JP2001244832A - Digital broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcast receiver for receiving a ground wave digital broadcast, which can perform reception from the same broadcasting station or a broadcasting station of the same group with the same selection button even when the receiver moves to another area. SOLUTION: A storage 14 stores records in which broadcasting station names, channel selection information, and channel selection buttons are made to correspond to one another. A system controller 13 makes a tuner 2 operate to detect broadcasting waves having different frequencies in order. Further, the system controller 13 obtains the broadcasting station name of a received broadcasting wave separated by a TS separation part 3 and the channel selection information and supplies them to a broadcasting station name comparing update part 16. The broadcasting station name comparing update part 16 compares the broadcasting station name obtained from the broadcasting wave with the broadcasting station names stored in the storage part 14 and updates the contents of the storage part 14 according to the comparison result so that the broadcasting station can be viewed with the same selection button.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast receiving apparatus for receiving a digital broadcast.

[0002]

2. Description of the Related Art Image compression using digital signal compression technology
There is satellite digital broadcasting that compresses an audio signal and broadcasts a stream (transport stream) obtained by time-division multiplexing video and audio digital signals of a plurality of programs via a transponder (satellite repeater). And
Also in terrestrial broadcasting, it has been considered to perform digital broadcasting for one channel of HDTV or three channels for ordinary television in a conventional frequency bandwidth (6 MHz) using the UHF band.

On the other hand, a broadcast receiving apparatus for receiving a terrestrial digital broadcast selects a broadcast wave received through a conventional UHF antenna with a tuner, separates an arbitrary transport stream from the selected broadcast wave, and separates the selected transport stream. A video / audio signal is output by decoding the transport stream thus obtained. In addition, similar to satellite digital broadcasting, additional information other than video and audio is transmitted, and an EPG (Electronic Pr.
It is considered that a program to be watched from among multiple channels can be easily selected by the "program guide" function. The additional information may include a program name, a program start time, a program end time, a broadcast station name, information for selecting a broadcast station, and the like.

By the way, in a television receiver for receiving terrestrial broadcasting, receivable broadcast stations are different depending on an area where the receiver is installed. Therefore, at the time of purchase, a user assigns a broadcast station to a channel selection button on a remote controller. You are performing an operation. In addition, the user may perform an operation of assigning a favorite broadcasting station to an arbitrary tuning button. In such a channel setting, the content operated by the user on the operation guide screen using the OSD (On Screen Display) function is reflected, for example, that the channel selection button is selected and the reception channel is UHF.
The receiver recognizes that 30 channels have been selected. The frequency information for each channel number is stored in the memory as a specified value.

[0005]

However, when a receiver installed in a certain area is moved to a different area where a receivable broadcast station is moved to, a remote controller selects a channel of the receivable broadcast station there. The operation of reassigning the station button is performed.

In view of the above circumstances, the present invention makes it possible to view the broadcast station assigned by the user to the channel selection button or the broadcast station affiliated with the broadcast station to the same channel selection button as much as possible in the destination area. It is an object of the present invention to provide a digital broadcast receiving apparatus that performs a re-channel scan so that it can perform a re-channel scan.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a digital broadcast receiving apparatus according to the present invention provides a digital broadcast receiving apparatus which receives terrestrial digital broadcasts in which receivable broadcast stations differ according to regions. Storage means for storing station names, tuning information, and tuning buttons in association with each other; channel scanning means for sequentially detecting broadcast waves having different frequencies; at least broadcast station names and tuning information from the detected broadcast waves And an comparing means for comparing the information obtained from the broadcast wave with the information stored in the storage means, so that the same broadcasting station can be viewed with the same tuning button based on the comparison result. Updating means for updating the contents of the storage means.

With the above configuration, the same broadcast station can be received with the same channel selection button even when the receiver is moved to another area. For example, it is assumed that a setting is made so that the XX television is received at the frequency aaa MHz using the channel selection button before the movement. This information is stored in the storage means. In the channel scan after the movement, when the broadcast station name obtains information that the channel selection information is xxx MHz on the XX television, the comparison means gives a comparison result indicating that the reception frequency is different at xxx MHz when the broadcast station name matches. can get. The updating unit updates the contents of the storage unit based on the comparison result so that the XX television is received at the frequency xxx MHz at the channel selection button.

