KR19990049754A - How to implement preset recording function when power is reapplied after power failure - Google Patents

Abstract

The present invention relates to a reserved recording technology, in particular, when a reservation recording of programs received through a digital satellite broadcast receiver, when a phenomenon such as a power failure, reservation without maintaining the time data using the auxiliary battery When the stand-by power is applied to the system again after the power failure is resolved after the power failure, the MCU switches the power supply state to the main power on state. Check whether there is a preset recording function, and if the preset recording function exists, obtain time information from the data received through the receiver, reset the counter for implementing the scheduled recording function, and then switch the power state to the stand-by state. Scheduled recording at the scheduled time by counting the counter from the stand-by state to the scheduled time By performing the function, there is an effect that it is not necessary to use an auxiliary power supply to prevent data loss in case of power failure.

Description

How to implement scheduled recording function when power is reapplied after power failure

The present invention relates to a reserved recording technology, and in particular, when a scheduled recording of programs received through a digital satellite broadcast receiver is required to perform a scheduled recording of a program by reproducing a time due to a power failure, etc. A technique for performing reservation recording by reproducing time from a transport stream.

For the program reservation recording function, a technology for recording at a precise reservation time is the key. Generally, a method of approaching a reservation time by recognizing a difference between a current time and a reservation time is used.

When approaching the reservation time by the difference between the current time and the reservation time, the method of approaching the reservation time by counting up the difference time between the current time and the reservation time at the current time, setting the tea time at the counter, There is a way to approach the reservation time by counting down until it becomes '0'.

The counter generally uses a counter of a micro control unit (MCU).

All of the above methods are performed using time information. Therefore, when implementing the reservation recording function as described above, accurate information about time is essential. However, if power is not applied to the system due to a power outage, a phenomenon occurs in which time information is lost, and this phenomenon is an obstacle to implementing a reservation recording function.

In the broadcast system as described above, a method for preventing time information disappearing due to a power failure includes a method of using an auxiliary battery. That is, when the main power is turned off due to a power failure or the like, power is supplied to the system by using an auxiliary battery, thereby improving the loss of time and other information that the system has. The method of using the auxiliary battery as described above is also a method used to increase power efficiency in a stand-by state in a system using a remote controller.

However, the method of using the auxiliary battery as described above has a problem in that the capacity of the battery is limited, and a nonvolatile memory in which stored data is not erased is used to prevent data loss when power is switched.

The present invention is to solve the above problems, in order to perform the reservation recording function by reproducing the accurate time data even if the loss of time data due to power failure is not applied to the system due to a power failure, An object of the present invention is to provide a method of performing a reservation recording function by reproducing a time by obtaining time information from a time and data table among signals received through a digital satellite broadcasting receiver.

That is, when the stand-by power is applied to the system again after the power failure is resolved, the power supply state is switched to the main power on state, and then the existence of the preset recording function is checked. After receiving data from the broadcast receiver, obtaining time information from the received data, resetting the counter for implementing the reserved recording function, and switching the power state to the stand-by state, the scheduled recording function can be normally performed at the reserved time. Make sure

1 is a block diagram showing a schematic configuration of a general digital satellite broadcasting receiving system;

2 is a flowchart illustrating a process of implementing a preset recording recording function when power is re-applied after power failure according to the present invention;

3 is a timing diagram showing a change in power signal according to the operation of the present invention;

<Description of Symbols for Major Parts of Drawings>

10: VCR 20: TV

30: main block 40: MCU

50: memory 31: receiver

32 processor 33 audio signal processor

34: video signal processor 35: power supply unit

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a general configuration of a digital satellite broadcasting receiving system, including a main block 30 for processing a signal received through an antenna, a television 20 as a means for displaying a video signal, and a video signal. A video cartridge recorder (VCR) 10, which is a means for recording or playing back a video, a MCU 40 for assisting in data processing of the main block 30, and data necessary for the operation of the MCU 40. The memory 50 is configured to be included.

The main block 30 is a receiver 31 for receiving data from a satellite, a processor 32 for analyzing and processing a signal received by the receiver 31, and an audio signal applied from the processor 32. The audio signal processor 33 outputs the data to the VCR 10 and the TV 20 by performing data conversion, and the like, and receives a video signal from the processor 32 to process the graphics and the VCR. 10 and a video signal processor 34 output to the TV 20, and a power supply unit 35 to which main power is applied.

2 is a flowchart illustrating a process of implementing a preset recording function when power is re-applied after power failure according to the present invention, in particular, a process when a situation before power failure is in a stand-by state. The first step (S1) to be; A second step (S2) of checking whether a power-on command from a user is input after the first step (S1); A third step S3 of checking whether a predetermined time has elapsed when a power-on command from the user is not input in the second step S2 and repeating the operation of the second step if a predetermined time has not elapsed; ; A fourth step (S4) of turning on the main power when a power-on command is input from the user in the second step (S2) and when a predetermined time elapses in the third step (S3); A fifth step (S5) of checking whether there is a preset reserved recording function after the fourth step and turning off the main power and ending the operation process if the preset reserved recording function does not exist; A sixth step (S6) of receiving a data signal from a satellite if a preset recording function exists in the fifth step (S5); A seventh step S7 of extracting time data from the signal received in the sixth step S6; An eighth step (S8) of calculating a new time value T 'for implementing the reserved recording function using the time data extracted in the seventh step (S7); A ninth step S9 of checking whether the new time value T 'calculated in the eighth step S8 is greater than or equal to zero; A tenth step (S10) of checking whether T 'is zero if the time value T' is greater than or equal to zero in the seventh step (S9); An eleventh step (S11) of resetting the counter by T 'if the time value T' is not 0 in the tenth step (S10); A twelfth step (S12) of turning off the main power after resetting the counter in the eleventh step (S11); A thirteenth step S13 of starting a count operation of the counter reset by the time value T 'in the eleventh step S11; A fourteenth step (S14) of continuously checking whether the reserved time is reserved until the reservation time after the thirteenth step (S13); A fifteenth step (S15) of turning on the power of the main at a reservation time in the fourteenth step (S14); In the tenth step S10, when the T 'is 0 or after the fifteenth step S15, the sixteenth step S16 of recording data received is sequentially performed.

