JPS6441511A - Digital audio tone controller - Google Patents
Digital audio tone controllerInfo
- Publication number
- JPS6441511A JPS6441511A JP62197958A JP19795887A JPS6441511A JP S6441511 A JPS6441511 A JP S6441511A JP 62197958 A JP62197958 A JP 62197958A JP 19795887 A JP19795887 A JP 19795887A JP S6441511 A JPS6441511 A JP S6441511A
- Authority
- JP
- Japan
- Prior art keywords
- characteristic
- bus
- control means
- overflow
- dsp11
- 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.)
- Granted
Links
Landscapes
- Circuit For Audible Band Transducer (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
PURPOSE:To always prevent overflow by providing a bus control means, a trebble control means, a rewrite control means for two filter coefficients and a means performing revision for a prescribed period and switching the characteristic into the lower characteristic by one step at that point of time when a digital signal processor is approaching overflow. CONSTITUTION:If digital signal processors DSP11, DSP12 are going to tend to overflow in the arithmetic operation, when an output signal from a terminal (x) of the DSP11 is given to the 1st interrupt input terminal INT1 of a central processing unit CPU via an OR circuit ORb, the lower bus characteristic by one step is selected and the result is written in a coefficient set section. Then a switching pulse is generated to set an internal counter 1 and the system is restored. When the internal counter 1 reaches timeup after a prescribed time, the bus characteristic coefficient over by one step to increase the bus control variable is selected. Thus, a digital audio signal not being an object of tone control has no S/N deterioration at no emphasis state.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62197958A JP2566418B2 (en) | 1987-08-07 | 1987-08-07 | Digital audio tone control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62197958A JP2566418B2 (en) | 1987-08-07 | 1987-08-07 | Digital audio tone control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6441511A true JPS6441511A (en) | 1989-02-13 |
JP2566418B2 JP2566418B2 (en) | 1996-12-25 |
Family
ID=16383145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62197958A Expired - Lifetime JP2566418B2 (en) | 1987-08-07 | 1987-08-07 | Digital audio tone control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2566418B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016070256A (en) * | 2014-10-01 | 2016-05-09 | 株式会社小野測器 | Injection amount measurement device and method |
JP2018510550A (en) * | 2015-02-12 | 2018-04-12 | 電信科学技術研究院 | Method and apparatus for determining presets for a timbre equalizer (AEQ) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55163908A (en) * | 1979-06-08 | 1980-12-20 | Takayoshi Hirata | Digital tone control circuit |
JPS5880910A (en) * | 1981-11-06 | 1983-05-16 | Sony Corp | Tone control circuit |
JPS6259408A (en) * | 1985-09-09 | 1987-03-16 | Victor Co Of Japan Ltd | Digital graphic equalizer |
-
1987
- 1987-08-07 JP JP62197958A patent/JP2566418B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55163908A (en) * | 1979-06-08 | 1980-12-20 | Takayoshi Hirata | Digital tone control circuit |
JPS5880910A (en) * | 1981-11-06 | 1983-05-16 | Sony Corp | Tone control circuit |
JPS6259408A (en) * | 1985-09-09 | 1987-03-16 | Victor Co Of Japan Ltd | Digital graphic equalizer |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016070256A (en) * | 2014-10-01 | 2016-05-09 | 株式会社小野測器 | Injection amount measurement device and method |
JP2018510550A (en) * | 2015-02-12 | 2018-04-12 | 電信科学技術研究院 | Method and apparatus for determining presets for a timbre equalizer (AEQ) |
Also Published As
Publication number | Publication date |
---|---|
JP2566418B2 (en) | 1996-12-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |