Goldstar, Co., Ltd.

Joong K Joh

Mun C Joung

Yoon S Seoh

Soo K Kim

Man Chul Choi

Soon Ki Lim

Yong Hyu Shin

Ho Won Lee

Seungil Kim

Young Jun Choi

Seung Il Kim

Hyun Kyu Park

Weon K Lee

Kwan-Bo Shim

Su K Kim

Kwan B Sim

Dohyeon Cho

An apparatus and a method for discriminating between analog and digital video signals in a high definition VCR are disclosed. The apparatus comprises a playback amplification circuit for amplifying a video signal recorded on a tape played back by a head when a playback mode is selected by the user, a signal detection circuit for detecting a signal from an output signal from the playback amplification circuit, the detected signal being indicative of whether the video signal recorded on the tape is analog or digital, a mode switching control circuit for discriminating in response to an output signal from the signal detection circuit whether the video signal recorded on the tape is analog or digital and outputting a mode switching control signal in accordance with the discriminated result, a switch being switched in response to the mode switching control signal from the mode switching control circuit, and analog and digital playback circuits for playback-processing the output signal from the playback amplification circuit under the control of the switch.

Apparatus and method for discriminating between analog and digital video

An apparatus for recording and reproducing digital/analog video signals including a single head drum attached with heads for processing analog video signals and heads for processing digital video signals, and switches performing switching operations on the basis of the kind of input video signals. The head drum is variable in speed, depending on the kind of input video signals. In accordance with the apparatus, both analog and digital signals can be recorded and reproduced by a single recording unit and a single reproducing unit both capable of varying in characteristic, based on a video signal received thereto. This provides a reduction in manufacture cost and a light, thin, simple and compact construction of the existing VCRs.

Apparatus for recording and reproducing digital and analog video signals

An automatic head cleaning apparatus for a magnetic recording/playback system which has a cleaning roller the vertical position of which is varied so that an area of cleaning member in contact with a head is widened, thereby allowing the useful life of the apparatus to be lengthened. The apparatus comprises an arm pivotably mounted on a pin fixed to base plate which arm is pivoted by being in contact with a moving slant post assembly for causing a tape to be loaded and unloaded on a head drum; an elastic member for biasing the arm in one direction; an operating lever, pivotably mounted on the pin, which is cooperatively connected with the arm; a first member for changing the vertical position of the operating lever in response to a pivoting movement of the operating lever; and a second member for cleaning the head, said second member rotatably mounted on an end of the operating lever which is itself pivoted and moved vertically at the same time, wherein the second member is in contact with the head drum and the head during a tape loading or unloading operation.

Automatic head cleaning apparatus for magnetic recording/playback system

A variable bulge device for displacing bulges of a rotation head drum, capable of adjusting a protruded amount of a bulge used, depending on a rotation speed of the rotating head drum and the kind of a tape used. The device includes an operating member partially protruded at one end thereof through a bulge hole formed at a lower drum of the rotation head drum, the operating member having a variable bulge provided by the protruded end, and a drive unit for driving the operating member and thereby adjusting the protruded amount and position of the variable bulge. For adjusting a protruded amount of a bulge used, depending on a rotation speed of the rotating head drum and the kind of a tape used, the device includes a hollow elastic rubber film partially protruded at an upper end thereof through a bulge hole formed at a lower drum of the rotation head drum, the elastic rubber film having a variable bulge provided by the protruded end, an operating fluid contained in the elastic rubber film, an operating fluid expanding unit adapted to expand the operating fluid and thereby adjust the protruded amount of the variable bulge.

Variable bulge device for rotatable head drum

Growing community of inventors

Seoul, South Korea

Joong K Joh