KR20010073675A - Apparatus and method for searching a position of recorded video signal in digital video recorder - Google Patents

Abstract

PURPOSE: A device for searching images in a digital video recorder/player is provided to additionally construct a hard disk capable of random access, and to search/play a recording image signal at a high or low speed. Therefore, it is possible to prevent life shortening of a head and a deck mechanism by servo control. CONSTITUTION: A head(1) reads out a signal recorded on a videotape, and records the signal. An analog signal processor(2) processes the recorded signal as an analog signal. A digital signal processor(3) processes the analog signal as digital packet data. A decoder(4) decodes the digital packet data as an orignal image and audio data, and outputs an analog playing image and an audio signal. A hard disk(5) temporally stores the digital packet data and recording location information thereof. A microcomputer(6) plays and searches the signal recorded on the videotape recording media.

Description

Apparatus and method for searching a position of recorded video signal in digital video recorder}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for searching video in a digital video recorder, and more particularly, to a video recorder such as a digital video recorder (D-VCR), wherein a large capacity memory such as a hard disk capable of random access is provided. The present invention relates to an image search apparatus and method in a digital video recording / reproducing apparatus, which is further configured to enable playback and search of a video signal recorded on a digital video tape at a high speed or a low speed.

First, VRC, which is one of the video recording and reproducing apparatuses that are widely used and widely used, reads and reproduces a large amount of video signals and audio signals recorded on a video tape, or magnetically reproduces video signals and audio signals received from outside. I) As a generalized video recording and reproducing apparatus, recently, digital VLC capable of recording and reproducing high-definition digital video signals, in particular, digital VRs conforming to the DVHS standard has been developed and released.

Accordingly, a user can record and store a high definition video signal and an audio signal of his / her desired high quality on a digital video tape, which is a large capacity recording medium, or record a high quality video signal and audio recorded on a digital video tape using the digital VR. The signal can be read out and played back.

However, in the above digital DVD, since a digital video tape is used as a recording medium, as in a disc player using a disc as a recording medium, for example, a DVD player, randomly accesses a recorded video to achieve high speed. In order to reproduce and search at a low speed, complicated servo control and signal processing algorithms are required, and the life of the head and deck mechanisms is greatly shortened due to the servo control.

Therefore, the present invention was created to solve the above problems, and additionally constitutes a hard disk capable of random access in a digital VR using a digital video tape, which is a magnetic recording medium, and records the recorded data on the digital video tape. SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus and method for searching video in a digital video recording / reproducing apparatus which can easily search and play back video signals at high speed or low speed.

1 illustrates a configuration of an image search apparatus in a digital video recording player according to the present invention.

2 to 5 show an operation flowchart of a video searching method in a digital video recording and playback player according to the present invention.

※ Explanation of code for main part of drawing

1: Head 2: Analog signal processor

3: digital signal processing unit 4: decoding processing unit

5: Hard Disk 6: Micom

According to the present invention for achieving the above object, a video searching method in a digital video recording / reproducing apparatus includes random access to a portion of data to be recorded or read and a recording position thereof when recording or reading video data onto a tape recording medium. 1 step of recording in the storage means possible; And reading out and reproducing the data recorded in the storage means when the tape recording medium is requested to be searched.

In addition, an apparatus for searching video in a digital video recording / playback apparatus according to the present invention comprises: reading means for reading out a video signal to a tape recording medium; Signal processing means for signal-processing the read signal into an analog signal; Digital signal processing means for signal processing the analog signal into digital data; Decoding means for decoding the digital data into original video and audio data and then outputting the reproduced video and audio signals; Storage means for selecting and temporarily storing a part of the digital data to be processed; And control means for controlling the operation of the means, identifying the position of the temporarily stored digital data on the recording medium, and searching for a signal recorded on the tape recording medium based on the position.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, preferred embodiments of an image searching apparatus and method in a digital video recording / reproducing player according to the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 1 shows a configuration of an image search apparatus in a digital video recording / reproducing player according to the present invention, comprising: a head (1) for reading or recording a signal recorded on a video tape; An analog signal processor (2) for signal-processing the read or recorded signal into an analog signal; A digital signal processor (3) for signal processing the analog signal into digital packet data; A decoding processing unit (4) which decodes the digital packet data into original video and audio data and outputs the analog reproduced video and audio signals; A hard disk (5) for temporarily storing the digital packet data and its recording position information; And a microcomputer 6 for controlling the operation of the constituent means to reproduce and search a signal recorded on the videotape recording medium at a high speed or a low speed, the digital video recording / reproducing apparatus configured as described above. A detailed description of the video searching and playback method is as follows.

