GB1287171A - Improvements in digital transmission of telephony signals - Google Patents
Improvements in digital transmission of telephony signalsInfo
- Publication number
- GB1287171A GB1287171A GB4164570A GB4164570A GB1287171A GB 1287171 A GB1287171 A GB 1287171A GB 4164570 A GB4164570 A GB 4164570A GB 4164570 A GB4164570 A GB 4164570A GB 1287171 A GB1287171 A GB 1287171A
- Authority
- GB
- United Kingdom
- Prior art keywords
- counter
- attenuation
- maximum
- cause
- quantizer
- 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
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR6929592A FR2056081A5 (fr) | 1969-08-29 | 1969-08-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1287171A true GB1287171A (en) | 1972-08-31 |
Family
ID=9039537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4164570A Expired GB1287171A (en) | 1969-08-29 | 1970-08-28 | Improvements in digital transmission of telephony signals |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE754708A (fr) |
CH (1) | CH526887A (fr) |
DE (1) | DE2042470A1 (fr) |
FR (1) | FR2056081A5 (fr) |
GB (1) | GB1287171A (fr) |
NL (1) | NL7012511A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2160394A (en) * | 1984-05-02 | 1985-12-18 | Pioneer Electronic Corp | Noise reduction system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL190093C (nl) * | 1979-12-17 | 1993-10-18 | Victor Company Of Japan | Comprimeer- en expandeerstelsel. |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL147080B (nl) * | 1948-06-19 | Mead Corp | Werkwijze ter vervaardiging van een registratiemateriaal, geschikt voor het ontwikkelen van gekleurde beelden met een kleurreagens, en aldus vervaardigd registratiemateriaal. | |
US3026375A (en) * | 1958-05-09 | 1962-03-20 | Bell Telephone Labor Inc | Transmission of quantized signals |
US3187323A (en) * | 1961-10-24 | 1965-06-01 | North American Aviation Inc | Automatic scaler for analog-to-digital converter |
FR89055E (fr) * | 1963-01-25 | 1967-05-05 | Int Standard Electric Corp | Transmission des valeurs numériques en code digital |
-
0
- BE BE754708D patent/BE754708A/fr unknown
-
1969
- 1969-08-29 FR FR6929592A patent/FR2056081A5/fr not_active Expired
-
1970
- 1970-08-14 CH CH1225370A patent/CH526887A/fr not_active IP Right Cessation
- 1970-08-24 NL NL7012511A patent/NL7012511A/xx unknown
- 1970-08-27 DE DE19702042470 patent/DE2042470A1/de active Pending
- 1970-08-28 GB GB4164570A patent/GB1287171A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2160394A (en) * | 1984-05-02 | 1985-12-18 | Pioneer Electronic Corp | Noise reduction system |
Also Published As
Publication number | Publication date |
---|---|
FR2056081A5 (fr) | 1971-05-14 |
BE754708A (fr) | 1971-01-18 |
CH526887A (fr) | 1972-08-15 |
NL7012511A (fr) | 1971-03-02 |
DE2042470A1 (de) | 1971-03-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |