US Patent No: 5,027,235

Number of patents in Portfolio can not be more than 2000

Method for controlling a dynamic tracking head of a digital video tape recorder

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Abstract

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In a method for controlling a dynamic tracking head so as to reproduce a digital video signal from a field video signal recorded on a plurality of segmented video tracks formed on a video tape, the rotation speed of a drum carrying the heads is increased to cause such heads to precisely trace the plurality of video tracks forming one field video signal in a reduced time so as to provide enough time for the video heads to jump from the end portion of the current video tracks to the beginning portion of the next video tracks.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SONY CORPORATIONTOKYO, JP27337

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Furuyama, Takenori Kanagawa, JP 1 34

Cited Art Landscape

Patent Info (Count) # Cites Year
 
AMPEX CORPORATION (1)
* 4,933,784 Automatic head position tracking system for video signals recorded in a segmented format 16 1988
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
HITACHI AMERICA, LTD. (23)
* 5,444,575 Method for recording digital data using a set of heads including a pair of co-located heads to record data at a rate lower than the full recording rate possible using the set of heads 18 1994
* 5,805,762 Video recording device compatible transmitter 151 1994
* 5,933,567 Method and apparatus for controlling the position of the heads of a digital video tape recorder during trick play operation and for recording digital data on a tape 15 1994
* 5,778,143 Method and apparatus for the selection of data for use in VTR trick playback operation in a system using progressive picture refresh 33 1994
* 5,717,816 Method and apparatus for the selection of data for use in VTR trick playback operation in a system using intra-coded video frames 32 1994
* 5,887,115 Method and apparatus for implementing a video tape recorder for recording digital video signals having either a fixed or variable data transmission rate 9 1994
* 5,493,456 Method and apparatus for increasing the recording time of a digital video tape recorder 25 1995
* 5,668,918 Method for recording digital data using a series of adjacent heads of alternating azimuths located on a headwheel to record data at a rate that is less than the full recording rate possible using the heads 6 1996
* 5,726,711 Intra-coded video frame data processing methods and apparatus 54 1996
* 5,673,358 Method for generating a reduced rate digital bitstream by selecting data as a function of the position within an image to which the data corresponds 10 1996
* 6,025,878 Method and apparatus for decoding both high and standard definition video signals using a single video decoder 38 1997
* 6,023,553 Method and apparatus for achieving video data reduction through the use of re-encoding 56 1997
6,262,770 Methods and apparatus for decoding high and standard definition images and for decoding digital data representing images at less than the image's full resolution 7 1998
* 6,122,321 Methods and apparatus for reducing the complexity of inverse quantization operations 15 1998
6,385,248 Methods and apparatus for processing luminance and chrominance image data 38 1998
* 6,148,032 Methods and apparatus for reducing the cost of video decoders 7 1998
* 6,141,486 Methods and apparatus for recording digital data including sync block and track number information for use during trick play operation 38 1999
* 6,061,402 Methods and apparatus for efficiently decoding bi-directionally coded image data 59 1999
* 6,167,089 Reduced cost methods and apparatus for decoding bi-directionally coded image data 6 2000
6,249,547 Methods and apparatus for decoding high definition and standard definition digital video images using a single decoder apparatus 9 2000
6,563,876 Methods and apparatus for decoding and displaying high definition and standard definition digital video images at standard definition resolution 15 2001
7,173,970 Methods and apparatus for decoding and displaying multiple digital images in parallel 4 2002
7,295,611 Methods and apparatus for decoding and displaying different resolution video signals 2 2006
 
HITACHI, LTD. (6)
* 5,377,051 Digital video recorder compatible receiver with trick play image enhancement 442 1993
* 5,623,344 Digital video recording device with trick play capability 29 1994
* 5,576,902 Method and apparatus directed to processing trick play video data to compensate for intentionally omitted data 71 1994
* 5,729,648 Method and apparatus for selecting encoded video data for use during video recorder trick play operation 31 1995
* 5,687,275 Trick play data indentification methods and apparatus for use with digital video recording and playback devices 46 1995
* 5,729,649 Methods and apparatus for recording data on a digital storage medium in a manner that facilitates the reading back of data during trick play operation 41 1996
 
AMPEX CORPORATION (1)
* 5,341,251 Data recording system having longitudinal tracks with recordable segments 8 1992
 
HITACHI CONSUMER ELECTRONICS CO., LTD. (1)
* 5,583,650 Digital recording and playback device error correction methods and apparatus for use with trick play data 23 1995
 
Hitachi of America, Ltd. (1)
* 6,100,932 Methods and apparatus for efficiently storing reference frame data and using the stored data to perform motion compensated predictions 11 1998
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
* 5,778,138 Magnetic recording and reproduction apparatus for preventing fixed pattern noise from appearing in a reproduced image when reproducing at high speed 1 1996
 
SANYO ELECTRIC CO., LTD. (1)
* 5,136,391 Digital video tape recorder capable of accurate image reproduction during high speed tape motion 104 1989
* Cited By Examiner