KR0166873B1 - Index record search device and method in dvcr - Google Patents

Abstract

The apparatus and method for index recording / searching of DVCR according to the present invention is to easily find a desired program from a user's point of view when several programs such as a music video are recorded on one tape.

According to the present invention, if the user wants to see the position that he saw before the index search, the user loads the position using the time code when inserting the tape and then enters the playback mode.

When editing Edit, it always records new index information at the front of the program and then ejects and detects the index information at the position, so the user can find the index information at any position on the tape.

Description

Apparatus and method for index recording / searching of DVCR

1 is a block diagram of a first embodiment of an index recording / searching apparatus of a conventional DVCR.

2 is a program display explanatory diagram of a second embodiment of an index search apparatus of a conventional DVCR.

3 is a diagram of a third embodiment of a conventional index recording method of DVCR.

4 is a block diagram of a DVCR index recording / searching apparatus according to the present invention.

5a to c are views showing the position of the index related information according to the present invention.

6 is a diagram for explaining an index recording / searching method of a DVCR according to the present invention;

7 is a flowchart of an index recording method of a DVCR according to the present invention.

8 is a flowchart of an index search method of a DVCR according to the present invention.

* Explanation of symbols for main parts of the drawings

10, 27: Interface section 11, 14, 24, 26: Error correction

12: interleaving unit 13: multiplexer unit

15, 23: ID portion 16: modulation portion

17: parallel / serial conversion unit 20: data recovery unit

21: synchronization detection unit 22: demodulation unit

25: deinterleaving unit 30: key input unit

31: system control unit 32: microcomputer

33: OSD unit 34: memory control unit

35: index REC section 36: index PB section

37: program number generator 39: program number detector

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DVCR (Digital VCR), and to an index recording / searching apparatus and method for recording an index data at the beginning of a program when index data is recorded, to prevent overwriting and to search the index data at any position. It is about. Index Search means that if there are several programs recorded on the tape, the contents of these programs are displayed on the screen, and the user can select the program to be reported. This is the function to play the tape after moving it.

A normal VCR performs pulse width modulation of a control signal in response to an index signal indicating the start position of each program recorded on a magnetic tape, and searches for a recorded program using the modulated control signal and the index signal.

In this way, the user enters the playback mode by determining how many indexes should be moved forward or backward in order to display a desired program among the searched recorded programs.

As the index search function, a video index search system (VISS) using only an index signal or a video address search system (VASS) used by an address signal indicating an absolute address of a tape added to the above index signal is generally used. Hereinafter, an index recording / searching apparatus of a conventional DVCR will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram of a first embodiment of an index recording / searching apparatus of a conventional DVCR, which is called a cassette memory attached by attaching a nonvolatile memory to a cassette without recording index information at a certain position on a tape. Store index information in

That is, the cassette memory (non-volatile memory) 109 is installed at a constant position of the cassette 101 to record index information, and the supply side reel 104 and the winding side reel 105 of the cassette 101 are respectively provided. A control signal recording / reproducing section 112 for reproducing the control signal of the cassette tape 102 and recording the control signal through the rotation speed detectors 106 and 107 and the control head 108 for detecting the rotation speed, and The SRAM 15 temporarily stores the index information so that the index information, which has index information at the time of ejection, can be sent to the cassette memory 109 at the time of ejection, and recording of the index information by an external key signal. And a microcomputer 111 for controlling playback.

Here, reference numeral 113 denotes a tape drive unit, 114 denotes a key input unit, 119 denotes a system controller, 118 denotes a reel motor, 117 denotes a video signal processor, 116 denotes an OSD, and 103 denotes a rotating drum.

The operation description of the index recording / searching apparatus of the conventional DVCR configured as above is as follows. That is, until the cassette is ejected at the time of recording, the microcomputer 111 records the index information in the SRAM 115, and the index information held in the SRAM 115 at the ejector is stored in the cassette memory ( 109). When the index information contained in each cassette memory 109 is reproduced, the microcomputer 111 reads the index information stored in the cassette memory and stores the index information in the SRAM 115 so that the user can recognize the index information. When the display is displayed on the screen through the OSD unit 116 and the user selects a desired program, the remaining amount is checked by the signal input from the rotational speed detectors 106 and 107 to find the position of the selected program.

