GB1525264A – Frame-to-frame coding system
– Google Patents
GB1525264A – Frame-to-frame coding system
– Google Patents
Frame-to-frame coding system
Info
Publication number
GB1525264A
GB1525264A
GB42945/75A
GB4294575A
GB1525264A
GB 1525264 A
GB1525264 A
GB 1525264A
GB 42945/75 A
GB42945/75 A
GB 42945/75A
GB 4294575 A
GB4294575 A
GB 4294575A
GB 1525264 A
GB1525264 A
GB 1525264A
Authority
GB
United Kingdom
Prior art keywords
magnitude
code
bit
buffer memory
frame
Prior art date
1974-10-21
Legal status (The legal status 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 status listed.)
Expired
Application number
GB42945/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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.)
1974-10-21
Filing date
1975-10-20
Publication date
1978-09-20
1974-10-21
Priority claimed from JP12116574A
external-priority
patent/JPS5160151A/en
1974-11-18
Priority claimed from JP13201674A
external-priority
patent/JPS5158015A/en
1975-10-20
Application filed by Nippon Telegraph and Telephone Corp
filed
Critical
Nippon Telegraph and Telephone Corp
1978-09-20
Publication of GB1525264A
publication
Critical
patent/GB1525264A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
H04N19/124—Quantisation
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
Abstract
1525264 Television NIPPON TELEGRAPH & TELEPHONE PUBLIC CORP 20 Oct 1975 [21 Oct 1974 18 Nov 1974] 42945/75 Heading H4F Interframe coding system for compressing the bandwidth of a television signal comprises a substractor 3 producing a difference signal between an 8 bit PCM code input video signal from converter 2 and the code of a corresponding position of a preceding frame from a frame memory 4. The output of the substractor is fed to a magnitude adjuster 5 which is controlled 12 in accordance with the prevailing occupancy of a buffer memory 9 which is used for smoothing the transmission bit rate i.e. as the full state of the buffer memory is approached, the magnitude of the difference signal is increasingly attenuated in a digital manner e.g. by ¥, ¢ and . The magnitude controlled difference signal is fed via a threshold circuit 6 to an encoder 7 where it is coded as a 4 bit code indicative of a quantization range in which it falls. This 4 bit code is written into buffer memory 9 and read out at a uniform bit rate for transmission. The 4 bit code is also converted into a 9 bit code (i.e. 8 bit + polarity bit) indicative of a representative level in the respective quantization range, which is supplied to an adder 11 where it is added with output from the frame memory to supply the frame memory input. Overflow of the buffer memory is thus prevented and because a magnitude adjustment rather than a threshold control is effected a blur rather than a stepwise change in the picture is produced upon reproduction of the transmitted signal. To improve the bandwidth compression a variable word length encoder may be connected before the buffer memory. The representative level code supplied by the encoder 7 to the adder 11 may have its magnitude controlled by a second magnitude adjuster in the opposite manner to magnitude adjuster 5, in which case it is necessary to transmit a frame code indicative of this magnitude control to the receiver so that the magnitude of the decoded code may be controlled in accordance therewith. A switching circuit 8 is provided so that the 9 bit PCM codes from five consecutive horizontal scanning lines per frame at the ouptut of adder 11 may be directly supplied to the buffer memory, these lines being shifted for successive frames. This avoids cumulative transmission errors. In addition if no change in the pictures takes place for a prolonged period of time an underflow will occur in the buffer memory with the same data being repeatedly read out. To prevent this occurring the frame memory on the receiver side is refreshed by supplying the PCM code directly into the buffer memory using switching circuit 8 when underflow is detected. Reference is also made to coding every other picture element and/or every other line of picture elements.
