JP2004304383A - Broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broadcast receiver capable of processing corresponding channel selection after channel conversion even when there is a change in the channel of the terrestrial wave analog broadcasting accompanying the introduction of the terrestrial wave digital broadcasting. <P>SOLUTION: In a second memory 22, a position-channel setting table associated with an area number is stored. Further, in the second memory 22, a schedule information table is stored along with the position-channel setting table for each area. The schedule information is transition information of an analog channel determined in accordance with the start of the terrestrial wave digital broadcasting in a corresponding area. For example, a user operates a conversion button provided on a remote control transmitter 19, a sub CPU 21 executes processing for reflecting the contents of the schedule information table on the position-channel setting table. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
[Industrial applications]
The present invention relates to a broadcast receiving device capable of receiving a television broadcast.
[0002]
[Prior art]
A digital broadcast receiving apparatus that receives digital broadcast using terrestrial waves selects an arbitrary broadcast wave from a plurality of broadcast waves received through a terrestrial antenna using a digital tuner, and selects a plurality of broadcast waves included in the selected broadcast wave. An arbitrary channel is selected from these channels by demultiplex processing, a digital signal of the selected channel is extracted, and a video / audio signal is output by decoding the digital signal. Further, there is known a technique capable of receiving both analog broadcasting and terrestrial digital broadcasting, and eliminating the influence of modulation disturbance or the like due to a digital broadcasting channel (see Patent Document 1).
[0003]
[Patent Document 1]
JP 2002-374469 A
[Problems to be solved by the invention]
Meanwhile, terrestrial digital broadcasting is scheduled to start broadcasting in Japan in 2003. The channel used for terrestrial digital broadcasting is a UHF (Ultra High Frequency) band. In this UHF band, channels of conventional terrestrial analog broadcasting and terrestrial digital broadcasting are mixed. Channels to be allocated will mainly be 13 to 32 channels that are rarely used in terrestrial analog broadcasting.
[0005]
However, if channels cannot be allocated for terrestrial digital broadcasting in a certain area, the channels of terrestrial analog broadcasting are changed (this change is hereinafter referred to as analog-to-analog conversion). For example, if terrestrial digital broadcasting uses 20 ch, terrestrial analog broadcasting of broadcasting station A, which previously used 20 ch, moves to, for example, 50 ch. Also, when 20 ch is set in position 8 of the receiving apparatus, it is necessary to reset 50 ch in position 8 in order to continuously watch the program of the A broadcast station at the same position. For this setting, for example, a trader (a dealer or the like) visits each home and spends a great deal of money and time. Of course, the user can perform the setting operation by himself / herself with reference to the instruction manual, but since the setting operation is complicated, the possibility of secondary failure due to inadequate operation is also predicted.
[0006]
The present invention has been made in view of the above circumstances, and provides a broadcast receiving apparatus capable of performing a channel selection process corresponding to a channel conversion after a channel change even when a channel of a terrestrial analog broadcast is changed with the introduction of digital terrestrial broadcasting. The purpose is to do.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, the broadcast receiving apparatus of the present invention has a first storage means for storing correspondence information between a channel and a position number, and the broadcast of each channel is changed to which channel for each region. The second storage means in which the schedule information is stored, and the contents of the second storage means or based on both information in the first storage means and the second storage means after an operation indicating permission of channel conversion by the user. And a channel selection unit that performs a channel selection process corresponding to the channel after the channel conversion based on the information in the first storage unit rewritten based on the information.
[0008]
With the above configuration, even when analog-to-analog conversion is performed with the introduction of digital terrestrial broadcasting, channel selection processing corresponding to channel conversion can be performed using the schedule information.
[0009]
A configuration may be made so that a channel selection process corresponding to a plurality of positions is collectively performed after channel conversion.
[0010]
A configuration may be made so that a channel selection process corresponding to each position is performed after channel conversion. In such a configuration, the presence of the channel selected by the position selection operation by the user is determined, and if it is determined that the channel is not the presence of the channel, it is determined whether the channel exists as the schedule information. A message for prompting conversion may be displayed on the screen, and after the user indicates that the channel conversion is permitted, a channel selection process corresponding to the position after the channel conversion may be performed.
