Lg Electronics Inc.

Goldstar, Co., Ltd.

Tae Seok Yang

Soo K Kim

Sang Joon Woo

Je Hyung Lee

Je Hun Lee

Sang J Woo

Dong Hyun Lee

Seung Il Kim

Choon Lee

Doo Hee Lee

Man Chul Choi

Young Joon Choi

Gook H Jang

Soo Kyung Kim

An apparatus and method for controlling recording and reproduction in a video cassette tape recorder are disclosed apparatus is capable of, in a recording mode, separating specific data for speed-varied reproduction from compressed digital video signals, recording them on designated tracks, recording position information of the designated tracks on a control track by an index head or recording position information of recording position-synchronized blocks at the starting portions of the designated tracks recorded with the specific data, and in a speed-varied reproduction mode, controlling a capstan servo speed so as to maintain the travel of a magnetic tape at a normal speed and periodically or non-periodically accelerate or decelerate it where specific data for varied-speed have been recorded periodically or non-periodically on predetermined portions of tracks, thereby making heads travel repeatedly at the normal speed and the high speed and thereby detect continuously the specific tracks for varied-speed. A repeatability of reproduced video at a varied speed is obtained without any deterioration in picture quality, because of recording of the specific data for speed-varied reproduction and the continuous detection of the specific data in the speed-varied reproduction.Apparatus and method for controlling recording and/or reproduction of digital signals to and/or from a digital storage medium, are discussed. According to an embodiment, receiving the digital data, the digital data including video data compressed as at least one of intra-frame and predictive frame, stuffing data, synchronous signals, identification signals, and relative position information associated with an I-frame; detecting the synchronous signals and the identification signals for decoding the video data; obtaining the video data from the digital data by removing the stuffing data based on stuffing code information; determining a position associated with the I-frame by using the relative position information; determining whether a speed-varied reproduction mode is selected; and reproducing the video data based on the determined position associated with the I-frame, the synchronous signals, the identification signals, and a result of the step of determining whether the speed-varied reproduction mode is selected.

Apparatus and method for recording or reproducing digital data using speed information

An apparatus and method for controlling recording and reproduction in a video cassette tape recorder are disclosed apparatus is capable of, in a recording mode, separating specific data for speed-varied reproduction from compressed digital video signals, recording them on designated tracks, recording position information of the designated tracks on a control track by an index head or recording position information of recording position-synchronized blocks at the starting portions of the designated tracks recorded with the specific data, and in a speed-varied reproduction mode, controlling a capstan servo speed so as to maintain the travel of a magnetic tape at a normal speed and periodically or non-periodically accelerate or decelerate it where specific data for varied-speed have been recorded periodically or non-periodically on predetermined portions of tracks, thereby making heads travel repeatedly at the normal speed and the high speed and thereby detect continuously the specific tracks for varied-speed. A repeatability of reproduced video at a varied speed is obtained without any deterioration in picture quality, because of recording of the specific data for speed-varied reproduction and the continuous detection of the specific data in the speed-varied reproduction.Apparatus and method for controlling recording and/or reproduction of digital signals to and/or from a digital storage medium, are discussed. According to an embodiment, the method includes receiving digital data, the digital data including video data compressed as at least one of intra-frame and predictive frame, stuffing data, synchronous signals, and relative position information associated with an I-frame; detecting the synchronous signals for decoding the video data; obtaining the video data from the digital data by removing the stuffing data based on stuffing code information; determining a position associated with the I-frame by using the relative position information; determining whether a speed-varied reproduction mode is selected for reproduction of the video data in a varied speed; and reproducing the video data based on the determined position associated with the I-frame, the synchronous signals, and a result of the step of determining whether the speed-varied reproduction mode is selected.

An apparatus and method for controlling recording and reproduction in a video cassette tape recorder are disclosed apparatus is capable of, in a recording mode, separating specific data for speed-varied reproduction from compressed digital video signals, recording them on designated tracks, recording position information of the designated tracks on a control track by an index head or recording position information of recording position-synchronized blocks at the starting portions of the designated tracks recorded with the specific data, and in a speed-varied reproduction mode, controlling a capstan servo speed so as to maintain the travel of a magnetic tape at a normal speed and periodically or non-periodically accelerate or decelerate it where specific data for varied-speed have been recorded periodically or non-periodically on predetermined portions of tracks, thereby making heads travel repeatedly at the normal speed and the high speed and thereby detect continuously the specific tracks for varied-speed. A repeatability of reproduced video at a varied speed is obtained without any deterioration in picture quality, because of recording of the specific data for speed-varied reproduction and the continuous detection of the specific data in the speed-varied reproduction.An apparatus, method and storage medium for recording and/or reproducing digital data using relative position data are discussed. According to an embodiment, the apparatus includes: a reproducing unit reading digital video data from a recording medium, the digital video data including: specific data units, each specific data unit including digital specific data including intra-coded digital picture data and header data, wherein the header data includes: a sync code for the digital specific data, identification information, and relative position data associated with the intra-coded digital picture data, wherein the associated relative position data is indicative of a plurality of relative positions from a current nth specific data location on the medium to each of a n+1, n+2, . . . , n+m specific data location on the medium, where m is greater than 2.

Apparatus, method and storage medium for recording and/or reproducing digital data using relative position data

An apparatus and method for controlling recording and reproduction in a video cassette tape recorder are disclosed apparatus is capable of, in a recording mode, separating specific data for speed-varied reproduction from compressed digital video signals, recording them on designated tracks, recording position information of the designated tracks on a control track by an index head or recording position information of recording position-synchronized blocks at the starting portions of the designated tracks recorded with the specific data, and in a speed-varied reproduction mode, controlling a capstan servo speed so as to maintain the travel of a magnetic tape at a normal speed and periodically or non-periodically accelerate or decelerate it where specific data for varied-speed have been recorded periodically or non-periodically on predetermined portions of tracks, thereby making heads travel repeatedly at the normal speed and the high speed and thereby detect continuously the specific tracks for varied-speed. A repeatability of reproduced video at a varied speed is obtained without any deterioration in picture quality, because of recording of the specific data for speed-varied reproduction and the continuous detection of the specific data in the speed-varied reproduction.An apparatus, method and storage medium for recording and/or reproducing digital data using relative position data are discussed. According to an embodiment, the storage medium includes a plurality of specific data units, each specific data unit including digital specific data including intra---

An apparatus and method for controlling recording and reproduction in a video cassette tape recorder are disclosed apparatus is capable of, in a recording mode, separating specific data for speed-varied reproduction from compressed digital video signals, recording them on designated tracks, recording position information of the designated tracks on a control track by an index head or recording position information of recording position-synchronized blocks at the starting portions of the designated tracks recorded with the specific data, and in a speed-varied reproduction mode, controlling a capstan servo speed so as to maintain the travel of a magnetic tape at a normal and periodically or non-periodically accelerate or decelerate it where specific data for varied-speed have been recorded periodically or non-periodically on predetermined portions of tracks, thereby making heads of travel repeatedly at the normal speed and the high speed and thereby detect continuously the specific tracks for varied-speed. A repeatibility of reproduced video at a varied speed is obtained without any deterioration in picture quality, because of recording of the specific data for speed-varied reproduction and the continuous detection of the specific data in the speed-varied reproduction.Apparatus and method for controlling recording and/or reproduction of digital signals to and/or from a digital storage medium are discussed. According to an embodiment, there is provided a method for processing a digital signal stored on a digital storage medium, comprising receiving digital data processed to prevent at least one of buffer underflow and buffer overflow and stuffed by stuffing data capable of being detected and removed, the digital data including video data in a first data format converted from video data in a second data format; determining whether a speed-----

An apparatus and method for controlling recording and reproduction in a video cassette tape recorder are disclosed. Theapparatus is capable of, in a recording mode, separating specific data for speed-varied reproduction from compressed digital video signals, recording them on designated tracks, recording position information of the designated tracks on a control track by an index head or recording position information of recording position-synchronized blocks at the starting portions of the designated tracks recorded with the specific data, and in a speed-varied reproduction mode, controlling a capstan servo speed so as to maintain the travel of a magnetic tape at a normal speed and periodically or non-periodically accelerate or decelerate it where specific data for varied-speed have been recorded periodically or non-periodically on predetermined portions of tracks, thereby making heads travel repeatedly at the normal speed and the high speed and thereby detect continuously the specific tracks for varied-speed. A repeatability of reproduced video at a varied speed is obtained without any deterioration in picture quality, because of recording of the specific data for speed-varied reproduction and the continuous detection of the specific data in the speed-varied reproduction.

