JP2007129572A - Television receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a television receiver which automatically switches a program being viewed to the same program if the same program as the viewing program is broadcasted by another broadcasting wave of a different network when a reception state is deteriorated while viewing the television program. <P>SOLUTION: The television receiver comprises: a means for determining whether the same program as the viewing program is broadcasted at present by another broadcasting wave of a network different from the broadcasting wave of the viewing program on the basis of program information when the electric field strength of the viewing program becomes less than a prescribed level; a means for determining whether the electric field strength of the same program is at the prescribed level or above when it is determined that the same program as the viewing program is broadcasted at present by another broadcasting wave of the network different from the broadcasting wave of the viewing program; and a means for automatically switching the viewing program to the same program when it is determined that the electric field strength of the same program is at the prescribed level or above. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a television receiver.

  In BS digital broadcasting, in addition to normal broadcast waves, broadcast waves using a transmission method that is relatively resistant to radio interference may be transmitted simultaneously. Therefore, in the case of receiving a BS digital broadcast, a television receiver automatically switches to a broadcast wave that is resistant to failure if the reception state of the normal broadcast wave deteriorates.

  However, the transmission of the two types of broadcast waves as described above is not performed in all channels. In addition, since broadcast waves that are resistant to obstacles have a small transmission capacity, the resolution of images due to broadcast waves that are resistant to obstacles is generally lower than the resolution of images due to normal broadcast waves.

  For broadcast waves other than BS digital broadcasts, no consideration has been given to how to deal with a bad reception state.

  In the present invention, when a reception state is deteriorated during viewing of a TV program, if the same program as the program being viewed is broadcasted by another broadcast wave with a different network, the program viewed by another broadcast wave with a different network is used. An object of the present invention is to provide a television receiver capable of automatically switching to the same program being broadcast.

  The invention according to claim 1 is a television receiver having a function of receiving a plurality of types of broadcast waves with different networks, and a first means for receiving and holding program information for each broadcast wave with different networks, The second means for monitoring the electric field strength of the program. When the electric field strength of the viewing program falls below a predetermined level, the same program as the viewing program is currently broadcast by another broadcast wave having a different network from the broadcast wave of the viewing program. A third means for determining whether or not the program is held based on the program information held by the first means; the same program as the viewing program is currently being broadcast by another broadcast wave having a different network from the broadcast wave of the viewing program A fourth means for determining whether or not the electric field strength of the same program is equal to or higher than a predetermined level, and the electric field strength of the same program is a predetermined level. If it is determined that the above is characterized in that it comprises a fifth means for automatically switching the viewing program on the same program.

  According to the present invention, when the reception state becomes worse during viewing of a TV program and the same program as the viewing program is being broadcast by another broadcast wave with a different network, the viewing program is broadcasted to another broadcast with a different network. It is possible to automatically switch to the same program being broadcast by waves.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention applied to a television receiver having a function of receiving terrestrial analog broadcasting and digital broadcasting will be described below with reference to the drawings.

  FIG. 1 shows a configuration of a television receiver.

  The analog broadcast wave is sent to the analog broadcast tuner 2 via the analog broadcast antenna 1 and demodulated. The digital broadcast wave is sent to the digital broadcast tuner 4 via the digital broadcast antenna 3 and demodulated.

  The output of the analog broadcast tuner 2 is sent to the analog broadcast AV decoder 6. The analog broadcast AV decoder 6 demodulates the video signal and the video signal sent from the analog broadcast tuner 2 and extracts attached information such as program information. The video signal obtained by the analog broadcast AV decoder 6 is sent to the video processing circuit 8 via the selector 21. The audio signal obtained by the analog broadcast AV decoder 6 is sent to the audio processing circuit 12 via the selector 22. The attached information extracted by the analog broadcast AV decoder 6 is sent to the system controller 17. Such ancillary information is superimposed on the radio wave by, for example, ADAMS (TV-Asahi Data and Multimedia Service).

  The output of the digital broadcast tuner 4 is sent to the DEMUX circuit 5 where the packet is decoded. In the DEMUX circuit 5, the packet is classified into video information, audio information, and auxiliary information such as program information. Video information and audio information sorted by the DEMUX circuit 5 are sent to the AV decoder 7 for digital broadcasting. The attached information separated by the DEMUX circuit 5 is sent to the system controller 17.

  The digital broadcast AV decoder 7 demodulates the video information and audio information sent from the DEMUX circuit 5. The video signal obtained by the digital broadcast AV decoder 7 is sent to the video processing circuit 8 via the selector 21. The audio signal obtained by the digital broadcast AV decoder 7 is sent to the audio processing circuit 12 via the selector 22.

  When selecting an analog broadcast program, the system controller 17 sends a control signal for channel selection to the analog broadcast tuner 2, and when selecting a digital broadcast program, the digital broadcast tuner 4 A control signal for channel selection is sent to the DEMUX circuit 5. Further, the system controller 17 sends an OSD control signal for on-screen display of a program guide screen, various setting screens, messages and the like to the OSD display circuit 18. The OSD display circuit 18 generates OSD display data and sends it to the multiplexer (synthesis circuit) 9.

