GB2190813B - Improvements in predictors for video signals - Google Patents

Improvements in predictors for video signals

Info

Publication number
GB2190813B
GB2190813B GB8710813A GB8710813A GB2190813B GB 2190813 B GB2190813 B GB 2190813B GB 8710813 A GB8710813 A GB 8710813A GB 8710813 A GB8710813 A GB 8710813A GB 2190813 B GB2190813 B GB 2190813B
Authority
GB
United Kingdom
Prior art keywords
signal
prediction signal
input signal
prediction
predictors
Prior art date
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 - Lifetime
Application number
GB8710813A
Other versions
GB8710813D0 (en
GB2190813A (en
Inventor
Nicholas Dominic Wells
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.)
British Broadcasting Corp
Original Assignee
British Broadcasting 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.)
Filing date
Publication date
Application filed by British Broadcasting Corp filed Critical British Broadcasting Corp
Publication of GB8710813D0 publication Critical patent/GB8710813D0/en
Publication of GB2190813A publication Critical patent/GB2190813A/en
Application granted granted Critical
Publication of GB2190813B publication Critical patent/GB2190813B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/007—Transform coding, e.g. discrete cosine transform
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/04—Colour television systems using pulse code modulation
    • H04N11/042—Codec means
    • H04N11/046—DPCM
    • 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
    • H04N19/593—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial prediction techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Discrete Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

A prediction signal is substracted 14 from a video input signal to form a differential signal for transmission via a coder 46. The differential signal quantized 16 is added 20 to the prediction signal to form a predictor input signal from which the prediction signal is formed by means of pixel and line delays 24, 32, 36, 34; multipliers 26, 42, 44 which multiply by weighing coefficients C1, C2 etc. and adders 40, 38, 28 which sum the partial products. The various delays enable the prediction signal to be formed, with enhanced accuracy, from a cluster of samples (at least six and preferably more) taken from a plurality of adjacent lines and, optionally, from more than one consecutive field or picture. Limiters 22 and 30 ensure that neither the predictor input signal nor the prediction signal can go out of range. Advantageous sets of weighing coefficients are disclosed. <IMAGE>
GB8710813A 1986-05-19 1987-05-07 Improvements in predictors for video signals Expired - Lifetime GB2190813B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8612133A GB8612133D0 (en) 1986-05-19 1986-05-19 Predictors for video signals

Publications (3)

Publication Number Publication Date
GB8710813D0 GB8710813D0 (en) 1987-06-10
GB2190813A GB2190813A (en) 1987-11-25
GB2190813B true GB2190813B (en) 1990-01-31

Family

ID=10598074

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8612133A Pending GB8612133D0 (en) 1986-05-19 1986-05-19 Predictors for video signals
GB8710813A Expired - Lifetime GB2190813B (en) 1986-05-19 1987-05-07 Improvements in predictors for video signals

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8612133A Pending GB8612133D0 (en) 1986-05-19 1986-05-19 Predictors for video signals

Country Status (1)

Country Link
GB (2) GB8612133D0 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2368248A (en) * 2000-10-20 2002-04-24 Sony Uk Ltd Image compression using iterative intraframe predictive coding

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980000207A1 (en) * 1978-06-27 1980-02-07 Indep Broadcasting Authority Predictive differential pulse-code modulation apparatus
WO1981000181A1 (en) * 1979-07-06 1981-01-22 Indep Broadcasting Authority Method and apparatus for data-rate reduction
EP0141969A1 (en) * 1983-09-15 1985-05-22 Siemens Aktiengesellschaft Method and circuit arrangement for improving picture quality by movement-controlled DPCM coding

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980000207A1 (en) * 1978-06-27 1980-02-07 Indep Broadcasting Authority Predictive differential pulse-code modulation apparatus
WO1981000181A1 (en) * 1979-07-06 1981-01-22 Indep Broadcasting Authority Method and apparatus for data-rate reduction
EP0141969A1 (en) * 1983-09-15 1985-05-22 Siemens Aktiengesellschaft Method and circuit arrangement for improving picture quality by movement-controlled DPCM coding

Also Published As

Publication number Publication date
GB8612133D0 (en) 1986-06-25
GB8710813D0 (en) 1987-06-10
GB2190813A (en) 1987-11-25

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20070506