JP3939202B2 - Digital broadcast receiver - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a digital broadcast receiving apparatus that receives terrestrial digital broadcasts.
[0002]
[Prior art]
A digital broadcast receiving apparatus that receives a digital broadcast using a terrestrial wave selects an arbitrary broadcast wave from a plurality of broadcast waves received through a terrestrial antenna using a digital tuner, and includes a plurality of broadcast waves included in the selected broadcast wave. An arbitrary channel is selected from among these channels by demultiplexing processing, a digital signal of the selected channel is taken out, and a video / audio signal is output by decoding it.
[0003]
By the way, terrestrial digital broadcasting is scheduled to start on channels in the UHF (Ultra High Frequency) band from 2003 in Japan. In terrestrial digital broadcasting, only a single radio wave is transmitted from the main station. Therefore, a relay station is installed, and the MFN (Multi Frequency Network) system in which the main station and the relay station broadcast the same broadcast at different frequencies is planned to be adopted. In the main station of digital broadcasting, as described above, a channel is assigned to UHF. For example, in view of the fact that eight channels are generally recognized as a broadcasting station, remote control transmission is performed. It is conceivable to devise so that the broadcast station can be received by pressing the button 8 of the machine. Specifically, the receiving device acquires the TS number descriptor (remote control key ID) in the NIT (Network Information Table) of PSI (Program Specific Information) in the stationed broadcast wave found by the channel search. Information for receiving the broadcast station is made to correspond to the number indicated by the remote control key ID (the numeric key of the remote control). That is, when the broadcasting station adds and transmits “8” as the remote control key ID to the TS number descriptor, the receiving device receives this information and obtains the remote control key ID. Set XX broadcasting station to key 8. Thereafter, when the user presses the key 8 of the remote control transmitter, the channel of the OO broadcast station is selected.
[0004]
[Problems to be solved by the invention]
However, under the MFN system, a certain remote control key ID in a certain area may be assigned to a plurality of broadcast stations. For this reason, in the receiving apparatus, one setting is left out of a plurality of broadcasting stations having the same remote control key ID, and information for receiving other broadcasting stations is deleted from the memory. As a result of this deletion processing, it may become impossible to select a broadcast station other than the remaining ones.
[0005]
In view of the circumstances described above, the present invention allows one of the overlapping broadcast stations to be normally selected while the remote control key ID is assigned to a plurality of broadcast stations. It is an object of the present invention to provide a digital broadcast receiving apparatus that can select a channel automatically.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the digital broadcast receiving apparatus of the present invention detects a channel by channel search and stores the information in a memory, and information included in the digital broadcast wave of the channel If it is detected that the same remote control key ID is assigned to a plurality of broadcast stations, information acquisition means for acquiring the remote control key ID from among the broadcast stations is selected corresponding to the remote control key ID. A channel selection setting unit for performing a setting to be set, a unit for displaying that another broadcast station exists on the screen in a state where the one broadcast station is selected and received, and the other broadcast station is selected. And means for selecting another broadcast station based on information in the memory when an operation to be performed is performed by a user.
[0007]
With the above configuration, even when the remote control key ID is assigned to a plurality of broadcast stations in an overlapping manner, one of the overlapping broadcast stations is normally selected and the other broadcast stations are in the other broadcasts. When an operation for selecting a station is performed by the user, the other broadcasting station is selected based on the information in the memory.
[0008]
When an operation for selecting the other broadcast station is performed by the user, the other broadcast station may be set to be selected in accordance with the remote control key ID.
[0009]
The information acquisition means acquires broadcast station name information in addition to the remote control key ID, and the channel selection setting means displays the broadcast station name information of a plurality of broadcast stations having the same remote control key ID on the screen, One broadcast station selected by the user from this display may be configured to be set to be selected corresponding to the remote control key ID.
[0010]
The channel selection setting means prioritizes a broadcasting station in the prefecture where the receiving apparatus is installed among a plurality of broadcasting stations having the same remote control key ID, and performs setting corresponding to the remote control key ID. It may be configured.
[0011]
The channel selection setting unit is configured to perform a setting to select a channel corresponding to the remote control key ID for one broadcast station having the best reception state among a plurality of broadcast stations having the same remote control key ID. It may be configured.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a block diagram showing a digital broadcast receiver 30 of this embodiment for receiving terrestrial digital broadcasts, and FIG. 2 is an explanatory diagram illustrating a broadcast station selection screen when remote control key IDs overlap.
