KR100690887B1 - Digital video recorder with additional storage - Google Patents

Abstract

The present invention relates to a digital video recorder incorporating an additional storage device that makes it easy to implement additional functions such as quick view, slow view, and search by adopting a hard disk as a secondary storage device in a digital video recorder.

An object of the present invention is to provide a broadcast receiver for receiving digital data, a decoder for decoding the received digital data into a recordable signal, and a decoded signal on a first recording medium or a first recording medium. A control unit which controls to record on the second recording medium by a recording method, a first recording unit which records the decoded signal on the first recording medium under the control of the controller, and the control unit controls the decoded signal by the control of the controller. 2 is achieved by a second recording section for recording on a recording medium.

Description

DIGITAL VIDEO RECODER BUILT IN ADDITIONAL MEMORY APPARATUS}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exemplary block diagram of an additional device of a digital video recorder incorporating an additional storage device according to the present invention.

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

10: recording / reproducing system 11: DVHS tape

12: data converter 13: error correction processing unit

14: format processing unit 20: broadcast receiving processing unit

21: broadcast receiver 22: TP decoder

23: video decoder 24: audio decoder

25: video display processor 26: MPEG encoder

30: hard disk 31: high-speed serial interface

32: PC 41: display device

42: analog monitor

The present invention relates to a technology for implementing additional functions in a digital video recorder, and in particular, by adopting a hard disk as a secondary storage device in a DVHS (Digital VHS) VR, it is possible to easily implement additional functions such as quick view, slow view, and search. The present invention relates to a digital video recorder having an additional storage device.

In general, a digital VCD (eg, a DVHS VCD) digitizes a video signal input from various signal sources and records it on a tape, or outputs it to various information devices such as an external editor, a workstation, or a personal computer, for various editing or It is a high quality digital video and audio processing device that enables high performance. In addition, the DVHS VRC is a device that is expected to play a pivotal role in the next generation of multimedia devices, such as being used in conjunction with a broadcast satellite, high-definition TV (HDTV) or a set-top box.

However, unlike the DVD player which can take advantage of the disk and quickly go to the desired position by looking at the table of contents, the DVHS V-CAL does not provide a screen for program search because the magnetic tape is used as a storage medium. The disadvantage is that the target position must be moved based on the data recorded in the code area.

According to the DVHS standard, packetized digital data is stored on a tape, and functions such as fast viewing, slow viewing, and retrieval cannot be implemented due to characteristics such as the angle of the head and the moving speed of the tape. .

As described above, in the conventional digital VR, there is a defect that cannot provide additional functions such as quick viewing, slow viewing, and searching due to characteristics such as data recording format and moving speed of the angular tape of the head.

Accordingly, an object of the present invention is to provide a digital video recorder incorporating an additional storage device which adopts a hard disk as a secondary storage device and provides additional functions such as quick viewing, slow viewing, and searching using the hard disk.

The digital video recorder incorporating the additional storage device according to the present invention includes a broadcast receiving unit for receiving digital data, a decoder unit for decoding the received digital data into a recordable signal, the decoded signal on a first recording medium or A control unit which controls to record on the second recording medium by a recording method different from that of the first recording medium, a first recording unit which records the decoded signal on the first recording medium under the control of the controller, and the decoded signal And a second recording unit for recording on a second recording medium under the control of the control unit.

Hereinafter, described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of a digital VRA having additional storage device for achieving the object of the present invention. As shown in FIG. A recording / reproducing system 10 which reads and outputs data in the form of TP packets after error correction and format processing, or receives and stores data; A broadcast reception processing unit (20) for processing a TP packet input from the recording / reproducing system (10) or a broadcast TP packet which has been processed to be suitable for display on an external display device; The broadcasting / receiving processing unit 20 stores the output data of the recording / reproducing system 10 or the broadcasting receiving processing unit 20 and performs the additional functions such as quick viewing, slow viewing, and searching. It was configured as a hard disk 30 to be output to the side, or output to the PC 32 so that the editing function and the like can be performed.

The recording / reproducing system 10 includes a data converter 12 for converting data to be stored in the DVHS tape 11 into an analog signal or converting an analog signal reproduced and outputted from the DVHS into a digital signal; An error correction processor (13) for error correction (ECC) of data output from the data converter (12); A format processing unit (14) for formatting the error correction processed DVHS standard data in the form of TP packets; In order to control the operation of each unit in the recording / reproducing system 10 and to store additional functions, output data of the recording / reproducing system 10 or the broadcast receiving processing unit 20 is stored in the hard disk 30. Or an operation control unit 15 for reading out already stored data.

The broadcast receiving processor 20 selects and decodes a TP packet of a desired channel from one or more channels of TP packets output from the format processor 14 or the broadcast receiving unit 21 and decodes it into an ES or PES form. (22); A video decoder (23) for receiving the ES or PES type data from the TP decoder (22) and decompressing the data; An audio decoder 24 for receiving ES or PES type data from the TP decoder 22 and restoring the original type audio data; A video display processor (25) which receives image data from the video decoder (23) and processes it to be suitable for display on a display device (41); The video encoder 26 is configured as a video encoder 26 for compressing data output from the video display processor 25 into a predetermined format (eg, MPEG2) and storing the data on the hard disk 30.

Referring to the operation of the present invention configured in this way in detail as follows.

In the reproduction mode, the analog signal recorded on the DVHS tape 11 is converted into a digital signal through the data converter 12 by the control of the arithmetic control unit 15, and the error correction processing unit 13 converts the A / D. Error correction code (ECC) is processed on the data.

