JPH11122586A - Data broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption in the standby state without causing any hindrance onto updated data in the data broadcast receiver. SOLUTION: A timer 20 is set to activate decoding of a decode section 14 intermittently in a standby state. A CPU 19 controls a power supply section 19 to supply power to a channel selection circuit 11 - a memory 15 in a way that decoding by the decode section 14 is conducted only for a time set by the timer 20 and controls the power supply section 19 to interrupt power from the channel selection circuit 11 - the memory 15 in a way that decoding by the decode section 14 is stopped for a time other than the time set by the timer 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data broadcast receiver for receiving various data broadcasts such as a text broadcast.

[0002]

2. Description of the Related Art In television broadcasting, teletext broadcasting is a representative example of transmitting data by superimposing data on a vertical flyback section. Also, recently, various data broadcasts called intertext, Adams, bitcast, and the like have come to appear. In these data broadcasts, unlike an actual broadcast program, it is possible to obtain information (news, weather forecast, etc.) desired by a viewer when he / she wants to watch.

FIG. 5 is a block diagram showing an example of a conventional data broadcast receiver. In FIG. 5, a tuning circuit 1 receives a data broadcast superimposed on a television signal, and a video detector 2 detects it. The A / D converter 3 converts the output of the video detector 2 from analog to digital. The decoding unit 4 decodes the code data input from the A / D conversion unit 3, and stores the decoded data in the memory 5. The D / A converter 6 D / A converts the data stored in the memory 5 and outputs a character signal to be displayed on a screen of a display unit (not shown).

[0004] The above operation is executed by control of the CPU 7 or software of the decoding unit 4. CP
The front display / operation unit / remote control light receiving unit 8 and power supply unit 9 are also connected to U7. An operation input by the front display / operation unit / remote control light receiving unit 8 or a remote control input by a remote control transmitter (not shown) is input to the CPU 7 via the front display / operation unit / remote control light reception unit 8. Also, CP
The control state by U7 is displayed by the front display / operation unit / remote control light receiving unit 8. The power supply section 9 supplies power to each section of the circuit under the control of the CPU 7.

[0005]

In the conventional data broadcasting receiver described above, in order to cope with data broadcasting updated several times a day, there are two operation states: a power-on operation state and a power-off standby state. In each case, the decoding operation by the decoding unit 4 and the accumulation operation in the memory 5 are performed. The power-off state refers to a state in which the main power is supplied, but apparently does not operate. This corresponds to a state in which no image is displayed on the screen, taking a television receiver as an example. That is, in the standby state where the power is turned off, only the front display and the D / A conversion unit 6 in the front display / operation unit / remote control light receiving unit 8 are turned off.
Thus, when the power is turned on from the standby state, the latest data can be immediately viewed.

[0006] However, the conventional data broadcast receiver has a problem that even in a standby state in which the power is turned off, power consumption is substantially equal to that in an operation state in which the power is turned on. In terms of recent energy savings, high power consumption is not preferable. To solve this, when the power is turned off, the decoding unit 4
May be stopped, but it takes a long time to display the latest data after the power is turned on, which is also undesirable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to reduce power consumption in a standby state in a data broadcast receiver without hindering data updating.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides a receiving section (11, 12) for receiving a data broadcast and a decoding section for decoding data received by the receiving section. Unit (14), a memory (15) for storing decoded data, and a power supply unit (1) for changing the mode of power supply between the operating state and the standby state.
9) and a timer (20) for setting a decoding operation by the decoding unit intermittently in the standby state in the data broadcasting receiver including the control unit (17) for controlling each circuit unit. A control unit that controls the power supply unit to supply power to the reception unit and the decoding unit so as to operate decoding by the decoding unit and accumulation of data in the memory only for a time set by the timer. Controlling the power supply unit to cut off supply of power to the reception unit and the decoding unit so as to stop decoding by the decoding unit and accumulation of data in the memory except for a time set by the timer. It is intended to provide a data broadcast receiver characterized in that it is configured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A data broadcast receiver according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing an embodiment of a data broadcast receiver according to the present invention.
3 is a flowchart for explaining the operation of the data broadcast receiver of the present invention, and FIGS. 3 and 4 are diagrams for explaining the operation of the data broadcast receiver of the present invention.

