JP2003115775A - Digital broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a stand-by time from power supply to service start in a digital broadcast receiver. SOLUTION: A part of all the services of a digital broadcast receiver are selected as partial services. When power is supplied, a partial service providing task 20 initializes only a module necessary for providing partial services, and starts early the provision of the partial services. When a full service providing task 30 ends the initialization of the residual modules, the partial service providing task 20 writes a parameter used at the time of providing the partial services in a parameter holding part 51, and ends the processing according to the instruction from a main task 10. The full service providing task 30 reads the written parameter, and starts the provision of the full services. The partial services include a vide service for reproducing a video/voice signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast receiving apparatus, and more particularly to a digital broadcast receiving apparatus that shortens the waiting time from power-on or reset to service start.

[0002]

2. Description of the Related Art In recent years, as digital broadcasting has become more sophisticated, various interactive services have been provided. In order to provide this variety of services, the digital broadcast receiving device performs the same or more processing as a personal computer. Along with this, in the digital broadcast receiving apparatus, it is necessary to perform many initialization procedures from power-on to service start. This initialization procedure includes, for example, a process of initializing the OS built in the receiving device and various software operating on the OS, a process of authenticating the user on the digital broadcasting center facility or the receiving device, and a center facility. It includes a process of acquiring program information from the.

A conventional digital broadcast receiving apparatus provides a service for reproducing a video / audio signal based on a received signal (hereinafter referred to as a video service) after completing all the initialization procedures. Therefore, in the conventional digital broadcast receiving apparatus, there is a problem that it takes, for example, several tens of seconds to several minutes from the power-on to the start of viewing the program.

In order to solve this problem, the conventional digital broadcast receiving apparatus has a standby mode. In the receiving device having the standby mode, once the power is turned on, the internal circuit always operates and the preparation for service provision is always made unless the power supply from the power cable is stopped.

[0005]

However, in order for the standby mode to function effectively, it is necessary that the initial power supply be turned on and that various software for providing services be operating normally. It Therefore, when the initial power is turned on or when the receiving device is reset due to an abnormality in hardware or software, the user has to wait a considerable amount of time before the service starts. In addition, service providers are also demanding to reduce the waiting time from the reset to the start of the service.

In order to reduce the waiting time until the start of service, in addition to providing the standby mode, a method of providing special hardware or a method of increasing the memory can be considered. However, these methods require a high-speed CPU and a huge amount of memory, which increases the cost of the receiving device. Therefore, it is difficult in terms of cost to apply these methods to a digital broadcast receiving device belonging to a general-purpose product.

Therefore, an object of the present invention is to provide a digital broadcast receiving apparatus which does not have special hardware and which shortens the waiting time from power-on or reset to service start by the action of software. .

[0008]

[Means for Solving the Problems and Effects of the Invention] The first invention is a digital broadcast receiving apparatus for providing some services before other services out of all services, and Partial service processing means for executing various kinds of processing necessary for providing services, other service processing means for executing various kinds of processing necessary for providing other services, and initialization of the partial service processing means after startup, and thereafter a disconnection instruction Until it receives the partial service processing means, it initializes the partial service providing means for providing some services and the other service processing means after starting, and after receiving the connection instruction, the partial service processing means and the other service. Using the processing means, the full service providing means for providing the entire service and the partial service providing means are activated, and the initialization of the partial service processing means is completed. And a control means for outputting a disconnection instruction to the partial service providing means and a connection instruction to the full service providing means when the full service providing means is started and the initialization of the other service processing means is completed. .

According to the first aspect of the invention, the partial service providing means initializes only the partial service processing means and provides a part of the services early, before the entire service is provided. As a result, it is possible to shorten the waiting time from power-on or reset until some services are provided. In particular, if a video service that reproduces a video / audio signal based on a received signal is included in some services that should be provided early, the user can start watching the program early after power-on or reset.

