JP4549986B2 - Digital broadcast receiver and digital broadcast receiving method - Google Patents

Description

The present invention is a digital broadcast receiver for receiving digital broadcast and a digital broadcast receiving method.

With the start of digital television broadcasting, not only home-use digital television broadcast receivers but also in-vehicle digital television broadcast receivers are used (see, for example, Patent Documents 1 to 4).
Japanese Patent Laid-Open No. 11-136589 JP 2001-309254 A JP 2005-244530 A JP-A-2005-244531

  Unlike a home-use digital television broadcast receiver, an in-vehicle digital television broadcast receiver requires a mechanism that prevents a user from performing complicated operations while traveling. In-vehicle digital television broadcast receivers are designed not to display video and characters while traveling. For this reason, improvement in operability is required.

The present invention has been made to solve the above-described conventional problems, and provides a digital broadcast receiver and a digital broadcast receiving method with improved operability.

The digital broadcast receiver according to the present invention stores a receiving means for receiving a digital broadcast signal that requires descrambling , and descrambling information for descrambling when the receiving intensity of the receiving means is a predetermined value or less. A test unit for testing the storage medium, and a control unit for displaying a test result of the storage medium performed by the test unit on a display unit. When an error is detected, the receiving unit receives a broadcast signal other than the digital broadcast signal that needs to be unscrambled, and notifies the management center of an abnormality to notify the management center of the abnormality of the storage medium. If the storage medium is notified of an abnormality and no error is detected in the storage medium by the test means, the display means It is characterized by performing a display indicating that the receiving sensitivity is deteriorated.

According to this configuration, when the reception intensity of the receiving unit is equal to or lower than a predetermined value, the storage medium storing the descrambling information for descrambling is tested, and an error of the storage medium is detected. Can notify the management center of the abnormality of the storage medium in response to an instruction to notify the abnormality of the storage medium. Further, when an error in the storage medium is detected, the user can view a broadcast signal other than digital broadcast that requires descrambling. Furthermore, when no error in the storage medium is detected, the user can be notified of the cause of the deterioration of the reception state by displaying on the display means that the reception sensitivity of the reception means has deteriorated. it can.

The digital broadcast receiving method of the present invention is a digital broadcast receiving method of a digital broadcast receiver, the step of receiving a digital broadcast signal that requires descrambling by the receiving means, and the reception intensity of the receiving means is below a predetermined value. A test of a storage medium storing descrambling information for descrambling, a step of displaying a test result of the storage medium on a display means, and a test of the storage medium by the test of the storage medium. When an error is detected, the receiving unit receives a broadcast signal other than the digital broadcast signal that needs to be unscrambled, and notifies the management center of an abnormality to notify the management center of the abnormality of the storage medium. Notifying the abnormality of the storage medium, and detecting the storage medium error by testing the storage medium. If it is not, on the display unit, and a step of displaying an indication that reception sensitivity is deteriorated.

According to the present invention, if the user is unable to view digital broadcasting requiring descrambling, for switching the reproduction of content other than other broadcast and broadcast, if the viewing of digital broadcast requiring descrambling is impossible In addition, a complicated operation by the user is not necessary, and the operability is improved.

  Hereinafter, a digital television broadcast receiver according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of a digital television broadcast receiver. A digital television broadcast receiver 100 shown in FIG. 1 has a function of selectively receiving a digital television broadcast that requires descrambling and other broadcasts, and a function of reproducing content stored on a medium such as a CD or a DVD.

  The digital television broadcast receiver 100 includes an antenna 10 that receives a broadcast signal, a processing unit 20, a speaker 50, a display 60, and an operation unit 62. Among these, the processing unit 20 includes a CPU 22, an input / output unit 24, a RAM 26, a ROM 28, an IC chip 30, a card slot 32, a communication unit 34, a tuner 36, a demodulation unit 38, a TS decoder 40, an audio connected to the bus 21. A decoder 42, an image decoder 44, and a display processing unit 46 are included.

