described later,
The program recording time set in the memory 12 is rewritten.

As shown in FIG. 2, the keyboard 13 includes an item selection key 31, a program selection key 32, a channel selection key 33, a power on / off key (ON / OFF) 34,
It is provided with a feed scroll key 35, a return scroll key 36, a start time designation key 37, an end time designation key 38, a registration key 39 and the like, and performs various operations of the broadcast receiving apparatus 1. The item key 31 can be used to select the item of the program to be selected in advance (for example, the item indicating the type of program such as weather, traffic information, stock price information, news, and cooking), and the channel key 33 can be used to select the channel of the broadcasting station. can do. Further, the program of each channel can be selected by the program selection key 32, and the power of the broadcast receiving apparatus 1 can be turned on / off by the on / off key 34. The scroll keys 35 and 36 are the ROM of the CPU 11 when the respective item keys 31 are pressed.
A plurality of items stored in advance in the memory 12 or a plurality of items registered in the memory 12 described later can be scrolled in the forward order or the reverse order. When the program key 32 is pressed, You can scroll. Further, when the channel key 33 is turned on, the channels that can be selected can be selected by the scroll keys 35 and 36.

The recording start time designation key 37, the recording end time designation key 38, and the registration key 39 are keys used when registering program recording information for recording a predetermined program in the memory 12. That is, the recording start time designation key 37
Is set to a mode for designating the broadcast start time of the program selected by the channel selection key 33 or the program selection key 32, and the end time designation key 38 is a mode for designating the broadcast end time of the selected program. Set to. Then, the registration key 39 is used to instruct the memory 12 to register the broadcast start time and broadcast end time set in each mode.

The memory 12 is composed of a RAM or the like and stores program recording information. That is, as shown in FIG. 3, the memory 12 is divided into storage areas according to items according to program contents, and a channel number and a program are associated with each other in the storage area for each item. It is stored as a program pair. In each selected program pair, the start time and end time of the program are stored as the program recording information for each program, and a plurality of selected program pairs can be registered for each item. The items, channels, and programs can be registered in the memory 12 by operating the keyboard 13.

That is, as shown in FIG. 2, the item key 3
When 1 is input, only one item is read from the ROM and displayed on the LCD 23. 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 item is selected. When the item is selected, the CPU 11 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 process for the items to be registered. When registering a channel and a program corresponding to each item, similarly, the channel key 33 or the program key 32 is turned on, and the desired channel number or program is displayed on the LCD 23 with the scroll keys 35 and 36. When the corresponding channel number or program is displayed, the channel number or program is selected. By selecting an item for the selected channel number or program, a set of the selected channel number and program is stored in the memory 12 as a selected program pair in association with the item. For the selected program pair thus selected, the broadcast start time and broadcast end time of that program are then registered. That is, when the start time designation mode is set by the start time designation key 37 and the start time is input, the registration key 39 is input and stored in the memory 12. Also,
When the end time designating mode is set by the end time designating key 38 and the end time is entered, the registration key 39 is turned on and stored in the memory 12. Needless to say, the registration of the channel number, the program, and the start time and the end time are not limited to the above method.

The program recording information registered in the memory 12 is registered by the listener as described above, but in the present embodiment, the broadcasting station side inserts a special program temporarily or extends the broadcasting time. Then, the program time change information is FM-multiplexed and transmitted on the character broadcast radio wave, and when this is received by the broadcast receiving device side, the program recording information registered in the memory 12 is rewritten. Specifically, when the program time change information sent from the broadcasting station is the same program as the program recording information registered in the memory 12, it is judged that the broadcast time has been changed, and the program recording information already registered. The recording start / end time of the program is changed based on the received program time change information. The original signal generator 14 is a so-called crystal oscillator composed of a crystal, a resistor, a capacitor, etc., and generates an original clock signal of a constant frequency.

The frequency dividing circuit 15 is formed by combining several stages of binary counters, for example, and can divide the original clock signal input from the original signal generator 14 to use it as a reference signal for a timepiece. A 1 Hz clock signal is generated and output to the CPU 11. CPU11
Measures the current time by the clock signal from the frequency dividing circuit 15 and displays the current time on the LCD 23,
It is used for various controls such as on / off control of the power supply of the broadcast receiving apparatus 1.