A second invention is the first invention, further comprising a parameter holding means for holding a parameter necessary for providing a part of the service, wherein the partial service providing means receives the disconnection instruction. The parameters used when providing some services are written in the parameter holding means, and the full service providing means reads the parameters written in the parameter holding means when the connection instruction is received and partially It is characterized by being used for providing the service of.

According to the second aspect of the invention as described above, the parameters required for providing a part of the service are passed from the partial service providing means to the whole service providing means by the parameter holding means. As a result, it is possible to quickly shift from the state of providing some services to the state of providing all services.

A third aspect of the present invention further comprises a state holding means for holding the operating state of the full service providing means, wherein the full service providing means is held by the state holding means at predetermined time intervals. The operating state is updated, the control means, based on the operating state held in the state holding means,
An abnormality of the full service providing means is detected, and when the abnormality is detected, the partial service providing means is restarted from the initial state.

According to the third aspect of the invention, when an abnormality occurs in the full service providing means, the partial service providing means operates again from the initial state. As a result, even if an abnormality occurs during the service provision, the waiting time from the occurrence of the abnormality until the provision of some services can be shortened. In particular, if the video service is included in some services that should be provided early, even if an abnormality occurs during the provision of the service, the user can start watching the program again early.

A fourth invention is characterized in that, in the third invention, the control means executes a hardware reset when an abnormality of the full service providing means is detected.

According to the fourth aspect of the invention, if an abnormality occurs during service provision, the device is reset and operates from the initial state. As a result, the abnormal state of the device can be reliably eliminated, and the waiting time until some services are provided can be shortened as compared with the conventional case.

In a fifth aspect based on the third aspect, the partial service providing means terminates the operation after responding to the disconnection instruction, and the control means operates the full service providing means when an abnormality is detected in the full service providing means. Along with ending
It is characterized in that the partial service providing means is activated again.

According to the fifth aspect of the invention, when an abnormality occurs during the service provision, the partial service providing means in the operation end state is restarted. This allows
Compared with the method of resetting the device, the waiting time until some services are provided can be further shortened by the time required to load various software into the main memory.

In a sixth aspect based on the third aspect, the partial service providing means transitions to a waiting state after responding to the disconnection instruction, and the control means provides the full service providing means when an abnormality is detected in the full service providing means. Is terminated, the waiting state of the partial service providing means is released, and the partial service providing means is restarted from the initial state.

According to the sixth aspect of the invention, when an abnormality occurs during the service provision, the partial service provision means resumes operation from the waiting state. With this, rather than restarting the full service providing means from the operation end state,
The waiting time before providing some services can be further shortened.

A seventh invention is characterized in that, in the first invention, a part of the services includes a video service for reproducing a video / audio signal based on a received signal.

According to the seventh aspect, the user can start watching the program early after turning on or resetting the power.

An eighth invention is characterized in that, in the first invention, the partial service providing means, the full service providing means and the control means are realized by operating different tasks from each other.

According to the eighth aspect of the invention, the partial service providing means, the full service providing means, and the control means operate independently of each other, so that even if an abnormality occurs in the full service providing means, the operation is more reliable. The partial service providing means can be operated from the initial state.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the first to third embodiments of the present invention.
2 is a block diagram showing a hardware configuration of a digital broadcast receiving apparatus according to the embodiment of FIG. Each of the digital broadcast receiving devices according to the first to third embodiments has the hardware configuration shown in FIG. 1 and has a software configuration unique to each embodiment.

The digital broadcast receiving apparatus 1 shown in FIG. 1 includes a communication section 2, a tuner section 3, a decryption section 4, a decoding section 5,
It has a CPU 6, a RAM 7, and a non-volatile memory 8, and operates as follows, like a general digital broadcast receiving apparatus.

The digital broadcast receiving apparatus 1 includes an antenna 10
3, the antenna 103 receives the radio wave transmitted from the digital broadcasting center equipment 101. The tuner unit 3 extracts a signal in a predetermined frequency band from the received signal and obtains a digital signal. The decryption unit 4 decrypts the encryption of the digital signal obtained by the tuner unit 3. The decoding unit 5 reproduces a video / audio signal based on the digital signal after the decryption of the code. The reproduced video and audio signal is the TV 1
It is output to 04.

The CPU 6 executes various software for controlling the digital broadcast receiving apparatus 1. RAM7 is CP
It is the main memory of U6. The non-volatile memory 8 is CP
The software executed in U6 is stored without losing the contents even when the power supply is stopped. The software stored in the non-volatile memory 8 is stored in the RAM when the power is turned on.
7 is loaded and initialized.

The digital broadcast receiving apparatus 1 is connected to the digital broadcast center equipment 101 via the communication network 102. The CPU 6 controls the communication unit 2 when the power is turned on.
To communicate with the digital broadcasting center facility 101. Thereby, for example, the user authentication is performed on the digital broadcasting center equipment 101 or the digital broadcasting receiving apparatus 1, and the program information is acquired from the digital broadcasting center equipment 101.

In the digital broadcast receiving apparatus 1, it may be necessary to reset the apparatus due to an abnormality in hardware or software. At the time of reset, the digital broadcast receiving apparatus 1 performs the same operation as when the power is turned on. In the digital broadcast receiving apparatus shown in FIG. 1, the video / audio signal is received wirelessly from the digital broadcasting center facility 101, but the video / audio signal may be received by wire, and the nonvolatile memory 8 stores the video / audio signal. Instead, a hard disk or the like may be used.

The software of the digital broadcast receiving apparatus 1 will be described below. In the digital broadcast receiver 1,
The entire services that can be provided with all the software initialized are called "full services", and some services selected from the full services are called "partial services". The partial service includes a video service for reproducing a video / audio signal based on a received signal.
In addition to the video service, any service can be selected as a partial service based on the content of each service and the time required for initialization. For example, all services that do not require user authentication (including video services) can be selected as partial services.

(First Embodiment) FIG. 2 shows a first embodiment of the present invention.
3 is a diagram showing a software configuration of the digital broadcast receiving apparatus according to the embodiment of FIG. The digital broadcast receiving apparatus 1a shown in FIG. 2 includes a main task 10 and a partial service providing task 2.
0, a full service providing task 30, a service processing module 40, and a parameter holding unit 51. The main task 10, the partial service providing task 20, and the full service providing task 30 are all OSs.
It operates independently as a task under the control of (not shown).

The service processing module 40 is a software group for processing various services in digital broadcasting. The service processing module 40 includes, for example, software that controls the communication unit 2 to perform user authentication, software that sets a frequency band to be extracted in the tuner unit 3, software that sets an encryption key in the decryption unit 4, and the like. The decoding unit 5 includes software for setting decoding parameters. In response to the selection of the partial service from the full service, the service processing module 40 includes a partial service processing module 41 that is a software group that processes the partial service and another service processing that is a software group that processes the other service. Module 42.

The partial service providing task 20 includes a partial service initializing unit 21, a partial service providing unit 22, and
A partial service is provided by using the partial service processing module 41 including the service processing module separating unit 23. On the other hand, the full service providing task 30
Full service initialization unit 31, full service providing unit 32,
Also, the service processing module connection unit 33 is included, and the service processing module 40 is used to provide a full service. The main task 10 includes a task management unit 11 and a task switching unit 12, and the partial service providing task 2
0 and the full service provision task 30. The parameter holding unit 51 holds the parameters passed from the partial service providing task 20 to the full service providing task 30. The details of the components of each task will be described later.

FIG. 3 is a diagram showing an example of the memory map of the RAM 7. As described above, in the digital broadcast receiving device 1a, the software stored in the non-volatile memory 8 is loaded into the RAM 7 when the power is turned on. Therefore, as shown in FIG. 3, the OS 71, the main task code 72, the partial service providing task code 73, the full service providing task code 74, and the service processing module code 75 are stored in the RAM 7 after the loading is completed. In FIG. 3, the service processing module work area 76 is a working memory of the service processing module 40. In the service processing module work area 76,
For example, a frame memory used when the decoding unit 5 decodes a video signal is arranged. The shared memory area 77 is a memory area accessible from each task. The parameter holding unit 51 shown in FIG. 2 is arranged in the shared memory area 77.

The main task 10, the partial service providing task 20, and the full service providing task 30 generally operate as follows (see FIG. 4). In the digital broadcast receiving device 1a, the main task 10 is executed when the power is turned on (time T0). The main task 10 first activates the partial service providing task 20. The started partial service providing task 20 is a service processing module 40.
Of these, only the partial service processing module 41 is initialized and the provision of partial services is started at time T1. Since the partial service includes the video service, time T1
Thereafter, the video / audio signal is output to the television 104.

Next, the main task 10 activates the full service providing task 30. The activated full service providing task 30 initializes another service processing module 42 of the service processing modules 40. When the initialization is completed, the main task 10 outputs a module disconnection instruction to the partial service providing task 20 and outputs a module connection instruction to the full service providing task 30. Upon receiving the instruction, the partial service providing task 20 writes the parameter used when providing the partial service in the parameter holding unit 51 and stops. Further, the full service providing task 30 that has received the instruction starts providing the full service at the time T2 using the parameters read from the parameter holding unit 51.

5, 6 and 7 are flowcharts showing the operations of the main task 10, the partial service providing task 20 and the full service providing task 30 of the digital broadcast receiving apparatus 1a according to the present embodiment, respectively. . The operation of each task will be described in detail with reference to these flowcharts.

First, the operation of the main task 10 will be described with reference to FIG. The main task 10 is activated when the digital broadcast receiving device 1a is powered on. When the main task 10 is activated, first the task management unit 11
Starts the partial service providing task 20 (step S
101), and waits until an initialization completion notification is received from the partial service initialization unit 21 (step S102). Upon receiving the initialization completion notification, the task management unit 11 activates the full service providing task 30 (step S103),
It waits until it receives an initialization completion notification from the full service initialization unit 31 (step S104).

Upon receiving the initialization completion notification, the task management section 11 outputs a task switching instruction to the task switching section 12. The task switching unit 12 that has received the instruction outputs a module disconnection instruction to the service processing module disconnection unit 23 (step S105), and waits until a disconnection completion notification is received from the service processing module disconnection unit 23 (step S106). Upon receiving the disconnection completion notification, the task switching unit 12 outputs a module connection instruction to the service processing module connection unit 33 (step S107). After that, the main task 10 stops itself.

Next, the operation of the partial service providing task 20 will be described with reference to FIG. Partial service provision task 2
0 indicates that the task management unit 11 performs step S1 in FIG.
It is started with 01. When the partial service providing task 20 is activated, the partial service initialization unit 21 causes the partial service processing module 4 of the service processing modules 40 to
Only 1 is initialized (step S201). Since the partial service processing module 41 is a part of the service processing module 40, this initialization processing can be performed in a shorter time than the initialization processing of the entire service processing module 40. When the initialization is completed, the partial service initialization unit 21 notifies the task management unit 11 of the completion of initialization (step S20).
2).

After step S202, the partial service providing unit 22 keeps the partial service processing module 4 until the module disconnection instruction is received from the task switching unit 12.
1 is used to provide a partial service (step S20).
3 and S204). Since the partial service includes the video service, the video / audio signal is output to the television 104 during this period, and the user can watch the video / audio signal.

When the module disconnection instruction is received (YES in step S203), the service processing module disconnection unit 23 writes the parameter used when providing the partial service in the parameter holding unit 51 (step S205). In step S205, the parameter holding unit 51 stores, for example, the frequency band to be extracted set in the tuner unit 3, the encryption key set in the decryption unit 4, the decoding parameter set in the decoding unit 5, and the like.
Written in. Next, the service processing module disconnecting unit 23 performs a process of disconnecting the service processing module 40, that is, a process of stopping the use of the partial service processing module 41 by the partial service providing unit 22 (step S206). Next, the service processing module disconnection unit 23 notifies the main task 10 of the completion of the module disconnection (step S207) and stops itself.

