JP3630956B2 - Television signal receiver - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a television signal receiving apparatus, and more particularly to a television signal receiving apparatus including, for example, a digital broadcast receiver.
[0002]
[Prior art]
In this type of conventional television signal receiving apparatus, since messages and program information from digital broadcast stations are received, the digital broadcast receiver is turned on even when the main power of the television signal receiving apparatus is off. The above-described information loss was prevented. However, when the main power is off, only the television microcomputer (TV microcomputer) is always on. In addition, when not watching CS broadcast, it can set to the mode which does not watch CS broadcast with a menu, and when this mode is set, the power supply of a digital broadcast receiver will be always turned off.
[0003]
[Problems to be solved by the invention]
However, this conventional technique has a problem that the power consumption of the digital broadcast receiver is increased because the power supply of the digital broadcast receiver is always on as described above. Incidentally, in a television signal receiver that does not incorporate a CS tuner, the power consumption when the main power source is on is 100 W to 200 W, and the power consumption when the main power source is off is about 2 W, whereas digital television reception is possible. The power consumption of the machine alone was 25W.
[0004]
Therefore, a main object of the present invention is to provide a television signal receiving apparatus with a built-in digital broadcast receiver that can reduce power consumption.
[0005]
[Means for Solving the Problems]
According to the present invention, in a television signal receiving apparatus including a terrestrial broadcast receiver and a digital broadcast receiver, first switch means for turning on / off power supply to the terrestrial broadcast receiver, and power supply to the digital broadcast receiver A second switch means for turning on / off the power supply, a microcomputer for controlling on / off of the main power supply to control switching of the first switch means and the second switch means, and a supply means for constantly supplying power to the microcomputer. The first switch means and the second switch means are turned on when the main power supply is in the on state, and the first switch means is turned off and the second switch means is turned on / off intermittently when the main power supply is in the off state. A television signal receiver characterized by the above.
[0006]
[Action]
For example, a television signal receiver is provided with a terrestrial broadcast receiver in addition to a digital broadcast receiver. When the main power supply of the television signal receiving apparatus is in an off state, the TV microcomputer turns on / off the digital broadcast receiver every 10 minutes. However, for example, when the new contract mode is set, the digital broadcast receiver is turned on for one week from the mode setting.
[0007]
【The invention's effect】
According to the present invention, since the digital broadcast receiver is intermittently turned on / off when the main power supply of the television signal receiving apparatus is in the off state, power consumption can be reduced.
The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.
[0008]
【Example】
Referring to FIG. 1, a television receiver 10 of this embodiment includes a digital broadcast receiver 12 and a terrestrial broadcast receiver 14. The digital broadcast receiver 12 includes a CS tuner 16, and a CS broadcast antenna 18 is connected to the CS tuner 16. CS broadcasts, messages, program information, etc. received by the CS broadcast antenna 18 are given to the CS tuner 16. In CS tuner 16, a transponder including a desired channel is selected. The selected broadcast data is given to the CS signal processing circuit 20, and the CS signal processing circuit 20 performs processing such as QPSK demodulation, packet separation, and MPEG demodulation. The video data obtained in this way is converted into an NTSC format composite video signal (analog signal) by the NTSC encoder 22, and this composite video signal is applied to the terminal 24. The digital broadcast receiver 12 also includes a CS microcomputer 26, which receives a reception channel selection and NTSC encoding instruction.
[0009]
The terrestrial broadcast receiver 14 includes a terrestrial broadcast tuner 28 to which a terrestrial broadcast antenna 30 is connected. Accordingly, the terrestrial broadcast channel received by the terrestrial broadcast antenna 30 is selected by the terrestrial broadcast tuner 28. The intermediate frequency signal (IF signal) of the television signal of the selected channel is extracted by the terrestrial broadcast tuner 28. The extracted video (IF) signal is subjected to processing such as amplification and detection by the terrestrial signal processing circuit 32, and a composite video signal generated thereby is given to the terminal 34.
