WO1998014042A2 - Verfahren für eine höherwertige codierung und übertragung von information - Google Patents
Verfahren für eine höherwertige codierung und übertragung von information Download PDFInfo
- Publication number
- WO1998014042A2 WO1998014042A2 PCT/EP1997/007196 EP9707196W WO9814042A2 WO 1998014042 A2 WO1998014042 A2 WO 1998014042A2 EP 9707196 W EP9707196 W EP 9707196W WO 9814042 A2 WO9814042 A2 WO 9814042A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- periods
- frequency
- alternating current
- transmission
- coding
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/24—Half-wave signalling systems
Definitions
- the present invention is concerned with the digital transmission of information. To make better use of the transmission paths, higher-quality coding was provided. These codes were used for both wired and radio paths and for optical fibers. State of the art:
- the amplitude keying ASK amplitude shift keying
- the frequency keying FSK frequency shift keying
- the phase keying PSK phase shift keying
- the PSK which is least susceptible to interference or a combination of ASK and PSK in the form of QAM (quadrature amplitude modulation) is used.
- the 4PSK, 8PSK and 16QAM are mainly used.
- the stages are represented by pulse durations of different sizes, the pulse durations being represented by integer half-periods or periods of an alternating current of the same frequency and phase position.
- the half-periods or periods assigned to the stages can each receive a fixed numerical value or a difference number value or a negative and positive difference number value or reference number value.
- the following pulse is marked by a change in amplitude.
- the coding alternating current can also be provided directly as an alternating transmission current. Since each code word can have a different number of half-periods or periods, in the case of synchronous transmission, for example with the PAM taps, filler code words are required after the respective tap coding.
- filler elements can be added to supplement the Provide line or package. Memory is then required on the transmission and reception side. Since the total time is known, for example, for one line, you can also determine the number of remaining filling periods.
- the information density can be multiplied by using 2 or more coding alternating currents of the same or different frequency. If the frequency is the same, the principle of the QAM can be envisaged, so that by adding both coding alternating currents, the transmission can only take place with an alternating current of the same frequency. Be it the code elements of the first Stel ⁇ len for levels empowerso obtained the number of stages by Multipli ⁇ cation. The same can be done with alternating coding currents of different frequencies. make quenz. In such a case, since the code elements take up different times, the assignment to the different coding alternating currents will be regulated so that the redundancy remains as small as possible. The redundancy periods can only start at the end of the line or block.
- the invention relates to a higher-quality pulse duration coding.
- the durations of the stages are represented by a predetermined number of half-periods or periods of an alternating current of the same frequency, which are transmitted in an uninterrupted sequence.
- Fig.l 5 are assigned to levels D1, D2 and D3 2,3 and 4 periods.
- 3-digit code words CW1 and CW2 are recorded as examples.
- CW1 the pulse durations D3, D1, D2 and CW2 are assigned the pulse durations D1, D2 and Dl.
- the following continuous pulse, for example with code word CW1 is characterized by the change in amplitude D3 / A1 - Dl / A.
- FIG. 1 3-digit code words
- the coding alternating current can also be provided as an alternating transmission current.
- the steps can not only by a fixed half-cycle or period value but also by a differential figures ⁇ worth or negative and / or positive difference number value or reference value are displayed.
- An increase in the levels can be used, for example can be achieved by dividing the stages into two or more coding changes or by forming the stages by a serial arrangement of the code elements.
- the television receiver can be designed quite simply, as shown in FIG. 6, with an HF stage, a mixer stage 0SC + M, an amplifier, a demodulator DM and a decoder DC .
- the decoder then distributes the blanking and Synchronisiersig ⁇ dimensional, the Y, R and B signals, the sound signals T and other signals SO. 1
- the color difference signals RY.GY and BY are then generated in the matrix Ma.
- the code words are also different
- the tap values can also be transferred directly by providing a fill code element for each tap, designated DF in FIG. 4.
- DF fill code element for each tap
- the time between taps and therefore the number of periods are known. So you can subtract the number of periods of the tap code word from the number of periods of time between the taps and thus obtain the filler code element with the pulse duration DF.
- the code word is CWF and consists of the code elements D3, D1, D2 and DF. Without these filler code elements, the tap values would have to be saved.
- FIG. 3 shows a basic circuit for the transmission of information with this code.
- the coding alternating current is generated in the oscillator and supplied to the modulator MO.
- the information is converted into the code in the encoder and the alternating current in the modulator is influenced accordingly.
- demodulation takes place in the demodulator and fed to the decoder (DCod).
- the conversion into the original signal S takes place in this.
- FIG. A is the large and AI the small amplitude.
- a transition amplitude AÜ is also switched for the transition from A to AI and vice versa.
