JP2005260330A - Broadcast receiver and broadcast receiving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for preventing the influence due to configuration of a plurality of CPUs when the plurality of CPUs are configured in a broadcast receiver and a control signal stored in a storage means is inputted from the outside and updated. <P>SOLUTION: This receiver is configured so as to be provided with a first control means for controlling a scaling means, a second control means for controlling the broadcast receiving means, and a switch means for switching and controlling the communication connection between the first and second control means on the basis of a control signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a broadcast receiving apparatus in which a control unit operates based on a control signal stored in a storage unit. The present invention also relates to a broadcast receiving apparatus that can rewrite a control signal stored in a storage means from outside.

  Currently, the broadcast receiving apparatus is being configured to operate a control means such as a CPU (microprocessor) based on a control signal stored in the storage means. In addition, there is a demand for an externally rewritable configuration in order to update the control signal stored in the storage means.

Patent Document 1 discloses a technique in which a microprocessor controls writing to storage means (memory) and prevents writing. However, in this patent document 1, a plurality of CPUs are configured in the broadcast receiving apparatus, and when the control signal stored in the storage means is inputted from the outside and updated, the influence of the plurality of CPUs is prevented. The technology to do was not disclosed.
JP-A-3-64960

  Therefore, the present invention has been made in view of the above circumstances, and a plurality of CPUs are configured in the broadcast receiving apparatus, and when a control signal stored in the storage means is input from the outside and updated, a plurality of CPUs are provided. It aims at providing the technique which prevents the influence by comprising.

  A broadcast receiving apparatus according to the present invention includes an external signal receiving unit that receives a control signal input from outside, a storage unit that stores a control signal received by the external signal receiving unit, and a broadcast receiving unit that receives a broadcast. Scaling means for performing scaling processing on the received broadcast and outputting; first control means for controlling the scaling means; second control means for controlling the broadcast receiving means; and the first control means. Communication means for connecting the second control means to each other by communication, and the communication means, and the communication connection between the first control means and the second control means is performed by the external signal receiving unit. And switch means for performing switch control based on the received control signal.

  The broadcast receiving method according to the present invention includes a step of receiving a control signal input from the outside, a step of storing the control signal received by the external signal receiving unit, a step of receiving a broadcast, and the received broadcast Performing a scaling process on the output, first control means for controlling the scaling step, second control means for controlling the broadcast receiving means, the first control means, and the second control A communication means for connecting means by communication, and the communication connection provided between the first control means and the second control means to the control signal received by the external signal receiving unit. And a step of performing switch control based on this.

  According to the configuration described above, a plurality of CPUs are configured in the broadcast receiving apparatus, and when the control signal stored in the storage unit is input from the outside and updated, the influence of the configuration of the plurality of CPUs is prevented. Technology can be provided.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows an embodiment of the present invention and is a schematic diagram showing a broadcast receiving apparatus.

  Reference numeral 1 is an antenna, reference numeral 2 is a tuner (broadcast receiving means), reference numeral 8 is a scaling unit (scaling means), reference numeral 9 is a display unit, reference numeral 10 is a broadcast receiving apparatus, reference numeral 100 is an IIC bus (communication means), reference numeral 101 Is a CPU 1 (first control means).

  A broadcast (terrestrial analog broadcast, BS digital broadcast, CS digital broadcast, terrestrial digital broadcast, etc.) transmitted from a broadcast station (not shown) is received by the antenna 1 connected to the broadcast receiving apparatus 10. The broadcast received by the antenna 1 is selected and received by the tuner 2 and a video signal is output. The tuner 2 is controlled by the CPU 2 (102). The video signal output from the tuner 2 is received by the scaling unit 8 and subjected to scaling processing, and the scaled video signal is output. The scaled video signal is displayed on the display unit 9. This scaling processing is necessary to display a video signal on a so-called FPD (flat panel display) such as an LCD (liquid color display) or a PDP (plasma display).

