Editing apparatus and method in video tape duplicating system

An editing method for operating an audio/video information duplicating system including a recording system having a recording deck driver and a playback system having a playback deck driver, said recording system and playback system being formed in a unit, a dubbing portion, a display, a key input, an edit adjuster, and a system controller, said method comprising the steps of:

• setting an editing section by marking starting and ending points of at least one section to be edited in a program recorded on a first recording medium in a playback deck through said key input;
• detecting marking information pertaining to said starting point set in the step of setting said editing section while fast forwarding said first recording medium, stopping and then rewinding said first recording medium a predetermined interval after detecting said marking information pertaining to said starting point, and placing said playback system in a play mode until said marking information pertaining to said starting point is again detected;
• performing a first editing comprising:
• automatically duplicating a signal reproduced in said playback system onto a second recording medium in said recording system, returning to the step of detecting said marking information upon detection of said ending point, and continuously checking for said marking information from an initial point to a final point of said first recording medium in said playback deck;
• said first editing performed in response to said edit adjuster performing the steps of:
• generating a first toggled signal in response to a start mark information signal,
• generating a second toggled signal in response to an end mark information signal,
• comparing a record mode signal indicating an editing mode of said editing apparatus and said first toggled signal to generate a first intermediate signal,
• comparing said record mode signal and an index information signal indicating setting of said editing section to be reproduced to generate a second intermediate signal,
• comparing said first and second intermediate signals to generate a third intermediate signal,
• comparing said record mode signal and said second toggled signal to generate a fourth intermediate signal, and
• comparing said third and fourth intermediate signals to generate a first mode control signal controlling operation of said playback system means and said recording system means.

An editing apparatus used to duplicate audio and video signals from a first recording medium to a second recording medium, said editing apparatus comprising:

• playback means for reproducing the audio and video signals from the first recording medium to generate reproduced signals, and for writing starting and ending points of a section of the first recording medium that is to be duplicated onto the second recording medium;
• recording means for recording said reproduced signals onto the second recording medium;
• dubbing means for transferring said reproduced signals from said playback means to said recording means;
• information reception means for receiving user designated commands designating said section of the first recording medium to be duplicated onto the second recording medium, to generate command signals;
• system control means for receiving starting and ending point indication signals from said playback means and said command signals, for generating starting and ending mark information signals in response to said starting and ending point indication signals, respectively, and for controlling said playback means, recording means and dubbing means;
• and
• edit mode control for controlling modes of operation of said playback means and recording means in response to said starting and ending mark information signals;
• said edit mode control means comprising:
• first toggle switch means for generating a first toggled signal in response to said start mark information signal;
• second toggle switch means for generating a second toggled signal in response to said end mark information signal;
• first logic means for comparing a record mode signal indicating an editing mode of said editing apparatus and said first toggled signal to generate a first intermediate signal;
• second logic means for comparing said record mode signal and an index information signal indicating setting of said section to be reproduced, to generate a second intermediate signal;
• third logic means for comparing said first and second intermediate signals to generate a third intermediate signal;
• fourth logic means for comparing said first and second toggled signals to generate a fourth intermediate signal;
• fifth logic means for enabling said transfer of said reproduced signals from said playback means to said recording means by comparing said third and fourth intermediate signals to generate a first mode control signal controlling operation of said playback means and recording means;
• sixth logic means for enabling said playback means to fast forward means to fast forward said first recording medium to said starting point of said editing section by comparing said first mode control signal from said fifth logic means and an automatic/manual control signal indicating said editing mode to generate a second mode control signal controlling said playback means.

An editing method of duplicating audio and video signals from a first recording medium controlled by playback means to a second recording medium controlled by recording means, said editing method comprising the steps of:

• designating a section of the first recording medium to be duplicated onto the second recording medium;
• rewinding the first recording medium;
• fast-forwarding the first recording medium;
• searching for a starting point of said designated section to be duplicated;
• stopping the first recording medium upon detection of the starting point;
• rewinding the first recording medium until approximately one frame before the starting point;
• stopping the first recording medium;
• playing the first recording medium;
• detecting the starting point of the first recording medium a second time;
• duplicating the audio and video signals from the first recording medium to the second recording medium;
• detecting an ending point of said designated section to be duplicated;
• and
• terminating said step of duplicating the audio and video signals from the first recording medium to the second recording medium;
• said editing method enabled by an edit adjuster:
• generating a first toggled signal in response to a start mark information signal,
• generating a second toggled signal in response to an end mark information signal,
• comparing a record mode signal indicating an editing mode of an editing apparatus and said first toggled signal to generate a first intermediate signal,
• comparing said record mode signal and an index information signal indicating setting of said section to be duplicated to generate a second intermediate signal,
• comparing said first and second intermediate signals to generate a third intermediate signal,
• comparing said record mode signal and said second toggled signal to generate a fourth intermediate signal, and
• comparing said third and fourth intermediate signals to generate a first mode control signal controlling operation of said playback means and said recording means.

The method as claimed 16, wherein:

• said step of marking said starting point on the first recording medium comprises:
• changing a first control pulse duty ratio to a starting point duty ratio;
• and said step of marking said ending point on the first recording medium comprises:
• changing a second control pulse duty ratio to an ending point duty ratio.

The method as claimed 19, wherein:

• said step of marking said starting point on the first recording medium comprises:
• changing a first control pulse duty ratio to a starting point duty ratio;
• and said step of marking said ending point on the first recording medium comprises:
• changing a second control pulse duty ratio to an ending point duty ratio.