KR100196868B1 - Method and apparatus for searching frame in vcr - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video cassette recorder capable of viewing a predetermined section of a video signal recorded on a videotape as a still picture. The present invention provides a search control command for searching a still picture and frame sequence data for an image to be searched. A command applier 100; A memory 102 for storing sequence data of an image frame with respect to a still picture provided from the command applier 100; A frame detector 104 for detecting a frame of the video signal read out from the video tape; A counter 106 for counting image frames detected from the frame detector 104; The motor drive control signal is output so that the frame sequence data stored in the memory 102 and the counted data in the counter 106 are the same, and the frame sequence number data in the memory 102 and the count value of the counter 106 are the same. A system controller 108 which stops the running of the video tape and reproduces and processes the video signal of the video tape as a still picture; And a motor controller 110 for controlling the running of the video tape reproduced on the basis of the motor drive control signal provided from the system controller 108.

Description

Apparatus and method for controlling still picture navigation in video cassette memory (VCR)

1 is a block diagram showing a still picture navigation control apparatus of a VCR according to the present invention;

2 is a flowchart illustrating a still picture navigation control method of a VCR according to the present invention;

3 shows an additional key for implementing the invention on a remote controller.

4 is a data format configuration diagram for counting video frames.

* Explanation of symbols for main parts of the drawings

100: command authorization unit 102: memory

104: frame detector 106: counter

108: system control unit 110: motor control unit

112: OSD processing unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video cassette recorder (hereinafter referred to as a VCR), and more particularly, to a still picture search control apparatus and method capable of accurately searching a still picture during a playback mode of a VCR.

In general, the VCR system is controlled by a remote controller (remote control) or a key matrix circuit, and operates in a plurality of driving modes. In particular, the VCR system displays a video signal embodied in a plurality of frames through a receiving tube.

On the other hand, the viewer may not be able to see the displayed object accurately because the movement of the video signal to be reproduced during the playback mode operation is fast.

To compensate for this, a pause function (Frame-Advance, Still), a slow function and a jog shuttle function are added to the VCR, so that the video signal can be played slowly so that the screen can be viewed more accurately.

Here, the pause function (Frame-Advance, Still) is to display the frame image signal at the time when the control signal for the pause mode is applied in a stationary state, which is paused until the desired still picture is searched for by the viewer. The disadvantage is that the function must be repeated.

The slow function (Slow) is repeated from the time when the control signal for the slow mode is applied in the screen to be reproduced, for example, four frames to the normal playback operation, the next one frame is repeated (play-stop) To play the screen slowly.

However, when the movement of an object changes drastically, the slow function does not allow the viewer to accurately search for a still image. Although the jog shuttle function is also a function for easily navigating the still image, the jog shuttle function has a disadvantage in that a large amount of cost is added due to the addition of parts.

SUMMARY OF THE INVENTION The present invention has been made to solve these disadvantages, and an object of the present invention is to provide a still picture search control device of a VCR capable of accurately searching for a desired picture and playing it as a still picture in a playback mode of the VCR.

Another object of the present invention is to provide a still picture search control method of a VCR capable of searching for a desired predetermined picture among playback modes of a VCR and reproducing the found picture as a still picture.

In order to achieve the above object, the present invention provides a video cassette recorder which reads and reproduces a video signal of a videotape and displays the video signal on a receiving tube, wherein a search control command for searching for a still picture and a frame sequence for a video to be searched are provided. An instruction authorizing unit for providing data; A memory for storing sequence data of an image frame with respect to a still picture provided from a command applying unit; A frame detector which detects a frame of the video signal read out from the video tape; A counter for counting image frames detected from the frame detector; The motor drive control signal is output so that the frame sequence data stored in the memory and the data counted in the counter are the same.If the frame sequence data in the memory and the counter value are the same, the video signal of the videotape is reproduced as a still picture. A system controller for controlling; And a motor controller for controlling the running of the video tape reproduced on the basis of the motor drive control signal provided from the system controller.