  The scaling unit 8 is controlled by the CPU 1 (101). Further, the CPU 2 (102) and the CPU 1 (101) are connected via the IIC bus 100 to perform video signal processing in the broadcast receiving apparatus 10 smoothly, and perform communication.

  FIG. 2 shows an embodiment of the present invention and is a diagram for explaining in detail the configuration of a broadcast receiving apparatus.

  Reference numeral 103 is a bus switch (switch means), reference numeral 104 is an EEPROM (storage means), reference numeral 105 is an EEPROM write connector (external signal receiving unit), reference numeral 106 is a constant power supply, reference numeral 107 is an operating power supply, reference numeral 109 is a power control line It is. The same components as those described above are denoted by the same reference numerals and description thereof is omitted.

  When the AC plug is inserted into the outlet, commercial power is always supplied to the power supply 106, and a predetermined power supply (VCC1) 108 is supplied to the CPU1 (101). The CPU 1 (101) controls the operating power supply 107 through the power supply control line 109. Although not particularly illustrated, the operating power supply 107 is controlled to be turned on and off by a remote controller. The operating power supply 107 supplies power (VCC2) to the CPU2 (102). As a result, the video signal is output to the display unit 9.

  The EEPROM 104 stores control signals (software such as programs) for controlling the CPU 1 (101) and CPU 2 (102). The EEPROM 104 is connected to an EEPROM write connector, and is configured to be able to rewrite a stored control signal by receiving a control signal from the outside and sending it to the EEPROM 104.

  As described above, the CPU 1 (101) and the CPU 2 (102) are connected by the IIC bus 100 and communicate with each other. A bus switch 103 is configured in the IIC bus 100, and is configured to perform a switch operation related to ON / OFF of the communication connection. Normally, the bus switch 103 is ON so that the CPU 1 (101) and the CPU 2 (102) can communicate with each other.

FIG. 3 shows an embodiment of the present invention and is a diagram for explaining the operation of the broadcast receiving apparatus in so-called service correspondence.

  The service response is a response that is performed by the service person to solve the problem when a problem occurs in the broadcast receiving apparatus 10. Here, the service person performs a process of rewriting the control signal stored in the EEPROM 104.

  A control signal (first signal) for updating the control signal stored in the EEPROM 104 from the outside via the EEPROM write connector 105, a control signal (second signal) for controlling the bus switch 103, and the CPU 2 (102) are reset ( A control signal (third signal) for high impedance control is input. Although not particularly illustrated, the EEPROM write connector 105 includes a terminal for receiving the control signals (first signal, second signal, and third signal).

  First, the AC input is always supplied to the power source 106, and both the constant power source 106 and the operating power source 107 are in an ON state. In this state, both CPU1 (101) and CPU2 (102) are operating.

  In this state, the EEPROM 104 is written. As described above, the EEPROM write connector 105 receives the control signals (first signal, second signal, and third signal). Then, an OFF signal (second signal) is sent to the bus switch 103, and a Reset signal (third signal) is sent to the CPU 2102. Then, CPU1 (101) and CP2 (102) are disconnected. Further, by setting the CPU 2 (102) to the high impedance state, it becomes possible to write the control signal to the EEPROM (104) without being affected by the CPU 1 (101) and the CPU 2 (102).

  FIG. 4 shows an embodiment of the present invention, and is a diagram for explaining the operation of the broadcast receiving apparatus in correspondence with the line.

  The line correspondence is a response to be performed in order to eliminate a defect in, for example, a factory production line when a problem occurs in the broadcast receiving apparatus 10. Here, the manufacturer performs a process of rewriting the control signal stored in the EEPROM 104.

  AC power is not supplied in the line correspondence here. For this reason, both the constant power supply 106 and the operating power supply 107 are OFF. Further, both CPU1 (101) and CPU2 (102) are not operating. In this state, the control signal stored in the EEPROM 104 is written (rewritten).

