JP2006332855A - Television broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a television broadcast receiver for efficiently storing data of all bands of television broadcast waves without the need for provision of tuners corresponding to each channel of the television broadcast waves. <P>SOLUTION: The television broadcast receiver includes: an A/D converter section 21 for converting an analog broadcast wave signal of a television broadcast wave into digital data; a memory section 22 for storing the converted digital data; an EPG data file 63A for storing EPG data; an erasure program 63C that allows a CPU 61 to reference the EPG data stored in the EPG data file 63A, extract a program broadcast in the oldest past among programs during broadcasting and to erase the digital data in the past older than a time when the program is started; a D/A converter section 24 that converts the digital data stored in the memory section 22 into analog data to reproduce the broadcast wave signal; and an up-converter 25 for generating an IF signal of a channel desired by a user from the broadcast signal. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a television broadcast receiving apparatus.

  Conventionally, a television broadcast receiver uses a tuner to select a television broadcast wave of a predetermined channel from television broadcast waves, convert it to an IF signal, and display data obtained by performing demodulation processing on the IF signal. The data is output to a device or an audio output device, or stored in a storage device.

  Further, not only video data and audio data but also program schedule data called EPG (Electronic Program Guide) are transmitted simultaneously as television broadcast waves. Then, using the EPG data, an index table of the program stored in the storage device is created, the index table is displayed on the display device, and the user can easily select a desired program from the programs stored in the storage device. There is also known a digital television broadcast receiver that can select and reproduce a program (for example, Patent Document 1).

In addition, a digital television broadcast receiver and a home server are integrated, and the user connects to the home server using a mobile phone or the like, so that the user can check a program that is currently being broadcast from outside, Also known is a system that can instruct recording of the program (for example, Patent Document 2).
Then, as in the digital television broadcast receiving apparatus described in Patent Document 1, the digital television broadcast receiving apparatus normally selects a television broadcast wave of a predetermined channel from the television broadcast waves by a tuner. Data converted into an IF signal and subjected to demodulation processing and the like are sequentially stored in a storage device so that even a past program can be viewed. However, for example, in the case of digital television broadcast waves, about 50 channels of television broadcast waves are included. Therefore, in order to store data of the entire band of television broadcast waves in the storage device, a tuner for 50 channels is required. Is required.
JP 2004-328244 A JP 2002-185906 A

  However, if a tuner is provided for each channel, the cost increases, and the television broadcast receiving apparatus becomes very expensive. Therefore, if the data of the entire band of the television broadcast wave is frequency-converted, sampled, converted into digital data, and stored in the storage device, it is not necessary to provide a tuner for each channel. Become. However, if the data of the entire band of the television broadcast wave is stored in the storage device, the amount of data to be stored becomes enormous, which is not realistic.

  An object of the present invention is to provide a television broadcast receiving apparatus that efficiently stores data of the entire band of a television broadcast wave without providing a tuner corresponding to each channel of the television broadcast wave. .

The invention according to claim 1 is an A / D conversion means for analog-digital conversion of a broadcast wave signal of a television broadcast wave or a broadcast wave signal subjected to frequency conversion;
A memory unit for storing digital data converted by the A / D conversion unit;
Storage means for storing EPG data included in the television broadcast wave;
By referring to the EPG data stored in the storage means, a program that has been broadcast from the past is extracted from among the programs that are being broadcast, and digital data that is past from the time when the program was started is stored in the memory unit. Control means for erasing from,
D / A conversion means for digital-analog conversion of digital data stored in the memory unit;
A signal generation means for generating an IF or RF signal of a channel desired by the user from the broadcast wave signal digital-analog converted by the D / A conversion means,
The A / D conversion means performs sampling at a frequency that is at least twice the maximum frequency of the broadcast wave signal or the frequency-converted broadcast wave signal.

The invention according to claim 2 is an A / D conversion means for analog-to-digital conversion of a broadcast wave signal of a television broadcast wave or a frequency-converted broadcast wave signal;
A memory unit for storing digital data converted by the A / D conversion unit;
Storage means for storing EPG data included in the television broadcast wave;
By referring to the EPG data stored in the storage means, a program that has been broadcast from the past is extracted from among the programs that are being broadcast, and digital data that is past from the time when the program was started is stored in the memory unit. Control means for erasing from,
It is characterized by having.