2 is a diagram illustrating display of a program for a second embodiment of an index search apparatus of a conventional DVCR, which is obtained by displaying a video signal and index information on a PIP screen. It stores the video signal of one screen unit in memory whenever an index signal is detected during normal playback mode, and displays the video signal received by the VCR's built-in tuner on the main screen and the video screen stored in the memory in index search mode. do. When the index search mode is set, the duty ratio of the control signal is changed by the contents of the index data, and the start of each program is instructed. That is, the index signal is detected by the control head, so that the tape is REW or FF by a certain amount each time the index signal is detected, and is controlled to run in the normal mode to reproduce the recorded program. FIG. 3 is a diagram of a third embodiment of the index recording method of the conventional DVCR. The index information is written along the side information area 304 on the tape. When performing the index information, the data in the information signal area 303 is left as it is and the index information is rewritten in the auxiliary information area 304.

Here, reference numeral 301 denotes a magnetic tape, 302 denotes a track, 305 denotes a header region, and 306 denotes a positioning signal.

However, in the above-described conventional DVCR index recording / search apparatus and method, a memory is attached to a cassette, the index information is recorded there, and the index information is read during playback to use the cassette memory during index search. The remaining amount and index search of are possible but are not accurate and can lead to errors. In addition, the received video signal and the index information are displayed on the PIP screen, and during index search, a video signal of one screen should be stored in the memory whenever the index signal is detected during the normal playback mode. After recording several programs, a general playback must be performed from the beginning to the end, and a problem arises in that this operation must be repeated whenever the editing is modified. In addition, in the case of index recording for storing the index information on the tape, there is a problem that the overwriting on the video data occurs when the index information area is not recorded correctly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and when the user wants to edit the index information during program recording or playback, the tape is recorded at the front of the program at the current position without recording the index information on a large portion of the tape. It is an object of the present invention to provide a DVCR index recording / searching apparatus and a method for finding index information at any position.

The DVCR index recording / searching apparatus of the present invention achieves the above object by converting an external signal to DVCR during recording, and a video taper processing unit for error prevention, and restoring the data and clock on the tape during playback to synchronize the synchronization signal. A data detector for detecting a signal, a first data processor for processing an error using demodulation and position information of the data output from the data detector, input means for controlling a system according to a user selection input, and control of the input means. A microcomputer for controlling OSD control and index recording and reproducing control signals according to an input, and a memory control unit below; a memory unit for inputting and outputting index data under control of the microcomputer for reproducing and recording; and an index reproducing control signal of the microcomputer. An index reproducing unit for reproducing the index information of the memory unit by the OSD; An index recording section for recording index-related data of the memory section by a com's index writing control signal, a program number detection section for detecting a current program number from an output of the first data processing section, and an index recording signal of the index recording section. A program number generating unit for generating a program number by the program number, a data selecting unit for selectively outputting the video data of the video data processing unit, index-related data of the index recording unit, or a program number of the program number generating unit, and data selected by the data selection unit; A second data processor for correcting an error of the second data processor and outputting position information, a data recorder for modulating to record the output data of the second data processor, and correcting the data of the first data processor for normal playback in an external manner. Data and control It is composed of a video reproducing and outputting the call. In addition, the DVCR index recording method of the present invention includes a first step of displaying index information according to whether or not an edit is made when an index recording key is selected, and a second step of storing index records in a memory after recording and modifying new index information; The third step of recording each program desired by the user and recording the index program number each time, the fourth step of detecting the current program and moving to the front of the current program when the eject key is inputted, and the moving time The fifth step of detecting and recording the index information stored in the second step in front of the current program tape and moving to the initial position. The index search method of the DVCR according to the present invention provides an index according to the presence or absence of index data when selecting an index play key. The first step of reproducing the information and checking the index program number; A second step of judging whether or not to go to a position, if desired, and moving to and playing the position; and if not wanting to go to a position viewed in the second step, displaying an index title and then selecting and moving the desired program number. Step 3, the fourth step of counting the movement time while moving to the front of the current program if the user wants to eject the tape after the playback in the third step, and the user writes new index data in the front of the program moved in the fourth step. And a fifth step of moving to an initial position.

