FR2443768A1 - Convertisseur analogique numerique - Google Patents
Convertisseur analogique numeriqueInfo
- Publication number
- FR2443768A1 FR2443768A1 FR7929870A FR7929870A FR2443768A1 FR 2443768 A1 FR2443768 A1 FR 2443768A1 FR 7929870 A FR7929870 A FR 7929870A FR 7929870 A FR7929870 A FR 7929870A FR 2443768 A1 FR2443768 A1 FR 2443768A1
- Authority
- FR
- France
- Prior art keywords
- zero point
- point displacement
- circuit
- digital
- analog converter
- 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
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
- H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
- H04B14/046—Systems or methods for reducing noise or bandwidth
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
- H04B14/046—Systems or methods for reducing noise or bandwidth
- H04B14/048—Non linear compression or expansion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
Abstract
Un codeur p.c.m. comprend un convertisseur analogique numérique linéaire à haute précision 1 suivi par un filtre passe-haut numérique 2, un circuit d'écart de réglage permanent en courant continu 5 et un compresseur numérique 6. Le filtre passe-haut supprime du signal codé tout écart de réglage permanent en courant continu et le circuit d'écart de réglage permanent en courant continu réintroduit une quantité contrôlée de cet écart. Par ces moyens, la performance peut être améliorée spécialement en ce qui concerne le bruit de fond et l'augmentation de la diaphonie.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7847162A GB2064276B (en) | 1978-12-05 | 1978-12-05 | Analogue to digital converters |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2443768A1 true FR2443768A1 (fr) | 1980-07-04 |
FR2443768B1 FR2443768B1 (fr) | 1985-02-22 |
Family
ID=10501512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7929870A Granted FR2443768A1 (fr) | 1978-12-05 | 1979-12-05 | Convertisseur analogique numerique |
Country Status (12)
Country | Link |
---|---|
JP (1) | JPS6031411B2 (fr) |
AR (1) | AR222845A1 (fr) |
AU (1) | AU523624B2 (fr) |
BR (1) | BR7907820A (fr) |
CH (1) | CH642206A5 (fr) |
DE (1) | DE2948438A1 (fr) |
ES (1) | ES486610A1 (fr) |
FR (1) | FR2443768A1 (fr) |
GB (1) | GB2064276B (fr) |
MX (1) | MX147431A (fr) |
NL (1) | NL7908741A (fr) |
NZ (1) | NZ192278A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0266751A2 (fr) * | 1986-11-07 | 1988-05-11 | ANT Nachrichtentechnik GmbH | Procédé et système de traitement de signal numérique |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02209017A (ja) * | 1989-02-09 | 1990-08-20 | Matsushita Electric Ind Co Ltd | A/d変換装置 |
JPH0479523A (ja) * | 1990-07-20 | 1992-03-12 | Fujitsu Ltd | Pcmチャネルユニットのオフセット補償方式 |
WO2000007178A1 (fr) * | 1998-07-31 | 2000-02-10 | Conexant Systems, Inc. | Procede et appareil utiles pour eliminer le bruit au moyen de la transformation de la sortie du decodeur de parole |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3904963A (en) * | 1969-08-06 | 1975-09-09 | Trt Telecom Radio Electr | System for the transmission of analog signals by means of pulse code modulation using non-recursive filters |
FR2373193A1 (fr) * | 1976-12-01 | 1978-06-30 | Post Office | Procede pour convertir un signal a modulation par impulsions codees en signal analogique et dispositif pour la mise en oeuvre dudit procede |
-
1978
- 1978-12-05 GB GB7847162A patent/GB2064276B/en not_active Expired
-
1979
- 1979-11-28 MX MX180226A patent/MX147431A/es unknown
- 1979-11-28 AU AU53246/79A patent/AU523624B2/en not_active Ceased
- 1979-11-29 AR AR279085A patent/AR222845A1/es active
- 1979-11-29 NZ NZ192278A patent/NZ192278A/xx unknown
- 1979-11-30 BR BR7907820A patent/BR7907820A/pt unknown
- 1979-12-01 DE DE19792948438 patent/DE2948438A1/de not_active Withdrawn
- 1979-12-04 NL NL7908741A patent/NL7908741A/nl not_active Application Discontinuation
- 1979-12-05 CH CH1077579A patent/CH642206A5/de not_active IP Right Cessation
- 1979-12-05 JP JP54156940A patent/JPS6031411B2/ja not_active Expired
- 1979-12-05 ES ES486610A patent/ES486610A1/es not_active Expired
- 1979-12-05 FR FR7929870A patent/FR2443768A1/fr active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3904963A (en) * | 1969-08-06 | 1975-09-09 | Trt Telecom Radio Electr | System for the transmission of analog signals by means of pulse code modulation using non-recursive filters |
FR2373193A1 (fr) * | 1976-12-01 | 1978-06-30 | Post Office | Procede pour convertir un signal a modulation par impulsions codees en signal analogique et dispositif pour la mise en oeuvre dudit procede |
Non-Patent Citations (1)
Title |
---|
EXBK/75 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0266751A2 (fr) * | 1986-11-07 | 1988-05-11 | ANT Nachrichtentechnik GmbH | Procédé et système de traitement de signal numérique |
EP0266751A3 (en) * | 1986-11-07 | 1989-11-15 | Ant Nachrichtentechnik Gmbh | Digital signal-processing method and system |
Also Published As
Publication number | Publication date |
---|---|
CH642206A5 (en) | 1984-03-30 |
FR2443768B1 (fr) | 1985-02-22 |
ES486610A1 (es) | 1980-06-16 |
BR7907820A (pt) | 1980-07-29 |
GB2064276B (en) | 1982-09-08 |
JPS5580940A (en) | 1980-06-18 |
DE2948438A1 (de) | 1980-06-19 |
AR222845A1 (es) | 1981-06-30 |
AU5324679A (en) | 1980-06-12 |
MX147431A (es) | 1982-12-02 |
NL7908741A (nl) | 1980-06-09 |
GB2064276A (en) | 1981-06-10 |
NZ192278A (en) | 1982-05-25 |
AU523624B2 (en) | 1982-08-05 |
JPS6031411B2 (ja) | 1985-07-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |