KR100584459B1 - A CD player having a search function and the method thereof - Google Patents

Abstract

A control unit for controlling the operation of the CD player by recognizing a control signal input unit receiving a control signal of the user, a signal provided from the control signal input unit, and a servo for driving CD and reproducing sound according to the output signal of the control unit (SERVO) A CD player comprising: a) and an output unit which performs a sound output function and a display function by control signals of the control unit and the servo unit; The control signal input unit is a CD player that adds a CD play position reverse search switch so that a user can easily find a desired position by storing the position information of the CD played / stopped by a key operation.

Play, Search, Reverse, CD Player

Description

CD player having a search function and the method             

1 is a view showing the appearance of a typical CD player,

2 is a view showing the appearance of a CD player according to the present invention;

3 is a block diagram showing an internal configuration of a CD player;

4 is a flowchart illustrating an operation relationship according to a key input according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a compact disc (hereinafter referred to as a CD), and more particularly, to an apparatus capable of automatically retrieving key operation information stored in a storage device in reverse order.

The configuration of a general CD player is configured as shown in FIG. CD players can be largely divided into internal and external. In this example, the external CD player 10 is taken as an example. A CD mounting unit 11 for mounting a CD, a key input unit 12 for accepting an adjustment intention of a user, and a liquid crystal display unit 13 for displaying a progress state of the CD player. The key input unit 12 has a power switch S1, a disk ejector S2, a rewind S3, a fast forward S4, a playback S5, a stop S6 and a pause S7. ) Operation switch and so on. The function of each switch is general and is not explained.

When such a CD player needs to find a desired part, a user must operate a plurality of keys, and it is cumbersome to find the correct position. In addition, if a user "A" leaves the CD player due to sudden operation while using the CD player, and the user "B" operates the CD player, the CD player that the user "A" is listening to The playback position changes. Therefore, the user "A" needs several key operations to find the position where he / she finally played and stopped, and the rewind (S3) and fast-forward (S4) switches operate at high speed, and therefore must be proficient in key operation. There was an inconvenience to find the desired location.

An object of the present invention is to provide a retrieval apparatus and retrieval method capable of easily performing a position search of a CD player.

Another object of the present invention is to enable a CD player user to accurately find a desired playback position.

CD player having a search function according to the present invention for achieving the above object is a control signal input unit for receiving a control signal of the user, a control unit for recognizing the signal provided from the control signal input unit for controlling the operation of the CD player; A CD player comprising: a servo unit for driving and reproducing a sound according to an output signal of the control unit; and an output unit for performing a sound output function and a display function by a control signal of the control unit and the servo unit; The control signal input unit is configured to add a CD playback position reverse search switch so that the user can easily find the desired position by storing the position information of the CD played / stopped by the operation of the key.

As a detailed feature of the CD player according to the present invention, the control unit includes a storage device for performing a reverse search, and the storage device includes a location information area for storing location information of the disc when an event occurs and an event. ) A counting information area for storing counting information on the number of occurrences, a pointer area for indicating a pointer of position data in the location information area when the reverse search switch is operated, and a buffer area for storing temporary data. It is at that point.

Features of the search method according to the invention are the process of checking whether the disc (Disc) is mounted, the process of receiving a key through the input unit, the process of checking whether the input key is a search key, and when it is determined that the search key It consists of a processing according to a search key input and a general processing when it is determined as a general function key.

The detailed features of the search method according to the present invention include the steps of the general processing, checking whether an event has occurred, comparing the position data of the current disc with the data already stored, and the current position data value. Storing the information in a location information area, wherein the processing according to the search key input includes checking whether there is a stored event occurrence data, recognizing a stored pointer in a pointer area, and Recognizing the position information of the disk in the corresponding position information area, and sending information to the servo (Servo) unit to reproduce at the position of the recognized disk.

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation of the CD player according to the present invention. 2 is a view showing the appearance of a CD player having a search function according to the present invention. Unlike the CD player according to the related art shown in FIG. 1, it can be seen that a search key S8 for performing a search function is added to the key input unit 12.

Each time the search key S8 is pressed, the playback position that has been changed by any key operation so far can be searched and played in the reverse order.

3 is a block diagram showing an internal configuration of a CD player. As shown in the drawing, the CD player controls the operation of the CD player by recognizing the control signal input unit 1 receiving the control signal of the user and the signal provided from the control signal input unit 1 when looking at the function. The control unit 2, the servo unit 3 for driving CD and reproducing the sound according to the output signal of the control unit 2, and the control provided from the control unit 2 and the servo unit 3 It is composed of an output unit 4 for performing a sound output function and a display function according to the signal.

As shown in FIG. 2, the control signal input unit 1 may be provided with an additional control button or may be configured as a key matrix by a combination of keys.

Let's look at the function of each component. The control signal input unit 1 serves as an interface between the user and the CD player. The control signal input unit 1 transmits the user's intention to the control unit in a promised format so that the control unit 2 can recognize the user's intention. It acts as an intermediate mediator.