[0009] In the above configuration, there is provided an affiliated broadcast station table storing the names of affiliated broadcast stations, and the comparing means stores the broadcast station names acquired from broadcast waves stored in the storage means. When the broadcast station name does not match, refer to the affiliated broadcast station table, and in the affiliated broadcast station table, when there is a broadcast station name having an affiliated relationship with the broadcast station name obtained from the broadcast wave, a comparison result indicating the existence thereof is obtained. Preferably, the updating means is configured to update the contents of the storage means based on the comparison result so that the same broadcasting station can be viewed with the same tuning button.

For example, before moving, the channel selection button
○ It is assumed that the television is set to be received at the frequency aaa MHz. In the channel scan after moving,
Assuming that the information that the broadcasting station name is BB television and the channel selection information is xxx MHz is obtained and the comparing means checks the storage means and there is no matching broadcasting station name, it refers to the affiliated broadcasting station table. Become. If it is determined by referring to the affiliated broadcasting station table that the XX television and the BB television have an affiliated relationship, a comparison result indicating this is output. The updating means updates the contents of the storage means based on the result of the comparison so that the BB television is received at the frequency xxx MHz at the tuning button.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A digital broadcast receiving apparatus according to an embodiment of the present invention will be described below with reference to FIGS. This digital broadcast receiving apparatus receives a terrestrial digital broadcast.

In the digital broadcast receiving apparatus shown in FIG. 1, an antenna 1 receives a terrestrial digital broadcast signal,
This received signal is provided to the tuner 2. The tuner 2 extracts a signal of a designated frequency from a high-frequency digital modulation signal including video / audio data. Further, the tuner 2 includes a demodulation circuit, a deinterleave circuit, an error correction circuit, and the like, and thereby demodulates the selected digital modulation signal and outputs a transport stream.

The TS separation unit 3 converts the transport stream received from the tuner 2 into an MPEG2 (Mov)
ing Picture Experts Group
2) Video transport packet, audio transport packet, and PSI (Program S)
specific information). The demultiplexer 3 supplies a video transport packet and an audio transport packet to the AV decoder 4, and supplies additional information (EPG information, broadcast station name, and the like) included in the PSI to the system controller 13. The system controller 13 stores the EPG information in the EPG memory 17. When a transport stream in which a plurality of programs are multiplexed is input, the TS separation unit 3 extracts a transport stream corresponding to the specified program.

The AV decoder 4 includes a video decoder for decoding video transport packets and an audio decoder for decoding audio transport packets. The video decoder is
The input variable length code is decoded to obtain a quantization coefficient and a motion vector, and inverse DCT transform and motion compensation control based on the motion vector are performed. The audio decoder generates audio data by decoding the input coded signal. 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.

A video processing circuit 5 receives video data from the AV decoder 4 and performs D / A conversion to generate a video signal. The audio signal processing circuit 6 receives the audio data output from the AV decoder 4, performs D / A conversion, and generates a right (R) sound analog signal and a left (L) sound analog signal. The generated video signal is supplied to a picture tube section 7, and the audio signal is supplied to a speaker 8.

An OSD (On Screen Display) display circuit 12 adds bitmap data based on character information output from a system controller 13 to an adder 9.
Output to The adder 9 performs a process of incorporating the bitmap data into a video signal output from the video processing circuit 5. The OSD display circuit 12 allows the EPG storage unit 17
EPG (Elect) based on the additional information read from
(Ronic Program Guide) screen display can be realized, and also an operation guide screen can be displayed.

The remote control transmitter 10 is a transmitter for sending a command to the broadcast receiving device 30. When a key (not shown) provided on the remote control transmitter 10 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 11 receives the signal light, converts the light into an electric signal, and supplies the electric signal to the system controller 13.

The non-volatile writable storage unit 14 stores a broadcast station name and tuning information (for example, channel frequency and channel number) obtained from the additional information. FIG. 2 is an explanatory diagram showing the information storage contents of the storage unit 14. When a tuning button on the remote control is assigned to a broadcasting station, the button number is stored in association with the broadcasting station name. When the button number is changed by the channel setting by the user, the button number after the change is stored.

