JPS54140804A - Sound transmission system - Google Patents
Sound transmission systemInfo
- Publication number
- JPS54140804A JPS54140804A JP4834678A JP4834678A JPS54140804A JP S54140804 A JPS54140804 A JP S54140804A JP 4834678 A JP4834678 A JP 4834678A JP 4834678 A JP4834678 A JP 4834678A JP S54140804 A JPS54140804 A JP S54140804A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- band component
- frequency
- sound
- seconds
- 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.)
- Pending
Links
Landscapes
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
PURPOSE: To discriminate a sound with high precision without cutting off a high- band component by decreasing the frequency of the high-band component of an input sound signal divided into the high-band component and low-band component and then by transmitting the signal with both the components shifted in terms of time.
CONSTITUTION: At the transmitting side, an input sound signal is passed through low-pass filter 2 of less than 3.4KHz and band-pass filter 3 of 3.4 to 6.5KHz. The frequency of the sound signal from filter 3 is decreased by 3.1KHz by frequency converter 4, the signal of which is delayed by (t) seconds (approximate 300m seconds) by delay circuit 5. Then, the outputs of filters 2 and 3 are both mixed 6 to obtain output signal 7. At the receiving side, on the other hand, the input signal is processed through the reverse operation (delay and frequency addition) of the transmission so as to obtain a sound output.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4834678A JPS54140804A (en) | 1978-04-25 | 1978-04-25 | Sound transmission system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4834678A JPS54140804A (en) | 1978-04-25 | 1978-04-25 | Sound transmission system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54140804A true JPS54140804A (en) | 1979-11-01 |
Family
ID=12800815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4834678A Pending JPS54140804A (en) | 1978-04-25 | 1978-04-25 | Sound transmission system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54140804A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63217732A (en) * | 1987-03-05 | 1988-09-09 | Kokusai Electric Co Ltd | Coding transmission system for voice signal |
-
1978
- 1978-04-25 JP JP4834678A patent/JPS54140804A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63217732A (en) * | 1987-03-05 | 1988-09-09 | Kokusai Electric Co Ltd | Coding transmission system for voice signal |
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