  According to a third aspect of the present invention, in the television broadcast receiving apparatus according to the second aspect, the A / D conversion means has a frequency that is at least twice the maximum frequency of the broadcast wave signal or the frequency-converted broadcast wave signal. It is characterized by sampling in

According to a fourth aspect of the present invention, in the television broadcast receiving apparatus according to the second or third aspect, a D / A conversion means for digital-analog conversion of digital data stored in the memory unit;
A signal generation means for generating an IF or RF signal of a channel desired by the user from the broadcast wave signal digital-analog converted by the D / A conversion means;
It is characterized by having.

  According to the first aspect of the present invention, the broadcast wave signal of the television broadcast wave or the frequency-converted broadcast wave signal is analog-to-digital converted by the A / D conversion means, and the A / D conversion means converts the signal into the memory unit. Since the converted digital data is stored, the data of the entire band of the television broadcast wave is converted into an IF signal by the tuner and is converted into an analog digital signal and stored in the memory unit without being demodulated. Thus, the data of the entire band of the television broadcast wave can be stored in the memory unit without providing a tuner for each channel.

  The storage means stores the EPG data included in the television broadcast wave, and the control means refers to the EPG data stored in the storage means and broadcasts from the past among the programs being broadcast. Since the program is extracted and digital data past the time when the program is started is erased from the memory unit, the data of the program being broadcast is reliably stored in the memory unit, and the data of the finished program is sequentially By erasing from the memory unit, it is possible to efficiently store data of the entire band of the television broadcast wave.

  Further, since the A / D conversion means performs sampling at a frequency that is at least twice the maximum frequency of the broadcast wave signal or the frequency-converted broadcast wave signal, it is possible to prevent deterioration when the broadcast wave signal is reproduced.

In addition, the digital data stored in the memory unit is converted from digital to analog by the D / A conversion means to reproduce the broadcast wave signal, and the broadcast is generated by the signal generation means and converted from digital to analog by the D / A conversion means. Since the IF or RF signal of the channel desired by the user is generated from the wave signal, the broadcast wave signal is reproduced from the digital data stored in the memory unit to generate the IF or RF signal of the channel desired by the user. be able to.

  According to the second aspect of the present invention, the broadcast wave signal of the television broadcast wave or the frequency-converted broadcast wave signal is analog-to-digital converted by the A / D conversion means, and the A / D conversion means converts the signal into the memory unit. Since the converted digital data is stored, the data of the entire band of the television broadcast wave is converted into an IF signal by the tuner and is converted into an analog digital signal and stored in the memory unit without being demodulated. Thus, the data of the entire band of the television broadcast wave can be stored in the memory unit without providing a tuner for each channel.

  The storage means stores the EPG data included in the television broadcast wave, and the control means refers to the EPG data stored in the storage means and broadcasts from the past among the programs being broadcast. Since the program is extracted and digital data past the time when the program is started is erased from the memory unit, the data of the program being broadcast is reliably stored in the memory unit, and the data of the finished program is sequentially By erasing from the memory unit, it is possible to efficiently store data of the entire band of the television broadcast wave.

  According to the invention described in claim 3, the same effect as that of the invention described in claim 2 can be obtained, and in particular, the A / D conversion means is a broadcast wave signal or a frequency-converted broadcast wave. Since sampling is performed at a frequency that is twice or more the maximum frequency of the signal, it is possible to prevent deterioration when a broadcast wave signal is reproduced.

  According to the invention described in claim 4, the same effect as that of the invention described in claim 2 or 3 can be obtained, in particular, digital data stored in the memory unit by the D / A conversion means. Is converted from digital to analog and a broadcast wave signal is reproduced. The signal generation means generates an IF or RF signal of the channel desired by the user from the broadcast wave signal reproduced by digital / analog conversion by the D / A conversion means. Therefore, it is possible to reproduce the broadcast wave signal from the digital data stored in the memory unit and generate the IF or RF signal of the channel desired by the user.

Hereinafter, the best mode for carrying out a television broadcast receiver according to the present invention will be described in detail with reference to the drawings.
(First embodiment)
First, the configuration of the television broadcast receiving apparatus 100 according to the first embodiment of the present invention will be described. As shown in FIG. 1, the television broadcast receiver 100 according to the first embodiment of the present invention includes an antenna 1, a broadcast wave storage unit 2, a tuner 3, a signal selector 4, a reproduction unit 5, a main control unit 6, and An input unit 7 is provided.