In FIG. 1, a tuning circuit 11 receives a data broadcast superimposed on a television signal,
2 detects it. Tuning circuit 11 and video detector 12
Is operating as a data broadcast receiving unit. The A / D converter 13 A / D converts the output of the video detector 12. The decoding unit 14 decodes the code data input from the A / D conversion unit 13 and stores the decoded data in the memory 15. As the memory 15, a non-volatile memory can be used. The D / A converter 16 D / A converts the data stored in the memory 15 and outputs a character signal to be displayed on a screen of a display unit (not shown).

The above operations are controlled by the CPU 17 and
This is executed by software of the decoding unit 14 or the like.
The CPU 17 includes a front display / operation unit / remote control light receiving unit 1
8 and the power supply unit 19 are also connected. Front display / operation unit /
An operation input from the remote control light receiving unit 18 or a remote control input from a remote control transmitter (not shown) is input to the CPU 17 via the front display / operation unit / remote control light receiving unit 8. The control state of the CPU 17 is displayed by the front display / operation unit / remote control light receiving unit 18. In the present embodiment, the front display unit, the operation unit, and the remote control light receiving unit are shown as one front display / operation unit / remote control light receiving unit 8 in one block. .

The power supply section 19 supplies power to each section of the circuit under the control of the CPU 17. The power supply unit 19 is in an operation state in which the power is turned on including a front display in the front display / operation unit / remote control light receiving unit 8 when the main power is on, And a standby state in which the power supply is turned off, so that the mode of power supply differs between the operation state and the standby state. As described above, conventionally, in the operation state and the standby state, power is supplied only when the front display in the front display / operation unit / remote control light receiving unit 8 or the D / A conversion unit 16 is on or off. However, the present invention is characterized in the power supply mode during the standby state, as described later.

That is, in the present invention, a timer 20 is newly provided, and the timer 20 is connected to the CPU 17. The CPU 17 controls the power supply by the power supply unit 19 so that the decoding unit 14 performs the decoding operation and the accumulation operation in the memory 15 every time set by the timer 20 or only during the time set by the timer 20.

In the standby state, when the decoding unit 14 performs decoding by setting by the timer 20 in the standby state, the channel selection circuit 11 to the memory 15 and the CP
The power unit 19 is controlled so as to supply power to the U 17, the front display / operation unit / remote control light receiving unit 18, and the timer 20.
On the other hand, the decoding unit 14
Is not performed, the channel selection circuits 11 to D
The power supply unit 19 is controlled so that power is supplied only to the CPU 17, the front display / operation unit / remote control light receiving unit 18, and the timer 20 without supplying power to the / A conversion unit 16. In the standby state, the front display on the front display / operation unit / remote control light receiving unit 18 may be off.

In the operating state, the CPU 17 controls the power supply unit 19 so as to constantly supply power to each part of the circuit, and decodes the data by the decode unit 14 and stores the data in the memory 15.
Make sure that updates are always made.

As described above, in the data broadcasting receiver of the present invention, the decoding operation by the decoding section 14 is intermittently operated in the standby state, so that the data update in the standby state is not hindered. Electric power can be reduced.

Here, the operation of the data broadcast receiver of the present invention will be further described with reference to FIG. In FIG.
In step S1, a standby state is set in which decoding by the decoding unit 14 is not performed. In step S2, the CPU 17 determines whether or not the time to be decoded has reached the setting by the timer 20. If it is not time to decode, the process returns to step S1, and if it is time to decode, the process proceeds to step S3.

