ES474225A1 - Una disposicion de circuito para la reduccion del ruido en la modulacion delta con compansion - Google Patents
Una disposicion de circuito para la reduccion del ruido en la modulacion delta con compansionInfo
- Publication number
- ES474225A1 ES474225A1 ES474225A ES474225A ES474225A1 ES 474225 A1 ES474225 A1 ES 474225A1 ES 474225 A ES474225 A ES 474225A ES 474225 A ES474225 A ES 474225A ES 474225 A1 ES474225 A1 ES 474225A1
- Authority
- ES
- Spain
- Prior art keywords
- delta
- step size
- noise reduction
- delta modulators
- reduction method
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M3/00—Conversion of analogue values to or from differential modulation
- H03M3/02—Delta modulation, i.e. one-bit differential modulation
- H03M3/022—Delta modulation, i.e. one-bit differential modulation with adaptable step size, e.g. adaptive delta modulation [ADM]
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
Una disposición de circuito para la reducción del ruido en la modulación delta con compansión, con selección de la magnitud de paso o escalón en cada caso, en instalaciones para la transmisión de información, caracterizada porque, en la selección de la magnitud mínima de paso de modulación delta, este estado es señalado por el hecho de que, en cada caso, el bitio de salida modulado en delta a transmitir es comparado con el bitio de señal modulado en delta emitido precedentemente, y porque en caso de no coincidencia de los bitios de señal comparados y señalización simultánea de la selección de la magnitud de paso mínima de modulación delta, se emplea en la modulación una magnitud de paso mayor que la mínima propiamente prevista.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/842,710 US4110705A (en) | 1977-10-17 | 1977-10-17 | Noise reduction method and apparatus for companded delta modulators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES474225A1 true ES474225A1 (es) | 1979-04-01 |
Family
ID=25288062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES474225A Expired ES474225A1 (es) | 1977-10-17 | 1978-10-16 | Una disposicion de circuito para la reduccion del ruido en la modulacion delta con compansion |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4110705A (es) |
| JP (1) | JPS5919491B2 (es) |
| AT (1) | AT376336B (es) |
| AU (1) | AU517906B2 (es) |
| CA (1) | CA1121057A (es) |
| CH (1) | CH643973A5 (es) |
| DE (1) | DE2836049C2 (es) |
| ES (1) | ES474225A1 (es) |
| FR (1) | FR2406346A1 (es) |
| GB (1) | GB1576980A (es) |
| IT (1) | IT1159131B (es) |
| SU (1) | SU1082343A3 (es) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2849001C2 (de) * | 1978-11-11 | 1982-10-07 | TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg | Netzwerk für adaptive Deltamodulation |
| US4264974A (en) * | 1979-12-17 | 1981-04-28 | International Business Machines Corporation | Optimized digital delta modulation compander having truncation effect error recovery |
| US4700362A (en) * | 1983-10-07 | 1987-10-13 | Dolby Laboratories Licensing Corporation | A-D encoder and D-A decoder system |
| NO160750C (no) * | 1985-06-27 | 1989-05-24 | Norway Geophysical Co | Anordning for digital signalbehandling paa kontinuerlige bitstroemmer. |
| US5592508A (en) * | 1994-09-22 | 1997-01-07 | Cooper; J. Carl | Analog signal coding and transmission apparatus and method capable of operation with multiple types of analog and digital signals |
| US9503121B2 (en) * | 2014-10-17 | 2016-11-22 | Infineon Technologies Ag | Very high dynamic-range switched capacitor ADC with large input impedance for applications tolerating increased distortion and noise at large input signal levels |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3716803A (en) * | 1971-12-27 | 1973-02-13 | Bell Telephone Labor Inc | Stabilized delta modulator |
| US3806806A (en) * | 1972-11-20 | 1974-04-23 | Bell Telephone Labor Inc | Adaptive data modulator |
| JPS547525B2 (es) * | 1973-12-28 | 1979-04-07 | ||
| US4025852A (en) * | 1975-10-14 | 1977-05-24 | Bell Telephone Laboratories, Incorporated | Method and arrangement for controlling delta modulator idle-channel noise |
-
1977
- 1977-10-17 US US05/842,710 patent/US4110705A/en not_active Expired - Lifetime
-
1978
- 1978-05-12 GB GB19327/78A patent/GB1576980A/en not_active Expired
- 1978-07-07 CA CA000306954A patent/CA1121057A/en not_active Expired
- 1978-08-17 DE DE2836049A patent/DE2836049C2/de not_active Expired
- 1978-08-21 AU AU39123/78A patent/AU517906B2/en not_active Expired
- 1978-08-22 AT AT0611778A patent/AT376336B/de not_active IP Right Cessation
- 1978-09-08 JP JP53109883A patent/JPS5919491B2/ja not_active Expired
- 1978-09-13 CH CH958778A patent/CH643973A5/de not_active IP Right Cessation
- 1978-09-15 FR FR7827025A patent/FR2406346A1/fr active Granted
- 1978-09-27 IT IT28126/78A patent/IT1159131B/it active
- 1978-10-16 SU SU782677104A patent/SU1082343A3/ru active
- 1978-10-16 ES ES474225A patent/ES474225A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5919491B2 (ja) | 1984-05-07 |
| AU517906B2 (en) | 1981-09-03 |
| DE2836049A1 (de) | 1979-04-26 |
| JPS5462765A (en) | 1979-05-21 |
| SU1082343A3 (ru) | 1984-03-23 |
| GB1576980A (en) | 1980-10-15 |
| CH643973A5 (de) | 1984-06-29 |
| ATA611778A (de) | 1984-03-15 |
| IT7828126A0 (it) | 1978-09-27 |
| DE2836049C2 (de) | 1985-01-31 |
| AT376336B (de) | 1984-11-12 |
| IT1159131B (it) | 1987-02-25 |
| FR2406346A1 (fr) | 1979-05-11 |
| CA1121057A (en) | 1982-03-30 |
| AU3912378A (en) | 1980-02-28 |
| US4110705A (en) | 1978-08-29 |
| FR2406346B1 (es) | 1983-03-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 19971201 |