The present invention also provides a driving method of a video cassette recorder capable of counting a video signal recorded on a video tape on a frame basis as the video tape travels, and determining whether a search control command for viewing a still picture is applied. Steps; If the input control command is not a search control command, operating the video cassette recorder in a mode according to the authorized control command, and if the search control command is input, inputting predetermined frame sequence data; Storing the inputted frame sequence number data and comparing the counted value with the stored frame sequence number data; If the stored frame sequence number data and the count value do not match, running the video tape to a count value corresponding to the stored image frame sequence data; And reproducing the video signal of the videotape as a still picture when the stored video frame sequence data and the count value match.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a still picture search control apparatus for a VCR according to the present invention, which includes a command applier 100, a memory 102, a frame detector 104, a counter 106, a system controller 108, The motor controller 110 and the OSD processor 112 are configured.

The command applier 100 provides a search control command for searching a still picture and frame sequence data for an image to be searched to the system controller 108, which will be described later. It may be configured as a remote control device or a key matrix circuit shown in FIG.

The memory 102 is configured to store the frame sequence data from the command applier 100 through the system controller 108.

The frame detector 104 is configured to detect the start point and the end point (corresponding to FIG. 4) of each video frame reproduced from the video tape and provide them to the counter 106 described later.

The counter 106 counts the start time and the end time of each image frame detected by the frame detector 104, and provides the system control unit 108 with the sequence number data of the image frame based on the counted value.

The system control unit 108 operates the VCR in the play mode, the stop mode, the move mode, the sequence data display mode, and the like, based on the control command provided from the command applier 100.

The motor controller 110 controls the rotation direction (forward and reverse rotation) and the rotation speed (the rotation speed) of the video tape being played based on the control signal (for example, the stop mode, the movement mode, the rotation speed mode, etc.) provided from the system controller 108. Fast forward, fast reverse, etc.), and the motor control unit 110 includes a driving motor (capstan motor, etc.) and a servo unit for operating the driving motor.

The OSD processing unit 22 is configured to display the sequence data of the image frame reproduced from the video tape based on the frame sequence data provided from the system control unit 108.

2 is a flowchart of the still picture search control method of the VCR of the present invention for controlling the driving of the still picture search control device of the VCR according to the present invention.

First, the system control unit 108 according to the present invention performs a step 201 of determining whether a search control command for viewing a still picture is applied, and if not determined as a search control command, performs an operation according to the applied control command. (202, 203) inputting predetermined frame sequence data for a desired still picture within a predetermined time, when read by the search control command, and storing the input frame sequence data, and storing the stored frame sequence data and the currently displayed image frame. Comparing the sequence number data (204, 205), and if the result of the comparison does not match the stored frame sequence data and the sequence data of the currently displayed image frame, the tape is moved to the image frame position corresponding to the stored image frame sequence data. (206) and the stored image frame order If the data and the sequence data of the counted frame coincide, the moving video tape is stopped and a still image of the video signal read out from the stopped video tape is output (step 207).

3 is a perspective view showing an additional key added to a remote controller or key matrix circuit for implementing the present invention, reference numeral 301 denotes a search command control key for applying a search control command, and 302 inputs frame sequence data. It is a conventional keypad (0-9).

303 is a play key, 304 and 305 are rewind keys and a fast key, and 306 and 307 are fast rewind keys and a fast forward key. Reference numeral 308 denotes a pause key, and 309 denotes a recording mode key.

FIG. 4 is a block diagram illustrating a data format for counting image frames. The start and end points of each image frame are shown. The image frames may be classified based on the start and end points of the image frame.

The operation of the present invention configured as described above will be described in detail.

First, when a viewer inserts a video tape into the VCR system and operates the playback key 303 (corresponding to FIG. 3), the video signal thus reproduced is displayed in the receiving tube.

At the same time, the frame detector 104 detects the start and end time points of the image frame to be reproduced and provides them to the counter 106. Therefore, the counter 106 counts the sequence number for the frame detected by the frame detector 104 and provides this data to the system controller 108. In addition, this sequence data is displayed as OSD characters.