  The CPU 22 performs various processes for controlling the entire processing unit 20 using programs and information stored in the RAM 26 and the ROM 28. The input / output unit 24 receives an instruction corresponding to the operation of the operation unit 62 by the user. The IC chip 30 stores descrambling information for descrambling digital TV broadcasts that require descrambling. The card slot 32 is loaded with the IC card 200 in which the descrambling information is stored. The processing unit 20 only needs to have at least one of the IC chip 30 and the card slot 32. The communication unit 34 communicates with a card center that manages descrambling information via a communication network such as the Internet.

  The tuner 36 performs processing for extracting a target broadcast signal from the broadcast signal received by the antenna 10. The demodulator 38 demodulates the signal extracted by the tuner 36. The TS decoder 40 performs a process of descrambling the demodulated signal based on the descrambling information stored in the IC chip 30 or the card slot 32. The audio decoder 42 decodes the output signal of the TS decoder 40, extracts the audio signal, and outputs it to the speaker 50. The image decoder 44 decodes the output signal of the TS decoder 40 and extracts an image signal. The display processing unit 46 performs processing necessary for image display on the display 60 based on the image signal from the image decoder 44.

  Hereinafter, the first to seventh embodiments of the operation of the digital television broadcast receiver 100 will be described with reference to the flowchart. In the following, it is assumed that the digital television broadcast receiver 100 is initially receiving a digital television broadcast that requires descrambling.

(First embodiment)
FIG. 2 is a flowchart showing the operation of the digital television broadcast receiver 100 in the first embodiment. The CPU 22 in the processing unit 20 tests the IC card 200 inserted in the card slot 32 at a predetermined timing, for example, when the power of the digital television broadcast receiver 100 is turned on (S101). FIG. 3 is a diagram showing an example of contents of an IC card test and an example of contents of errors of the IC card 200 in the IC card test. The test contents are the mounting state of the IC card 200 in the card slot 32, the communication state with the IC card 200, the availability of the IC card 200, the contract state of the IC card 200, and the error content is in the test of the mounting state. Not installed, communication error in communication status test, unavailable in usage test, non-contracted, out of contract, contract expiration, and viewing restrictions in contract status test.

  After the IC card test, the CPU 22 outputs the result to the display processing unit 46 and instructs the display of the test result image. In response to this instruction, the display processing unit 46 generates an image of the test result and displays it on the display 60 (S102).

  Next, the CPU 22 determines whether or not the result of the IC card test is good (S103). When the result of the IC card test is good, a series of operations is completed. On the other hand, when the result of the IC card test is not good, in other words, when an error of the IC card 200 is detected, the CPU 22 detects the digital broadcast signal that requires the descrambling from the broadcast signal received by the antenna 10. Control is performed so as to extract other digital TV broadcast signals (other digital TV broadcast signals). Thereby, the broadcast received by the digital television broadcast receiver 100 is switched from the digital television broadcast that requires descrambling to another digital television broadcast (S104).

(Second embodiment)
FIG. 4 is a flowchart showing the operation of the digital television broadcast receiver 100 in the second embodiment, and FIG. 5 is a diagram showing an example of an image displayed on the display 60 in the second embodiment.

  The CPU 22 in the processing unit 20 determines whether or not the user has instructed the test of the IC card 200 (S201). Specifically, when a digital television broadcast requiring descrambling is received and the image (FIG. 5A) is displayed on the display 60, the user operates the operation unit 62 to display the menu image. The CPU 22 inputs a signal corresponding to the instruction via the input / output unit 24. Then, the CPU 22 instructs the display processing unit 46 to display a menu image in response to the user's instruction. In response to this instruction, the display processing unit 46 generates the menu image shown in FIG. When the user touches the display area 201 of “IC card test” in the menu image displayed on the display 60, a signal to that effect is input to the CPU 22 via the input / output unit 24. When the CPU 22 inputs a signal indicating that the display area 201 has been touched, the CPU 22 determines that the test of the IC card 200 has been instructed.

  When the user gives an instruction to test the IC card 200, thereafter, in S202 to S205, operations similar to S101 to S104 in the flowchart shown in FIG. 2 are performed.

(Third embodiment)
FIG. 6 is a flowchart showing the operation of the digital television broadcast receiver 100 in the third embodiment, and FIGS. 7 and 8 are diagrams showing examples of images displayed on the display 60 in the third embodiment.