In addition, the format processing unit 14 compresses the data of the DVHS standard subjected to the error correction process, divides and multiplexes the data in packet units, and outputs the data in the form of TP packets to the TP decoder 22.

On the other hand, the broadcast receiving unit 21 receives and processes a broadcast signal and outputs TP packet data to the TP decoder 22. The TP decoder 22 controls the format processor unit under the control of the operation control unit 15. The TP packet output from 14 or the TP packet output from the broadcast receiver 21 is selected and decoded into an ES or PES format.

At this time, the video decoder 23 receives the ES or PES type data from the TP decoder 22 and decompresses the video data, and the audio decoder 24 receives the ES or PES type data and receives the original type. Restore audio data.

The video display processor 25 receives the decompressed image data from the video decoder 23 and converts the decompressed image data into a form suitable for display and outputs it to the display device 41 such as a digital TV.

Accordingly, the user can select and watch a program to be reproduced through the format processor 14 or a broadcast program received through the broadcast receiver 21 by selecting a corresponding mode.

On the other hand, using the hard disk 30 will be described for each process for performing additional functions, such as quick view, slow view, search.

The arithmetic and control unit 15 may output a playback signal through the format processor 14 or a broadcast reception signal through the TP decoder 22 or a video signal or MPEG encoder 26 through the video display processor 25 according to a user's request. The compressed video signal is recorded on the hard disk 30 and the data is reproduced if necessary to perform the corresponding additional function.

For example, a process for reproducing a part of a program from the DVHS tape 11 and performing a reverse look-up function will be described. When reproducing a program from the DVHS tape 11, If a certain length packet is stored in the hard disk 30 at a time interval, and the user selects the reverse view function, the display device 41 reads the contents stored in the hard disk 30 in the corresponding direction and speed. Output to the

The process for performing the slow viewing function will be described. The data of the same program stored in the hard disk 30 is slowly read out while the program is played back at the normal speed from the DVHS tape 11 without being displayed. It is displayed on the display device 41.

In this state, when the user presses the play button, the driving position of the current DVHS tape 11 is ahead of the display position. Therefore, the contents stored in the hard disk 30 are output at high speed, and the driving position of the current DVHS tape 11 When they match, the program played on the tape 11 is displayed on the display device 41.

Referring to the processing for performing the search function, the hard disk 30 with position information along with a TP packet of a predetermined length at a predetermined time interval during recording on the DVHS tape 11 under the control of the operation control unit 15. If the search request command is input, the packet is read from the hard disk 30 and output to the display device 41 through the video decoder 23 and the video display processor 25.

Therefore, the user can view the program at regular time intervals among the entire contents, thereby completing the search within a short time. When the user presses the play button when the desired screen is displayed while performing the search operation as described above, the play is started by driving to the desired position on the DVHS tape 11 based on the stored position information.

In describing the process for performing the DVHS title function, when a DVHS title is produced, a table of contents and a preview, packet data, and location information are stored at the beginning of the DVHS tape 11 so that the user can quickly obtain the desired information. The title information is stored in the hard disk 30, and when the user requests it, the content is read out and displayed on the display device 41.

The process for applying the search function to the DVHS tape recorded in another DVHS system will be described. As the tape recorded in another DVHS system has no information stored in the hard disk 30 in summary, the tape as described above. By storing the constant data in the hard disk 30 at regular time intervals during the reproduction processing, the same can be used as the DVHS tape 11 later.

)를 그대로 상기 하드 디스크(30)에 저장해 두었다가 사용할 수 있다. 또한, 필요에 따라 상기 소오스 데이터(

)를 MPEG 엔코더(26)를 통해 압축하여 저장함으로써 동일한 조건에서 보다 더 많은 용량의 프로그램들을 저장할 수 있게 된다.In order to record and store more programs by overcoming the limitation of the storage capacity of the DVHS tape 11, the source data output from the video display processor 25 (

) Can be stored in the hard disk 30 as it is and used. In addition, the source data (

By compressing and storing through the MPEG encoder 26 it is possible to store more programs than the same conditions.

By outputting the data output from the video display processor 25 through the NTSC encoder 27, it is possible to enjoy the DVHS program through the existing analog monitor 42.

On the other hand, when the DVHS program stored in the hard disk 30 is to be edited using the PC 32, the operation control unit 15 stores the corresponding data stored in the hard disk 30 according to a user's request. Is read and supplied to the PC 32 through the high speed serial interface 31.

As described in detail above, the present invention allows a hard disk to be used as a secondary storage device in a DVHS system to provide additional functions such as quick view, slow view, search, and the like. This has the effect of providing functionality.

Claims (8)

A broadcast receiver for receiving digital data; A decoder which decodes the received digital data into a recordable signal; A controller for controlling the decoded signal to be recorded on the first recording medium or on the second recording medium by a recording method different from that of the first recording medium; A first recording unit which records the decoded signal on a first recording medium under control of the controller; And a second recording unit for recording the decoded signal on a second recording medium under the control of the controller. The digital video recorder with a built-in storage device of claim 1, wherein the first recording medium is a DVHS tape. The digital video recorder with a built-in additional storage device of claim 1, wherein the second recording medium is a hard disk. The digital video recorder with an additional storage device according to claim 1, further comprising a display device for outputting a signal recorded on the first recording medium or the second recording medium. delete delete delete delete

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