JP2004343235A - Digital broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital broadcast receiver capable of receiving broadcast at the outside of an area and receiving desired broadcast without a problem even in the case that a channel number is in duplicate in a plurality of broadcast programs. <P>SOLUTION: A CPU 13 allows a tuner 2 to execute scan processing of the terrestrial digital broadcast, creates a table wherein broadcast programs are correspondent to channel numbers on the basis of broadcast information multiplexed on the broadcast program detected by the scanning and stores the table to a memory 14. Further, the CPU 13 carries out processing of selecting a broadcast station corresponding to a channel number entered by a user through the operation of a remote control transmitter 10. Moreover, the CPU 13 distinguishes broadcast programs wherein a channel number is in duplicate by providing a different branch number to the channel number when the channel number is in duplicate in a plurality of the broadcast programs, the CPU 13 selects any broadcast station by the entry of the branch number by the user, and when no entry of the branch number exists even after a lapse of a prescribed time, the CPU 13 automatically receives the broadcast program with the prescribed branch number. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
[Industrial applications]
The present invention relates to a digital broadcast receiving device for receiving digital broadcast.
[0002]
[Prior art]
A digital broadcast receiving device that receives digital broadcasts using satellites or terrestrial waves selects an arbitrary broadcast wave from a plurality of broadcast waves received through a satellite antenna or a terrestrial antenna with a digital tuner, and selects the selected broadcast wave. , An arbitrary channel is selected from the plurality of channels included in the above by demultiplex processing, a digital signal of the selected channel is extracted, and a video / audio signal is output by decoding the digital signal.
[0003]
By the way, in such digital broadcasting, a key (one-touch key, preset key, etc.) is assigned to each broadcaster, and a desired broadcaster's channel can be directly selected by operating the assigned key. Is considered. As a related art related to this, there is a technique of selecting one channel from a plurality of channels of one broadcaster assigned to a predetermined button (see Patent Document 1).
[0004]
Also, in terrestrial digital broadcasting, broadcast information (area identifier, service type, broadcast station identification, service number) is multiplexed on a broadcast wave, and a three-digit channel number is calculated by the following formula and assigned to each broadcast. A technique is used.
[0005]
3-digit number = (service type × 200) + (remote key ID × 10) + service number + 1
[0006]
Broadcast information: The broadcast information is multiplexed with radio waves transmitted from a broadcast station, and the receiver determines various attributes of the broadcast station based on the multiplexed information.
Region identifier: This is for associating a broadcast with a region, and the receiver compares the value set for specifying the installation location with the region identifier, and the broadcast is broadcast for this region. It is determined whether or not.
Service type: 0-7
It indicates whether the broadcast is a TV-type service or a data-type broadcast.
Remote control key ID: 0 to 12
This number is assigned to each broadcast station in the area, and is also used to assign one-touch keys to a remote controller. It is unique within a region, but the same number may be used in other regions.
Service number: 0-7
A number set by the broadcast station for identification when the broadcast station operates a plurality of broadcasts.
[0007]
[Patent Document 1]
JP 10-149451 A
[Problems to be solved by the invention]
However, in a terrestrial digital broadcast receiving device, there is a possibility that a broadcast outside the region may be received depending on the installation location. Therefore, the three-digit number calculated by the above formula is duplicated in a plurality of broadcasts. There may be cases where it gets lost. Therefore, even if the user inputs a three-digit channel number for channel selection, it is unclear which broadcast is to be selected.
[0009]
In view of the above circumstances, the present invention provides a digital broadcast receiving apparatus capable of receiving a broadcast outside a region and receiving a desired broadcast without any problem even when a channel number is duplicated in a plurality of broadcasts. The purpose is to provide.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a digital broadcast receiving apparatus of the present invention scans a broadcast transmitted from a terrestrial digital broadcast station, and based on information multiplexed on the broadcast detected by the scan. A digital broadcast receiving apparatus comprising: means for associating a broadcast with a channel number; and means for selecting a broadcast corresponding to a channel number input by a user, wherein the channel number is duplicated in a plurality of broadcasts. Means for distinguishing the overlapping broadcasts by attaching different branch numbers to the channel number, means for selecting a broadcast corresponding to a branch number input by a user operation, and Storage means for storing the branch number; time measurement means for measuring time after the overlapping channel number is input; Control means for selecting a broadcast of the branch number stored in the storage means when the input of the branch number is not detected even when the elapse of a predetermined time is measured by the time measuring means. It is characterized by.