[0010]
The terrestrial broadcast receiver 14 also includes a TV microcomputer 36. The TV microcomputer 36 provides a terrestrial broadcast tuner 28 with a terrestrial channel selection command in response to key input from a remote controller (not shown). The CS microcomputer 26 and the TV microcomputer 36 are connected by a bus, and the TV microcomputer 36 gives a CS channel selection command to the CS microcomputer 26 in response to a key input from the remote controller. On the other hand, information (message or program information from the broadcasting station) detected by the CS microcomputer 26 from the CS broadcast signal is given to the TV microcomputer 36. That is, the CS microcomputer 26 and the TV microcomputer 36 exchange data bidirectionally.
[0011]
The switch SW1 is switched in accordance with an instruction from the TV microcomputer 36, and the CS broadcast composite video signal supplied to the terminal 24 or the terrestrial broadcast composite video signal supplied to the terminal 34 is selected. That is, the terminal 34 is selected when a terrestrial broadcast program is being viewed, and the terminal 24 is selected when a CS broadcast program is being viewed (CS mode). The composite video signal selected by the switch SW1 is supplied to the video signal processing circuit 38, and the video signal processing circuit 38 performs processing such as color demodulation. For this reason, the video of the selected channel is output from the CRT 40.
[0012]
The television receiver 10 also includes a power supply circuit 42 that converts a commercial AC power source into a predetermined DC power source. The power supply circuit 42 always supplies power to the TV microcomputer 36 and also supplies power to each circuit other than the digital broadcast receiver 12 provided in the television receiver 10 via the switch circuit 44. The switch circuit 44 is turned on / off by the TV microcomputer 36, and when the main switch 46 provided in the main body of the television receiver 12 is turned off (main power is turned off), all the switches are turned off. The CS tuner 16 is supplied with power via the switch SW2. The switch SW2 is also turned on / off by the TV microcomputer 36. When the main power supply of the television receiver 10 is turned off, the intermittent mode is set. That is, the switch SW2 is turned on / off by the TV microcomputer 36 every 10 minutes, for example, and the power is intermittently supplied to the digital broadcast receiver 12. When the main power supply is on, the switch circuit 44 and the switch SW2 are turned on.
[0013]
However, when a predetermined mode such as a timer reservation mode, a new contract mode, or a paper-per-view (PPV) program purchase mode is set, the switch SW2 is switched according to these modes. Further, it can be set by referring to an EPG (Electric Program Guide), and when the setting is completed, mode information is given from the CS microcomputer 26 to the TV microcomputer 36.
[0014]
If the timer reservation mode is set and the reservation time is reached when the main power source is on, the CS channel of the reserved program is forcibly selected and the reserved program is output from the CRT 40. On the other hand, if the reservation time comes when the main power is off, the TV microcomputer 36 turns on the main power. That is, the switch circuit 44 and the switch SW2 are turned on. Then, the channel of the reserved program is selected by the CS tuner 16 by the CS microcomputer 26.
[0015]
When the new contract mode is set, the power of the digital broadcast receiver 12 is always turned on until the unlocking of the IC card of the CS tuner 16 is completed. In this embodiment, the period until the unlocking is completed is set to one week. When the unlocking of the IC card is completed, the CS microcomputer 26 notifies the TV microcomputer 36 of the key opening, and the TV microcomputer 36 cancels the new contract mode.
[0016]
When the PPV program purchase mode is set, the digital broadcast receiver 12 is turned on until the program purchase is completed. PPV refers to a contract method in which, for example, only a desired movie program for 2 hours can be viewed for a fee. Then, the information of the viewed PPV program is automatically transmitted to the customer management system via the telephone line at the end of the month and charged.
[0017]
When the intermittent mode is set, the switch SW2 is intermittently turned on / off so as not to miss a message or program information given from the broadcast station. In this embodiment, the switch SW2 is switched every 10 minutes, and the time of 10 minutes is measured by an intermittent timer 36a provided in the TV microcomputer 36. Messages, program information, and the like from the broadcast station are sent from the broadcast station at intervals of several tens of minutes to several hours, superimposed on the video when the next CS broadcast is viewed, and output from the CRT 40. As a message from the broadcaster, “I cannot purchase. Check the phone line connection.”, “I cannot send billing information. Check the phone line connection.” “Thank you for the contract. You can watch ".
[0018]
The TV microcomputer 36 processes the above operation according to the flowcharts shown in FIGS. As shown in FIG. 2, when the main power supply of the television receiver 10 is turned on, the processing is started. In step S1, the television receiver 10 determines whether or not the main power supply is off. Here, if " YES ", the process proceeds to step S55 shown in FIG. 5, but if " NO ", the intermittent timer 36a is turned off in step S3. In step S5, the switch SW2 is turned on to turn on the digital broadcast receiver 12. In step S7, it is determined whether or not the mode is the CS mode. If “NO”, the selected terrestrial broadcast channel is selected, and the process returns to step S1. If “YES”, the broadcast station is selected in step S9. Determine if a message from is received. Here, if “YES”, the message received in step S11 is displayed and the process proceeds to step S15. If “NO”, the process proceeds to step S15. In step S15, it is determined whether a channel selection operation has been performed. Here, if “YES”, the channel selection of the operated channel is instructed to the CS microcomputer 26 and the process proceeds to step S19. If “NO”, the process proceeds to step S19. In step S19, it is determined whether a new contract operation has been performed. Here, if “YES”, that is, if communication data of a new contract is given from the CS microcomputer 26, a new contract mode is set in the following step S21, and the process proceeds to step S23 shown in FIG. On the other hand, if “NO” in the step S19, the process proceeds to a step S23 as it is.
[0019]
As shown in FIG. 3, in step S23, it is determined whether or not an operation for purchasing a PPV program has been performed. Here, if “YES”, that is, if an instruction to purchase a PPV program is given from the CS microcomputer 26, the PPV purchase mode is set in step S25 and the process proceeds to step S27. If “NO”, step S27 is performed as it is. Proceed to In step S27, it is determined whether a program reservation operation has been executed. Here, if “YES”, that is, if a program reservation instruction is given from the CS microcomputer 26, the program reservation mode is set in step S29 and the process proceeds to step S31. If “NO”, the process proceeds to step S31 as it is. . In step S31, it is determined whether or not a new contract mode is set. If “NO”, the process proceeds to step S37. If “YES”, one week has elapsed since the new contract mode was set in step S33. Determine if you did. Here, if “YES”, the new contract mode is canceled in step S35 and the process proceeds to step S37. If “NO”, the process proceeds to step S37 as it is. In step S37, it is determined whether the PPV purchase mode is set. If “NO” here, the process proceeds to the step S43 shown in FIG. 4, but if “YES”, it is determined whether or not the PPV program purchase is notified in a step S39. If “NO”, the process proceeds to step S43. If “YES”, the PPV purchase mode is canceled in step S41, and the process proceeds to step S43.
[0020]
As shown in FIG. 4, in step S43, it is determined whether the program reservation mode is set. If “NO”, the process returns to the step S1. If “YES”, it is determined whether or not it is a broadcast start time in a step S45. Here, if “YES”, the reservation execution instruction is given to the CS tuner 26, and the process returns to step S1. If “NO”, it is determined in step S49 whether it is the broadcast end time. If “NO”, the process returns to the step S1. If “YES”, the CS tuner 16 is instructed to end in a step S51, the reservation mode is canceled in a step S53, and the process returns to the step S1.
[0021]
If “ YES ” in the step S1, that is, if the television receiver 10 is in the main power off state, as shown in FIG. 5, whether or not the new contract mode or the PPV purchase mode is set in the step S55. Judging. Here, if “YES”, the switch SW2 is turned on, that is, the power source of the digital broadcast receiver 12 is turned on, and the process proceeds to step S31 shown in FIG. 3. If “NO”, the program reservation is made in step S59. Determine whether the mode is set. If "NO", the process proceeds to step S65. If "YES", it is determined in step S61 whether it is a broadcast start time. Here, if “NO”, the process proceeds to step S65, but if “YES”, the main power source of the television receiver 10 is turned on in step S63, and the process proceeds to step S47 shown in FIG. In step S65, it is determined whether or not the intermittent timer 36a is off. If "YES" here, the intermittent timer 36a is turned on in step S67 and the process proceeds to step S69. If "NO", the process proceeds to step S69 as it is. In step S69, it is determined whether or not the intermittent timer 36a has expired. If “NO”, the process returns to the step S1. If “YES”, it is determined whether or not the switch SW2 is ON in a step S71. If "YES" here, the switch SW2 is turned off in step S73 and the process proceeds to step S77. If "NO", the switch SW2 is turned on in step S75 and the process proceeds to step S77. In step S77, the intermittent timer 36a is reset and the process returns to step S1.
