KR940003754Y1 - High-speed editing device in audio system - Google Patents

Abstract

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Description

Audio High Speed Editing Device

1 is a schematic block diagram of an apparatus having an audio fast editing function according to the present invention.

2 is a control flowchart for editing audio at high speed according to the present invention.

* Explanation of symbols for main parts of the drawings

5: microcomputer 5: pulse width modulator

7: Camston driver 8: Camston motor

9: camston frequency detector

The present invention relates to an audio high speed editing apparatus for editing audio at high speed by using a synchronous editing function when editing a video tape using a video cassette recorder or a camcorder.

In the current video cassette recorder or camcorder, the editing function can be performed. However, since the editing speed can only be set as the reference speed (SP: 33.35mm / sec, EP: 11.12mm / sec), the editing time may be long.

Therefore, in view of the above situation, the present invention provides a high-speed synchronous editing function for a dubbed set and a reproduced set when a consumer edits using two video cassette recorders or two camcorders or a video cassette recorder and a camcorder. It is an object of the present invention to provide an audio high speed editing apparatus capable of dubbing audio.

The present invention for achieving the above object is a pulse width modulator for receiving a tape speed control signal and pulse width modulated, and the pulse width modulated signal is rotated at a high speed of the input port capstan motor to edit the audio much faster than the reference speed. By configuring the capstan driver to shorten the editing time.

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

1 is a schematic block diagram of an audio high speed editing apparatus according to the present invention, an oscillator (OSC) 1 provides a recording bias to a recording / playback head 2 and an erasing head 3, The switching section 4 provides a recording bias, and the head switching section 4 controls whether to provide a recording signal to the recording head 2 or output an audio signal reproduced from the playback head 3. Done.

In addition, the microcomputer 5 detects a tape speed control signal from a key matrix (not shown) during high-speed editing, and controls a pulse width modulator (PWM) 6 to control a pulse width modulator ( The signal modulated in 6) is provided to the capstan driver 7, which rotates the capstan motor 8 to edit the tape at high speed. In addition, the frequency signal generated when the capstan motor 8 rotates is detected by the capstan frequency detector 9 and provided to the microcomputer 5 so that the microcomputer 5 recognizes it and controls the deck.

Hereinafter, a process of editing audio at high speed will be described with reference to FIG. 2.

2 is a control flowchart for editing audio at high speed according to the present invention. First, when dubbing (editing), a video tape is inserted into a camcorder and / or a video cassette recorder, and a registration editing cable is connected. Perform the edit. Then, the user selects whether the set is a master (M: Master) or a slave (S: Slave) (step 101), wherein the set selected as the master (M) receives the tape speed control signal by the key and the slave The set selected with (S) receives the tape speed control signal received from the master set via the edit cable.

When selecting a master set for high speed dubbing, firstly double the tape speed, triple the speed, and so on. After setting up to n times speed (step 102), the high speed dubbing switch is pressed (step 103). Next, the start and end points of the dubbing are memorized using the counter memory function (step 104, 105).

After that, it is determined whether the master set is to be in the playback mode or dubbed (step 106). When the master set selects playback, the master set is in the playback still operation, and the slave set is in the audio dubbing pause state. (Step 107). When dubbing is selected, the master set performs the audio dubbing pause operation, and the slave set receives the playback (“H”) control signal to perform playback still (step 108).

If the master set is still turned on (step 107) (step 109). At the already set speed, the master set performs the playback operation while the slave set performs the dubbing pose (step 111).

The master set performing the regeneration operation continues to check the memorized count value to determine whether the count value is the same as the memorized value or not (step 113). Takes a dubbing pose (step 115).

If the master set is dubbed on in step 108 (step 110), the master set performs audio dubbing while the slave set takes a still operation (step 112).

After determining whether the count has ended in the same manner as the count of the memory in the master set performing the audio dubbing operation (step 114), the master set takes the audio dubbing pose and the slave set goes into the still operation (step 116).

The present invention, which operates as described above, can dub audio used in camcorders and video cassette recorders at several times the speed, and consumers can also edit audio quickly and quickly.

Claims (1)

An apparatus for editing audio at high speed using two video cassette recorders or camcorders; A microcomputer 5 for controlling the pulse width modulator 6 by a tape speed control signal input through a key matrix, and a pulse width modulator 6 for outputting a pulse width modulated signal under the control of the microcomputer 5; And the capstan motors 7 for capturing audio by rotating the capstan motor 8 at high speed using the above pulse width modulated signal as input. A high speed audio editing apparatus, which enables a desired high speed editing by a microcomputer (5) receiving information on the rotation speed of (8).