JP4460955B2 - TV receiver compatible with analog broadcasting abolition - Google Patents

Description

  The present invention relates to a television receiver capable of receiving both analog broadcasting and digital broadcasting, and more particularly, to a power saving technique in a television receiver after analog broadcasting is abolished.

  Television broadcasting is in a transitional period in its broadcasting system, and both analog broadcasting and digital broadcasting are performed, but it has been decided that analog broadcasting will be abolished in the future. The conventional television receiver is equipped with at least two tuners for analog broadcasting and digital broadcasting, and both tuners are always turned on when the television receiver is turned on.

Further, Patent Document 1 detects whether a selected channel is a digital broadcast or an analog broadcast in a receiving system capable of receiving terrestrial analog broadcast and terrestrial digital broadcast, and demodulates each broadcast based on the detection result. And selecting a decoding path.
JP 2000-184307 A

  However, conventional television receivers are not designed to turn off the power for each analog and digital tuner, or to automatically turn off the analog tuner by automatically determining the abolition of analog broadcasting. Even after the broadcasting is abolished, power is supplied to a receiving circuit portion such as an analog tuner that is not necessary for receiving the digital broadcasting, resulting in a power saving problem that power consumption is increased.

  Patent Document 1 describes detection of a channel selection channel being an analog broadcast or a digital broadcast, but no consideration is given to power saving measures after the abolition of analog broadcast.

  An object of the present invention is to provide a television receiver capable of stopping power supply to an analog receiving circuit that is no longer necessary after the abolition of analog broadcasting.

In order to solve the above problems, the present invention mainly adopts the following configuration.
In a television receiver that can receive both analog and digital broadcasts,
An analog broadcast signal processing unit that processes only an analog broadcast signal, a digital broadcast signal processing unit that processes only a digital broadcast signal, a common processing unit that processes both broadcast signals, a control unit that controls each processing unit, A power supply unit for supplying power to the analog broadcast signal processing unit and other processing units,
The control unit or the microcomputer with built-in television receiver automatically detects that the analog broadcasting has been abolished,
The power supply from the power supply unit to the analog broadcast signal processing unit is stopped based on the detection result.

  In the television receiver, the abolition of the analog broadcast is automatically detected based on channel scan, viewing history information search, or channel map information.

In a television receiver that can receive both analog and digital broadcasts,
An analog broadcast signal processing unit that processes only an analog broadcast signal, a digital broadcast signal processing unit that processes only a digital broadcast signal, a common processing unit that processes both broadcast signals, a control unit that controls each processing unit, A power supply unit that supplies power to each processing unit,
Provide a dedicated power line for supplying power only from the power supply unit to the analog broadcast signal processing unit,
Manual operation means for turning off the power of the dedicated power line by manual operation based on the information on the abolition of analog broadcasting is further provided .

  According to the present invention, in a television receiver capable of receiving both analog and digital broadcasts, the power consumption of the television receiver can be reduced when the analog broadcast is abolished.

  Embodiments of a television receiver according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing a schematic configuration in an embodiment of the television receiver of the present invention. FIG. 2 is an explanatory diagram showing various detection methods for abolishing analog broadcasting in this embodiment.

  Here, 1 is an analog / digital broadcast receiving unit and power supply unit, 2 is an analog TV reception dedicated circuit, 3 is a digital TV reception dedicated circuit, 4 is a video processing unit, 5 is a power supply unit, 6 is a controller, and 7 is an analog tuner. , 8 is an A / D converter, 9 is a digital tuner unit, 10 is an MPEG processing unit, 11 is a power switch for an analog TV reception dedicated circuit, 12 is an antenna, and 13 is a display unit.

  In FIG. 1, an analog broadcast signal received by an antenna 12 is input to an analog television reception dedicated circuit 2 including an analog tuner unit 7 and an A / D converter 8, sent to a video processing unit 4, and displayed on a display unit 13. Is displayed. Similarly, a digital broadcast signal received by the antenna 12 is input to a digital television reception dedicated circuit 3 including a digital tuner unit 9 and an MPEG processing unit 10, transmitted to the video processing unit 4, and displayed on the display unit 13. The The television receiver according to the embodiment of the present invention can receive both analog broadcast and digital broadcast and display images.

  In the illustrated example, the analog TV reception dedicated circuit 2 includes the analog tuner 7 and the A / D converter 8. However, the circuit configuration is not limited to this, and the circuit configuration of the analog tuner 7 alone may be used. A circuit configuration including the above may be used. In short, an analog broadcast signal processing unit that processes only analog broadcast signals is targeted.

  In addition, the television receiver in this embodiment has a dedicated analog television reception circuit 2, a digital television reception dedicated circuit 3, and a controller 6 for controlling the power supply unit 5, and further to the analog television reception dedicated circuit 2 and other circuits. It has the power supply part 5 which supplies a power supply. Further, the power supply unit 5 includes a switch 11 for the analog television reception dedicated circuit 2 in a power supply line supplied to the analog television reception dedicated circuit 2. On / off of the switch 11 is controlled by the controller 6.

  FIG. 2 shows a method for detecting that analog broadcasting has been abolished. One of the features of the present invention is that the result detected by any one of the detection methods is related to the OFF control of the switch 11 by the controller 6.