[0011]
With the above configuration, a different branch number is assigned to each of a plurality of broadcasts having the same channel number. Then, when a predetermined time elapses after the input of the overlapping channel number is performed, the broadcast of the previously selected branch number is automatically selected.
[0012]
When the input of the branch number is not detected even when the predetermined time has elapsed by the time measuring unit and the branch number is not stored in the storage unit, a display prompting the user to input the branch number is displayed. Means may be provided. In addition, when the input of the branch number is not detected even when the predetermined time has elapsed by the time measuring means, and the branch number is not stored in the storage means, a predetermined reference branch number is determined. It may be configured to select a broadcast.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a digital broadcast receiving apparatus according to an embodiment of the present invention will be described with reference to FIGS.
[0014]
In FIG. 1, a terrestrial antenna 1 is arranged outdoors in a predetermined direction, and receives a terrestrial digital broadcast signal. The terrestrial antenna 1 supplies a received signal to a terrestrial digital tuner 2.
[0015]
The terrestrial digital tuner 2 extracts a signal of a specific frequency from high-frequency digital modulation signals including video and audio data. The terrestrial digital tuner 2 includes a demodulation circuit, a deinterleave circuit, an error correction circuit, and the like, and demodulates a selected digital modulation signal to output a transport stream.
[0016]
The demultiplexer (DEMUX) 3 converts the transport stream into a video stream of MPEG2 (Moving Picture Experts Group2), an audio stream, PSI / SI (Program Specific Information / Service Information), and broadcast information (region identifier, type of area). , Broadcasting station identification, service number). The demultiplexer 3 supplies a video stream and an audio stream to the AV decoder 4, and supplies PSI / SI, broadcast information, and the like to the CPU 13.
[0017]
The AV decoder 4 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 5, and the audio data is output to the audio processing circuit 6.
[0018]
The video processing circuit 5 receives the video data from the AV decoder 4, performs D / A conversion, and converts the data into, for example, a composite video signal. The audio processing circuit 6 receives the audio data output from the AV decoder 4 and performs D / A conversion to generate, for example, a right (R) sound analog signal and a left (L) sound analog signal.
[0019]
The video output circuit 7 and the audio output circuit 8 include an output resistor, an amplifier, and the like. The AV output terminal 9 is provided with an output unit (a set of left and right audio output terminals and a video output terminal and the like). The output unit includes a monitor 16 having a CRT 16a and a speaker 16b by a video / audio code 17. Connected.
[0020]
The OSD (on-screen display) circuit 12 outputs to the adder 20 video data based on character information and color information instructed by the CPU 13 to output. The adder 20 performs a process of incorporating the video data into the received video data output from the AV decoder 4. The OSD circuit 12 can display a menu screen, various setting screens, and the like.
[0021]
As shown in FIG. 2, the remote control transmitter 10 includes various keys and sends various commands to the broadcast receiving device 30. When the keys are operated, the commands corresponding to the keys mean. Signal light (remote control signal) is transmitted from the light emitting unit. The remote control light receiver 11 receives the signal light, converts the signal light into an electric signal, and supplies the electric signal to the CPU 13. In this embodiment, the keys provided with the numbers “1” to “12” provided on the remote control transmitter 10 are used as one-touch keys, and a broadcast is assigned to each one-touch key. In addition, when the "numeric input" key of the remote control transmitter 10 is operated, a key operation for three digits is performed subsequently so that channel selection by channel number input can be performed.
[0022]
The memory (for example, RAM, EEPROM, flash memory, etc.) 14 includes information for displaying an EPG screen, a channel table (a channel list in which frequency information, a broadcast station name, and the like correspond to a remote control key ID and a channel number), A database, etc., in which broadcasts in each region of the whole country are associated with remote control key IDs, and the like are stored.
[0023]
The CPU 13 performs overall control in the digital broadcast receiving apparatus 30. In particular, the processing according to the present invention includes channel scan processing, broadcast information acquisition processing in this scan, one-touch key assignment processing, one-touch key operation , An OSD display process of the contents of the channel table, a tuning process for input of a three-digit number, and the like.
