Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1998-04-10
2001-04-24
Chevalier, Robert (Department: 2612)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C360S069000
Reexamination Certificate
active
06222984
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a service mode of a video cassette tape recorder, and more particularly to a method and apparatus for interactively checking an error of a system following instruction pictures on a television screen by using a remote controller during a test or a repair thereof.
2. Description of the Prior Art
A video cassette tape recorder is designed and manufactured with a spec adequate to a received television broadcasting type. Accordingly, manufacturers of the video cassette tape recorder adopt a scheme for improving a productivity by an unification and a standardization of components thereof in order to produce various products adequate to various broadcasting types in one processing line.
Therefore, the manufacturers must consider early on in a development stage that several similar broadcasting type sets can be manufactured by one processing line by adding options to a conventional broadcasting type set. So, researchers have invested a relatively long amount of time and effort in developing test products corresponding to various options and in testing the same.
In the development of the products, the testing thereof or an after service, a technique for systematizing an error check of the sets to improve the workability has been required.
U.S. Pat. No. 5,604,647 discloses a technique for systematizing the error check of the sets. The error check systematizing technique is adopted to products so as to be efficiently utilized in the after service.
U.S. Pat. No. 5,506,892 discloses a technique capable of checking and adjusting the video cassette tape recorder from a remote location by using a telephone line.
However, so far, there is no way to easily check an error of a set without any special testing instruments and to display the check result thereof in detail.
SUMMARY OF THE INVENTION
The present invention is intended to overcome the above described disadvantages. Therefore, it is an object of the present invention to provide a method and an apparatus for interactively checking an error of a video cassette tape recorder without any special instruments.
In order to achieve the object of the present invention, there is provided a method for interactively checking an error of a video cassette tape recorder, which comprises: checking whether a service mode is selected by a first remote controller input; displaying a menu picture on a television screen if the service mode is selected; checking whether an error check mode in the menu picture is selected by a second remote controller input; displaying an error check mode picture on the television screen if the error check mode is selected, carrying out a first check operation about a reproducing system and storing a first check result into a memory; displaying an insertion request picture which requests an insertion of a test video cassette on the television screen when the first check operation is finished; carrying out a second check operation about the reproducing system while a reproduction operation is going on after the test video cassette is inserted and storing a second check result into the memory; carrying out each operation mode sequentially after the second check operation is finished, carrying out a third check operation about the reproducing system and storing a third result into the memory; and displaying the first, second and third check results stored in the memory on the television screen after the third check operation is finished.
Also, the apparatus for interactively checking an error of a video cassette tape recorder has an input means for inputting a remote controller signal; on-screen generating means for outputting an on-screen picture signal onto a television screen by inputting an on-screen data; a deck section for generating a capstan motor frequency pulse, a drum motor frequency pulse, a takeup reel pulse, a supply reel pulse and a cam data; a video processing section for generating a control pulse and a DC-envelop signal reproduced from a test video tape; and a control section for checking whether a service mode is selected by a remote control signal by the input means, displaying a menu picture on the television screen by the on-screen generating means if the service mode is selected, checking whether an error check mode in the menu picture is selected, displaying an error check mode picture on the television screen if the error check mode is selected, carrying out a first check operation about the deck section, storing a first check result into a memory, displaying an insertion request picture which requests an inserting of a test video cassette on the television screen, carrying out a second check operation about the deck section and the video processing section while a reproduction operation is going on after the test video cassette is inserted, storing a second check result into the memory, carrying out each operation mode sequentially, carrying out a third check operation about the deck section, storing a third result into the memory; and displaying the first, second and third check results stored in the memory on the television screen.
REFERENCES:
patent: 5053906 (1991-10-01), Rayis
patent: 5469308 (1995-11-01), Hamoda et al.
patent: 5483391 (1996-01-01), Gweon et al.
patent: 5506892 (1996-04-01), Kojima et al.
patent: 5604647 (1997-02-01), Jo
Jeong Byoung-Chul
Kim Chang-Jin
Chevalier Robert
Daewoo Electronics Co. Ltd.
Pillsbury & Winthrop LLP
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