JP4596973B2 - Television receiver - Google Patents

Description

  The present invention relates to a television receiver having a serial bus interface, and more particularly to a television receiver that is channel-tuned and controlled by an external device connected to an IEEE 1394 serial bus or the like.

  Conventionally, for example, a digital video signal, a digital audio signal, or a control signal packet is obtained by connecting a digital STB, a digital television, or the like to a D-VHS video deck, an AV-HDD recorder, or the like via an IEEE 1394 serial bus. There is a system to send and receive.

  As an application technique of the system as described above, for example, an on-screen display (OSD) is used to control a digital television that remotely controls other devices by operating on the screen, or a digital STB. A D-VHS video deck that realizes a reserved recording operation is considered.

  In order to realize these functions, AV / C commands are used as means for controlling other devices. The AV / C command is a command set standardized by 1394 Trade Association for the purpose of remotely controlling a digital AV device connected to the IEEE 1394 serial bus from another device.

  In the AV / C command, a command (Unit Command) common to the device (unit) is defined by the AV / C General standard, and the power control command (POWER Control command) of the device body corresponds to this.

  Further, functions specific to the model are handled as subunits, and a control command (Subunit Command) is defined for each subunit. For example, a tuner subunit (Tuner Subunit) mounted on a digital STB defines a channel selection control command (SELECT Control command) for channel selection.

  Here, as an application technique of the above system, in a reservation recording function for recording a digital AV (Audio / Video) signal output from a digital STB (hereinafter referred to as STB) with a D-VHS video deck (hereinafter referred to as D-VHS). Regarding a technique when a user sets a reservation content on the D-VHS side and realizes a reserved recording operation by controlling the STB by the D-VHS (when the D-VHS is the control side and the STB is the controlled side) An example will be described below.

  When the user sets a recording reservation on the D-VHS side, the D-VHS enters a reservation standby state and waits until the current time reaches the user-specified recording start time. A little before the recording start time, the D-VHS sends a power control command [ON] of the AV / C command Subunit Command to the STB, turns on the internal power of the STB Tuner Subunit, and the STB turns on the digital AV. Enables signal output.

  Thereafter, a SELECT Control command of the AV / C command Subunit Command is transmitted to select the STB as a recording channel designated by the user. The STB on the controlled side only operates itself according to the control command from the D-VHS. When the recording start time comes, the D-VHS sets itself in the recording state and starts recording the digital AV signal output from the STB. The sequence up to here is the reservation recording start sequence.

Next, when the current time reaches the user-specified recording end time, the D-VHS stops itself and ends the recording of the digital AV signal output by the STB. Thereafter, a POWER Control command [OFF] of the AV / C command Tuner Subunit is transmitted to the STB, and the Tuner Subunit of the STB is returned to the power-off state before starting the reserved recording. Thus, like the techniques disclosed in Patent Documents 1 and 2, the STB stores the last channel selected by itself (hereinafter referred to as “last CH”) and is selected by external control. However, as described above, the STB operates itself according to the control by the AV / C command from the D-VHS to realize the reserved recording operation.
Japanese Utility Model Publication No. 5-5697 JP 2004-248140 A

  However, in the applied technology example described in the related art, the STB channel-controlled in the D-VHS reservation recording operation has the reserved channel as the last CH, and the user can turn on the power after the reservation recording operation. When this is done, the last CH, which is the channel that was reserved for recording, will be selected.

  In other words, in consideration of the fact that the scheduled recording function is often used as an answering machine in general, the scheduled recording function is almost always operated without the user being conscious, and is selected when the user turns on the power. There is a problem that the channel to be stationed is different from the channel when the power is turned off.

  Therefore, the present invention has been proposed in view of the above-described conventional problems, and even when channel selection control is performed from another device in a power-off state, the power is finally turned off when the user performs a power-on operation. An object of the present invention is to provide a television receiver that retunes to the last CH when operated and turns on the power, or a television receiver that clearly indicates to the user that the channel is controlled from an external device while the power is off. And

  In order to solve the above-described problems, a television receiver according to the present invention has the following configuration and has the following features.

Television receiver according to the present invention has an interface of a network system that performs a plurality of between the external devices and communication, which are connected by a bus, accepting an channel selection control from the external device via the bus a Te revision receiver, a storage unit for storing a channel that was last viewed when turned off power, and control means for performing tuning control channel, and OSD means for outputting a message to a user, With
The control means is the last channel stored in the storage means when the power is turned on in the case where the power is turned off after the channel selection control is performed from the other external device via the bus in the power off state. And the OSD means informs the user that the channel selection is controlled from the external device .

  As described above, according to the television receiver of the present invention, even if channel selection is controlled from an external device while the power is off, when the user turns on the power, the channel that is initially selected is selected. The channel is the same as the channel that was viewed before the power-off operation last time, and the user can view without a sense of incongruity.

  Further, according to the television receiver of the present invention, when the user performs a power-on operation, the user is informed that channel selection control has been performed from an external device while the power is off. This has the effect of providing the user with information that the channel is different from the channel when the power is turned on.

  Hereinafter, embodiments of a television receiver according to the present invention will be described with reference to the drawings.

<Description of Television Receiver According to First Embodiment of the Present Invention>
In the present embodiment, the television receiver according to the present invention will be described below using an STB as an example.

  In addition, a case where the external device that controls the STB is D-VHS will be described as an example.

  FIG. 1 is a system configuration diagram of the STB 11 and the D-VHS 12 connected to the IEEE 1394 serial bus 13.

  According to the figure, the STB 11 and the D-VHS 12 have IEEE 1394 interface units 115 and 122, respectively, and a partial transport stream (hereinafter referred to as a digital AV (Audio / Video) signal) via the IEEE 1394 serial bus 13. , A partial TS), and a device capable of transmitting and receiving AV / C commands.

  The D-VHS 12 includes a control unit 121 having a Tuner Subunit controller function for AV / C commands, and can control an external Tuner Unit target device.

  On the other hand, the STB 11 has a Tuner Subunit target function for AV / C commands, and is controlled by the D-VHS 12 that is a controller.

  In this embodiment, the D-VHS 12 generates an AV / C command and controls the STB 11 by the reserved recording function of the D-VHS 12. Then, the recording / playback unit 123 of the D-VHS 12 realizes the reserved recording operation by recording the partial TS output from the controlled STB 11.

  First, the reserved recording operation of D-VHS, which is an external device that controls the STB, will be described in advance using the flowchart shown in FIG.

  FIG. 2 is a flowchart showing the reserved recording operation of the D-VHS 12 serving as a controller.

  The basic control operation of the reserved recording operation of the D-VHS 12 is processed by the control unit 121.

  The user uses the remote control (not shown) provided in the D-VHS 12 to set the reservation of the D-VHS 12, and the reserved recording operation is performed after the internal clock of the D-VHS 12 reaches the reserved recording start time. Start.

  The D-VHS 12 transmits the POWER Control command [ON] of the AV / C command TunerSubunit Command to the target STB 11 (step S21), and turns on the internal power supply of the STB 11.

  Next, a SELECT Control command is transmitted to the target STB 11 (step S22), and the STB 11 selects the reception channel set by the user when the timer recording is set. After selecting the STB 11 and confirming that the partial TS of the channel is output from the STB 11, the recording operation is started (step S23). Then, the control unit 121 determines whether or not the reserved recording time has elapsed (step S24).

  After the reserved recording time set by the user has elapsed (step S24; YES), the recording operation is terminated (step S25).

  Finally, the D-VHS 12 transmits the POWER Control command [OFF] of the AV / C command Tuner Subunit Command to the STB 11 to turn off the internal power supply of the STB 11 (step S26). This completes the scheduled recording operation normally.

  Next, the operation when the STB 11 is channel-controlled by the D-VHS 12 will be described below with reference to the flowchart shown in FIG.

  FIG. 3 is a flowchart showing an operation when the STB 11 is subjected to channel selection control by the D-VHS 12.

  A basic operation when the STB 11 is subjected to channel selection control is processed by the control unit 114. This flowchart shows a specific operation of the television receiver according to the present invention, and the processing starts from the user's power-off operation.

  The STB 11 turns off its own power supply in accordance with the user's power-off operation (step S31). In general, this state is also called a power standby state. At this time, the STB 11 stores the “last channel” selected last (step S32).

  Even in the power-off state, the IEEE 1394 interface unit 115 of the STB 11 is energized, and even in this state, control is received from the D-VHS 12 via the IEEE 1394 bus 13. As a process of the reserved recording operation of the D-VHS 12 as a controller, the POWER Control command [ON] of the AV / C command Tuner Subunit Command is transmitted from the D-VHS 12, and the control unit 114 of the STB 11 that has received this command receives the Tuner Subunit. The power of the tuner unit 111, specifically, the tuner unit 111 and the DEMUX unit is turned on. In this state, since the power of the back end unit 113 is not turned on, it looks to the user the same as the normal power off state.