Even after the partial service providing task 20 performs the module separation process, the RAM 7 includes the service processing module code 75 and the service processing module work area 76 including a frame memory for video reproduction.
Then, the contents of the shared memory area 77 are left as they are.
Therefore, the full service providing task 30 is executed in the RAM 7
By using these codes and data stored in the above, the processing performed by the partial service providing task 20 can be taken over.

Next, the operation of the full service providing task 30 will be described with reference to FIG. Full service provision task 3
0 indicates that the task management unit 11 performs step S1 in FIG.
It is started with 03. When the full service providing task 30 is activated, the full service initialization unit 31 causes the partial service processing module 4 of the service processing modules 40 to
Modules other than 1, that is, other service processing modules 42 are initialized (step S301). When the initialization process is completed, the full service initialization unit 31 notifies the task management unit 11 of the completion of initialization (step S3).
02). After that, the full service providing task 30 waits until it receives a module connection instruction from the task switching unit 12 (step S303). The full service providing task 30 is configured not to use the partial service processing module 41 until receiving the module connection instruction.

Upon receiving the module connection instruction, the service processing module connection unit 33 causes the parameter holding unit 51 to
The parameters written in are read (step S30
4). Next, the service processing module connection unit 33 uses the read parameter to perform a process of connecting to the partial service processing module 41, that is, a process of causing the full service providing unit 32 to start using the partial service processing module 41 ( Step S305). Step S3
In 05, the read parameter is supplied to the full service providing unit 32. Accordingly, the full service providing unit 32 can take over the parameters used when the partial service providing unit 22 provides the partial service. After that, the full service providing unit 32 repeats the process of providing the full service (step S306).

The effect of the digital broadcast receiving apparatus 1a will be described with reference to FIG. 4 again. As shown in FIG. 4, in the digital broadcast receiving device 1a, when the power is turned on at time T0, only the partial service processing module 41 is initialized first, and after time T1 when the initialization is completed, the partial service is not started. Provided. Since the partial service includes the video service, a video / audio signal is output to the television 104 after time T1, and the user can watch this. After that, the initialization of the entire service processing module 40 is completed, and after the time T2 when the module is disconnected and connected, full service is provided. That is,
According to the digital broadcast receiving apparatus 1a, after the power is turned on, the output of the video / audio signal is started at time T1 and the full service is started at time T2.

On the other hand, according to the conventional digital broadcast receiving apparatus, since the video service is provided after the initialization process is completed after the power is turned on, the time T shown in FIG.
No service is provided until x. As described above, according to the digital broadcast receiving apparatus 1a of the present embodiment, the waiting time from the power-on to the start of service is set to the time (T2-T).
1) It can be shortened by a minute. Particularly, since the partial service includes the video service, the output of the video / audio signal is started early after the power is turned on, and the user can watch the program early.

Further, the parameter holding unit 51 is used to take over the parameter used by the partial service providing task 20 to the full service providing task 30 to reduce the overhead at the time of task switching, and change from the partial service to the full service. You can move quickly.

As described above, according to the digital broadcast receiving apparatus of the present embodiment, the partial service providing task initializes only a necessary part of the service processing module before providing the full service, Providing partial services early. As a result, the waiting time from power-on or reset until the partial service is provided can be shortened. In particular, since the partial service includes the video service, the user can watch the program early when the power is turned on or reset. Also, by placing the necessary parameters in the shared memory area and handing over from the partial service providing task to the full service providing task, the overhead at task switching can be reduced, and the partial service can be quickly switched to the full service. .