  The television broadcast receiver 100 is connected to the display device 200 and the audio output device 300.

  The antenna 1 is a parabolic antenna, a UHF antenna or the like, receives a television broadcast wave, and outputs a broadcast wave signal of the television broadcast wave to the broadcast wave storage unit 2 or the tuner 3. In the case of receiving a television broadcast wave via a CATV line, a connection cable (not shown) or the like may be provided instead of the antenna 1.

  In the present invention, the broadcast wave signal means a television broadcast wave RF signal or a down-converted signal obtained by frequency-converting the RF signal.

  The broadcast wave storage unit 2 includes a down converter 20, an A / D conversion unit 21, a memory unit 22, a control unit 23, a D / A conversion unit 24, an up converter 25, and the like, and is controlled by the main control unit 6. In accordance with the signal, digital data generated by performing digital-analog conversion processing or the like on the television broadcast wave received by the antenna 1 is stored in the memory unit 22, and the user desires from the digital data stored in the memory unit 22 Generate an IF signal for the channel.

The down converter 20 includes a frequency converter, an LPF (Low Pass Filter), and the like, and frequency-converts the entire band of an RF (Radio Frequency) signal input from the antenna 1 to generate a down-converted signal. More specifically, a signal obtained by down-converting the frequency of the RF signal is generated by mixing the local oscillation frequency so that the lower frequency limit of the entire band of the RF signal input from the antenna 1 is around 0 Hz. A down-converted signal is generated by removing an extra signal by the LPF.

  The A / D conversion unit 21 samples the entire band of the down-converted signal input from the down converter 20, performs analog-digital conversion, generates digital data, and outputs the digital data to the memory unit 22. Thereby, the A / D converter 21 functions as an A / D converter. Here, the sampling in the A / D converter 21 is performed by sampling at a frequency that is at least twice the maximum frequency of the down-converted signal in consideration of the Nyquist frequency in order to prevent deterioration when the down-converted signal is reproduced. Is desirable.

  The memory unit 22 is configured by, for example, an HDD device and sequentially stores digital data input from the A / D conversion unit 21. More specifically, the digital data input from the A / D converter 21 and time information such as the time when the television broadcast wave of the digital data is received are stored. The time information is the time when the television broadcast wave of the digital data is received every predetermined unit time (for example, several tens of units, etc.), and may be added as header information to the digital data. It may be added as a table. Here, the time information may be, for example, time data based on a signal output from a clock circuit (not shown) provided in the broadcast wave storage unit 2, or the time information is included in the television broadcast wave. In such a case, the time information may be used.

  Further, when the digital data stored in the memory unit 22 is reproduced, the digital data is output to the D / A conversion unit 24.

  Further, digital data stored in the memory unit 22 is automatically erased when a CPU 61 described later executes an erase program 63C.

  In accordance with a control signal from the main control unit 6, the control unit 23 adds time information such as the time when the television broadcast wave of the digital data is received to the digital data input from the A / D conversion unit 21. Control to be stored in the unit 22, control of output of digital data output from the memory unit 22 to the D / A conversion unit 24, and the like are performed. The control unit 23 is controlled by the CPU 61 executing the erasing program 63C, and performs control to erase the digital data stored in the memory unit 22, and functions as a part of the control unit.

  The D / A converter 24 converts the digital data output from the memory unit 22 from digital to analog, reproduces a down-converted signal, and outputs it to the up-converter 25. Thereby, the D / A converter 24 functions as a D / A converter.

The up-converter 25 includes a frequency converter, a BPF (Band Pass Filter), etc., and mixes the local oscillation frequency of the channel desired by the user with the down-converted signal input from the D / A conversion unit 24, and the BPF extra As a result, the IF signal of the channel desired by the user is generated and output to the signal selector 4. Thereby, the up converter 25 functions as a signal generation means.

The tuner 3 is an analog tuner or a digital tuner, and an IF (Intermediate Frequency) of a channel desired by the user from an RF signal input from the antenna 1.
Generate a signal. More specifically, the tuner 3 mixes the local oscillation frequency of the channel desired by the user with the input RF signal to generate an IF signal. The IF signal converted by the tuner 3 is output to the signal selector 4.

  The signal selector 4 is connected to the tuner 3, the up-converter 25, and the like, and based on the presence / absence of a selection signal input by a user pressing a selection key (not shown) of the input unit 7 described later, One of the IF signals input from the up-converter 25 is selected and output to the reproducing unit 5.