  Next, the SELECT control command of the AV / C command Tuner Subuni Command is transmitted by the D-VHS 12, and the control unit 114 of the STB 11 selects the reserved recording channel designated by the D-VHS 12, and performs the reserved recording. The channel partial TS is output from the IEEE 1394 interface unit 115.

  After the scheduled recording time elapses, the D-VHS 12 transmits the POWER Control command [OFF] of the AV / C command Tuner Subunit Command, the power of the Tuner Subunit of the STB 11 is turned off, and a series of scheduled recording operations is completed (step S33).

  Thereafter, when the user turns on the power (step S34), the STB 11 re-selects the last channel stored when the user turns off the power, and ends the process (step S35).

  With the above control, the channel selected when the user turns on the power becomes the same channel as the last channel that was viewed before the power was turned off last time, so that it does not give the user a sense of incongruity. is there.

<Description of Television Receiver According to Second Embodiment of the Present Invention>
The invention according to the present embodiment is similar to the first embodiment described above. When the user performs a power-on operation after the channel is controlled from an external device in the power-off state, the previous user turns off the power. Rather than re-selecting the channel that was viewed before the operation, it is determined that channel selection is controlled from an external device in the power-off state, and when the user performs power-on control, the display means such as the OSD function This notifies the user that channel selection has been controlled from an external device.

  FIG. 4 is a flowchart showing the operation when the target STB 11 is subjected to channel selection control from an external device.

  The processing shown in this flow is executed by the control unit 114 of the STB 11.

  First, it starts from the user's power-off operation. The STB 11 turns off its own power according to the user's power-off operation (step S41).

  As described in the first embodiment, as a process of the reserved recording operation of the D-VHS 12 serving as the controller, the D-VHS 21 transmits the POWER Control command [ON] of the AV / C command Tuner Subunit Command, and the STB 11 The power of the Tuner Subunit is turned on.

  Next, the SELECT control command of the AV / C command Tuner Subunit Command is transmitted by the D-VHS 12, and the STB 11 selects the tuner 111 as the reserved recording channel designated by the D-VHS 12, and the partial TS of the reserved recording channel. Is output from the IEEE 1394 interface unit 115.

  After the scheduled recording time elapses, the D-VHS 12 transmits the POWER Control command [OFF] of the AV / C command Tuner Subunit Command, the power of the Tuner Subunit of the STB 11 is turned off, and a series of scheduled recording operations are completed ( Step S42).

  Thereafter, when the user turns on the power (step S43), the control unit 114 determines whether or not the channel is selected by receiving the SELECT Control command from the external device, in this case, the D-VHS 12, while the power is off (step S44). ). If the channel is selected by receiving the SELECTControl command from the external device while the power is off (step S44; YES), the OSD displays a message that “the channel is controlled from the external device while the power is off”. The user is informed and the process is terminated (step S45). Note that if the SELECTControl command is not received from the external device while the power is off, the processing is terminated as it is (step S44; NO).

  FIG. 6 is a signal to the effect that channel selection control is performed for the user when the target device, which is channel-controlled from an external device in the power-off state, and the STB 11 in this embodiment is powered on by the user. It is the figure which showed an example.

  As shown in FIG. 6, a monitor screen 61 connected to or built in the STB 11 has a message box 62 displayed as an OSD. In this example, a message text “Selected from an external device during power-off” is displayed on the message box 62. As indicated by the content of this message, the user is signaled that channel selection has been controlled from an external device during power-off.

  Other signaling means include lighting or blinking the LED indicator mounted on the target device, and sounding the mounted buzzer device.

  With the above control, when the user performs a power-on operation, the last channel when the power was turned off last and the power-on operation are notified by notifying the user that channel selection has been controlled from an external device while the power is turned off. The user can be informed and recognized that the channel is different.

<Description of Television Receiver According to Third Embodiment of the Present Invention>
In the invention according to the first embodiment described above, when the user turns on the power, the channel is reselected to the last channel stored when the user turns off the power. If it is recognized that the channel selection control by the recording reservation operation is performed by the D-VHS 21, the reservation recording operation has failed if the channel is not controlled by the D-VHS 21 after the power-on operation. It may give you anxiety.

