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Class 386/112 - Digital compressing


Subclass of Class 386 - Television signal processing for dynamic recording or reproducing
Definition: Subject matter wherein the television signal to be compressed
No. of patents: 625
Last issue date: 03/29/2011


                    16  
NumberTitleIssue Date
5047852Adaptive transform encoder for digital image signal in recording/reproducing apparatus
An adaptive transform encoder can keep a recording rate of a digital signal at a constant level. It comprises a unit for orthogonal-transforming one block of digital input signal, a unit for calculating an activity index of the orthogonal-transformed bloc...
09/10/1991
5027214Electronic still camera using variable-length data compression for storing still image signals
An image pick-up section generates an electronic still image signal. An A/D conversion section converts the electronic still image signal generated by the image pick-up section into a digital signal. A data compressing section causes variable-length encod...
06/25/1991
5023710Highly efficient coding apparatus
A highly efficient coding apparatus is configured to divide a digital picture signal into picture blocks and, based on a signal from a coding circuit for performing variable-length coding of each picture block, generate an output signal in the form of ser...
06/11/1991
4943865Method and system for recording standard pulse code modulated serial data using video signal recorders
A method and system of recording on a video signal recorder a serialized stream of pulse code modulated digital data bits. The video signal recorder has multiple record/playback heads and is of the type normally adapted to record video signals such as tel...
07/24/1990
4870509Compact video signal recording and/or reproducing apparatus adapted for external input video signals and variable speed reproduction
An apparatus for recording and/or reproducing video signals is disclosed. First and second video signals from an imaging unit and an external video input, respectively, are coupled to the apparatus. A converter circuit selectively acts to form a time expa...
09/26/1989
4862292Digital information signal recording apparatus
A digital information signal recording apparatus has a first mode in which a digital information signal of one channel is recorded on a recording medium at a given bit rate and a second mode in which digital information signals of n channels (n: an intege...
08/29/1989
4858032Device for extracting still picture frames from a moving image video signal and recording same on a magnetic recording medium
Disclosed herein is a magnetic recording device simple in arrangement, in which, while a motion picture is being recorded, a unitary part of the motion picture is extracted to perform a still picture recording operation with high picture quality....
08/15/1989
4843485Multiple format digital video tape record and replay system
A hierarchy of video standards is provided in a recording format for video record and replay systems to achieve performance flexibility, such as in regard to television studio and portable recording equipment. This recording format divides the tape into a...
06/27/1989
4785358Recording apparatus for recording a video signal obtained from a high speed scanning video camera
A recording apparatus includes a memory circuit for storing a video signal derived from a high speed scanning video camera the scanning speed of which is faster than the scanning speed of a standard television signal and a plurality of rotating magnetic h...
11/15/1988
4730223Method of converting a digital data signal having a first length into a digital data signal having a second length
A method of converting a digital video signal including first words each being composed of N1 bits into a digital video signal which consists of second words each being composed of N2 bits (N2
03/08/1988
4710826Apparatus with liquid crystal display panel, for recording/playing back television signal by utilizing digital audio tape recorder system
A television video signal is compressed to the number of digital video signals sufficient for display of an image on a liquid crystal display. A television audio signal is also sampled and digitized. The television video and audio signals are combined to ...
12/01/1987
4680647Method for recording and reproducing video format signal
A method for recording and reproducing a video format signal on and from a recording medium. A two-dimensional screen is divided based on the video format signal into a plurality of blocks with one of them being divided into a plurality of subblocks, and ...
07/14/1987
4675750Video compression system
Video compression is achieved by taking the Hadamard transform of video data, comparing Hadamard coefficients from consecutive lines, encoding the changed coefficient values via an entropy coding technique, removing superfluous bits and storing the data o...
06/23/1987
4661862Differential PCM video transmission system employing horizontally offset five pixel groups and delta signals having plural non-linear encoding functions
A wide-aspect-ratio HDTV signal having 1600 luminance pixels/32 μS line and 980 lines/frame is data reduced by deleting odd pixels of each line of TV field #1 and even pixels of each line of TV field #2 to produce 800 pixels per line, and is further data...
04/28/1987
4611250Apparatus for recording a video signal
In an apparatus for recording a video signal on magnetic tape which is helically wrapped on a guide drum having single rotary head for scanning the magnetic tape, one field of the video signal is divided into N segments thereof (where N is an integer) and...
09/09/1986
4563710Digital television tape recording
The present invention relates to digital television tape recording and more particularly to such recording using helical scan apparatus of the segmented type i.e. where one field of video is recorded by a plurality of rotations of the headwheel. The inven...
01/07/1986
4554597Memory utilization control system for compressed digital picture data transmission system
An improved memory utilization control system for compressed digital picture data transmission systems, comprises an input terminal coupled to the memory circuit having a capacity of one frame, an address signal generator generating an address signal whic...
11/19/1985
4513328Method of recording video signals within a predetermined bit/unit time recording rate
Digital data are stored on a magnetic tape at a bit rate which does not exceed the storage capabilities of the tape of about 80 Mbit/s, although received digital video signals have a bit rate of about 100 Mbit/s per channel in a two-channel system. In ord...
04/23/1985
4480272System of recording and playback of digitally recorded signals, especially television
Four magnetic heads are provided on a rotary mount equally spaced around the circumference, so when they are rotated to scan a tape wound around the headwheel in half a turn of a helix, each oblique track on the tape corresponds to half a revolution of th...
10/30/1984
4425588Processing of digital signals
Apparatus is disclosed for use in a digital signal transmission or recording system, particularly for video signals where, as is customary, the number of digital signals (i.e., digital words) is reduced (for example, by a factor of 2) prior to transmissio...
01/10/1984
4417276Video to digital converter
A method and apparatus by which video signals can be converted to digitized values and stored in memory. Means are provided for continuous digitization of successive images which may be stored in computer memory in real time. Additionally, means are provi...
11/22/1983
4412252Image reduction system
A system is provided for reducing the total information contained in an image in order to reduce the size of the image. In an image comprising a number of lines, each line including a plurality of dots, first reduction means deletes data representing a pr...
10/25/1983
4210931Video player and/or recorder with Hadamard transform
An apparatus for performing a Hadamard transform on video data for compression of data to be recorded and decompression of data read from a record for display achieves the necessary high rate by means of two or more adders and two subtractors operating in...
07/01/1980
4183065Video recording apparatus which samples and quantizes low frequencies and then groups and records an analog representation thereof
Apparatus for directly recording television signals on a magnetic medium strips out sync and blanking information. Low frequency components of the television signals are time compressed, i.e. frequency shifted, and recorded as a substitute for the strippe...
01/08/1980
                    16  
 
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