(Second Embodiment) FIG. 8 shows a second embodiment of the present invention.
3 is a diagram showing a software configuration of the digital broadcast receiving apparatus according to the embodiment of FIG. The digital broadcast receiving apparatus 1b shown in FIG. 8 includes a main task 13 and a partial service providing task 2.
0, full service providing task 34, service processing module 40, parameter holding unit 51, task state holding unit 5
2 and a hard reset execution unit 61. Among the constituent elements of this embodiment, the same constituent elements as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The digital broadcast receiving apparatus 1b is characterized by monitoring the operating state of the full service providing task 34 and resetting the hardware when an abnormality occurs. The task state holding unit 52 is arranged in the shared memory area 77 of the RAM 7 and holds the task state S of the full service providing task 34.

The full service providing task 34 is obtained by adding a task state updating section 35 to the full service providing task 30 according to the first embodiment. The task status updating unit 35 sets “1” to the task status S held in the task status holding unit 52 at a predetermined time interval.

The main task 13 is obtained by adding a task monitoring section 15 to the main task 10 according to the first embodiment. The task monitoring unit 15 reads out the task status S held in the task status holding unit 52 at predetermined time intervals and detects an abnormality in the full service providing task 34. Specifically, if the read task status S is "1", the task monitoring unit 15 determines that the full service providing task 34 is operating normally, and sets the task status S to "0". . On the other hand, if the read task status S is “0”, the task monitoring unit 15 determines that the full service providing task 34
It is determined that an abnormality has occurred in the task management unit 14
To notify. The task management unit 14 that has received the notification outputs a reset instruction to the hard reset execution unit 61.

The hardware reset execution unit 61 resets the hardware of the digital broadcast receiving apparatus 1b according to the instruction from the task management unit 14. At the time of reset, the digital broadcast receiving device 1b performs the same operation as when the power is turned on.
In this way, by resetting the hardware when the abnormality occurs in the full service providing task, it is possible to reliably eliminate the abnormal state of the device.

9 and 10 are flowcharts showing the operations of the main task 13 and the full service providing task 34 of the digital broadcast receiving apparatus 1b, respectively. The partial service providing task 20 performs the same operation as that of the first embodiment.

In the flowchart of the main task 13 shown in FIG. 9, the processes of steps S401 to S407 are as follows.
Since the processing is the same as the processing in steps S101 to S107 in FIG. 5, description thereof will be omitted. After step S407, the task monitoring unit 15 reads out the task status S held in the task status holding unit 52 (step S408). If the read task status S is "1" (Y in step S409)
ES), the task monitoring unit 15 determines that the full service providing task 34 is operating normally. In this case, the task monitoring unit 15 sets “0” in the task state S (step S410), waits for a predetermined time (step S411), and then proceeds to step S408.

On the other hand, if the read task state S is "0" (NO in step S409), the task monitoring unit 15
Determines that an abnormality has occurred in the full service providing task 34, and notifies the task management unit 14 to that effect. The task management unit 14 that has received the notification outputs a reset instruction to the hard reset execution unit 61, and the hardware reset execution unit 61 that has received the notification resets the hardware of the digital broadcast receiving device 1b (step S412). At the time of reset, the main task 13 restarts the process from step S401.

The full service providing task 34 shown in FIG.
In the flowchart of FIG.
The process of 6 is the same as the process of steps S301 to S306 of FIG. 7, and thus the description thereof will be omitted. After the step S506, when the timer interruption has occurred (YES in step S507), the task state updating unit 35 sets “1” to the task state S held in the task state holding unit 52 (step S506). S508).

As described above, according to the digital broadcast receiving apparatus of the present embodiment, the full service providing task periodically updates the task state, and the main task detects the abnormality of the full service providing task based on the task state. If an abnormality occurs, a hard reset is executed. At the time of a hard reset, the partial service is provided by the partial service providing task before the full service is provided as at the time of power-on. Therefore, it is possible to reliably eliminate the abnormal state of the device and reduce the waiting time until the partial service is provided, as compared with the conventional digital broadcast receiving device. In particular, since the partial service includes the video service, the user can watch the program early even when an abnormality occurs.