Hereinafter, an apparatus and method for index recording / searching of a DVCR according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a block diagram of an index recording / searching apparatus of a DVCR according to the present invention. The data recovery unit 20 restores data and a clock from a tape during reproduction, and block synchronization is performed on the output signal of the data recovery unit 20. FIG. A synchronization detector 21 for detecting signals and rearranging data, a demodulator 22 for demodulating the output data of the synchronization detector 21, a first ID unit 23 for informing the original position of the demodulated data; A first error correcting unit 24 for processing a random error component during reproduction by using the determined position information, and a memory read and write direction during recording at the output of the first error correcting unit 24 during normal reproduction; A deinterleaving unit 25 for changing the?, A second error correcting unit 26 for processing the burst error component by changing the read and write directions in the deinterleaving unit 25, and the second error correcting unit ( The error corrected signals A first interface unit 27 for outputting data in accordance with output data and a control signal, a second interface unit 10 for interfacing a control signal from the outside during recording with a signal for DVCR, and the second interface unit 10 Read and write directions in which the third error correction unit 11 adds parity for preventing burst errors during reproduction, and the output signal to which the parity of the third error correction unit 11 is added. To control the system by outputting the interleaving unit 12 for changing and outputting a key, a key input unit 30 such as a panel key or a remote controller for outputting a system control signal according to a user's selection input, and an output of the key input unit 30. A system controller 31, a microcomputer 32 for outputting a control signal to record or reproduce an index according to the output of the system controller 31, a memory unit 38 for storing and outputting index data, and the microcomputer ( 1st of 32 Memory control unit 34 for selectively controlling the memory unit 38 during editing and reproducing, and output of the first error correcting unit 24 and index reproducing control signal of the microcomputer 32 during index reproducing. An index PB unit 36 for reproducing an index signal by means of a program, a program number detection unit 39 for detecting a program number currently being reproduced as an output of the first error correction unit 24, and the interleaving unit during index recording. By the output of (12), the index recording control signal of the microcomputer 32, and the index REC unit 35 which outputs the index signal under the control of the memory control unit 34, and the output signal of the index REC unit 35. A program number generator 37 for generating a program number each time a program is recorded, the video signal output from the interleaving unit 12, the index signal output from the index REC unit 35, and the program number generator ( From 37) A multiplexer unit 13 for selectively outputting the output program number, a fourth error correction unit 14 for adding parity to prevent random errors of the multiplexer 13 output signal, and the fourth error correction unit ( The second ID unit 15 for outputting the code value for the data position at which the output of the data 14) is to be recorded and the code value for the position of the actual data and the control signal, and the output data of the second ID unit 15 are converted into the DVCR system. And a parallel / serial conversion section 17 for converting the parallel data of the modulation section 16 into serial data and recording the data on a tape.

In the present invention configured as described above, when recording data on the tape, the second interface 10 converts an external control signal or the like into the DVCR and reverses the operation of the second interface 10 in the first interface 27 during playback. When the data input through the first and second interfaces 27 and 10 are respectively recorded, the third error correcting unit 11 adds parity to the second error correcting unit 26 to reproduce the data. Handle burst error components that occur during

The interleaving unit 12 at the time of recording and the deinterleaving unit 25 at the time of reproducing the signal to which the parity is added are used to reverse the read and write directions of the memory to process burst error components.

After processing the burst error component, parity is added to process the random error component by the fourth error correcting unit 14 during recording and the first error correcting unit 24 during reproduction. The second ID unit 15 modulates a code value for knowing the position of the data to be recorded and a code value for knowing the position of the actual data and other control signals by the output of the fourth error correcting unit 14 during recording. Send to 16. In addition, when reproducing the data demodulated by the demodulator 22, the first ID unit 23 knows the position of the original data, and when the data is deinterleaved by the deinterleaving unit 25 using the obtained position information. The ID code value of the first ID unit 23 is corrected when an error is issued by finding the position.

