KR20030080489A - Method for recording and recovering recorded broadcast program - Google Patents

Abstract

PURPOSE: A method for storing and recovering a recorded program is provided to recover data received from the beginning of a cluster having an error to the beginning of the error in a new video clip, thereby continuing the recording of a program from the error generated point instead of beginning the program. CONSTITUTION: A method for storing and recovering a recorded program includes the steps of controlling the operations of respective parts of an HDTV to receive broadcasting signals in response to power-on of the HDTV(S200,S202), checking a channel selection input by a user and displaying a broadcasting program of the selected channel(S204,S206), and recording a program data by cluster unit in response to a recording request of the user(S208,S212). If any errors are generated during the recording, clusters of the errors are detected(S216,S218). A microprocessor of the HDTV detects data positions when the errors are generated in the clusters(S220), and produces and stores new clips for program data received from the beginning of the erroneous clusters and the beginning of the error generation(S222), thereby recovering the erroneous clusters.

Description

How to save and restore recorded programs {METHOD FOR RECORDING AND RECOVERING RECORDED BROADCAST PROGRAM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital video recording / reproducing apparatus, and more particularly, to a method for storing and restoring a recorded program in error during recording.

In today's digital era, the convergence of communication, computer, and broadcasting is accelerating due to the spread of media using the compression method. The development of digital television receivers is actively underway. The digital television receiver is an example of a digital video recording / reproducing apparatus, and is not only data compatible with a DVD, a digital camcorder, a digital VCR, etc., which processes a digital signal including a computer, but also includes a channel, a program name, It is also possible to provide various user-specific additional information such as electronic program guide (EPG) information including broadcasting schedule information of the entire channel such as transponder number, broadcasting time, title, category, and the like.

In addition, unlike conventional analog television receivers, digital television receivers have a random access storage device such as a hard disk, so that a user can record a desired program and play it back at a desired time. Also support to make it possible.

That is, in a digital video recording / reproducing apparatus such as a digital television receiver, a video signal such as a TV or a video signal can be converted into a digital data format such as MPEG2, and stored and reproduced on a recording medium such as a hard disk. At this time, the digitally converted file is managed as a cluster, which is a basic unit for recording on a hard disk. Unlike a PC for data storage and restoration, which requires detailed handling of stored data, a digital video recording / reproducing apparatus is used for its purpose. Larger clusters are more efficient and easier to manage video clips. Therefore, the digital video recording / reproducing apparatus manages the amount of data capable of storing the transport stream for about 5 minutes as a single file unit. In a currently applied system, the minimum cluster size is set to about 120 MB.

However, in the digital video recording / reproducing apparatus, as described above, if an error occurs due to a cause such as a power failure during recording due to the large cluster unit, there is no conventional method for restoring the cluster in which the error has occurred. The data of the cluster that was received before the error also becomes unusable, and the program data must be retransmitted from the beginning. As described above, in a digital video recording / reproducing apparatus that sets a large amount of data of the cluster, There was a problem that more time is wasted on data retransmission.

Accordingly, an object of the present invention is to provide a method for storing and restoring a recorded program that can minimize damage to a program file being recorded even when an error occurs due to a cause such as a power failure during recording in a digital video recording / reproducing apparatus. .

In order to achieve the above object, the present invention provides a method of storing and restoring a recorded program in a digital video recording / reproducing apparatus, the method comprising: (a) recording a corresponding program when a recording request is made for a specific broadcast program by a user; Making a step; (b) detecting an errored cluster when an error occurs during recording of the program; (c) detecting the exact data location where the error in the cluster occurred; and (d) restoring the cluster in which the error occurred by generating the program data received from the start time of the clister to the time when the error occurred as a new clip.

1 is a block diagram of an HDTV receiver as an example of a digital video recording / playback apparatus according to an embodiment of the present invention;

2 is an operation control flowchart for storing and restoring a recorded program according to an embodiment of the present invention;

3 is a conceptual diagram illustrating processing for storing and restoring a cluster in which an error occurs during a recording process according to an exemplary embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the preferred embodiment according to the present invention.

1 is a block diagram of an HDTV receiver, which is an example of a digital video recording / reproducing apparatus, and illustrates a block diagram of an HDTV receiver having a hard disk drive (HDD) that is one of random access storage devices. Referring to FIG. 1, the tuner 100 inputs a broadcast signal received through an antenna ANT and selects an RF channel under the control of the microprocessor 110. Accordingly, the tuner 100 outputs an IF (Intermediate Frequency) signal according to the channel, and is converted into a baseband signal by the IF module 102 and output to the channel decoder 104.

The channel decoder 104 reproduces the data bit stream by channel decoding the baseband signal input from the IF module 102. The TS (Transport Stream) decoder 106 separates audio data, video data and additional data from the data bit string reproduced by the channel decoder 104. The TS decoder 106 separates the audio data and the video data of the program selected by the microprocessor 110 among the programs received through the RF channel, and then the A / V decoder 114. ) Audio data and video data input to the A / V decoder 114 are decoded and output according to the MPEG standard, respectively, and are processed by the A / V processing and output unit (not shown), and then externally Is output. The random access storage device 108 records and stores the A / V data input from the TS decoder 106 on the hard disk surface of the recording medium under the control of the microprocessor 110, and reads out the stored A / V data. Output to A / V decoder 114.

