JP2002335458A - Digital television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital television receiver that can efficiently and accurately select a channel with the best reception state from a channel list. SOLUTION: The digital television receiver sequentially receives a plurality of broadcast waves, demodulates a transport stream from each broadcast wave, and measures the reception strength of each transport stream. In storing each channel information in each transport stream to a memory, the information is stored by linking the reception strength of each channel measured in the unit of the transport streams to each channel information. When each channel information is read from the memory and the channel list is displayed on a screen of a display device, each channel display part is displayed in different forms, e.g. in different colors depending on the reception strength of each channel stored in the memory in linking with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a digital television receiver.

[0002]

2. Description of the Related Art There are various methods for selecting a channel in a digital television receiver having a large number of channels. One of the methods is to select a desired channel on a screen of a channel list based on an electronic program guide (EPG). That is being done. FIG. 4 shows a state in which a conventional channel list (channel list) is displayed on the screen of the display device.
To channel 12 are displayed. A desired channel is selected by selecting a desired channel from the channels with a remote controller or the like, and a program of the channel is displayed on a screen of the display device.

[0003]

Conventionally, however, the user cannot confirm the reception status of the channel selected before the program of the channel selected as described above is actually displayed. Therefore, after displaying the program, the user may have to return to the channel list again and select another channel because the reception state of the program is poor, and it may take time to select a channel. In addition, the user sometimes mistakenly thinks that the receiver is out of order by selecting a channel having a poor reception condition.

[0004] The present invention has been made in view of the above points,
It is an object of the present invention to provide a digital television receiver that can accurately and efficiently select a channel having a good reception state from a channel list.

[0005]

A digital television receiver according to the present invention sequentially receives a plurality of broadcast waves, demodulates a transport stream from each broadcast wave, and measures the reception intensity of each transport stream. Means for storing each channel information in each transport stream in a memory, linking and storing the reception intensity of each channel measured in units of transport streams with each channel information, and storing each channel information from the memory Means for reading out information and displaying a channel list on the screen of the display device, displaying each channel display section in a different form according to the reception intensity of each channel stored in the memory by linking. Features.

In a preferred embodiment, each channel display section is displayed in a different color according to the reception intensity of each channel. Further, each channel display section is arranged and displayed in order of reception intensity. The reception strength of the transport stream is measured from the bit error rate of the transport stream. Furthermore, the reception strength of the currently receiving channel is measured, and when it is determined that the reception status of the currently receiving channel has become worse, the reception strength of the reception strength stored in the memory is improved. A means for displaying a list of channels only is provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a digital television receiver according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 2 is a block diagram showing a digital television receiver according to an embodiment of the present invention. In this digital television receiver, a broadcast wave is transmitted through a tuner 12 via an antenna 11.
Supplied to The tuner 12 selects a broadcast wave desired by the user and supplies a signal to the demodulation unit 13. Demodulation unit 1
3 demodulates the received signal to obtain a transport stream (hereinafter referred to as TS). TS is demultiplexer 1
4 is supplied.

The demultiplexer 14 separates additional information such as video data, audio data and channel information from the TS, and supplies the video data to the video decoder 15, the audio data to the audio decoder 16, and the additional information to the main controller 17. I do. Audio decoder 16
Supplies the audio data to the audio output device 18 after MPEG demodulation of the audio data. The video decoder 15 converts the video data into MPE
G demodulation is supplied to the mixing unit 19.

A control signal is supplied to the main controller 17 from an input device 20 such as a remote control transceiver. The main controller 17 controls the entire digital television receiver, and one of the controls is as follows.
Additional information such as channel information supplied from the demultiplexer 14 is stored in the memory 21. Further, the main controller 17 sends information for tuning to the tuner 12 and the demultiplexer 14.

Further, the main controller 17 receives the TS output from the demodulator 13, measures the reception strength of each channel in units of TS, and stores the additional information (channel information) in the memory 21 when storing the additional information (channel information) in the memory 21. Is linked to each channel information and stored in the memory 21.

Further, the main controller 17 sends an OSD control signal to the OSD control section 22 for displaying on-screen a channel list screen and various setting screens. The OSD control unit 22 receives the OSD control signal and information from the memory 21 and generates display data for on-screen display of various screens such as a channel list. This display data is supplied to the mixing unit 19. The mixing unit 19 supplies the video data from the video decoder 15 to the display device 23, and superimposes the display data from the OSD control unit 22 on the video data and sends it to the display device 23.

In the digital television receiver as described above, the user operates the auto-install button of the input device (remote controller) 20 to start the auto-install operation. When this operation is started, a plurality of broadcast waves (all broadcast waves) are sequentially received by the tuner 12, as shown in steps S1 and S2 of the flowchart of FIG.
The TS is demodulated from the received broadcast waves by the demodulation unit 13, and the received intensity of each demodulated TS is measured by the main controller 17 from the bit error rate (BER) of each TS.

