JP3505966B2 - Digital broadcast 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 digital broadcast receiver.

[0002]

2. Description of the Related Art Digital broadcasting, DSM (Digit
In Al Storage Media), various devices using a digital compressed image decompression device have begun to be put into practical use.

Conventionally, a digital broadcast receiver is generally constructed as shown in FIG. FIG. 5 is a block diagram showing the configuration of a standard digital satellite broadcast receiver which is an example of a digital broadcast receiver.

In FIG. 5, 100 is a tuner section,
LNB (Low Noise Block) such as BS and CS
Select the desired physical channel from the intermediate frequencies from.

Reference numeral 115 is a channel decoding device, which reproduces a digital signal from the selected physical channel. A program / accompanying information extraction / separation device 130 extracts a desired program and program information from a plurality of multiplexed programs. Reference numeral 145 is a compressed image and audio decompression device (hereinafter referred to as an AV decoder),
Restores encoded and compressed video and audio signals.

Reference numeral 160 denotes a digital video encoding device which encodes a video signal into a baseband signal of a desired signal format such as NTSC / PAL so that it can be connected to a television monitor 210 or the like. A microcomputer 180 controls the system of all parts. A power supply device 1020 supplies power to each block. Reference numeral 1010 denotes a program viewing control apparatus, which allows a user to view or wait for a program using an infrared light (InfraRed) remote controller, a switch on a receiver, or the like. A program decoding block power control switch 1040 stops power supply to the program decoding block 1045 and controls power saving when the receiver is on standby by a control signal from the program viewing control apparatus 1010.

From the tuner 100 to the microcomputer 1
The standby block 1035 composed of 80 etc. is always supplied with power, but this is to acquire mail information etc. sent from the broadcasting station irregularly, and the microcomputer 180 extracts in this way. Next, when the program viewing control apparatus 1010 is set to the program viewing state,
Notify the user by displaying on a screen or the like.

[0008]

However, according to the above configuration, even when the receiver is in the standby state, the operation of the standby block from the tuner to the microcomputer is the same as that at the time of watching the program, so that the power saving is sufficiently performed. I can't plan. On the other hand, if the power supply to the block is stopped, there is a problem that the mail information sent from the broadcasting station cannot be received.

[0009]

In order to solve the above problems, the digital broadcast receiver of the present invention includes a tuner device for selecting a desired physical channel from an intermediate frequency from an LNB such as BS and CS, and a program and a program. A program / accompanying information extraction / separation device that extracts the generated control signal, a microcomputer device that decodes the control information extracted by the program / accompanying information extraction / separation means, and controls the receiver, and a control from the microcomputer device. A timer device for giving time information, a power supply device for supplying power to each part of the receiver, a program viewing control device for outputting a control signal for switching between a standby state and a viewing state of the receiver by a signal from an infrared remote controller, From the tuner, a first logical sum device that takes the logical sum of the output signal from the timer device and the output signal from the program viewing control device,
A standby block power control switch for controlling power supply to the standby block up to the program / accompanying information extraction / separation means,
And a program decoding block power control switch for controlling power supply to a block from the V decoder to the digital video encoder. The standby block power control switch is operated by a receiver stop signal from a broadcasting station. The power supply to the standby block from the tuner to the program / accompanying information extraction / separation means is stopped, and it automatically returns after a fixed time.

Further, in the embodiment of the second invention, a periodic signal generator for generating a pulse signal of a constant period at a period set by a control signal from a broadcasting station, a signal output from a timer device and the period. A second logical sum device for calculating the logical sum of output signals from the signal generator is provided, and the constant set by the broadcasting station is set even while the power supply to the standby block from the tuner to the program / accompanying information extraction / separation device is stopped. It is characterized by entering a standby state at a cycle.

According to the present invention, since it is possible to control the power supply of the receiver from the side of the broadcasting station which sends the message information and the like, it is possible to unnecessarily wait for the receiver to receive the message etc. from the side of the broadcasting station. There is no need to maintain it, and efficient power saving becomes possible.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The first embodiment of the present invention is B
A tuner device for selecting a desired physical channel from an intermediate frequency from an LNB such as S, CS, a program / accompanying information extracting / separating device for extracting a program and a control signal multiplexed in the program, and the program / accompanying information extracting / separating device. A microcomputer device that decodes the control information extracted by the means and controls the receiver, a timer device that gives time information under the control of the microcomputer device, a power supply device that supplies power to each part of the receiver, and an infrared ray. A program viewing control device that outputs a control signal for switching between a standby state and a viewing state of the receiver in response to a signal from an optical remote controller and the output signal from the timer device and the output signal from the program viewing control device are ORed. A first OR device and a standby block power control switch for controlling power supply to the standby block from the tuner to the program / accompanying information extraction / separation means. And pitch, and has a configuration in which a program decoded block power control switch for controlling the power supply to the program decoded block from the AV decoder to a digital video encoder.