The modulator 16 modulates the data according to a condition suitable for DVCR during recording, and records the data on the tape as serial data via the parallel / serial converter 17.

The data recovery unit 20 restores the data and the clock from the signal generated during the playback after the tape is inserted. The synchronization detection unit 21 realigns the block synchronization signal and the data and inputs the demodulation unit 22 to the demodulator 22. The data is finally output through the first ID unit 23, the first error correcting unit 24, the deinterleaving unit 25, the second error correcting unit 26, and the first interface unit 27, and then the normal play. Do In addition, when the index recording signal is input from the user through a key input unit 30 such as a panel key or a remote controller, the signal selected by the user reaches the microcomputer 32 via the system control unit 31. Then, the index REC unit 35 is requested to record the index data edited by the user on the tape. At this time, the multiplexer unit 13 selects and records the video signal input from the interleaving unit 12 and the index signal input from the index REC unit 35 as appropriate.

When the program is recorded, the program number generation unit 37 sends the program number to the multiplexer unit 13 so that the program number is recorded while changing the program number. At the time of index reproduction, the signal output through the first error correction unit 24 is received by the index PB unit 36 and the program number detection unit 39 to detect the index data and the program number.

The detected index data is displayed on the OSD unit 33 under the control of the microcomputer 32.

The memory control part 34 shares the memory part 38 at the time of recording, and selectively controls the index data at the time of editing and reproduction. 5 is a position of signals related to an index to enter the index data area. These signals are recorded in units of sync blocks and are repeatedly recorded on the track.

5A is a position where data is inserted to determine whether or not the tape contains index information during index reproduction. Therefore, after searching for these signals, the index information is searched. And b is a signal position for recording index information edited and inserted by the user. In addition, c is the position of the index program number that is automatically entered each time the user records the actual program at the time of index recording. This index program number is automatically counted each time the index record signal is given in the STOP state. 6 is a diagram for explaining a DVCR index recording / searching apparatus according to the present invention, in which 1 to 5 are program numbers, a part of 5 has index information recorded first, and a part b of 3 is used by a user. This is the position to record the newly edited index information when the user wants to eject the tape when the user stops REW when playing or recording the index.

The loading signal is for the user to view the current position at playback and eject the tape afterwards if the user subsequently wants to continue watching the program at that position.

7 is a flowchart of an index recording method of a DVCR according to the present invention, and FIG. 8 is a flowchart of an index search method of a DVCR according to the present invention.

First, in the present invention configured as described above, the index recording method determines whether the user has selected the index recording key as shown in FIG. 7 (701S). It is determined whether is input (703S). If the general data recording key is input, the general data is recorded (704S). As a result of determining whether the index recording key is selected, when the index recording key is selected, index information is displayed on the screen (702S).

Subsequently, the user determines whether or not to edit (705S). If not, the user determines whether or not to search the index, displays the title when searching, and stores the index information in the memory (706S) (707S) ( 710S).

In order to perform the editing, the index information of the current tape, that is, the title is displayed and edited (708S) and stored in the memory (709S) and 710S. When not editing, the current tape is an existing tape, not a tape on which index information is not recorded. After storing the edited information or the existing index information in a memory, each program is recorded (711S), and a number is recorded for each program (712S). Thereafter, when the Eject key is pressed, the current program is detected and FF / REW is forwarded to the front of the current program (713S) (714S) or 715S.

At this time, the moving time (loading time) is counted (716S), and the index data stored in the memory and the checked loading time are recorded (717S). When the index data recording is completed, the last edited program number is FF / REW (718S). The position at which the tape is ejected after the FF / REW is finished is the position at which index information is read during index reproduction (719S). In addition, in the present invention, as shown in FIG. 8, the index reproducing method determines whether or not the user selects the index reproducing key (801S). 802S).