[0011]
Further, in the broadcast receiving apparatus having these configurations, schedule information indicating the schedule of which channel the broadcast of each channel is changed for each region is stored, and the current date and time are set to the date and time indicated by the schedule information. The elapsed time may be configured as a condition for performing the corresponding channel selection processing after the channel conversion.
[0012]
In addition, when the channel selected by the corresponding channel selection processing after channel conversion is not tuned, a message asking whether to return to the original state is displayed on the screen, and the user performs an operation indicating permission to return. May be configured to perform channel selection processing based on information before channel conversion.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. Here, a digital / analog broadcast receiving apparatus that receives both terrestrial digital broadcast and terrestrial analog broadcast is illustrated.
[0014]
FIG. 1 is a block diagram showing a broadcast receiving apparatus 30 of this embodiment for receiving both terrestrial digital broadcasting and terrestrial analog broadcasting, and FIG. 2 assumes a case where a channel is changed by analog-to-analog conversion. FIG. 3 is a flowchart showing processing corresponding to the analog-analog conversion.
[0015]
In FIG. 1, a terrestrial antenna 1 receives a terrestrial broadcast wave and supplies a received signal to a terrestrial digital tuner 2 and a terrestrial analog tuner 4. Each tuner includes a channel selection processing circuit, a mixer (mixer), and the like. The mixer mixes the signal of the desired channel and the local oscillation signal to generate an intermediate frequency signal. The circuit that generates the local oscillation signal includes, for example, a variable-capacitance diode whose capacitance changes according to the applied voltage, and changes it according to the frequency of the desired channel so that a signal of a constant intermediate frequency is output from the mixer. Generated local oscillation signal. The tuning processing circuit receives data of an applied voltage (tuning voltage) corresponding to each channel from, for example, the first memory 13 or the second memory 22, and converts the data into an analog signal (voltage conversion) by a D / A converter (not shown). ) To give the variable capacitance diode.
[0016]
The terrestrial digital tuner 2 extracts a signal of a specific frequency from high-frequency digital modulation signals including video and audio data by the above-described channel selection processing. Further, the terrestrial digital tuner 2 includes a deinterleave circuit, an error correction circuit, a demodulation circuit, and the like, thereby demodulating the selected digital modulation signal and outputting a transport stream.
[0017]
The demultiplexer (DEMUX) 6 converts the transport stream received from the terrestrial digital tuner 2 into a video stream of MPEG2 (Moving Picture Experts Group2), an audio stream, and PSI / SI (Program Specific Information / Service). Decrypt. The demultiplexer 6 supplies the video stream and the audio stream to the AV decoder 7, and supplies the service information included in the PSI / SI to the main CPU 18. As described above, a plurality of channels are multiplexed in the transport stream, and a process for selecting an arbitrary channel from among the channels is performed by selecting an arbitrary channel from the PSI / SI in the transport stream. It becomes possible by extracting data such as which packet ID is multiplexed.
[0018]
The AV decoder 7 includes a video decoder that decodes a video stream and an audio decoder that decodes an audio stream. The video decoder obtains a quantization coefficient and a motion vector by decoding the input variable-length code, and performs inverse DCT transform, motion compensation control based on the motion vector, and the like. The audio decoder decodes the input coded signal to generate audio data. The video data generated by the decoding is output to the video processing circuit 8, and the audio data is output to the audio processing circuit 9.
[0019]
The video processing circuit 8 receives the video data from the AV decoder 7 and performs D / A conversion to generate a video signal. The audio processing circuit 9 receives the audio data output from the AV decoder 7, performs D / A conversion, and generates an analog audio signal.
[0020]
The video / audio processing unit 5 demodulates the received signal supplied from the terrestrial analog tuner 4 to generate a video signal and an audio signal.
[0021]
The OSD (on-screen display) circuit 15 outputs a video signal based on the bitmap data of the character information specified by the main CPU 18 to the adder 16 or 17. The adders 16 and 17 incorporate a video signal based on the bitmap data into a received video signal, and supply the video signal to the drive circuit 10. The OSD circuit 15 can display a menu screen, various setting screens, and the like.