When there is no plan to send information such as a message from the broadcasting station to the target receiver for a certain period of time, power supply to the standby block from the tuner to the program / accompanying information extraction / separation device is performed. The receiver has a function of completely stopping by a receiver stop signal from the broadcasting station, and the timer device in the receiver automatically starts power supply after a predetermined time.

Next, a second aspect of the present invention, a digital broadcast receiver, comprises a periodic signal generator for generating a pulse signal for a fixed period at a period set by a control signal from a broadcasting station, and a timer device. And a second logical sum device for calculating the logical sum of the signal output of 1 and the output signal from the periodic signal generator.

Then, even while the power supply to the standby block from the tuner to the program / accompanying information extraction / separation device is stopped, the receiver enters the standby state at a constant cycle set by the broadcasting station, so that the receiver is urgently urged. It also has an effect of making it possible to respond when sending a message or the like.

(Embodiment 1) An example of the first and second embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the main part of the digital broadcast receiver in this embodiment. The description of the configuration and common parts of the conventional device shown in FIG. 5 will be omitted. In FIG. 1, 300 is a timer device, which is controlled by the microcomputer 180. Reference numeral 1010 denotes a program viewing control apparatus similar to the conventional example, which is used by the AV decoder 14 when viewing a program.
5 and the power supply control signal to the program decoding block 1045 including the digital video encoder 160 and the like.

A program decoding block power control switch 1040 controls power supply to the program decoding block from the AV decoder to the digital video encoder. 10
A standby block power control switch 30 controls the power supply from the tuner to the standby block from the program / accompanying information extraction / separation means.

Numeral 1050 is a first logical sum device, which outputs the logical sum of the control signal from the program viewing control device 1010 and the output signal of the timer device 300 to the standby block power control switch 1030. The operation will be described below with reference to FIG. FIG. 2 is a timing chart showing the signal timing of each part in FIG.

First, a description will be given from the time when the receiver is in the program viewing state. At this time, the user
When the program viewing is terminated, the program viewing control device 1010
Outputs a control signal in the standby state as shown in FIG.
By this signal, the program decoding block power control switch 1
Reference numeral 040 denotes an AV decoder 145 which is unnecessary when waiting,
The power supply to the program decoding block 1045 including the digital video encoder 160 and the like is stopped.

On the other hand, since the output signal from the timer device 300 is connected to the standby block power control switch 1030 via the first OR device 1050, the tuner 100 to the standby block 103 composed of the microcomputer 180.
The power supply to 5 continues as it is. Next, when the stop signal of the receiver is received from the broadcasting station as shown in FIG. 2, the microcomputer 180 decodes this signal and sets the timer device 300. According to this setting, the timer device 300 outputs the Low signal for a certain period as shown in FIG.

In the first OR device 1050, at this time, the signal from the program viewing control device 1010 and the timer device 300.
Since both signals are in the Low state, the Low signal is output to the standby block power control switch 1030. In the standby control switch 1030, the low signal stops the power supply to the standby block 1035 for a certain period of time to reduce power consumption.

When the output signal of the timer device 300 becomes High after a certain period of time, the standby block power control switch 1030 restarts the power supply to the standby block 1035.

Next, when the receiver stop signal from the broadcasting station is received again as shown in FIG. 2, the supply of power to the standby block 1035 is similarly started to stop.

Further, even when the power supply to the standby block 1035 is stopped, as shown in FIG. 2, the user performs a program viewing operation by remote control operation or the like, and a high signal is output from the program viewing control apparatus 1010. Then, power supply to the program decoding block 1045 is started. At the same time, the High signal from the program viewing control apparatus 1010 is transmitted to the standby block power control switch 1030 via the first OR device 1050, and the standby block 1
Power supply to 035 is started, and the program can be viewed normally.