  The invention according to the present embodiment signals and confirms in advance to the user that the channel selection to the last channel at the time of the power-off operation after the power-on operation is performed.

  FIG. 5 is a flowchart showing the operation when the target STB 11 is subjected to channel selection control from an external device.

  The process shown in this flowchart is processed by the control unit 114 of the STB 11 and starts from a user power-off operation. The sequence up to the point where the user performs a power-on operation (step S54) is the same as that in the first embodiment, and the description is omitted here. When the user performs a power-on operation (step S54), it is determined whether a channel is selected by receiving a SELECT Control command from the external device, in this case, the D-VHS 12, while the power is off (step S55). If the channel is not selected from the external device, the process is terminated without doing anything. If the channel is selected by receiving a SELECT Control command from an external device while the power is off (step S55; YES), the OSD will “re-select to the last channel when the power is turned off?” A message is displayed (step S55; YES). The user is allowed to select whether or not to select again, and it is determined whether or not it has been selected (step S57). If the user requests that the channel be selected again (step S57; YES), the channel is reselected to the last channel recorded when the user turned off the power (step S58), and the process ends.

  FIG. 7 shows whether or not the STB 11, which is channel-controlled from an external device in the power-off state, re-tunes to the last channel recorded when the user performs the power-off operation. It is the figure which showed an example of the cue performed as a means for making it select.

  As shown in FIG. 7, a message screen 72 displayed as an OSD and virtual buttons 73 and 74 displayed on the message box 72 are displayed on a monitor screen 71 connected to or built in the STB 11. ing. In this example, the message text “Selected from an external device during power-off. Do you want to reselect the channel you were watching last?” Is displayed on the message box 62. As indicated by the content of this message, the user is made aware that channel selection control has been performed from an external device during power-off. A message “Yes” is displayed on the virtual button 73. When this button is selected, information for re-selecting the channel that was last viewed is transmitted to the control unit 114, and the last is displayed. The channel that was being watched on is re-selected. On the other hand, a message “No” is displayed on the virtual button 74. That is, when this button is selected, it is possible to allow the user to select a channel that has been subjected to channel selection control from an external device while the power is off, without reselecting the channel that was last viewed.

  With the above control, when the user performs a power-on operation, the user is informed that channel selection has been controlled from an external device while the power is off, and whether the channel is re-selected for the last channel when the power was last turned off. By selecting the user, it is possible to prevent the user from being confused even if the user recognizes that the channel selection is controlled from an external device while the power is off.

1 is a system configuration diagram of an STB 11 and a D-VHS 12 connected to an IEEE 1394 serial bus 13. FIG. It is a flowchart which shows the reservation video recording operation | movement of D-VHS12 used as a controller. It is a flowchart which shows operation | movement at the time of channel selection control of STB11 by D-VHS12. It is a flowchart which shows operation | movement at the time of channel selection control of STB11 used as a target from an external apparatus. It is a flowchart which shows operation | movement at the time of channel selection control of STB11 used as a target from an external apparatus. It is the figure which showed an example of the signal that the channel selection control performed with respect to a user was carried out when STB11 channel-controlled by the external apparatus in the power-off state was turned on by the user. When the STB 11 that is channel-controlled from an external device in the power-off state is turned on by the user, the user can select whether or not to select the last channel recorded when the user turns off the power. It is the figure which showed an example of this cue.

Explanation of symbols

11 Digital STB
12 D-VHS VCR 13 IEEE 1394 Serial Bus 14 Antenna 111 Tuner 112 DEMUX 113 Backend 114 Control Unit 115 IEEE 1394 Interface 121 Control Unit 122 IEEE 1394 Interface Unit 123 Recording / Playback Unit 61 Monitor Screen 62 Message Box 71 Monitor Screen 72 Message box 73 Virtual button 74 Virtual button

Claims (1)

An interface of a network system that performs a plurality of between the external devices and communication, which are connected by a bus, a ruthenate revision receiver receiving channel selection control from the external device via the bus,
Storage means for storing the channel that was last viewed when the power was turned off ;
Control means for performing channel selection control;
OSD means for outputting a message to the user;
With
The control means includes
When the power is turned off after channel selection is controlled from the other external device via the bus in the power off state, when the power is turned on, the last channel stored in the storage means is selected, A television receiver characterized in that the OSD means informs the user that channel selection has been controlled from the external device .

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