Copy timing control circuit for double-deck video cassette recorder

• US 5,282,093 A
• Filed: 06/28/1991
• Issued: 01/25/1994
• Est. Priority Date: 07/04/1990
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Cho, Nam Y.
• Primary Examiner(s): Pascal, Robert J.
• Assistant Examiner(s): DINH, TAN X
• Application Number:
  US07/723,256
• Time in Patent Office: 942 Days
• Field of Search: 360/15, 360/13, 369/84, 369/83, 358/335
• US Class Current: 386/235
• CPC Class Codes: G11B 15/00 Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function driving or guiding heads G11B3/00 - G11B7/00, G11B21/00
• CPC Class Codes: G11B 15/026 by using processor, e.g. microcomputer
• CPC Class Codes: G11B 15/1875 adaptations for special effects or editing signal processing or indexing therefor G11B27/00
• CPC Class Codes: G11B 2220/455 said record carriers being in one device and being used as primary and secondary/backup media, e.g. HDD-DVD combo device, or as source and target media, e.g. PC and portable player
• CPC Class Codes: G11B 2220/90 Tape-like record carriers
• CPC Class Codes: G11B 2220/91 Helical scan format, wherein tracks are slightly tilted with respect to tape direction, e.g. VHS, DAT, DVC, AIT or exabyte
• CPC Class Codes: G11B 27/002 Programmed access in sequence to a plurality of record carriers or indexed parts, e.g. tracks, thereof, e.g. for editing; transfer of record carriers from magazine G11B15/68, G11B17/10; G11B17/22
• CPC Class Codes: G11B 27/024 on tapes G11B27/028, G11B27/029 take precedence
• CPC Class Codes: G11B 27/028 with computer assistance
• CPC Class Codes: G11B 27/10 Indexing; Addressing; Timing or synchronising; Measuring tape travel

Abstract

A copy timing control circuit capable of concurrently controlling a copy operation timing of one video deck by application of control signals supplied from a mode switch of the other video deck as well as a timing signal thereof. The copy timing control circuit used in a double-deck video cassette recorder having at least two video cassette decks capable of tape-to-tape copying of video data therebetween, is provided with a mode signal input means for receiving a plurality of mode selection signals produced by application of mode switches in either one of the video cassette decks, a copy signal input means for receiving a copy signal produced by application of a copy key, a microprocessor (15) operably connected to the mode signal input means and the copy signal input means for producing a servo control signal dependent upon receipt of a given state of the mode selection signals and the copy signal, and two servo motor drivers (5,10), connected to receive the servo control signal, for controlling the drive of the respective video cassette deck in response to the servo control signal.

Claims

1. A copy timing control circuit for a double-deck video cassette recorder having at least two video cassette decks capable of tape-to-tape copying, said circuit comprising:

mode signal input means for generating first and second mode selection signals indicative of user selected operational modes of a first video cassette deck and a second video cassette deck, respectively;

copy signal input means for generating a copy signal indicative of user selection of a copy mode;

control means operably connected to said mode signal input means and said copy signal input means, for producing servo control signals to enable a playback mode of said second video cassette deck and to enable a record mode of said first video cassette deck in response to receipt of said copy signal when said first mode selection signals are indicative of a record pause mode of said first video cassette deck and said second mode selection signals are indicative of one of a playback mode and a still mode of said second video cassette deck, and for producing said servo control signals to enable a record mode of said second video cassette deck in response to receipt of said copy signal when said first mode selection signals are indicative of a stop mode of said first video cassette deck;

first motor driving means, connected to receive said servo control signals, for controlling driving of said first video cassette deck in response to said servo control signals; and

second motor driving means, connected to receive said servo control signals, for controlling driving of said second video cassette deck in response to said servo control signals.

2. A circuit as claimed in claim 1, further comprised of said control means producing said servo control signals to enable said record mode of said second video cassette deck in response to receipt of said copy signal when said first mode selection signals are indicative of a playback mode of said first video cassette deck.

3. A circuit as claimed in claim 1, further comprised of said control means producing said servo control signals to enable said playback mode of said second video cassette deck in response to receipt of said copy signal when said first mode selection signals are indicative of said record pause mode of said first video cassette deck.

4. A circuit as claimed in claim 1, further comprised of said control means for producing said servo control signals to enable said record mode of said second video cassette deck in response to receipt of said copy signal when said first mode selection signals are indicative of one of a rewind picture search mode and said record pause mode of said first video cassette deck.

5. A circuit as claimed in claim 2, further comprised of said control means producing said servo control signals to enable said record mode of said second video cassette deck in response to receipt of said copy signal when said first mode selection signals are indicative of a playback mode of said first video cassette deck.

6. A circuit as claimed in claim 5, further comprised of said control means producing said servo control signals to enable said playback mode of said second video cassette deck in response to receipt of said copy signal when said first mode selection signals are indicative of said record pause mode of said first video cassette deck.

7. A circuit as claimed in claim 6, further comprised of said control means for producing said servo control signals to enable said record mode of said second video cassette deck in response to receipt of said copy signal when said first mode selection signals are indicative of one of a rewind picture search mode and said record pause mode of said first video cassette deck.

8. A method for controlling a first video cassette deck and a second video cassette deck with common control processor, said method comprising:

enabling a record mode of said first video cassette deck and enabling a playback mode of said second video cassette deck in response to receipt of a user generated copy signal when said first video cassette deck is in a record pause mode and said second video cassette deck is in one of a playback mode and a still mode;

enabling a record mode of said second video cassette deck in response to receipt of said copy signal when said first video cassette deck is in a stop mode;

enabling said record mode of said second video cassette deck in response to receipt of said copy signal when said first video cassette deck is in said playback mode;

enabling said playback mode of said second video cassette deck in response to receipt of said copy signal when said first video cassette deck is in a record pause mode; and

enabling said record mode of said second video cassette deck in response to receipt of said copy signal when said first video cassette deck is in one of a rewind picture search mode and said record pause mode.