When the new time value T 'is smaller than 0 in the ninth step S9, the processor 32 determines whether to perform the recording function of the reservation program or not.

When the situation before the power failure is the main power on state, the on / off process of the main power is omitted during the above process.

That is, when the stand-by power is re-applied after the power failure in the stand-by state in which the reserved recording function is set and the main power is turned on, the processor 32 of the main block 30 checks whether the scheduled recording function is set or not, and reserves the recording. When the function is set, the MCU 40 notifies that the scheduled recording function is set, receives the data received through the receiver 31, extracts time data, and subtracts the extracted time data and the reserved time stored in the memory 50. Calculate the remaining time T 'by calculating, and if the calculated T' value is 0, the scheduled recording function is executed. If the calculated T 'value is greater than 0, the counter of the MCU 40 is reset by T'. After that, a power off signal is transmitted to the MCU 40. The MCU 40 controls the power applying unit of the main block 30 to turn off the main power supply and start counting. When the recording reservation time is reached based on the count result, the MCU 40 controls the power supply unit of the main block 30 to turn on the main power to apply power to the main block 30, and then to turn on the processor 32. Control to perform scheduled recording function.

Referring to FIG. 3, the user turns on the main power at ⓐ in the stand-by state where the main power is turned off, and then inputs a reservation recording command and related data such as a reservation time and a channel. When the main power is turned off, the counter of the MCU 40 operates with time T at the time point ⓑ when the main power is turned off.

While the counter of the MCU 40 is operated by the time T, if the power is reapplied at the time ⓓ after the stand-by power is turned off due to a power failure at the time ⓒ, the MCU 40 is operated by the user for a predetermined time. The standby state is maintained until the power-on command is input, and then the main power is turned on at the time when the main power-on command is input from the user or after a predetermined time elapses. The operation is from the first step S1 to the fourth step S4.

When the main power is turned on at the time ⓔ, the processor 32 of the main block 30 checks whether there is a preset reserved recording function, and when there is no set reserved recording function, the main power is turned off at the time ⓕ, When there is a recording function, the data received through the receiver 31 is received, and the time data is recovered. The new count time T 'is calculated by the recovered time data, and the counter of the MCU 40 is reset and the MCU ( 40) send a power off command. The operation is from the fifth step S5 to the twelfth step S12.

When the power-off command is input from the processor 32, the MCU 40 turns off the main power at the time point ⓖ, and the counter of the MCU 40 starts counting by the new time value T ', and reserves time by the count result. When the ⓗ time is reached, the main power is turned on by the MCU 40, and when the main power is turned on, the main block 30 receives data from the satellite and performs a recording operation. The operation is from the thirteenth step S13 to the sixteenth step S16.

The above operation is when the power is re-applied after the power failure is before the recording reservation time. If the power failure state is resolved after the time point, for example, the time after the main power is turned on, The processor 32 determines whether to perform the reserved recording function and operates according to the determination result. The operation when the check result T 'of the ninth step (S9) of the above process has a value less than zero.

The technique of the present invention as described above can be applied to use in the case of reproducing time due to power outages in general airwave broadcasting such as TV or radio.

As described above, the present invention needs to use an auxiliary power source to prevent data loss by receiving a video signal from a satellite when power is re-applied after a power failure and restoring time data using the received data to perform a scheduled recording function. There is no effect.

Claims (5)

A main block 30 comprising a receiver 31, a processor 32, an audio signal processor 33, a video signal processor 34, a power supply unit 35, and the like; A TV 20; A VCR 10; MCU 40; In a method of implementing a reservation recording function in a digital satellite broadcasting receiving system including a memory 50, the power supply state is supplied from the MCU 40 when the stand-by power is again applied to the system after the power failure state is solved after the power failure. After switching to the main power-on state, the processor 32 checks whether the preset recording function is present, and if there is a preset recording function, the time information from the data received through the receiver 31 is checked. After resetting the counter to implement the scheduled recording function, switch the power state to the stand-by state, count the counter from the stand-by state to the reserved time, and perform the scheduled recording function at the reserved time. A method of implementing a preset recording function when power is applied again after a power failure. The method of claim 1, wherein if the scheduled recording function does not exist, the processor 32 switches the power state to the stand-by state if the preset recording function does not exist. How to implement the preset scheduled recording function. The method of claim 1, wherein the resetting of the counter for implementing the reserved recording function by obtaining time information from the data received through the receiver 31 comprises extracting the time data from the received data and then storing the time data in the memory 50. Calculating the difference T 'between the reservation time and the extracted time data, and checking the magnitude of the calculated time value T' and resetting the counter by T 'if T' is greater than zero. A method of implementing a preset recording function when power is applied again after a power failure. 4. The method according to claim 3, wherein a scheduled recording function is performed when the time value T 'is zero. 4. The method of claim 3, wherein when the time value T 'is smaller than 0, the processor 32 determines whether to perform the reserved recording function and operates according to the determination result. How to implement the preset scheduled recording function.