KR100664489B1 - A BD recorder and method to record and playback at the same time using it - Google Patents

Abstract

The present invention relates to a BD recorder and a simultaneous recording and reproducing method using the same. The present invention relates to a digital tuner that receives a digital broadcast signal and converts it into an MPEG stream, and converts the MPEG stream into a format that can be stored on a BD disc. A first BD (BD) formatter, a recording / playing unit which alternately performs the operation of recording the MPEG stream on the video disk and the operation of reading the MPEG stream recorded on the video disk for both recording and playback; A second BD formatter for restoring the MPEG stream read by the recording / reproducing unit to the pre-conversion format, the MPEG stream transmitted from the first video formatter to the recording / reproducing unit, and the recording / reproducing unit to the second video formatter. Multiplexer that controls the flow of transmitted MPEG streams, and decompressed restored MPEG streams to decode video signals and audio. It includes arcs eyibeuyi conversion (A / V) decoder and, and an output section for outputting the video signal and the audio signal.

Description

Video recorder and method for simultaneous recording and playback using it {A BD recorder and method to record and playback at the same time using it}

1 is a block diagram showing the configuration of a BD recorder according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a simultaneous recording and reproducing method using the BD recorder of FIG. 1.

* Description of the symbols for the main functions of the drawings *

11: Digital tuner 12: HDD

13: BD drive 14: multiplexer

15: A / V decoder 16: control unit

17: User interface 18: A / V signal playback section

19; output unit 21; BD formatter for recording

22: BD formatter for playback

The present invention relates to a video recorder and a simultaneous recording and reproducing method using the same, and more particularly, to a video recorder and a simultaneous recording and reproducing method using the same can be performed simultaneously with the recording and playback operations.

Recently, a DVD recorder is widely used in place of a video tape recorder, a CD recorder, and the like as a device for recording a television broadcast or a recorded image. Conventional DVD recorders include an A / V encoder module and an A / V decoder module for encoding or decoding an input video and audio signal in MPEG format, as disclosed in Korean Patent Laid-Open Publication No. 2003-0067248, and HDDs which are mass storage media. Loader engine comprising a hard disk drive and a DVD drive, and a microprocessor for controlling the respective devices. Such a DVD recorder stores video and audio signals input through an input terminal in a recording mode on an HDD or a DVD disc, and displays the contents stored on the DVD disc on a display device such as a TV according to a user's playback command.

The main reason for the recent widespread use of such DVD recorders is that DVD discs mounted on DVD recorders have a higher amount of video and audio with better image quality and sound quality than conventional storage media such as video tape or compact disc (CD). This is because data can be stored.

However, such a DVD disc also lacks a storage space for recording high quality digital images, and a new storage medium suitable for storing high quality images is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described needs, and an object of the present invention is to provide a BD recorder capable of storing a high-definition image by mounting a BD disc having a larger storage space than a conventional DVD disc.

Another object of the present invention is to provide a BD recorder capable of simultaneously performing a recording operation and a reproduction operation, and a simultaneous recording and reproduction method using the same.

According to an aspect of the present invention, there is provided a digital tuner for receiving a digital broadcast signal and converting it into an MPEG stream, a first BD formatter for converting the MPEG stream into a format that can be stored on a BD disc; A recording / reproducing unit which alternately records the MPEG stream on the video disk and reads the MPEG stream recorded on the video disk to perform recording and playback, and the MPEG stream read by the recording / playing section. A second BD formatter for restoring a pre-conversion format, an MPEG stream transmitted from the first video formatter to the recording and playback section, and an MPEG stream transmitted from the recording and playback section to the second video formatter; A multiplexer, an AV decoder that decompresses the recovered MPEG stream and converts it into a video signal and an audio signal; And an output unit for outputting the video signal and the audio signal.

The recording and reproducing unit may record and reproduce the MPEG stream stored in the video disk while transmitting the MPEG stream transmitted from the first video formatter to the second disk formatter, and transmit the recorded data to the second video formatter. do.