Apparatus and method for controlling recording and reproduction in digital recording medium

An apparatus and method for controlling recording and reproduction in a video cassette tape recorder are disclosed apparatus is capable of, in a recording mode, separating specific data for speed-varied reproduction from compressed digital video signals, recording them on designated tracks, recording position information of the designated tracks on a control track by an index head or recording position information of recording position-synchronized blocks at the starting portions of the designated tracks recorded with the specific data, and in a speed-varied reproduction mode, controlling a capstan servo speed so as to maintain the travel of a magnetic tape at a normal speed and periodically or non-periodically accelerate or decelerate it where specific data for varied-speed have been recorded periodically or non-periodically on predetermined portions of tracks, thereby making heads travel repeatedly at the normal speed and the high speed and thereby detect continuously the specific tracks for varied-speed. A repeatability of reproduced video at a varied speed is obtained without any deterioration in picture quality, because of recording of the specific data for speed-varied reproduction and the continuous detection of the specific data in the speed-varied reproduction.Apparatus and method for controlling recording and/or reproduction of digital signals to and/or from a digital storage medium, are discussed. According to an embodiment, there is provided a method for processing a digital signal stored on a digital storage medium, comprising receiving digital data processed based on first timing information and second timing information, the digital data being stuffed by stuffing data capable of being detected and removed, and being processed to prevent at least one of buffer underflow and buffer overflow, wherein the first timing information is multiplexing timing information for a multiplexer, and the second timing information is sync information for video reproduction, and wherein the digital data includes video data; determining whether a speed-----

Apparatus and method for recording or reproducing digital data using timing information and speed information

Apparatus and method for controlling recording and reproduction in digital video cassette tape recorder

A system for a video cassette recorder is capable of recording/reproducing analog video and audio signals as well as digital video and audio signals for a HDTV. The revolution of a head drum may be determined different from each other depending on the selected mode, i.e., digital or analog signal recording/reproducing mode, and thus the digital signal having a different recording bandwidth from the analog signal can be recorded on and reproduced from a conventional analog tape.

System for recording/reproducing both digital and analog signals for a

An index processor and processing method for digital VCR including the steps of: normally recording a user-selected program on video tape in a general recording mode; recording an index input after the program is recorded in an index recording mode, succeeding the end of a final program; normally reproducing a program recorded on video tape in a general playback mode; and reproducing the user-selected program according to the index recorded on video tape in the index reproducing mode, and recording a modified index.

Index processor for digital VCR and method therefor

An apparatus and method for controlling recording and reproduction in a video cassette tape recorder are disclosed apparatus is capable of, in a recording mode, separating specific data for speed-varied reproduction from compressed digital video signals, recording them on designated tracks, recording position information of the designated tracks on a control track by an index head or recording position information of recording position-synchronized blocks at the starting portions of the designated tracks recorded with the specific data, and in a speed-varied reproduction mode, controlling a capstan servo speed so as to maintain the travel of a magnetic tape at a normal speed and periodically or non-periodically accelerate or decelerate it where specific data for varied-speed have been recorded periodically or non-periodically on predetermined portions of tracks, thereby making heads travel repeatedly at the normal speed and the high speed and thereby detect continuously the specific tracks for varied-speed. A repeatability of reproduced video at a varied speed is obtained without any deterioration in picture quality, because of recording of the specific data for speed-varied reproduction and the continuous detection of the specific data in the speed-varied reproduction.

Apparatus and method for controlling recording and reproduction in

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

A signal characteristic variation apparatus for a high definition VCR in which a characteristic of a video signal is varied according to characteristics of a tape and a channel. A predetermined frequency band of test signal is recorded on the tape for recording the tape and channel characteristics in a recording mode. This enables the video signal to be recorded on the tape in the proper mode and permits, in the play-back mode, the tape and channel characteristics to be discriminated by detecting the test signal recorded on the tape. Therefore, the video signal can be played back from the tape with its frequency characteristic properly adjusted according to the discriminated tape and channel characteristics.

Apparatus for a high definition VCR which selects a video signal

This invention relates to a device for correct converting of continuously reproduced serial data to original parallel data by detecting a synchronous signal, including a shift register for delaying serial data by a number of bits of a synchronous signal pattern in accordance with a serial clock, the serial data being reproduced from a magnetic recording medium, a detector for detecting a synchronous signal from an output signal of the shift register, a system controller for generating a predetermined bits interval of a parallel load signal and a parallel clock signal from the synchronous signal in accordance with the serial clock, a parallel shift register for converting the output signal of the shift register to a predetermined bits interval of parallel data in accordance with the parallel load signal, and counter part for counting the parallel clock signal to generate window signals detecting the synchronous signal in a certain period when the detector detects the synchronous signal.

Device for converting data from series to parallel

A method for and an apparatus for correcting errors of compressed digital data, using a dual decoding system for correcting errors generated at the data by adding parity bits having an error correction capability for K symbols to the data fields of the data. Errors of up to K are corrected by the C.sub.1 field- and C.sub.2 field-decodings. After the error correction, a determination is made about the presence of errors in the corrected data so that an erroneous detection and an erroneous correction of errors are prevented, thereby minimizing an influence by an error propagation generated upon the extension of compressed data. The present invention achieves an improvement in error correcting capability for compressed digital image data.

Growing community of inventors

Soengnam-Shi, South Korea

Tae Seok Yang