JPS55134478A - Waveform memory unit - Google Patents
Waveform memory unitInfo
- Publication number
- JPS55134478A JPS55134478A JP4215479A JP4215479A JPS55134478A JP S55134478 A JPS55134478 A JP S55134478A JP 4215479 A JP4215479 A JP 4215479A JP 4215479 A JP4215479 A JP 4215479A JP S55134478 A JPS55134478 A JP S55134478A
- Authority
- JP
- Japan
- Prior art keywords
- register
- change components
- converter
- memory
- cpu2
- 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
- Electrophonic Musical Instruments (AREA)
Abstract
PURPOSE: To reduce the number of bits per one word of a memory and improve response, by storing change components of an input signal so that their range may be changed in respect to exponential function.
CONSTITUTION: An inputted signal is subjected to A/D conversion by A/D converter 1 to become a digital value and is given to CPU2. In CPU2, A register 21 stores temporarily total sum V'n of coded change components, and B register 22 stores temporarily input voltage Vn converted to the digital value by converter 1. C register 23 stores the difference between the output of converter 1 and total sum V'n of coded change components, and D register 24 designates addresses of ROM31 and ROM32, and the address of waveform storage memory 41 is designated by E register 25. Thus, change components of the input signal are so stored that their range may be changed in respect to exponential function, so that the number of bits per one word of the memory can be reduced to improve response.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4215479A JPS55134478A (en) | 1979-04-06 | 1979-04-06 | Waveform memory unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4215479A JPS55134478A (en) | 1979-04-06 | 1979-04-06 | Waveform memory unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55134478A true JPS55134478A (en) | 1980-10-20 |
Family
ID=12628015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4215479A Pending JPS55134478A (en) | 1979-04-06 | 1979-04-06 | Waveform memory unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55134478A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57141100A (en) * | 1981-02-26 | 1982-09-01 | Toshiba Corp | Method for signal recording |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49135566A (en) * | 1973-04-28 | 1974-12-27 | ||
JPS5346209A (en) * | 1976-10-08 | 1978-04-25 | Matsushita Electric Ind Co Ltd | Sectional dpcm system |
-
1979
- 1979-04-06 JP JP4215479A patent/JPS55134478A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49135566A (en) * | 1973-04-28 | 1974-12-27 | ||
JPS5346209A (en) * | 1976-10-08 | 1978-04-25 | Matsushita Electric Ind Co Ltd | Sectional dpcm system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57141100A (en) * | 1981-02-26 | 1982-09-01 | Toshiba Corp | Method for signal recording |
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