[0024]
The digital broadcast receiving apparatus 30 performs a process of scanning a target frequency band to detect a receivable broadcast at the time of start-up (or only once at the time of installation), and transmits broadcast information multiplexed to each broadcast. The channel table is created by associating the information required for channel selection of the broadcast with the channel number by the above-described calculation formula, and the channel table is stored in the memory 14. At this time, it is determined whether or not the calculated channel number is duplicated in a plurality of broadcasts. A branch number is not added to a channel number which is not duplicated, and 0, 1, or 2 is assigned to a duplicated broadcast. Branch numbers are assigned (assigned) in the order of 2,. In addition, the initial value of the branch number storage area is set to “FF” with, for example, 8 bits. If the initial value is “FF”, it can be determined that there is no branch number. Of course, the initial value of the branch number storage area may be set to “00” with, for example, 8 bits. If “00” remains, no branch number is assigned, and “01” and subsequent may indicate that there is duplication. . In the channel list shown in FIG. 3A, the channel numbers of the xx digital broadcast and the xx digital television overlap. The xx digital broadcast is assigned a branch number 0, and the XX digital television is assigned a branch number 1.
[0025]
The user performs an input operation using the remote control transmitter 10 in order to view the channel list. For example, a "menu" key of the remote control transmitter 10 is pressed. In response to the key operation, the CPU 13 outputs a memory control signal, and extracts the channel table from the memory 14 as memory data. Then, the OSD display circuit 12 creates an OSD video signal for displaying a channel list according to the channel table. The created OSD video signal is superimposed on the received video output from the video processing circuit 5 and output via the video output circuit 7. As a result, as shown in FIG. 3A, an on-screen display of the channel list is performed on the screen.
[0026]
When the user selects a channel by inputting a channel number, the remote controller 10 is operated to perform necessary input processing. More specifically, the user presses the “numeric input” and “1” to “0” keys of the remote control transmitter 10. First, when the "numeric input" key is pressed, the CPU 13 displays a three-digit input frame as shown in FIG. Subsequently, when the numeric keys of “1” to “0” are pressed, the CPU 13 displays the digits one by one, and upon completion of the three-digit input, selects a broadcast corresponding to the input three-digit input. Information is obtained from the above-described channel table, and a tuner control signal is output in accordance with the information to operate the selected channel.
[0027]
Here, if there are a plurality of broadcasts associated with the input channel number in the channel table, it is not clear which one to select as it is, so the CPU 13 determines in FIG. ), A message to that effect is displayed on-screen, and the three-digit input box is changed to an input box for branch number input. The user operates the numeric keypad of the remote control transmitter 10 to input a branch number with reference to the above-mentioned channel list. The CPU 13 receives the remote control signal indicating the branch number, specifies the broadcast, controls the tuner, and selects the designated broadcast. In the channel list illustrated in FIG. 3A, when the 0 key is operated as a branch number, xx digital broadcasting is selected, and when the 1 key is operated, OO digital television is selected. .
[0028]
Further, as shown in FIGS. 5A and 5B, when the three-digit input is completed, a message indicating duplication is displayed together with a list of a plurality of broadcasts associated with the input channel number. It may be. The user looks at this list display and changes the color of the notation portion of the desired broadcast by operating the arrow keys of the remote control transmitter 10 (moving the cursor), and decides with the “Enter” key, or It can be determined by pressing the same numeric key as the branch number displayed on the left end.
[0029]
When the CPU 13 executes the process of selecting one broadcast having the overlapping channel number based on the input of the branch number, the memory 14 stores the fact that the branch number has been selected by the user for the relevant channel number (previous branch number information). Remember. Further, the CPU 13 instructs the timer 21 to measure time (for example, 5 seconds) when displaying a prompt for inputting a branch number (input frame for inputting a branch number, a list, or the like). When the input of the branch number is not detected even when the signal indicating the lapse of time is received from the timer 21, it is determined whether or not the previous branch number information is stored in the memory 14 for the channel number.
[0030]
{Circle around (1)} When the previous branch number information is stored in the memory 14, the CPU 13 reads the channel selection information from the channel table based on the previous branch number information read from the memory 14, and controls the tuner 2 based on the channel selection information to broadcast. Is received. In such a case, once the branch number is input, the broadcast of the previous branch number will be automatically received without any input to the subsequent branch number input request, and the user's operation The labor is reduced.