[0022]
The picture tube 11 performs video display by using video signals (R, G, B signals and vertical / horizontal synchronization signals) supplied from the drive circuit 10. Further, the speaker 12 inputs a voice signal and outputs a voice.
[0023]
The main CPU 18 controls the terrestrial digital tuner 2 such as channel selection and station channel search, control of writing / reading of information in the first memory (RAM, ROM, EEPROM, etc.) 13, control of the demultiplexer 6, AV The control for the decoder 7, the control for the OSD circuit 15, the command for the sub CPU 21 and the like are performed.
[0024]
The remote control transmitter 19 is a transmitter for sending a command to the broadcast receiving device 30. When a key (not shown) provided on the remote control transmitter 19 is operated, a signal light (remote control signal) indicating a command corresponding to the key is transmitted from a light emitting unit (not shown). The remote control light receiver 20 receives the signal light, converts the signal light into an electric signal, and supplies the electric signal to the sub CPU 21.
[0025]
The sub CPU 21 performs a process of inputting a remote control signal from the remote control transmitter 19 or a signal from a key operation of an operation unit (not shown) to notify the main CPU 18 and the like, and also performs a terrestrial analog broadcast presence / absence determination process. Is also to do. The station / non-station determination processing can be performed based on, for example, whether or not a horizontal synchronization signal is included in a video signal after detection in a reception channel at a certain value or more.
[0026]
As shown in FIG. 2A, a second memory (EEPROM or the like) 22, which is a rewritable nonvolatile memory, stores a position-channel setting table 22A associated with an area code. Further, the second memory 22 stores a schedule information table 22B accompanying the position-channel setting table 22A of each area. The schedule information is the transition information of the analog channel that has been determined with the start of the terrestrial digital broadcasting in the corresponding area. Then, as shown in FIG. 2B, a process of reflecting the contents of the schedule information table 22B on the position-channel setting table 22A is executed by the sub CPU 21. The schedule information table 22B may be stored in the ROM. The position-channel setting table 22A is also stored in the ROM, and the second memory 22 stores change content information (for example, information such as "refer to the schedule information table 22B for position 1"). You may.
[0027]
In addition, normally, channel setting is performed based on the area code, but channel setting can also be performed by a user's individual setting operation. When the individual setting operation is performed, the sub CPU 21 generates a correspondence table between the channel and the position number based on the channel setting and stores the table in the second memory 22.
[0028]
As shown in the flowchart of FIG. 3, the broadcast receiving device 30 determines a channel change instruction by a remote control signal or the like (step S1), and if there is a change instruction, performs a tuning process for receiving the channel (step S2). . Then, it is determined whether or not the tuned channel is a station (step S3). If not, it is determined whether schedule information exists (step S4). Here, it is assumed that the channel currently set by the user is as shown in the position-channel setting table 22A shown in FIG. Then, it is assumed that a command to select the position 1 has been received, but the corresponding channel 15ch has not been stationed. In this case, the sub CPU 21 determines whether or not there is schedule information for channel 15 in the schedule information table 22B associated with the position-channel setting table 22A. In the case of FIG. 2, there is schedule information indicating that the change destination of 15ch is 40ch, so that a determination of YES is made in step S4.
[0029]
If a determination of YES is made in step S4, the OSD circuit 15 is operated, and for example, a message such as "Channel change destination is 40ch in an analog-to-analog conversion schedule. Do you want to change?" OSD display. Then, it is determined whether or not a change permission command has been issued by the user (step S6). When the user performs the “YES” button operation (YES in step S6), the channel conversion process, that is, as shown in FIG. 2B, the position-channel setting table 22A is set based on the schedule information table 22B. The rewriting process or the information writing process of referring to the schedule information table 22B for the position 1 is performed (step S7).
