GB801469A - Improvements in devices for improving the intelligibility of electrically transmitted sound signals - Google Patents
Improvements in devices for improving the intelligibility of electrically transmitted sound signalsInfo
- Publication number
- GB801469A GB801469A GB10274/56A GB1027456A GB801469A GB 801469 A GB801469 A GB 801469A GB 10274/56 A GB10274/56 A GB 10274/56A GB 1027456 A GB1027456 A GB 1027456A GB 801469 A GB801469 A GB 801469A
- Authority
- GB
- United Kingdom
- Prior art keywords
- intelligibility
- modulate
- april
- delayed
- phone
- 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
- H04S—STEREOPHONIC SYSTEMS
- H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
Abstract
801,469. Telephone transmission systems. ANGOT, A., DAGUET, J., and MARCOU, P. April 4, 1956 [April 8, 1955], No. 10274/56. Drawings to Specification. Class 40 (4). To improve intelligibility in a telephony system, pseudo stereophonic sound is produced in a telephone handset by causing a phase delay of e.g. one-third of a millisecond between the two headphones. Three arrangements are described : (i) a delay line is placed in the lead to one phone, and an impedance in the lead to the other phone to balance the sound level. This improves intelligibility in the presence of surrounding noise, Fig. 1 (not shown); (ii) the radio-telephony receiver gives two demodulated outputs corresponding to the two received sidebands, which each contain the same useful signal but different noise signals-one output is delayed, Fig. 2 (not shown); (iii) the output from the transmitter microphone is split, and one channel is delayed. These two microphone signals may be used (a) to modulate a single transmitter with two sidebands which are separated at the receiver, or (b) to modulate two different transmitters. Specification 399,554, [Class 40 (4)], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR801469X | 1955-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB801469A true GB801469A (en) | 1958-09-17 |
Family
ID=9243747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10274/56A Expired GB801469A (en) | 1955-04-08 | 1956-04-04 | Improvements in devices for improving the intelligibility of electrically transmitted sound signals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB801469A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1113245B (en) * | 1958-10-11 | 1961-08-31 | Westdeutscher Rundfunk | Method for stereophonic electro-acoustic transmission |
| GB2306087A (en) * | 1995-10-09 | 1997-04-23 | Oliver Stephen Tillett | Processing audio signals |
-
1956
- 1956-04-04 GB GB10274/56A patent/GB801469A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1113245B (en) * | 1958-10-11 | 1961-08-31 | Westdeutscher Rundfunk | Method for stereophonic electro-acoustic transmission |
| GB2306087A (en) * | 1995-10-09 | 1997-04-23 | Oliver Stephen Tillett | Processing audio signals |
| GB2306087B (en) * | 1995-10-09 | 1999-09-22 | Oliver Stephen Tillett | Circuit arrangement for use with radio signals |
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