(Third Embodiment) FIG. 11 is a diagram showing the software configuration of a digital broadcast receiving apparatus according to the third embodiment of the present invention. The digital broadcast receiving apparatus 1c shown in FIG. 11 includes a main task 16, a partial service providing task 20, a full service providing task 34, a service processing module 40, a parameter holding unit 51, and a task state holding unit 52. Of the constituent elements of this embodiment, the same constituent elements as those of the first or second embodiment are designated by the same reference numerals, and description thereof will be omitted.

The digital broadcast receiving apparatus 1c monitors the operation state of the full service providing task 34, forcibly terminates the full service providing task 34 when an abnormality occurs, and restarts the partial service providing task 20. And

FIG. 12 is a flowchart showing the operation of the main task 16 of the digital broadcast receiving apparatus 1c. Partial service provision task 20 and full service provision task 3
4 performs the same operation as in the second embodiment.

In the flow chart shown in FIG. 12, the processing of steps S601 to S611 is the same as step S of FIG.
Since it is the same as the processing of 401 to S411, description thereof will be omitted. If the task status S read in step S608 is “0” (NO in step S609), the task monitoring unit 15 determines that an abnormality has occurred in the full service providing task 34, and notifies the task management unit 17 of that fact. Notice.
Upon receiving the notification, the task management unit 17 forcibly terminates the full service providing task 34 (step S612), and proceeds to step S601.

The main task 16 again executes step S601.
When executing, the partial service provision task code 7
3, the full service providing task code 74 and the service processing module code 75 are already loaded in the RAM 7. The main task 16 activates the partial service providing task 20 again by using the partial service providing task code 73 already loaded on the RAM 7 (step S601). After step S601, each task of the digital broadcast receiving apparatus 1c performs the same operation as when the power is turned on.

As described above, according to the digital broadcast receiving apparatus of the present embodiment, the full service providing task periodically updates the task state, and the main task detects the abnormality of the full service providing task based on the task state. When the error is detected, the full service providing task is forcibly terminated and the partial service providing task is started again. As a result, even when an abnormality occurs in the full service providing task, the partial service is provided by the partial service providing task before the full service is provided. Therefore, the waiting time until the partial service is provided can be further shortened by the time required for loading the software into the main memory, as compared with the method of resetting the device. In particular,
Since the partial service includes the video service, the user can watch the program early even when an abnormality occurs.

In this embodiment, the partial service providing task is stopped after processing the disconnection instruction, and the main task detects the abnormality of the full service providing task,
It was decided to restart the partial service provision task. Instead, the partial service providing task transits to the state of waiting for the restart instruction from the main task after processing the disconnection instruction, and the main task outputs the restart instruction when detecting the abnormality of the full service providing task and restarts. The partial service providing task that has received the instruction may exit the waiting state and restart from the initial state. According to such a modification, the waiting time until the partial service is provided can be further shortened by the time required to activate the task, as compared with the method of activating the full service providing task again.

[Brief description of drawings]

FIG. 1 is a block diagram showing a hardware configuration of a digital broadcast receiving apparatus according to first to third embodiments of the present invention.

FIG. 2 is a diagram showing a software configuration of the digital broadcast receiving apparatus according to the first embodiment of the present invention.

FIG. 3 is a diagram showing an example of a memory map of a RAM of the digital broadcast receiving apparatus according to the first to third embodiments of the present invention.

FIG. 4 is a timing chart showing the operation of each task of the digital broadcast receiving apparatus according to the first embodiment of the present invention.

FIG. 5 is a flowchart of main tasks of the digital broadcast receiving apparatus according to the first embodiment of the present invention.

FIG. 6 is a flowchart of a partial service providing task of the digital broadcast receiving apparatus according to the first to third embodiments of the present invention.

FIG. 7 is a flowchart of full service providing tasks of the digital broadcast receiving apparatus according to the first embodiment of the present invention.

