JP3427029B2 - Television receiver - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver having a function of receiving digital broadcasting.

[0002]

2. Description of the Related Art In digital broadcasting such as CS digital broadcasting, qualification data and message data are transmitted to users. Here, the qualification data includes data indicating a channel (program) that can be viewed by the user and key information for descrambling, which is defined by the contract, and is transmitted together with the user ID. Since the qualification data is used to judge whether the program can be viewed by the user, descrambling, etc., the qualification data can be received even when the power of the receiver is turned off. It needs to be in a state where it can be held.

The message data is a mail to the user and is sent together with the user's ID. Since the message data is an email to the user,
It is necessary to make it ready to receive and retain message data even when the power of the receiver is turned off.

For these reasons, in a television receiver having a function of receiving a digital broadcast, the digital receiver circuit for receiving the digital broadcast is powered on even when the power of the receiver is turned off. There is a problem in that it needs to be supplied and power consumption increases.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a television receiver capable of saving power consumption.

[0006]

A first television receiver according to the present invention comprises a digital broadcast program reproducing circuit and a digital receiving circuit which partially include a digital receiving circuit for receiving a digital broadcast . and a memory card connector for mounting a memory card for storing received Ru entitlement data, when receiver is powered off,
Other than the digital receiving circuit in the digital broadcast program playback circuit
In a television receiver in which the power supply to the circuit is always stopped, it is provided between the power source that generates the power for the digital receiving circuit and the digital receiving circuit even when the power of the receiver is turned off. A switch for turning on / off the power supply for the digital receiving circuit to the receiving circuit, a means for determining whether or not the memory card is connected to the memory card connector when the receiver is powered off, and the memory card is a memory It has means for turning on the switch when it is determined that the card is connected to the card connector, and means for turning off the switch when it is determined that the memory card is not connected to the memory card connector. Characterize.

A second television receiver according to the invention has the ability to also receive a digital broadcast in addition to terrestrial broadcasting, terrestrial broadcast program reproducing circuit, a digital receiver circuit for receiving a digital broadcast one Digital broadcasting included in the department
Received by the program playback circuit and digital receiving circuit
That has a memory card connector for mounting a memory card for storing entitlement data, the receiver power supply
When it is off, it supplies power to the terrestrial broadcast program playback circuit and
And other than the digital receiving circuit in the digital broadcast program playback circuit
In a television receiver in which the supply of power to the circuit is always stopped, it is provided between the digital receiving circuit and the power source that generates the power for the digital receiving circuit even when the receiver is turned off, and A switch for turning on / off the power supply for the digital receiving circuit to the digital receiving circuit, a means for determining whether or not the memory card is connected to the memory card connector when the power of the receiver is turned off, and a memory card. A means for turning on the switch when it is determined that the memory card is connected to the memory card connector and a means for turning off the switch when it is determined that the memory card is not connected to the memory card connector Is characterized by.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is applied to a television receiver having a built-in CS digital receiving circuit capable of receiving CS broadcasting in addition to terrestrial broadcasting will be described below with reference to the drawings. To do.

FIG. 1 shows the configuration of a television receiver having a built-in CS digital receiving circuit.

The terrestrial broadcast wave is sent to the terrestrial tuner 2 via the terrestrial antenna 1. The first AV signal (video signal + audio signal) obtained from the terrestrial tuner 2 is sent to the signal switch 5.

A CS broadcast wave using a communication satellite (CS) is sent to a CS digital receiving circuit 4 via a CS antenna 3.

The CS digital receiving circuit 4 passes through a tuner section for performing high frequency processing and demodulation processing, a descramble circuit for descrambled an encrypted signal among digital signals obtained by the tuner section, and a descramble circuit. A DEMUX circuit that separates the transmitted data into MPEG audio data, MPEG video data, program guide information, qualification data, and message data, and demodulates MPEG audio data and MPEG video data to output audio signals and video signals. It is equipped with an MPEG decoder that does.

The CS digital receiving circuit 4 outputs the video signal and audio signal obtained by the MPEG decoder as a second AV signal (video signal + audio signal). CS
The second AV signal obtained from the digital receiving circuit 4 is sent to the signal switch 5.

An IC card (memory card) is connected to the CS digital receiving circuit 4 and the system controller 20 via an IC card connector (memory card connector) 22.
21 is connected. The IC card 21 includes qualification data (including data indicating a channel (program) that can be viewed by the user, key information for descrambling in the descramble circuit), user recognition information,
Viewing history and the like are held.

The CS digital receiving circuit 4 sends the qualification data extracted by the DEMUX circuit to the IC card 21.
To memorize. Further, the CS digital receiving circuit 4 is
When the message data is extracted by the EMUX circuit, the scramble applied to the message data is descrambled using the key information in the IC card 21, and then stored in a memory (not shown).

The system controller 20 is a DEMUX.
The program guide information extracted by the circuit is stored in a memory (not shown). The system controller 20 sends a remote control signal from the remote control transmitter 23 to the remote control receiver 24.
Be entered via.

The system controller 20 sends information for channel selection to the terrestrial tuner 2 and the CS digital receiving circuit 4, and sends a switching signal according to the receiving mode to the signal switcher 5. The reception mode includes a terrestrial broadcast program reception mode and a CS broadcast reception mode. Further, the system controller 20 sends an OSD control signal for causing the CRT 8 to display a program guide screen for CS broadcasting, various setting screens for CS broadcasting, etc. on-screen.
It is sent to the display circuit 12. The OSD display circuit 12 sends the on-screen image information (OSD signal) to the video processing circuit 6.