  The CPU 22 in the processing unit 20 confirms the reception state of the digital television broadcast that requires descrambling (S301). Specifically, the CPU 22 detects the reception intensity of the digital television broadcast signal that needs to be descrambled and taken out by the tuner 36.

  Next, the CPU 22 determines whether or not the reception quality of the digital television broadcast that requires descrambling is good (S302). The CPU 22 determines that the reception strength of the digital television broadcast signal that needs to be descrambled extracted by the tuner 36 exceeds a predetermined value, and determines that it is not good when the received intensity is less than the predetermined value. To do.

  If the reception quality is good, the series of operations is completed. On the other hand, if the reception quality is not good, the CPU 22 tests the IC card 200 inserted in the card slot 32 (S303). Further, the CPU 22 outputs the result of the IC card test to the display processing unit 46 and instructs the image display of the test result. In response to this instruction, the display processing unit 46 generates an image of the test result and displays it on the display 60 (S304).

  Next, the CPU 22 determines whether or not the result of the IC card test is good (S305). When the result of the IC card test is good, the CPU 22 instructs the display processing unit 46 to display an image for notifying the deterioration of the reception quality. In response to this instruction, the display processing unit 46 superimposes an image for notifying deterioration of reception quality, for example, a mark 202 indicating reception quality shown in FIG. 7A on an image of a digital television broadcast that requires descrambling. 7B or the image shown in FIG. 7B is generated and displayed on the display 60 (S306).

  On the other hand, when the result of the IC card test is not good, in other words, when an error of the IC card 200 is detected, the CPU 22 detects another digital television broadcast signal from the broadcast signal received by the antenna 10 by the tuner 36. Control to take out. Thereby, the broadcast received by the digital television broadcast receiver 100 is switched from the digital television broadcast requiring descrambling to another digital television broadcast (S307).

  Next, the CPU 22 determines whether an error notification of the IC card 200 to the card center is instructed by the user (S308). Specifically, the CPU 22 instructs the display processing unit 46 to display the selected image for error notification. In response to this instruction, the display processing unit 46 generates a selection image for error notification shown in FIG. When the user touches the “Yes” display area 203 or the “No” display area 204 in the error notification selection image displayed on the display 60, a signal to that effect is input to the CPU 22 via the input / output unit 24. The The CPU 22 determines that an error notification has been instructed when a signal indicating that the display area 203 has been touched is input. If the CPU 22 inputs a signal indicating that the display area 204 has been touched, the error notification is not instructed. It is determined that

  If no error notification has been instructed, the series of operations ends. On the other hand, when an error notification is instructed, the CPU 22 outputs error content information to the communication unit 34 and instructs the card center to be notified. In response to this instruction, the communication unit 34 notifies the card center of information on the error content (S309).

(Fourth embodiment)
In this embodiment, whether or not to automatically perform an IC card test is set in advance. FIG. 8 is a diagram illustrating an example of an image in automatic setting of an IC card test. When the user operates the operation unit 62 to instruct display of the menu image, the CPU 22 in the processing unit 20 inputs a signal corresponding to the instruction via the input / output unit 24. Then, the CPU 22 instructs the display processing unit 46 to display a menu image in response to the user's instruction. In response to this instruction, the display processing unit 46 generates the menu image shown in FIG.

  When the user touches the “other setting” display area 205 in the menu image displayed on the display 60, a signal to that effect is input to the CPU 22 via the input / output unit 24. When the CPU 22 inputs a signal indicating that the display area 205 is touched, the CPU 22 instructs the display processing unit 46 to display the setting image. In response to this instruction, the display processing unit 46 generates a setting image shown in FIG. 8B and displays it on the display 60. When the user touches the “ON” display area 206 or “OFF” display area 207 of the automatic test in the setting image displayed on the display 60, a signal to that effect is input to the CPU 22 via the input / output unit 24. The When the CPU 22 inputs a signal indicating that the display area 206 is touched, the CPU 22 stores setting information indicating that the IC card test is automatically performed in the RAM 26. When the CPU 22 inputs a signal indicating that the display area 207 is touched, the IC 22 Setting information indicating that the card test is not automatically performed is stored in the RAM 26.