  Here, the EEPROM 104 and the CPU 2 (102) are a common power source. For this reason, the CPU 2 (102) is in an operating state. When the CPU 1 (101) is in the OFF state, when a control signal is written to the EEPROM 104 via the IIC bus 103, a current flows into the CPU 1 (101). For this reason, it is necessary to separate this. Therefore, an OFF signal (second signal) is sent from the outside to the bus switch 103 via the EEPROM write connector 105, and this is electrically disconnected. In addition, a reset signal (third signal) is sent to the CPU 2 (102) to set the high impedance state. As a result, it is possible to prevent a current from flowing into the CPU 1 (101) and to write a control signal (first signal) to the EEPROM 104.

  FIG. 5 shows an embodiment of the present invention, and is a diagram for explaining the operation of the broadcast receiving apparatus in response to a line.

In addition to the configuration shown in FIG. 4, the CPU 2 (102) is operated with two power supplies (VCC2 and VCC3). Here, VCC2 and VCC3 are different voltages. For example, VCC2 is 3.3V and VCC3 is 5V.
The VCC3 (5 V) is used as an ON / OFF signal (second signal) for the bus switch 103.

  With this configuration, a plurality of CPUs are configured in the broadcast receiving apparatus, and when the control signal stored in the storage means is input from the outside and updated, the influence of the configuration of the plurality of CPUs is affected. It becomes possible to prevent.

  Note that the present invention is not limited to the above-described embodiments as they are, and can be embodied by variously modifying the constituent elements without departing from the spirit in the implementation stage.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic which shows embodiment of this invention and shows a broadcast receiver. The figure which shows embodiment of this invention and is a figure explaining the structure of a broadcast receiver in detail. The figure which shows embodiment of this invention and is a figure explaining the operation | movement in the service response | compatibility of a broadcast receiver. The figure which shows embodiment of this invention and is a figure explaining the operation | movement in the line corresponding | compatible of a broadcast receiver. The figure which shows embodiment of this invention and is a figure explaining the operation | movement in the line corresponding | compatible of a broadcast receiver.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Antenna, 2 ... Tuner (broadcast receiving means), 8 ... Scaling part (scaling means), 9 ... Display part, 10 ... Broadcast receiving apparatus, 100 ... IIC bus (communication means), 101 ... CPU1 (1st control) Means), 102 ... CPU2 (second control means), 103 ... bus switch (switch means), 104 ... EEPROM (storage means), 105 ... EEROM write connector (external signal receiving section), 106 ... always power supply, 107 ... Operating power supply 109... Power control line.

Claims (9)