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

The program recording section 17 records the program data of the teletext program transmitted from the broadcasting station, and C based on the program recording information set and registered in the memory 12.
The PU 11 gives an instruction to start / end the recording operation and selectively records only desired program data. Here, the user on the receiving side sets the program recording information in advance as described above. However, if there is a change in the broadcast time of the set program, the memory 12 is updated by the program time change information sent from the broadcast station. The recording setting time is changed, and the program recording process is performed based on the changed recording setting time.
Therefore, the user on the receiving side only needs to set the recording time of the desired program once, and even if the broadcast time is changed after the setting, it automatically responds to this and ensures the desired program. Can be recorded.

Next, the operation will be described. First, when the on / off key 34 of the keyboard 13 is turned on, the CPU 1
1 outputs a control signal (for example, an “H” signal) for instructing the power supply device 16 to turn on, and the power supply device 16 receives the control signal for instructing to turn on the tuner 3 and the VIF.
4. Power is supplied to the microprocessor 5 and the error detector 6. Further, the CPU 11 is the microprocessor 5
A reset signal is output to the microprocessor 5 to cause the microprocessor 5 to perform initialization processing. When the initialization process is completed, the tuner 3 extracts a signal of a frequency corresponding to a predetermined channel from the broadcast radio wave received by the antenna 2, demodulates and detects the signal with the VIF 4, and then the CPU 1
The video signal corresponding to the program designated from 1 is selected and output to the microprocessor 5. At this time, when the program time change information is FM-multiplexed in the received video signal, the video signal and the program time change information are separated by the VIF 4 and then digitally converted by the A / D converter of the microprocessor 5. .

The video signal is stored in the buffer for each scanning line and is output to the error detector 6 so that the error detector 6 can detect the error signal. Error detector 6
Indicates the number of detected errors by the microprocessor 5 and the CP.
When the number of errors is within the error recoverable range, the microprocessor 5 decodes it with a built-in decoder and outputs it to the text VRAM 7. The text VRAM 7 sequentially outputs the character code and size to the CG 8 from the upper left to the lower right of the display screen, and the CG 8 outputs the pattern corresponding to the data sent from the text VRAM 7 to the display controller 9 and the display controller. 9 determines the display position and display content, and Y-CTR2
1 and X-CTR22. The Y-CTR 21 and the X-CTR 22 output a drive signal to the LCD 23,
The content corresponding to the corresponding position on the LCD 23 is displayed.

Further, the program time change information FM-multiplexed with the video signal is demodulated by the VIF 4 and separated, and is digitally converted by the A / D converter of the microprocessor 5 shown in FIG. This data is used to change the program recording time preset in the memory 12, and is composed of a program code, a recording start time, a recording end time, and a flag for urging the recording time to be changed.

FIG. 4 is a flow chart for explaining the program time changing process in the broadcast receiving apparatus of this embodiment. As shown in FIG. 4, when the program time change information is FM-multiplexed in the received video signal, the CPU 11 determines whether or not the program time change information has a flag urging the change of the recording time (step S1). If there is no flag, the processing from step S3 onward is performed without changing the recording time. If there is a flag, the reserved time of the recording set time of the same program preset in the memory 12 is rewritten and changed (step S2).

Next, the CPU 11 executes step S2 in FIG.
The arrival of the program recording start time of the memory 12 changed in step S3 is monitored (step S3), and when the program recording start time arrives, the program recording unit 17 is instructed to perform the program recording processing and the program data is recorded (step S4). Further, the CPU 11 monitors the arrival of the program recording end time in parallel with the program data recording processing (step S5), and when the program recording end time set in the memory 12 arrives, the program recording unit 17 performs the recording processing. finish.

As described above, the program recording time preset in the memory 12 on the broadcast receiver side is set to the recording setting time and the actual program broadcasting time when a special program is inserted or the previous program broadcasting time is extended. Since it is out of sync, it will not be possible to reliably record the desired program. However, in the broadcast receiving apparatus of the above-described embodiment, the broadcast station side FM-multiplexes the text broadcast radio waves to transmit the program time change information, which is received to change the program recording set time. Even if the broadcast time is changed, the desired program can be surely recorded.

In the above embodiment, a case has been described in which a character broadcasting radio wave is transmitted from a broadcasting station, and the program time change information of the character broadcasting program is FM-multiplexed and transmitted to this radio wave.
The present invention is not limited to text broadcasting, but can also be applied to ordinary radio broadcasting or television broadcasting.