  The system controller 17 stores data such as program information sent from the analog broadcast AV decoder 6 and program information sent from the DEMUX circuit 5 in the nonvolatile memory 19. A remote control signal from the remote control transmitter 15 is input to the system controller 17 via the remote control light receiver 16.

  The system controller 17 switches the video signal and audio signal from the analog broadcast AV decoder 6 and the video signal and audio signal from the digital broadcast AV decoder 7 by controlling the selectors 21 and 22.

  The video signal obtained by the video processing circuit 8 is sent to the multiplexer 9. The multiplexer 9 superimposes the display data sent from the OSD display circuit 18 on the video signal output from the video processing circuit 8 and sends it to the video output circuit 10. The video signal output from the video output circuit 10 is sent to the CRT 11.

  The audio signal obtained by the audio processing circuit 12 is sent to the speaker 14 via the audio output circuit 13.

  In this embodiment, when the reception state of a digital broadcast program is deteriorated while the digital broadcast program is being viewed, if the same program is broadcast by analog broadcast, the view program is automatically switched to the same program of analog broadcast. A function that automatically switches the viewing program to the same program of the digital broadcast when the reception state of the analog broadcast program is deteriorated while the analog broadcast program is being viewed and the same program is being broadcast by the digital broadcast. (Program automatic switching function).

  FIG. 2 shows a processing procedure of the system controller 17 for achieving the received program automatic switching function.

  First, the electric field strength of the program currently being viewed is acquired from the tuner (step S1). When a digital broadcast program is being viewed, the electric field strength of the currently viewed program is acquired from the digital broadcast tuner 4, and when an analog broadcast program is being viewed, the current broadcast program is viewed. The electric field strength is acquired from the analog broadcast tuner 2.

  Next, it is determined whether or not the acquired electric field strength is equal to or higher than a predetermined level (step S2). If the acquired electric field strength is greater than or equal to the predetermined level, the process returns to step S1.

  If it is determined in step S2 that the acquired electric field strength is less than the predetermined level, the currently selected one of the analog broadcast and the digital broadcast is selected based on the program information stored in the nonvolatile memory 19. It is determined whether or not the same program as the currently viewed program is currently being broadcast by the broadcast wave that is different from the broadcast wave (step S3).

  If it is determined that the same program as the currently viewed program is not currently being broadcast by a broadcast wave different from the currently selected broadcast wave, the process returns to step S1.

  If it is determined in step S3 that the same program as the currently viewed program is currently being broadcasted by the broadcast wave that is different from the currently selected broadcast wave, the currently selected broadcast wave The channel selection operation is performed for the same program with a different broadcast wave (step S4). However, the selectors 21 and 22 do not switch.

  Next, the electric field strength of the same program of the broadcast wave that is different from the currently selected broadcast wave is acquired from the tuner (step S5). And it is discriminate | determined whether the acquired electric field strength is more than predetermined level (step S6). If the acquired electric field strength is less than the predetermined level, the process returns to step S1.

  When it is determined in step S6 that the acquired electric field strength is equal to or higher than the predetermined level, the selectors 21 and 22 are configured so that the same program of the broadcast wave different from the currently selected broadcast wave is broadcast. Is controlled (step S7). Then, the process returns to step S1.

  In the above embodiment, the viewing program is switched between digital broadcasting and analog broadcasting. However, the viewing program may be switched between CS digital broadcasting, BS digital broadcasting, and terrestrial digital broadcasting. . That is, the viewing program may be switched between a plurality of types of broadcast waves with different networks. However, in order to be able to switch viewing programs between CS digital broadcasting, BS digital broadcasting, and terrestrial digital broadcasting, a tuner is required for each digital broadcasting.

It is a block diagram which shows the structure of a television receiver. It is a flowchart which shows the process sequence of the system controller 17 for achieving the received program automatic switching function.

Explanation of symbols

1 Analog Broadcasting Antenna 2 Analog Broadcasting Tuner 3 Digital Broadcasting Antenna 4 Digital Broadcasting Tuner 5 DEMUX Circuit 6 Analog Broadcasting AV Decoder 7 Digital Broadcasting AV Decoders 21 and 22 Selector 17 System Controller

Claims (1)

In a television receiver having a function of receiving a plurality of types of broadcast waves with different networks,
First means for receiving and holding program information for each broadcast wave;
A second means for monitoring the electric field strength of the viewing program;
When the electric field strength of the viewing program falls below a predetermined level, the first means holds whether or not the same program as the viewing program is currently being broadcast by another broadcast wave having a different network from that of the viewing program. A third means for discriminating based on the program information being
When it is determined that the same program as the viewing program is currently being broadcast by another broadcast wave having a different network from that of the viewing program, it is determined whether the electric field strength of the same program is equal to or higher than a predetermined level. And fourth means for automatically switching the viewing program to the same program when it is determined that the electric field strength of the same program is equal to or higher than a predetermined level,
A television receiver, comprising:

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