  The reproduction unit 5 outputs a video signal and an audio signal obtained by performing demodulation processing, decoding processing, and the like on the IF signal input from the signal selector 4 to the display device 200 and the audio output device 300, respectively.

As shown in FIG. 2, the main control unit 6 includes a CPU (Central Processing Unit) 61,
A RAM (Random Access Memory) 62, a storage unit 63, and the like are provided. As shown in FIG. 2, the main control unit 6 includes a down converter 20, an A / D conversion unit 21, a memory unit 22, a control unit 23, a D / A conversion unit 24, an up converter 25, a tuner 3, a signal selector 4, It is connected to the reproduction unit 5, the input unit 7, and the like, and controls each unit of the television broadcast receiving apparatus 100.

  The CPU 61 controls the entire television broadcast receiving apparatus 100 by reading out a processing program or the like stored in the storage unit 63, developing it in the RAM 62, and executing it.

  The RAM 62 develops the processing program executed by the CPU 61 in the program storage area in the RAM 62, and stores the input data and the processing result generated when the processing program is executed in the data storage area.

  The storage unit 63 includes, for example, a recording medium (not shown) in which programs, data, and the like are stored in advance, and this recording medium is configured by, for example, a semiconductor memory. In addition, the storage unit 63 stores various data, various processing programs, data processed by executing these programs, and the like for realizing the function of the CPU 61 controlling the entire television broadcast receiving apparatus 100. More specifically, for example, as shown in FIG. 2, the storage unit 63 stores an EPG data file 63A, a recording program 63B, an erasing program 63C, a normal broadcast program 63D, a reproduction program 63E, and the like.

  The EPG data file 63A stores EPG (Electric Program Guide) data multiplexed and transmitted on a television broadcast wave. The EPG data includes data such as program title, performer name, channel number, broadcast start time, broadcast end time, and the like. The storage unit 63 functions as a storage unit by storing the EPG data file 63A.

The recording program 63B, for example, causes the CPU 61 to control the down converter 20 to generate a down conversion signal from the RF signal input from the antenna 1, and to control the A / D conversion unit 21 to input from the down converter 20. This is a program that realizes a function of converting the down-converted signal into digital data and storing the digital data in the memory unit 22. More specifically, the recording program 63B controls the CPU 61 to control the down converter 20 to mix the local oscillation frequency with the RF signal input from the antenna 1 so that the lower frequency limit of the target band is around 0 Hz. Then, a down-converted signal is generated by removing an extra signal through the LPF, and the A / D converter 21 is controlled to sample the down-converted signal input from the down-converter 20 and convert the digital data into analog-digital. This is a program that realizes a function of generating and controlling the control unit 23 to add the time information such as the time when digital data and the television broadcast wave of the digital data are received and to store them in the memory unit 22.

  For example, the erasing program 63C refers to the EPG data file 63A to the CPU 61, extracts the program that has been broadcast from the past among the programs that are being broadcast, and is digital past the time when the program was started. This is a program for realizing a function of deleting data from the memory unit 22. More specifically, the erasure program 63C causes the CPU 61 to refer to the EPG data file 63A to search for the broadcast start time of each program being broadcast, and broadcasts from the past among the programs being broadcast. Is a program that realizes a function of deleting the past digital data from the memory unit 22 by controlling the control unit 23 and extracting the past program from the time when the program was started. The CPU 61 functions as part of the control means by executing the erasing program 63C.

  The normal broadcast program 63D, for example, causes the CPU 61 to control the tuner 3 to generate the IF signal of the channel desired by the user from the RF signal input from the antenna 1, and to control the signal selector 4 from the tuner 3. The IF signal is output to the playback unit 5, and the playback unit 5 is controlled to perform a demodulation process or the like on the IF signal input from the signal selector 4. 200, a program for realizing a function of outputting to the audio output device 300.

  The reproduction program 63E, for example, causes the CPU 61 to control the control unit 23 to output the digital data stored in the memory unit 22 to the D / A conversion unit 24 and to control the D / A conversion unit 24, The digital data output from the memory unit 22 is converted from digital to analog to reproduce the down-converted signal, the up-converter 25 is controlled, and the channel desired by the user is determined from the down-converted signal input from the D / A converter 24. An IF signal is generated, the signal selector 4 is controlled, and the IF signal input from the up-converter 25 is output to the reproduction unit 5. The reproduction unit 5 is controlled, and the IF signal input from the signal selector 4 is controlled. The function of performing demodulation processing and the like and outputting the obtained video signal and audio signal to the display device 200 and the audio output device 300, respectively. Is a program to be.