  FIG. 9 is a flowchart showing the operation of the digital television broadcast receiver 100 in the fourth embodiment. The operations in S401 and S402 are the same as the operations in S301 and S302 in the flowchart shown in FIG.

  When it is determined in S402 that the reception quality is not good, the CPU 22 determines whether or not the setting for automatically performing the IC card test is made (S403). Specifically, when the setting information for automatically performing the IC card test is stored in the RAM 26, the CPU 22 determines that the setting for automatically performing the IC card test is made, If setting information indicating that the IC card test is not automatically performed is stored, it is determined that the setting indicating that the IC card test is not automatically performed is made.

  If the setting is made not to automatically perform the IC card test, the series of operations ends. On the other hand, if the setting to automatically perform the IC card test is made, thereafter, the same operations as S303 to S309 in the flowchart shown in FIG. 6 are performed in S404 to S410.

(5th Example)
In the present embodiment, it is set in advance whether or not an error notification to the card center is automatically performed when the IC card test is not good. FIG. 10 is a diagram illustrating an example of an image in error notification automatic setting. When the user operates the operation unit 62 to instruct display of the menu image, the CPU 22 in the processing unit 20 inputs a signal corresponding to the instruction via the input / output unit 24. Then, the CPU 22 instructs the display processing unit 46 to display a menu image in response to the user's instruction. In response to this instruction, the display processing unit 46 generates the menu image shown in FIG.

  When the user touches the “other setting” display area 205 in the menu image displayed on the display 60, a signal to that effect is input to the CPU 22 via the input / output unit 24. When the CPU 22 inputs a signal indicating that the display area 205 is touched, the CPU 22 instructs the display processing unit 46 to display the setting image. In response to this instruction, the display processing unit 46 generates a setting image shown in FIG. When the user touches the “ON” display area 208 or “OFF” display area 209 of the card error notification in the setting image displayed on the display 60, a signal to that effect is sent to the CPU 22 via the input / output unit 24. Entered. When the CPU 22 inputs a signal indicating that the display area 208 is touched, the CPU 22 stores setting information indicating that an error notification in the IC card test is automatically performed in the RAM 26 and inputs a signal indicating that the display area 209 is touched. In this case, setting information indicating that error notification in the IC card test is not automatically performed is stored in the RAM 26.

  FIG. 11 is a flowchart showing the operation of the digital television broadcast receiver 100 in the fifth embodiment. The operations in S501 through S508 are the same as the operations in S401 through S408 in the flowchart shown in FIG.

  After switching from reception of the digital TV broadcast requiring descrambling to reception of another digital TV broadcast in S508, the CPU 22 determines whether or not an error notification in the IC card test is automatically performed. Is determined (S509). Specifically, when the setting information for automatically performing error notification in the IC card test is stored in the RAM 26, the CPU 22 determines that the setting for automatically performing error notification is made. If the setting information indicating that the error notification in the IC card test is not automatically performed is stored, it is determined that the setting that the error notification is not automatically performed is made.

  If the setting has been made not to automatically perform error notification in the IC card test, the series of operations ends. On the other hand, when an error notification in the IC card test is set to be automatically performed, the CPU 22 outputs information on the error content to the communication unit 34 and instructs the card center to notify the error. . In response to this instruction, the communication unit 34 notifies the card center of error content information (S510).

(Sixth embodiment)
FIG. 12 is a flowchart showing the operation of the digital television broadcast receiver 100 in the sixth embodiment, and FIG. 13 is a diagram showing an example of an image displayed on the display 60 in the third embodiment. The operations in S601 through S607 in the flowchart shown in FIG. 12 are the same as the operations in S501 through S507 in the flowchart shown in FIG.

  When it is determined in S606 that the result of the IC card test is not good, in other words, when an error of the IC card 200 is detected, the CPU 22 determines whether or not the user has instructed switching of the received broadcast (S608). ). Specifically, the CPU 22 instructs the display processing unit 46 to display a selection image for switching the received broadcast. In response to this instruction, the display processing unit 46 generates a selection image for switching the received broadcast shown in FIG. When the user touches the “Yes” display area 210 or the “No” display area 211 in the received broadcast switching selection image displayed on the display 60, a signal to that effect is sent to the CPU 22 via the input / output unit 24. Entered. When the CPU 22 inputs a signal indicating that the display area 210 is touched, the CPU 22 determines that switching of the received broadcast is instructed. When the CPU 22 inputs a signal indicating that the display area 211 is touched, the CPU 22 switches the received broadcast. Is determined not to be instructed.

  When receiving broadcast switching is instructed, the CPU 22 controls the tuner 36 to extract another digital television broadcast signal from the broadcast signal received by the antenna 10. Thereby, the broadcast received by the digital television broadcast receiver 100 is switched from the digital television broadcast requiring descrambling to another digital television broadcast (S609). On the other hand, when switching of the received broadcast is not instructed, the operation of S609 is not performed. Thereafter, in S610 and S611, operations similar to S509 and S510 in the flowchart shown in FIG. 11 are performed.

(Seventh embodiment)
In the present embodiment, it is set in advance whether or not the received broadcast is automatically switched. FIG. 14 is a diagram illustrating an example of an image in an automatic switching setting for received broadcasts. When the user operates the operation unit 62 to instruct display of the menu image, the CPU 22 in the processing unit 20 inputs a signal corresponding to the instruction via the input / output unit 24. Then, the CPU 22 instructs the display processing unit 46 to display a menu image in response to the user's instruction. In response to this instruction, the display processing unit 46 generates the menu image shown in FIG.

  When the user touches the “other setting” display area 205 in the menu image displayed on the display 60, a signal to that effect is input to the CPU 22 via the input / output unit 24. When the CPU 22 inputs a signal indicating that the display area 205 is touched, the CPU 22 instructs the display processing unit 46 to display the setting image. In response to this instruction, the display processing unit 46 generates a setting image shown in FIG. When the user touches the “ON” display area 212 or “OFF” display area 213 of the automatic reception switching in the setting image displayed on the display 60, a signal to that effect is input to the CPU 22 via the input / output unit 24. Is done. When the CPU 22 inputs a signal indicating that the display area 212 is touched, the CPU 22 stores setting information indicating that the received broadcast is automatically switched in the RAM 26 and when the signal indicating that the display area 213 is touched is input, Setting information indicating that reception broadcast switching is not automatically performed is stored in the RAM 26.

  FIG. 15 is a flowchart showing the operation of the digital television broadcast receiver 100 in the seventh embodiment. The operations in S701 and S707 are the same as the operations in S601 and S607 in the flowchart shown in FIG.

  If it is determined in S706 that the result of the IC card test is not good, in other words, if an error of the IC card 200 is detected, the CPU 22 determines whether or not the setting for automatically switching the received broadcast is made. Is determined (S708). Specifically, when the setting information for automatically switching the received broadcast is stored in the RAM 26, the CPU 22 determines that the setting for automatically switching the received broadcast is made. If the setting information indicating that the received broadcast is not automatically switched is stored, it is determined that the setting indicating that the received broadcast is not automatically switched is made.

  When the setting for automatically switching the received broadcast is made, the CPU 22 performs control so that the tuner 36 extracts another digital television broadcast signal from the broadcast signal received by the antenna 10. Thereby, the broadcast received by the digital television broadcast receiver 100 is switched from the digital television broadcast requiring descrambling to another digital television broadcast (S709). On the other hand, if the setting is made not to automatically switch the received broadcast, the operation of S709 is not performed. Thereafter, in S710 and S711, the same operations as in S610 and S611 in the flowchart shown in FIG. 12 are performed.

  As described above, when an error occurs in the IC card 200 in which the descrambling information is stored, the digital television broadcast receiver 100 according to this embodiment allows the user to watch a digital television broadcast that requires descrambling. If it is not possible to switch to other digital TV broadcasts automatically or by a simple user operation, complicated user operations are required even when viewing digital TV broadcasts that require descrambling is not possible In addition, the operability is improved.

  In the above-described embodiment, the test is performed on the IC card 200. However, the present invention can be similarly applied to the case where the test of the IC chip 30 in which the descrambling information is stored is performed.