The signal switch 5 is the system controller 2
Based on the switching signal sent from 0, one of the first and second AV signals is selected, and the video signal and the audio signal included in the selected AV signal are output.

The video signal output from the signal switch 5 is
It is sent to the video processing circuit 6. The video processing circuit 6 synthesizes the video signal output from the signal switch 5 and the OSD signal sent from the OSD display circuit 12. The video signal output from the video processing circuit 6 is C via the video output circuit 7.
Sent to RT8. The audio signal output from the signal switch 5 is sent to the speaker 11 via the audio processing circuit 9 and the audio output circuit 10.

The AC power input to the plug 31 connected to the commercial power supply is sent to the power supply circuit 33 via the main switch 32. The power supply circuit 33 generates an operation power supply (DC power supply) for each circuit by the rectification / step-down operation.

From the power supply circuit 33 to the system controller 2
The DC power supply (power supply for controller) supplied to 0 and the DC power supply (power supply for digital reception circuit) supplied from the power supply circuit 33 to the CS digital reception circuit 4 are provided while the main switch 32 is on. It is always occurring.

When the user turns on the power key by the remote control transmitter 23, that is, when the power of the digital television broadcast receiver is turned on, the system controller 20 sends the power supply circuit 3 by the first power supply control signal C1.
3 is controlled so that the DC power supply to each circuit is output from the power supply circuit 33.

The power supply for the receiving circuit to the CS digital receiving circuit 4 is supplied from the power supply circuit 33 via the CS power supply switch 34. The CS power switch 34 is on / off controlled by a first power control signal C1 and a second power control signal C2 from the system controller 20.

When the main switch 32 is turned on but the power of the digital television broadcast receiver is not turned on, the CS power switch 34 is controlled as follows.

That is, in this case, the system controller 20 connects the IC card connector 22 to the IC card 21.
It is determined whether or not is attached. As the determination method, there are a method of making a determination by attempting communication with the IC card from the system controller 20, and a method of making a determination based on a signal indicating whether or not the IC card is attached from the IC card connector 22.

The IC card 21 is attached to the IC card connector 22.
If it is determined that the CS power switch 34 is attached, the CS power switch 34 is turned on by the second power control signal C2. Therefore, in this case, power is supplied to the CS digital receiving circuit 4.

The IC card 21 is attached to the IC card connector 22.
If it is determined that the power supply is not attached, the system controller 20 sends the second power control signal C2 to the CS
The power switch 34 is turned off. Therefore, in this case, no power is supplied to the CS digital receiving circuit 2.

When the main switch 32 is on and the power of the digital television broadcast receiver is on, the system controller 20 turns on the CS power switch 34 by the first power control signal C1. Let Therefore, in this case, power is supplied to the CS digital receiving circuit 4.

According to the above embodiment, when the IC card 21 is not attached to the IC card connector 22 when the digital television broadcast receiver is powered off, the CS digital receiving circuit 4 is powered on. Since this is not done, power consumption can be reduced.

[0030]

According to the present invention, power consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a television receiver.

[Explanation of symbols]

2 Terrestrial tuner 4 CS digital receiver circuit 20 system controller 21 IC card 22 IC card connector

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-11-122549 (JP, A) JP-A-8-130726 (JP, A) JP-A-2-21389 (JP, A) JP-A-10- 336548 (JP, A) JP 11-112372 (JP, A) JP 11-355752 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04N 5/38-5 / 63 H04N 7/10 H04N 7/14-7/173 H04N 7/20-7/22

Claims (2)

(57) [Claims] 1. A memory card connector for mounting a memory card for storing entitlement data that will be received by the digital broadcast program reproducing circuit and a digital receiver circuit including a part of the digital receiver circuit for receiving the digital broadcast It is equipped with a digital signal when the receiver power is off.
Circuit other than the digital receiving circuit in the broadcast program playback circuit
In a television receiver in which the power supply to the digital receiver circuit is always stopped, it is provided between the digital receiver circuit and the power source that generates the digital receiver circuit power even when the receiver is turned off. Switch for turning on / off the power supply for the digital receiving circuit to the memory, a means for determining whether or not the memory card is connected to the memory card connector when the receiver is powered off, and the memory card for the memory card connector Means for turning on the switch when it is determined that the memory card is connected to the memory card, and means for turning off the switch when it is determined that the memory card is not connected to the memory card connector. And a television receiver. 2. A digital terrestrial broadcast program reproducing circuit having a function of receiving not only terrestrial broadcast but also digital broadcast, and a digital receiving circuit for receiving the digital broadcast as a part.
The memory card for storing entitlement data that will be received by the digital broadcast program reproducing circuit and a digital receiver circuitry has a memory card connector for mounting, receiving
When the power of the image machine is turned off, power is supplied to the terrestrial broadcast program reproduction circuit.
Source and digital receiver in digital broadcast program playback circuit
In a television receiver , the power supply to circuits other than the receiver circuit is always stopped. <br /> Between the power source that generates power for the digital receiver circuit and the digital receiver circuit even when the receiver is powered off. Switch for turning on / off the power supply for the digital receiving circuit to the digital receiving circuit, and whether the memory card is connected to the memory card connector when the receiver is turned off. Means to judge, means to turn on the switch when it is judged that the memory card is connected to the memory card connector, and turn off the switch when it is judged that the memory card is not connected to the memory card connector A television receiver characterized in that the television receiver is provided with: