JP2006295697A - Broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broadcast receiver capable of suppressing power consumption. <P>SOLUTION: The processing executed by a television receiver 100 that is one embodiment of the broadcast receiver includes a step S410 of measuring the time, when own devices are not in use; a step S440 of transmitting a command for limiting the supply of power to the devices to a power supply control circuit, when a predetermined time has elapsed (YES in S420) and a power-saving mode of the devices is valid (YES in S430); and a step S450 of executing operations of the devices at their power-saving mode. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a broadcast receiving apparatus capable of receiving an analog broadcast, and more specifically to a broadcast receiving apparatus further including a digital broadcast or other device.

As broadcast receiving apparatuses capable of receiving analog broadcasts, apparatuses having a digital broadcast receiving function are also provided in accordance with the start of digital broadcasting (see, for example, Patent Documents 1 to 4).
JP 2002-344832 A JP 2002-344831 A JP 2003-298777 A JP 2002-16854 A

  According to a device capable of receiving an analog broadcast and a digital broadcast, power consumption by a circuit for receiving a digital broadcast is increased as compared with a device having only an analog broadcast receiving circuit.

  In addition, broadcast receivers having complex functions are also widespread. Here, the composite function includes a function of receiving a television broadcast, a function of recording and reproducing video and audio, a function of printing a screen, a function of communicating information with other communication devices via a communication line, and other functions. Such a broadcast receiving apparatus also has a problem that power consumption increases due to the addition of functions.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a broadcast receiving apparatus capable of suppressing power consumption in a broadcast receiving apparatus having a plurality of functions. is there.

  Another object of the present invention is to provide a broadcast receiving apparatus capable of suppressing power consumption in accordance with a selected channel in a broadcast receiving apparatus capable of receiving analog broadcast and digital broadcast.

  In order to solve the above-described problems, according to one aspect of the present invention, a broadcast receiving apparatus includes a tuning unit that receives either analog broadcast or digital broadcast, and a channel selection unit that selects a channel that receives the broadcast. An input means for receiving a command input, a digital broadcast receiving means for receiving an input of a signal based on digital broadcasting from a tuning means, and an image signal for receiving an input of a signal based on an analog broadcast from the tuning means Analog broadcast receiving means for outputting, display means for displaying video based on video signals output from either the digital broadcast receiving means or the analog broadcast receiving means, and measuring time when the digital broadcast receiving means is not used Measuring means, power supply means for receiving power from the outside, and digital broadcast receiving means are not used for a predetermined time The first power supply control means for stopping the supply of power from the power supply means to the digital broadcast receiving means, the detection means for detecting the start of use of the digital broadcast receiving means based on the channel selection command, and the start of use And a second power supply control means for starting the supply of power from the power source to the digital broadcast receiving means based on the detection.

  According to another aspect of the present invention, a broadcast receiving apparatus includes a tuning unit that receives an analog broadcast, an analog broadcast receiving unit that receives an input of a signal based on the analog broadcast from the tuning unit, and a power source that receives an external power supply. Means, a driving means for executing a predetermined operation by receiving power supply, a detecting means for detecting that the driving means is not performing the operation, and driving based on the detection of the state Control means for controlling the operation of the means.

  Preferably, the tuning means receives analog broadcast and digital broadcast. The driving means includes digital broadcast receiving means for receiving a signal based on digital broadcasting from the tuning means and outputting a video signal.

  Preferably, the control means includes power supply control means for controlling supply of power from the power supply means to the drive means.

  Preferably, the power supply control unit stops supplying power.

  Preferably, the detection means detects a time when the drive means is not used. The control means controls the operation of the driving means when the driving means has not been used for a predetermined time.

  Preferably, the broadcast receiving apparatus further includes a detecting unit that detects the start of the operation of the driving unit. The control means includes power supply control means for controlling supply of electric power based on detection of the start of operation.

  Preferably, the tuning means receives analog broadcast and digital broadcast. The broadcast receiving apparatus further includes input means for receiving a channel selection command for selecting a channel for receiving the digital broadcast. The driving means includes digital broadcast receiving means for receiving a signal based on digital broadcasting from the tuning means and outputting a video signal. The detecting means detects the start of use of the digital broadcast receiving means based on the channel selection command.

  Preferably, the detection means includes a time detection means for detecting arrival of a time when the operation of the drive means starts.

  Preferably, the broadcast receiving apparatus further includes a storage unit that stores data representing a time at which the operation starts, and a measurement unit that measures the time. The time detection means detects the arrival of time based on the time and data measured by the measurement means.

  Preferably, the driving means includes video reproduction means for reproducing video.

  Preferably, the video reproduction means further includes video recording means for recording a video.

  Preferably, the video reproduction means includes a mounting means for receiving the recording medium and a reading means for reading a video signal stored in the recording medium attached to the mounting means.

  Preferably, the driving means includes communication means for inputting / outputting data by receiving a cable from the outside.

  According to the broadcast receiving apparatus according to the present invention, when the designated function is not used for a predetermined time, the power supply to the means for realizing the function is controlled. Can be suppressed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<First Embodiment>
With reference to FIG. 1, a television 100 according to a first embodiment of the present invention will be described. FIG. 1 is a block diagram illustrating a hardware configuration of a television 100 having a power saving function.

  The television 100 includes an antenna 102, a tuner 104, an external input unit 106, a remote control signal receiving unit 108, an operation panel 116, an analog broadcast receiving block 110, a display unit 150, a power unit 160, and a power control circuit. 162 and devices 180-1 and 180-2. The analog broadcast receiving block 110 includes a video signal processing circuit 112, a clock 114, a flash memory 200, and a CPU (Central Processing Unit) 300. The display unit 150 includes an OSD (On Screen Display) image generation circuit 152 and a display area 154. Device 180-1 includes a control circuit 190 and a drive unit 182.

  The antenna 102 receives radio waves of television broadcasting. The tuner 104 selects an analog broadcast channel for which channel selection is instructed based on the radio wave received by the antenna 102. The signal is input to the analog broadcast receiving block 110. The external input unit 106 receives a signal input from the outside of the television 100 and sends the input signal to the analog broadcast receiving block 110. The remote control signal receiving unit 108 receives the infrared signal emitted from the remote control terminal 194 and sends the signal to the analog broadcast reception block 110. The operation panel 116 includes a button (not shown), for example, and sends a signal corresponding to an operation by the viewer of the television 100 to the analog broadcast receiving block 110. This operation includes, for example, pressing a button for channel up tuning, pressing a button for down tuning, and the like.

  In the analog broadcast receiving block 110, the video signal processing circuit 112 receives a video signal from the tuner 104 or a video signal that is input via the external input unit 106. The video signal processing circuit 112 performs predetermined processing on these video signals and sends them to the display unit 150. The clock 114 sends time data of the analog broadcast receiving block 110 to the CPU 300. The flash memory 200 stores data for defining the operation of the analog broadcast receiving block 110. This data structure will be described later.

  CPU 300 executes a predetermined process based on time data from block 114, data stored in flash memory 200, and a signal from remote control signal receiver 108 or operation panel 116. The CPU 300 sends a control signal corresponding to the processing to the devices 180-1, 180-2, the tuner 104, or the OSD image generation circuit 152. Each element that receives the signal from the CPU 300 executes processing according to the signal.

  In the display unit 150, the video signal output from the analog broadcast receiving block 110 is combined with the signal output from the OSD image generation circuit 152 and sent to the display area 154. The OSD image generation circuit 152 generates an image signal to be displayed on the display area 154 based on a signal from the CPU 300. With this signal, the display area 154 can display the number of the currently received channel, the volume, and other information. The display area 154 is realized by, for example, a cathode ray tube, a liquid crystal display device, or other devices having a display function.

  The devices 180-1 and 180-2 are communication circuits for communicating with other video equipment via a system circuit for receiving digital broadcasts, a recording device for recording video signals, or a network (not shown). Including a device for realizing the above. The control circuit 190 outputs a command for causing the device 180-1 to perform a predetermined operation to the drive unit 182 based on a signal from the CPU 300. The drive unit 182 includes a motor for driving a recording medium, for example, when the device 180-1 is a recording apparatus. The drive unit 182 receives supply of power from the power supply unit 160 and performs an operation according to a signal from the control circuit 190. In this case, the electric power supplied to the drive unit 182 can be changed by control by the power supply control circuit 162, for example. This change is performed based on a signal from the CPU 300.

  The device 180-2 has the same configuration as the device 180-1, that is, a configuration that controls a drive unit (not shown) based on a signal from the CPU 300. In this embodiment, television 100 has two devices 180-1 and 180-2. However, television 100 may have only one device, or may have three or more devices. There may be. Further, the mode of the device is not limited to the above, and any device that can operate by receiving power supply from the power supply unit 160 may be used as long as the device is not used.

  With reference to FIG. 2, the data structure of television 100 according to the present embodiment will be described. FIG. 2 is a diagram conceptually showing one mode of data storage in flash memory 200.

  Flash memory 200 includes regions 210 and 220. Information for identifying a device (device ID (Identification)) is stored in area 210. Information indicating whether the power saving mode for the device is valid is stored in area 220. For example, for the device 180-1, the power saving mode is set to “valid”. Therefore, when the device 180-1 does not operate, the device 180-1 is switched to a predetermined power saving state as will be described later.

  On the other hand, the power saving mode of the device 180-2 is set to “invalid”. Therefore, the device 180-2 is maintained in the normal mode regardless of the state of the television 100. That is, the power supplied to the device 182 is not changed.

  Note that the mode for setting the presence / absence of the power saving mode is not limited to the above. For example, the setting may be changeable according to an external input by the viewer.

  With reference to FIG. 3, a configuration of CPU 300 provided in television 100 according to the present embodiment will be described. FIG. 3 is a block diagram showing functions realized by CPU 300.

  The CPU 300 includes an input / output unit 310 that communicates data with the outside of the CPU 300, an unused time measuring unit 320 that measures unused times of the devices 180-1 and 180-2, and an unused time measuring unit 320. Based on the result, a start determination unit 330 that determines whether to start switching to the power saving mode for the devices 180-1 and 180-2, and the device 180-1, Whether to switch the devices 180-1 and 180-2 from the power saving mode to the normal mode based on an input via the power supply control unit 340 that controls power supply to the 180-2 and the input / output unit 310 And a power supply command unit 3 for supplying power to the devices 180-1 and 180-2 based on the result of the return determination unit 350. 0 and a.

  The CPU 300 is realized by causing an arithmetic device to execute a program for realizing each of the above processes. Or each function may be implement | achieved by hardware like the combination of the circuit which implement | achieves each process instead of CPU300.

  A control structure of television 100 according to the present embodiment will be described with reference to FIG. FIG. 4 is a flowchart showing the procedure of the process performed when the television 100 shifts to the power saving mode.

  In step S410, CPU 310 of analog broadcast receiving block 110 measures the time during which devices 180-1 and 180-2 are not used. In step S420, CPU 300 determines whether or not a predetermined time has elapsed based on a signal from clock 114. If CPU 300 determines that the time has elapsed (YES in step S420), the process proceeds to step S430. If not (NO in step S420), the process returns to step S410.

  In step S430, CPU 300 determines whether or not the power saving mode of devices 180-1 and 180-2 is valid. This determination is made based on data stored in the flash memory 200, for example. If CPU 300 determines that the power saving mode of devices 180-1 and 180-2 is valid (YES in step S430), the process proceeds to step S440. If not (NO in step S430), the process ends.

  In step S440, CPU 300 sends to power supply control circuit 162 a command for limiting the supply of power to a device (for example, device 180-1) for which the power saving mode is determined to be valid. The power supply control circuit 162 restricts the supply of power from the power supply unit 160 to the drive unit 182 based on the command. For example, the supplied power is reduced to several tens of percent of the normal supply. For example, the voltage for device 180-1 is switched to a minimum voltage value or to 0 volts where possible.

  In step S450, device 180-1 performs an operation in the power saving mode. This execution is realized, for example, by the control circuit 190 executing a predetermined process based on a signal from the CPU 300.

  With reference to FIG. 5, the control structure of television 100 according to the present embodiment will be further described. FIG. 5 is a flowchart showing a procedure of processing executed to return to the normal mode when television 100 is in the power saving mode. When such processing is executed, the device that is in the power saving mode can execute normal operation.

  In step S510, CPU 300 detects the input of the control signal based on the signal from remote control signal receiver 108. In step S520, CPU 300 detects an instruction for using device 180-1 based on the control signal. In step S530, CPU 300 sends to power supply control circuit 162 a command to start supplying power to unused device 180-1. In response to the command, the power supply control circuit 162 starts supplying power to the device 180-1. In step S540, device 180-1 performs the operation in the normal mode. For example, a motor (not shown) built in the device 180-1 or a circuit (not shown) for processing a signal input to the device 180-1 enters a standby state and operates based on an operation command. It becomes possible.

  As described above, television 100 according to the present embodiment stores information on whether or not the power saving mode is valid for each of built-in devices 180-1 and 180-2 in flash memory 200 in advance. Yes. The CPU 300 restricts power supply to the device 180-1 or 180-2 based on the data and establishment of a preset condition. In this manner, when the devices 180-1 and 180-2 are not used, power supply to the devices is suppressed, so that power consumption of the television 100 can be suppressed.

<Second Embodiment>
The second embodiment of the present invention will be described below. Television 600 according to the present embodiment is different from the first embodiment described above in that it has a function of receiving a digital broadcast in addition to a function of receiving an analog broadcast. The same reference numerals are given to the same components as those in the above-described embodiment. The description thereof will not be repeated here.

  With reference to FIG. 6, TV 600 according to the present embodiment will be described. FIG. 6 is a block diagram illustrating a hardware configuration of television 600. The television 600 includes a digital broadcast receiving block 120 as one aspect of the devices 180-1 and 180-2 with respect to the configuration of the television 100 shown in FIG. The digital broadcast receiving block 120 includes a video signal processing circuit 122, a clock 124, a flash memory 400, a RAM 500, and a CPU 1100.

  The tuner 104 selects analog broadcasting and digital broadcasting. When the digital broadcast is selected, the digital broadcast signal is input to the video signal processing circuit 122 of the digital broadcast reception block 120. The video signal processing circuit 122 executes predetermined processing and sends the processed signal to a D / A (Digital to Analog) conversion circuit 130. The D / A conversion circuit 130 performs a predetermined conversion process on the signal to generate an analog signal, and sends the analog signal to the display unit 150.

  CPU 1100 receives an input from CPU 300 of analog broadcast receiving block 110 and an input of time information from clock 124. The CPU 1100 also writes data to and reads data from the flash memory 400 and temporarily stores data in a predetermined area of the RAM 500. When the CPU 1100 detects an instruction to receive a digital broadcast, the CPU 1100 sends a tuning instruction for receiving the broadcast to the tuner 104.

  Both the analog broadcast receiving block 110 and the digital broadcast receiving block 120 operate upon receiving power supply from the power supply unit 160. The power supply unit 160 can be limited in power supply by the power control circuit 160, for example. The control by the power supply control circuit 160 is realized based on a signal from the CPU 300 provided in the analog broadcast receiving block 110, for example.

  With reference to FIG. 7, a data structure of television 600 according to the present embodiment will be described. FIG. 7 is a diagram conceptually showing one mode of data storage in flash memory 200.

  Flash memory 200 includes regions 710-770. Information representing channels that can be received by television 600 is stored in areas 710 and 720. That is, the physical channel is stored in the area 710. Information indicating whether or not the channel is actually set as a channel selection target by the viewer is stored in area 720 as an ADD flag.

  Virtual channels associated with physical channels are stored in areas 730 and 740. Since the virtual channel is multiplexed and broadcast in the physical channel, one physical channel includes a plurality of virtual channels.

  A program for causing the tuner 104 to perform channel selection processing is stored in the area 750. Information for indicating a device included in television 600 and whether or not the device can execute the power saving mode is stored in regions 760 and 770. For example, regarding the first device, the power saving mode is set to “valid”. Regarding the second device, the power saving mode is set to “invalid”. Therefore, when a predetermined condition is satisfied, the first device can shift to a predetermined power saving mode. Here, the first device is, for example, the digital broadcast receiving block 120, but may be another device. The second device is, for example, the analog broadcast reception block 110, but may be other devices. Specifically, the CPU, the system control circuit, and other devices for controlling the operation of the television 600 are preferably set to the power saving mode disabled. In addition, a device used as necessary may have either a valid or invalid power saving mode.

  With reference to FIG. 8, CPU 300 according to the present embodiment will be described. FIG. 8 is a block diagram showing a functional configuration of CPU 300. CPU 300 includes an all-scan command detection unit 370, a channel selection command detection unit 372, a channel determination unit 374, a channel selection command unit 376, and a channel map update unit 378 in addition to the configuration shown in FIG. .

  All-scan command detection unit 370 acquires a command for detecting all channels that can be received by tuner 104 based on a signal from remote control signal reception unit 108 or operation panel 116. The channel selection command detection unit 372 detects a command to select a channel instructed to the tuner 104 by the viewer based on a signal input to the CPU 300. The channel determination unit 374 determines a channel to be selected by the tuner 104 based on the detection result by the channel selection command detection unit 372 and the data stored in the flash memory 200.

  The channel selection command unit 376 causes the tuner 104 to select a channel based on the determination result by the channel determination unit 374. When the channel determined by the channel determination unit 374 is a channel for receiving a digital broadcast, the channel selection command unit 376 selects a channel for receiving the digital broadcast from the CPU 1100 of the digital broadcast reception block 122. Instruct to tune in. The channel map update unit 378 updates information on channels that can be received by the television 600 based on the signal from the digital broadcast reception block 120.

  Next, the data structure of the digital broadcast receiving block 120 provided in the television 100 will be described with reference to FIGS. FIG. 9 is a diagram conceptually showing one mode of data storage in flash memory 400. FIG. 10 is a diagram conceptually showing one mode of data storage in RAM 500.

  As shown in FIG. 9, the flash memory 400 includes areas 410 to 460. The ADD flag is stored in the area 410. Information representing the physical channel is stored in area 420. In this case, when the ADD flag is “0”, it indicates that the physical channel corresponding to the flag is not selected by the viewer. On the other hand, when the ADD flag is “1”, it indicates that the physical channel corresponding to the flag is selected by the viewer. The area 430 stores information representing a virtual channel.

  In areas 440 to 460, subchannels included in the physical channel are stored. That is, when any subchannel is selected, data indicating that the subchannel is selected (for example, flag “1”) is stored in the area. On the other hand, when any sub-channel is not selected, a flag (for example, “0”) indicating that the channel is not selected is stored in the corresponding area.

  In the example shown in FIG. 9, for example, for the physical channel “10”, the first sub-channel is selected, and the other channels are not selected. On the other hand, for example, for the physical channel “11”, no subchannel is selected. In addition, the channel for broadcasting the digital broadcast may be changed as necessary, and in this case, for example, the configuration of the subchannel stored in the areas 440 to 460 is changed.

  Next, referring to FIG. 10, RAM 500 includes regions 510 to 530. The data shown in FIG. 10 is data sent from the digital broadcast receiving block 120 to the analog broadcast receiving block 110. That is, area 510 stores an ADD flag indicating whether or not a physical channel is selected. In the area 520, physical channels detected by the scanning operation by the digital broadcast receiving block 120 are stored. In the area 530, virtual channels associated with each physical channel are stored. As is clear from FIG. 10, subchannels that can be included in each physical channel are not stored in the RAM 500. In other words, the data transferred to the analog broadcast receiving block 110 has a smaller data amount than the data stored in the flash memory 400. Therefore, the load for data update is suppressed to the necessary minimum. In addition, the data update in the analog broadcast receiving block 110 is realized promptly.

  The CPU 1100 included in the digital broadcast receiving block 120 will be described with reference to FIG. FIG. 11 is a block diagram showing a functional configuration of CPU 1100.

  CPU 1100 includes an input / output unit 1110 for inputting / outputting signals to / from the outside, an all-scan command unit 1120 for outputting a command for selecting all channels for receiving digital broadcasts to tuner 104, A channel information acquisition unit 1130 that acquires information of a channel that is digitally broadcast from a radio wave received by the antenna 102, an update channel detection unit 1140 that detects an update of a channel that receives the digital broadcast, and an analog broadcast reception block 110 A channel information transmitting unit 1150 for transmitting information of a channel for receiving digital broadcasting, and a power saving mode operation control unit 1160 for switching the operation of the digital broadcasting receiving block 120 to the power saving mode.

  With reference to FIG. 12, a control structure of television 600 according to the present embodiment will be described. FIG. 12 is a flowchart showing a procedure of processing executed when television 600 shifts to the power saving mode.

  In step S1210, CPU 300 of analog broadcast reception block 110 detects that an analog broadcast reception channel has been selected based on an input of a remote control signal. Here, the remote control signal includes, for example, a signal output in response to pressing of a channel up channel selection button or a channel down channel selection button of the remote control terminal. Based on the detection, the CPU 300 selects a channel instructed to the tuner 104. The display unit 150 displays the video of the selected channel.

  In step S1220, CPU 300 determines whether or not the power saving mode of digital broadcast receiving block 120 is valid. This determination is made based on, for example, data stored in flash memory 200 (area 770 in FIG. 7). If CPU 300 determines that the power saving mode of digital broadcast receiving block 120 is valid (YES in step S1220), the process proceeds to step S1230. If not (NO in step S1220), the process ends.

  In step S1230, CPU 300 measures the time during which digital broadcast receiving block 120 is not used based on the time information from clock 114. In step S1240, CPU 300 determines whether or not the time exceeds a predetermined time. If CPU 300 determines that the time has exceeded a predetermined time (YES in step S1240), the process proceeds to step S1250. If not (NO in step S1240), the process returns to step S1230.

  In step S 1250, CPU 300 outputs a command to limit power supply to digital broadcast receiving block 120 to power supply control circuit 162. The power supply control circuit 162 restricts power supply from the power supply unit 160 to the digital broadcast receiving block 120 according to the command. For example, the supplied power is reduced to a preset ratio. In step S1260, CPU 300 outputs an image generation command representing the power saving mode to OSD image generation circuit 152. In step S1270, OSD image generation circuit 152 generates an image representing the power saving mode based on the command. A signal corresponding to the image is output to the display area 154. In step S1280, display unit 150 displays the image in display area 154. Thereby, the viewer of the television 600 can recognize that the television 600 has shifted to the power saving mode.

  With reference to FIG. 13, the control structure of television 600 according to the present embodiment will be further described. FIG. 13 is a flowchart showing a procedure of processes executed when television 600 switches from the power saving mode to the normal mode.

  In step S1310, CPU 300 detects an instruction to receive digital broadcast. In step S1320, CPU 300 determines whether the state of digital broadcast reception block 120 is the power saving mode or not. This determination is made based on data representing the state of the digital broadcast receiving block stored in flash memory 200, for example. In the data, for example, “1” is set as a corresponding flag when the digital broadcast receiving block 120 shifts to the power saving mode, and “0” is set when the digital broadcast receiving block 120 is not in the power saving mode. If CPU 300 determines that the state is the power saving mode (YES in step S1320), the process proceeds to step S1330. If not (NO in step S1320), the process proceeds to step S1340.

  In step S1330, CPU 300 sends to power supply control circuit 162 a command to set the power supply to digital broadcast receiving block 120 to a normal level. The power supply control circuit 162 returns the power supply from the power supply unit 160 to the digital broadcast receiving block 120 to a normal level in response to the command. In step S 1340, CPU 300 sends a digital broadcast reception command to CPU 1100 of digital broadcast reception block 120.

  In step S1350, CPU 1100 determines a channel to be received based on the reception command. This determination is made based on, for example, information sent from the CPU 300 and data stored in the flash memory 400 (FIG. 9). The CPU 1100 sends a command for selecting the determined channel to the tuner 104. When the tuner 104 selects a channel for receiving digital broadcasting based on the command, the digital broadcasting signal is input to the video signal processing circuit 122. After predetermined processing is performed on the signal, the digital broadcast video is displayed in the display area 154.

  Here, with reference to FIG. 14 and FIG. 15, the display mode of the screen in television 600 according to the present embodiment will be described. Screen (A) is a diagram showing a display mode of display unit 150 when television 600 is in the normal mode. Screen (B) is a diagram showing a display mode in the power saving mode.

  When the television 600 receives nine channels of analog broadcasting, the display unit 150 displays information “9ch” in the display area 154 (screen (A)). When this state continues for a while and the start of the power saving mode is instructed, the power supply to the digital broadcast receiving block 120 is restricted inside the television 600. In order to notify the shift to the power saving mode, for example, the display area 154 displays “EnergySave” (screen (B)). Thereby, the viewer of the television 600 can know that the television has shifted to the power saving mode while viewing the analog broadcast. Such a display may be automatically deleted in response to an operation of the remote control terminal 194 by the viewer after being displayed for a predetermined time, for example.

  Next, referring to FIG. 15, when television 600 receives an analog broadcast in the power saving mode, an image representing the mode (for example, “EnergySave”) is displayed on display unit 150 (screen ( A)). In this case, when the viewer selects a digital broadcast channel using the remote control terminal 194, the digital broadcast receiving block is switched from the power saving mode to the normal mode. That is, the analog broadcast receiving block 110 sends a command to select a digital broadcast channel to the digital broadcast receiving block 120 based on the channel selection command from the remote control terminal 194. Therefore, the CPU 300 of the analog broadcast receiving block 110 sends a power supply command to the power supply control circuit 162 before starting the operation so that the digital broadcast receiving block 120 can perform a normal operation.

  CPU 300 further sends to CPU 1100 a command to select a channel for receiving digital broadcasts in response to a remote control signal. When the CPU 1100 causes the tuner 104 to select the channel, the display unit 150 displays an image corresponding to the channel in the display area 154. At this time, for example, CPU 300 or CPU 1100 outputs an image display command to OSD image generation circuit 152 so as to indicate that the channel currently displayed is a digital broadcast channel. The display unit 150 displays the image generated according to the command in the display area 154 together with the video (screen (B)).

  As described above, television 600 according to the present embodiment stores information indicating whether or not the power saving mode is valid for each device designated in advance in flash memory 200. The CPU 300 of the analog broadcast receiving block 110 determines whether or not the operation of the digital broadcast receiving block 120 can be stopped while receiving the analog broadcast. When the CPU 300 determines that the stop is possible, the CPU 300 restricts the power supply from the power supply unit 160 to the digital broadcast receiving block. For example, the amount of electric power supplied is suppressed to a necessary minimum or completely cut off. In this way, since power supply to devices that are not used in the television 600 is suppressed, power consumption of the television 600 as a whole can be suppressed. In addition, since the television 600 displays an image indicating that effect in the display area 154 when shifting to the power saving mode or returning to the normal mode, the viewer of the television 600 can easily change the current mode of the television 600. Can be confirmed.

<Third Embodiment>
Hereinafter, a third embodiment of the present invention will be described. Television 1600 according to the present embodiment is different from the television according to each of the above-described embodiments in that it has a recording function in addition to a function of receiving an analog broadcast.

  A television 1600 according to the present embodiment will be described with reference to FIG. FIG. 16 is a block diagram illustrating a hardware configuration of television 1600. Television 1600 includes a hard disk recorder 1700 in addition to the configuration shown in FIG. The hard disk recorder 1700 includes an MPEG (Moving Picture Experts Group) encoder 1702, an HDD (Hard Disk Drive) device 1704, a CPU 1710, and an MPEG decoder 1706.

  The video signal output from the tuner 104 is input to the video signal processing circuit 112 and also to the MPEG encoder 1702. The MPEG encoder 1702 encodes the video signal by executing a predetermined process, and stores the data generated by the encoding in the HDD device 1704. This encoding process or storage process is controlled by the CPU 1710. CPU 1710 communicates control signals with CPU 300 of analog broadcast receiving block 110. The CPU 1710 causes the HDD device 1704 to execute a video / audio signal reading process based on a command from the CPU 300. A signal read from the HDD device 1704 is input to the MPEG decoder 1706. The MPEG decoder 1706 decompresses the data read based on a command from the CPU 1710 and sends the processed signal to the display unit 150.

  Note that the television 1600 according to the present embodiment includes the hard disk recorder 1700 as a device for recording video, but may include other devices. That is, the built-in device may be a device capable of recording or reproducing data upon receiving a detachable recording medium, or a flash memory, HDD or other recording medium is fixed. It may be a device. For example, the television 1600 may include a VTR (Video Tape Recorder), a DVD (Digital Versatile Disc) recorder, and other recording devices. When the apparatus receives the mounting of the recording medium, the supply of power may be started in response to the detection of the mounting. For example, the television 1600 may start supplying power to the DVD recorder in response to detection of an instruction to open a DVD tray. Accordingly, the television 1600 can promptly reproduce a DVD or record a program on the DVD quickly while suppressing power consumption.

  Alternatively, the television 1600 includes a device that operates by receiving power from the power supply unit 160 in order to communicate with a device having another communication function via a network (not shown) based on a predetermined communication standard. It may be.

  The CPU 1710 of the hard disk recorder 1700 will be described with reference to FIG. FIG. 17 is a block diagram showing a functional configuration of CPU 1710. CPU 1710 includes an input / output unit 1712, a write mode control unit 1714, an HDD write command unit 1716, an HDD read command unit 1718, and an operation control unit 1720.

  The input / output unit 1712 performs control signal communication with the CPU 300. The write mode control unit 1714 controls the compression rate of video data recorded on the MPEG encoder 1702. HDD write command unit 1716 outputs an instruction to record a video signal input to hard disk recorder 1700 in a predetermined area of HDD 1704 based on a write command from CPU 300. When such an instruction is output, the HDD device 1704 sequentially writes data in a data recording area of a hard disk (not shown) using a data recording / reproducing head (not shown). The HDD read command unit 1718 outputs a command to search and read data stored in the HDD device 1704 based on the playback command from the CPU 300. This reading is realized by the recording / reproducing head.

  When the video / audio data is read, the data is input to the MPEG decoder 1706. The operation control unit 1720 executes processing for shifting the hard disk recorder 1700 to the power saving mode based on a command from the CPU 300. For example, the operation control unit 1720 lowers the clock frequency at which the CPU 1710 operates by a predetermined ratio with respect to the frequency during normal operation. Note that the operation for the power saving mode by the operation control unit 1720 is not limited to the above.

  With reference to FIG. 18, a control structure of television 1600 according to the present embodiment will be described. FIG. 18 is a flowchart showing a procedure of processing realized by CPU 1710 when reserved recording is executed.

  In step S1810, CPU 300 obtains time information from clock 114. At step 1820, CPU 300 determines whether or not the current time is within a predetermined time from the start time of reserved recording. If CPU 300 determines that the current time is within a predetermined time from the start time (YES in step S1820), the process proceeds to step S1830. If not (NO in step S1820), the process returns to step S1820.

  In step S 1830, CPU 300 sends a command to start power supply to hard disk recorder 1700 to power supply control circuit 162. In response to this command, the power supply control circuit 162 returns the supply amount of power from the power supply unit 160 to the hard disk recorder 1700 to the normal supply amount. In step S1840, CPU 300 determines whether or not the scheduled recording start time has come. If CPU 300 determines that the start time has arrived (YES in S1840), the process proceeds to step S1850. If not (NO in step S1840), the process returns to step S1840 again.

  In step S1850, CPU 300 sends a command to start recording based on the reservation information to CPU 1710 of hard disk recorder 1700. When the CPU 1710 receives the command input, it instructs the HDD device 1704 to store the video signal from the MPEG encoder 1702 based on a preset recording mode. The HDD device 1704 drives a recording / reproducing head (not shown) based on the command to store the video signal in a predetermined disk area.

  As described above, television 1600 according to the present embodiment stores information on whether or not the power saving mode is valid for built-in hard disk recorder 1700 in flash memory 200. When a preset condition is satisfied, for example, when video data is not recorded or reproduced by hard disk recorder 1700, CPU 300 causes hard disk recorder 1700 to execute a power saving mode. That is, power supply from the power supply unit 160 to the hard disk recorder 1700 is suppressed. Alternatively, the operating frequency of the CPU 1710 is temporarily reduced. Thereby, the power consumption of the television 1600 is suppressed.

  When the power saving mode is realized in this manner, for example, when a trigger for operating the hard disk recorder 1700 occurs, the CPU 300 switches the hard disk recorder 1700 to the normal mode. Here, the trigger includes pressing of a recording button, arrival of a scheduled recording time, and the like. In this way, when the operation of the hard disk recorder 1700 is not required, the television 1600 can suppress the supply of power to the hard disk recorder 1700 and shift to an operable state. Therefore, it is possible to realize suppression of power consumption and quick start of the designated operation.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention is applicable to a broadcast receiving apparatus having a plurality of devices that operate by receiving power supply. For example, the present invention can be applied to a television receiver capable of receiving analog broadcasting and digital broadcasting, a television receiver having a VTR and other recording functions.

FIG. 2 is a block diagram showing a hardware configuration of television 100 according to the first embodiment of the present invention. FIG. 3 is a diagram conceptually showing one aspect of data storage in flash memory 200 provided in television 100 according to the first embodiment of the present invention. It is a block diagram showing the function which CPU300 with which the television 100 which concerns on the 1st Embodiment of this invention is provided is implement | achieved. 4 is a flowchart representing a procedure of processing executed by television 100 according to the first embodiment of the present invention when shifting to a power saving mode. 4 is a flowchart showing a procedure of processing executed by television 100 according to the first embodiment of the present invention to return from the power saving mode to the normal mode. It is a block diagram showing the hardware constitutions of the television 600 which concerns on the 2nd Embodiment of this invention. It is a figure which represents notionally the one aspect | mode of the data storage in the flash memory 200 with which the television 600 which concerns on the 2nd Embodiment of this invention is provided. It is a block diagram showing the functional structure of CPU300 which concerns on the 2nd Embodiment of this invention. It is a figure which represents notionally 1 aspect of the storage of the data in the flash memory 400 with which the television concerning the 2nd Embodiment of this invention is provided. It is a figure which represents notionally the one aspect | mode of the storage of data in RAM500 with which the television concerning the 2nd Embodiment of this invention is provided. It is a block diagram showing the functional structure of CPU1100 of the television which concerns on the 2nd Embodiment of this invention. It is a flowchart showing the procedure of the process performed when the television 600 which concerns on the 2nd Embodiment of this invention transfers to power saving mode. It is a flowchart showing the procedure of the process performed when the television 600 which concerns on the 2nd Embodiment of this invention switches from a power saving mode to a normal mode. It is FIG. (1) showing the display mode of the screen in the television 600 which concerns on the 2nd Embodiment of this invention. It is FIG. (2) showing the display mode of the screen in the television 600 which concerns on the 2nd Embodiment of this invention. It is a block diagram showing the hardware constitutions of the television 1600 which concerns on the 3rd Embodiment of this invention. FIG. 38 is a block diagram illustrating a functional configuration of a CPU 1710 of a hard disk recorder 1700 included in a television 1600. It is a flowchart showing the procedure of the process which CPU1710 of the television 1600 which concerns on the 3rd Embodiment of this invention implement | achieves.