In step S3, the tuning circuit 11 to the memory 1
5 is also supplied with power, a decoding operation is performed, and data is updated. Then, in step S4, it is determined whether or not the accumulation in the memory 15 has been completed. If not completed, the process returns to step S3, and if completed, the process returns to step S1.
As described above, in the present invention, in the standby state, the decoding by the decoding unit 14 and the accumulation of the data in the memory 15 are operated for the time set by the timer 20, and the decoding and the decoding by the decoding unit 14 are performed at other times. The accumulation of data in the memory 15 is stopped.

The setting by the timer 20 is performed by an operation input from the front display / operation unit / remote control light receiving unit 18 or a remote control input, and the input is set to the timer 20 via the CPU 17.

FIGS. 3A and 3B show an example in which the decoding operation is set every two hours. FIG. 3A shows a case where on-screen display is performed on the screen of the display unit, and FIG. 2 shows a case in which the display is performed by the display unit by the unit / remote control light receiving unit 18. Thus, the decoding operation can be performed at the time interval set by the user. The on-screen display may be performed by an on-screen signal generator included in the CPU 17 or an on-screen signal generator different from the CPU 17.

FIG. 4 shows an example in which the decoding operation is set to start at an arbitrary time set by the user.
(A) is an on-screen display on the screen of the display unit, (B) is a front display / operation unit / remote control light receiving unit 18
Shows a case where the display is performed by a display unit. With this configuration, it is possible to make settings in accordance with the user's life pattern. If the time zone for watching the data broadcast is almost fixed, it is possible to update the data extremely efficiently by setting the decoding operation to be activated slightly before that time.

For example, if a person who wakes up at 8:00 every morning, goes out at 9:00, and goes home at 21:00, sets the timer 20 to activate the decoding operation at 7:00 and 20:00 every day. The latest data can be obtained immediately after turning on the power of the receiver when and after returning home. In this case, useless decoding operation can be eliminated more than in the example shown in FIG. 3, and power consumption can be effectively reduced.

The data broadcast receiver of the present invention may be either a form built in a television receiver or a form of a so-called set-top box.

[0024]

As described in detail above, the data broadcasting receiver of the present invention is provided with a timer for setting the decoding operation of the decoding unit to operate intermittently in the standby state, and for the time set by the timer. Only the power supply unit is controlled so as to supply power to the receiving unit and the decoding unit so as to operate the decoding by the decoding unit and the accumulation of the data in the memory, and the decoding by the decoding unit and the storage in the memory other than the time set by the timer. Since the power supply unit is controlled so as to shut off the power supply to the receiving unit and the decoding unit so as to stop the data accumulation, the power consumption in the standby state is reduced without hindering the data update. be able to.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the present invention.

FIG. 3 is a diagram for explaining the operation of the present invention.

FIG. 4 is a diagram for explaining the operation of the present invention.

FIG. 5 is a block diagram showing a conventional example.

[Explanation of symbols]

 11 Tuning Circuit (Receiver) 12 Video Detector (Receiver) 13 A / D Converter 14 Decoder 15 Memory 16 D / A Converter 17 CPU (Control Unit) 18 Front Display / Operation Unit / Remote Control Receiver 19 Power supply 20 timer

Claims (1)

[Claims] 1. A receiving section for receiving a data broadcast, a decoding section for decoding data received by the receiving section, a memory for storing the decoded data, and a mode of power supply between an operating state and a standby state. A data broadcast receiver comprising a power supply unit for controlling the operation of each of the circuits, and a timer for setting the decoding unit to operate the decoding operation intermittently in the standby state. The unit controls the power supply unit to supply power to the receiving unit and the decoding unit to operate decoding by the decoding unit and accumulation of data in the memory only for a time set by the timer,
The power supply unit is controlled so as to stop supply of power to the reception unit and the decoding unit so as to stop decoding by the decoding unit and accumulation of data in the memory except for a time set by the timer. A data broadcast receiver characterized by the following.