FIG. 8 is a diagram showing a software configuration of a digital broadcast receiving apparatus according to a second embodiment of the present invention.

FIG. 9 is a flowchart of main tasks of the digital broadcast receiving apparatus according to the second embodiment of the present invention.

FIG. 10 is a flowchart of full service providing tasks of the digital broadcast receiving apparatus according to the second and third embodiments of the present invention.

FIG. 11 is a diagram showing a software configuration of a digital broadcast receiving apparatus according to a third embodiment of the present invention.

FIG. 12 is a flowchart of main tasks of the digital broadcast receiving apparatus according to the third embodiment of the present invention.

[Explanation of symbols] 1 ... Digital broadcasting receiver 10, 13, 16 ... Main task 11, 14, 17 ... Task management unit 12 ... Task switching unit 15 ... Task monitoring unit 20 ... Partial service provision task 21 ... Partial service initialization unit 22 ... Partial service provision department 23 ... Service processing module separation unit 30, 34 ... Full service provision task 31 ... Full service initialization unit 32 ... Full Service Department 33 ... Service processing module connection section 35 ... Task status update unit 40 ... Service processing module 41 ... Partial service processing module 42 ... Other service processing module 51 ... Parameter holding unit 52 ... Task state holding unit 61 ... Hard reset execution unit

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Claims (8)

[Claims] 1. A digital broadcast receiving apparatus that provides some services prior to other services in the overall services, and is a partial service that executes various processes required to provide the some services. Processing means, other service processing means for executing various processes required to provide the other service, and initialization of the partial service processing means after startup, and thereafter, the partial service processing means is used until a disconnection instruction is received. Then, by using the partial service providing means for providing the partial service and the other service processing means after starting, and after receiving the connection instruction, the partial service processing means and the other service processing means are used. , Full service providing means for providing the entire service, starting the partial service providing means, and completing initialization of the partial service processing means The full service providing means is started, and when the initialization of the other service processing means is completed, the disconnection instruction is given to the partial service providing means and the connection instruction is given to the full service providing means. A digital broadcast receiving apparatus, comprising: a control unit for outputting. 2. The apparatus further comprises parameter holding means for holding a parameter required when providing the partial service, wherein the partial service providing means receives the partial service when receiving the disconnection instruction. The parameter used at the time of providing is written in the parameter holding unit, the full service providing unit reads the parameter written in the parameter holding unit when the connection instruction is received, and the partial service The digital broadcast receiving device according to claim 1, wherein the digital broadcast receiving device is used for providing a service. 3. A state holding unit for holding an operating state of the full service providing unit is further provided, wherein the full service providing unit updates the operating state held by the state holding unit at a predetermined time interval, The control means detects an abnormality of the full service providing means based on the operating state held by the state holding means, and when the abnormality is detected, restarts the partial service providing means from the initial state, The digital broadcast receiving apparatus according to claim 2. 4. The digital broadcast receiving apparatus according to claim 3, wherein the control unit executes a hardware reset when the abnormality of the full service providing unit is detected. 5. The partial service providing means terminates its operation after responding to the disconnection instruction, and the control means terminates the full service providing means when detecting an abnormality of the full service providing means, and 4. The digital broadcast receiving apparatus according to claim 3, wherein the partial service providing means is activated again. 6. The partial service providing means transitions to a waiting state after responding to the disconnection instruction, and the control means terminates the full service providing means when an abnormality is detected in the full service providing means, Release the waiting state of the partial service providing means,
The digital broadcast receiving apparatus according to claim 3, wherein the digital broadcast receiving apparatus is operated again from the initial state. 7. The digital broadcast receiving apparatus according to claim 1, wherein the part of services includes a video service for reproducing a video / audio signal based on a received signal. 8. The digital apparatus according to claim 1, wherein the partial service providing unit, the full service providing unit, and the control unit are realized by operating different tasks from each other. Broadcast receiver.