Explanation of symbols

  100, 600, 1600 TV, 102 antenna, 104 tuner, 106 external input unit, 108 remote control signal receiving unit, 110 analog broadcast receiving block, 112, 122 video signal processing circuit, 114, 124 clock, 116 operation panel, 120 digital broadcasting Reception block, 130 D / A conversion circuit, 150 display unit, 152 OSD image generation circuit, 154 display area, 160 power supply unit, 162 power supply control circuit, 180-1, 180-2 device, 182 drive unit, 190 control circuit, 200, 400 Flash memory, 300, 1100, 1710 CPU, 500 RAM, 1700 Hard disk recorder, 1702 MPEG encoder, 1704 HDD, 1706 MPEG decoder.

Claims (14)

Channel selection means for receiving either analog broadcasting or digital broadcasting;
Input means for receiving an input of a channel selection command for selecting a channel for receiving the broadcast;
A digital broadcast receiving means for receiving a signal based on the digital broadcast and outputting a video signal from the channel selection means;
Analog broadcast receiving means for receiving a signal based on the analog broadcast and outputting a video signal from the channel selection means;
Display means for displaying video based on a video signal output from either the digital broadcast receiving means or the analog broadcast receiving means;
Measuring means for measuring the time when the digital broadcast receiving means is not used;
Power supply means for receiving power supply from outside;
First power supply control means for stopping the supply of power from the power supply means to the digital broadcast receiving means when the digital broadcast receiving means has not been used for a predetermined time;
Detection means for detecting the start of use of the digital broadcast receiving means based on the channel selection instruction;
A broadcast receiving apparatus comprising: a second power supply control unit that starts supplying power from the power source to the digital broadcast receiving unit based on detection of the start of use. Channel selection means for receiving analog broadcasting,
Analog broadcast receiving means for receiving an input of a signal based on the analog broadcast from the channel selection means,
Power supply means for receiving power supply from outside;
Drive means for performing a predetermined operation by receiving the supply of electric power;
Detecting means for detecting that the driving means is not performing the operation;
A broadcast receiving apparatus comprising: control means for controlling the operation of the driving means based on the detection of the state. The channel selection means receives analog broadcasting and digital broadcasting,
The broadcast receiving apparatus according to claim 2, wherein the driving unit includes a digital broadcast receiving unit that receives a signal based on the digital broadcast from the channel selection unit and outputs a video signal.   The broadcast receiving apparatus according to claim 2, wherein the control means includes power supply control means for controlling supply of power from the power supply means to the drive means.   The broadcast receiving apparatus according to claim 4, wherein the power control unit stops the supply of the power. The detecting means detects a time when the driving means is not used,
The broadcast receiving apparatus according to claim 2, wherein the control means controls the operation of the drive means when the drive means has not been used for a predetermined time. Further comprising detection means for detecting the start of operation of the drive means;
The broadcast receiving apparatus according to claim 2, wherein the control means includes power supply control means for controlling supply of the power based on detection of the start of the operation. The channel selection means receives analog broadcasting and digital broadcasting,
The broadcast receiving apparatus further comprises an input means for receiving a channel selection command for selecting a channel for receiving the digital broadcast,
The driving means includes a digital broadcast receiving means for receiving a signal based on the digital broadcast from the channel selection means and outputting a video signal,
The broadcast receiving apparatus according to claim 7, wherein the detection unit detects the start of use of the digital broadcast reception unit based on the channel selection command.   The broadcast receiving apparatus according to claim 7, wherein the detection unit includes a time detection unit that detects arrival of a time at which the operation of the driving unit starts. Storage means for storing data representing the time at which the operation starts;
A measuring means for measuring time,
The broadcast receiving apparatus according to claim 9, wherein the time detection unit detects the arrival of the time based on the time measured by the measurement unit and the data.   The broadcast receiving apparatus according to claim 2, wherein the driving unit includes a video playback unit that plays back a video.   12. The broadcast receiving apparatus according to claim 11, wherein the video reproduction means further includes video recording means for recording a video. The video reproduction means includes
A mounting means for receiving a recording medium;
The broadcast receiving apparatus according to claim 12, further comprising: a reading unit that reads a video signal stored in a recording medium mounted on the mounting unit.   The broadcast receiving apparatus according to claim 2, wherein the driving unit includes a communication unit that inputs and outputs data by receiving a cable attached from the outside.

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