Further, in the above embodiment, the program time change information is transmitted as the control information which is multiplexed with the main broadcast radio wave and transmitted. However, the control information other than this is, for example, only a fixed time during which a commercial (CM) is flown. If you send the recording stop information etc. to stop the recording automatically,
Commercials can be cut only for recorded program data. Of course, in the present invention, the control information multiplexed and transmitted with the main broadcast radio wave is not limited to the above example, various control information is multiplexed with the main broadcast radio wave and transmitted, and the receiver side is controlled based on this. You may do it.

[0045]

According to the broadcast receiving apparatus of the first and the fourth aspects, the receiving means receives the broadcast radio wave including the program time change information transmitted from the broadcasting station, and the received broadcast radio wave. From the program time change information extracting means, the program time change information is extracted, and the recording set time set in the program recording means is changed by the recording set time changing means based on the program time change information. Even if the broadcast time is changed, the desired program can be surely recorded.

According to the broadcast receiving device described in claims 2 and 5, since this is applied as a teletext receiving device, when only the desired teletext program is selectively recorded, Even if the broadcast time is changed, recording mistakes are eliminated, and the desired teletext program can be reliably recorded.

According to the broadcast receivers of claims 3 and 6, the radio wave transmitted from the broadcasting station is an FM broadcast radio wave, and the FM broadcast radio wave is multiplexed to control program time change information and the like. Since the information is transmitted, it becomes possible to reliably transmit the control information having a large amount of information, and it can be used as an automatic program recording device on the receiver side of FM radio broadcasting or television broadcasting.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a broadcast receiving apparatus according to an embodiment.

FIG. 2 is a front view of a keyboard of the broadcast receiving apparatus of FIG.

FIG. 3 is a diagram showing a storage state of broadcast time information in the memory of FIG.

FIG. 4 is a flowchart showing a program recording time changing process and a program recording process preset in the memory of FIG.

[Explanation of symbols]

 1 Broadcasting Receiver 2 Antenna 3 Tuner 4 VIF 5 Microprocessor 6 Error Detector 7 Text VRAM 8 CG (Character Generator) 9 Display Controller 10 Display 11 CPU 12 Memory 13 Keyboard 14 Original Signal Generator 15 Frequency Divider 16 Power Supply 17 Program Recording Department

Claims (6)

[Claims] 1. A broadcast receiving apparatus comprising a program recording means for presetting a recording time of a broadcast program and automatically recording the broadcast program, and receiving the broadcast radio wave including program time change information transmitted from a broadcast station. Means, program time change information extraction means for separating and extracting the received program time change information from broadcast waves, and changing the recording set time of the program recording means based on the extracted program time change information The recording set time changing means is provided, and when the program time change information transmitted from the broadcasting station is received, the preset program recording time is changed to record the program at the changed recording time. Broadcast receiver. 2. The receiving means receives broadcast radio waves transmitted from a teletext broadcasting station, and the program time change information extracting means extracts program time change information of the text broadcast to change the recording set time. The broadcast receiving apparatus according to claim 1, wherein the means changes the recording set time based on the extracted program time change information. 3. The radio wave transmitted from the broadcast station is an FM broadcast radio wave, and the program time change information transmitted by being multiplexed with the FM broadcast radio wave is received. The broadcast receiving device according to Item 2. 4. A broadcast receiving device provided with a program recording means for presetting a recording time of a broadcast program and performing automatic recording, the broadcast radio wave transmitted from a broadcast station, and the radio wave transmitted in a multiplexed manner. Receiving means for receiving the program time change information, program time change information extracting means for separating the received program time change information from broadcast radio waves, and the program based on the extracted program time change information A recording setting time changing means for changing the recording setting time of the recording means is provided, and the preset program recording time is set when the program time change information transmitted from the broadcasting station by being multiplexed and transmitted is received. A broadcast receiving device characterized by changing and recording a program at a recording time after the change. 5. The receiving means receives a broadcast radio wave transmitted from a teletext broadcasting station, and the program time change information extracting means extracts program time change information of the text broadcast to change the recording set time. 5. The broadcast receiving apparatus according to claim 4, wherein the means changes the recording set time based on the extracted program time change information. 6. The radio wave transmitted from the broadcast station is an FM broadcast radio wave, and the program time change information transmitted by being multiplexed with the FM broadcast radio wave is received. Item 5. The broadcast receiving device according to Item 5.