The microprocessor 110 is connected to a keypad 116 and an IR receiver 120 through a user interface 118. The microprocessor 110 performs an operation according to a command input from the IR remote 122 through the keypad 116 or the IR receiver 120 according to a program stored in the memory 112. The IR remote 122 may be a wireless mouse such as an air mouse or a remote controller (REMOCOM). The command applied from the IR remote 122 is received by the IR receiver 120 as an IR signal and applied to the microprocessor 110 through the user interface 118. The microprocessor 110 receives additional data from the TS decoder 106, and the additional data includes the aforementioned EPG information.

The memory unit 112 may include a read only memory (ROM) for storing a control program of the microprocessor 110 and a RAM for temporarily storing data generated according to program execution of the microprocessor 110. Random Access Memory (EEPROM), and EEPROM (Electrically Erasable and Programmable ROM) for storing various reference data.

2 is a flowchart illustrating an operation control for storing and restoring a recorded program during a power failure according to an exemplary embodiment of the present invention. Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. In the following description, an operation of an HDTV receiver having a recording medium such as a hard disk capable of recording a broadcast program, which is an example of a digital video recording / reproducing apparatus, will be described as an example.

First, when the user "turns on" the power of the HDTV receiver, the HDTV receiver microprocessor 110 proceeds to step S202 in response to this in step S200 to control the operation of each part of the HDTV to receive a broadcast signal received from a broadcasting station. Start receiving.

Accordingly, the user can watch various broadcast programs received from the broadcasting station through the HDTV receiver, and can select a desired broadcast program through channel selection. That is, the microprocessor 110 of the HDTV receiver checks a user's channel selection input in step S204, and if there is a channel selection from the user, broadcasts a broadcast program of the corresponding broadcasting station received through the selected channel in step S206. It is displayed on the receiver screen so that a user can watch a desired broadcast program.

In this case, the user may record the desired program using a recording medium such as a hard disk provided in the HDTV receiver. That is, when there is a recording request for the broadcast program currently being viewed by the user, the microprocessor 110 proceeds to step S212 in response to the recording request from the user in step S208, and the corresponding program data requested by the user in cluster units. Recording is made to the recording medium. Unlike the PC which stores data in cluster units of a small data amount for fine control of the data as described above, the broadcast program data is a cluster unit of a relatively large data amount capable of storing a transport stream of about 3 Mbps for about 5 minutes. Is stored in the recording medium.

Meanwhile, in the recording, the recording of the corresponding program may be completed without any error, and an error may occur due to a cause such as a power failure, and thus recording may not be normally performed. As described above, it is impossible to restore the cluster in which the error has occurred, and thus recording has to be performed again from the beginning.

That is, if no error occurs in the recording process for the recording-required program, the microprocessor 110 repeatedly records (S212) to (S214) while recording the corresponding program until the recording is completed. Will run normally.

In contrast, when an error occurs due to a cause such as a power failure during recording, the microprocessor 110 detects a cluster in which the error occurs in step S218 in response to this in step S216. In operation S220, the microprocessor 110 detects a data position of the point in time at which the error occurred in the cluster where the error occurred, and in step S222, the program data received from the start point of the cluster to the time point at which the error occurred. By creating and saving a new clip, the errored cluster is restored.

FIG. 3 illustrates a conceptual diagram of restoring a cluster in which an error occurs when an error occurs in the recording process of FIG. 2. That is, when the recording is stopped due to an error in cluster # 3 as shown in (a) of FIG. 3, the microprocessor 110 of the present invention generates the error as shown in (b) of FIG. 3. The cluster # 3 is created, saved, and restored as a new video clip using only the data received up to the point where the error occurred, and then recording is performed again. Therefore, it is possible to perform recording again by receiving only the data after the time of the error without receiving the entire data of the cluster in which the error occurred during the recording from the beginning.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the invention should be determined by the claims rather than by the described embodiments.

As described above, in the present invention, when an error occurs due to a cause such as a power failure while recording specific broadcast program data on a recording medium in the digital video recording / reproducing apparatus, the error occurs from the start point of the cluster where the error occurs. By restoring the data received up to the point of occurrence into a new video clip, it is possible to perform recording again by receiving only the data after the point of error, without having to receive the entire data about the cluster in which the error occurred during recording from the beginning. There is an advantage.

Claims (3)

A method of storing and restoring a recorded program in a digital video recording / playback apparatus, (a) performing a recording of a corresponding program when there is a recording request for a specific broadcast program by the user; (b) detecting an errored cluster when an error occurs during recording of the program; (c) detecting the exact data location where the error in the cluster occurred; (d) generating the program data received from the start time of the clister to the time when the error occurs as a new clip and restoring the cluster in which the error occurred; storing and restoring a recorded program in the digital video recording / reproducing apparatus . The method of claim 1, After the step (d), (e) if the recording of the program is required again, storing the program data in the cluster unit again from the point where the error occurs; Digital video recording / characterized in that it further comprises How to save and restore recorded programs on the playback device. The method of claim 1, The broadcast program data is stored and restored in the digital video recording / reproducing apparatus, characterized in that stored in the cluster unit of a predetermined amount of data.