(Second Embodiment) An example of a second embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a block diagram showing a configuration of a main part of a digital broadcast receiver which is an example of the second invention, and FIG. 4 is a timing chart showing its operation. The description of the configuration and common parts of the first embodiment of the invention shown in FIGS. 1 and 2 will be omitted here. In FIG. 3, a periodic signal generator 305 is controlled by the microcomputer 180 and generates a periodic signal. Reference numeral 1055 is a second logical sum device, which takes the logical sum of the output signal of the periodic signal generator 3050 and the signal from the timer device 300. The operation will be described below with reference to FIG.

First, the operation from the program viewing state to the standby state is the same as that in the first embodiment.
Next, when the receiver stop signal from the broadcasting station is received, the power supply to the standby block 1035 is stopped here as well. However, here, from the periodic signal generator 305, as shown in FIG.
Since the periodic signal shown in is connected to the standby block power control switch 1030 through the second OR device 1055, the power supply to the standby block 1035 is repeated so that the stop state and the standby state are repeated at regular intervals. Supply is made.
As a result, for example, as shown in FIG. 4, it becomes possible to deliver an urgent message or the like to the receiver even during the power saving control of the receiver.

As a result, the power of the receiver can be controlled from the broadcasting station side, so that it is possible to efficiently save the power of the receiver.

[0030]

As described above, according to the present invention, it is possible to control the electric power of the receiver from the side of the broadcasting station which sends the message information and the like, so that the waiting time of the receiver can be minimized. The power saving can be realized by the inexpensive structure.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a main part of a digital broadcast receiver according to a first embodiment of the present invention.

FIG. 2 is a signal waveform diagram for explaining the operation of the digital broadcast receiver in the first embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a main part of a digital broadcast receiver according to a second embodiment of the present invention.

FIG. 4 is a signal waveform diagram for explaining the operation of the digital broadcast receiver in the second embodiment of the present invention.

FIG. 5 is a block diagram showing a schematic configuration of a conventional digital broadcast receiver.

[Explanation of symbols]

100 tuners 115 Transit path decoding device 130 Program / accompanying information extraction / separation device 145 Audio Video Decoder 160 digital video encoder 180 microcomputer 300 timer device 305 Periodic signal generator 1010 Program viewing control device 1020 power supply 1030 Standby block power control switch 1040 Program decoding block power control switch 1050 First OR device 1055 Second OR device

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04N 5/63 H04H 1/00 H04N 5/445 H04N 7/08 H04N 7/081 H04B 1/16

Claims (2)

(57) [Claims] 1. A power supply device for supplying power to each part of a receiver.
If, BS, intermediate a tuner device for selecting a desired physical channel from the frequency, the program-associated information extraction and separation apparatus for extracting a multiplexed control signal to the programs and program, the program-associated information from the LNB of CS etc. Program / accompanying information extraction / separation from the microcomputer device that decodes the control information extracted by the extraction / separation means and controls the receiver, and the tuner
The standby block that controls the power supply to the standby block
Lock power control switch and AV decoder to digital
Power supply to program decoding block up to video encoder
Program decoding block power control switch to control the
The program decoding block signal is transmitted by a signal from an optical remote controller or the like.
By outputting a control signal to the force control switch,
Program viewing control device for controlling power supply to group decoding block
And the one set by the setting from the microcomputer device.
A timer device for outputting a low signal for a fixed period,
Output signal from the hearing control device and output from the timer device
A signal is input and the output signal from the program viewing control device is
The program decoding block power control switch to the program
It is a signal to stop the power supply to the decoding block and
Outputs a Low signal when the output of the timer device is a Low signal
And a logical OR device for inputting the program decoding block.
Power supply is stopped and the standby block is supplied with power
When a receiver stop signal is received from the broadcasting station in the state
Is the timer set by the setting of the microcomputer.
The standby for a certain period of time when the device outputs a Low signal
A digital broadcast receiver characterized by stopping power supply to a block . 2. A periodic signal generator for generating a pulse signal of a predetermined period at a period set by a control signal from a broadcasting station under the control of the microcomputer, from the periodic signal generating unit and the signal output from the timer device a second logical OR device ORing the output signal, the first logical
The Riwa device replaces the output signal of the timer device among the inputs.
The input signal is the output signal of the second OR device, and
Stopping power supply to the group decoding block and the timer device
During a certain period of time when the Low signal is output,
Set digital broadcast receiver of claim 1, wherein the intends line supplying power to the standby block at a fixed period of the periodic signal generator.