The affiliated broadcast station table 15 stores a list of broadcast station names having an affiliated relationship. FIG. 3 is an explanatory diagram showing the information storage contents of the affiliated broadcast station table 15. Each list is assigned an ID so that it can be distinguished from other lists.

The broadcast station name comparison processing section 16 acquires the broadcast station name from the additional information of the currently received broadcast, and acquires the acquired broadcast station name and the information (broadcast station name,
Channel frequency, button number) and storage unit 1
4 to control the updating of the stored contents and control for referring to the affiliated broadcasting station table 15 at the time of updating.

The system controller 13 performs a channel selection process, a channel scan process, and the like by a user using the remote control transmitter 10 and the like. When a channel selection button of the remote control transmitter 10 is pressed in channel selection, the storage unit 1 indicates which broadcasting station the channel selection button indicates.
Judgment is made based on the stored contents of No. 4 and the channel is changed using the corresponding tuning information. When a channel is changed by an operation on the EPG screen, the system controller 13
Will acquire channel selection information from the currently received additional information and change the channel. When a channel selection operation is required in the tuner 2 due to the channel change, that is, when the target channel is not multiplexed in the currently demodulated transport stream,
The tuner 2 performs a channel selection operation according to a command from the system controller 13, and the TS separation unit 3 extracts a stream corresponding to a target channel.

Further, the system controller 13 controls the tuner 2 in the channel scanning process at the time of purchase of the receiving apparatus, thereby sequentially detecting broadcast waves having different frequencies in a frequency band that can be received, and If there is a wave, a process of causing the TS separation unit 3 to acquire the broadcast station name and tuning information from the detected broadcast wave and storing the acquired broadcast station name and tuning information in the storage unit 14 is performed. In addition, in the operation of assigning the tuning button of the remote control transmitter 10, a process of storing the number of the tuning button specified by the user for a certain broadcasting station in the storage unit 14 as shown in FIG. 2 is performed. .

FIG. 4 schematically shows a flow from the first channel scan processing after purchasing the digital broadcast receiving apparatus to the re-channel scanning processing after moving the receiving apparatus. First, at the beginning of the purchase of the receiving device, the user instructs the receiving device to perform channel scanning using the remote control transmitter 10 or the like, and causes the receiving device to perform a channel selection operation in a frequency band where reception is possible at the installation location. . When it can be determined that there is a broadcast wave, the receiving device stores the name of the broadcast station separated by the TS separation unit 3 and tuning information for receiving the broadcast wave as one record in the storage unit 14. It goes (step S11). Next, as the user assigns a favorite tuning button to each broadcasting station, the number information of the tuning button is stored in each record (step S12). By the above processing,
The user can watch the program of the broadcasting station assigned by the user simply by pressing the channel selection button of the remote control transmitter 10.

Thereafter, it is assumed that the receiving device has moved to another broadcast area due to transfer or the like (step S13). At this time, there is a possibility that the channel cannot be selected in the area after the movement by the channel selection information by the channel scan before the movement. Therefore, in the re-channel scan in step S14, in order to allow the user to view the broadcast station assigned to the channel selection button or the affiliated broadcast station of the broadcast station with the same channel selection button as much as possible in the destination area. Is performed. Details of this processing will be described based on the flowchart of FIG.

In FIG. 5, first, it is determined whether or not a broadcast wave is detected at a certain channel frequency by the channel scanning process (step S1). If a broadcast wave is detected, the broadcast station name and tuning information of the broadcast wave (reception channel) are separated by the TS separation unit 3 and provided to the system controller 13 (step S2).
The broadcast station name comparing / updating unit 16 compares the obtained broadcast station name with the broadcast station name stored in the storage unit 14 (step S3), and determines whether a matching broadcast station name exists (step S3). Step S4).

If there is a matching broadcast station name, the tuning information is updated (step S7). For example, as shown in FIG. 2, it is assumed that the storage unit 14 has a record indicating that the XX television is received at the frequency aaa MHz at the channel selection button. In the channel scan after the movement, if the information that the broadcast station name is xxx MHz and the channel selection information is xxx MHz is obtained, a comparison result is obtained that the reception frequency differs at xxx MHz when the broadcast station name matches. Based on the above comparison result, the broadcast station name comparing / updating unit 16 changes the XX television to the frequency xxx with the tuning button.
Update the contents of the record to receive in MHz.

