AU6301586A - Coder for multi-dimensional difference pcm - Google Patents
Coder for multi-dimensional difference pcmInfo
- Publication number
- AU6301586A AU6301586A AU63015/86A AU6301586A AU6301586A AU 6301586 A AU6301586 A AU 6301586A AU 63015/86 A AU63015/86 A AU 63015/86A AU 6301586 A AU6301586 A AU 6301586A AU 6301586 A AU6301586 A AU 6301586A
- Authority
- AU
- Australia
- Prior art keywords
- output
- adder
- input
- subtracting unit
- fed back
- 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.)
- Granted
Links
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
- H04N19/50—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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/3002—Conversion to or from differential modulation
- H03M7/3044—Conversion to or from differential modulation with several bits only, i.e. the difference between successive samples being coded by more than one bit, e.g. differential pulse code modulation [DPCM]
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
1. Multi-dimensional DPCM coder with a high processing speed, characterised by : a) A quantisation device (QE) which is preceded by a series circuit of a first, second and third subtracting unit (SU1, SU2, SU3), the first subtracting unit (SU1) being supplied with digitised samples (si) from the input (1) of the coder, b) A first computing loop which is fed back from the output (3) of the quantisation device (QE), at which quantised DPCM values (DELTA si, q) are output, via a first multiplier (M1) which multiplies by a constant prediction factor (a), to the subtraction input (-) of the third subtracting unit (SU3) which directly precedes the quantisation device (QE), c) An inner computing loop which exhibits a first adder (AD1), which is connected to the output (3) of the quantisation device and the output of which is fed back via the series circuit of a second register (R2) and a second multiplier (M2) and via a second adder (AD2) to the second input of the first adder (AD1), d) A second computing loop which is fed back from the output (3) of the quantisation device (QE) via the first adder (AD1), the second register (R2) and via two multipliers (M2, M3), which in each case multiply by the prediction factor (a), to the subtraction input (-) of the second substracting unit (SU2) preceding the third subtracting unit (SU3), and e) A third computing loop which is fed back via the first adder (AD1) and a line predictor (PRL) which delivers at its output (6) an additional estimated value (szi) to the subtraction input (-) of the first subtracting unit (SU1), the output (6) of the line predictor (PRL) also being connected via a register (Rz+1 ) to the second input of the second adder (AD2) in the inner computing loop.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3533868 | 1985-09-23 | ||
DE3533868 | 1985-09-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
AU6301586A true AU6301586A (en) | 1987-06-11 |
AU567015B2 AU567015B2 (en) | 1987-11-05 |
Family
ID=6281689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU63015/86A Ceased AU567015B2 (en) | 1985-09-23 | 1986-09-22 | Coder for multi-dimensional difference pcm |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0218918B1 (en) |
JP (1) | JPS6272230A (en) |
AT (1) | ATE48354T1 (en) |
AU (1) | AU567015B2 (en) |
DE (1) | DE3667232D1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1775097A1 (en) * | 2005-10-17 | 2007-04-18 | REMAK Maschinenbau GmbH | Device for the temperature control of moulds, such as of injection moulding machines |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1085044A (en) * | 1975-04-03 | 1980-09-02 | Yukihiko Iijima | Composite feedback predictive code communication system for a color tv signal including a carrier chrominance signal |
WO1980000207A1 (en) * | 1978-06-27 | 1980-02-07 | Indep Broadcasting Authority | Predictive differential pulse-code modulation apparatus |
DE3232516A1 (en) * | 1982-09-01 | 1984-03-01 | Siemens AG, 1000 Berlin und 8000 München | FAST DPCM ENCODER |
DE3333404A1 (en) * | 1983-09-15 | 1985-04-04 | Siemens AG, 1000 Berlin und 8000 München | METHOD AND CIRCUIT ARRANGEMENT FOR IMPROVING THE IMAGE QUALITY BY ACTIVITY CONTROLLED DPCM CODING |
DE3586932T2 (en) * | 1984-08-30 | 1993-05-13 | Fujitsu Ltd | DIFFERENTIAL CODING CIRCUIT. |
US4658239A (en) * | 1984-09-14 | 1987-04-14 | Siemens Aktiengesellschaft | Differential pulse code modulation coder |
-
1986
- 1986-09-10 EP EP86112520A patent/EP0218918B1/en not_active Expired
- 1986-09-10 AT AT86112520T patent/ATE48354T1/en not_active IP Right Cessation
- 1986-09-10 DE DE8686112520T patent/DE3667232D1/en not_active Expired - Fee Related
- 1986-09-22 AU AU63015/86A patent/AU567015B2/en not_active Ceased
- 1986-09-24 JP JP61223957A patent/JPS6272230A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
EP0218918A1 (en) | 1987-04-22 |
DE3667232D1 (en) | 1990-01-04 |
EP0218918B1 (en) | 1989-11-29 |
JPS6272230A (en) | 1987-04-02 |
ATE48354T1 (en) | 1989-12-15 |
AU567015B2 (en) | 1987-11-05 |
JPH0156579B2 (en) | 1989-11-30 |
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