  The input unit 7 includes keys and the like for inputting input signals related to various operations to the television broadcast receiving apparatus 100. When operated by the user, input signals for various operations are input to the television broadcast receiving apparatus 100. The The input unit 7 also includes a selection key (not shown) for the user to select a program stored in the memory unit 22.

  Next, the operation of the television broadcast receiving apparatus 100 according to the embodiment of the present invention configured as described above will be described with reference to the flowcharts shown in FIGS.

  First, the operation from the reception of the television broadcast wave of the television broadcast receiving apparatus 100 to the storage of digital data in the memory unit 22 will be described with reference to the flowchart shown in FIG.

  First, the CPU 61 executes the recording program 63B to control the down converter 20 to generate a down-converted signal from the entire band of the RF signal input from the antenna 1 (step S1).

  Next, the CPU 61 controls the A / D converter 21 to sample the entire band of the down-converted signal input from the down-converter 20 at a frequency that is at least twice the highest frequency of the down-converted signal. Conversion is performed to generate digital data (step S2).

  Next, the CPU 61 controls the control unit 23 so that the digital data input from the A / D conversion unit 21 and the time information such as the time when the television broadcast wave of the digital data is received are stored in the memory unit 22. Store (step S3).

  Next, an automatic erasing operation of digital data stored in the memory unit 22 of the television broadcast receiving apparatus 100 will be described with reference to a flowchart shown in FIG.

  First, the CPU 61 executes the erasing program 63C to determine whether or not a predetermined time has elapsed since the previous automatic erasing process (step S101).

  In step S101, when the CPU 61 determines that the predetermined time has not elapsed since the previous automatic erasure process (step S101; No), the CPU 61 waits until the predetermined time elapses.

  In step S101, if the CPU 61 determines that a predetermined time has elapsed since the previous automatic erasure process (step S101; Yes), the CPU 61 refers to the EPG data file 63A and is in the program being broadcast. The most broadcasted program is extracted (step S102).

  Next, the CPU 61 determines whether or not the program extracted in step S102 is the same as the program extracted when the previous automatic deletion process was performed (step S103).

  If the CPU 61 determines in step S103 that the program extracted in step S102 is the same as the program extracted when the previous automatic deletion process was performed (step S103; Yes), the process returns to step S101.

  In step S103, when the CPU 61 determines that the program extracted in step S102 is different from the program extracted when the previous automatic deletion process was performed (step S103; No), the CPU 61 starts broadcasting the extracted program. Digital data older than the time is deleted from the memory unit 22 (step S104).

  FIG. 5 shows the EPG data file 63 </ b> A and digital data stored in the memory unit 22. In FIG. 5, the stored digital data portion is indicated by a solid line, the erased digital data portion is indicated by a diagonal line, and the digital data portion to be stored is indicated by a dotted line. As shown in FIG. 5, when the current time is t1, from the EPG data file 63A, the programs being broadcast at that time are the program B, the program D, and the program F. It is determined that the program B is being broadcast (FIG. 5A). Then, when the CPU 61 executes the erasing program 63C, the program B and the broadcast start time of the program B are extracted from the EPG data file 63A, and the past digital data is erased from the memory unit 22 from the broadcast start time ( FIG. 5B).

  Also, as shown in FIG. 5, when the current time is t2, the broadcast of program B has ended at that time from the EPG data file 63A, and the programs D, E and E are being broadcast. F, and it is determined that the program F is the most broadcasted from the past (FIG. 5 (a)). Then, when the CPU 61 executes the erasing program 63C, the program F and the broadcast start time of the program F are extracted from the EPG data file 63A, and the past digital data is erased from the broadcast time from the memory unit 22 (FIG. 5 (c)).

Next, the output of the currently received broadcast of the television broadcast receiver 100 and the memory unit 2
The operation of outputting the data stored in 2 will be described with reference to the flowchart shown in FIG.

  First, the CPU 61 controls the tuner 3 by executing the normal broadcast program 63D, and mixes the local oscillation frequency of the channel selected by the user with the RF signal input from the antenna 1 to generate an IF signal. Then, the signal selector 4 is controlled to output the IF signal input from the tuner 3 to the reproduction unit 5, and the reproduction unit 5 is controlled to perform demodulation processing or the like on the IF signal input from the signal selector 4. The video signal and the audio signal obtained by the operation are output to the display device 200 and the audio output device 300, respectively (step S201).