Therefore, one additional event related data is added to the data format transmitted from the control signal input unit 1 to the control unit. Here, the "event" refers to a search key for finding a time point when Play or Stop was pressed by a user or a third party's operation. When the user presses this key, the control unit performs an operation according to the corresponding function key.

The control unit 2 is provided with a microcomputer for controlling the CD player. In particular, the microcomputer reads a signal provided through the input unit 1 and transmits an operation signal according to the servo unit 3 and the output unit 4. Built-in program to control sending to Therefore, the controller 2 recognizes the intention of the user and performs a function of controlling the CD player to be operated according to the recognized state.

Servo unit 3 determines the functions of Play, Stop, Track Up / Down, etc. according to the control signal of the controller 2, and accordingly, Pick Up ) Focusing, traverse positioning and spindle motor rotation. The control state and the like are transmitted to the control unit 2 and the sound data and the image data of the disc Disc are transmitted to the output unit 4.

The output unit 4 outputs the data transmitted from the servo unit 3 to the speaker or the liquid crystal display screen according to the command of the control unit 2.

On the other hand, the microcomputer in the control unit 2 is provided with a temporary memory (Random Access Memory). When the play / stop key is pressed, the memory device has a location information area for storing the position information of the disc, a count information area for storing the count information for the number of times of play / stop occurrence, and a reverse search switch. And a pointer area for indicating a pointer of position data in the position information area at the time, and a buffer area for storing temporary data.

The position information area is the disc position information at the time of the play / stop occurrence. In this example, the play / stop switch is set to be recognized up to 20 times, and the size thereof can store 20 pieces of information by 3 bytes. The count information area stores the number of times the play / stop switch is pressed and has a capacity of 1 byte. When performing the reverse search, the pointer area for indicating the point of the location information area is 1 byte, and 1 byte is allocated to the buffer area for storing the temporary data. When the disc is ejected, it is assumed that all the information in the storage device is volatilized. This is because when the disk is changed, all the stored data up to now is invalid, and there is no need to save it.

4 is a flowchart illustrating an operation process when a play / stop button is pressed and a search function key is pressed according to the present invention, and the performance of the search function key according to the present invention will be described using this.

The signal input to the control unit 2 through the control signal input unit 1 is analyzed to determine whether the search function is performed.

In the case of the general function key, the operation of the corresponding function key is performed. (S11) At this time, it is determined whether the position information needs to be stored by checking whether it is a control key for regeneration or stop (S12). If it is necessary to return to the process and store, it is determined whether the information on the location is stored. (S13) If the same location information is stored, the process returns to the step S10. The information is entered in the information area (S14), and the number information and the pointer information are stored (S15). The number information is checked 20 times or more (S16). Otherwise, increase the storage frequency and store. (S17)

If it is determined as a search key, the position information value in the pointer information area is read (S21), and the playback position is changed to the position according to the corresponding information (S22). The changed information is transmitted to the servo unit to change the focus and output it. (S23) Each time the user presses the search key, the user changes the CD play position to the corresponding position according to the information of the position where the event (play / stop) has occurred so as to find and play it in the reverse order. Can be found easily.

As described above, the present invention has an effect of quickly and easily retrieving information of a disc that has been played to date from the latest position in reverse order after applying power.

Claims (5)

delete A control unit for controlling the operation of the CD player by recognizing a control signal input unit receiving a control signal of the user, a signal provided from the control signal input unit, and a servo for driving CD and reproducing sound according to the output signal of the control unit A CD player comprising a (SERVO) unit and an output unit which performs a sound output function and a display function by control signals of the control unit and the servo unit; The control signal input unit includes a CD play position reverse search switch so that a user can easily find a desired position by storing the position information of the CD which has been played / stopped by a key operation. The control unit includes a storage device for performing a reverse search, the storage device A location information area for storing location information of a disc when a play / stop occurs; A count information area for storing count information on the number of times of play / stop occurrence; A pointer area indicating a pointer of the position data in the position information area when the reverse search switch is operated; And a buffer area for storing temporary data. delete Checking whether or not the disc is installed, Receiving a key through an input unit; Checking whether the input key is a search key, Processing according to search key input when judged to be a search key, Including general processing when judged to be a general function key, The general treatment process, Checking whether an event has occurred, Comparing the position data of the current disc with the data already stored; And a step of storing the current position data value in the position information area. Checking whether or not the disc is installed, Receiving a key through an input unit; Checking whether the input key is a search key, Processing according to search key input when judged to be a search key, Including general processing when judged to be a general function key, The process according to the search key input, Checking the existence of stored event occurrence data; Recognizing the stored pointer in the pointer area; Recognizing location information of a disc in the location information area corresponding to the pointer value; And transmitting information to the servo unit so that the disc is reproduced at the recognized position of the disc.

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