In the broadcast receiving apparatus in which the control means operates based on the control signal stored in the storage means,
An external signal receiving unit for receiving a control signal input from the outside;
Storage means for storing a control signal received by the external signal receiver;
Broadcast receiving means for receiving a broadcast;
A scaling means for performing a scaling process on the received broadcast and outputting it;
First control means for controlling the scaling means;
Second control means for controlling the broadcast receiving means;
Communication means for connecting the first control means and the second control means by communication;
A switching unit provided in the communication unit, and configured to switch-control a communication connection between the first control unit and the second control unit based on a control signal received by the external signal receiving unit; A broadcast receiver characterized by that. In the broadcast receiving apparatus in which the control means operates based on the control signal stored in the storage means,
An external signal receiving unit for receiving a control signal input from the outside;
Storage means for storing the first control signal received by the external signal receiver;
Broadcast receiving means for receiving a broadcast;
A scaling means for performing a scaling process on the received broadcast and outputting it;
First control means for controlling the scaling means;
Second control means for controlling the broadcast receiving means;
Communication means for connecting the first control means and the second control means by communication;
Switch means provided in the communication means, wherein the communication connection between the first control means and the second control means is switch-controlled based on a second control signal received by the external signal receiver. A broadcast receiving apparatus comprising: In the broadcast receiving apparatus in which the control means operates based on the control signal stored in the storage means,
An external signal receiving unit for receiving a control signal input from the outside;
Storage means for storing a control signal received by the external signal receiver;
Broadcast receiving means for receiving a broadcast;
A scaling means for performing a scaling process on the received broadcast and outputting it;
First control means for controlling the scaling means;
Second control means for controlling the broadcast receiving means;
Communication means for connecting the first control means and the second control means by communication;
A switching unit provided in the communication unit, and configured to switch-control a communication connection between the first control unit and the second control unit based on a control signal received by the external signal receiving unit; The second control unit controls the communication unit to be in a high impedance state based on a control signal received by the external signal receiving unit. In the broadcast receiving apparatus in which the control means operates based on the control signal stored in the storage means,
An external signal receiving unit for receiving a control signal input from the outside;
Storage means for storing the first control signal received by the external signal receiver;
Broadcast receiving means for receiving a broadcast;
A scaling means for performing a scaling process on the received broadcast and outputting it;
First control means for controlling the scaling means;
Second control means for controlling the broadcast receiving means;
Communication means for connecting the first control means and the second control means by communication;
Switch means provided in the communication means, wherein the communication connection between the first control means and the second control means is switch-controlled based on a second control signal received by the external signal receiver. And the second control unit controls the communication unit to be in a high impedance state based on a third control signal received by the external signal receiving unit. Receiving an externally input control signal;
Storing a control signal received by the external signal receiving unit;
Receiving a broadcast;
Performing a scaling process on the received broadcast and outputting it;
First control means for controlling the scaling step;
Second control means for controlling the broadcast receiving means;
Communication means for connecting the first control means and the second control means by communication;
A step of switch-controlling communication connection between the first control unit and the second control unit based on a control signal received by the external signal receiving unit provided in the communication unit; A broadcast receiving method characterized by the above. Receiving an externally input control signal;
Storing a first control signal received by the external signal receiver;
Receiving a broadcast;
Performing a scaling process on the received broadcast and outputting it;
First control means for controlling the scaling step;
Second control means for controlling the broadcast receiving means;
Communication means for connecting the first control means and the second control means by communication;
A switch control unit configured to switch the communication connection between the first control unit and the second control unit based on a second control signal received by the external signal receiving unit; A broadcast receiving method comprising: Receiving an externally input control signal;
Storing a control signal received by the external signal receiving unit;
Receiving a broadcast;
Performing a scaling process on the received broadcast and outputting it;
First control means for controlling the scaling step;
Second control means for controlling the broadcast receiving means;
Communication means for connecting the first control means and the second control means by communication;
A step of switch-controlling a communication connection between the first control unit and the second control unit, which is provided in the communication unit, based on a control signal received by the external signal receiving unit;
And a step of controlling the communication means to be in a high impedance state based on a control signal received by the external signal receiving unit. Receiving an externally input control signal;
Storing a first control signal received by the external signal receiver;
Receiving a broadcast;
Performing a scaling process on the received broadcast and outputting it;
First control means for controlling the scaling step;
Second control means for controlling the broadcast receiving means;
Communication means for connecting the first control means and the second control means by communication;
A switch control unit configured to switch the communication connection between the first control unit and the second control unit based on a second control signal received by the external signal receiving unit; ,
And a step of controlling the communication means to be in a high impedance state based on a third control signal received by the external signal receiver. In the broadcast receiving apparatus in which the control means operates based on the control signal stored in the storage means,
An external signal receiving unit for receiving a control signal input from the outside;
Storage means for storing the first control signal received by the external signal receiver;
Broadcast receiving means for receiving a broadcast;
A scaling means for performing a scaling process on the received broadcast and outputting it;
First control means for controlling the scaling means;
Second control means for controlling the broadcast receiving means;
Communication means for connecting the first control means and the second control means by communication;
A switching unit provided in the communication unit and configured to switch-control a communication connection between the first control unit and the second control unit based on a second control signal supplied from the inside; A broadcast receiving apparatus characterized by the above.

Images