Goldstar, Co., Ltd.

Lg Electronics Inc.

Man Chul Choi

Soon Ki Lim

Tae Joon Park

Soo K Kim

Yung Gil Kim

Mun C Joung

Sang Joon Woo

Dong Hwa Lee

Doo Hee Lee

Jae Ryong Kim

Joong K Joh

Je Hyoung Lee

Yoon S Seoh

Yong Hyu Shin

Yong Hoo Sheen

Joong Kwon Joh

Tae Kyung Kwon

Sang Mun Lee

Tae Suck Bark

Seungil Kim

Je Hun Lee

Young Jun Choi

Tae Seok Yang

Sang J Woo

Ho Won Lee

Dohyeon Cho

Kwan-Bo Shim

Kyoung Il Min

Kyoung Ii Min

A video signal recording and reproducing apparatus for a digital video cassette tape recorder by which it is possible to judge the transmission amount of the digital data inputted from a digital source, the type of the video tape, and whether or not the tape is recorded in accordance with the judgment result, for thus automatically controlling a recording mode and a reproducing mode, which includes a tape type detector for judging a tape type in accordance with a recordable wavelength of the video tape on which a digital signal is recorded; a data rate detector for detecting and judging a data transfer rate of a digital signal, and a controller for varying a recording or reproducing speed in accordance with the judged tape type and the data transfer rate of the digital signal.

Video signal recording and reproducing apparatus for digital video

An improved video signal recording and reproducing apparatus for a digital video cassette tape recorder by which it is possible to divide, record and reproduce a digital video signal on a low density video tape into multiple tracks based on the amount of data recordable on one track of a high density video tape by controlling a recording/reproducing speed and a tape running speed in accordance with a judgement of the type of the video tape having a predetermined recordable wavelength. The apparatus includes a detector for detecting the type of the video tape in accordance with a recordable wavelength of the video tape, a judgement section for judging the type of the tape by receiving a detected tape type signal from the detector, and a controller for controlling a recording and reproducing speed in accordance with the judged tape type.

Tape-independent video signal recording and reproducing apparatus

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

This invention relates to automatic tracking devices of digital VCRs which is provided to have a capability of precise control of the tracking by detecting rate of error due to variation of tracking of a rotating head. The devices comprise a pre-amplification part for amplifying reproduction signals scanned at a rotating head of a head drum to any level in reproduction, a modulation and demodulation part for restoring amplified reproduction signals in the pre-amplification part into digital signals, a format and deformat part for arraying the digital signals restored in the modulation and demodulation part to original signals, an error correction part for detecting presence of errors caused during recording in the digital signals arrayed by the format and deformat part and generating correctable and incorrectable control signals according to the rate of error detected, and an automatic tracking control part for controlling the tracking through a servo system by generating tracking data according to the rates of error obtained through addition of different weightings to each of the control signals transmitted thereto from the error correction part.

Automatic tracking control device which uses different weightings with a

A recording apparatus for a high definition video cassette recorder, comprises a tape discriminator for checking for the presence of a hole on a specified position of a tape to discriminate whether the tape is of the normal-VHS type or the super-VHS type, a clock signal generator for generating a clock signal of a desired period in response to an output signal from the tape discriminator, a frequency divider for frequency-dividing the clock signal from the clock signal generator by an integer N, a first switch for selecting either the clock signal from the clock signal generator or the frequency divided clock signal in response to the output signal from the tape discriminator, a video data separator for separating intra-frame data and inter-frame data from an input digital video signal in response to the clock signal selected by the first switch and outputting the separated intra-frame data, a second switch for selecting either the input digital video signal or the intra-frame data from the video data separator in response to the output signal from the tape discriminator, a video data formatter for formatting an output signal from the second switch in response to the clock signal from the first switch and the output signal from the tape discriminator, a recording amplifier for amplifying an output signal from the video data formatter, and a head for recording an output signal from the recording amplifier on the tape.

Recording apparatus and method for a high definition video cassette

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

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Seoul, South Korea

Man Chul Choi