[0030]
In the above processing example, when the stationless channel is selected and the corresponding schedule information is present, a message prompting a change is displayed. The conversion process is performed. For example, a batch conversion button is provided on the remote control transmitter 19, and when this button is operated, the position-channel setting table 22A is batch-processed based on the schedule information table 22B. A process of rewriting or a process of writing information such as referring to the schedule information table 22B for all corresponding positions may be performed. However, it is rare that the analog-analog conversion time of each channel is the same day, and it is desirable to perform individual channel conversion as shown in the flowchart of FIG.
[0031]
If the schedule of the analog-analog conversion has been determined, this schedule information may be stored in the memory as schedule information. Then, for example, in step S4 shown in the flowchart of FIG. 3, if there is schedule information on the channel change destination and the current date and time is after the date and time according to the schedule information, the process proceeds to step S5, and the message It is preferable to display the message to prompt the user for a change instruction. If the current date and time is later than the date and time according to the schedule information and the channel to be changed has not been changed, the channel conversion is performed during a certain period (for example, about 10 seconds) when the television is turned on. A prompting message may be displayed on the OSD. Also, depending on the time zone, there is a possibility that the radio wave is stopped, and in this case, it may be determined that the station is stationed even if it is stationed. Even if it is determined that there is no station, a series of processes related to the channel conversion may not be performed.
[0032]
Further, it may be determined whether or not the reception channel after the conversion processing in step S7 of the above-described flowchart is a station. When the channel selected by the corresponding channel selection processing after channel conversion is not tuned, a message asking whether to return to the original state is displayed on the screen, and the user performs an operation indicating permission to return. May be configured to perform channel selection processing based on information before channel conversion. In FIG. 2B, if the channel of 40 ch is selected while the position 1 is selected, it can be determined that the original channel corresponding to 40 ch is 15 ch based on the schedule information table 22B. What is necessary is just to process so that 15ch may correspond to position 1.
[0033]
【The invention's effect】
As described above, according to the present invention, even when the channel of the terrestrial analog broadcast is changed due to the introduction of the terrestrial digital broadcast, it is possible to perform the channel selection process corresponding to the channel conversion. Play.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a digital / analog broadcast receiving apparatus according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing table contents assuming a case where a channel is changed in an analog-to-analog conversion.
FIG. 3 is a flowchart showing a process corresponding to an analog-analog conversion.
[Explanation of symbols]
Reference Signs List 1 antenna 2 terrestrial digital tuner 4 terrestrial analog tuner 5 analog video / audio processing unit 6 demultiplexer (DEMUX)
7 AV decoder 15 OSD circuit 16 Adder 17 Adder 18 Main CPU
21 Sub CPU
22 Second memory

Claims (6)

First storage means for storing correspondence information between channels and position numbers; second storage means for storing schedule information as to which channel the broadcast of each channel is to be changed for each region; After the operation indicating permission of the conversion, after the channel conversion based on both the information of the first storage means and the second storage means or based on the information of the first storage means rewritten based on the contents of the second storage means, And a tuning means for performing a tuning process. 2. The broadcast receiving apparatus according to claim 1, wherein a corresponding channel selection process is performed after channel conversion for a plurality of positions at once. 2. The broadcast receiving apparatus according to claim 1, wherein a corresponding channel selection process is performed after channel conversion for each position. 4. The broadcast receiving apparatus according to claim 3, wherein the station selected for the channel selected by the position selection operation by the user is determined to be stationed, and when it is determined that the channel is not stationed, whether the channel is present as the schedule information is determined. Judgment, when present, a message prompting channel conversion is displayed on the screen, and after the user performs an operation indicating permission of channel conversion, channel selection processing corresponding to the position after the channel conversion is performed. Broadcast receiver. The broadcast receiving apparatus according to any one of claims 1 to 4, wherein schedule information indicating a schedule to which a broadcast of each channel is changed for each region is stored, and the current date and time are set to the schedule. A broadcast receiving apparatus characterized in that the passage of the date and time indicated by the information is set as a condition for performing a corresponding tuning process after channel conversion. 6. The broadcast receiving apparatus according to claim 1, wherein a message asking whether to return to an original state when the channel selected by the corresponding channel selection processing after channel conversion is not tuned. Is displayed on the screen, and when the user performs an operation indicating return permission, a channel selection process based on information before channel conversion is performed.

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