GB42945/75A
1974-10-21
1975-10-20
Frame-to-frame coding system
Expired
GB1525264A
(en)
Applications Claiming Priority (2)
Application Number
Priority Date
Filing Date
Title
JP12116574A
JPS5160151A
(en)
1974-10-21
1974-10-21
FUGOKAHOSHIKI
JP13201674A
JPS5158015A
(en)
1974-11-18
1974-11-18
Fureemu memorikakikaeseigyohoshiki
Publications (1)
Publication Number
Publication Date
GB1525264A
true
GB1525264A
(en)
1978-09-20
Family
ID=26458589
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB42945/75A
Expired
GB1525264A
(en)
1974-10-21
1975-10-20
Frame-to-frame coding system
Country Status (6)
Country
Link
US
(1)
US4051530A
(en)
CA
(1)
CA1042097A
(en)
FR
(1)
FR2289070A1
(en)
GB
(1)
GB1525264A
(en)
NL
(1)
NL170583C
(en)
SE
(1)
SE411008B
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2167267A
(en)
*
1984-11-08
1986-05-21
Nec Corp
Method and arrangement for refreshing a frame memory in an interframe encoding system
Families Citing this family (26)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4150397A
(en)
*
1977-09-13
1979-04-17
Eli S. Jacobs
Repetition reduced digital data record and playback system
DE2808640C2
(en)
*
1978-02-28
1983-06-16
Siemens AG, 1000 Berlin und 8000 München
System for the transmission of individual television images
US4271431A
(en)
*
1978-10-11
1981-06-02
Star Systems, Inc.
Scan converter utilizing discrete differentially coded signals
US4302775A
(en)
*
1978-12-15
1981-11-24
Compression Labs, Inc.
Digital video compression system and methods utilizing scene adaptive coding with rate buffer feedback
US4394774A
(en)
*
1978-12-15
1983-07-19
Compression Labs, Inc.
Digital video compression system and methods utilizing scene adaptive coding with rate buffer feedback
US4278996A
(en)
*
1980-04-11
1981-07-14
Bell Telephone Laboratories, Incorporated
Technique for encoding pictorial information
EP0091531B1
(en)
*
1982-04-08
1986-01-22
Losinger AG
Method and apparatus for placing a cover on an underwater structure or on an underwater land strip
DE3310824A1
(en)
*
1983-03-24
1984-09-27
Zdzislaw Toronto Ontario Gulczynski
Video processor
CA1234213A
(en)
*
1984-08-23
1988-03-15
Tooru Yasuda
Interframe encoding system having a buffer simulator
US4695883A
(en)
*
1985-10-24
1987-09-22
Concept Communications, Inc.
Digital video compression system with variable digital filter
DE3670746D1
(en)
*
1985-12-04
1990-05-31
Siemens Ag
METHOD FOR REDUCING DATA FROM DIGITAL IMAGE SIGNALS BY VECTOR QUANTIZATION.
US4679086A
(en)
*
1986-02-24
1987-07-07
The United States Of America As Represented By The Secretary Of The Air Force
Motion sensitive frame integration
DE3774314D1
(en)
*
1986-04-04
1991-12-12
Siemens Ag
METHOD FOR REDUCING DATA FROM DIGITAL IMAGE SIGNALS BY VECTOR QUANTIZATION OF COEFFICIENTS GIVEN BY ORTHONORMAL TRANSFORMATION BY MEANS OF A SYMMETRICAL FAST-CYCLE HADAMARD MATRIX.
DE3613343A1
(en)
*
1986-04-19
1987-10-22
Philips Patentverwaltung
HYBRID CODERS
US4706260A
(en)
*
1986-11-07
1987-11-10
Rca Corporation
DPCM system with rate-of-fill control of buffer occupancy
GB8703354D0
(en)
*
1987-02-13
1987-03-18
British Telecomm
Coder
US4745474A
(en)
*
1987-04-17
1988-05-17
General Electric Company
Two resolution level DPCM system
EP0288963B1
(en)
*
1987-04-28
1995-09-13
Mitsubishi Denki Kabushiki Kaisha
Image coding and transmitting apparatus
US4780760A
(en)
*
1987-06-05
1988-10-25
General Electric Company
DPCM system with interframe motion indicator signal
US4897855A
(en)
*
1987-12-01
1990-01-30
General Electric Company
DPCM system with adaptive quantizer having unchanging bin number ensemble
US5136377A
(en)
*
1990-12-11
1992-08-04
At&T Bell Laboratories
Adaptive non-linear quantizer
SE9103380L
(en)
*
1991-11-15
1993-03-08
Televerket
PROCEDURE AND APPARATUS FOR IMAGE IMAGE WITH SKIPPING OF IMAGES AND / OR COMPONENTS
US5636294A
(en)
*
1994-08-09
1997-06-03
Unisys Corporation
Method and apparatus for truncation of images during data compression
US5822524A
(en)
*
1995-07-21
1998-10-13
Infovalue Computing, Inc.