In the simultaneous recording and reproducing method of a video recorder, a digital broadcast signal is received and converted into an MPEG stream, the MPEG stream is converted into a format that can be stored on a BD disk, and then the transport flow is controlled to be converted. While recording an MPEG stream on the video disk, the MPEG stream stored in the video disk is read and transmitted to perform recording and playback.

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Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a BD (Blu-ray Disk) recorder according to an embodiment of the present invention includes a digital tuner 11, a recording BD formatter 21, and a hard disk drive (HDD) ( 12), BD drive 13, playback BD formatter 22, multiplexer 14, A / V decoder 15, control unit 16, and A / V signal playback unit ( 18, a user interface 17, and an output unit 19.

The digital tuner 11 receives a digital broadcast signal (for example, an ATSC (Advanced Television system committee) signal) of a channel set by a user and converts it into an MPEG2 transport stream. The recording BD formatter 21 converts the MPEG2 transport stream into a format suitable for storing on a BD disc, or carries an additional signal (for example, an encryption protection signal) on the MPEG2 transport stream.

The BD drive 13 mounts a BD disc to store the MPEG2 transport stream transmitted from the recording BD formatter 21, or reads the MPEG2 transport stream stored on the BD disc and transfers it to the BD formatter 22 for reproduction. In the recording / playback mode, the BD drive 13 can read the MPEG2 transport stream stored on the BD disc while recording the MPEG2 transport stream transmitted from the recording BD formatter 21. For example, when the user wants to watch the first title already stored while recording the second title on the BD disc, the BD drive 13 reads the MPEG2 transport stream in the area where the first title is stored and forms the second title. The transport stream may be recorded in an area different from the area in which the first title is stored. In the recording / playback mode, the BD drive 13 alternately performs recording and reading operations. In order for the recording and reading to proceed smoothly, the BD drive 13 has a predetermined speed (for example, 4 times speed) or more. desirable.

 The playback BD formatter 22 removes the additional signal from the MPEG2 transport stream read from the BD drive 13 or stored on the HDD 12, and restores it to the format before being converted by the recording BD formatter 21. Let's do it. The multiplexer 14 acts as a switch and controls the flow of signals according to the operation mode of the BD recorder. That is, if the BD recorder is in the recording mode, the MPEG2 transport stream is transmitted from the recording BD formatter 21 to the HDD 12 or the BD drive 13, and if the BD recorder is in the playback mode, the HDD 12 or the BD drive is reversed. In (13), the MPEG2 transport stream flows to the BD formatter 22 for reproduction. In addition, in the recording / playback mode, the HDD 12 or the BD drive 13 while transmitting the MPEG2 transport stream from the recording BD formatter 21 to the HDD 12 or the BD drive 13 to simultaneously perform recording and playback operations. The MPEG2 transport stream also flows to the BD formatter 22 for playback.

The A / V decoder 15 decompresses the MPEG2 transport stream delivered from the playback BD formatter 22 and converts it into a video signal (for example, a composite signal, a component signal, etc.) and an audio signal.

The A / V signal reproducing unit 18 converts the video signal and the audio signal transmitted from the A / V decoder 15 to be displayed on a display device such as a TV (not shown). For example, if the display device displays an NTSC-type TV signal, the A / V signal reproducing unit 18 converts the video signal transmitted from the A / V decoder 15 to meet the NTSC standard, thereby changing the output unit 19. After sending to TV. However, when the display device is a digital TV, the video signal and the audio signal output from the A / V decoder 15 are directly output to the digital TV without going through the A / V signal reproducing unit 18.

2, a simultaneous recording and reproducing method of a BD recorder according to an embodiment of the present invention will be described. When the user inputs an operation command of the BD recorder using a remote controller (not shown) or the like, the controller 16 determines whether the BD recorder is in a recording mode (30). If it is in the recording mode, the multiplexer 14 causes the MPEG2 transport stream to flow only from the recording BD formatter 21 to the HDD 12 or the BD drive 13.