  Next, the CPU 61 determines whether the user wants to watch the currently broadcast program from the start of broadcasting based on whether or not a selection signal input by pressing a selection key (not shown) of the input unit 7 is pressed. It is determined whether or not (step S202).

  In step S202, when the CPU 61 determines that no selection signal is input from the input unit 7 (step S202; No), the process returns to step S201.

  On the other hand, if the CPU 61 determines in step S202 that a selection signal has been input from the input unit 7 (step S202; Yes), the CPU 61 controls the control unit 23 by executing the reproduction program 63E. Then, the digital data stored in the memory unit 22 is output to the D / A conversion unit 24, and the D / A conversion unit 24 is controlled to convert the digital data from digital to analog to reproduce the down-converted signal. (Step S203).

  Next, the CPU 61 controls the up-converter 25 to mix the local oscillation frequency of the channel desired by the user with the down-converted signal that has been converted from digital to analog by the D / A converter 24, and outputs an extra signal using the BPF. By removing, the IF signal of the channel desired by the user is generated and output to the signal selector 4 (step S204).

  Next, the CPU 61 controls the signal selector 4 to cause the reproduction unit 5 to output the IF signal input from the up-converter 25 (step S205).

  Next, the CPU 61 controls the playback unit 5 to display a video signal and an audio signal obtained by performing demodulation processing or the like on the IF signal input from the signal selector 4, respectively, as a display device 200 and an audio output device. The data is output to 300 (step S206).

  According to the television broadcast receiver 100 according to the first embodiment described above, the broadcast wave signal of the television broadcast wave is converted from analog to digital by the A / D converter 21, and the A / D converter 21 Since the digital data converted by the / D conversion unit 21 is stored, the data of the entire band of the television broadcast wave is converted into an IF signal by the tuner and converted into an analog digital signal without being demodulated, etc., and the memory unit 22 Therefore, the data of the entire band of the television broadcast wave can be stored in the memory unit 22 without providing a tuner for each channel.

Further, EPG data included in the television broadcast wave is stored in the EPG data file 63A stored in the storage unit 63, and the CPU 61 executes the erasing program 63C, thereby referring to the EPG data stored in the EPG data file 63A. Then, the program that has been broadcast from the past is extracted from the programs that are being broadcast, and digital data that is past from the time when the program was started is erased from the memory unit 22. The data is reliably stored in the memory unit 22, and the data of the finished program is sequentially deleted from the memory unit 22, so that the data of the entire band of the television broadcast wave can be efficiently stored.

  Further, since the A / D converter 21 performs sampling at a frequency that is at least twice the highest frequency of the broadcast wave signal, it is possible to prevent deterioration when the broadcast wave signal is reproduced.

Also, the digital data stored in the memory unit 22 is converted from digital to analog by the D / A conversion unit 24 to reproduce the broadcast wave signal, and the up-converter 25 is converted from digital to analog by the D / A conversion means and reproduced. Since the IF signal of the channel desired by the user is generated from the broadcast wave signal, the broadcast wave signal is reproduced from the digital data stored in the memory unit 22 to generate the IF signal of the channel desired by the user. Can do.
(Second Embodiment)
Next, the best mode for carrying out the television broadcast receiving apparatus 400 according to the second embodiment of the present invention will be described in detail.

  In the television broadcast receiving apparatus 400 according to the second embodiment, as shown in FIG. 7, only the configuration of the broadcast wave storage unit 2A, the signal selector 40, and the tuner 30 is the television broadcast receiving apparatus 100 of the first embodiment. Therefore, the same components as those of the television broadcast receiving device 100 of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The broadcast wave storage unit 2A includes a down converter 20, an A / D conversion unit 21, a memory unit 22, a control unit 23, a D / A conversion unit 24, an up converter 250, and the like, and is controlled by the main control unit 6. According to the signal, digital data generated by performing a digital-analog conversion process or the like on the television broadcast wave received by the antenna 1 is stored in the memory unit 22 and an RF signal is generated from the digital data stored in the memory unit 22 To do.

  The up-converter 250 amplifies the down-converted signal output from the D / A converter 24 by mixing the local oscillation frequency, reproduces the RF signal, and outputs the RF signal to the signal selector 40.