- the levels can be designed as required, e.g. with 3,5,7,9 periods or with 10,11,12 periods.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Dc Digital Transmission (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU57621/98A AU5762198A (en) | 1997-02-19 | 1997-12-22 | Method of high-order codification and transmission of information |
DE19781032T DE19781032D2 (de) | 1997-02-19 | 1997-12-22 | Verfahren für eine höherwertige Codierung und Übertragung von Informationen |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19706411.6 | 1997-02-19 | ||
DE19706411 | 1997-02-19 | ||
DE19717578.3 | 1997-04-25 | ||
DE19717578 | 1997-04-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1998014042A2 true WO1998014042A2 (de) | 1998-04-09 |
WO1998014042A3 WO1998014042A3 (de) | 1998-07-30 |
Family
ID=26034080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/007196 WO1998014042A2 (de) | 1997-02-19 | 1997-12-22 | Verfahren für eine höherwertige codierung und übertragung von information |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU5762198A (de) |
DE (1) | DE19781032D2 (de) |
WO (1) | WO1998014042A2 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999012318A2 (de) * | 1998-06-26 | 1999-03-11 | Josef Dirr | Verfahren zur verdopplung von codierungsstufen |
GB2355167A (en) * | 1999-06-14 | 2001-04-11 | Electric Submersible Pumps Inc | Method and system of communicating in a subterranean well |
WO2001043385A1 (de) * | 1999-12-07 | 2001-06-14 | Josef Dirr | Digitales übertragungsverfahren für bandbreiten- und bitratenflexibilität |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3439676A1 (de) * | 1984-10-30 | 1986-05-07 | Josef Dipl.-Ing. Dirr (FH), 8000 München | Verfahren zur codierung digitaler signale bzw. alphabete mit ein-zwei-(z.b. telegrafenbinaercode) oder mehrstufigen codeelementen und deren uebertragung |
EP0197529A2 (de) * | 1985-04-23 | 1986-10-15 | Josef Dirr | Verfahren für die analoge oder digitale Codierung von Information für die Verwendung bei Winkel- und Pulsmodulationsverfahren |
DE3630117A1 (de) * | 1985-06-25 | 1988-04-14 | Dirr Josef | Verfahren fuer die codierung und uebertragung analoger information |
US5050188A (en) * | 1987-06-12 | 1991-09-17 | Josef Dirr | Method and apparatus for transmitting coded information |
DE19707290A1 (de) * | 1996-02-26 | 1997-09-04 | Dirr Josef | Verfahren für eine Stufencodierung von Information |
-
1997
- 1997-12-22 AU AU57621/98A patent/AU5762198A/en not_active Abandoned
- 1997-12-22 DE DE19781032T patent/DE19781032D2/de not_active Expired - Fee Related
- 1997-12-22 WO PCT/EP1997/007196 patent/WO1998014042A2/de active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3439676A1 (de) * | 1984-10-30 | 1986-05-07 | Josef Dipl.-Ing. Dirr (FH), 8000 München | Verfahren zur codierung digitaler signale bzw. alphabete mit ein-zwei-(z.b. telegrafenbinaercode) oder mehrstufigen codeelementen und deren uebertragung |
EP0197529A2 (de) * | 1985-04-23 | 1986-10-15 | Josef Dirr | Verfahren für die analoge oder digitale Codierung von Information für die Verwendung bei Winkel- und Pulsmodulationsverfahren |
DE3630117A1 (de) * | 1985-06-25 | 1988-04-14 | Dirr Josef | Verfahren fuer die codierung und uebertragung analoger information |
US5050188A (en) * | 1987-06-12 | 1991-09-17 | Josef Dirr | Method and apparatus for transmitting coded information |
DE19707290A1 (de) * | 1996-02-26 | 1997-09-04 | Dirr Josef | Verfahren für eine Stufencodierung von Information |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999012318A2 (de) * | 1998-06-26 | 1999-03-11 | Josef Dirr | Verfahren zur verdopplung von codierungsstufen |
WO1999012318A3 (de) * | 1998-06-26 | 1999-05-14 | Josef Dirr | Verfahren zur verdopplung von codierungsstufen |
US6463104B1 (en) | 1998-06-26 | 2002-10-08 | Josef Dirr | Method of increasing coding levels |
GB2355167A (en) * | 1999-06-14 | 2001-04-11 | Electric Submersible Pumps Inc | Method and system of communicating in a subterranean well |
US6396415B1 (en) | 1999-06-14 | 2002-05-28 | Wood Group Esp, Inc. | Method and system of communicating in a subterranean well |
WO2001043385A1 (de) * | 1999-12-07 | 2001-06-14 | Josef Dirr | Digitales übertragungsverfahren für bandbreiten- und bitratenflexibilität |
US7027525B2 (en) | 1999-12-07 | 2006-04-11 | Josef Dirr | Digital transmission method for bandwidth and bit rate flexibility |
Also Published As
Publication number | Publication date |
---|---|
WO1998014042A3 (de) | 1998-07-30 |
AU5762198A (en) | 1998-04-24 |
DE19781032D2 (de) | 1998-12-24 |
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