[0022]
The video cassette tape recorder (VCR) 50 of another embodiment shown in FIG. 6 is provided with a recording / reproducing circuit 52 and a switch SW3 except for the video signal processing circuit 28 and the CRT 40 of the television receiver of the embodiment of FIG. Since the microcomputer 36 is the same except that it is changed to the system controller 54, the duplicated explanation is omitted. The syscon 54 performs the same processing as the microcomputer 36 in the embodiment of FIG.
[0023]
In the VCR 50, the composite video signal via the switch SW1 is recorded on a magnetic tape (not shown) by the recording / reproducing circuit 52. The recorded composite video signal is reproduced by the recording / reproducing circuit 52. The reproduction signal or the composite video signal via the switch SW1 is selected by the switch SW3, and one of the composite video signals is output from a monitor (not shown). However, the switch SW3 is turned on / off by the system controller 54.
[0024]
According to these embodiments, when the main power supply of the apparatus is in the off state, the digital broadcast receiver 12 is intermittently turned on / off, and the program reservation mode, the PPV purchase mode, or the new contract mode is set. Accordingly, since the power supply of the digital broadcast receiver 12 is continuously turned on, messages and program information from broadcast stations are not missed, and power consumption can be reduced.
[0025]
In this embodiment, the switch SW2 is turned on / off at the same interval, but the on or off period may be set to a different period.
In this embodiment, when the main power supply is turned off by the main switch 46 provided in the apparatus main body, the digital broadcast receiver 12 is turned on / off intermittently. Even when the power is turned off, the power of the digital broadcast receiver 12 is intermittently turned on / off.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a flowchart showing a part of processing of the TV microcomputer shown in FIG. 1 embodiment;
FIG. 3 is a flowchart showing a part of processing of the TV microcomputer shown in FIG. 1 embodiment;
4 is a flowchart showing a part of processing of the TV microcomputer shown in FIG. 1 embodiment; FIG.
FIG. 5 is a flowchart showing a part of processing of the TV microcomputer shown in FIG. 1 embodiment;
FIG. 6 is a block diagram showing another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Television receiver 12 ... Digital broadcast receiver 14 ... Terrestrial broadcast receiver 16 ... CS tuner 22 ... NTSC encoder 26 ... CS microcomputer 28 ... Terrestrial broadcast tuner 36 ... TV microcomputer 42 ... Power supply circuit 44 ... Switch circuit 46 ... Main switch 50 ... VCR
52 ... Recording / reproducing circuit 54 ... Syscon

Claims (4)

In a television signal receiver comprising a terrestrial broadcast receiver and a digital broadcast receiver,
First switch means for turning on / off power supply to the terrestrial broadcast receiver;
Second switch means for turning on / off the power supply to the digital broadcast receiver;
A microcomputer for determining on / off of a main power supply to control switching of the first switch means and the second switch means, and a supply means for constantly supplying power to the microcomputer;
The microcomputer turns on the first switch means and the second switch means when the main power supply is in the on state, and turns off the first switch means and turns off the second switch means when the main power supply is in the off state. A television signal receiving apparatus which is intermittently turned on / off. Before SL microcomputer, when the reservation mode to reserve digital broadcasting program is set, regardless of the off state of the main power supply is turned on at least the second switching means only broadcasting time of the digital broadcast program, according to claim 1 The television receiver as described. Before SL microcomputer, when the purchase mode to buy a digital broadcast program of the toll is set, regardless of the off state of the main power supply, program purchase is turned at least said second switching means until the end of claim 1 Or the television signal receiver of 2. Before SL microcomputer, when a new agreement mode is set to contract the viewing of digital broadcast channels of pay, regardless of the off state of the main power supply is turned on for a predetermined period at least said second switch means, claims 1 4. The television signal receiving device according to any one of 3 .

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