  The signal selector 40 is connected to the antenna 1, the up-converter 250, etc., and the antenna 1 or the up-converter is selected based on the presence / absence of a selection signal input by the user pressing a selection key (not shown) of the input unit 7. One of the RF signals input from 250 is selected and output to the tuner 30.

The tuner 30 is an analog tuner or a digital tuner, and generates an IF (Intermediate Frequency) signal of a channel desired by the user from the RF signal input from the signal selector 40. More specifically, the tuner 30 mixes a local oscillation frequency of a channel desired by the user with the input RF signal to generate an IF signal. The IF signal converted by the tuner 30 is output to the reproduction unit 5.

  In the television broadcast receiving apparatus 400 according to the second embodiment described above, the same effect as that of the television broadcast receiving apparatus 100 according to the first embodiment can be obtained.

  The television broadcast receiving apparatus according to the present invention is not limited to the above embodiment.

  For example, in this embodiment, the A / D conversion unit 21 samples and converts the down-converted signal obtained by down-converting the RF signal of the television broadcast wave into digital data. The signal may be sampled as it is and converted into digital data.

  In addition, the broadcast wave storage units 2 and 20 store the data of the entire band of the RF signal, but the band of the RF signal to be stored may be limited by providing a BPF or the like as necessary.

In the present embodiment, the digital data stored in the memory unit 22 is automatically erased every predetermined time. However, the timing at which the automatic erase operation is performed is not limited to this. For example, The program may be performed every time the program ends.

It is a block diagram which shows the principal part structure of the television broadcast receiver which concerns on the 1st Embodiment of this invention. It is a block diagram explaining the relationship between the main control part which concerns on the 1st Embodiment of this invention, and each part. It is a flowchart explaining operation | movement of the television broadcast receiver which concerns on the 1st Embodiment of this invention. It is a flowchart explaining operation | movement of the television broadcast receiver which concerns on the 1st Embodiment of this invention. It is a figure explaining the automatic erasure | elimination operation | movement of the digital data of the memory part of the television broadcast receiver which concerns on the 1st Embodiment of this invention. It is a flowchart explaining operation | movement of the television broadcast receiver which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the principal part structure of the television broadcast receiver which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

21 A / D converter (A / D converter)
22 Memory part 23 Control part (control means)
24 D / A converter (D / A converter)
25 Upconverter (Signal generation means)
61 CPU (control means)
63 Storage section (storage means)
63A EPG data file (storage means)
63C erasing program (control means)
100,400 Television broadcast receiver

Claims (4)

A / D conversion means for analog-digital conversion of a broadcast wave signal of a television broadcast wave or a broadcast wave signal subjected to frequency conversion;
A memory unit for storing digital data converted by the A / D conversion unit;
Storage means for storing EPG data included in the television broadcast wave;
By referring to the EPG data stored in the storage means, a program that has been broadcast from the past is extracted from among the programs that are being broadcast, and digital data that is past from the time when the program was started is stored in the memory unit. Control means for erasing from,
D / A conversion means for digital-analog conversion of digital data stored in the memory unit;
A signal generation means for generating an IF or RF signal of a channel desired by the user from the broadcast wave signal digital-analog converted by the D / A conversion means,
The television broadcast receiver according to claim 1, wherein the A / D conversion means performs sampling at a frequency that is at least twice the maximum frequency of a broadcast wave signal or a frequency-converted broadcast wave signal. A / D conversion means for analog-digital conversion of a broadcast wave signal of a television broadcast wave or a broadcast wave signal subjected to frequency conversion;
A memory unit for storing digital data converted by the A / D conversion unit;
Storage means for storing EPG data included in the television broadcast wave;
By referring to the EPG data stored in the storage means, a program that has been broadcast from the past is extracted from among the programs that are being broadcast, and digital data that is past from the time when the program was started is stored in the memory unit. Control means for erasing from,
A television broadcast receiving apparatus comprising:   3. The television broadcast receiving apparatus according to claim 2, wherein the A / D conversion means performs sampling at a frequency that is at least twice the maximum frequency of the broadcast wave signal or the frequency-converted broadcast wave signal. D / A conversion means for digital-analog conversion of digital data stored in the memory unit;
A signal generation means for generating an IF or RF signal of a channel desired by the user from the broadcast wave signal digital-analog converted by the D / A conversion means;
The television broadcast receiver according to claim 2, further comprising:

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