FI920202A - encoding method - Google Patents

encoding method Download PDF

Info

Publication number
FI920202A
FI920202A FI920202A FI920202A FI920202A FI 920202 A FI920202 A FI 920202A FI 920202 A FI920202 A FI 920202A FI 920202 A FI920202 A FI 920202A FI 920202 A FI920202 A FI 920202A
Authority
FI
Finland
Prior art keywords
image
pixel
difference
receiver
binary
Prior art date
Application number
FI920202A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI92271B (en
FI920202A0 (en
FI92271C (en
Inventor
Harry Santamaeki
Original Assignee
Vista Communication Instr Oy I
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vista Communication Instr Oy I filed Critical Vista Communication Instr Oy I
Priority to FI920202A priority Critical patent/FI92271C/en
Publication of FI920202A0 publication Critical patent/FI920202A0/en
Publication of FI920202A publication Critical patent/FI920202A/en
Publication of FI92271B publication Critical patent/FI92271B/en
Application granted granted Critical
Publication of FI92271C publication Critical patent/FI92271C/en

Links

Abstract

The invention concerns a coding method, in particular for coding a live video signal for a narrow transmission channel, by which method each image of the video signal which is to be transmitted is taken for successive processing in such a way that a reference image previously recorded in the image memory is retrieved from the memory and the images are compared with each other and only the changed image areas are transmitted via the transmission channel to the receiver. According to the invention - every image is processed in pixel form (n x m); - the image and the reference image are compared pixel by pixel and on the basis of the differences in their grey tones a difference image is created; - the difference image, which consists of a continual grey tone scale, is quantized in accordance with a pre-set grey tone scale into a number of sub-difference images where each sub-difference image is a binary image, where each pixel has the binary value 1 or 0 depending upon whether or not there is a grey tone in that pixel according to a particular grey tone scale; - all sub-difference images are coded by utilizing the binary image's coding method and transmitted via the transmission channel to the receiver; - the binary images are received in the receiver and decoded by a corresponding binary image decoding method, after which the image information obtained from the image memory of the receiver is updated by the received difference information pixel by pixel and retrieved from the image memory as a video signal for further processing. <IMAGE>
FI920202A 1992-01-16 1992-01-16 encoding method FI92271C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI920202A FI92271C (en) 1992-01-16 1992-01-16 encoding method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI920202A FI92271C (en) 1992-01-16 1992-01-16 encoding method
FI920202 1992-01-16

Publications (4)

Publication Number Publication Date
FI920202A0 FI920202A0 (en) 1992-01-16
FI920202A true FI920202A (en) 1993-07-17
FI92271B FI92271B (en) 1994-06-30
FI92271C FI92271C (en) 1994-10-10

Family

ID=8534034

Family Applications (1)

Application Number Title Priority Date Filing Date
FI920202A FI92271C (en) 1992-01-16 1992-01-16 encoding method

Country Status (1)

Country Link
FI (1) FI92271C (en)

Also Published As

Publication number Publication date
FI92271B (en) 1994-06-30
FI920202A0 (en) 1992-01-16
FI92271C (en) 1994-10-10

Similar Documents

Publication Publication Date Title
US4922510A (en) Method and means for variable length coding
KR970060176A (en) Encoding device, encoding method, transmission device, transmission method and recording medium
DK0467040T3 (en) Adaptive motion compensation for digital television
KR950010645A (en) Layer Encoding and Decoding Device for Digital Video Signal
UA37185C2 (en) Device for coding video signal bearing image, receiver of television signal, including header data and useful data in the form of compressed videodata
KR960706268A (en) QUADTREE-STRUCTURED WALSH TRANSFORM VIDEO / IMAGE CODING
KR930019011A (en) Efficient 2D Scan Selection Circuit for Image Coding
MX9801191A (en) Video coder employing pixel transposition.
MX9603108A (en) Apparatus and method to encode and decode digital video data.
KR910007370A (en) Video signal coding method
KR960036708A (en) Encoding / Decoding System for Encoding / Decoding Video Signals with Still Images
DK0588410T3 (en) System comprising a first encoder for encoding a first digital signal and a second encoder for encoding a second digital signal (for example, a stereoscopic video signal)
KR960036649A (en) Bitplan Compression Transmission Device Using Binary Image
CA2101832A1 (en) Method and apparatus for encoding and decoding digital image data
EP0840519A3 (en) Apparatus and method of coding/decoding moving pictures
FI920202A (en) encoding method
GB1526288A (en) Facsimile coding
WO1993004572A3 (en) Coding of images and originals, for example for telefax and colour television
EP0896482A3 (en) Digital signal recording apparatus
GB2009568A (en) Picture signal coding apparatus
ES2074501T3 (en) PROCEDURE FOR THE FORMATION OF A PREDICTION IMAGE.
KR970060954A (en) Variable length coding and variable length decoding system
CA2491625A1 (en) Method for coding and decoding digital data stored or transmitted according to the pixels method for transmitting prioritized pixels
KR0153997B1 (en) Apparatus for transmitting bitplane compressed by means of data codebook
KR970706698A (en) Method for compressing and encoding digital image video signals using co-encoding of blocks from multiple pictures

Legal Events

Date Code Title Description
FG Patent granted

Owner name: VISTA COMMUNICATION INSTRUMENTS OY/INC.

BB Publication of examined application
MM Patent lapsed