[0013]
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 gives the received signal to the terrestrial digital tuner 2.
[0014]
The terrestrial digital tuner 2 extracts a signal having a specific frequency from the high-frequency digital modulation signal including video / audio data. The terrestrial digital tuner 2 includes a demodulation circuit, a deinterleave circuit, an error correction circuit, etc., and demodulates the selected digital modulation signal to output a transport stream.
[0015]
The demultiplexer (DEMUX) 3 separates the transport stream into a moving picture experts group 2 (MPEG2) video stream, an audio stream, and a program specific information / service information (PSI / SI). The demultiplexer 3 supplies the video stream and the audio stream to the AV decoder 4 and supplies program information included in the PSI / SI to the CPU 13. Note that a plurality of channels are multiplexed in the transport stream, and the process for selecting an arbitrary channel from among these is the packet ID of the arbitrary channel in the transport stream from the PSI / SI. It becomes possible by taking out data such as whether or not it is multiplexed. The transport stream can also be selected based on PSI / SI information.
[0016]
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 decodes the input variable length code to obtain a quantization coefficient and a motion vector, and performs inverse DCT conversion, motion compensation control based on the motion vector, and the like. The audio decoder decodes the input encoded 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.
[0017]
The video processing circuit 5 receives video data from the AV decoder 4 and performs D / A conversion, for example, to convert it into 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.
[0018]
The video processing 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 video output terminals, etc.). 16 is connected.
[0019]
The OSD (On Screen Display) circuit 12 outputs video data based on character information and color information instructed to be output from the CPU 13 to the adder 20. The adder 20 performs processing for incorporating the video data into the received video data output from the AV decoder 4. The OSD circuit 12 can display a menu screen and various setting screens.
[0020]
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, 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 it into an electric signal, and gives it to the CPU 13.
[0021]
In addition to data for displaying the EPG screen, station memory channel information (frequency information, remote control key ID, broadcast station name information, etc.) is stored in the nonvolatile memory (for example, flash ROM).
[0022]
The CPU 13 performs overall control in the digital broadcast receiving apparatus 30. In particular, as a process according to the present invention, the CPU 13 executes control when the remote control key IDs overlap. Hereinafter, such control will be described.
[0023]
For example, when the receiving device 30 is turned on for the first time, the user instructs channel search from the menu screen. The CPU 13 selects the lowest frequency in the UHF band at which the terrestrial digital broadcast is transmitted to the terrestrial digital tuner 2 to perform stationed determination. If it is determined to be a station, the remote control key ID is extracted from the TS information descriptor included in the NIT together with the frequency information and station information (broadcast station series name, etc.) and stored in the nonvolatile memory 14. This process is continued up to the highest frequency by sequentially increasing the frequency. As a result, a channel map in which frequency information, station information, and remote control key IDs of selectable channels are associated is created.
[0024]
For example, if the CPU 13 performs a channel search and determines, for example, that 13ch, 15ch, 20ch, and 30ch are stationed, the channel map created by the CPU 13 is as follows, for example.
[0025]
13ch □□□ Broadcasting station Remote control key ID “8”
15ch *** Broadcasting station Remote control key ID “10”
20ch ▲▲▲ Broadcasting station Remote control key ID "10"
30ch xxx broadcast station remote control key ID "6"
[0026]
The CPU 13 determines that the remote control key IDs “6” and “8” are assigned to only one broadcasting station, associates the xxx broadcasting station with the “6” key of the remote control transmitter 10, and sets “8 ”□□□ Broadcast station is associated with the key.
[0027]
On the other hand, the CPU 13 recognizes that the remote control key ID “10” is assigned to both the *** broadcast station and the ▲▲▲ broadcast station. In this case, the OSD circuit 12 is used to display the selection screen. . FIG. 2A shows an example of the selection screen display. In this display example, the broadcast wave of the selected broadcast station is received and displayed, and the broadcast station name (*** broadcast station and ▲▲▲ broadcast station) is shown in the center of the screen. In this display, the user selects either *** broadcast station or ▲▲▲ broadcast station using the up and down keys of the remote control transmitter 10, for example, and confirms the selection with the enter key. As shown in FIG. 2A, when the user selects a *** broadcast station and presses the enter key, the CPU 13 normally selects the *** broadcast station with the “10” key of the remote control transmitter 10. The broadcast station on the side that is not selected by the user is set as a sub broadcast station of the “10” key. Thereby, a channel map is created as follows, for example.