 Accordingly, the digital broadcast signal received by the digital tuner 11 is converted into an MPEG2 transport stream and transferred to the recording BD formatter 21 (32), and the MPEG2 transport stream whose format is converted by the recording BD formatter 21 is converted. Is stored in the HDD 12 or the BD disc (34). While performing the recording operation as described above, it is determined whether the recording is finished (36). If the recording is finished, the cycle ends, and if the recording is not finished, the process returns to step 32.

On the other hand, if it is not in the recording mode in step 30 it is determined whether the BD recorder is in the playback mode (38). In the playback mode, the multiplexer 14 causes the MPEG2 transport stream to flow only from the HDD 12 or the BD drive 13 to the playback BD formatter 22.

 Therefore, the MPEG2 transport stream read and transmitted from the HDD 12 or the BD drive 13 is restored to the previous format by the playback BD formatter 22 and transferred to the A / V decoder 15 (40). The V decoder 15 decompresses the MPEG2 transport stream into video and audio signals. The video and audio signals are displayed on a display device such as a TV via the A / V signal reproducing unit 18 and the output unit 19 (42). While performing the reproducing operation as described above, it is judged whether or not the reproduction is completed (44). When the reproduction is completed, the cycle ends, and when the reproduction is not completed, the process returns to step 40.

On the other hand, if it is not in the playback mode in step 38, it is determined whether the BD recorder is in the recording playback mode. The recording / playback mode is a mode in which recording and playback operations are simultaneously performed on a BD recorder, while recording digital broadcast signals of a channel selected by a user and simultaneously playing video and audio data that the user wants to play among video and audio data stored on a BD disc. .

For this purpose, the multiplexer 14 includes an MPEG2 transport stream that flows from the recording BD formatter 21 to the HDD 12 or the BD drive 13 and the BD formatter 22 for playback on the HDD 12 or the BD drive 13. MPEG2 transport streams flowing in the loop are alternately flowed. As a result, in the recording and playback mode, the above-described recording modes 30 to 34 and the reproduction modes 38 to 42 are simultaneously performed, and the HDD 12 or the BD drive 13 alternately performs recording and reading operations (48). ). At this time, if the recording and reading time of the HDD 12 and the BD drive 13 is shortened, desired video and audio data can be recorded on the BD disc without any interruption of the displayed image. In this manner, while the recording and playback mode is performed, it is determined whether the recording and playback is completed (50). If the recording and playback is finished, the cycle ends, and if the recording and playback is not finished, the process returns to step 48.

As described in detail above, the present invention can store more information on one disc by storing a high quality image on a BD disc having a larger storage capacity than a conventional DVD disc.

In addition, the present invention can simultaneously record and play, so that the user can record the necessary content while watching a video of other content irrelevant to the recorded content.

Claims (5)

A digital tuner that receives a digital broadcast signal and converts it into an MPEG stream; A first BD formatter for converting the MPEG stream into a format that can be stored on a BD disk; A recording and reproducing unit for alternately performing the operation of recording the MPEG stream on the video disk and the operation of reading the MPEG stream recorded on the video disk for both recording and playback; A second video (BD) formatter for restoring the MPEG stream read by the recording / playback unit to a pre-conversion format; A multiplexer for controlling the flow of an MPEG stream transmitted from the first video formatter to the recording and playback unit and an MPEG stream transmitted from the recording and playback unit to the second video formatter; An A / V decoder which decompresses the recovered MPEG stream and converts it into a video signal and an audio signal, and And a video output unit for outputting the video signal and the audio signal. The recording and playback section of claim 1, wherein And record and play the MPEG stream stored in the video disk by transmitting the MPEG stream transmitted from the first video formatter to the video disk, and transmitting the MPEG stream stored in the video disk to the second video formatter. delete delete In the simultaneous recording and playback method of the video recorder, After receiving the digital broadcast signal and converting the MPEG stream into a format that can be stored on the BD disk, and then controlling the flow of the transport to record the converted MPEG stream on the video disk, Simultaneous recording and reproducing method of a video recorder to read and transmit the MPEG stream stored in the video disk to perform recording and playback together.

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