  In the above-described embodiment, when the user cannot view a digital television broadcast that requires descrambling, the CPU 22 is controlled to switch to reception of another digital television broadcast. Control to switch to broadcasting may be performed. In this case, the CPU 22 performs control so that the tuner 36 extracts an analog television broadcast signal and a radio broadcast signal from the broadcast signal received by the antenna 10.

  Alternatively, when the user cannot watch a digital television broadcast that requires descrambling, the CPU 22 may perform control to reproduce content stored on a medium such as a CD or DVD other than the broadcast. In this case, the CPU 22 reads content data from a medium such as a CD or DVD (not shown) via the input / output unit 24, outputs the audio data included in the content data to the audio decoder 42, and outputs the image data to the image decoder. 44. The audio decoder 42 decodes the input audio data, extracts an audio signal, and outputs it to the speaker 50. The image decoder 44 extracts the image signal by decoding the input image data. The display processing unit 46 performs processing necessary for image display on the display 60 based on the image signal from the image decoder 44. As a result, the content is reproduced. Further, even when the digital TV broadcast receiver 100 does not selectively receive the digital TV broadcast that requires descrambling and other broadcasts as described above, but only receives the digital TV broadcast that requires descrambling. Similarly, when the user cannot watch a digital television broadcast that requires descrambling, the CPU 22 may control to play back content stored on a medium such as a CD or DVD other than the broadcast. Good.

As described above, the digital broadcast receiver and the digital broadcast reception method according to the present invention can improve the operability and are useful as a digital television broadcast receiver or the like.

It is a figure which shows the structure of a digital television broadcast receiver. It is a flowchart which shows operation | movement of 1st Example. It is a figure which shows the content example of an IC card test, and the content example of an error. It is a flowchart which shows operation | movement of 2nd Example. It is a figure which shows an example of the display image in 2nd Example. It is a flowchart which shows operation | movement of 3rd Example. It is a figure which shows the 1st example of the display image in 3rd Example. It is a figure which shows the 2nd example of the display image in 3rd Example. It is a flowchart which shows the operation | movement in 4th Example. It is a figure which shows an example of the display image in 5th Example. It is a flowchart which shows operation | movement of 5th Example. It is a flowchart which shows operation | movement of 6th Example. It is a figure which shows an example of the display image in 6th Example. It is a figure which shows an example of the display image in 7th Example. It is a flowchart which shows operation | movement of 7th Example.

Explanation of symbols

10 antenna 20 processing unit 21 bus 22 CPU
24 I / O section 26 RAM
28 ROM
30 IC chip 32 Card slot 34 Communication unit 36 Tuner 38 Demodulation unit 40 TS decoder 42 Audio decoder 44 Image decoder 46 Display processing unit 50 Speaker 60 Display 62 Operation unit 100 Digital TV broadcast receiver 200 IC card

Claims (2)

Receiving means for receiving a digital broadcast signal that requires descrambling;
A test means for testing a storage medium in which descrambling information for descrambling is stored when the reception intensity of the receiving means is a predetermined value or less ;
Control means for causing the display means to display a test result of the storage medium performed by the test means,
The control means causes the receiving means to receive a broadcast signal other than the digital broadcast signal that needs to be descrambled when the test means detects an error in the storage medium, and causes a management center to store the storage medium in the storage medium. In response to an instruction to notify the abnormality, the management center is notified of the abnormality of the storage medium, and if no error of the storage medium is detected by the test means, the display means has a poor reception sensitivity. A digital broadcast receiver characterized by displaying the effect . A digital broadcast receiving method for a digital broadcast receiver,
Receiving a digital broadcast signal requiring descrambling by a receiving means;
A test of a storage medium storing descrambling information for descrambling when the receiving intensity of the receiving means is a predetermined value or less;
Displaying the test result of the storage medium on a display means;
When an error of the storage medium is detected by the storage medium test, the receiving means receives a broadcast signal other than the digital broadcast signal that requires the descrambling, and notifies the management center of the abnormality of the storage medium In response to the instruction to notify the management center of the abnormality of the storage medium;
When an error of the storage medium is not detected by the test of the storage medium, displaying the display means that the reception sensitivity has deteriorated on the display means;
A digital broadcast receiving method comprising:

Images