For example, the viewer may apply a search control command to the system controller 108 to search a still picture using the command applier 100 while watching a VCR.

The system control unit 108 determines whether a search control command from the command application unit 100 is applied by performing step 201. As a result of the determination in step 201, when a search control command for searching for a still picture is not input and another control command is input, the system controller 108 performs operation 202 to enter an operation mode according to another command. Turn on the VCR.

However, if it is determined as a search control command for searching for a still picture as a result of the determination in step 201, the system controller 108 proceeds to step 203, wherein the user inputs frame sequence data for the still picture. It must be entered within a certain time. Such frame sequence number data may be selected using frame sequence number data displayed by the OSD processing unit 22. That is, since the OSD processing unit 22 displays the sequence number of the frames counted by the counter 106, the user refers to the sequence number of the frame displayed by the OSD processing unit 22, so that the frame sequence number of the screen to be viewed as the still image is displayed. Inferring and applying the inferred frame sequence to the system control unit 108 through the command application unit (100).

The image frame sequence data input through the above-described process is stored in the memory 102 through the system controller 108 (step 204), and the system controller 108 stores the image frame sequence data stored in the memory 102. The sequence data of the video frames counted from the counter 106 (the currently displayed video frame) is compared (step 205).

As a result of the comparison in step 205, if the stored and updated frame sequence data does not match the sequence number of the current video frame, a control signal (e.g., fast forward or fast forward) moves the tape to the position of the stored frame sequence data. Winding, etc.) to the motor control unit 20. The motor controller 20 rotates the video tape being played back based on a control signal (for example, movement mode, rotation speed mode, etc.) provided from the system controller 108.

However, as a result of the comparison in step 205, if the stored frame sequence data and the sequence data of the currently displayed image frame match, the system control unit 108 proceeds to step 207 to stop the transfer of the tape, and the stop The still image is displayed on the receiving tube by reproducing the video signal of the recorded tape.

As described above, according to the present invention, the viewer can freely set a desired still picture during the playback mode of the VCR, so that the viewer can watch the still picture more accurately.

In addition, although the present invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the appended claims.

Claims (3)

A video cassette recorder which reads and reproduces a video signal of a videotape and displays the video signal on a receiving tube, wherein the command applier 100 provides a search control command for searching a still picture and frame sequence data for an image to be searched. Wow; A memory (102) for storing sequence data of an image frame of a still picture provided from the command applying unit (100); A frame detector (104) for detecting a frame of an image signal read out from the video tape; A counter (106) for counting image frames detected by the frame detector (104); The motor drive control signal is output so that the frame sequence data stored in the memory 102 and the data counted in the counter 106 are the same, and the frame sequence data of the memory 102 and the counter 106 are counted. A system controller (108) for controlling to stop the video tape and to reproduce the video signal of the video tape to a still picture if the values are the same; And a motor control unit (110) for controlling the running of the video tape on which the video signal is reproduced based on the motor drive control signal provided from the system control unit (108). The OSD control unit of claim 1, wherein the system controller 108 is configured to output a display control signal according to the count value of the counter 106, and displays the count value according to the display control signal as an OSD character. 22). Still picture navigation control apparatus of a video cassette recorder, characterized in that it further comprises. A driving method of a video cassette recorder capable of counting an image signal recorded on a video tape on a frame basis as the video tape travels, the method comprising: determining whether a search control command for viewing a still image is applied (201) Wow; If the input control command is not the search control command, operating the video cassette recorder in a mode according to the authorized control command, and inputting (202,203) predetermined frame sequence data if the search control command is performed; Storing the input predetermined frame sequence number data and comparing the stored frame sequence number data with the count value (204, 205); Driving (206) the video tape to a count value corresponding to the stored image frame sequence data if the stored frame sequence number data does not match the count value as a result of the comparison; If the stored video frame sequence data and the count value match, stopping driving of the video tape and reproducing the video signal of the video tape as a still picture (207). Way.