JPS55161438A - Sound signal memory unit - Google Patents
Sound signal memory unitInfo
- Publication number
- JPS55161438A JPS55161438A JP6975379A JP6975379A JPS55161438A JP S55161438 A JPS55161438 A JP S55161438A JP 6975379 A JP6975379 A JP 6975379A JP 6975379 A JP6975379 A JP 6975379A JP S55161438 A JPS55161438 A JP S55161438A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- sound signal
- memory unit
- signal memory
- circuit
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M3/00—Conversion of analogue values to or from differential modulation
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
PURPOSE:To reduce the memory capacity of a memory, by comparing the amplitude value of a sound signal with the amplitude value preceding by one sample period and by storing the difference between them. CONSTITUTION:Sound signal (a) is sampled or held in sample hold circuit 1 by clock signal (b). Then, the output of circuit 1 becomes signal (c). Signal (c) is subtracted from signal (a) by subtracting circuit 21 to obtain signal (d). Signal (d) is sampled or held in sample hold circuit 22 by clock signal (e) inverted by inverter 23 and becomes signal (f). Signal (f) is converted to a digital quantity by A/D converter 2 and is stored temporarily in digital memory 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6975379A JPS55161438A (en) | 1979-06-04 | 1979-06-04 | Sound signal memory unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6975379A JPS55161438A (en) | 1979-06-04 | 1979-06-04 | Sound signal memory unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55161438A true JPS55161438A (en) | 1980-12-16 |
Family
ID=13411858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6975379A Pending JPS55161438A (en) | 1979-06-04 | 1979-06-04 | Sound signal memory unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55161438A (en) |
-
1979
- 1979-06-04 JP JP6975379A patent/JPS55161438A/en active Pending
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