A plurality of channel information is separated from each demodulated TS by the demultiplexer 14, and the channel information is stored in the memory 21. At this time, in the digital television receiver of the present embodiment, the reception intensity of each channel measured in units of TS as described above is stored in the memory 21 in a manner linked to each channel information (step S3 in FIG. 3). ).

When the above-described auto-installation operation is completed for all broadcast waves (all TSs) (FIG. 3)
Step S4), the channel information stored in the memory 21 is read and a channel list is displayed on the screen of the display device 23 (Step S5 in FIG. 3). FIG. 1 shows an example of the displayed channel list (channel list), in which channels 1 to 12 are displayed as selectable channels.

When the channel list is displayed in this manner, in the digital television receiver of the present embodiment, the reception intensity of each channel is stored in the memory 21 by linking to each channel information as described above. The reception intensity is read out, and the display mode of each channel display unit, here, the color of each channel display unit is changed and displayed according to the reception intensity of each channel. In FIG. 1, the reception intensity is divided into three stages, and each channel display section is displayed in three colors according to the reception intensity. For example, the display unit 31 displayed in black, such as channel 1, is displayed in red, for example, and corresponds to “reception intensity = good”. Further, the display portion 32 displayed in whitish such as the channel 5 is displayed in yellow, for example, and corresponds to "reception intensity = bad". Further, the display section 33 such as the channel 9 which is displayed in an intermediate color between white and black is displayed in, for example, orange, and “reception intensity = somewhat good”.
It corresponds to.

Therefore, according to the channel list display as described above, the reception intensity of each channel can be accurately known from the color of each channel display section, so that a channel having a good reception state can be accurately and efficiently detected. You can choose. Further, even if a channel having a poor reception state is selected, the reception strength is known, so that it is not misunderstood that the receiver is out of order. In particular, since such a channel list display can grasp the reception strength of each channel, the receiver is an in-vehicle mobile TV receiver, and it is necessary to move to an area where the reception strength of each channel is unknown. This is very convenient for receiving broadcasts. further,
The display of the reception strength also has an effect of urging the user to perform auto-installation again at the destination and obtain a new channel list.

In the above-mentioned channel list display, if the channel display section is arranged and displayed in the order of the reception intensity, the selection of the channel having a good reception state becomes more efficient.

Further, the reception intensity of the currently receiving channel is measured, and when it is determined that the reception condition of the currently receiving channel is getting worse, the reception intensity based on the reception intensity stored in the memory 21 is determined. If a list of only the channels having excellent strength is displayed to prompt the user to select a channel again, the reception strength information in the memory 21 can be more effectively used, and the channel selection becomes more convenient.

Further, in the above embodiment, the color of the channel display section is changed in accordance with the reception intensity. However, other display forms such as the pattern and the character type of the displayed channel name may be changed. You may make it change according to reception intensity. Further, as a channel name displayed on the channel display section, a program name or the like can be displayed in addition to a channel number such as "Channel 1", "Channel 2", and so on.

[0020]

As described in detail above, according to the digital television receiver of the present invention, it is possible to accurately and efficiently select a channel having a good reception state from a channel list.

[Brief description of the drawings]

FIG. 1 is a diagram showing a channel list display screen according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an embodiment of a digital television receiver according to the present invention.

FIG. 3 is a flowchart showing the operation of the embodiment of the present invention.

FIG. 4 is a diagram showing a conventional channel list display screen.

[Explanation of symbols]

 Reference Signs List 12 Tuner 13 Demodulation unit 14 Demultiplexer 17 Main controller 20 Input device 21 Memory 22 OSD control unit 23 Display device 31-33 Channel display unit

Claims (5)

[Claims] 1. A means for sequentially receiving a plurality of broadcast waves, demodulating a transport stream from each broadcast wave, and measuring a reception intensity of each transport stream, and storing each channel information in each transport stream in a memory. Means for storing the reception intensity of each channel measured in transport stream units in a manner linked to the respective channel information, and reading each channel information from the memory to display a channel list on a screen of a display device. Means for displaying each channel display section in a different form according to the reception strength of each channel stored in the memory by linking when displaying the digital television receiver. 2. The digital television receiver according to claim 1, wherein each channel display section is displayed in a different color according to the reception intensity of each channel. 3. The digital television receiver according to claim 1, wherein each of the channel display sections is arranged and displayed in order of the reception intensity. 4. The digital television receiver according to claim 1, wherein the reception strength of the transport stream is measured from a bit error rate of the transport stream. 5. The reception strength of a currently receiving channel is measured, and when it is determined that the reception status of the currently receiving channel is getting worse, the reception strength is stored based on the reception strength stored in the memory. 2. The digital television receiver according to claim 1, further comprising means for displaying a list of only the channels excellent in the number.