KR970060155A - CDP's ESP automatic switching device and its method - Google Patents

Abstract

The present invention relates to a portable optical disk player and an optical disk player for an automobile which detect an impact amount and adjust a reproduction speed to provide convenience to a user and automatically reduce a reproduction speed to 1x when there is no impact, And more particularly, to an automatic switching device and method thereof.

The present invention relates to an EFM signal processing apparatus and method which include a signal processing unit for demodulating an EFM signal read by a pickup unit into an original signal, correcting errors, transmitting a control signal to a servo unit and a control unit, and transmitting audio data to a memory control unit, A servo unit for controlling the servo in accordance with the control signal of the control unit and controlling the reproduction speed in accordance with the reproduction speed control signal, and a control unit for storing the audio data received from the signal processing unit in the ESP memory unit, An impact detection unit for detecting an amount of impact caused by the impact of the set, a Q signal and TOC information from the signal processing unit, and receiving a command from the key input unit to control the entire system And a control unit for controlling on / off of the SEP function according to the impact detection signal.

Description

CDP's ESP automatic switching device and its method

Since this is a trivial issue, I did not include the contents of the text.

FIG. 2 is a block diagram of an ESP automatic switching device of the CDP according to the present invention; FIG.

FIG. 3 is a detailed view of the impact sensing unit of FIG. 2;

Fig. 4 is a waveform diagram of the output voltage of the impact sensing part of Fig. 2; Fig.

FIG. 5 is a first flowchart of a process of automatically switching an ESP of a CDP according to the present invention; FIG.

FIG. 6 is a second flowchart of a process of automatically switching an ESP of a CDP according to the present invention; FIG.

Claims (4)

A signal processing unit 106 for demodulating the EFM signal read by the pickup unit 101 into an original signal, correcting errors, transmitting a control signal to the servo unit 102 and the control unit 104, and transmitting the audio data to the memory control unit 106 A servo unit 102 for controlling the servo in accordance with the control signal received from the signal processing unit 4 and the control signal from the control unit 5 and controlling the reproduction speed in accordance with the reproduction speed control signal, A memory control unit 106 for storing the audio data received from the signal processing unit 103 in accordance with the control signal of the control unit 103 in the ESP memory unit 105 and outputting the audio data in accordance with the audio reproduction time, An ESP memory 105 for storing audio data under the control of the memory controller 106, a digital / analog converter 107 for converting the digital audio signal output from the memory controller 106 into an analog signal, In the portion 107 An audio output unit 108 for outputting a compressed audio signal, an impact sensing unit 111 for sensing an impact amount according to an impact of the set, a key input unit 109 And a control unit 104 for controlling the entire system in response to a user's command from the control unit 104 and controlling on / off of the ESP function according to an impact detection signal. . The apparatus of claim 1, wherein the impact sensing unit (111) comprises a laser diode (LD) for emitting light, a photodiode (PD) for receiving light, a photodiode (PD) And a direct ray interrupter 111b interposed between the laser diode LD and the photodiode PD for controlling the amount of light passing through by the vibration caused by the external impact. Device. When the play key is input, performing a 2x speed playback and storing the audio data read from the disc in the ESP memory in full; If the audio data is stored in the ESP memory unit as a whole, controlling the servo unit to switch playback at 1x speed; A third step of detecting whether the servo off period lasts for a predetermined time due to an external impact; and, if the servo off signal continues for a predetermined time or longer, the servo unit is turned on to search for an impacted point and reproduced at 2x speed, A fourth step of storing the data as a pool; And a fifth step of controlling the servo unit to switch the double speed reproduction to the 1x speed if the servo off signal does not last for a predetermined time. If the play key is input, performing a 2x speed playback and storing the audio data read from the disc in the ESP memory unit in a full manner; A second step of controlling the servo unit to switch to 1x speed playback if audio data is stored in the ESP memory unit in full; A third step of comparing an impulse amount Vo detected from the impact sensing part when an impact occurs and an ESP reference voltage at which the servo is off; If the impact amount is greater than the ESP reference voltage, turning on the servo unit to search for a shocked position to perform double speed playback and storing audio data in the ESP memory unit; And a fifth step of controlling the servo unit to switch the 2x speed reproduction to the 1x speed reproduction if the impact amount is smaller than the ESP reference voltage. ※ Note: It is disclosed by the contents of the first application.