[0031]
(2) When the previous branch number information is not stored in the memory 14 In such a case, if it is programmed to select the branch number with the smallest number, a process of selecting the branch number with the smallest number is performed. The channel selection process is performed based on the branch number thus set. The branch number having the smallest number is not limited to the reference number. For example, a process of receiving a broadcast with a number “0” (based on the number “0”) may be performed. It may be. For example, a “reference branch number setting menu” is provided on the menu screen, and the number and setting input on the menu screen are stored in the memory 14 to determine the reference number. It may be used, or if there is no such setting, a default value may be used. Even in such a configuration, the broadcast of the predetermined branch number is automatically received, so that the operation trouble of the user is reduced. Further, in addition to performing such automatic channel selection, processing for continuing the display for prompting the entry of the branch number shown in FIG. 4 or FIG. 5 or slightly changing the display mode (for example, blinking the message portion to blink Or change the color). The branch number input by the user in the continuous display is used as the previous branch number information, and is used for automatic channel selection at the time of the next channel number duplication.
[0032]
An area identification number for specifying the installation location of the broadcast receiving device 30 can be set by a function such as a user setting menu of the receiving device 30. The broadcast receiving device 30 has a function of selecting a broadcast assigned to the remote control transmitter 10 by pressing only one key (so-called one-touch key selecting function). Further, a remote control key ID indicating which one-touch key of the remote control transmitter 10 should be assigned to each broadcast is determined for each region, and the receiving device 30 stores a correspondence between the broadcast and the remote control key ID in each region of the whole country in a database. Is stored in the memory 14. When performing the above-described scan, the receiving device 30 extracts the broadcast region identifier and the broadcast station identification from the broadcast information, and if the region identifier matches the region identification number set in the receiving device 30, The remote control key ID is referenced from the database, and the corresponding one-touch key is assigned for the broadcast reception. If a broadcast whose regional ID number and regional identifier do not match is received, a vacant remote control key ID (one-touch key) is automatically assigned to the broadcast. FIG. 3B shows an example of a list of one-touch keys assigned in this manner. Here, the remote control key IDs of the XX digital broadcast and the XX digital television originally overlapped. However, since the XX digital television is a broadcast outside the area, the vacant remote control key ID (5) is used. The one-touch keys 5 have been assigned and assigned. As for the channel number in the XX digital, since the empty remote controller key ID (5) is associated with another channel number which is not duplicated with another channel number by calculation based on the remote controller key ID. (005) is assigned. As a result, if the user wants to select the XX digital TV by inputting the channel number, the user only has to input 005. Will not be.
[0033]
【The invention's effect】
As described above, according to the present invention, it is possible to receive a broadcast outside a region and receive a desired broadcast without any problem even when a channel number is duplicated in a plurality of broadcasts. Play.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a digital broadcast receiving apparatus according to an embodiment of the present invention.
FIG. 2 is a plan view showing a remote control transmitter.
FIG. 3A is an explanatory diagram of a channel list display screen, and FIG. 3B is an explanatory diagram of a one-touch key list screen.
FIG. 4A is an explanatory view showing a screen on which a three-digit input frame for inputting a channel number is displayed, and FIG. 4B is an explanatory view of a screen for prompting the input of a branch number; It is.
FIG. 5A is an explanatory diagram showing a screen on which a three-digit input frame for inputting a channel number is displayed, and FIG. 5B is an explanatory diagram of a screen for prompting selection of a broadcast; is there.
[Explanation of symbols]
1 antenna 2 tuner 3 demultiplexer (DEMUX)
4 AV decoder 12 OSD circuit 13 CPU
14 memory

Claims (3)

Means for scanning a broadcast transmitted from a digital terrestrial broadcasting station; means for associating the broadcast with a channel number based on information multiplexed on the broadcast detected by the scan; and a channel number input by a user. Means for selecting a broadcast corresponding to, a digital broadcast receiving device comprising:
Means for distinguishing the overlapping broadcasts by assigning different branch numbers to the channel numbers when the channel numbers are duplicated in a plurality of broadcasts; and selecting a broadcast corresponding to the branch number input by a user operation. Station, a memory for storing the branch number when the tuning is performed, a time measuring means for measuring time after the overlapping channel number is input, and a predetermined time by the time measuring means. Control means for selecting the broadcast of the branch number stored in the storage means when the input of the branch number is not detected even if the progress of the digital broadcast is measured. apparatus. 2. The digital broadcast receiving apparatus according to claim 1, wherein the input of the branch number is not detected even when the predetermined time has elapsed by the time measuring means, and the branch number is not stored in the storage means. A means for performing a display prompting the user to input a branch number. 2. The digital broadcast receiving apparatus according to claim 1, wherein the input of the branch number is not detected even when the predetermined time has elapsed by the time measuring means, and the branch number is not stored in the storage means. A digital broadcast receiving apparatus configured to select a broadcast having a predetermined reference branch number.

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