First, FIG. 2 is a flowchart illustrating a video search method in a digital video recording player according to the present invention. In particular, a review operation of a high speed playback of a signal recorded on a video tape in a reverse direction is first performed by a user. When the playback key is input, the microcomputer 6 sets the playback mode to the current operation mode (S10), and accordingly the signal recorded on the video tape is read out by the head 1 after that. Signal processing is performed by the analog signal processor 2 and the digital signal processor 3 into digital packet data, and the digital packet data is decoded by the decoding processor 4 into original image data and audio data. The analog reproduction video signal and the audio signal are output (S11).

On the other hand, the digital packet data signal-processed by the digital signal processing unit 3 is intermittently recorded on the hard disk 5 at a predetermined period. At this time, the microcomputer 6 records the digital packet data intermittently recorded. The position, that is, the information on the signal reproduction position, is recorded and stored in association with the digital packet data intermittently recorded on the hard disk 5 (S12).

Thereafter, when a key for requesting a review operation is input from the user (S13), the microcomputer 6 reads the intermittently recorded digital packet data on the hard disk 5 (S14), and the read digital The packet data is decoded into the original video data and audio data by the decoding processor 4 and then output as an analog reproduced video signal and an audio signal (S15).

On the other hand, the microcomputer 6 reads and confirms playback position information stored in association with the digital packet data, and rapidly transfers the video tape to the original recording position of the digital packet data currently being reproduced and output (S16). When the user inputs a play key or a stop key, the review operation is released (S17), and an operation corresponding to the input play key or stop key is performed (S18).

FIG. 3 is a flowchart illustrating an image search method in a digital video recording / reproducing apparatus according to the present invention, in particular, a review operation during a recording operation. When a recording key is input from a user, FIG. (6) sets the current operation mode to the recording mode (S20), whereby the signal input from the outside is converted into a signal suitable for recording by the digital signal processing section 3 and the analog signal processing section 2; After signal processing, the data is recorded on the video tape through the head 1 (S21), and the digital packet data processed by the digital signal processing unit 3 is intermittently recorded on the hard disk 5 at a predetermined period. At this time, the microcomputer 6 associates the information on the recording position of the digital packet data to be intermittently recorded with the digital packet data to be intermittently recorded to the hard disk 5. Thereby storing (S22).

Thereafter, when a key for requesting a review operation is input from the user (S23), the microcomputer 6 reads the intermittently recorded digital packet data on the hard disk 5 (S24), and the read digital The packet data is decoded into the original video data and audio data by the decoding processor 4 and then output as an analog reproduced video signal and an audio signal (S25).

On the other hand, the microcomputer 6 reads and confirms the recording position information stored in association with the digital packet data, and rapidly transfers the video tape to the original recording position of the digital packet data currently being reproduced and output (S26). When the user inputs a play key or a stop key, the review operation is released (S27), and an operation corresponding to the input play key or stop key is performed.

FIG. 4 is a flowchart illustrating a video search method in a digital video recording / playback apparatus according to the present invention, in particular, a slow playback operation during a playback operation. When a playback key is input from a user, The microcomputer 6 sets a playback mode in the current operation mode (S30), and accordingly the signal recorded on the video tape is read by the head 1, and then the analog signal processor 2 And digital signal data by the digital signal processor 3, which is decoded by the decoding processor 4 into original video data and audio data, and then converted into analog reproduced video signals and audio signals. It is output (S31).

On the other hand, the digital packet data signal-processed by the digital signal processing unit 3 is intermittently recorded on the hard disk 5 at a predetermined period. At this time, the microcomputer 6 records the digital packet data intermittently recorded. The position, that is, the information on the signal reproduction position, is recorded and stored in association with the digital packet data intermittently recorded on the hard disk 5 (S32).

Subsequently, when a key for requesting a slow playback operation is input from the user (S33), the microcomputer 6 maintains the video tape feed rate and playback speed at the current normal speed state (S34). The digital packet data, which is read out and processed by the signal, is temporarily stored in the hard disk 5 (S35), and then read again at a speed corresponding to the slow playback speed requested by the user, while the read digital packet data is The decoding processing unit 4 decodes the original video data and audio data and outputs the analog reproduced video signal and audio signal (S36).

Thereafter, when the user inputs a play key or a stop key, the slow play operation is released (S37), and an operation corresponding to the input play key or stop key is performed (S38).

5 shows a video search method in a digital video recording / reproducing apparatus according to the present invention, in particular, a video in which preview image data and its recording position information are separately recorded from a general recording signal at the beginning of a video tape. FIG. 1 shows an operation flowchart for searching and playing a tape. First, as described above, a video tape in which preview data and its recording position information are recorded at the beginning is placed and loaded by a deck mechanism (not shown) of the digital video recorder. When loading (S40), the microcomputer 6 rewinds the loaded video tape to search for the start position of the video tape, that is, the recording position where the preview data and the recording position information are recorded. (S41), the preview data is recorded on the video tape or the table of contents information on the video programs recorded on the video tape Data corresponding to sampling still image screens having a predetermined interval.

Thereafter, when the recording position is searched (S42), the microcomputer 6 reads out the preview data and the recording position information recorded at the corresponding position, and records and stores the recorded data on the hard disk 5 (S43). After that, a key input from a user is detected and confirmed. When the key for requesting search information on the video tape is input (S45), the microcomputer 5 enters into the hard disk 5. The recorded and stored preview data and the recording position information are read out again, and the read data is decoded by the decoding processing section 4, and then converted into an analog reproduced video signal and outputted (S46).

Therefore, the user can check the output video signal, that is, the preview video screen, through a television or the like, so that the user can easily search and reproduce the recording position of the specific section desired by the user.

The video search apparatus and method in the digital video recording and playback apparatus according to the present invention configured as described above further comprises a digital disk using a digital video tape, which is a magnetic recording medium, by adding a hard disk capable of random access to the digital video. By making it possible to easily search and play back recorded video signals recorded on tape at high speed or low speed, complicated servo control and signal processing algorithms are not required for this purpose, and the life of the head and deck mechanisms due to servo control is fundamentally reduced. It is a very useful invention that can be prevented.

Claims (8)

A step of recording a portion of the data to be recorded or read out and the recording position thereof in a randomly accessible storage means when recording or reading the image data onto the tape recording medium; And And reading out and reproducing the data recorded in the storage means when the tape recording medium is requested to be searched. The method of claim 1, And fast moving the tape recording medium to a position corresponding to a recording position stored in association with the read / reproduced data. The method of claim 1, And the data recorded in the storage means is recorded as a data packet having a predetermined recording size. A step (1) of intermittently selecting data read out from the tape recording medium intermittently and storing in randomly accessible storage means upon request of a slow playback of the tape recording medium; And And reading out and reproducing the data intermittently stored in said storage means at a low speed. A step (1) of reading out some data and position information recorded at the beginning of the tape recording medium, and recording them in a storage unit capable of random access; And And searching for and reproducing the data recorded in the storage means when the search information is requested for the tape recording medium. The method of claim 1, And the data is packet data corresponding to a preview image. Reading means for reading an image signal on a tape record carrier; Signal processing means for signal-processing the read signal into an analog signal; Digital signal processing means for signal processing the analog signal into digital data; Decoding means for decoding the digital data into original video and audio data and then outputting the reproduced video and audio signals; Storage means for selecting and temporarily storing a part of the digital data to be processed; And And controlling means for controlling the operation of the means, for identifying the position of the temporarily stored digital data on the recording medium, and searching for a signal recorded on the tape recording medium based on the position. Image search device in the recording player. The method of claim 7, wherein And the storage means is a hard disk on which the digital packet data processed by the digital signal processing means and its recording position information are recorded and stored.