System for just-in-time retrieval of multimedia files over computer networks by transmitting data packets at transmission rate determined by frame size
JP3133677B2
(en)
*
1996-06-27
2001-02-13
日本電気アイシーマイコンシステム株式会社
Decoding processing device and decoding processing method thereof
US6766376B2
(en)
2000-09-12
2004-07-20
Sn Acquisition, L.L.C
Streaming media buffering system
Family Cites Families (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3562744A
(en)
*
1968-12-24
1971-02-09
Texaco Inc
Amplifier system
1975
1975-10-15
CA
CA237,690A
patent/CA1042097A/en
not_active
Expired
1975-10-20
SE
SE7511735A
patent/SE411008B/en
not_active
IP Right Cessation
1975-10-20
US
US05/624,021
patent/US4051530A/en
not_active
Expired – Lifetime
1975-10-20
GB
GB42945/75A
patent/GB1525264A/en
not_active
Expired
1975-10-21
FR
FR7532101A
patent/FR2289070A1/en
active
Granted
1975-10-21
NL
NLAANVRAGE7512343,A
patent/NL170583C/en
not_active
IP Right Cessation
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2167267A
(en)
*
1984-11-08
1986-05-21
Nec Corp
Method and arrangement for refreshing a frame memory in an interframe encoding system
Also Published As
Publication number
Publication date
CA1042097A
(en)
1978-11-07
DE2547120A1
(en)
1976-05-06
NL7512343A
(en)
1976-04-23
US4051530A
(en)
1977-09-27
FR2289070B1
(en)
1980-05-09
SE411008B
(en)
1979-11-19
SE7511735L
(en)
1976-04-22
FR2289070A1
(en)
1976-05-21
NL170583C
(en)
1982-11-16
DE2547120B2
(en)
1976-11-11
NL170583B
(en)
1982-06-16
Similar Documents
Publication
Publication Date
Title
GB1525264A
(en)
1978-09-20
Frame-to-frame coding system
CA1232963A
(en)
1988-02-16
Television signal transmission
CA1243110A
(en)
1988-10-11
Method and arrangement for refreshing a frame memory in an interframe encoding system
US4077053A
(en)
1978-02-28
Television signal encoder utilizing a correlation between frames
US4723161A
(en)
1988-02-02
Method and arrangement of coding digital image signals utilizing interframe correlation
US4200886A
(en)
1980-04-29
Method for transmitting video signals with the aid of DPC modulation and controlled quantizer
EP0100216B1
(en)
1987-03-04
Improvements relating to video data transmission
JPH03204290A
(en)
1991-09-05
Video signal coding method
US5241401A
(en)
1993-08-31
Image signal encoding apparatus and method for controlling quantization step size in accordance with frame skip numbers
NO933181D0
(en)
1993-09-07
System for encoding and decoding digital signals, as well as apparatus thereby
US3767847A
(en)
1973-10-23
Frame-to-frame redundancy reduction system which transmits an intraframe coded signal
US5459515A
(en)
1995-10-17
Method for dual-standard coding of very low data-rate images and coder-decoder for implementing this method
US5822006A
(en)
1998-10-13
Video signal transmission method and apparatus employing variable quantization
US5392073A
(en)
1995-02-21
Motion estimating device for variable length encoded data
US3980830A
(en)
1976-09-14
Compatible picturephone system
JP6168672B1
(en)
2017-07-26
Encoding device provided with video switching device and encoding method including video switching detection method
KR100312083B1
(en)
2001-12-28
A device for transmitting television images, a device for receiving the images and a storage medium
US6067323A
(en)
2000-05-23
Decoding method and decoding apparatus of coded moving image signal
JPS5915438B2
(en)
1984-04-09
Interframe encoding processing method
US3920898A
(en)
1975-11-18
Non-synchronous duobinary encoding
JPS58150383A
(en)
1983-09-07
Inter-frame coding and decoding device for television
KR0147934B1
(en)
1998-09-15
Digital image recording/reproducing apparatus
JPH0738722B2
(en)
1995-04-26
Motion compensation coding method
JPS58139582A
(en)
1983-08-18
Inter-frame coding system
KR0185914B1
(en)
1999-05-01
Buffer occupancy control method in decoder
Legal Events
Date
Code
Title
Description
1979-01-10
PS
Patent sealed [section 19, patents act 1949]
1985-11-13
732
Registration of transactions, instruments or events in the register (sect. 32/1977)
1995-11-15
PE20
Patent expired after termination of 20 years
Effective date:
19951019