[0028]
13ch □□□ Broadcasting Station “8”
15ch **** Broadcasting station “10” Broadcasting station 20ch normally selected ▲▲▲ Broadcasting station “10” Sub broadcasting station 30ch XXX Broadcasting station “6”
[0029]
As a result, when the “10” key of the remote control transmitter 10 is pressed, as shown in FIG. 2B, the normally selected broadcast station *** broadcast station (15ch) is received. At this time, a channel banner (broadcast station name (broadcast station logo), program name, start time, end time, etc.) is displayed together with the received video. Furthermore, in this embodiment, a display indicating that a sub broadcast station exists (in the figure, a red square frame and a character of ▲▲▲ broadcast station) is also written on the channel banner. The channel banner is displayed for a predetermined period (for example, several seconds) after a numeric key of the remote control transmitter 10 is pressed (that is, a channel is selected), for example. Here, when the user presses the red color button provided on the remote control transmitter 10, the CPU 13 sends a command to the terrestrial digital tuner 2 to select 20 channels of the broadcasting station, and ▲▲▲ Broadcasting The station program is displayed.
[0030]
The state of selecting a sub broadcast station may be set to be canceled when another channel is selected by the user or canceled when the TV is turned off. When an operation for selecting a broadcast station is performed by the user, the sub broadcast station is set to be selected corresponding to the remote control key ID (that is, a normally selected broadcast station), Replacement processing may be performed in which the original normally selected broadcast station is a sub broadcast station.
[0031]
In the above example, a plurality of broadcast stations with overlapping remote control key IDs are displayed and allowed to be selected by the user. However, the present invention is not limited to this, and the reception is performed among a plurality of broadcast stations having the same remote control key ID. The broadcast station in the prefecture where the device is installed may be given priority so as to be set to correspond to the remote control key ID, or it may be received among a plurality of broadcast stations having the same remote control key ID. One broadcast station having the best state (determined by C / N ratio, error rate, etc.) may be set to be selected corresponding to the remote control key ID.
[0032]
【The invention's effect】
As described above, according to the present invention, even when remote control key IDs are assigned to a plurality of broadcast stations, the other broadcast stations can be selected while normally selecting one of the overlapping broadcast stations. Has the effect of being able to select a sub-channel.
[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 illustrating a screen when remote control key information is duplicated.
[Explanation of symbols]
1 Antenna 2 Terrestrial Digital Tuner 3 Demultiplexer (DEMUX)
4 AV decoder 12 OSD circuit 13 CPU
14 Nonvolatile memory

Claims (5)

Means for detecting a channel channel by channel search and storing the information in a memory; information acquisition unit for acquiring a remote key ID from information contained in the digital broadcast wave of the channel channel; and the same remote key When it is detected that an ID is assigned to a plurality of broadcasting stations, channel setting means for setting a channel to be selected corresponding to the remote control key ID for one broadcasting station, and the one broadcasting station The means for displaying that there is another broadcast station on the screen in the channel selection received state, and when the operation for selecting the other broadcast station is performed by the user based on the information in the memory And a means for selecting another broadcasting station. 2. The digital broadcast receiving apparatus according to claim 1, wherein when the user performs an operation of selecting the other broadcast station, the other broadcast station is selected according to the remote control key ID. A digital broadcast receiver characterized in that it is configured to be corrected. 3. The digital broadcast receiver according to claim 1, wherein the information acquisition means acquires broadcast station name information in addition to the remote control key ID, and the channel selection setting means has a plurality of remote control key IDs. The broadcast station name information of the broadcast station is displayed on the screen, and one broadcast station selected by the user from this display is set to be selected corresponding to the remote control key ID. A digital broadcast receiver characterized by the above. 3. The digital broadcast receiver according to claim 1, wherein the channel selection setting means is a broadcast station in a prefecture where the receiver is installed among a plurality of broadcast stations having the same remote control key ID. The digital broadcast receiving apparatus is configured to perform setting corresponding to the remote control key ID with priority given to. 3. The digital broadcast receiving apparatus according to claim 1, wherein the channel selection setting unit is configured to select one broadcast station having the best reception state among a plurality of broadcast stations having the same remote control key ID. A digital broadcast receiving apparatus configured to perform channel setting corresponding to a remote control key ID.

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