As a result of determining whether the general playback key is selected, when the general playback key is selected, only general video data is played back (803S) and ejected (804S). If the index reproduction key is selected in step 801, it is determined whether or not there is index data (805S). If the index data is not recorded on the tape or if the data is damaged even though the index data is recorded, an index data non-playback signal is output, and then the process returns to the initial state (806S). If the index data exists, the index data is reproduced (807S) and the index program number of the current position indicating the current position on the tape is checked (808S). After that, the user is asked whether he wants to go to the previously viewed position (809S), and if he wants to go to the previously viewed position, the player plays after moving (812S).

If the user does not want to go to the previously viewed position, the index title is displayed, and then the desired program number is selected and moved and played (810S) (811S) (812S).

If the user wants to eject the tape after the playback is finished (813S), the user moves to the front of the program at the current position and counts the movement time (814S) (815S). Then, the user records the index data modified by the user in front of the program and moves forward for the time recorded, that is, moves to the initial position (816S) (817S).

As described in the present invention, the present invention enables index recording / searching in the tape itself, and in the index recording mode, index data can be searched at any position without being overwritten by recording index information at the front of the program.

Claims (7)

A video data processing unit for converting an external signal to a DVCR during recording and preventing an error, a data detecting unit for restoring a data and a clock on a tape during playback, and detecting a synchronous signal, and demodulating and positioning the data output from the data detecting unit. A first data processing unit for processing an error using information, an input unit for controlling a system according to a user selection input, an OSD control, an index recording and a reproducing control signal output according to a control input of the input unit, and a memory controller A microcomputer for controlling, a memory unit for inputting and outputting index data under the control of the microcomputer for reproducing and recording, an index reproducing unit for reproducing the index information of the memory unit in the OSD by an index reproducing control signal of the microcomputer; The index of the memory section is related to the index write control signal of the microcomputer. An index recorder for recording other data, a program number detector for detecting a current program number from the output of the first data processor, a program number generator for generating a program number by an index record signal of the index recorder, and A data selection unit for selecting and outputting image data of a video data processing unit or an index-related data of the index recording unit or a program number of a program number generating unit, and a second data processing unit for correcting errors and outputting position information of the data selected by the data selection unit; And a data recording unit for modulating to record the output data of the second data processing unit, and an image reproducing unit for error correction of data of the first data processing unit during normal reproduction and outputting data and control signals to the outside. DVCR Indexer / Search unit. The apparatus of claim 1, wherein the video data processor is configured to interface an externally input signal with a signal suitable for a system, an error correction unit for adding parity to an output signal of the interface unit, and a parity at the error correction unit. And an interleaving unit configured to read and output a signal to which the signal is added in a vertical or horizontal direction, respectively. The data processing unit of claim 1, wherein the first data processing unit processes a random error component using the demodulation unit for demodulating the output data of the data detection unit, an ID unit for outputting the original position of the demodulated data, and the position information. DVCR's index recording / searching apparatus comprising an error correction unit. The image reproducing unit of claim 1, wherein the image reproducing unit includes a deinterleaving unit for changing the read and write directions during recording, an error correcting unit for processing a burst error at the output of the deinterleaving unit, and outputting the error corrected signals to external output signals. DVCR index recording / search device, characterized in that consisting of an interface unit for outputting. In the index data recording of DVCR, a first step of displaying index information according to whether or not an edit is made when selecting an index recording key, a second step of storing index records in a memory after recording and modifying new index information, and a user. The third step of recording each program desired by the user and recording the index program number each time, the fourth step of detecting the current program and moving to the front of the current program when the eject key is input, and detecting the movement time. And a fifth step of recording the index information stored in the second step in front of the current program tape and moving to the initial position. In index data reproduction of DVCR, the first step of reproducing index information and checking the index program number according to the presence or absence of index data when the index reproduction key is selected, and determining whether or not the user wants to go to the previously viewed position. The second step of moving to and playing back, the third step of moving and playing by selecting a desired program number after displaying the index title if the user does not want to go to the position seen in the second step, and the playback of the third step. If the user wants to remove the tape after finishing, the fourth step of counting the moving time while moving to the front of the current program, and the fifth step of recording new index data and moving to the initial position by the user in the front of the program moved in the fourth step DVCR index search method characterized by the above-mentioned. 7. The DVCR index search method according to claim 6, wherein an index non-playable signal is output if the tape does not have index information.