If there is no matching broadcast station name,
The broadcast station name comparison / update section 16 refers to the affiliated broadcast station table 15 (step S5). Then, it is determined whether or not a broadcast station name having a series relationship with the broadcast station name acquired from the broadcast wave exists in the affiliated broadcast station table 15 (step S6). If there is a broadcast station name having a series relationship, the channel selection information and the broadcast station name are updated (step S8). A series of processes in the case where this table reference is performed will be exemplified below. For example, as shown in FIG.
It is assumed that a record indicating reception at a MHz exists. Assuming that in the channel scan after the movement, information that the broadcast station name is BB TV and the channel selection information is xxx MHz is obtained, since there is no record related to the BB TV in the storage unit 14, refer to the affiliated broadcast station table 15. Will do. For example, it is assumed that the affiliated broadcasting station table 15 indicates that the XX television and the BB television have an affiliated relationship as shown in FIG. At this time, YES is determined in step S6, and step S6 is performed.
8, the BB television is switched to the frequency xx by the tuning button.
The content of the record will be updated to receive at x MHz.

In determining the series relationship, first, the list ID of the record to which the BB television belongs is obtained. Then, a search is performed to determine whether or not a broadcast station name other than BB television in the record of the list ID is stored in the storage unit 14. In the example of FIG. 3, the broadcast station name of XX TV is stored in the list ID of the record to which the BB TV belongs.
Since the XX television is stored in the storage unit 14 (see FIG. 2), it is understood from this that the BB television is a series of the XX television.

If it is determined in step S6 that the acquired broadcast station name does not exist in the affiliated broadcast station table, after the update processing in steps S7 and S8, and if no broadcast wave has been detected in step S1, all channels It is determined whether or not scanning has been performed on the frequency (step S9). If all the channels have been scanned, the process ends. If there are channels to be scanned, the next channel frequency is set. move on.

The broadcast station name is not limited to "と い っ た TV", but includes an abbreviation symbol (call sign) of the broadcast station such as "○ TV".

[0031]

As described above, according to the present invention, the broadcast button assigned by the user to the broadcast button or the broadcast station affiliated with the broadcast station can be watched as much as possible in the destination area. Since the re-channel scan is executed so that the user can perform the re-channel scan, there is an effect that the user can save the trouble of re-channel setting.

[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 an explanatory diagram showing contents stored in a storage unit of the embodiment.

FIG. 3 is an explanatory diagram showing the contents stored in an affiliated broadcast station table according to the embodiment;

FIG. 4 is an explanatory diagram simply showing a flow from a first channel scan after purchase of a digital broadcast receiving apparatus to a re-channel scan after moving.

FIG. 5 is a flowchart showing specific processing contents performed in the re-channel scan of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antenna 2 Tuner 3 TS separation part 4 AV decoder 10 Remote control transmitter 13 System controller 14 Storage part 15 Broadcasting station name comparison updating part 16 Sequence broadcasting station table

Claims (2)

[Claims] 1. A digital broadcast receiving apparatus for receiving terrestrial digital broadcasts in which broadcast stations receivable by region differ from each other, wherein a storage means for storing a broadcast station name, channel selection information, and a channel selection button in association with each other; Channel scan means for sequentially detecting different broadcast waves, information acquisition means for acquiring at least a broadcast station name and channel selection information from the detected broadcast waves, and information acquired from the broadcast waves stored in the storage means. Digital broadcast reception characterized by comprising: comparison means for comparing with information; and updating means for updating the contents of the storage means so that the same broadcast station can be viewed with the same channel selection button based on the comparison result. apparatus. 2. The digital broadcast receiving apparatus according to claim 1, further comprising a series broadcast station table storing broadcast station names having a series relationship, wherein said comparing means stores the broadcast station name obtained from a broadcast wave. When the broadcast station name does not match the broadcast station name stored in the broadcast station name, the broadcast station name is referred to, and a broadcast station name having a stream relationship with the broadcast station name obtained from the broadcast wave exists in the broadcast station table. And outputs the comparison result indicating the existence of the broadcast station, and the updating means is configured to update the contents of the storage means based on the comparison result so that viewing of the same series of broadcasting stations can be performed with the same tuning button. A digital broadcast receiving device characterized by the above-mentioned.