  In FIG. 2, one of the methods for detecting analog broadcast abolition is manual setting by the user. When the analog broadcast abolition setting menu, which is scheduled to be abolished in the near future, can be displayed on the television receiver, and the user learns by some means that the analog broadcast has been abolished Display this setting menu and specify YES. By designating YES, the controller 6 recognizes the abolition of the analog broadcast, turns off the switch 11, and turns off the power to the analog television reception dedicated circuit 2. Further, instead of the switch 11 in the power supply unit 5, a hardware operation switch is provided in the television receiver, and when the user knows that the analog broadcasting is abolished, the operation switch is directly pressed and the analog television is The power supply to the reception dedicated circuit 2 may be stopped.

  Further, the abolition of analog broadcasting can be detected using channel map information transmitted from a broadcasting station. Before analog broadcasting was abolished, there was a period of coexistence with digital broadcasting. In digital broadcasting, channel map information as shown in FIG. 2, that is, whether the broadcasting of the channel name is analog broadcasting or digital broadcasting is notified. When the analog broadcasting is abolished, the channel map information is changed from “digital / analog” to “digital”. Therefore, the controller 6 detects the state of the flag associated with this change and sends it to the analog TV reception dedicated circuit 2. Automatically turn off the. Specifically, a flag is set when the “analog” shown in the figure disappears, and the operation is performed so that the analog broadcast is abolished when this flag is set. In addition to using the channel map information shown in the digital broadcast, information similar to the information shown in the analog broadcast can be sent as a text broadcast. Can be detected automatically.

  Further, the abolition of analog broadcasting can be detected by using channel scanning in a television receiver. With a function to periodically scan the TV receiver and determine whether analog broadcasting is found, if it is not found, it is determined that analog broadcasting has been abolished, channel scanning is stopped, The switch 11 is turned off to turn off the power to the analog television reception dedicated circuit 2. If not found, the scanning operation is continued. Here, when the analog broadcast is not found in the channel scan, the video screen is not displayed, so that the abolition of the analog broadcast can be automatically detected by detecting the amplitude of the video output.

  Also, analog broadcast abolition can be detected using user viewing history information in a television receiver. By providing a function for determining whether or not analog broadcasting has been viewed within a predetermined number of days in the past (within M days in the display of FIG. 2), it is determined that analog broadcasting has been abolished, and viewing history search is performed. In addition to stopping, the switch 11 is turned off to turn off the power to the analog television reception dedicated circuit 2. When the analog broadcast is viewed, the viewing history search operation is continued.

  Thus, the abolition of analog broadcasting can be detected by a microcomputer (not shown in FIG. 1) provided in the television receiver when using channel map information, channel scanning, or viewing history information. Further, the above-described detection function of the microcomputer can be realized by the controller 6 shown in FIG.

  As described above, the feature of the present invention is that a television receiver capable of receiving both analog broadcast and digital broadcast automatically detects that analog broadcast has been abolished, or by manual setting by the user, After the abolition of analog broadcasting, the power supply to analog receiving circuits that are no longer necessary is stopped so that power consumption can be reduced. Here, in order to automatically detect the abolition of analog broadcasts, periodic channel scans are performed to detect the presence or absence of analog broadcasts. If they are not found, the power to the analog reception circuit is stopped, or the user If the analog broadcast is not viewed at all even though the digital broadcast is being viewed, the analog tuner is automatically turned off, or the analog broadcast is sent from the channel map information transmitted. Is detected and the power to the analog receiver circuit is stopped. In addition, the user can manually turn off the power to the analog receiving circuit from the menu setting screen.

It is a block diagram which shows schematic structure in the Example which concerns on the television receiver of this invention. It is explanatory drawing which shows the various detection methods of an analog broadcast abolition in a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Analog / digital broadcast receiving part and power supply part 2 Analog television reception exclusive circuit 3 Digital television reception exclusive circuit 4 Video processing part 5 Power supply part 6 Controller 7 Analog tuner part 8 A / D converter 9 Digital tuner part 10 MPEG processing part 11 Analog Power switch for TV reception dedicated circuit 12 Antenna 13 Display unit

Claims (5)

In a television receiver that can receive both analog and digital broadcasts,
An analog broadcast signal processing unit that processes only an analog broadcast signal, a digital broadcast signal processing unit that processes only a digital broadcast signal, a common processing unit that processes both broadcast signals, a control unit that controls each processing unit, A power supply unit for supplying power to the analog broadcast signal processing unit and other processing units,
The control unit or the microcomputer with built-in television receiver automatically detects that the analog broadcast has been abolished,
A television receiver, wherein power supply from the power supply unit to the analog broadcast signal processing unit is stopped based on the detection result. In claim 1,
The abolition of the analog broadcast is automatically detected when a channel scan is performed at a predetermined time interval and the analog broadcast is not found. In claim 1,
The abolition of the analog broadcast is performed by searching viewing history information for a predetermined number of days in the past, determining that the analog broadcast is abolished when the analog broadcast is not found , and automatically detecting based on the determination. And TV receiver. In claim 1,
The abolition of the analog broadcast is automatically detected by detecting a notification in the channel map information transmitted from the broadcast station that informs whether the broadcast of each channel is an analog broadcast or a digital broadcast. And TV receiver. In a television receiver that can receive both analog and digital broadcasts,
An analog broadcast signal processing unit that processes only an analog broadcast signal, a digital broadcast signal processing unit that processes only a digital broadcast signal, a common processing unit that processes both broadcast signals, a control unit that controls each processing unit, A power supply unit that supplies power to each processing unit,
Provide a dedicated power line for supplying power only from the power supply unit to the analog broadcast signal processing unit,
A television receiver , further comprising manual operation means for turning off the power of the dedicated power line by a manual operation based on information on abolition of analog broadcasting.

Images